CN104081872B

CN104081872B - Demodulated reference signal transmissions method, user equipment and base station

Info

Publication number: CN104081872B
Application number: CN201380002026.3A
Authority: CN
Inventors: 夏亮; 闫志宇; 马莎
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-01-25
Filing date: 2013-01-25
Publication date: 2018-01-23
Anticipated expiration: 2033-01-25
Also published as: CN108111291B; WO2014113971A1; CN108111291A; CN104081872A

Abstract

The present invention provides a kind of demodulated reference signal（DMRS）Transmission method, user equipment and base station, this method include：User equipment receives the DMRS instruction message that base station is sent, and DMRS instruction message is used for the DMRS patterns for indicating DMRS antenna ports, the resource element that DMRS patterns are the position for the running time-frequency resource that DMRS be present and/or DMRS takes（RE）Position (101) in running time-frequency resource；User equipment indicates message according to DMRS, determines the DMRS patterns (102) of DMRS antenna ports；User equipment obtains DMRS (103) according to the DMRS patterns of DMRS antenna ports.Using the present invention, base station sends DMRS according to the relatively low DMRS patterns of DMRS expenses to user equipment, user equipment obtains DMRS according to the relatively low DMRS patterns of the expense, it is achieved thereby that when DMRS expenses are relatively low increase can secured transmission of payload data RE, improve RE utilization rate and data transmission rate.

Description

Demodulation reference signal transmission method, user equipment and base station

Technical Field

The embodiments of the present invention relate to communications technologies, and in particular, to a demodulation reference Signal (DMRS) transmission method, a user equipment, and a base station.

Background

In a wireless communication system, User Equipment (UE) estimates a downlink channel through a DMRS transmitted by a base station. For example: in a Long Term Evolution (Long Term Evolution, abbreviated as LTE) Release10 (Release 10, abbreviated as R10) system, a user equipment demodulates a Physical Downlink Shared Channel (PDSCH) according to DMRS, or, in an LTE Release 11 (Release 10, abbreviated as R11) system, the user equipment demodulates an Enhanced Physical Downlink Control Channel (EPDCCH) according to DMRS.

In the prior art, a base station carries a DMRS in a Resource Element (Resource Element, RE) of a Resource Block (RB) pair according to a DMRS pattern of a DMRS antenna port specified by a preset LTE protocol, and then sends the DMRS to a user equipment, where the user equipment obtains the DMRS according to the preset DMRS pattern of the DMRS antenna port, where the DMRS pattern is a position of the RE occupied by the DMRS in the RB pair, for example, as shown in fig. 1, R7 indicates the RE occupied by the DMRS, and the RE not carrying the DMRS may be used to carry data sent by the base station to the UE.

However, in the prior art, a base station with a small coverage transmits DMRSs according to DMRS patterns of DMRS antenna ports specified by an LTE protocol, so that RE overhead occupied by the DMRSs is large, for example, the overhead occupancy may be 7%, and the utilization rate of REs is reduced.

Disclosure of Invention

The demodulation reference signal transmission method, the user equipment and the base station are used for reducing the expense of RE occupied by the DMRS and improving the utilization rate of the RE.

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

the method comprises the steps that user equipment receives DMRS indication information sent by a base station, the DMRS indication information is used for indicating DMRS patterns of a DMRS antenna port, and the DMRS patterns are positions of time-frequency resources with DMRS and/or positions of resource elements occupied by the DMRS in the time-frequency resources;

the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message;

and the user equipment acquires the DMRS according to the DMRS pattern of the DMRS antenna port.

In a first possible implementation manner of the first aspect, the receiving, by the user equipment, a DMRS indication message sent by a base station, where the DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port, includes:

the user equipment receives a DMRS indication message sent by the base station, wherein the DMRS indication message is used for indicating a DMRS pattern of at least one DMRS antenna port; or,

and the user equipment receives at least two DMRS indication messages sent by the base station, wherein each DMRS indication message is used for indicating the DMRS pattern of one 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 a DMRS antenna port, and the method includes:

the DMRS indication message is used for indicating the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, wherein the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining 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 cell-specific signaling sent by the base station through a system information block, a main message block, higher layer signaling, media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in the 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; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

the user equipment acquires the cell type according to the cell specific signaling;

and the user equipment determines the 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 a user equipment-specific signaling that is sent by the base station through a higher layer signaling or a media access control signaling.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the ue-specific signaling includes a transmission mode of a physical downlink shared channel PDSCH; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

the user equipment acquires the transmission mode of the PDSCH according to the special signaling of the user equipment;

and the user equipment determines the 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 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 any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the fourth possible implementation manner 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the sixth possible implementation manner 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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 tenth possible implementation manner of the first aspect, the DMRS indication message is a dynamic signaling sent by the base station through 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 redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

and the user equipment determines the 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 an eleventh possible implementation manner of the first aspect, the DMRS indication message is downlink control information sent by the base station through a physical downlink control channel; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

the user equipment determines the subframe number of the subframe where the downlink control information is located according to the downlink control information, or determines the subframe number of the subframe indicated by the downlink control information according to the downlink control information;

and the user equipment determines the 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 determining, by the user equipment, the DMRS pattern for the DMRS antenna port according to the subframe number includes:

if the difference between the subframe number of the subframe where the current downlink control information is located and the subframe number of the subframe where the last downlink control information is located is larger than a first number difference value preset value, the user equipment determines that the position of the time-frequency resource with the DMRS is the subframe where the current downlink control information is located; or,

and if the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe where the last downlink control information is located is greater than a second number difference preset value, the user equipment determines the position of the time-frequency resource with the DMRS as the subframe indicated by the current downlink control information.

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

With reference to the first aspect or any one of the first to thirteenth implementation manners of the first aspect, in a fourteenth implementation manner of the first aspect, all resource blocks, scheduled to the user equipment, in M time-frequency resources use the same precoding, where M is a natural number.

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

the user equipment acquires the mapping relation between the PDSCH and/or the EPDCCH and resource elements according to the DMRS pattern of the DMRS antenna port;

the user equipment acquires the PDSCH and/or the EPDCCH according to the mapping relation;

the user equipment demodulates the PDSCH and/or EPDCCH according to the DMRS; or,

and the user equipment calculates the Channel Quality Indicator (CQI) according to the DMRS.

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

the user equipment determines an additional DMRS pattern of the DMRS antenna port, wherein the additional DMRS pattern is the position of a time-frequency resource with zero-power DMRS and/or the position of a resource element occupied by the zero-power DMRS in the time-frequency resource;

the user equipment acquires the mapping relation between the PDSCH and/or the EPDCCH and resource elements according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port;

and the user equipment demodulates the PDSCH and/or EPDCCH according to the DMRS.

A sixteenth possible implementation manner of the first aspect, in a seventeenth possible implementation manner of the first aspect, the determining, by the user equipment, the additional DMRS pattern for the DMRS antenna port includes:

the user equipment 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 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 possible implementation manners of the first to seventeenth implementation manners of the first aspect, in an eighteenth possible implementation manner of the first aspect, before the receiving, by the user equipment, 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;

and the user equipment sends the at least one DMRS pattern to the base station through high-layer signaling or a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), so that the base station determines the DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

With reference to the eighteenth possible implementation manner of the first aspect, in a nineteenth possible implementation manner of the first aspect, the selecting, by the user equipment, at least one DMRS pattern from a 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 of the user equipment or the downlink channel information or the DMRS processing capacity of the user equipment.

With reference to the eighteenth possible implementation manner of the first aspect or the nineteenth possible implementation manner of the first aspect, in a twentieth possible implementation manner of the first aspect, the sending, by the user equipment, the at least one DMRS pattern to the base station through higher layer signaling or PUCCH or PUSCH includes:

the user equipment transmits a rank indication together with the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH.

With reference to the twenty-first possible implementation manner of the first aspect, in a twenty-first possible implementation manner of the first aspect, the sending, by the user equipment, a rank indication and the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH includes:

the user equipment jointly encoding a rank indication and the at least one DMRS pattern;

and the user equipment sends the jointly coded rank indication and at least one DMRS pattern to the base station through the high-level signaling or PUCCH or PUSCH.

With reference to the first aspect or any one of the first to the seventeenth implementation manners of the first aspect, in a twenty-second possible implementation manner of the first aspect, before the receiving, by the user equipment, the DMRS indication message sent by the base station, the method further includes:

and the user equipment reports DMRS processing capability indication information to the base station so that the base station determines the number of the DMRS patterns which can be processed by the user equipment and/or the DMRS patterns which can be processed by the user equipment according to the DMRS processing capability indication information.

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

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

the base station sends a DMRS indication message to user equipment, wherein the DMRS indication message is used for indicating a DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of a time-frequency resource with the DMRS and/or the position of a 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 acquires the DMRS according to the DMRS pattern of the DMRS antenna port;

and the base station transmits the DMRS to the user equipment according to the DMRS pattern.

In a first possible implementation manner of the second aspect, the sending, by the base station, a DMRS indication message to a user equipment, where the DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port, includes:

the base station transmits a DMRS indication message to the user equipment, wherein the DMRS indication message is used for indicating the DMRS pattern of at least one DMRS antenna port; or,

and the base station sends at least two DMRS indication messages to the user equipment, wherein each DMRS indication message is used for indicating the DMRS pattern of one 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 a DMRS antenna port, and the method includes:

the DMRS indication message comprises the density of the DMRS, the interval degree of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, and the density of the DMRS, the interval degree of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining 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 sending, by the base station, the DMRS indication message to the user equipment includes:

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

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

the base station determines a DMRS pattern of a DMRS antenna port according to the cell type;

the cell-specific signaling comprises 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 pattern of the DMRS antenna port according to the cell type.

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 sending, by the base station, the DMRS indication message to the user equipment includes:

and the base station sends a user equipment special signaling to the user equipment through a high-level signaling or a media access control signaling.

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

the base station determines a DMRS pattern of a DMRS antenna port according to a transmission mode of a Physical Downlink Shared Channel (PDSCH);

wherein the UE-specific signaling comprises a transmission mode of the PDSCH, so that the UE determines the transmission mode of the PDSCH according to the UE-specific signaling and determines the 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 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 any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the fourth possible implementation manner of the second aspect, in an eighth possible implementation manner of the second aspect, the cell type is further used to determine any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the sixth possible implementation manner 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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 tenth possible implementation manner of the second aspect, 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 through a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines the DMRS pattern of the DMRS antenna port according to the dynamic signaling, and the dynamic signaling comprises any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating Modulation Coding Scheme (MCS), signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein N is 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 sending, by the base station, the DMRS indication message to the user equipment includes:

the base station sends downlink control information to the user equipment through a Physical Downlink Control Channel (PDCCH) so that the user equipment determines the subframe number of a subframe where the downlink control information is located according to the downlink control information, or the user equipment determines the subframe number of a subframe indicated by the downlink control information according to the downlink control information and determines the DMRS pattern of the DMRS antenna port according to the subframe number.

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

With reference to the second aspect or any one of the first to twelfth implementation manners of the second aspect, in a thirteenth possible implementation manner of the second aspect, all resource blocks, scheduled to the user equipment, in M time-frequency resources use the same precoding, where M is a natural number.

With reference to the second aspect or any one possible implementation manner of the first to thirteenth implementation manners of the second aspect, in a fourteenth possible implementation manner of the second aspect, after the determining, by the base station, a DMRS pattern of a DMRS antenna port, the method further includes:

the base station performs resource mapping of PDSCH and/or EPDCCH and resource elements according to the DMRS pattern of the DMRS antenna port;

and 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 thirteenth implementation manners of the second aspect, in a fifteenth possible implementation manner of the second aspect, the method further includes:

the base station determining an additional DMRS pattern for the DMRS antenna port;

the base station performs resource mapping of PDSCH and/or EPDCCH and resource elements according to the DMRS pattern and/or an additional DMRS pattern of the DMRS antenna port, wherein the additional DMRS pattern is the position of a time-frequency resource with zero-power DMRS and/or the position of the resource element occupied by the zero-power DMRS in the time-frequency resource;

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

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

after the base station determines the additional DMRS pattern for the DMRS antenna port, the method further includes:

and the base station transmits an additional DMRS indication message to the user equipment, wherein the additional DMRS indication message is used for indicating an additional DMRS pattern of the DMRS antenna port, so that the user equipment determines the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

With reference to the second aspect or any one of possible implementations of the first to thirteenth implementations of the second aspect, in combination with the second aspect or any one of possible implementations of the first to sixteenth implementations of the second aspect, in a seventeenth possible implementation of the second aspect, before the determining, by the base station, the DMRS pattern for a DMRS antenna port, the method further includes:

the base station receives at least one DMRS pattern sent by the user equipment through a high-level signaling or a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), wherein the at least one DMRS pattern is selected from a DMRS pattern candidate set by the user equipment;

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

and the base station determines the DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

With reference to the seventeenth possible implementation manner of the second aspect, in an eighteenth possible implementation manner of the second aspect, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set according to a moving speed of the user equipment, or downlink channel information, or DMRS processing capability of the user equipment.

With reference to the seventeenth possible implementation manner 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 receiving, by the base station, at least one DMRS pattern sent by the user equipment through a higher layer signaling or a PUCCH or a PUSCH includes:

and the base station receives the at least one DMRS pattern and the rank indication sent by the user equipment through the high-layer signaling or PUCCH or PUSCH.

With reference to the nineteenth possible implementation manner of the second aspect, in a twentieth possible implementation manner of the second aspect, the receiving, by the base station, the rank indication and the at least one DMRS pattern transmitted by the user equipment through the higher layer signaling or the PUCCH or the PUSCH includes:

and the base station receives the rank indication and at least one DMRS pattern which are sent by the user equipment through the high-layer signaling or PUCCH or PUSCH and are subjected to the joint coding.

With reference to the second aspect or any one of the first to the sixteenth implementation manners of the second aspect, in a twenty-first possible implementation manner of the second aspect, before the determining, by the base station, a DMRS pattern of a DMRS antenna port, the method further includes:

the base station receives DMRS processing capacity indication information reported by the user equipment;

and the base station determines the number of the DMRS patterns which can be processed by the user equipment and/or the DMRS patterns which can be processed by the user equipment according to the DMRS processing capability indication information.

With reference to the second aspect or any one of the first to twenty-first implementation manners of the second aspect, in a twenty-second possible implementation manner of the second aspect, the method further includes:

and if at least two candidate DMRS patterns of the DMRS antenna port have overlapped resource elements in the same time frequency resource, mapping the same DMRS on the overlapped resource elements in the same time frequency resource according to the at least two candidate DMRS patterns.

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

the base station comprises a receiving module and a sending module, wherein the receiving module is used for receiving a DMRS indication message sent by the base station, the DMRS indication message is used for indicating a DMRS pattern of a DMRS antenna port, and the DMRS pattern is the position of a time-frequency resource with the DMRS and/or the position of a resource element occupied by the DMRS in the time-frequency resource;

a determining module, configured to determine, according to the DMRS indication message received by the receiving module, a DMRS pattern of the DMRS antenna port;

and the acquisition module is used for acquiring the DMRS according to the DMRS pattern of the DMRS antenna port determined by the determination module.

In a first possible implementation manner of the third aspect, the receiving module is specifically configured to:

receiving one DMRS indication message sent by the base station, wherein the one DMRS indication message is used for indicating the DMRS pattern of at least one DMRS antenna port; or,

and receiving at least two DMRS indication messages sent by the base station, wherein each DMRS indication message is used for indicating the DMRS pattern of one DMRS antenna port.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the indicating DMRS patterns for DMRS antenna ports are indicated by the DMRS indication message received by the receiving module, and the indicating DMRS patterns include:

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 received by the receiving module is cell-specific signaling sent by the base station through a system information block, a primary message block, a higher layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in the cyclic prefix.

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 determining the 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 received by the receiving module is a user equipment-specific signaling sent by the base station through a higher layer signaling or a 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 ue-specific signaling received by the receiving module; and determining the 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 received by the receiving module is further used to indicate any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the fourth possible implementation manner of the third aspect, in an eighth possible implementation manner of the third aspect, the determining module is further configured to determine, according to the cell type, any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the sixth possible implementation manner 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, any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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 received by the receiving module is a dynamic signaling sent by the base station through 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 redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number;

the determining module is specifically configured to determine the 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 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 determine, according to the downlink control information received by the receiving module, a subframe number of a subframe indicated by the downlink control information; and determining the 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 a twelfth possible implementation manner of the third aspect, the determining module is specifically configured to:

judging whether the difference between the subframe number of the subframe where the current downlink control information is located and the subframe number of the subframe where the last downlink control information is located is larger than a first number difference preset value, and determining the position of the time-frequency resource with the DMRS as the subframe where the current downlink control information is located; or,

and if the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe where the last downlink control information is located is larger than a second number difference preset value, determining the position of the time-frequency resource with the DMRS as the subframe indicated by the current downlink control information.

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

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

With reference to the third aspect or any one possible implementation manner of the first to 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 obtain a mapping relationship between a PDSCH and/or an EPDCCH and a resource element according to the DMRS pattern determined by the determining module; acquiring the PDSCH and/or the EPDCCH according to the mapping relation; demodulating the PDSCH and/or the EPDCCH according to the DMRS acquired by the acquisition module; or,

the first processing module is used for calculating the channel quality indicator CQI according to the DMRS acquired by the acquisition module.

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

the determination module is further used for determining an additional DMRS pattern of the DMRS antenna port, wherein the additional DMRS pattern is the position of a time-frequency resource with zero-power DMRS and/or the position of a resource element occupied by the zero-power DMRS in the time-frequency resource;

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

With reference to the sixteenth possible implementation manner of the third aspect, in a seventeenth possible implementation manner of the third aspect, the determining module is specifically configured to determine, before the second processing module acquires a mapping relationship between a PDSCH and/or an EPDCCH and a resource element according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port, the additional DMRS pattern of the DMRS antenna port according to the DMRS pattern and/or the additional DMRS pattern; or,

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

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

With reference to the third aspect or any one possible implementation manner of the first to seventeenth implementation manners of the third aspect, in an eighteenth possible implementation manner of the third aspect, the method further includes:

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;

and the first sending module is used for sending the at least one DMRS pattern selected by the selecting module to the base station through a high-level signaling or a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), so that the base station determines the DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

With reference to 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 select the at least one DMRS pattern from the DMRS pattern candidate set according to a moving speed of the user equipment, or downlink channel information, or DMRS processing capability of the user equipment.

With reference to the eighteenth possible implementation manner of the third aspect or the nineteenth possible implementation manner of the third aspect, in a twentieth possible implementation manner of the third aspect, the first sending module is specifically configured to send a rank indication and the at least one DMRS pattern together to the base station through the higher layer signaling or PUCCH or PUSCH.

With reference to the twenty-first possible implementation manner of the third aspect, in a twenty-first possible implementation manner of the third aspect, the method further includes:

a third processing module for jointly encoding a rank indication 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 through the higher layer signaling or the PUCCH or the PUSCH.

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

and a second sending module, configured to report DMRS processing capability indication information to the base station before the receiving module receives the DMRS indication message sent by the base station, so that the base station determines, according to the DMRS processing capability indication message, the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment.

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

a determining module for determining a DMRS pattern of a DMRS antenna port;

a sending module, configured to send a DMRS indication message to a 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 position of a time-frequency resource in which a DMRS exists and/or a position of a 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 acquires the DMRS according to the 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:

transmitting one DMRS indication message to the user equipment, wherein the one DMRS indication message is used for indicating a DMRS pattern of at least one DMRS antenna port; or,

and transmitting at least two DMRS indication messages to the user equipment, wherein each DMRS indication message is used for indicating the DMRS pattern of one 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 sending module is configured to send the DMRS indication message to indicate a DMRS pattern of a DMRS antenna port, and includes:

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 configured to send the cell-specific signaling to the user equipment through a system information block, a primary message block, a higher layer signaling, a media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in the cyclic prefix.

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

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 determines the DMRS pattern of the DMRS antenna port according to the cell type.

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, the sending module is specifically configured to send a user equipment-specific signaling to the user equipment through a higher layer signaling or a media 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, according to a transmission mode of a PDSCH (physical downlink shared channel), a DMRS pattern of a DMRS antenna port;

the UE-specific signaling sent by the sending module comprises the transmission mode of the PDSCH, so that the UE determines the transmission mode of the PDSCH according to the UE-specific signaling and determines the 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 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 is further used to indicate any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

With reference to the sixth possible implementation manner of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the transmission mode of the PDSCH is further used to determine any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a 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, the sending module is specifically configured to send dynamic signaling to the user equipment through a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines, according to the dynamic signaling, a DMRS pattern of the DMRS antenna port, where the dynamic signaling includes any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating Modulation Coding Scheme (MCS), signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein 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 an eleventh possible implementation manner of the fourth aspect, the sending module is specifically configured to send downlink control information to the user equipment through a physical downlink control channel PDCCH, so that the user equipment determines, according to the downlink control information, a subframe number of a subframe where the downlink control information is located, or so that the user equipment determines, according to the downlink control information, a subframe number of a subframe indicated by the downlink control information, and determines, according to the subframe number, the DMRS pattern of the DMRS antenna port.

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

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

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

a first processing module, configured to perform resource mapping between a PDSCH and/or an EPDCCH and resource elements according to the DMRS pattern after the determination module determines the DMRS pattern of the DMRS antenna port;

the transmitting module is further configured to transmit the PDSCH and/or EPDCCH to the user equipment.

With reference to the fourth aspect or any one of the first to thirteenth implementation manners of the fourth aspect, in a fifteenth possible implementation manner of the fourth aspect, the apparatus further includes a second processing module;

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

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 for the DMRS antenna port, so that the user equipment determines the additional DMRS pattern for the DMRS antenna port according to the DMRS indication message; or,

the sending module is further used for sending an additional DMRS indication message to the user equipment after the determining module determines the additional DMRS pattern of the DMRS antenna port, wherein the additional DMRS indication message is used for indicating the additional DMRS pattern of the DMRS antenna port, so that the user equipment can determine the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

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

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

the determining module is specifically configured to determine the DMRS pattern for the DMRS antenna port based on the at least one DMRS pattern received by the first receiving module.

With reference to the seventeenth possible implementation manner of the fourth aspect, in an eighteenth possible implementation manner of the fourth aspect, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set according to a moving speed of the user equipment, or downlink channel information, or DMRS processing capability of the user equipment.

With reference to the seventeenth possible implementation manner of the fourth aspect or the eighteenth possible implementation manner of the fourth aspect, in a nineteenth possible implementation manner of the fourth aspect, the first receiving module is specifically configured to receive the at least one DMRS pattern and a rank indication transmitted by the user equipment through the higher layer signaling or the PUCCH or the PUSCH.

With reference to the eighteenth possible implementation manner of the fourth aspect, in a twentieth possible implementation manner of the fourth aspect, the first receiving module is specifically configured to receive the jointly coded rank indication and the at least one DMRS pattern, which are sent by the user equipment through the higher layer signaling or the PUCCH or the PUSCH.

With reference to the fourth aspect or any one of the first to sixteenth implementation manners of the fourth aspect, in a twenty-first possible implementation manner of the fourth aspect, the method further includes:

a second receiving module, configured to receive DMRS processing capability indication information reported by the user equipment before the determining module determines the DMRS pattern of the DMRS antenna port;

the determining module is further configured to determine, according to the DMRS processing capability indication information, the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment.

With reference to the fourth aspect or any one of the first to twenty-first implementation manners of the fourth aspect, in a twenty-second possible implementation manner of the fourth aspect, the method further includes:

and the third processing module is used for judging that if at least two candidate DMRS patterns of the DMRS antenna port have overlapped resource elements in the same time-frequency resource, mapping the same DMRS on the overlapped resource elements in the same time-frequency resource according to the at least two candidate DMRS patterns.

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

the base station comprises a receiver and a sending module, wherein the receiving module is used for receiving a DMRS indication message sent by the base station, the DMRS indication message is used for indicating a DMRS pattern of a DMRS antenna port, and the DMRS pattern is the position of a time-frequency resource with the DMRS and/or the position of a resource element occupied by the DMRS in the time-frequency resource;

a processor, configured to determine a DMRS pattern for the DMRS antenna port according to the DMRS indication message received by the receiver; and acquiring the DMRS according to the DMRS pattern of the DMRS antenna port determined by the determination module.

In a first possible implementation manner of the fifth aspect, the receiver is specifically configured to:

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 pattern of a DMRS antenna port, and the method includes:

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 received by the receiver is cell-specific signaling sent by the base station through a system information block, a primary message block, a higher layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in the cyclic prefix.

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 determining the 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 received by the receiver is user equipment-specific signaling sent by the base station through a higher layer signaling or a media 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 ue-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 ue-specific signaling received by the receiver; and determining the 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 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 is further used to indicate any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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, according to the cell type, any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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 information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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 received by the receiver is a dynamic signaling sent by the base station through 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 redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number;

the processor is specifically configured to determine a DMRS pattern for the DMRS antenna port based on the dynamic signaling received by the receiver.

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 received by the receiver is downlink control information sent by the base station through 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 determine, according to the downlink control information received by the receiving module, a subframe number of a subframe indicated by the downlink control information; and determining the 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:

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

With reference to the fifth aspect or any one of the first to thirteenth implementation manners of the fifth aspect, in a fourteenth implementation manner of the fifth aspect, all resource blocks, scheduled to the user equipment, in M time-frequency resources use the same precoding, where M is a natural number.

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

the processor is further configured to perform Channel Quality Indicator (CQI) calculation according to the DMRS acquired by the acquisition module.

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

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

the receiver is further used for receiving an additional DMRS indication message sent by the base station before the processor acquires the mapping relation between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port;

the processor is specifically configured to determine an additional DMRS pattern for the DMRS antenna port based on the additional DMRS indication message.

With reference to the fifth aspect or any one of the first to the seventeenth implementation manners of the fifth aspect, in an eighteenth possible implementation manner of the fifth aspect, the processor is further configured to select at least one DMRS pattern from the candidate set of DMRS patterns before the receiver receives the DMRS indication message sent by the base station;

the user equipment further comprises: a transmitter;

the transmitter is configured to send the at least one DMRS pattern selected by the processor 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 the base station determines the DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

With reference to 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 select the at least one DMRS pattern from the DMRS pattern candidate set according to a moving speed of the user equipment, or downlink channel information, or DMRS processing capability of the user equipment.

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 transmitter is specifically configured to transmit a rank indication and the at least one DMRS pattern together to the base station through the higher layer signaling or PUCCH or PUSCH.

With reference to the twenty-first possible implementation manner of the fifth aspect, in a twenty-first possible implementation manner of the fifth aspect, the processor is further configured to jointly encode a rank indication 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 through the higher layer signaling or the PUCCH or the PUSCH.

With reference to the fifth aspect or any one of the twenty-first to the twentieth implementation manners of the fifth aspect, in a twenty-first possible implementation manner of the fifth aspect, the transmitter is further configured to report DMRS processing capability indication information to the base station before the receiver receives the DMRS indication message sent by the base station, so that the base station determines, according to the DMRS processing capability indication message, the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment.

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

a processor to determine a DMRS pattern for a DMRS antenna port;

a transmitter, configured to transmit a DMRS indication message to a 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 position of a time-frequency resource in which a DMRS exists and/or a position of a 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 acquires the DMRS according to the 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:

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 pattern of a DMRS antenna port, and the method includes:

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 transmitter is specifically configured to send the cell-specific signaling to the user equipment through a system information block, a primary message block, a higher layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in the 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, according to a cell type, a DMRS pattern for a DMRS antenna port;

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 determines the DMRS pattern of the DMRS antenna port according to the cell type.

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 transmitter is specifically configured to send a user equipment-specific signaling to the user equipment through a higher layer signaling or a media 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, according to a transmission mode of a PDSCH (physical downlink shared channel), a DMRS pattern of a DMRS antenna port;

wherein the UE-specific signaling sent by the transmitter includes the transmission mode of the PDSCH, so that the UE determines the transmission mode of the PDSCH according to the UE-specific signaling and determines the 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 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 is further used to indicate any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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 transmitter is specifically configured to send dynamic signaling to the user equipment through a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines, according to the dynamic signaling, a DMRS pattern for the DMRS antenna port, where the dynamic signaling includes any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating Modulation Coding Scheme (MCS), signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein 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 an eleventh possible implementation manner of the sixth aspect, the transmitter is specifically configured to send downlink control information to the user equipment through a physical downlink control channel PDCCH, so that the user equipment determines, according to the downlink control information, a subframe number of a subframe where the downlink control information is located, or so that the user equipment determines, according to the downlink control information, a subframe number of a subframe indicated by the downlink control information, and determines, according to the subframe number, the DMRS pattern of the DMRS antenna port.

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

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

With reference to the sixth aspect or any one of the possible implementation manners of the first to thirteenth implementation manners of the sixth aspect, in a fourteenth possible implementation manner of the sixth aspect, the processor is further configured to perform resource mapping of the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern after determining the DMRS pattern of the DMRS antenna port;

the transmitter is further configured to transmit the PDSCH and/or EPDCCH to the user equipment.

With reference to the sixth aspect or any one of the possible implementations of the first to thirteenth implementations of the sixth aspect, in a fifteenth possible implementation of the sixth aspect, the processor is further configured to determine an additional DMRS pattern for the DMRS antenna port, where the additional DMRS pattern is a position of a time-frequency resource in which a zero-power DMRS exists and/or a position of a resource element occupied by the zero-power DMRS in the time-frequency resource; performing resource mapping of PDSCH and/or EPDCCH and resource elements according to the determined DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port;

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 for the DMRS antenna port, so that the user equipment determines the additional DMRS pattern for the DMRS antenna port according to the DMRS indication message; or,

the transmitter is further configured to transmit, after the processor determines the additional DMRS pattern of the DMRS antenna port, an additional DMRS indication message to the user equipment, where the additional DMRS indication message is used to indicate the additional DMRS pattern of the DMRS antenna port, so that the user equipment determines the additional DMRS pattern of the DMRS antenna port according to 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, in a seventeenth possible implementation manner of the sixth aspect, the method further includes:

a receiver, configured to receive, before the processor determines a DMRS pattern for a DMRS antenna port, at least one DMRS pattern sent by the user equipment through a higher layer signaling or a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH, where the at least one DMRS pattern is selected by the user equipment from a DMRS pattern candidate set;

the processor is specifically configured to determine a DMRS pattern for the DMRS antenna port based on at least one DMRS pattern received by the receiver.

With reference to the seventeenth possible implementation manner of the sixth aspect, in an eighteenth possible implementation manner of the sixth aspect, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set according to a moving speed of the user equipment, or downlink channel information, or DMRS processing capability of the user equipment.

With reference to 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 the at least one DMRS pattern and a rank indication transmitted by the user equipment through the higher layer signaling or the PUCCH or the PUSCH.

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 jointly coded rank indication and the at least one DMRS pattern, which are transmitted by the user equipment through the higher layer signaling or the PUCCH or the PUSCH.

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 configured to receive DMRS processing capability indication information reported by the user equipment before the processor determines the DMRS pattern of the DMRS antenna port;

the processor is further configured to determine, according to the DMRS processing capability indication information, the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment.

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

In the demodulation reference signal transmission method, the user equipment and the base station provided by the embodiment of the invention, the user equipment 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, namely, the position of the time-frequency resource with the DMRS and/or the position of the RE occupied by the DMRS in the time-frequency resource are determined, and the base station also sends the DMRS according to the DMRS pattern, so that the user equipment can obtain the DMRS according to the DMRS pattern, the base station sends the DMRS to the user equipment according to the DMRS pattern with lower DMRS overhead when the DMRS overhead is lower, and the user equipment obtains the DMRS according to the DMRS pattern with lower overhead, thereby solving the problems in the prior art, improving the utilization rate of the RE, increasing the RE capable of transmitting effective data and improving.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

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

fig. 2 is a flowchart of a first embodiment of a DMRS transmission method according to the present invention;

fig. 3 is a flowchart of a second DMRS transmission method embodiment of the present invention;

fig. 4 is a first schematic diagram of a DMRS pattern provided in an embodiment of the present invention;

fig. 5 is a second schematic diagram of a DMRS pattern provided by an embodiment of the present invention;

fig. 6 is a third schematic diagram of a DMRS pattern provided in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a ue according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second ue embodiment according to the present invention;

fig. 9 is a schematic structural diagram of a third ue embodiment according to the present invention;

fig. 10 is a schematic structural diagram of a base station according to a first embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second base station according to the embodiment of the present invention;

fig. 12 is a schematic structural diagram of a base station according to a third embodiment of the present invention;

fig. 13 is a schematic structural diagram of an embodiment of a DMRS transmission system according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 2 is a flowchart of a first DMRS transmission method according to an embodiment of the present invention, and as shown in fig. 2, the method according to this embodiment may include:

step 101, 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 a DMRS antenna port, and the DMRS pattern is a position of a time-frequency resource in which the DMRS exists and/or a position of an RE occupied by the DMRS in the time-frequency resource.

And step 102, the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message.

And 103, acquiring the DMRS by the user equipment 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 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 an RE occupied by the DMRS in the time-frequency resource, and then the user equipment may determine the DMRS pattern of the DMRS antenna port according to the DMRS indication message received from the base station, and meanwhile, it is known that the base station sends the DMRS to the user equipment according to the DMRS pattern, so that the user equipment may determine which time-frequency resources have the DMRS and/or the location of the RE occupied by the DMRS in the time-frequency resource, and thus may obtain the DMRS sent by the base station to.

The DMRS antenna port described in the embodiment of the present invention refers to an antenna port for transmitting DMRS and/or an antenna port for transmitting PDSCH and/or an antenna port for transmitting EPDCCH. For example, the DMRS antenna ports may be antenna ports 7-14 and antenna ports 107-110 specified in the LTER11 system.

The DMRS acquired by the ue in the embodiment of the present invention refers to a DMRS that is transmitted through a channel and superimposed with interference noise, and the acquired DMRS may be expressed asWhere S is the DMRS transmitted by the base station,DMRS acquired for the user equipment, H denotes a channel gain, Intf denotes an interference signal, and Noise denotes a Noise signal.

In the prior art, DMRS patterns specified in an LTE protocol are mainly configured for a base station and a user equipment, so that the base station can only transmit DMRS according to the DMRS patterns specified in the LTE protocol, and the user equipment can only acquire the DMRS according to the DMRS patterns specified in the LTE protocol, so that when the base station and the user equipment are actually applied, when RE overhead occupied by the actually-transmitted DMRS is less than RE overhead occupied by the DMRS in the DMRS patterns specified in the LTE protocol, the user equipment can only acquire the DMRS according to the DMRS patterns specified in the LTE protocol, and in order to receive the DMRS, the base station can only transmit the DMRS to the user equipment according to the DMRS patterns specified in the LTE protocol, thereby reducing the utilization rate of the RE.

In the DMRS transmission method provided in the embodiment of the present invention, the user equipment receives the DMRS indication message sent by the base station before receiving the DMRS sent by the base station, so as to obtain the DMRS pattern, that is, determine the position of the time-frequency resource in which the DMRS exists and/or the position of the RE occupied by the DMRS in the time-frequency resource, and the base station sends the DMRS according to the DMRS pattern, so that the user equipment can obtain the DMRS according to the DMRS pattern, thereby achieving that the base station sends the DMRS to the user equipment according to the DMRS pattern with lower DMRS overhead when the DMRS overhead is lower, and the user equipment obtains the DMRS according to the DMRS pattern with lower overhead.

Fig. 3 is a flowchart of a second DMRS transmission method embodiment of the present invention, and as shown in fig. 3, the method of this embodiment may include:

step 201, the base station determines the 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 a DMRS pattern of the DMRS antenna port, and the DMRS pattern is a position of a time-frequency resource in which the DMRS exists and/or a position of an RE 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 acquires the DMRS according to the DMRS pattern of the DMRS antenna port.

And step 203, the base station transmits the DMRS to the user equipment according to the DMRS pattern.

In this embodiment, a base station needs to transmit a DMRS to a user equipment according to a certain DMRS pattern, so that the base station first determines a DMRS pattern for a DMRS antenna port according to an application scenario to be used, and then transmits the DMRS to the user equipment according to the determined DMRS pattern, because the base station can determine the DMRS pattern for the DMRS antenna port from a plurality of DMRS pattern candidate sets, so that the base station needs to inform the user equipment of the DMRS pattern determined by the base station in order to enable the user equipment to accurately acquire the DMRS transmitted by the base station, and therefore, the base station transmits to the user equipment a DMRS indication message, the DMRS indication message is used to indicate the DMRS pattern for the DMRS antenna port, the DMRS pattern is a time-frequency resource location where the DMRS exists and/or a time-frequency resource where the DMRS occupies, so that the user equipment receives the DMRS indication message, can determine the DMRS pattern for the DMRS antenna, the DMRS and the REs are subjected to resource mapping according to the DMRS pattern, so that the user equipment can determine which time-frequency resources have the DMRS and/or the positions of the REs occupied by the DMRS in the time-frequency resources, and the DMRS sent to the user equipment by the base station can be acquired from the REs according to the specific positions of the REs occupied by the DMRS.

In the prior art, DMRS patterns specified in an LTE protocol are respectively configured for a base station and user equipment, and in practical application, no matter whether RE overhead occupied by a DMRS that needs to be actually transmitted is smaller than RE overhead occupied by a DMRS in a DMRS pattern specified in an LTE protocol, the base station can transmit the DMRS only according to the DMRS pattern specified in the LTE protocol, so that the utilization rate of REs is reduced.

The DMRS transmission method provided by the embodiment of the invention determines the DMRS pattern of the DMRS port, namely determines the position of the time-frequency resource with the DMRS and/or the position of the RE occupied by the DMRS in the time-frequency resource, informs the DMRS pattern to the user equipment through the DMRS indication message, and then transmits the DMRS 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, the base station transmits the DMRS to the user equipment according to the DMRS pattern with lower DMRS overhead when the DMRS overhead is lower, and the user equipment acquires the DMRS according to the DMRS pattern with lower overhead.

On the basis of the first embodiment of the present invention or the second embodiment of the present invention, the base station may send one DMRS indication message to the user equipment, and accordingly, the user equipment receives one 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. Specifically, the DMRS patterns of different DMRS antenna ports may be the same, so that one DMRS pattern may be determined by one DMRS indication message, and the DMRS patterns of all DMRS antenna ports are the DMRS pattern determined by the DMRS indication message; the DMRS patterns of different DMRS antenna ports can be different, and for each antenna port, the corresponding relation between the DMRS indication message and the DMRS pattern can be predefined, so that the DMRS patterns of different antenna ports can be determined according to the corresponding relation between the same DMRS indication message and the DMRS pattern corresponding to different antenna ports. So that signaling overhead of the DMRS indication message may be reduced.

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

The DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port, and includes: the DMRS indication message is used for indicating the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, wherein the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining the DMRS pattern of the DMRS antenna port. And the time-frequency resources may include: RB pair, RB group, half subframe, subframe group, or RB group on a subframe group; the time frequency resource can be predefined or configured to the user equipment by the base station.

The density of the DMRS may be the number of REs occupied by the DMRS in the time-frequency resource, and since there may be a corresponding relationship between the density of the DMRS and the DMRS pattern, the DMRS pattern of the DMRS antenna port may be determined by the density of the DMRS, for example, the REs occupied by the DMRS on the RB pair may be 12 (the DMRS pattern may be as shown in fig. 1, and the RE overhead occupied by the DMRS is 7%) or 4 (the DMRS pattern may be as shown in fig. 4, and the RE overhead occupied by the DMRS is 2.4%) or 2 (the DMRS pattern may be as shown in fig. 5, and the RE overhead occupied by the DMRS is 1.

The interval degree of the DMRS can be the interval number of time-frequency resources with the DMRS, if the interval number of the time-frequency resources with the DMRS is n, the fact that one time-frequency resource exists in every n time-frequency resources is indicated, wherein the position of the time-frequency resources with the DMRS in the n time-frequency resources can be predefined or can be notified to user equipment by a base station through signaling; because the interval degree of the DMRS and the DMRS pattern may have a corresponding relationship, the DMRS pattern of the DMRS antenna port may be determined by the interval degree of the DMRS, for example, the number of REs occupied by the DMRS on one RB pair may be 2, the interval of the RB pair having the DMRS is 2, the pilot pattern of the DMRS may be as shown in fig. 6, and the RE overhead occupied by the DMRS is 0.6% at this time.

The bitmap coding of the DMRS may be Y bits, wherein each bit corresponds to at least one RE that may be occupied by the DMRS, if one bit is set to '1', it indicates that at least one RE corresponding to the bit is occupied by the DMRS, if one bit is set to '0', it indicates that at least one RE corresponding to the bit is not occupied by the DMRS, for example, Y is 12, wherein each bit corresponds to an RE occupied by the DMRS in fig. 1, if one bit is set to '1', it indicates that an RE corresponding to the bit is occupied by the DMRS, if one bit is set to '0', it indicates that an RE corresponding to the bit is not occupied by the DMRS, for example, Y is 3, wherein each bit corresponds to 4 REs belonging to the same subcarrier occupied by the DMRS in fig. 1, if one bit is set to '1', it indicates that 4 REs corresponding to the bit are occupied by the DMRS, if one bit is set to be '0', the bit indicates that the 4 REs corresponding to the bit are not occupied by the DMRS, and the DMRS pattern of the DMRS antenna port can be determined through the bitmap coding of the DMRS because the bitmap coding of the DMRS and the DMRS pattern can have a corresponding relation.

If the DMRS indication message indicates the position of the time-frequency resource without the DMRS, the time-frequency resource with the DMRS can be correspondingly determined, and the DMRS pattern of the DMRS antenna port can be determined because the position of the time-frequency resource without the DMRS and the DMRS pattern can have a corresponding relation.

Further, all RBs scheduled to the user equipment in the M time-frequency resources use the same precoding, and M is a natural number. M may be 1, i.e. all RBs scheduled to the user equipment in each time-frequency resource use the same precoding; or, M may be the interval degree of the DMRS, and all RBs scheduled to the user equipment in the time-frequency resources within the interval number of the time-frequency resources of the DMRS use the same precoding, for example: as shown in fig. 6, if the number of RB pairs having DMRSs is 2, RB0 uses the same precoding as RB1, and RB2 and RB3 use the same precoding; or M may be any natural number greater than 2, specifically, the base station may configure a pre-coded RB group to the user equipment according to a predefined system bandwidth, and may also notify the user equipment of a value of M through a high-level signaling, where the pre-coded RB group includes RBs in M time-frequency resources, and then all RBs scheduled to the user equipment in the pre-coded RB group use the same pre-coding, and the user equipment may determine the value of M according to the predefined system bandwidth, or the user equipment obtains the value of M according to the high-level signaling sent by the base station.

The DMRS indication message and the DMRS pattern indicated by the DMRS indication message transmitted by the base station or received by the user equipment are illustrated below.

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

The value of k can be determined by equation (1):

wherein,the number of subcarriers contained for one RB, e.g.n_PRBIs the number of RB, n_PRBHas a value range of Is the maximum number of RBs in one slot, m 'is the first coefficient, m' =0, 1, 2;

k' is a second coefficient of the first coefficient,wherein p is the DMRS antenna port number.

The value of l can be determined by equation (2):

l=l'mod2+5 （2）

l' is a third coefficient of the coefficient,wherein n is_sMod represents the modulo remainder operation for the slot number.

Different DMRS patterns may pass through different m' and/or n_PRBAnd/or n_sAnd/or a collection of values for l'. The DMRS indication message may be a value set of m', and/or n_PRBAnd/or n_sAnd/or, a value set of l'. Wherein the value set of m' can indicate the density of the DMRS in the frequency domain and/or the position of the DMRS in the frequency domain, n_sThe value set of (a) and/or the value set of (l') may indicate the density of the DMRS in the time domain and/or the position of the DMRS in the frequency domain, n_PRBThe value set of (a) may indicate a degree of separation of the DMRS and/or a density of the DMRS in the frequency domain and/or a 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 cell-specific signaling sent by the base station through a System Information Block (SIB), a Master Information Block (MIB), a high-level signaling, a Media Access Control (MAC), or a set sequence in a cyclic prefix or a set scrambling code in the cyclic prefix. Specifically, a DMRS pattern candidate set of DMRS antenna ports may be predefined, and the DMRS pattern candidate set may include at least one DMRS pattern, for example, a DMRS pattern specified in LTE10 or a DMRS pattern specified in LTE10 or at least one DMRS pattern with low RE overhead occupied by a newly added DMRS according to an embodiment of the present invention, after determining the DMRS pattern of a DMRS antenna port from the DMRS pattern candidate set, the base station transmits cell-specific signaling to the user equipment through a set sequence in SIB, MIB, or a set scrambling code in a cyclic prefix, where the cell-specific signaling may be used to indicate the DMRS pattern, and after receiving the cell-specific signaling, the user equipment may determine whether the DMRS pattern is any one of a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE10 or at least one of DMRS patterns with low RE overhead occupied by a newly added DMRS according to the present invention, and the base station can send the DMRS to the user equipment according to the DMRS pattern determined by the base station, and the user equipment can acquire the DMRS according to the DMRS pattern indicated by the cell-specific signaling, so that the base station can select the DMRS pattern with lower RE overhead occupied by the DMRS to send the DMRS, and correspondingly, the user equipment can also determine the DMRS pattern with lower RE overhead occupied by the DMRS to acquire the DMRS, thereby achieving the purpose of saving RE. It should be noted that the cell-specific signaling sent by the base station to the ue through the SIB, the MIB, the set sequence in the cyclic prefix or the set scrambling code in the cyclic prefix is consistent with that in the prior art, and this embodiment is not described herein again.

Optionally, the DMRS indication message (in this embodiment, cell-specific signaling) is further used to indicate any one or more of the following information: the method includes the steps of receiving a maximum Modulation order of data, receiving a Modulation and Coding Scheme (MCS) table of the data, transmitting the maximum Modulation order of the data, transmitting the MCS table of the data, indicating Channel Quality (CQI) table, configuring a downlink control region, configuring uplink Sounding Reference Signal (SRS) configuration parameters, configuring a Downlink Control Information (DCI) format and a feedback mode, wherein the SBS configuration parameters include a SBS period and a subframe offset. And the base station sends the DMRS indication message which is also used for indicating any one or more information to the user equipment, and correspondingly, the user equipment can acquire the any one or more information indicated in the DMRS indication message.

The maximum Modulation order information of the received data is used to instruct the ue to determine a maximum Modulation order and/or a 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 256 QAM; the modulation and coding scheme table information of the received data is used to instruct the user equipment to determine the modulation and coding scheme table used by the PDSCH, for example, a plurality of modulation and coding scheme tables may be predefined, and the modulation and coding scheme table information of the received data is used to instruct the user equipment to use one of the modulation and coding scheme tables.

The maximum modulation order information of the transmission data is used for instructing the user equipment to determine the maximum modulation order and/or the maximum modulation scheme used by the PUSCH, for example, the maximum modulation order of the transmission data may be 4, or 6, or 8, and the maximum modulation scheme may be 16QAM, or 64QAM, or 256 QAM; the modulation and coding scheme table information of the transmission data is used for instructing the user equipment to determine the modulation and coding scheme table used by the PUSCH, for example, a plurality of modulation and coding scheme tables may be predefined, and the modulation and coding scheme table information of the transmission data is used for instructing the user equipment to use one of the modulation and coding scheme tables.

The channel quality indication table information is used to indicate a channel quality indication table used by the ue to determine the measurement reporting CQI, for example, multiple channel quality indication tables may be predefined, and the channel quality indication table information is used to indicate the ue to use one of the channel quality indication tables.

The downlink control region configuration information is used to instruct the user equipment to determine the configuration of the downlink control region, and determine the location of the downlink control region according to the configuration of the downlink control region, for example, the configuration of a plurality of downlink control regions may be predefined, and the configuration information of the downlink control region is used to instruct the user equipment to use the configuration of one of the downlink control regions.

The table information of the uplink sounding reference signal configuration parameters is used to instruct the user equipment to determine a table of the uplink sounding reference signal configuration parameters, the user equipment determines resources for sending the uplink sounding reference signal according to the table of the uplink sounding reference signal configuration parameters, for example, a plurality of tables of the uplink sounding reference signal configuration parameters may be predefined, and the table information of the uplink sounding reference signal configuration parameters is used to instruct the user equipment to use one of the tables of the uplink sounding reference signal configuration parameters.

The downlink control information format and the feedback mode information are used to instruct the user equipment to determine 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.

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

In the following, a DMRS indication message with a length of 1 bit is taken as an example, and the DMRS indication message has 2 states, i.e., '0' and '1', if the DMRS indication message is also used to indicate a maximum modulation order of received data and a modulation coding scheme table and a channel quality indication table of the received data, information of each state indication is as shown in the following table one

Watch 1

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

In the following, a DMRS indication message with a length of 2 bits is taken as an example, and the DMRS indication message has 4 states, that is, '00', '01', '10', and '11', if the DMRS indication message is also used to indicate a maximum modulation order of received data and a modulation coding scheme table and a channel quality indication table of the received data, information of each state indication is shown in table two.

Watch two

Since the DMRS indication message also indicates a plurality of information, signaling overhead may be reduced.

Optionally, the DMRS indication message (in this embodiment, cell-specific signaling) further includes any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, transmitting a maximum modulation order of the data, transmitting an MCS table of the data, indicating a channel quality table, configuring a downlink control area, configuring an uplink sounding reference signal configuration parameter, configuring a downlink control information format and a feedback mode, wherein the SRS configuration parameter comprises an SRS period and a subframe offset. The base station sends the DMRS indication message including any one or more of the above information to the user equipment, and accordingly, the user equipment may acquire any one or more of the above information included in the DMRS indication message. For the related description of any one or more of the above information, reference may be made to the related description in the above embodiments, which is not repeated in this embodiment.

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

Optionally, the cell type may also be used to determine any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving an MCS table of the data, transmitting the maximum modulation order of the data, transmitting the MCS table of the data, indicating a channel quality CQI table, configuring a downlink control region, configuring an uplink Sounding Reference Signal (SRS) configuration parameter, configuring a Downlink Control Information (DCI) format and a feedback mode, wherein the SRS configuration parameter comprises an SRS period and a subframe offset. Different cell types can determine the content in any one or more different information, the base station sends the cell-specific signaling including the cell type to the user equipment, correspondingly, the user equipment can acquire the cell type in the cell-specific signaling, and any one or more information can be determined according to the cell type. For a specific procedure of determining any one or more of the above information by the cell type, reference may be made to relevant descriptions of implementation procedures of the above information indicated by the DMRS indication message in the above embodiment, and this embodiment is not described herein again.

In the fourth embodiment of the DMRS transmission method of the present invention, the DMRS indication message may be a user equipment-specific signaling sent by the base station through a higher layer signaling or an MAC signaling. Specifically, a DMRS pattern candidate set of DMRS antenna ports may be predefined, and the DMRS pattern candidate set may include at least one DMRS pattern, for example, a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE10 or at least one DMRS pattern with low RE overhead occupied by a newly added DMRS according to an embodiment of the present invention, after the base station determines the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, the base station transmits cell-specific signaling to the user equipment through higher layer signaling or MAC signaling, the user equipment-specific signaling may be used to indicate the DMRS pattern, and after the user equipment receives the user equipment-specific signaling, the user equipment may determine whether the DMRS pattern is the DMRS pattern specified in LTE R10 or the DMRS pattern specified in LTE10 or any one of the at least one DMRS pattern with low RE overhead occupied by the newly added DMRS according to the present invention, and the base station can send the DMRS to the user equipment according to the DMRS pattern determined by the base station, and the user equipment can acquire the DMRS according to the DMRS pattern indicated by the user equipment proprietary signaling, so that the base station can select the DMRS pattern with lower RE overhead occupied by the DMRS to send the DMRS, and correspondingly, the user equipment can also determine the DMRS pattern with lower RE overhead occupied by the DMRS to acquire the DMRS, thereby achieving the purpose of saving RE. It should be noted that the ue-specific signaling sent by the base station to the ue through the high-level signaling or the MAC signaling is consistent with that in the prior art, and this embodiment is not described herein again.

Optionally, the DMRS indication message (in this embodiment, user equipment-specific signaling) is further used to indicate any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving an MCS table of the data, transmitting the maximum modulation order of the data, transmitting the MCS table of the data, indicating a channel quality CQI table, configuring a downlink control region, configuring an uplink Sounding Reference Signal (SRS) configuration parameter, configuring a Downlink Control Information (DCI) format and a feedback mode, wherein the SRS configuration parameter comprises an SRS period and a subframe offset. And the base station sends the DMRS indication message which is also used for indicating any one or more information to the user equipment, and correspondingly, the user equipment can acquire the any one or more information indicated in the DMRS indication message. The implementation process of the DMRS indication message indicating any one or more of the above information may refer to relevant descriptions in the foregoing embodiments, and this embodiment is not described herein again.

Optionally, the DMRS indication message (in this embodiment, user equipment-specific signaling) further includes any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving an MCS table of the data, transmitting the maximum modulation order of the data, transmitting the MCS table of the data, indicating a channel quality CQI table, configuring a downlink control region, configuring an uplink Sounding Reference Signal (SRS) configuration parameter, configuring a Downlink Control Information (DCI) format and a feedback mode, wherein the SRS configuration parameter comprises an SRS period and a subframe offset. The base station sends the DMRS indication message including any one or more of the above information to the user equipment, and accordingly, the user equipment may acquire any one or more of the above information included in the DMRS indication message. For the related description of any one or more of the above information, reference may be made to the related description in the above embodiments, which is not repeated in this embodiment.

Further, the base station may determine DMRS patterns for DMRS antenna ports according to the transmission mode of the PDSCH, for example: the corresponding relation between the transmission mode of the PDSCH and the DMRS pattern of the DMRS antenna port can be predefined in the base station, according to the corresponding relation, the base station can determine the DMRS pattern corresponding to the transmission mode of different PDSCH, then the base station sends a user equipment specific signaling to the user equipment, the user equipment specific signaling comprises the transmission mode of the PDSCH, then the base station sends the user equipment specific signaling to the user equipment, the user equipment specific signaling comprises the transmission mode of the PDSCH, correspondingly, after receiving the user equipment specific signaling, the user equipment obtains the transmission mode of the PDSCH according to the user equipment specific signaling, the corresponding relation between the transmission mode of the PDSCH and the DMRS pattern can also be predefined in the user equipment, 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 relation.

Optionally, the transmission mode of PDSCH may also be used to determine a set of any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving an MCS table of the data, sending the maximum modulation order of the data, sending the MCS table of the data, indicating a CQI table, configuring a downlink control region, configuring an SRS configuration parameter of an uplink sounding reference signal, configuring a DCI format and feeding back a feedback mode, wherein the SRS configuration parameter comprises an SRS period and a subframe offset. 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 can acquire the transmission mode of the PDSCH in the user equipment-specific signaling, and can also determine the any one or more kinds of information according to the transmission mode of the PDSCH. For a specific process of determining any one or more information by using the transmission mode of the PDSCH, reference may be made to the relevant description of the implementation process of the any one or more information indicated by the DMRS indication message in the above embodiment, and this embodiment is not described herein again.

In the fifth embodiment of the DMRS transmission method of the present invention, the DMRS indication message may be a dynamic signaling sent by the base station through the PDCCH or EPDCCH, where the dynamic signaling includes any one or more of the following information: n bit signaling, signaling for indicating redundancy version, signaling for indicating modulation coding scheme, signaling for indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein N is a natural number. Specifically, a DMRS pattern candidate set of DMRS antenna ports may be predefined, the DMRS pattern candidate set may include at least one DMRS pattern, for example, a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE10 or at least one DMRS pattern with low RE overhead occupied by a newly added DMRS according to an embodiment of the present invention, the base station may transmit the above dynamic information to the user equipment through PDCCH or EPDCCH after determining the DMRS pattern of the DMRS antenna ports from the DMRS pattern candidate set, the dynamic signaling may be used to indicate the DMRS pattern, and after the user equipment receives the dynamic signaling, the user equipment may determine whether the DMRS pattern is any one of a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE10 or any one of at least one DMRS pattern with low RE overhead occupied by a newly added DMRS according to an embodiment of the present invention, and the base station may transmit the DMRS to the user equipment according to the DMRS pattern determined by the base station, the user equipment can acquire the DMRS according to the DMRS pattern indicated by the dynamic signaling, so that the base station can select the DMRS pattern with lower RE overhead occupied by the DMRS to transmit the DMRS, and correspondingly, the user equipment can also determine the DMRS pattern with lower RE overhead occupied by the DMRS to acquire the DMRS, thereby achieving the purpose of saving RE. It should be noted that, the sending of the dynamic signaling to the user equipment by the base station through the PDCCH or EPDCCH is consistent with that in the prior art, and this embodiment is not described herein again.

Specifically, in this embodiment, the user equipment may determine the DMRS pattern according to 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 the DMRS pattern with a lower RE overhead occupied by the DMRS, and when the N-bit signaling is equal to the second preset value, the user equipment may 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 signaling indicating the redundancy version in the dynamic signaling, for example: when the redundancy version is equal to the third preset value, the user equipment can determine that the DMRS pattern is the DMRS pattern with low RE overhead occupied by the DMRS, and when the redundancy version is equal to the fourth preset value, 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 signaling indicating the MCS, for example: when the MCS belongs to a first preset range, the user equipment may determine that the DMRS pattern is a DMRS pattern with a low RE overhead occupied by the DMRS, and when the MCS belongs to a second preset range, 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 an instruction indicating an antenna port, a scrambling sequence, and the number of layers, 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 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 newly transmitted data indication signaling in the dynamic signaling, for example: when the new data indication signaling is equal to the fifth preset value, the user equipment may determine that the DMRS pattern is the DMRS pattern with a lower RE overhead occupied by the DMRS, and when the new data indication signaling is equal to the sixth preset value, the user equipment may 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 a new data indication signaling in the dynamic signaling, and specifically, when the new data indication signaling indicates that the new data is not new data or indicates that the new data is retransmission data, the user equipment may determine that the DMRS exists in a subframe where the dynamic signaling is located or a subframe indicated by the dynamic signaling.

In a sixth embodiment of the DMRS transmission method of the present invention, the DMRS indication message is downlink control information sent by the base station through the PDCCH. Specifically, a DMRS pattern candidate set of a DMRS antenna port may be predefined, where the DMRS pattern candidate set may include at least one DMRS pattern, for example, a DMRS pattern specified in LTE R10 or a DMRS pattern specified in LTE10, or at least one DMRS pattern with a lower RE overhead occupied by a newly added DMRS in the embodiment of the present invention, and after determining the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, the base station transmits downlink control information through the PDCCH, where the downlink control information may be used to indicate the DMRS pattern, and after receiving the downlink control information, in a first feasible implementation manner, the user equipment may determine, according to the downlink control information, a subframe number of a subframe where the downlink control information is located; in a second possible implementation manner, the ue may determine, according to the downlink control information, a subframe number of a subframe indicated by the downlink control information; the user equipment can also predefine the corresponding relation between the subframe number and the DMRS pattern, and then the user equipment can determine the DMRS pattern of the DMRS antenna port according to the subframe number. For example: when the subframe number is even, the user equipment may determine that the DMRS pattern is a DMRS pattern with low RE overhead occupied by the DMRS, and when the subframe number is odd, the user equipment may determine that the DMRS pattern is a DMRS pattern specified in LTE R10 or LTE R11.

Further, in a first feasible implementation manner, after the user equipment determines the subframe number of the downlink control information, the user equipment may determine whether a difference between the subframe number of the subframe where the current downlink control information is located and the subframe number of the subframe where the previous downlink control information is located is greater than a first number difference preset value, and if so, the user equipment may determine that the DMRS exists in the subframe where the current downlink control information is located; if not, 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 feasible implementation manner, after the user equipment determines the subframe number of the subframe indicated by the downlink control information, the user equipment may determine whether the difference between the subframe number of the subframe indicated by the current downlink control information and the subframe number of the subframe where the previous downlink control information is located is greater than a second number difference preset value, and if so, the user equipment determines that the DMRS exists in the subframe indicated by the current downlink control information; and if not, the user equipment determines that the DMRS does not exist in the subframe indicated by the current 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 determine the RE that performs resource mapping with the DMRS according to the determined DMRS pattern, and map the PDSCH and/or the EPDCCH to the RE that does not perform resource mapping with the DMRS, that is, perform resource mapping between the RE that does not perform resource mapping with the DMRS and the PDSCH and/or the EPDCCH, and then transmit the PDSCH and/or the EPDCCH to the user equipment.

Correspondingly, the user equipment can also acquire the mapping relation between the PDSCH and/or the EPDCCH and the RE according to the DMRS pattern, and acquire the PDSCH and/or the EPDCCH according to the mapping relation; the user equipment can determine the RE which is subjected to resource mapping with the DMRS according to the DMRS pattern, the user equipment acquires the PDSCH and/or the EPDCCH on the RE which is not subjected to resource mapping with the DMRS, namely, the operation of acquiring the PDSCH and/or the EPDCCH is not carried out on the RE occupied by the DMRS, and after the user equipment acquires the PDSCH and/or the EPDCCH, the user equipment can demodulate the PDSCH and/or the EPDCCH according to the DMRS; it should be noted that the process of demodulating PDSCH and/or EPDCCH according to DMRS may include that the user equipment measures a downlink channel according to the obtained DMRS, and the user equipment demodulates PDSCH and/or EPDCCH according to the measured downlink channel, and a specific implementation process is consistent with that in the prior art, which is not described herein again. After the user equipment acquires the DMRS according to the DMRS pattern of the DMRS antenna port, the user equipment may further perform CQI calculation according to the DMRS, and it should be noted that a process of performing CQI calculation according to the DMRS is consistent with that in the prior art, and this embodiment is not described herein again. It should be noted that, the user equipment performs the two steps of obtaining the mapping relationship between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern of the DMRS antenna port, and obtaining the PDSCH and/or the EPDCCH according to the mapping relationship after performing step 102, which is not limited in this embodiment.

Further, on the basis of the foregoing embodiments of the present invention, the base station may further determine an additional DMRS pattern for the DMRS antenna port, where the additional DMRS pattern is a position of a time-frequency resource in which a zero-power DMRS exists and/or a position of a resource element occupied by the zero-power DMRS in the time-frequency resource, the DMRS indication message sent by the base station to the UE is further used to indicate the additional DMRS pattern for the DMRS antenna port, so that the UE determines the additional DMRS pattern for the DMRS antenna port according to the DMRS indication message, or the base station sends the additional DMRS indication message to the UE, the additional DMRS indication message is used to indicate the additional DMRS pattern for the DMRS antenna port, so that the UE determines the additional DMRS pattern for the DMRS antenna port according to the additional DMRS indication message, and the base station may further perform resource mapping of the PDSCH and/or EPDCCH and RE according, specifically, the base station may determine, according to the determined DMRS pattern, REs that perform resource mapping with the DMRS and determine, according to the determined additional DMRS pattern, REs that perform resource mapping with the zero-power DMRS, map the PDSCH and/or the EPDCCH to the REs that do not perform resource mapping with the DMRS and the zero-power DMRS, that is, perform resource mapping between the REs that do not perform resource mapping with the DMRS and the zero-power DMRS and the PDSCH and/or the EPDCCH, and then transmit the PDSCH and/or the EPDCCH to the user equipment. Wherein the zero-power DMRS means that a base station can transmit a zero-power signal on an RE on which the zero-power DMRS is mapped; or, the base station may determine, according to the determined additional DMRS pattern, REs that perform resource mapping with the zero-power DMRS, map the PDSCH and/or the EPDCCH to REs that do not perform resource mapping with the zero-power DMRS, that is, perform resource mapping between the REs that do not perform resource mapping with the zero-power DMRS and the PDSCH and/or the EPDCCH, and then transmit the PDSCH and/or the EPDCCH to the user equipment. It should be noted that, in this embodiment, there is no limitation on the sequence of the base station between the step of determining the additional DMRS pattern for the DMRS antenna port and the step 201 to 203.

Correspondingly, the user equipment also determines an additional DMRS pattern of the DMRS antenna port according to the DMRS indication message, or the user equipment receives the additional DMRS indication message sent by the base station and determines the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message, the user equipment acquires the mapping relation between the PDSCH and/or the EPDCCH and the RE according to the DMRS pattern and/or the additional DMRS pattern, and acquires the PDSCH and/or the EPDCCH according to the mapping relation; specifically, the user equipment may determine, according to the DMRS pattern, REs that perform resource mapping with the DMRS and determine, according to the additional DMRS pattern, REs that perform resource mapping with the zero-power DMRS, acquire the PDSCH and/or EPDCCH on the REs that do not perform resource mapping with the DMRS and the zero-power DMRS, that is, do not perform operation of acquiring the PDSCH and/or EPDCCH on the REs occupied by the DMRS and the zero-power DMRS, and after the user equipment acquires the PDSCH and/or EPDCCH, the user equipment may demodulate the PDSCH and/or EPDCCH according to the DMRS; or, the user equipment may determine, according to the additional DMRS pattern, REs that perform resource mapping with the zero-power DMRS, acquire the PDSCH and/or the EPDCCH on the REs that do not perform resource mapping with the zero-power DMRS, that is, do not perform operation of acquiring the PDSCH and/or the EPDCCH on the REs occupied by the zero-power DMRS, and 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. Wherein the zero-power DMRS refers to that the user equipment assumes that a zero-power signal is transmitted on the RE mapped with the 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 the additional DMRS pattern of the DMRS antenna port after performing step 101; if the user equipment determines the additional DMRS pattern according to the additional DMRS indication message, the present embodiment does not limit the sequence between the step of determining the additional DMRS pattern of the DMRS antenna port and the step 201 to 203.

The method for the user equipment to determine the DMRS pattern of the DMRS antenna port and the additional DMRS pattern of the DMRS antenna port according to the DMRS indication message may be that the DMRS indication message includes a plurality of states, each of the states corresponds to one DMRS pattern of the DMRS antenna port and one additional DMRS pattern of the DMRS antenna port, and the user equipment determines the DMRS pattern of the DMRS antenna port and the additional DMRS pattern of the DMRS antenna port according to the received state of the DMRS indication message.

In the following, a DMRS indication message with a length of 1 bit is taken as an example, the DMRS indication message has 2 states, i.e., '0' and '1', and information indicated by each state is shown in table three below.

Watch III

DMRS indication messages	DMRS patterns	Additional DMRS patterns
			‘0’	DMRS pattern 1	Additional DMRS pattern 1
‘1’	DMRS pattern 2	Additional DMRS pattern 2

Wherein the DMRS pattern 1 and the DMRS pattern 2 represent different DMRS patterns, and the additional DMRS pattern 1 and the additional DMRS pattern 2 represent different additional DMRS patterns.

In the following, a DMRS indication message with a length of 2 bits is taken as an example, and the DMRS indication message has 4 states, i.e., '00', '01', '10', and '11', and information of each state indication is shown in table four.

Watch four

DMRS indication messages	DMRS patterns	Additional DMRS patterns
			‘00’	DMRS pattern 1	Additional DMRS pattern 1
‘01’	DMRS pattern 2	Additional DMRS pattern 2
			‘10’	DMRS pattern 2	Additional DMRS pattern 1
‘11’	DMRS pattern 1	Additional DMRS pattern 2

The method for the user equipment to determine the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message is consistent with the method for the user equipment to determine the DMRS pattern of the DMRS antenna port according to the DMRS indication message in each embodiment of the present invention, and the details are not repeated herein.

Because the base station can transmit the zero-power signal on the RE indicated by the additional DMRS pattern, the RE indicated by the additional DMRS pattern does not interfere with other base stations or user equipment by using the DMRS, so that the DMRS of other base stations or user equipment can be interfered, the DMRS transmission performance of other base stations or user equipment can be improved, the precision of channel estimation performed by the user equipment according to the DMRS can be improved, and the throughput of the user equipment can be improved.

Further, the base station may obtain a DMRS pattern supported by the user equipment, and in a first possible implementation manner, before the user equipment receives a DMRS indication message sent by the base station, the user equipment may select at least one DMRS pattern from a DMRS pattern candidate set, and send the selected at least one DMRS pattern to the base station through a higher layer signaling or a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH), where the DMRS pattern candidate set may include all 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 through a high layer signaling or a PUCCH or a PUSCH, where the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set, so that the base station may determine the DMRS pattern of the DMRS antenna port according to the received at least one DMRS pattern, specifically, the base station may determine the DMRS pattern of the DMRS antenna port from the received at least one DMRS pattern sent by the user equipment, and then send a DMRS indication message to the user equipment, so that the user equipment may obtain the DMRS using the DMRS pattern selected by the base station; alternatively, the base station may determine the DMRS pattern for the DMRS antenna port from the DMRS pattern candidate set, except for the at least one DMRS pattern, wherein the DMRS pattern for the DMRS antenna port determined by the base station is closer to the density of the DMRS indicated by the at least one DMRS pattern and/or the location of time-frequency resources in which the DMRS exists and/or the location of resource elements occupied by the DMRS in the time-frequency resources.

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

For example: the user equipment can select the DMRS pattern according to the moving speed of the user equipment, if the moving speed of the user equipment is smaller than a first moving speed threshold value, the moving speed of the user equipment is lower, the needed DMRS is less, and the user equipment can select the DMRS pattern with lower RE overhead occupied by the DMRS from the DMRS pattern candidate set; if the moving speed of the user equipment is greater than the second moving speed threshold, it is indicated that the moving speed of the user equipment is high, the required DMRSs are relatively many, and the user equipment may select the DMRS pattern specified in LTE R10 or LTE R11 from the DMRS pattern candidate set.

The user equipment can select at least one DMRS pattern according to the downlink channel information, if the multipath time delay expansion of the downlink channel is smaller than a first multipath time delay expansion threshold value, the frequency domain correlation of the downlink channel is higher, the needed DMRS is less, and the user equipment can select the DMRS pattern with 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 spread threshold, it is indicated that the frequency domain correlation of the downlink channel is low, the required DMRS is less, and the user equipment may select the DMRS pattern specified in LTE R10 or LTE R11 from the DMRS pattern candidate set.

The user equipment can select at least one DMRS pattern from the DMRS pattern candidate set according to the DMRS processing capability of the user equipment, and the DMRS processing capability of each user equipment can be different, so that the DMRS patterns which can be supported by each user equipment can also be different, and the user equipment can select at least one DMRS pattern which can be supported by the user equipment from the DMRS pattern candidate set according to the DMRS processing capability of the user equipment. Correspondingly, the at least one DMRS pattern received by the base station and transmitted by the user equipment may be selected by the user equipment from the DMRS pattern candidate set according to the mobile speed of the user equipment, downlink channel information, or DMRS processing capability of the user equipment. The user equipment may further select at least one DMRS pattern from the DMRS pattern candidate set according to a Rank Indicator (RI).

Further, the ue may send at least one DMRS pattern to the base station through higher layer signaling or PUCCH or PUSCH, and may include: the user equipment transmits the at least one DMRS pattern together with the rank indication to the base station through higher layer signaling or PUCCH or PUSCH. Correspondingly, the base station can receive the rank indication and at least one DMRS pattern which are sent by the user equipment through a high-level signaling or a physical uplink control channel or a physical uplink shared channel, so that the change time interval of the DMRS pattern selected by the user equipment cannot be less than that of the RI, and the base station can be ensured to determine the DMRS pattern from the effective DMRS pattern selected by the user equipment. Further, the user equipment transmitting the RI and the at least one DMRS pattern to the base station through higher layer signaling or PUCCH or PUSCH may include: the user equipment jointly encodes at least one DMRS pattern and RI; and the user equipment transmits the at least one DMRS pattern and the rank indication after the joint coding to the base station through high-layer signaling or PUCCH or PUSCH. Correspondingly, the base station receives the jointly coded RI and the at least one DMRS pattern which are sent by the user equipment through high-layer signaling or PUCCH or PUSCH, and then obtains the at least one DMRS pattern selected by the user equipment from the jointly coded RI and the at least one DMRS pattern.

In a second possible implementation manner, before the user equipment receives the DMRS indication message sent by the base station, the user equipment may report DMRS processing capability indication information to the base station, where the DMRS processing capability indication information includes a DMRS processing capability indicating the user equipment. The corresponding relation between the DMRS processing capacity and the number of the DMRS patterns and/or the DMRS patterns can be predefined, therefore, before the base station determines the DMRS patterns of the DMRS antenna ports, the base station can acquire the DMRS processing capacity of the user equipment after receiving the DMRS processing capacity indication message reported by the user equipment, and according to the corresponding relation between the DMRS processing capacity and the number of the DMRS patterns and/or the DMRS patterns, the number of the DMRS patterns which can be processed by the user equipment and/or the DMRS patterns which can be processed by the user equipment can be determined, so that the base station can determine the DMRS patterns of the DMRS antenna ports from at least one DMRS pattern which can be processed by the user equipment and then send the DMRS indication message to the user equipment, and therefore the user equipment can acquire the DM.

On the basis of the above embodiments of the present invention, because DMRS antenna ends may correspond to different application devices, and DMRS patterns that may be processed by different user devices may be different, at least two different DMRS patterns may exist in the DMRS antenna port, and these DMRS patterns may be referred to as candidate DMRS patterns of the DMRS antenna port, so that if at least two candidate DMRS patterns of the DMRS antenna port have overlapping REs in the same time-frequency resource, the same DMRS is mapped on the overlapping REs in the same time-frequency resource according to the at least two candidate DMRS patterns, and thus, the overlapping REs in the at least two candidate DMRS patterns may perform code-domain orthogonality.

Taking one subframe as an example, where one subframe includes two slots (slots), one slot is a half subframe, and the position of the RE occupied by the DMRS in the slot may be represented by (k, l), where k is a subcarrier number in the slot, and l is a number of an OFDM symbol in the slot.

The value of k can be determined by equation (1):

The value of l can be determined by equation (2):

l=l'mod2+5 （2）

Different DMRS patterns may pass through different m' and/or n_PRBAnd/or n_sAnd/or a collection of values for l'.

DMRS symbols transmitted by a DMRS antenna port p on an RE with a position (k, l) may be represented by formula (3):

wherein,is a symbol for a DMRS,r () is a pseudo-random sequence,to be predefinedWhere i ∈ {0,1,2,3 }.

At the same m', n for different DMRS patterns_PRBAnd the DMRS symbols transmitted on the RE corresponding to l' are also the same.

Fig. 7 is a schematic structural diagram of a first embodiment of a ue in the present invention, and as shown in fig. 7, the apparatus of this embodiment may include: the base station comprises a receiving module 11, a determining module 12 and an obtaining module 13, wherein the receiving module 11 is configured to receive a DMRS indication message sent by a base station, the DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port, and the DMRS pattern is a position of a time-frequency resource in which a DMRS exists and/or a position of a resource element occupied by the DMRS in the time-frequency resource;

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

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

The user equipment of this embodiment may be configured to execute the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, and reference may be made to relevant descriptions in the above embodiments for details, which are not described herein again.

Fig. 8 is a schematic structural diagram of a second embodiment of the user equipment in the present invention, as shown in fig. 8, based on the structure of the user equipment shown in fig. 7, the user equipment in this embodiment further includes a receiving module 11, 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 at least one DMRS antenna port; or receiving at least two DMRS indication messages sent by the base station, wherein each DMRS indication message is used for indicating the DMRS pattern of one DMRS antenna port. The DMRS indication message received by the receiving module 11 is used to indicate a DMRS pattern of a DMRS antenna port, and includes: the DMRS indication message is used for indicating the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, wherein the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a first possible implementation manner, the DMRS indication message received by the receiving module 11 is 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 the cyclic prefix.

Further, the cell-specific signaling received by the receiving module 11 includes a cell type corresponding to the base station; the determining module 12 is specifically configured to obtain a cell type according to the cell-specific signaling received by the receiving module 11; and determining the 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

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

Further, the ue-specific signaling received by the receiving module 11 includes a transmission mode of a physical downlink shared channel PDSCH; the determining module 12 is specifically configured to acquire the transmission mode of the PDSCH according to the ue-specific signaling received by the receiving module 11; and determining the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH. Optionally, the determining module 12 is further configured to determine, according to the transmission mode of the PDSCH, any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a third feasible implementation manner, the DMRS indication message received by the receiving module 11 is a dynamic signaling sent by the base station through 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 redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number; the determining module 12 is specifically configured to determine the 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 sent by the base station through a physical downlink control channel; the determining module 12 is specifically configured to determine, according to the downlink control information received by the receiving module 11, a subframe number of a subframe in which the downlink control information is located, or determine, according to the downlink control information received by the receiving module 11, a subframe number of a subframe indicated by the downlink control information; and determining the DMRS pattern of the DMRS antenna port according to the subframe number. Further, the determining module 12 is specifically configured to:

judging whether the difference between the subframe number of the subframe where the current downlink control information is located and the subframe number of the subframe where the last downlink control information is located is larger than a first number difference preset value, and determining the position of the time-frequency resource with the DMRS as the subframe where 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 where the last downlink control information is located is larger than a second number difference preset value, determining that the position of the time-frequency resource with the DMRS is the subframe indicated by the current downlink control information.

Further, the time-frequency resource includes: resource block pairs, resource block groups, half subframes, subframe groups, or resource block groups on a subframe group. And all resource blocks which are scheduled to the user equipment in the M time-frequency resources use the same precoding, wherein M is a natural number.

Further, in a first possible implementation manner, the user equipment of this embodiment may further include a first processing module 14, where the first processing module 14 is configured to obtain a mapping relationship between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern determined 12 by the determining module; acquiring the PDSCH and/or the EPDCCH according to the mapping relation; demodulating the PDSCH and/or the EPDCCH according to the DMRS acquired by the acquisition module 13; or, the first processing module 14 is configured to perform channel quality indication calculation according to the DMRS acquired by the acquiring module 13.

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

the receiving module 11 is further configured to receive an additional DMRS indication message sent by the base station before the second processing module 15 acquires a mapping relationship between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port;

the determining module 12 is specifically configured to determine an additional DMRS pattern for the DMRS antenna port according to the additional DMRS indication message.

Further, in a first possible implementation manner, the user equipment of this embodiment may further include: a selecting module 16 and a first transmitting module 17, wherein the selecting module 16 is configured to select at least one DMRS pattern from the DMRS pattern candidate set before the receiving module 11 receives the DMRS indication message sent by the base station; the first sending module 17 is configured to send the at least one DMRS pattern selected by the selecting module 16 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 the base station determines the 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 of the user equipment, or the downlink channel information, or the DMRS processing capability of the user equipment. The first transmitting module 17 is specifically configured to transmit the rank indication together with the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH. Preferably, the apparatus of this embodiment may further include a third processing module 18, where the third processing module 18 is configured to jointly encode the rank indication and the at least one DMRS pattern; the first sending module 17 is specifically configured to send the jointly encoded rank indication and the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH.

In a second possible implementation manner, the user equipment of this embodiment may include a second sending module 19, where the second sending module 19 is configured to report DMRS processing capability indication information to the base station before the receiving module 11 receives the DMRS indication message sent by the base station, so that the base station determines, according to the DMRS processing capability indication message, the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment.

The user equipment of this embodiment may be configured to execute the technical solution executed by the user equipment in the foregoing embodiment of the present invention, and the implementation principle and the technical effect of the user equipment are similar, which may refer to the relevant descriptions in the foregoing embodiment in detail, and are not described here again.

It should be noted that, in terms of hardware implementation, the above receiving module 11 may be a receiver or a transceiver, the above first sending module 17 and the above second sending module 19 may be a transmitter or a transceiver, and the receiving module 11, the first sending module 17 and the second sending module 19 may be integrated together to form a sending and receiving unit, which corresponds to hardware implementation as a transceiver. The 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 a hardware form or a processor independent of the user equipment, or may be stored in a memory of the user equipment in a software form, so that the processor can call and execute operations corresponding to the above modules. The processor may be a Central Processing Unit (CPU), a microprocessor, a single chip, or the like.

Fig. 9 is a schematic structural diagram of a third embodiment of the user equipment in the present invention, and as shown in fig. 9, the user equipment in this embodiment may include a receiver 21, a transmitter 22, a memory 23, and a processor 24 respectively connected to the receiver 21, the transmitter 22, and the memory 23. Of course, the user equipment may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiment of the present invention is not limited in any way here.

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

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

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 a DMRS pattern of a DMRS antenna port, includes:

receiving, by a receiver 21, one DMRS indication message transmitted 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, by a receiver 21, at least two DMRS indication messages transmitted by the base station, where each DMRS indication message is used to indicate a DMRS pattern of one DMRS antenna port.

Further, the DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port, and includes: the DMRS indication message is used for indicating the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, wherein the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining the DMRS pattern of the DMRS antenna port.

The DMRS indication message is also used for indicating any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

The DMRS indication message further comprises any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

Further, in a first possible implementation manner, the DMRS indication message is 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 the cyclic prefix. Further, the cell-specific signaling includes a cell type corresponding to the base station; the processor 24 determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, including:

the processor 24 acquires the cell type according to the cell-specific signaling;

the processor 24 determines the DMRS pattern for the DMRS antenna port according to the cell type.

Optionally, the method further comprises: processor 24 determines, based on the cell type, any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a second possible implementation manner, the DMRS indication message is a user equipment specific signaling sent by the base station through a higher layer signaling or a medium access control signaling. Further, the user equipment-specific signaling comprises a transmission mode of a Physical Downlink Shared Channel (PDSCH); the processor 24 determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, including:

the processor 24 acquires the transmission mode of the PDSCH according to the ue-specific signaling;

the processor 24 determines the DMRS pattern for the DMRS antenna port according to the transmission mode of the PDSCH.

Optionally, the method further comprises: processor 24 determines, according to the transmission mode of the PDSCH, any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a third possible implementation manner, the DMRS indication message is a dynamic signaling sent by the base station through 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 redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number; the processor 24 determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, including:

the processor 24 determines the DMRS pattern for the DMRS antenna port based on the dynamic signaling.

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

the processor 24 determines the subframe number of the subframe where the downlink control information is located according to the downlink control information, or determines the subframe number of the subframe indicated by the downlink control information according to the downlink control information;

the processor 24 determines the DMRS pattern for the DMRS antenna port based on the subframe number.

Optionally, the processor 24 determines the DMRS pattern for the DMRS antenna port according to the subframe number, including:

if the difference between the subframe number of the subframe where the current downlink control information is located and the subframe number of the subframe where the last downlink control information is located is greater than a first number difference preset value, the processor 24 determines that the position of the time-frequency resource with the DMRS is the subframe where 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 where the previous downlink control information is located is greater than a second number difference preset value, the processor 24 determines that the position of the time-frequency resource with the DMRS is the subframe indicated by the current downlink control information.

Further, in a first possible implementation manner, the method further includes:

the processor 24 acquires the mapping relation between the PDSCH and/or the EPDCCH and the resource elements 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 EPDCCH according to the DMRS; or,

processor 24 performs channel quality indication calculation based on the DMRS.

In a second possible implementation manner, the method further includes:

the processor 24 determines an additional DMRS pattern of the DMRS antenna port, wherein the additional DMRS pattern is the position of a time frequency resource with zero-power DMRS and/or the position of a resource element occupied by the zero-power DMRS in the time frequency resource;

the processor 24 acquires the mapping relation between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port;

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

Further, the processor 24 determines additional DMRS patterns for the DMRS antenna ports, including:

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

receiving, by a receiver 21, an additional DMRS indication message transmitted by the base station;

the processor 24 determines additional DMRS patterns for the DMRS antenna ports according to the additional DMRS indication message.

Further, in the first possible 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 candidate set of DMRS patterns;

and transmitting the at least one DMRS pattern to the base station through a high-layer signaling or a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) by a transmitter 22 so that the base station determines the 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 candidate set of DMRS patterns, including:

the processor 24 selects the at least one DMRS pattern 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.

Further, transmitting, by the transmitter 22, the at least one DMRS pattern to the base station through higher layer signaling or PUCCH or PUSCH includes:

transmitting, by a transmitter 22, a rank indication together with the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH.

Further, the transmitting, by the transmitter 22, the rank indication together with the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH comprises:

the processor 24 jointly encodes a rank indication and the at least one DMRS pattern;

and transmitting the jointly coded rank indication and the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH by a transmitter 22.

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

and reporting the DMRS processing capability indication information to the base station through a transmitter 22, so that the base station determines the number of the DMRS patterns which can be processed by the user equipment and/or the DMRS patterns which can be processed by the user equipment according to the DMRS processing capability indication information.

The user equipment of this embodiment may be configured to execute the technical solution executed by the user equipment in the foregoing method embodiments of the present invention, and the implementation principle and the technical effect of the technical solution are similar, which may refer to the relevant descriptions in the foregoing embodiments in detail, and are not described here again.

Fig. 10 is a schematic structural diagram of a base station according to a first embodiment of the present invention, and as shown in fig. 10, the base station according to this embodiment may include: a determining module 31 and a transmitting module 32, wherein the determining module 31 is configured to determine a DMRS pattern for a DMRS antenna port;

the sending module 32 is configured to send, to the user equipment, 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 position of a time-frequency resource in which a DMRS exists and/or a position of a 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 acquires the DMRS according to the DMRS pattern of the DMRS antenna port; and transmitting the DMRS to the user equipment according to the DMRS pattern.

The base station of this embodiment may be configured to execute the technical solution of the method embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, and reference may be made to relevant descriptions in the above embodiments for details, which are not described herein again.

Fig. 11 is a schematic structural diagram of a second embodiment of the base station of the present invention, and as shown in fig. 11, on the basis of the base station structure shown in fig. 10, in the base station of this embodiment, the sending module 32 is further specifically configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate a DMRS pattern of at least one DMRS antenna port; or at least two DMRS indication messages are sent to the user equipment, wherein each DMRS indication message is used for indicating the DMRS pattern of one DMRS antenna port. The DMRS indication message sent by the sending module 32 is used to indicate a DMRS pattern of a DMRS antenna port, and includes: the DMRS indication message comprises the density of the DMRS, the interval degree of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, and the density of the DMRS, the interval degree of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

Optionally, the DMRS indication message sent by the sending module 32 further includes any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a first possible implementation manner, the sending module 32 is specifically configured to send the cell-specific signaling to the ue through a system information block, a primary message block, a higher layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in the cyclic prefix. Further, the determining module 31 is specifically configured to determine, according to the cell type, a DMRS pattern of the DMRS antenna port; the cell-specific signaling sent by the sending module 32 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 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a second possible implementation manner, the sending module 32 is specifically configured to send the ue-specific signaling to the ue through a higher layer signaling or a media access control signaling. Further, the determining module 31 is specifically configured to determine, according to the transmission mode of the PDSCH, a DMRS pattern of the DMRS antenna port; wherein the ue-specific signaling sent by the sending module 32 includes the transmission mode of the PDSCH, so that the ue determines the transmission mode of the PDSCH according to the ue-specific signaling, and determines the 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a third feasible implementation manner, the sending module 32 is specifically configured to send a dynamic signaling to the user equipment through a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, so that the user equipment determines, according to the dynamic signaling, a DMRS pattern of the DMRS antenna port, where the dynamic signaling includes any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating Modulation Coding Scheme (MCS), signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein 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 through a 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 so that the user equipment determines, according to the downlink control information, a subframe number of a subframe indicated by the downlink control information, and determines, according to the subframe number, a DMRS pattern of the DMRS antenna port.

Further, in a first possible implementation manner, the apparatus of this embodiment may further include: a first processing module 33, where the first processing module 33 is configured to perform resource mapping between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern after the determination module 31 determines the DMRS pattern of the DMRS antenna port; the transmitting module 32 is further configured to transmit the PDSCH and/or EPDCCH to the user equipment.

In a second possible implementation manner, the apparatus of this embodiment may further include: a second processing module 34, where the determining module 31 is further configured to determine an additional DMRS pattern for the DMRS antenna port, where the additional DMRS pattern is a position of a time-frequency resource in which a zero-power DMRS exists and/or a position of a resource element occupied by the zero-power DMRS in the time-frequency resource; the second processing module 34 is configured to perform resource mapping between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern and/or the additional DMRS pattern of the DMRS antenna port determined by the determining module 31; the transmitting module 32 is further configured to transmit the PDSCH and/or EPDCCH to the user equipment.

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

the transmitting module 32 is further configured to transmit, to the user equipment, an additional DMRS indication message after the determining module 31 determines the additional DMRS pattern of the DMRS antenna port, where the additional DMRS indication message is used to indicate the additional DMRS pattern of the DMRS antenna port, so that the user equipment determines the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

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

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

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

Further, the first receiving module 35 is specifically configured to receive the rank indication and the at least one DMRS pattern, which are transmitted by the user equipment through the higher layer signaling or the PUCCH or the PUSCH.

Preferably, the first receiving module 35 is specifically configured to receive the jointly coded rank indication and the at least one DMRS pattern sent by the user equipment through the higher layer signaling or the PUCCH or the PUSCH.

In a second feasible implementation manner, the apparatus of this embodiment may further include a second receiving module 36, where the second receiving module 36 is configured to receive, before the determining module 31 determines the DMRS pattern of the DMRS antenna port, DMRS processing capability indication information reported by the user equipment; the determining module 31 is further configured to determine, according to the DMRS processing capability indication information, the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment.

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

The base station of this embodiment may be configured to implement the technical solution implemented by the base station in the foregoing embodiments of the present invention, and the implementation principle and the technical effect are similar, and reference may be made to the relevant descriptions in the foregoing embodiments for details, which are not described herein again.

It should be noted that, in terms of hardware implementation, the above sending module 32 may be a transmitter or a transceiver, the first receiving module 35 and the second receiving module 36 may be a receiver or a transceiver, and the sending module 32, the first receiving module 35 and the second receiving module 36 may be integrated together to form a sending and receiving unit, which corresponds to hardware implementation as a transceiver. The 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 a processor of the base station in a hardware form or independent of the processor of the base station, or may be stored in a memory of the base station in a software form, so that the processor can call and execute operations corresponding to the above modules. The processor can be a CPU, a microprocessor, a singlechip and the like.

Fig. 12 is a schematic structural diagram of a third embodiment of a base station of the present invention, and as shown in fig. 12, the base station of this embodiment may include a transmitter 41, a receiver 42, a memory 43, and a processor 44 respectively connected to the transmitter 41, the receiver 42, and the memory 43. Of course, the base station may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiments of the present invention are not limited in any way here.

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

the processor 44 determines a DMRS pattern for a DMRS antenna port; transmitting, by a transmitter 41, a DMRS indication message for indicating a DMRS pattern of a DMRS antenna port, including: the DMRS indication message is used for indicating a DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of a time-frequency resource with the DMRS and/or the position of a resource element occupied by the DMRS in the time-frequency resource, so that user equipment can determine the DMRS pattern of the DMRS antenna port according to the DMRS indication message and acquire the DMRS according to the DMRS pattern of the DMRS antenna port; processor 44 transmits the DMRS to the user equipment through transmitter 41 according to the DMRS pattern.

Further, the transmitting, by the transmitter 41, a DMRS indication message to the user equipment, where the DMRS indication message is used for indicating a DMRS pattern of a DMRS antenna port, includes:

transmitting, by a transmitter 41, one DMRS indication message to the user equipment, the one DMRS indication message indicating a DMRS pattern of at least one DMRS antenna port; or,

transmitting, by a transmitter 41, at least two DMRS indication messages to the user equipment, each DMRS indication message for indicating a DMRS pattern of one DMRS antenna port.

Further, the DMRS indication message comprises the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS, and the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource without the DMRS are used for determining 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

Optionally, the DMRS indication message further includes any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

In a first possible implementation manner, the sending, by the transmitter 41, the DMRS indication message to the user equipment includes: cell-specific signaling is sent by the transmitter 41 to the user equipment via a system information block, a primary message block, a higher layer signaling, a medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

Further, the processor 44 determines DMRS patterns for DMRS antenna ports, including: the processor 44 determines a DMRS pattern for a DMRS antenna port according to the cell type; the cell-specific signaling comprises 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 pattern of the DMRS antenna port according to the cell type.

In a second possible implementation manner, the sending, by the transmitter 41, the DMRS indication message to the user equipment includes: user equipment specific signalling is sent by the transmitter 41 to the user equipment by means of higher layer signalling or medium access control signalling.

Further, the processor 44 determines DMRS patterns for DMRS antenna ports, including:

the processor 44 determines a DMRS pattern of a DMRS antenna port according to a transmission mode of a Physical Downlink Shared Channel (PDSCH); wherein the UE-specific signaling comprises a transmission mode of the PDSCH, so that the UE determines the transmission mode of the PDSCH according to the UE-specific signaling and determines the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

In a third possible implementation manner, the sending, by the transmitter 41, the DMRS indication message to the user equipment includes: sending dynamic signaling to the user equipment through a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH by a transmitter 41, 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 redundancy version, signaling indicating Modulation Coding Scheme (MCS), signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein N is a natural number.

In a fourth possible implementation manner, the sending, by the transmitter 41, the DMRS indication message to the user equipment includes: and sending downlink control information to the user equipment by a transmitter 41 through a Physical Downlink Control Channel (PDCCH) so that the user equipment determines the subframe number of a subframe where the downlink control information is located according to the downlink control information, or so that the user equipment determines the subframe number of a subframe indicated by the downlink control information according to the downlink control information and determines the DMRS pattern of the DMRS antenna port according to the subframe number.

Further, in the first possible implementation manner, after the processor 44 determines the DMRS pattern of the DMRS antenna port, the method further includes:

the processor 44 performs resource mapping of the PDSCH and/or EPDCCH and resource elements according to the DMRS pattern; transmitting the PDSCH and/or EPDCCH to the user equipment through a transmitter 41.

In a second possible implementation manner, after the processor 44 determines the DMRS pattern of the DMRS antenna port, the method further includes:

the processor 44 maps resources of a PDSCH and/or an EPDCCH and resource elements according to the DMRS pattern and/or an additional DMRS pattern of the DMRS antenna port, wherein the additional DMRS pattern is the position of a time-frequency resource with zero-power DMRS and/or the position of the resource element occupied by the zero-power DMRS in the time-frequency resource;

transmitting the PDSCH and/or EPDCCH to the user equipment through a transmitter 41.

after the processor 44 determines the additional DMRS pattern for the DMRS antenna port, the method further comprises:

transmitting, by a 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 the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

Further, in the first possible implementation manner, before the processor 44 determines the DMRS pattern for the DMRS antenna port, the method further includes: receiving, by a receiver 42, at least one DMRS pattern sent by the user equipment through a higher layer signaling or a physical uplink control channel, PUCCH, or a physical uplink shared channel, PUSCH, the at least one DMRS pattern being selected by the user equipment from a candidate set of DMRS patterns;

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

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

Further, the receiving, by the receiver 42, the at least one DMRS pattern sent by the user equipment through the higher layer signaling or the PUCCH or the PUSCH includes: receiving, by a receiver 42, the at least one DMRS pattern and the rank indication transmitted by the user equipment through the higher layer signaling or PUCCH or PUSCH.

Preferably, the receiving, by the receiver 42, the rank indication and the at least one DMRS pattern sent by the user equipment through the higher layer signaling or the PUCCH or the PUSCH includes: receiving, by a receiver 42, the jointly coded rank indication and the at least one DMRS pattern sent by the user equipment through the higher layer signaling or PUCCH or PUSCH.

In a second possible implementation manner, before the processor 44 determines the DMRS pattern of the DMRS antenna port, the method further includes: receiving, by the receiver 42, DMRS processing capability indication information reported by the user equipment; the processor 44 determines the number of DMRS patterns that can be processed by the user equipment and/or the DMRS patterns that can be processed by the user equipment according to the DMRS processing capability indication information.

Still further, still include: the processor 44 determines that, if there are overlapping resource elements in the same time-frequency resource of the at least two candidate DMRS patterns of the DMRS antenna port, the same DMRS is mapped on the overlapping resource elements in the same time-frequency resource according to the at least two candidate DMRS patterns.

The base station of this embodiment may be configured to execute the technical solution executed by any base station in the foregoing method embodiments of the present invention, and the implementation principle and the technical effect are similar, and reference may be made to relevant descriptions in the foregoing embodiments for details, which are not described herein again.

Fig. 13 is a schematic structural diagram of an embodiment of the DMRS transmission system of the present invention, and as shown in fig. 13, the system of this embodiment includes: user equipment 50 and base station 60, where the user equipment 50 may adopt the structure of any apparatus embodiment in fig. 7 to fig. 9, and correspondingly, may execute the technical solution executed by any user equipment in the foregoing method embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and details may be referred to relevant descriptions in the foregoing embodiments, and are not described herein again. The base station 60 may adopt the structure of any one of the apparatus embodiments in fig. 10 to fig. 12, and accordingly, may execute the technical solution executed by any one of the base stations in the method embodiments of the present invention, and the implementation principle and the technical effect thereof are similar, and reference may be made to the relevant descriptions in the above embodiments for details, which are not described herein again.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for transmitting a demodulation reference signal (DMRS), comprising:

the user equipment acquires the DMRS according to the DMRS pattern of the DMRS antenna port;

further comprising:

2. The method of claim 1, wherein the user equipment receives a DMRS indication message transmitted by a base station, wherein the DMRS indication message is used for indicating a DMRS pattern of a DMRS antenna port, and wherein the method comprises:

3. The method according to claim 1 or 2, wherein the DMRS indication message is used for indicating a DMRS pattern of a DMRS antenna port, and comprises:

4. The method of claim 3, wherein the DMRS indication message is cell-specific signaling sent by the base station via a system information block, a primary message block, higher layer signaling, media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

5. The method of claim 4, wherein the cell-specific signaling comprises a cell type corresponding to the base station; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

6. The method of claim 3, wherein the DMRS indication message is user equipment specific signaling sent by the base station via higher layer signaling or media access control signaling.

7. The method of claim 6, wherein the user equipment specific signaling comprises a transmission mode of a Physical Downlink Shared Channel (PDSCH); the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

8. The method according to claim 4 or 6, wherein the DMRS indication message is further used for indicating any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

9. The method of claim 5, further comprising:

10. The method of claim 7, further comprising:

11. The method of claim 3, wherein the DMRS indication message is dynamic signaling sent by the base station through a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH), and the dynamic signaling comprises any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

12. The method according to claim 3, wherein the DMRS indication message is downlink control information transmitted by the base station through a physical downlink control channel; the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, and the method comprises the following steps:

13. The method of claim 12, wherein the user equipment determines the DMRS pattern for the DMRS antenna port based on the subframe number, comprising:

14. The method according to any one of claims 9 to 13, wherein the time-frequency resources comprise: resource block pairs, resource block groups, half subframes, subframe groups, or resource block groups on a subframe group.

15. The method according to claim 14, wherein all resource blocks scheduled to the user equipment in M time-frequency resources use the same precoding, and wherein M is a natural number.

16. The method of claim 15, further comprising:

17. The method of claim 16, wherein the user equipment determines an additional DMRS pattern for the DMRS antenna port, comprising:

18. The method according to any one of claims 15 to 17, wherein before the ue receives the DMRS indication message transmitted by the base station, the method further comprises:

19. The method of claim 18, wherein the user equipment selects at least one DMRS pattern from a candidate set of DMRS patterns, comprising:

20. The method of claim 19, wherein the user equipment transmits the at least one DMRS pattern to the base station through higher layer signaling or PUCCH or PUSCH, comprising:

21. The method of claim 20, wherein the user equipment sends a rank indication and the at least one DMRS pattern to the base station through the higher layer signaling or PUCCH or PUSCH, comprising:

22. The method according to any one of claims 15 to 17, wherein before the ue receives the DMRS indication message transmitted by the base station, the method further comprises:

23. A method for transmitting a demodulation reference signal (DMRS), comprising:

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

the base station transmits the DMRS to the user equipment according to the DMRS pattern;

after the base station determines the DMRS pattern of the DMRS antenna port, the method further comprises the following steps:

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

24. The method of claim 23, wherein the base station transmits a DMRS indication message to the user equipment, the DMRS indication message indicating a DMRS pattern for a DMRS antenna port, comprising:

25. The method according to claim 23 or 24, wherein the DMRS indication message is used to indicate a DMRS pattern for a DMRS antenna port, and comprises:

26. The method of claim 25, wherein the base station transmits a DMRS indication message to the user equipment, comprising:

27. The method of claim 26, wherein the base station determines the DMRS pattern for the DMRS antenna port, comprising:

28. The method of claim 25, wherein the base station transmits a DMRS indication message to the user equipment, comprising:

29. The method of claim 28, wherein the base station determines the DMRS pattern for the DMRS antenna port, comprising:

30. The method of claim 26 or 28, wherein the DMRS indication message is further used to indicate any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

31. The method of claim 27, wherein the cell type is further used to determine any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

32. The method of claim 29, wherein the transmission mode of the PDSCH is further used to determine any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

33. The method of claim 25, wherein the base station transmits a DMRS indication message to the user equipment, comprising:

34. The method of claim 25, wherein the base station transmits a DMRS indication message to the user equipment, comprising:

35. The method according to any of claims 31-34, wherein the time-frequency resources comprise: resource block pairs, resource block groups, half subframes, subframe groups, or resource block groups on a subframe group.

36. The method according to claim 35, wherein all resource blocks scheduled to the ue in M time-frequency resources use the same precoding, and wherein M is a natural number.

37. The method of claim 36, further comprising:

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

38. The method of claim 37, wherein the DMRS indication message is further used to indicate an additional DMRS pattern for the DMRS antenna port, such that the user equipment determines the additional DMRS pattern for the DMRS antenna port based on the DMRS indication message; or,

39. The method according to any of claims 36 to 38, wherein prior to the base station determining the DMRS pattern for the DMRS antenna port, further comprising:

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

40. The method of claim 39, wherein the at least one DMRS pattern is selected by the user equipment from the candidate set of DMRS patterns based on a mobility speed or downlink channel information of the user equipment or a DMRS processing capability of the user equipment.

41. The method of claim 40, wherein the base station receives at least one DMRS pattern sent by the user equipment via higher layer signaling or PUCCH or PUSCH, comprising:

42. The method of claim 41, wherein the base station receiving the rank indication and the at least one DMRS pattern sent by the user equipment via the higher layer signaling or PUCCH or PUSCH comprises:

43. The method according to any of claims 36 to 38, wherein prior to the base station determining the DMRS pattern for the DMRS antenna port, further comprising:

44. The method of claim 43, further comprising:

45. A user device, comprising:

an obtaining module, configured to obtain the DMRS according to the DMRS pattern of the DMRS antenna port determined by the determining module;

further comprising:

46. The UE of claim 45, wherein the receiving module is specifically configured to:

47. The user equipment as claimed in claim 45 or 46, wherein the DMRS indication message received by the receiving module is used for indicating DMRS pattern of DMRS antenna port, comprising:

48. The UE of claim 47, wherein the DMRS indication message received by the receiving module is cell-specific signaling sent by the base station via a system information block, a primary message block, higher layer signaling, media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

49. The UE of claim 48, wherein the cell-specific signaling received by the receiving module comprises a cell type corresponding to the BS;

50. The UE of claim 47, wherein the DMRS indication message received by the receiving module is UE-specific signaling sent by the base station via higher layer signaling or media access control signaling.

51. The UE of claim 50, wherein the UE-specific signaling received by the receiving module comprises a transmission mode of a Physical Downlink Shared Channel (PDSCH);

52. The user equipment as claimed in claim 48 or 50, wherein the DMRS indication message received by the receiving module is further used for indicating any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

53. The UE of claim 49, wherein the determining module is further configured to determine any one or more of the following information according to the cell type: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

54. The UE of claim 51, 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: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

55. The UE of claim 47, wherein the DMRS indication message received by the receiving module is dynamic signaling sent by the base station via a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH), and the dynamic signaling comprises any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating modulation coding scheme, signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indicating signaling, wherein N is a natural number;

56. The UE of claim 47, wherein the DMRS indication message received by the receiving module is downlink control information transmitted by the base station via a physical downlink control channel;

57. The UE of claim 56, wherein the determining module is specifically configured to:

58. The UE of any one of claims 53 to 57, wherein the time-frequency resources comprise: resource block pairs, resource block groups, half subframes, subframe groups, or resource block groups on a subframe group.

59. The UE of claim 58, wherein all resource blocks scheduled to the UE in M of the time-frequency resources use the same precoding, and wherein M is a natural number.

60. The user equipment of claim 59, further comprising a second processing module;

61. The UE of claim 60, wherein the determining module is specifically configured to determine the additional DMRS pattern for the DMRS antenna port according to the DMRS indication message before the second processing module obtains the mapping relationship between the PDSCH and/or the EPDCCH and the resource elements according to the DMRS pattern and/or the additional DMRS pattern for the DMRS antenna port; or,

62. The user equipment of any one of claims 59 to 61, further comprising:

63. The user equipment of claim 62, wherein the selecting module is specifically configured to select the at least one DMRS pattern from the candidate set of DMRS patterns according to a mobility speed or downlink channel information of the user equipment or a DMRS processing capability of the user equipment.

64. The user equipment of claim 63, wherein the first transmitting module is further configured to transmit a rank indication to the base station together with the at least one DMRS pattern via the higher layer signaling or PUCCH or PUSCH.

65. The user equipment of claim 64, further comprising:

66. The user equipment of any one of claims 59 to 61, further comprising:

67. A base station, comprising:

a determining module for determining a DMRS pattern of a DMRS antenna port;

a sending module, configured to send a DMRS indication message to a 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 position of a time-frequency resource in which a DMRS exists and/or a position of a 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 acquires the DMRS according to the DMRS pattern of the DMRS antenna port; and transmitting the DMRS to the user equipment according to the DMRS pattern;

further comprising:

68. The base station of claim 67, wherein the sending module is specifically configured to:

69. The base station according to claim 67 or 68, wherein the DMRS indication message transmitted by the transmitting module is used for indicating the DMRS pattern of the DMRS antenna port, comprising

70. The base station of claim 69, wherein the sending module is specifically configured to send cell-specific signaling to the UE via a system information block, a primary message block, higher layer signaling, media access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

71. The base station of claim 70, wherein the means for determining is configured to determine the DMRS pattern for the DMRS antenna port based on a cell type;

72. The base station of claim 69, wherein the sending module is specifically configured to send UE-specific signaling to the UE via higher layer signaling or media access control signaling.

73. The base station according to claim 72, wherein the determining module is specifically configured to determine the DMRS pattern for the DMRS antenna port according to a transmission mode of a Physical Downlink Shared Channel (PDSCH);

74. The base station of claim 70 or 72, wherein the DMRS indication message transmitted by the transmitting module is further used for indicating any one or more of the following information: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

75. The base station of claim 71, wherein the cell type is further used to determine any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

76. The base station of claim 73, wherein the transmission mode of the PDSCH is further used to determine any one or more of the following: the method comprises the steps of receiving a maximum modulation order of data, receiving a modulation coding scheme table of the data, sending the maximum modulation order of the data, sending the modulation coding scheme table of the data, indicating a channel quality table, configuring a downlink control area, configuring a table of uplink sounding reference signal configuration parameters, configuring a downlink control information format and a feedback mode, wherein the sounding reference signal configuration parameters comprise a period and a subframe offset of a sounding reference signal.

77. The base station of claim 69, wherein the sending module is specifically configured to send dynamic signaling to the user equipment through a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH), so that the user equipment determines the DMRS pattern of the DMRS antenna port according to the dynamic signaling, and the dynamic signaling includes any one or more of the following information: n bit signaling, signaling indicating redundancy version, signaling indicating Modulation Coding Scheme (MCS), signaling indicating number of antenna ports, scrambling code sequence and layer number, and newly transmitted data indication signaling, wherein N is a natural number.

78. The base station according to claim 69, wherein the transmitting module is specifically configured to transmit downlink control information to the user equipment through a 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 so that the user equipment determines, according to the downlink control information, a subframe number of a subframe indicated by the downlink control information, and determines, according to the subframe number, the DMRS pattern of the DMRS antenna port.

79. The base station of any one of claims 75 to 78, wherein the time-frequency resources comprise: resource block pairs, resource block groups, half subframes, subframe groups, or resource block groups on a subframe group.

80. The base station according to claim 79, wherein all resource blocks scheduled to said user equipment in M of said time-frequency resources use the same precoding, and wherein M is a natural number.

81. The base station of claim 80, further comprising a second processing module;

82. The base station of claim 81, wherein the DMRS indication message is further configured to indicate an additional DMRS pattern for the DMRS antenna port, such that the user equipment determines the additional DMRS pattern for the DMRS antenna port based on the DMRS indication message; or,

83. The base station of any one of claims 80 to 82, further comprising:

84. The base station of claim 83, wherein the at least one DMRS pattern is selected by the user equipment from the candidate set of DMRS patterns based on a mobility speed or downlink channel information of the user equipment or a DMRS processing capability of the user equipment.

85. The base station of claim 84, wherein the first receiving module is configured to receive a rank indication and the at least one DMRS pattern sent by the user equipment via the higher layer signaling or PUCCH or PUSCH.

86. The base station of claim 85, wherein the first receiving module is configured to receive the jointly coded rank indication and the at least one DMRS pattern sent by the UE via the higher layer signaling or the PUCCH or PUSCH.

87. The base station of any one of claims 80 to 82, further comprising:

88. The base station of claim 87, further comprising: