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

Abstract

The present invention provides a demodulation reference signal (DMRS) transmission method, user equipment and base station. The method includes: the user equipment receives a DMRS indication message sent by the base station, and the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port. The DMRS pattern is The position of the time-frequency resource where the DMRS exists and/or the position of the resource element (RE) occupied by the DMRS in the time-frequency resource (101); the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message (102); the user equipment The DMRS is acquired according to the DMRS pattern of the DMRS antenna port (103). With the present invention, the base station sends DMRS to the user equipment according to the DMRS pattern with low DMRS overhead, and the user equipment acquires DMRS according to the DMRS pattern with low overhead, thereby realizing the increase of REs that can transmit valid data when the DMRS overhead is low, Improved RE utilization and data transfer rate.

Description

Demodulation reference signal transmission method, user equipment and base station

technical field

Embodiments of the present invention relate to communication technologies, and in particular to a demodulation reference signal (Demodulation Reference Signal, DMRS for short) transmission method, user equipment, and a base station.

Background technique

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

In the prior art, the base station carries the DMRS in the Resource Element (RE) of the resource block (RB) pair according to the DMRS pattern of the DMRS antenna port specified in the preset LTE protocol, and then sends For the user equipment, the user equipment obtains the DMRS according to the preset DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of the RE occupied by the DMRS in the RB pair. For example, as shown in Figure 1, R7 represents the RE occupied by the DMRS, and The REs not bearing the DMRS may be used to bear the data sent by the base station to the UE.

However, in the prior art, base stations with a small coverage area transmit DMRS according to the DMRS pattern of the DMRS antenna port specified in the LTE protocol, which makes the RE overhead occupied by the DMRS larger, for example, the overhead occupation can be 7%, which reduces the utilization of REs.

Contents of the invention

The demodulation reference signal transmission method, user equipment and base station provided by the present invention are used to reduce the overhead of REs occupied by DMRS and improve the utilization ratio of REs.

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

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

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

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 user equipment receives 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, including:

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 at least one DMRS antenna port; or,

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

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

The DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource where there is no DMRS, wherein the density of the DMRS, the interval of the DMRS, the position of the time-frequency resource of the DMRS The bitmap code and/or the position of the time-frequency resource where the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

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

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

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

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

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

With reference to the fifth possible implementation of the first aspect, in the sixth possible implementation of the first aspect, the user equipment-specific signaling includes a transmission mode of a physical downlink shared channel PDSCH; then the user equipment According to the DMRS indication message, determining the DMRS pattern of the DMRS antenna port includes:

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

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 of the first aspect or the fifth possible implementation of the first aspect, in a seventh possible implementation of the first aspect, the DMRS indication message is also used to indicate the following Any one or more information: the maximum modulation order of received data, the modulation and coding scheme table of received data, the maximum modulation order of transmitted data, the modulation and coding scheme table of transmitted data, the channel quality indication table, the downlink control area configuration, A table of uplink sounding reference signal configuration parameters, a downlink control information format and a feedback mode, where the sounding reference signal configuration parameters include the period and subframe offset of the sounding reference signal.

In combination with the fourth possible implementation of the first aspect, the eighth possible implementation of the first aspect further includes:

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

In combination with the sixth possible implementation of the first aspect, the ninth possible implementation of the first aspect further includes:

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

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

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 of the first aspect or the second possible implementation of the first aspect, in an eleventh possible implementation of the first aspect, the DMRS indication message is The downlink control information sent by the base station through the physical downlink control channel; then the user equipment determines the DMRS pattern of the DMRS antenna port according to the DMRS indication message, including:

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 ;

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 user equipment determines the DMRS pattern of the DMRS antenna port according to the subframe number, include:

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 the first number difference preset value, the user equipment determines that the DMRS exists The location of the time-frequency resource 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 last downlink control information is located is greater than the second number difference preset value, the user equipment determines that the DMRS exists The location of the time-frequency resource is the subframe indicated by the current downlink control information.

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

In combination with the first aspect or any one of the first to thirteenth possible implementations of the first aspect, in the fourteenth possible implementation of the first aspect, the M time-frequency resources All resource blocks scheduled for the user equipment use the same precoding, and the M is a natural number.

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

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

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

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

The user equipment performs CQI calculation according to the DMRS.

In combination with the first aspect or any one possible implementation manner of the first to fourteenth implementation manners of the first aspect, the sixteenth possible implementation manner of the first aspect further includes:

The user equipment determines an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is a position of a time-frequency resource where a zero-power DMRS exists and/or resource elements occupied by the zero-power DMRS are in the time-frequency resource s position;

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

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

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

A sixteenth possible implementation manner of the first aspect. In the seventeenth possible implementation manner of the first aspect, the user equipment determining an additional DMRS pattern of the DMRS antenna port includes:

The user equipment determines the 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;

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

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

The user equipment selects at least one DMRS pattern from the DMRS pattern candidate set;

The user equipment sends the at least one DMRS pattern to the base station 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 antenna according to the at least one DMRS pattern The DMRS pattern of the port.

With reference to the eighteenth possible implementation manner of the first aspect, in the nineteenth possible implementation manner of the first aspect, the user equipment selects at least one DMRS pattern from the DMRS pattern candidate set, including:

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

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 user equipment uses the at least A DMRS pattern is sent to the base station through high layer signaling or PUCCH or PUSCH, including:

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

With reference to the twentieth possible implementation manner of the first aspect, in a twenty-first possible implementation manner of the first aspect, the user equipment transmits the rank indication and the at least one DMRS pattern through the high layer signaling or PUCCH or PUSCH sent to the base station, including:

The user equipment jointly encodes the rank indication and the at least one DMRS pattern;

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

With reference to the first aspect or any one possible implementation manner of the first to seventeenth implementation manners of the first aspect, in a twenty-second possible implementation manner of the first aspect, the user equipment receives the Before the DMRS indication message, also include:

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

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

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

The base station sends a DMRS indication message to the user equipment, the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the resource occupied by the DMRS The position of the element 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 obtains the DMRS according to the DMRS pattern of the DMRS antenna port;

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

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

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

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

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

The DMRS indication message includes DMRS density, DMRS interval, DMRS bitmap code and/or the location of time-frequency resources where there is no DMRS, the DMRS density, DMRS interval, and the DMRS bitmap The code and/or the position of the time-frequency resource without DMRS is used to determine the DMRS pattern of the DMRS antenna port.

With reference to the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect, in a third possible implementation of the second aspect, the base station sends to the user equipment DMRS indication message, including:

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

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

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

Wherein, the cell-specific signaling includes the 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 DMRS pattern of the antenna port.

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

The base station sends user equipment specific signaling to the user equipment through high layer signaling or media access control signaling.

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

The base station determines the DMRS pattern of the DMRS antenna port according to the transmission mode of the physical downlink shared channel PDSCH;

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

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

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

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

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

The base station sends dynamic signaling to the user equipment through the physical downlink control channel PDCCH or the 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, so The above dynamic signaling includes any one or more of the following information: N-bit signaling, signaling indicating redundancy version, signaling indicating modulation and coding scheme MCS, signaling indicating the number of antenna ports, scrambling code sequence and layer number Instructions and newly transmitted data indication signaling, where 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 base station sends the The user equipment sends a DMRS indication message, including:

The base station sends downlink control information to the user equipment through the physical downlink control channel PDCCH, so that the user equipment determines the subframe number of the 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 the 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 possible implementation manner of the first to eleventh implementation manners of the second aspect, in a twelfth possible implementation manner of the second aspect, the time-frequency resources include: resources A pair of blocks, a group of resource blocks, a half subframe, a subframe, a group of subframes, or a group of resource blocks on a group of subframes.

In combination with the second aspect or any one of the first to twelfth possible implementations of the second aspect, in the thirteenth possible implementation of the second aspect, the M time-frequency resources All resource blocks scheduled for the user equipment use the same precoding, and the M is a natural number.

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

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

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

In combination with the second aspect or any one possible implementation manner of the first to thirteenth implementation manners of the second aspect, the fifteenth possible implementation manner of the second aspect further includes:

determining, by the base station, additional DMRS patterns for the DMRS antenna ports;

The base station performs resource mapping between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern of the DMRS antenna port and/or an additional DMRS pattern, where the additional DMRS pattern is the location and/or location of time-frequency resources where zero-power DMRS exists The position of the resource element occupied by the zero-power DMRS in the time-frequency resource;

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

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 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,

After the base station determines the additional DMRS pattern of the DMRS antenna port, it further includes:

The base station sends an additional DMRS indication message to the user equipment, 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 DMRS according to the additional DMRS indication message Additional DMRS patterns for antenna ports.

Combining the second aspect or any one of the first to thirteenth implementations of the second aspect. Combining the second aspect or any one of the first to sixteenth implementations of the second aspect. Implementation manner, in the seventeenth possible implementation manner of the second aspect, before the base station determines the DMRS pattern of the DMRS antenna port, it further includes:

The base station receives at least one DMRS pattern sent by the user equipment through high-level signaling or a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, and the at least one DMRS pattern is selected by the user equipment from a DMRS pattern candidate set of;

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

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

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 base station receives the user equipment At least one DMRS pattern sent through higher layer signaling or PUCCH or PUSCH, including:

The base station receives the rank indication and the at least one DMRS pattern sent by the user equipment through the high layer signaling or the 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 base station receives the rank sent by the user equipment through the high layer signaling or the PUCCH or PUSCH indicating and said at least one DMRS pattern, comprising:

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

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

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

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

In combination with the second aspect or any one possible implementation manner of the first to twenty-first implementation manners of the second aspect, the twenty-second possible implementation manner of the second aspect further includes:

If at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, then according to the at least two candidate DMRS patterns on the overlapping resource elements in the same time-frequency resource Map the same DMRS.

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

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

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

An acquiring module, configured to acquire the DMRS according to the DMRS pattern of the DMRS antenna port determined by the determining module.

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

Receive a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate the DMRS pattern of at least one DMRS antenna port; or,

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

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

The DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource where there is no DMRS, wherein the density of the DMRS, the interval of the DMRS, the position of the time-frequency resource of the DMRS The bitmap code and/or the position of the time-frequency resource where the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

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

With reference to the third possible implementation of the third aspect, in a fourth possible implementation 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 acquire a cell type according to the cell-specific signaling received by the receiving module; and determine the DMRS pattern of the DMRS antenna port according to the cell type.

With reference to the third aspect or the first possible implementation of the third aspect or the second possible implementation of the third aspect, in a fifth possible implementation of the third aspect, the receiving module receives The DMRS indication message is user equipment-specific signaling sent by the base station through high-layer signaling or media access control signaling.

With reference to the fifth possible implementation of the third aspect, in a sixth possible implementation 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 the transmission mode of the PDSCH according to the UE-specific signaling received by the receiving module; and determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

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

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

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

With reference to the third aspect or the first possible implementation of the third aspect or the second possible implementation of the third aspect, in a tenth possible implementation of the third aspect, the receiving module receives The DMRS indication message is a dynamic signaling sent by the base station through the physical downlink control channel PDCCH or the enhanced physical downlink control channel EPDCCH, and the dynamic signaling includes any one or more of the following information: N-bit signaling, indication Redundant version signaling, signaling indicating the modulation and coding scheme, signaling indicating the number of antenna ports, scrambling code sequences, and layer numbers, and new data indicating signaling, where 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 of the third aspect or the second possible implementation of the third aspect, in the eleventh possible implementation of the third aspect, the receiving module receives The DMRS indication message 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, the subframe number of the subframe where the downlink control information is located, or, according to the downlink control information received by the receiving module, determining the subframe number of the 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 that 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 the first number difference preset value, then determine that the time-frequency resource with DMRS exists The position of is the subframe where the current downlink control information is located; or,

Judging that 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 the second number difference preset value, then determine the time frequency at which the DMRS exists The location of the resource is the subframe indicated by the current downlink control information.

In combination with the third aspect or any of the first to twelfth possible implementation manners of the third aspect, in the thirteenth possible implementation manner of the third aspect, the time-frequency resources include: resources A pair of blocks, a group of resource blocks, a half subframe, a subframe, a group of subframes, or a group of resource blocks on a group of subframes.

In combination with the third aspect or any one of the first to thirteenth possible implementations of the third aspect, in the fourteenth possible implementation of the third aspect, the M time-frequency resources All resource blocks scheduled for the user equipment use the same precoding, and the M is a natural number.

In combination with the third aspect or any one of the first to fourteenth possible implementation manners of the third aspect, the fifteenth possible implementation manner of the third aspect further includes:

The first processing module is configured to obtain the mapping relationship between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern determined by the determining module; obtain the PDSCH and/or EPDCCH according to the mapping relationship; according to the The DMRS obtained by the obtaining module demodulates the PDSCH and/or EPDCCH; or,

The first processing module is configured to perform channel quality indicator (CQI) calculation according to the DMRS obtained by the obtaining module.

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

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

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

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

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

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

In combination with the third aspect or any one of the first to seventeenth possible implementations of the third aspect, the eighteenth possible implementation of the third aspect 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;

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

With reference to the eighteenth possible implementation manner of the third aspect, in the nineteenth possible implementation manner of the third aspect, the selecting module is specifically configured to: selecting the at least one DMRS pattern from the DMRS pattern candidate set according to the DMRS processing capability of the user equipment.

In combination with the eighteenth possible implementation of the third aspect or the nineteenth possible implementation of the third aspect, in the twentieth possible implementation of the third aspect, the first sending module specifically uses and sending the rank indication and the at least one DMRS pattern to the base station through the high layer signaling or PUCCH or PUSCH.

In combination with the twentieth possible implementation of the third aspect, the twenty-first possible implementation of the third aspect further includes:

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

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

In combination with the third aspect or any one of the first to twentieth possible implementations of the third aspect, the twenty-first possible implementation of the third aspect further includes:

The second sending module is 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 the user according to the DMRS processing capability indication message The number of DMRS patterns that the device can process and/or the DMRS patterns that the user equipment can process.

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

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

A sending module, configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, where the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the DMRS occupies The position of the resource element 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 sending 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:

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

Send at least two DMRS indication messages to the user equipment, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

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

The DMRS indication message includes DMRS density, DMRS interval, DMRS bitmap code and/or the location of time-frequency resources where there is no DMRS, the DMRS density, DMRS interval, and the DMRS bitmap The code and/or the position of the time-frequency resource without DMRS is used to determine the DMRS pattern of the DMRS antenna port.

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

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

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

With reference to the fourth aspect or the first possible implementation of the fourth aspect or the second possible implementation of the fourth aspect, in a fifth possible implementation of the fourth aspect, the sending module is specifically configured to Send user equipment-specific signaling to the user equipment through high-level signaling or media access control signaling.

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

Wherein, the user equipment-specific signaling sent by the sending module includes the transmission mode of the PDSCH, so that the user equipment determines the transmission mode of the PDSCH according to the user equipment-specific signaling, and according to the transmission mode of the PDSCH The transmission mode of the PDSCH is determined, and the DMRS pattern of the DMRS antenna port is determined.

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

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

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

With reference to the fourth aspect or the first possible implementation of the fourth aspect or the second possible implementation of the fourth aspect, in a tenth possible implementation of the fourth aspect, the sending module is specifically configured to Send dynamic signaling to the user equipment through the physical downlink control channel PDCCH or 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 The order includes any one or more of the following information: N-bit signaling, signaling indicating the redundancy version, signaling indicating the modulation and coding scheme MCS, signaling indicating the number of antenna ports, scrambling code sequence and layer number, new Data transmission indication signaling, where N is a natural number.

In combination with 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 specifically uses Sending downlink control information to the user equipment through the physical downlink control channel PDCCH, so that the user equipment determines the subframe number of the subframe where the downlink control information is located according to the downlink control information, or so that the The user equipment determines the subframe number of the 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 fourth aspect or any of the possible implementation manners from the first to the eleventh implementation manners of the fourth aspect, in a twelfth possible implementation manner of the fourth aspect, the time-frequency resources include: resources A pair of blocks, a group of resource blocks, a half subframe, a subframe, a group of subframes, or a group of resource blocks on a group of subframes.

In combination with the fourth aspect or any of the first to twelfth possible implementations of the fourth aspect, in the thirteenth possible implementation of the fourth aspect, the M time-frequency resources All resource blocks scheduled for the user equipment use the same precoding, and the M is a natural number.

In combination with the fourth aspect or any one of the first to thirteenth possible implementation manners of the fourth aspect, the fourteenth possible implementation manner of the fourth aspect further includes:

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

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

In combination with the fourth aspect or any one possible implementation manner of the first to thirteenth implementation manners of the fourth aspect, in the fifteenth possible implementation manner of the fourth aspect, a second processing module is further included;

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

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

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

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

The sending module is further configured to send an additional DMRS indication message to the user equipment after the determination module determines the additional DMRS pattern of the DMRS antenna port, the additional DMRS indication message is used to indicate the DMRS antenna port An additional DMRS pattern, so that the user equipment determines an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

In combination with the fourth aspect or any one of the first to sixteenth possible implementations of the fourth aspect, the seventeenth possible implementation of the fourth aspect further includes:

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

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

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

In combination with the seventeenth possible implementation of the fourth aspect or the eighteenth possible implementation of the fourth aspect, in the nineteenth possible implementation of the fourth aspect, the first receiving module specifically uses for receiving the rank indication and the at least one DMRS pattern sent by the user equipment through the high layer signaling or the PUCCH or PUSCH.

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

In combination with the fourth aspect or any one of the first to sixteenth possible implementations of the fourth aspect, the twenty-first possible implementation of the fourth aspect further includes:

The second receiving module is configured to receive the 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 the number of DMRS patterns that the user equipment can process and/or the DMRS patterns that the user equipment can process according to the DMRS processing capability indication information.

Combining the fourth aspect or any one of the first to twenty-first possible implementations of the fourth aspect, the twenty-second possible implementation of the fourth aspect further includes:

A third processing module, 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, then according to the at least two candidate DMRS patterns in the same time-frequency resource, The same DMRS is mapped to overlapping resource elements in frequency resources.

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

The receiver is configured to receive a DMRS indication message sent by the base station, the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the resource occupied by the DMRS The position of the element in the time-frequency resource;

The processor is configured to determine the DMRS pattern of the DMRS antenna port according to the DMRS indication message received by the receiver; and acquire the DMRS according to the DMRS pattern of the DMRS antenna port determined by the determining module.

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

Receive a DMRS indication message sent by the base station, where the DMRS indication message is used to indicate the DMRS pattern of at least one DMRS antenna port; or,

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

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

The DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource where there is no DMRS, wherein the density of the DMRS, the interval of the DMRS, the position of the time-frequency resource of the DMRS The bitmap code and/or the position of the time-frequency resource where the DMRS does not exist is used to determine the DMRS pattern of the DMRS antenna port.

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

With reference to the third possible implementation of the fifth aspect, in a fourth possible implementation 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 acquire a cell type according to the cell-specific signaling received by the receiver; and determine a DMRS pattern of the DMRS antenna port according to the cell type.

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

With reference to the fifth possible implementation of the fifth aspect, in a sixth possible implementation of the fifth aspect, the user equipment-specific signaling received by the receiver includes a transmission mode of a physical downlink shared channel PDSCH ;

The processor is specifically configured to acquire the transmission mode of the PDSCH according to the UE-specific signaling received by the receiver; and determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

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

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

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 any one or more of the following according to the transmission mode of the PDSCH Information: maximum modulation order of received data, modulation and coding scheme table of received data, maximum modulation order of transmitted data, modulation and coding scheme table of transmitted data, channel quality indication table, downlink control area configuration, uplink sounding reference signal configuration A table of parameters, a format of downlink control information and a feedback mode, the configuration parameters of the sounding reference signal include the period and subframe offset of the 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, all the The DMRS indication message is a dynamic signaling sent by the base station through the physical downlink control channel PDCCH or the enhanced physical downlink control channel EPDCCH, and the dynamic signaling includes any one or more of the following information: N-bit signaling, indication Redundant version signaling, signaling indicating the modulation and coding scheme, signaling indicating the number of antenna ports, scrambling code sequences, and layer numbers, and new data indicating signaling, where N is a natural number;

The processor is specifically configured to determine the DMRS pattern of the DMRS antenna port according to 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 receiver receives The DMRS indication message 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, the subframe number of the subframe where the downlink control information is located, or, according to the downlink control information received by the receiving module, determining the subframe number of the 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:

Judging that 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 the first number difference preset value, then determine that the time-frequency resource with DMRS exists The position of is the subframe where the current downlink control information is located; or,

Judging that 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 the second number difference preset value, then determine the time frequency at which the DMRS exists The location of the resource is the subframe indicated by the current downlink control information.

In combination with the fifth aspect or any of the first to twelfth possible implementation manners of the fifth aspect, in the thirteenth possible implementation manner of the fifth aspect, the time-frequency resources include: resources A pair of blocks, a group of resource blocks, a half subframe, a subframe, a group of subframes, or a group of resource blocks on a group of subframes.

In combination with the fifth aspect or any of the first to thirteenth possible implementations of the fifth aspect, in the fourteenth possible implementation of the fifth aspect, the M time-frequency resources All resource blocks scheduled for the user equipment use the same precoding, and the M is a natural number.

With reference to the fifth aspect or any one possible implementation manner 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: The DMRS pattern acquires a mapping relationship between PDSCH and/or EPDCCH and resource elements; acquires the PDSCH and/or EPDCCH according to the mapping relationship; demodulates 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 obtained by the obtaining module.

With reference to the fifth aspect or any one possible implementation manner of the first to fourteenth implementation manners of the fifth aspect, in a sixteenth possible implementation manner of the fifth aspect, the processor is further configured to determine The additional DMRS pattern of the DMRS antenna port, the additional DMRS pattern is the position of the time-frequency resource where there is a zero-power DMRS and/or the position of the resource element occupied by the zero-power DMRS in the time-frequency resource; and according to The DMRS pattern and/or additional DMRS pattern of the DMRS antenna port obtains the mapping relationship between PDSCH and/or EPDCCH and resource elements; according to the mapping relationship, obtains the PDSCH and/or EPDCCH; and demodulates according to the DMRS The PDSCH and/or EPDCCH.

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

The receiver is further configured to receive the additional DMRS sent by the base station before the processor obtains the mapping relationship between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern and/or additional DMRS pattern of the DMRS antenna port. instruction message;

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

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

The user equipment also includes: a transmitter;

The transmitter is configured to send the at least one DMRS pattern selected by the processor to the base station through high-level signaling or a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, so that the base station according to the At least one DMRS pattern determines the DMRS pattern of the DMRS antenna port.

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, according to the moving speed of the user equipment or the downlink channel information or the selecting the at least one DMRS pattern from the DMRS pattern candidate set according to the 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 use The rank indication and the at least one DMRS pattern are sent to the base station through the high layer signaling or PUCCH or PUSCH.

With reference to the twentieth 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 the rank indication and the at least one DMRS pattern ;

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

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

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

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

A transmitter, configured to send a DMRS indication message to the user equipment, where the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, where the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the DMRS occupies The position of the resource element 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 sending 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:

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

Send at least two DMRS indication messages to the user equipment, each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

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

The DMRS indication message includes DMRS density, DMRS interval, DMRS bitmap code and/or the location of time-frequency resources where there is no DMRS, the DMRS density, DMRS interval, and the DMRS bitmap The code and/or the position of the time-frequency resource without DMRS is used to determine the DMRS pattern of the DMRS antenna port.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect or the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the transmitter is specifically used to Sending the cell-specific signaling to the user equipment through a system information block, a master message block, high-level signaling, medium access control signaling, a set sequence in a cyclic prefix, or a set scrambling code in a cyclic prefix.

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

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

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect or the second possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the transmitter is specifically used to Send user equipment-specific signaling to the user equipment through high-level signaling or media access control signaling.

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

Wherein, the user equipment-specific signaling sent by the transmitter includes the transmission mode of the PDSCH, so that the user equipment determines the transmission mode of the PDSCH according to the user equipment-specific signaling, and according to the transmission mode of the PDSCH The transmission mode of the PDSCH is determined, and the DMRS pattern of the DMRS antenna port is determined.

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

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

With reference to the sixth possible implementation of the sixth aspect, in a ninth possible implementation of the sixth aspect, the transmission mode of the PDSCH is further used to determine any one or more of the following information: Maximum modulation order, modulation and coding scheme table of received data, maximum modulation order of transmitted data, modulation and coding scheme table of transmitted data, channel quality indication table, downlink control area configuration, uplink sounding reference signal configuration parameter table, downlink control Information format and feedback mode, the sounding reference signal configuration parameters include the period and subframe offset of the 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 used to Send dynamic signaling to the user equipment through the physical downlink control channel PDCCH or 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 The order includes any one or more of the following information: N-bit signaling, signaling indicating the redundancy version, signaling indicating the modulation and coding scheme MCS, signaling indicating the number of antenna ports, scrambling code sequence and layer number, new Data transmission indication signaling, where 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 specifically uses Sending downlink control information to the user equipment through the physical downlink control channel PDCCH, so that the user equipment determines the subframe number of the subframe where the downlink control information is located according to the downlink control information, or so that the The user equipment determines the subframe number of the 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 sixth aspect or any of the possible implementation manners from the first to the eleventh implementation manners of the sixth aspect, in a twelfth possible implementation manner of the sixth aspect, the time-frequency resources include: resources A pair of blocks, a group of resource blocks, a half subframe, a subframe, a group of subframes, or a group of resource blocks on a group of subframes.

In combination with the sixth aspect or any of the first to twelfth possible implementations of the sixth aspect, in the thirteenth possible implementation of the sixth aspect, the M time-frequency resources All resource blocks scheduled for the user equipment use the same precoding, and the M is a natural number.

With reference to the sixth aspect or any one possible implementation manner 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: After determining the DMRS pattern of the DMRS antenna port, perform resource mapping between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern;

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

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

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

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

The transmitter is further configured to send an additional DMRS indication message to the user equipment after the processor determines the additional DMRS pattern of the DMRS antenna port, where the additional DMRS indication message is used to indicate the DMRS antenna port An additional DMRS pattern, so that the user equipment determines an additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

In combination with the sixth aspect or any one of the first to sixteenth possible implementation manners of the sixth aspect, the seventeenth possible implementation manner of the sixth aspect further includes:

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

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

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

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

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

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

With reference to the sixth aspect or any one possible implementation manner of the first to twenty-first implementation manners of the sixth aspect, in the twenty-second possible implementation manner of the sixth aspect, the processor further uses For judging that if at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, then according to the overlapping resources of the at least two candidate DMRS patterns in the same time-frequency resource Elements are mapped on the same DMRS.

The demodulation reference signal transmission method, user equipment and base station provided by the embodiments of the present invention can obtain the DMRS pattern by receiving the DMRS indication message sent by the base station before the user equipment receives the DMRS sent by the base station, that is, determine the time and frequency at which the DMRS exists The position of the resource and/or the position of the RE occupied by the DMRS in the time-frequency resource, the base station also sends the DMRS according to the DMRS pattern, so the user equipment can obtain the DMRS according to the DMRS pattern, so that when the DMRS overhead is low, the base station Send DMRS to user equipment according to the DMRS pattern with low DMRS overhead, and the user equipment acquires DMRS according to the DMRS pattern with low overhead, which solves the problems in the prior art and improves the utilization rate of REs, so that effective data can be transmitted The RE increases, improving the data transfer rate.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

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

FIG. 2 is a flowchart of Embodiment 1 of the DMRS transmission method of the present invention;

FIG. 3 is a flow chart of Embodiment 2 of the DMRS transmission method of the present invention;

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

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

FIG. 8 is a schematic structural diagram of Embodiment 2 of the user equipment of the present invention;

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

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

FIG. 11 is a schematic structural diagram of Embodiment 2 of the base station of the present invention;

FIG. 12 is a schematic structural diagram of Embodiment 3 of the base station 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 purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 2 is the flowchart of Embodiment 1 of the DMRS transmission method of the present invention, as shown in Fig. 2, the method of this embodiment may include:

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

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

Step 103, the user equipment obtains the DMRS according to the DMRS pattern of the DMRS antenna port.

In this embodiment, before the user equipment receives the DMRS sent by the base station, the user equipment also receives a DMRS indication message sent by the base station. The DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, and the DMRS pattern is the time-frequency resource where the DMRS exists. and/or the position of the RE occupied by the DMRS in the time-frequency resource, then, according to the DMRS indication message received from the base station, the user equipment can determine the DMRS pattern of the DMRS antenna port, and at the same time know that the base station sends the DMRS pattern according to the DMRS pattern The user equipment sends the DMRS, so that the user equipment can determine which time-frequency resources have DMRS and/or the position of the RE occupied by the DMRS in the time-frequency resource, so that according to the specific position of the RE occupied by the DMRS, the base station can be obtained from these REs. DMRS sent by the user equipment.

The DMRS antenna port described in the embodiment of the present invention refers to an antenna port used to send a DMRS and/or an antenna port used to send a PDSCH and/or an antenna port used to send an EPDCCH. For example, the DMRS antenna ports may be antenna ports 7-14 and antenna ports 107-110 specified in the LTE 11 system.

The DMRS acquired by the user equipment in the embodiment of the present invention refers to the DMRS that has been propagated through the channel and superimposed with interference noise, and the acquired DMRS can be expressed as Where S is the DMRS sent by the base station, The DMRS obtained for the user equipment, H represents the channel gain, Intf represents the interference signal, and Noise represents the noise signal.

In the prior art, the DMRS patterns specified in the LTE protocol are mainly configured for the base station and the user equipment respectively, so the base station can only transmit DMRS according to the DMRS pattern specified in the LTE protocol, and the user equipment can only transmit DMRS according to the DMRS pattern specified in the LTE protocol. Obtaining DMRS will make it possible for the actual application, when the RE overhead occupied by the DMRS that actually needs to be sent is less than the RE overhead occupied by the DMRS in the DMRS pattern specified in the LTE protocol, the user equipment can only obtain the DMRS pattern according to the DMRS pattern specified in the LTE protocol. DMRS, in order for the user equipment to receive the DMRS, the base station can only send the DMRS to the user equipment according to the DMRS pattern stipulated in the LTE protocol, resulting in a decrease in the utilization rate of REs.

In the DMRS transmission method provided by the embodiment of the present invention, before receiving the DMRS sent by the base station, the user equipment receives the DMRS indication message sent by the base station, so as to obtain the DMRS pattern, that is, determine the location of the time-frequency resource where the DMRS exists and/or DMRS occupancy The position of the RE in the time-frequency resource, the base station also sends the DMRS according to the DMRS pattern, so the user equipment can obtain the DMRS according to the DMRS pattern, which realizes that when the DMRS overhead is low, the base station sends the DMRS according to the DMRS pattern with low DMRS overhead Send the DMRS to the user equipment, and the user equipment obtains the DMRS according to the DMRS pattern with low overhead, which solves the problems in the prior art and improves the utilization rate of REs, thereby increasing the number of REs that can transmit valid data and improving data transmission Rate.

Fig. 3 is the flow chart of embodiment 2 of the DMRS transmission method of the present invention, 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, the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the position of the 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.

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

In this embodiment, the base station needs to send a DMRS to the user equipment according to a certain DMRS pattern. Therefore, the base station first determines the DMRS pattern of the DMRS antenna port according to the actual application scenario, and then sends the DMRS to the user equipment according to the determined DMRS pattern. Because The base station may determine the DMRS pattern of the DMRS antenna port from multiple DMRS pattern candidate sets, so in order for the user equipment to accurately obtain the DMRS sent by the base station, the base station needs to notify the user equipment of the DMRS pattern determined by the base station, therefore, The base station sends a DMRS indication message to the user equipment, and the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, and the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the position of the RE occupied by the DMRS in the time-frequency resource, so that After receiving the DMRS indication message, the user equipment can determine the DMRS pattern of the DMRS antenna port, and at the same time know that the base station sends the DMRS to the user equipment according to the DMRS pattern, that is, the DMRS and RE are resource-mapped according to the DMRS pattern, so that the user equipment can determine which The DMRS and/or the position of the RE occupied by the DMRS in the time-frequency resource exist in the time-frequency resource, so that the DMRS sent by the base station to the user equipment can be obtained from these REs according to the specific position of the RE occupied by the DMRS.

In the prior art, the DMRS patterns specified in the LTE protocol are respectively configured for the base station and the user equipment. In practical applications, regardless of whether the RE overhead occupied by the DMRS that actually needs to be transmitted is smaller than the RE overhead occupied by the DMRS in the DMRS pattern specified in the LTE protocol , the base station can only send DMRS according to the DMRS pattern specified in the LTE protocol, so that the utilization rate of REs is reduced.

In the DMRS transmission method provided by the embodiments of the present invention, the base station first determines the DMRS pattern of the DMRS port, that is, determines the position of the time-frequency resource where the DMRS exists and/or the position of the RE occupied by the DMRS in the time-frequency resource, and converts the DMRS pattern Notify the user equipment through the DMRS indication message, and then send the DMRS to the user equipment according to the DMRS pattern, so that the user equipment obtains the DMRS according to the DMRS pattern indicated in the DMRS indication message, and realizes that when the DMRS overhead is low, the base station uses the DMRS overhead relatively low. The low DMRS pattern sends DMRS to the user equipment, and the user equipment obtains the DMRS according to the DMRS pattern with low overhead, which solves the problems in the prior art and improves the utilization rate of RE, so that the REs that can transmit valid data increase, Improved data transfer rate.

On the basis of Embodiment 1 of the present invention or Embodiment 2 of the present invention, the base station may send a DMRS indication message to the user equipment. Correspondingly, the user equipment receives a DMRS indication message sent by the base station. The DMRS indication message is used to indicate at least DMRS pattern for one DMRS antenna port. Specifically, the DMRS patterns of different DMRS antenna ports can be the same, then a DMRS pattern can be determined by a DMRS indication message, and the DMRS patterns of all DMRS antenna ports are the DMRS pattern determined by the DMRS indication message; different DMRS The DMRS pattern of the antenna port can be different. For each antenna port, the corresponding relationship between the DMRS indication message and the DMRS pattern can be defined in advance, so that the corresponding DMRS indication message and the DMRS pattern can be based on the same DMRS indication message and different antenna ports. Corresponding relationship, so as to determine the DMRS patterns of different antenna ports. Therefore, the signaling overhead of the DMRS indication message can be reduced.

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

The above-mentioned DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, including: the above-mentioned DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the position of the time-frequency resource where there is no DMRS , wherein, the density of DMRS, the interval degree of DMRS, the bitmap coding of DMRS and/or the position of time-frequency resource without DMRS are used to determine the DMRS pattern of the DMRS antenna port. Moreover, time-frequency resources may include: RB pairs, RB groups, half subframes, subframes, subframe groups, or RB groups on subframe groups; time-frequency resources may be predefined or configured by the base station for user equipment.

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

The interval degree of DMRS can be the interval number of time-frequency resources with DMRS. If the interval number of time-frequency resources with DMRS is n, it means that there is DMRS in one time-frequency resource in every n time-frequency resources. Among them, there is DMRS The position of the time-frequency resource in the n time-frequency resources can be predefined or notified to the user equipment by the base station through signaling; since there can be a corresponding relationship between the DMRS interval degree and the DMRS pattern, the DMRS interval degree can be Determine the DMRS pattern of the DMRS antenna port. For example, the number of REs occupied by the DMRS on one RB pair can be 2, and the interval between the RB pairs with DMRS is 2. At this time, the pilot pattern of the DMRS can be as shown in Figure 6, where When the RE overhead occupied by DMRS is 0.6%.

The bitmap encoding of the DMRS can be Y bits, where each bit corresponds to at least one RE that may be occupied by the DMRS. If a bit is set to '1', it means that at least one RE corresponding to the bit is occupied by the DMRS. If If a bit is set to '0', it means that at least one RE corresponding to this bit is not occupied by DMRS, for example, Y is 12, where each bit corresponds to the RE occupied by DMRS in Figure 1, if a bit is set to ' 1', it means that the RE corresponding to this bit is occupied by DMRS. If a bit is set to '0', it means that the RE corresponding to this bit is not occupied by DMRS. For example, Y is 3, and each bit is the same as that in Figure 1 4 REs belonging to the same subcarrier occupied by the DMRS in the corresponding, if a bit is set to '1', it means that the 4 REs corresponding to the bit are occupied by DMRS, if a bit is set to '0', it means that the The 4 REs corresponding to the bits are not occupied by the DMRS. Since there may be a corresponding relationship between the bitmap coding of the DMRS and the DMRS pattern, the DMRS pattern of the DMRS antenna port can be determined through the bitmap coding of the DMRS.

If the DMRS indication message indicates that there is no DMRS time-frequency resource position, then correspondingly, it can be determined that there is a DMRS time-frequency resource. Since there may be a corresponding relationship between the position of the DMRS time-frequency resource and the DMRS pattern, the DMRS can be determined. DMRS pattern of the antenna port.

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 can be 1, that is, all RBs scheduled for user equipment in each time-frequency resource use the same precoding; or, M can be the interval of DMRS, and then there are time intervals within the interval number of time-frequency resources of DMRS All the RBs in the frequency resources scheduled for user equipment use the same precoding. For example, as shown in Figure 6, the interval number of RB pairs with DMRS is 2, then RB0 and RB1 use the same precoding, and RB2 and RB3 use the same precoding The same precoding; or, M can be any natural number greater than 2. Specifically, the base station can configure the precoding RB group to the user equipment according to the predefined system bandwidth, and can also notify the value of M to the user equipment through high-level signaling The user equipment, wherein the precoded RB group includes RBs in M time-frequency resources, then all RBs in the precoded RB group scheduled to the user equipment use the same precoding, and the user equipment can determine M according to the predefined system bandwidth The value of M, or the user equipment obtains the value of M according to the high-level signaling sent by the base station.

The following describes the DMRS indication message sent by the base station or received by the user equipment and the DMRS pattern indicated by the DMRS indication message.

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

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

in, is the number of subcarriers contained in one RB, for example n _PRB is the number of RB, and the value range of n _PRB is is the maximum number of RBs in a time slot, m' is the first coefficient, m'=0, 1, 2;

k' is the second coefficient, Wherein, p is a DMRS antenna port number.

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

l=l'mod2+5 (2)

l' is the third coefficient, Among them, n _s is the time slot number, and mod represents modulo remainder operation.

Different DMRS patterns can be distinguished by different value sets of m' and/or n _PRB and/or n _s and/or l'. The above DMRS indication message may be a value set of m', and/or, a value set of n _PRB , and/or, a value set of n _s , and/or, a value set of l'. Wherein the value set of m' may indicate the density of DMRS in the frequency domain and/or the position of the DMRS in the frequency domain, the value set of n _s and/or the value set of l' may indicate the density of DMRS in the time domain and/or Or the position of the DMRS in the frequency domain, the value set of n _PRBs may indicate the interval of the DMRS and/or the density of the DMRS in the frequency domain and/or the position of the DMRS in the frequency domain.

In Embodiment 3 of the DMRS transmission method of the present invention, the DMRS indication message may be a base station through a system block (System Information Block, referred to as SIB), a master message block (Master Information Block, referred to as MIB), high-level signaling, media access Control (Media Access Control, MAC for short) or the set sequence in the cyclic prefix or the cell-specific signaling sent by the set scrambling code in the cyclic prefix. Specifically, the DMRS pattern candidate set of the DMRS antenna port can be defined in advance, and the DMRS pattern candidate set can include at least one DMRS pattern, for example, it can be the DMRS pattern specified in LTE10 or the DMRS pattern specified in LTE10 or the new DMRS pattern specified in the embodiment of the present invention. At least one DMRS pattern with lower RE overhead occupied by the increased DMRS, after the base station determines the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, through the SIB, MIB, the setting sequence in the cyclic prefix or the cyclic prefix Set the scrambling code and send cell-specific signaling to the user equipment. The cell-specific signaling can be used to indicate the DMRS pattern. After receiving the cell-specific signaling, the user equipment can determine the DMRS pattern according to the cell-specific signaling. It is any one of the DMRS patterns specified in LTE R10, the DMRS patterns specified in LTE10, or the newly added DMRS in the embodiment of the present invention, which occupies at least one DMRS pattern with low RE overhead, and the base station can The determined DMRS pattern sends the DMRS to the user equipment, and the user equipment can obtain the DMRS according to the DMRS pattern indicated by the cell-specific signaling, so that the base station can select a DMRS pattern with a lower RE overhead occupied by the DMRS to send the DMRS, and the user equipment can also It is determined that a DMRS pattern with a relatively low RE overhead occupied by the DMRS acquires the DMRS, so that the purpose of saving REs can be achieved. It should be noted that the cell-specific signaling sent by the base station to the user equipment through the SIB, MIB, the set sequence in the cyclic prefix, or the set scrambling code in the cyclic prefix is consistent with the prior art, and this embodiment does not Let me repeat.

Optionally, the DMRS indication message (cell-specific signaling in this embodiment) is also used to indicate any one or more of the following information: the maximum modulation order of received data, the modulation and coding scheme of received data (Modulation and CodingScheme, referred to as MCS) table, maximum modulation order of transmitted data, MCS table of transmitted data, Channel Quality Indicator (CQI) table, downlink control area configuration, uplink sounding reference signal (Sounding Reference Signal, SRS for short) configuration parameter table, downlink control information (Downlink Control Information, DCI for short) format and feedback mode, the SBS configuration parameters include SBS period and subframe offset. The base station sends a DMRS indication message for indicating any one or more types of information above to the user equipment, and accordingly, the user equipment can obtain any one or more types of information indicated in the DMRS indication message.

Wherein, the maximum modulation order information of the received data is used to instruct the user equipment to determine the maximum modulation order and/or the maximum modulation scheme used by the PDSCH, for example, the maximum modulation order of the received data may be 6 or 8, and the maximum modulation scheme may be 64 Quadrature Amplitude Modulation (QAM for short) or 256QAM; the modulation and coding scheme table information of received data is used to instruct the user equipment to determine the modulation and coding scheme table used by PDSCH, for example, multiple modulation and coding scheme tables can be defined in advance, and the received data The modulation and coding scheme table information is used to instruct the user equipment to use one of the modulation and coding scheme tables.

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

The channel quality indication table information is used to instruct the user equipment to determine the channel quality indication table used for measuring and reporting the CQI. For example, multiple channel quality indication tables may be pre-defined, and the channel quality indication table information is used to instruct the user equipment to use one of the channel quality indication tables.

The configuration information of the downlink control area is used to instruct the user equipment to determine the configuration of the downlink control area, and determine the position of the downlink control area according to the configuration of the downlink control area. For example, the configuration of multiple downlink control areas can be defined in advance. It is used to instruct the user equipment to use one of the configurations of the downlink control region.

The table information of the uplink sounding reference signal configuration parameters is used to instruct the user equipment to determine the table of the uplink sounding reference signal configuration parameters. The user equipment determines the resources for sending the uplink sounding reference signal according to the table of the uplink sounding reference signal configuration parameters. For example, multiple A table of uplink sounding reference signal configuration parameters, the table information of uplink sounding reference signal configuration parameters is used to instruct the user equipment to use one of the tables of uplink sounding reference signal configuration parameters.

The downlink control information format and feedback mode information is used to instruct the user equipment to determine the downlink control information format and feedback mode. The user equipment receives downlink control information according to the downlink control information format and feedback mode and performs feedback according to the feedback mode. For example, multiple downlink control information can be predefined. The control information format and feedback mode, the downlink control information format and feedback mode information is used to instruct the user equipment to use one of the downlink control information formats and feedback modes.

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

The following is an example of a 1-bit DMRS indication message. The DMRS indication message has two states, namely '0' and '1'. If the DMRS indication message is also used to indicate the maximum modulation order of the received data and the received data The modulation and coding scheme table and the channel quality indication table, the information of each state indication is shown in Table 1 below

Table I

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

The following is an example of a 2-bit DMRS indication message. The DMRS indication message has 4 states, namely '00', '01', '10' and '11'. If the DMRS indication message is also used to indicate the received data The maximum modulation order, the modulation and coding scheme table of the received data and the channel quality indication table, the information of each state indication is shown in Table 2.

Table II

Since the DMRS indication message also indicates various information at the same time, signaling overhead can be reduced.

Optionally, the DMRS indication message (cell-specific signaling in this embodiment) also includes any one or more of the following information: the maximum modulation order of received data, the modulation and coding scheme table of received data, the Maximum modulation order, MCS table for sending data, channel quality indication table, downlink control area configuration, table for uplink sounding reference signal configuration parameters, downlink control information format and feedback mode, where SRS configuration parameters include SRS period and subframe offset shift. The base station sends the DMRS indication message including any one or more information above to the user equipment, and correspondingly, the user equipment can obtain any one or more information included in the DMRS indication message. For related descriptions about any one or more types of information above, reference may be made to related records in the above embodiments, and details are not repeated in this embodiment.

Further, the base station can determine the DMRS pattern of the DMRS antenna port according to the cell type corresponding to the base station, for example: the cell type can include small cells, mobile cells and ordinary cells, and the base station can determine the RE overhead occupied by DMRS for the small cell according to the cell type For the lower DMRS pattern, the base station can determine the DMRS pattern specified by LTE R10 or LTE R11 for the common cell according to the cell type, and then the base station sends the cell-specific signaling to the user equipment, and the cell-specific signaling includes the cell corresponding to the base station Correspondingly, after receiving the cell-specific signaling, the user equipment obtains the cell type according to the cell-specific signaling, and then determines the DMRS pattern of the DMRS antenna port according to the cell type, for example: if the cell type is a small cell, Then the user equipment can determine that the DMRS pattern is a DMRS pattern that determines that the RE overhead occupied by the DMRS is low. If the cell type is a common cell, the user equipment can determine that the DMRS pattern is the DMRS pattern specified in LTE R10 or LTE R11.

Optionally, the cell type can also be used to determine any one or more of the following information: maximum modulation order of received data, MCS table of received data, maximum modulation order of transmitted data, MCS table of transmitted data, channel Quality indication CQI table, downlink control region configuration, uplink sounding reference signal SRS configuration parameter table, downlink control information DCI format and feedback mode, wherein the SRS configuration parameters include SRS period and subframe offset. Different cell types may determine different contents of any one or more of the above-mentioned information, and the base station sends cell-specific signaling including the cell type to the user equipment, and accordingly, the user equipment may obtain the information in the cell-specific signaling Cell type, any one or more of the above information may also be determined according to the cell type. For the specific process of the cell type used to determine any one or more of the above information, please refer to the relevant records of the implementation process of the DMRS indication message indicating any of the above information or the above information in the above embodiment, and this embodiment will not repeat it here. .

In Embodiment 4 of the DMRS transmission method of the present invention, the DMRS indication message may be UE-specific signaling sent by the base station through high-layer signaling or MAC signaling. Specifically, the DMRS pattern candidate set of the DMRS antenna port can be defined in advance, and the DMRS pattern candidate set can include at least one DMRS pattern, for example, it can be the DMRS pattern specified in LTE R10 or the DMRS pattern specified in LTE10 or the embodiment of the present invention The newly added DMRS occupies at least one DMRS pattern with low RE overhead. After the base station determines the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, it sends the cell-specific pattern to the user equipment through high-layer signaling or MAC signaling. Signaling, the user equipment specific signaling can be used to indicate the DMRS pattern, after the user equipment receives the user equipment specific signaling, it can determine the DMRS pattern as the DMRS pattern specified in LTE R10 according to the user equipment specific signaling It is still the DMRS pattern stipulated in LTE10 or any one of at least one DMRS pattern with a lower RE overhead newly added by the DMRS in the embodiment of the present invention, and the base station may send to the user equipment according to the DMRS pattern determined by the base station DMRS, the user equipment can obtain the DMRS according to the DMRS pattern indicated by the user equipment-specific signaling, so that the base station can select a DMRS pattern with a lower RE overhead occupied by the DMRS to send the DMRS, and the user equipment can also determine that the RE overhead occupied by the DMRS is lower. A low DMRS pattern acquires DMRS, so the purpose of saving RE can be achieved. It should be noted that the user equipment-specific signaling that the base station sends to the user equipment through high-layer signaling or medium access control MAC signaling is consistent with the prior art, and will not be described again in this embodiment.

Optionally, the DMRS indication message (in this embodiment, user equipment-specific signaling) is also used to indicate any one or more of the following information: the maximum modulation order of received data, the MCS table of received data, the The maximum modulation order, the MCS table for sending data, the channel quality indicator CQI table, the downlink control area configuration, the table for the uplink sounding reference signal SRS configuration parameters, the downlink control information DCI format and the feedback mode, where the SRS configuration parameters include SRS period and subframe offset. The base station sends a DMRS indication message for indicating any one or more types of information above to the user equipment, and accordingly, the user equipment can obtain any one or more types of information indicated in the DMRS indication message. For the implementation process of the DMRS indication message indicating any one or more of the foregoing information, reference may be made to relevant records in the foregoing embodiments, and details are not repeated in this embodiment.

Optionally, the DMRS indication message (user equipment-specific signaling in this embodiment) also includes any one or more of the following information: the maximum modulation order of received data, the MCS table of received data, the maximum Modulation order, MCS table for sending data, channel quality indication CQI table, downlink control area configuration, table for uplink sounding reference signal SRS configuration parameters, downlink control information DCI format and feedback mode, where the SRS configuration parameters include SRS period and frame offset. The base station sends the DMRS indication message including any one or more information above to the user equipment, and correspondingly, the user equipment can obtain any one or more information included in the DMRS indication message. For related descriptions about any one or more types of information above, reference may be made to related records in the above embodiments, and details are not repeated in this embodiment.

Further, the base station can determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH, for example: the corresponding relationship between the transmission mode of the PDSCH and the DMRS pattern of the DMRS antenna port can be predefined in the base station, and according to the corresponding relationship, the base station can determine different The DMRS pattern corresponding to the transmission mode of the PDSCH, and then, the base station sends the user equipment specific signaling to the user equipment, and the user equipment specific signaling includes the transmission mode of the PDSCH, and then, the base station sends the user equipment specific signaling to the user equipment The user equipment-specific signaling includes 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 user equipment can also The corresponding relationship between the PDSCH transmission mode and the DMRS pattern is defined in advance, and then the user equipment can determine the DMRS pattern of the DMRS antenna port according to the PDSCH transmission mode and the corresponding relationship.

Optionally, the transmission mode of the PDSCH can also be used to determine any one or more of the following information groups: the maximum modulation order of received data, the MCS table of received data, the maximum modulation order of transmitted data, the maximum modulation order of transmitted data, MCS table, channel quality indication CQI table, downlink control area configuration, table of uplink sounding reference signal SRS configuration parameters, downlink control information DCI format and feedback mode, wherein the SRS configuration parameters include SRS period and subframe offset. Different PDSCH transmission modes may determine different content in any one or more of the above-mentioned information, and the base station sends user equipment-specific signaling including the PDSCH transmission mode to the user equipment, and correspondingly, the user equipment may obtain the user equipment For the transmission mode of the PDSCH in the dedicated signaling, any one or more of the above information may also be determined according to the transmission mode of the PDSCH. The transmission mode of PDSCH is used to determine the specific process of any one or more kinds of information above. For details, please refer to the related records of the implementation process of the DMRS indication message indicating any one or more kinds of information above in the above embodiment. Let me repeat.

In Embodiment 5 of the DMRS transmission method of the present invention, the DMRS indication message may be dynamic signaling sent by the base station through PDCCH or EPDCCH, and the dynamic signaling includes any one or more of the following information: N-bit signaling, indicating redundancy Version signaling, signaling indicating the modulation and coding scheme, signaling indicating the number of antenna ports, scrambling code sequences, and layer numbers, and signaling indicating newly transmitted data, where N is a natural number. Specifically, the DMRS pattern candidate set of the DMRS antenna port can be defined in advance, and the DMRS pattern candidate set can include at least one DMRS pattern, for example, it can be the DMRS pattern specified in LTE R10 or the DMRS pattern specified in LTE10 or the embodiment of the present invention The newly added DMRS occupies at least one DMRS pattern with low RE overhead. After the base station determines the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, it sends the above dynamic information to the user equipment through the PDCCH or EPDCCH. The dynamic information The command can be used to indicate the DMRS pattern. After receiving the dynamic signaling, the user equipment can determine according to the dynamic signaling whether the DMRS pattern is the DMRS pattern specified in LTE R10, the DMRS pattern specified in LTE10, or the newly added DMRS pattern in the embodiment of the present invention. Any one of at least one DMRS pattern with low RE overhead occupied by the DMRS, 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 obtain the DMRS pattern according to the DMRS pattern indicated by the dynamic signaling , so that the base station can select a DMRS pattern with a lower RE overhead occupied by the DMRS to send a DMRS, and correspondingly, the user equipment can also determine a DMRS pattern with a lower RE overhead occupied by the DMRS to obtain a DMRS, thus achieving the purpose of saving REs. It should be noted that the dynamic signaling sent by the base station to the user equipment through the PDCCH or EPDCCH is consistent with the prior art, and will not be repeated in this embodiment.

Specifically, in this embodiment, the user equipment can determine the DMRS pattern according to the N-bit signaling in the dynamic signaling, for example: when the N-bit signaling is equal to the first preset value, the user equipment can determine that the DMRS pattern is occupied by the DMRS For a DMRS pattern with low RE overhead, 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 indication redundancy version is equal to the third preset value, the user equipment may determine that the DMRS pattern is occupied by the DMRS For a DMRS pattern with low RE overhead, when the indicated redundancy version is equal to the fourth 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 can determine the DMRS pattern according to the signaling indicating the MCS. For example, when the MCS belongs to the first preset range, the user equipment can determine that the DMRS pattern is a DMRS pattern with low RE overhead occupied by the DMRS. When the MCS When it belongs to the second preset range, 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 can determine the DMRS pattern according to the instruction indicating the antenna port, the scrambling code sequence, and the number of layers. For example, when the number of layers belongs to the third preset range, the user equipment can determine that the DMRS pattern is the RE overhead occupied by the DMRS. For a lower DMRS pattern, when the number of layers belongs to the fourth preset range, 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 newly transmitted data indication signaling in the dynamic signaling, for example: when the newly transmitted data indication signaling is equal to the fifth preset value, the user equipment may determine that the DMRS pattern is DMRS occupied The DMRS pattern with relatively low RE overhead, when the newly transmitted 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 the newly transmitted data indication signaling in the dynamic signaling. Specifically, when the newly transmitted data indication signaling indicates non-newly transmitted data or indicates retransmitted data, then The user equipment determines that the DMRS exists in the subframe where the dynamic signaling is located or in the subframe indicated by the dynamic signaling.

In Embodiment 6 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, the DMRS pattern candidate set of the DMRS antenna port can be defined in advance, and the DMRS pattern candidate set can include at least one DMRS pattern, for example, it can be the DMRS pattern specified in LTE R10 or the DMRS pattern specified in LTE10 or the embodiment of the present invention The newly added DMRS occupies at least one DMRS pattern with low RE overhead. After the base station determines the DMRS pattern of the DMRS antenna port from the DMRS pattern candidate set, it sends downlink control information through the PDCCH. The downlink control information can be used to indicate DMRS pattern, after the user equipment receives the downlink control information, in the first feasible implementation manner, the user equipment can, according to the downlink control information, the subframe number of the subframe where the downlink control information is located; in the second feasible implementation In the method, the user equipment can determine the subframe number of the subframe indicated by the downlink control information according to the downlink control information; the user equipment can also pre-define the corresponding relationship between the subframe number and the DMRS pattern, and then the user equipment can determine the subframe number according to the subframe number , to determine the DMRS pattern of the DMRS antenna port. For example: when the subframe number is even, the user equipment can determine that the DMRS pattern is a DMRS pattern with low RE overhead occupied by DMRS; when the subframe number is odd, the user equipment can determine that the DMRS pattern is LTE R10 or LTE R11 DMRS patterns specified in .

Further, in the first feasible implementation manner, after the user equipment determines the subframe number where the downlink control information is located, the user equipment can determine 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. Whether the difference between the subframe numbers of the subframes is greater than the preset value of the first number difference. If it is greater, the user equipment can determine that there is a DMRS in the subframe where the current downlink control information is located; if it is not greater, the user equipment can determine that the current downlink There is no DMRS in the subframe where the control information is located. In the second feasible implementation manner, after the user equipment determines the subframe number of the subframe indicated by the downlink control information, the user equipment can determine whether the subframe number of the subframe indicated by the current downlink control information is consistent with that of the last downlink control information Whether the difference between the subframe numbers of the subframe where it is located is greater than the preset value of the second number difference. If it is greater, the user equipment determines that there is a DMRS in the subframe indicated by the current downlink control information; if it is not greater, the user equipment determines that the current There is no DMRS in the subframe indicated by the downlink control information.

On the basis of the above embodiments of the present invention, after the base station determines the DMRS pattern of the DMRS antenna port, the base station can also perform resource mapping between PDSCH and/or EPDCCH and RE according to the determined DMRS pattern. Specifically, the base station can perform resource mapping based on the determined DMRS pattern. The determined DMRS pattern determines the REs that are resource-mapped with the DMRS, and the base station maps the PDSCH and/or EPDCCH to the REs that are not resource-mapped with the DMRS, that is, the REs that are not resource-mapped with the DMRS are resource-mapped with the PDSCH and/or EPDCCH , and then the base station sends the PDSCH and/or EPDCCH to the user equipment. It should be noted that the resource mapping process of the base station for the PDSCH and/or EPDCCH and REs according to the DMRS pattern is consistent with the prior art, and this embodiment will not repeat them here. .

Correspondingly, the user equipment can also obtain the mapping relationship between PDSCH and/or EPDCCH and RE according to the DMRS pattern, and obtain the PDSCH and/or EPDCCH according to the mapping relationship; the user equipment can determine the RE for resource mapping with the DMRS according to the DMRS pattern, The user equipment obtains the PDSCH and/or EPDCCH on the RE that is not resource-mapped with the DMRS, that is, the operation of obtaining the PDSCH and/or EPDCCH is not performed on the RE occupied by the DMRS. After the user equipment obtains the PDSCH and/or EPDCCH, the user equipment The PDSCH and/or EPDCCH may be demodulated according to the DMRS; it should be noted that the process of demodulating the PDSCH and/or EPDCCH according to the DMRS may include that the user equipment measures the downlink channel according to the obtained DMRS, and the user equipment demodulates the PDSCH and the downlink channel according to the measured downlink channel. /or EPDCCH, the specific implementation process is the same as that in the prior art, and will not be repeated in this embodiment. After the user equipment obtains the DMRS according to the DMRS pattern of the DMRS antenna port, the user equipment can also perform CQI calculation according to the DMRS. It should be noted that the process of performing CQI calculation according to the DMRS is consistent with the prior art, and this embodiment will not repeat it here. . It should be noted that the user equipment performs two steps of obtaining the mapping relationship between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern of the DMRS antenna port, and obtaining the PDSCH and/or EPDCCH according to the mapping relationship It only needs to be performed after step 102, which is not limited in this embodiment.

Further, on the basis of the above-mentioned embodiments of the present invention, the base station may also determine an additional DMRS pattern of the DMRS antenna port, where the additional DMRS pattern is the position of the time-frequency resource where there is a zero-power DMRS and/or the location of the zero-power DMRS The position of the occupied resource element in the time-frequency resource, the DMRS indication message sent by the base station to the UE is also used to indicate the additional DMRS pattern of the DMRS antenna port, so that the UE determines the additional DMRS pattern of the DMRS antenna port according to the DMRS indication message DMRS pattern, or the base station sends an additional DMRS indication message to the UE, the additional DMRS indication message is used to indicate the additional DMRS pattern of the DMRS antenna port, so that the UE determines the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message, and the base station can also Perform resource mapping between PDSCH and/or EPDCCH and REs according to the determined DMRS pattern and/or additional DMRS pattern. Specifically, the base station may determine the REs for resource mapping with the DMRS according to the determined DMRS pattern and according to the determined additional DMRS pattern. The pattern determines REs that are resource-mapped with zero-power DMRS, and the base station maps PDSCH and/or EPDCCH to REs that are not resource-mapped with DMRS and zero-power DMRS, that is, REs that are not resource-mapped with DMRS and zero-power DMRS and PDSCH and/or EPDCCH for resource mapping, and then the base station sends the PDSCH and/or EPDCCH to the user equipment. Wherein, the zero-power DMRS means that the base station can send a zero-power signal on the RE mapped to the zero-power DMRS; or, the base station can determine the RE for resource mapping with the zero-power DMRS according to the determined additional DMRS pattern, and the base station will PDSCH and /or EPDCCH is mapped to REs that are not resource-mapped with zero-power DMRS, that is, resource-mapped REs that are not resource-mapped with zero-power DMRS and PDSCH and/or EPDCCH, and then the base station sends PDSCH and/or EPDCCH to the user equipment . It should be noted that, in this embodiment, there is no limitation on the sequence between the base station performing the step of determining the additional DMRS pattern of the DMRS antenna port and performing steps 201-203.

Correspondingly, it also includes that the user equipment determines the 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 obtains the mapping relationship between PDSCH and/or EPDCCH and RE according to the DMRS pattern and/or the additional DMRS pattern, and obtains the PDSCH and/or EPDCCH according to the mapping relationship; Mapped REs and REs that are resource-mapped with zero-power DMRS determined according to the additional DMRS pattern. The operation of obtaining PDSCH and/or EPDCCH is not performed on the RE. After the user equipment obtains the PDSCH and/or EPDCCH, the user equipment can demodulate the PDSCH and/or EPDCCH according to the DMRS; For REs that are resource-mapped with power DMRS, the user equipment acquires PDSCH and/or EPDCCH on REs that are not resource-mapped with zero-power DMRS, that is, the operation of acquiring PDSCH and/or EPDCCH is not performed on REs occupied by zero-power DMRS. After the device acquires the PDSCH and/or EPDCCH, the user equipment can demodulate the PDSCH and/or EPDCCH according to the DMRS. The zero-power DMRS refers to that the user equipment assumes to send a zero-power signal on the RE mapped to 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 When the additional DMRS pattern is determined by the message, this embodiment does not limit the sequence between the step of determining the additional DMRS pattern of the DMRS antenna port and the execution of steps 201 to 203 by the user equipment.

Wherein, 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 information includes multiple states, and each state corresponds to a DMRS antenna port. DMRS pattern and an additional DMRS pattern of a DMRS antenna port, 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 state of the received DMRS indication information.

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

Table three

DMRS indication message DMRS pattern Additional DMRS pattern '0' DMRS pattern 1 Additional DMRS pattern 1 '1' DMRS pattern 2 Additional DMRS pattern 2

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.

The following is an example of a 2-bit DMRS indication message. The DMRS indication message has four states, namely '00', '01', '10' and '11'. The information indicated by each state is shown in Table 4 .

Table four

DMRS indication message DMRS pattern Additional DMRS pattern '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

Wherein, 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. I won't repeat them here.

Since the base station can transmit a zero-power signal on the RE indicated by the additional DMRS pattern, it will not cause interference to other base stations or user equipment using DMRS on the RE indicated by the additional DMRS pattern, so it can interfere with the DMRS of other base stations or user equipment. Interference, improve the DMRS transmission performance of other base stations or user equipment, improve the accuracy of channel estimation performed by the user equipment based on the DMRS, and then improve the throughput of the user equipment.

Further, the base station may acquire the DMRS pattern supported by the user equipment. In a first feasible implementation manner, before the user equipment receives the DMRS indication message sent by the base station, the user equipment may select at least one DMRS pattern from the DMRS pattern candidate set, and Send the selected at least one DMRS pattern to the base station through high-level signaling or a Physical Uplink Control Channel (PUCCH for short) or a Physical Uplink Shared Channel (PUSCH for short), wherein the DMRS pattern candidate A 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 high-level signaling or PUCCH or PUSCH, and the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set , so that the base station can determine the DMRS pattern of the DMRS antenna port according to at least one received DMRS pattern, specifically, the base station can determine the DMRS pattern of the DMRS antenna port from at least one received DMRS pattern sent by the user equipment, and then send the DMRS pattern to the The user equipment sends a DMRS indication message, so that the user equipment can acquire the DMRS by using the DMRS pattern selected by itself; or, the base station can determine the DMRS antenna port from the DMRS pattern candidate set except the at least one DMRS pattern The DMRS pattern of the DMRS pattern, wherein the DMRS pattern of the DMRS antenna port determined by the base station and the density of the DMRS indicated by the at least one DMRS pattern and/or the position of the time-frequency resource where the DMRS exists and/or the resource elements occupied by the DMRS are in time The location in the video resource is relatively close.

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

For example: the user equipment can select a DMRS pattern according to the moving speed of the user equipment. If the moving speed of the user equipment is lower than the first moving speed threshold, it indicates that the moving speed of the user equipment is low and requires less DMRS. In the pattern candidate set, select a DMRS pattern with a relatively low RE overhead occupied by the DMRS; if the moving speed of the user equipment is greater than the second moving speed threshold, it indicates that the moving speed of the user equipment is faster and requires more DMRS, and the user equipment can 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 delay spread of the downlink channel is less than the first multipath delay spread threshold, it means that the frequency domain correlation of the downlink channel is high and less DMRS is needed. , the user equipment can select a DMRS pattern with a lower RE overhead occupied by the DMRS from the DMRS pattern candidate set; if the multipath delay spread of the downlink channel is greater than the first multipath delay spread threshold, it indicates that the frequency domain correlation of the downlink channel The reliability is low, and the required DMRS is less, and the user equipment can 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. Since the DMRS processing capabilities of each user equipment can be different, the DMRS patterns that can be supported by each user equipment can also be different. Therefore, the user The device selects at least one DMRS pattern that the user equipment can support from the DMRS pattern candidate set according to the DMRS processing capability of the user equipment. Correspondingly, the at least one DMRS pattern sent by the user equipment received by the base station may be selected by the user equipment from the DMRS pattern candidate set according to the moving speed or downlink channel information of the user equipment or the DMRS processing capability of the user equipment. The user equipment may also select at least one DMRS pattern from the DMRS pattern candidate set according to a rank indicator (Rank Indicator, RI for short).

Further, the user equipment sending at least one DMRS pattern to the base station through high-layer signaling or PUCCH or PUSCH may include: the user equipment sends at least one DMRS pattern and rank indication to the base station through high-layer signaling or PUCCH or PUSCH. Correspondingly, the base station can receive the rank indication and at least one DMRS pattern sent by the user equipment through high-layer signaling or the physical uplink control channel or the physical uplink shared channel, so that the change time interval of the DMRS pattern selected by the user equipment cannot be less than the change of RI The time interval ensures that the base station can determine the DMRS pattern from the valid DMRS patterns selected by the user equipment. Furthermore, the user equipment sends the RI and at least one DMRS pattern to the base station through high-level signaling or PUCCH or PUSCH, which may include: the user equipment jointly encodes at least one DMRS pattern and RI; the user equipment jointly encodes at least one The DMRS pattern and rank indication are sent to the base station through high layer signaling or PUCCH or PUSCH. Correspondingly, the base station receives the jointly encoded RI and at least one DMRS pattern sent by the user equipment through high-level signaling or PUCCH or PUSCH, and then obtains at least one selected by the user equipment from the jointly encoded RI and at least one DMRS pattern. DMRS pattern.

In a second feasible 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, and the DMRS processing capability indication information includes indicating the DMRS processing capability of the user equipment. The corresponding relationship between DMRS processing capabilities and the number of DMRS patterns and/or DMRS patterns can be defined in advance. Therefore, before the base station determines the DMRS pattern of the DMRS antenna port, the base station can know the user equipment after receiving the DMRS processing capability indication message reported by the user equipment. DMRS processing capability, according to the corresponding relationship between the DMRS processing capability and the number of DMRS patterns and/or DMRS patterns, 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 can be determined, so that the base station can obtain from the user Determine the DMRS pattern of the DMRS antenna port among at least one DMRS pattern that the device can process, and then send a DMRS indication message to the user equipment, so that the user equipment can obtain a DMRS by using the DMRS pattern that can be processed by itself.

On the basis of the above-mentioned embodiments of the present invention, since the DMRS antenna end can correspond to different user equipment, and the DMRS patterns that can be processed by different user equipment can be different, therefore, there will be at least two different DMRS patterns on the DMRS antenna port , these DMRS patterns can be referred to as candidate DMRS patterns of the DMRS antenna port, therefore, if at least two candidate DMRS patterns of the DMRS antenna port have overlapping REs in the same time-frequency resource, then according to at least two candidate DMRS patterns in The overlapping REs in the same time-frequency resource are mapped to the same DMRS, so that the code domain orthogonality of the overlapping REs in the at least two candidate DMRS patterns can be realized.

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

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

in, is the number of subcarriers contained in one RB, for example n _PRB is the number of RB, and the value range of n _PRB is is the maximum number of RBs in a time slot, m' is the first coefficient, m'=0, 1, 2;

k' is the second coefficient, Wherein, p is a DMRS antenna port number.

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

l=l'mod2+5 (2)

l' is the third coefficient, Among them, n _s is the time slot number, and mod represents modulo remainder operation.

Different DMRS patterns can be distinguished by different value sets of m' and/or n _PRB and/or n _s and/or l'.

The DMRS symbols transmitted by the DMRS antenna port p on the RE at the position (k, l) can be expressed by formula (3):

in, is the DMRS symbol, r() is a pseudo-random sequence, is a pre-defined orthogonal code, where i∈{0,1,2,3}.

For different DMRS patterns, the DMRS symbols transmitted on REs corresponding to the same m', n _PRB and l' are also the same.

FIG. 7 is a schematic structural diagram of Embodiment 1 of the user equipment of the present invention. As shown in FIG. 7, the device of this embodiment may include: a receiving module 11, a determining module 12, and an obtaining module 13, wherein the receiving module 11 is used to receive the The DMRS indication message, the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, the DMRS pattern is the position of the time-frequency resource where the DMRS exists and/or the position of the resource element occupied by the DMRS in the time-frequency resource ;

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

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

The user equipment in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 2 , and its implementation principle and technical effect are similar. For details, refer to relevant records in the foregoing embodiments, and details are not repeated here.

FIG. 8 is a schematic structural diagram of the second embodiment of the user equipment of the present invention. As shown in FIG. 8, the user equipment in this embodiment is based on the structure of the user equipment shown in FIG. A DMRS indication message sent by the base station, where the one DMRS indication message is used to indicate the DMRS pattern of at least one DMRS antenna port; or, receiving at least two DMRS indication messages sent by the base station, where each DMRS indication message is used to indicate a DMRS pattern for DMRS antenna ports. The DMRS indication message received by the receiving module 11 is used to indicate the DMRS pattern of the DMRS antenna port, including: the DMRS indication message is used to indicate the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS and/or the absence of the DMRS The position of the time-frequency resource of the DMRS, wherein 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 to determine the DMRS pattern of the DMRS antenna port .

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

In a first feasible implementation, the DMRS indication message received by the receiving module 11 is the base station through the system information block, master message block, high-level signaling, medium access control signaling, and cyclic prefix setting. The cell-specific signaling sent by setting the scrambling code in the sequence or cyclic prefix.

Further, the cell-specific signaling received by the receiving module 11 includes the cell type corresponding to the base station; the determining module 12 is specifically configured to acquire the cell type according to the cell-specific signaling received by the receiving module 11; and Determine the DMRS pattern of the DMRS antenna port according to the cell type. Optionally, the determination module 12 is also used to determine any one or more of the following information according to the cell type: maximum modulation order of received data, modulation and coding scheme table of received data, maximum modulation order of transmitted data , a modulation and coding scheme table for sending data, a channel quality indication table, a downlink control area configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameters include the period and sub-period of the sounding reference signal frame offset.

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

Further, the user equipment-specific signaling received by the receiving module 11 includes the transmission mode of the physical downlink shared channel PDSCH; the determining module 12 is specifically configured to obtain the user equipment-specific signaling received by the receiving module 11. The transmission mode of the PDSCH; and according to the transmission mode of the PDSCH, determine the DMRS pattern of the DMRS antenna port. Optionally, the determination module 12 is also used to determine any one or more of the following information according to the transmission mode of the PDSCH: the maximum modulation order of received data, the modulation and coding scheme table of received data, the maximum modulation and coding scheme of transmitted data The order, the modulation and coding scheme table of the transmitted data, the channel quality indication table, the downlink control area configuration, the table of the uplink sounding reference signal configuration parameters, the downlink control information format and the feedback mode, the sounding reference signal configuration parameters include the sounding reference signal period and subframe offset.

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, and the dynamic signaling includes Any one or more of the following information: N-bit signaling, signaling indicating the redundancy version, signaling indicating the modulation and coding scheme, signaling indicating the number of antenna ports, scrambling code sequences and layers, new data indication For signaling, the 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 feasible implementation, 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; control information, determining the subframe number of the subframe where the downlink control information is located, or determining the subframe number of the subframe indicated by the downlink control information according to the downlink control information received by the receiving module 11; and according to The subframe number determines the DMRS pattern of the DMRS antenna port. Further, the determination module 12 is specifically used for:

Judging that 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 the first number difference preset value, then determine that the time-frequency resource with DMRS exists The position 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 last downlink control information is located is greater than the second number difference If the value is a preset value, it is determined that the position of the time-frequency resource where the DMRS exists is the subframe indicated by the current downlink control information.

Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on a subframe group. All resource blocks scheduled to the user equipment in the M time-frequency resources use the same precoding, where M is a natural number.

Further, in a first feasible implementation manner, the user equipment in this embodiment may further include a first processing module 14, where the first processing module 14 is configured to obtain the PDSCH and /or the mapping relationship between EPDCCH and resource elements; according to the mapping relationship, acquire the PDSCH and/or EPDCCH; demodulate the PDSCH and/or EPDCCH according to the DMRS acquired by the acquiring module 13; or, the first processing The module 14 is used for calculating the channel quality indication according to the DMRS obtained by the obtaining module 13 .

In a second feasible implementation manner, the user equipment in this embodiment may further include a second processing module 15, and the determining module 12 is further configured to determine an additional DMRS pattern of the DMRS antenna port, and the additional DMRS pattern is zero The position of the time-frequency resource of the power DMRS and/or the position of the resource element occupied by the zero-power DMRS in the time-frequency resource; the second processing module 15 is used to determine the position of the DMRS antenna port according to the determination module 12 DMRS pattern and/or additional DMRS pattern, acquire the mapping relationship between PDSCH and/or EPDCCH and resource elements; acquire the PDSCH and/or EPDCCH according to the mapping relationship; demodulate the PDSCH and/or EPDCCH according to the DMRS . Further, the determination module 12 is specifically configured to, before the second processing module 15 obtains the mapping relationship between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern, according to the DMRS indication The message determines the additional DMRS pattern of the DMRS antenna port; or,

The receiving module 11 is also configured to receive the additional DMRS sent by the base station before the second processing module 15 obtains the mapping relationship between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern and/or additional DMRS pattern of the DMRS antenna port. instruction message;

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

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

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

The user equipment in this embodiment can be used to implement the technical solution implemented by the user equipment in the above-mentioned embodiments of the present invention, and its implementation principle and technical effect are similar. For details, please refer to the relevant records in the above-mentioned embodiments, which will not be repeated here.

It should be noted that, in terms of hardware implementation, the above receiving module 11 can be a receiver or a transceiver, and the above first sending module 17 and second sending module 19 can be a transmitter or a transceiver, and the receiving module 11, the first The sending module 17 and the second sending module 19 may be integrated together to form a transceiver unit, corresponding to hardware implemented as a transceiver. The above determination module 12, acquisition module 13, first processing module 14, second processing module 15, selection module 16, first sending module 17, third processing module 18 and second sending module 19 can be embedded in or in the form of hardware The processor independent of the user equipment may also be stored in the memory of the user equipment in the form of software, so that the processor can invoke and execute the operations corresponding to the above modules. The processor may be a central processing unit (Central Processing Unit, CPU for short), a microprocessor, a single-chip microcomputer, and the like.

FIG. 9 is a schematic structural diagram of Embodiment 3 of the user equipment of the present invention. As shown in FIG. 23 connected processor 24 . Of course, the user equipment may also include common components such as an antenna, a baseband processing component, an intermediate radio frequency processing component, and an input and output device, which are not limited in this embodiment of the present invention.

Wherein, a set of program codes are stored in the memory 23, and the processor 24 is used to call the program codes stored in the memory 23 to perform the following operations:

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

Further, the receiver 21 receives the DMRS indication message sent by the base station, the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, including:

Receive a DMRS indication message sent by the base station through the receiver 21, the DMRS indication message is used to indicate the DMRS pattern of at least one DMRS antenna port; or,

The receiver 21 receives at least two DMRS indication messages sent by the base station, and each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

Further, the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, including: the DMRS indication message is used to indicate the density of the DMRS, the interval degree of the DMRS, the bitmap coding of the DMRS and/or when there is no DMRS The position of the frequency resource, 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 to determine the DMRS pattern of the DMRS antenna port.

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

The DMRS indication message also includes any one or more of the following information: the maximum modulation order of received data, the modulation and coding scheme table of received data, the maximum modulation order of transmitted data, the modulation and coding scheme table of transmitted data, the channel Quality indication table, downlink control area configuration, table of uplink sounding reference signal configuration parameters, downlink control information format and feedback mode, where the sounding reference signal configuration parameters include the period and subframe offset of the sounding reference signal.

Further, in a first feasible implementation manner, the DMRS indication message is a set sequence in a system information block, a master message block, a high-layer signaling, a media access control signaling, a cyclic prefix, or The cell-specific signaling sent by setting the scrambling code in the cyclic prefix. Further, the cell-specific signaling includes the cell type corresponding to the base station; then 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 of the DMRS antenna port according to the cell type.

Optionally, it also includes: the processor 24 determines any one or more of the following information according to the cell type: maximum modulation order of received data, modulation and coding scheme table of received data, maximum modulation order of transmitted data , a modulation and coding scheme table for sending data, a channel quality indication table, a downlink control area configuration, a table of uplink sounding reference signal configuration parameters, a downlink control information format, and a feedback mode, where the sounding reference signal configuration parameters include the period and sub-period of the sounding reference signal frame offset.

In a second feasible implementation manner, the DMRS indication message is user equipment-specific signaling sent by the base station through high-level signaling or media access control signaling. Further, the user equipment-specific signaling includes the transmission mode of the physical downlink shared channel PDSCH; then 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 user equipment-specific signaling;

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

Optionally, it also includes: the processor 24 determines any one or more of the following information according to the transmission mode of the PDSCH: the maximum modulation order of received data, the modulation and coding scheme table of received data, and the maximum modulation and coding scheme of transmitted data The order, the modulation and coding scheme table of the transmitted data, the channel quality indication table, the downlink control area configuration, the table of the uplink sounding reference signal configuration parameters, the downlink control information format and the feedback mode, the sounding reference signal configuration parameters include the sounding reference signal period and subframe offset.

In a third feasible 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, and the dynamic signaling includes any of the following or multiple types of information: N-bit signaling, signaling indicating redundancy version, signaling indicating modulation and coding scheme, signaling indicating number of antenna ports, scrambling code sequence and number of layers, new transmission data indicating signaling, the N is a natural number; then 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 of the DMRS antenna port according to the dynamic signaling.

In a fourth feasible implementation, the DMRS indication message is downlink control information sent by the base station through a physical downlink control channel; then the processor 24 determines the DMRS antenna port's DMRS patterns, including:

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

The processor 24 determines the DMRS pattern of the DMRS antenna port according to the subframe number.

Optionally, the processor 24 determines the DMRS pattern of 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 the first number difference preset value, the processor 24 determines that the time when the DMRS exists The location of the frequency resource 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 last downlink control information is located is greater than the second number difference preset value, the processor 24 determines that the DMRS exists The location of the time-frequency resource is the subframe indicated by the current downlink control information.

Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on a subframe group. All resource blocks scheduled to the user equipment in the M time-frequency resources use the same precoding, where M is a natural number.

Further, in the first feasible implementation manner, it also includes:

The processor 24 acquires a mapping relationship between PDSCH and/or EPDCCH and 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,

The processor 24 performs channel quality indicator calculation according to the DMRS.

In the second possible implementation, it also includes:

The processor 24 determines the additional DMRS pattern of the DMRS antenna port, the additional DMRS pattern is the position of the time-frequency resource where the zero-power DMRS exists and/or the resource element occupied by the zero-power DMRS in the time-frequency resource Location;

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

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

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

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

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

Receive the additional DMRS indication message sent by the base station through the receiver 21;

The processor 24 determines the additional DMRS pattern of the DMRS antenna port according to the additional DMRS indication message.

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

Processor 24 selects at least one DMRS pattern from the DMRS pattern candidate set;

The transmitter 22 sends the at least one DMRS pattern to the base station through 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 antenna according to the at least one DMRS pattern The DMRS pattern of the port.

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

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

Further, sending the at least one DMRS pattern to the base station through high layer signaling or PUCCH or PUSCH through the transmitter 22, including:

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

Further, the transmitting the rank indication and the at least one DMRS pattern to the base station through the transmitter 22 through the high layer signaling or PUCCH or PUSCH includes:

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

Sending the jointly coded rank indication and at least one DMRS pattern to the base station through the transmitter 22 through the high layer signaling or PUCCH or PUSCH.

In the second feasible implementation manner, before receiving the DMRS indication message sent by the base station through the receiver 21, it also includes:

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

The user equipment in this embodiment can be used to implement the technical solutions performed by the user equipment in the above method embodiments of the present invention, and its implementation principle and technical effect are similar. For details, please refer to the relevant records in the above embodiments, and will not repeat them here. .

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

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

The base station in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 3 , and its implementation principle and technical effect are similar. For details, refer to relevant records in the foregoing embodiments, and details are not repeated here.

Fig. 11 is a schematic structural diagram of the second embodiment of the base station of the present invention. As shown in Fig. 11, the base station in this embodiment is based on the structure of the base station shown in Fig. 10, and further, the sending module 32 is specifically configured to send A DMRS indication message, the one DMRS indication message is used to indicate the DMRS pattern of at least one DMRS antenna port; or, at least two DMRS indication messages are sent to the user equipment, each DMRS indication message is used to indicate a DMRS antenna port DMRS pattern. The DMRS indication message sent by the sending module 32 is used to indicate the DMRS pattern of the DMRS antenna port, including: the DMRS indication message includes the density of the DMRS, the interval of the DMRS, the bitmap coding of the DMRS, and/or when there is no DMRS The position of the frequency resource, 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 to determine the DMRS pattern of the DMRS antenna port.

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

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

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

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

In a second feasible implementation manner, the sending module 32 is specifically configured to send user equipment specific signaling to the user equipment through high layer signaling or media access control signaling. Further, the determining module 31 is specifically configured to determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the physical downlink shared channel PDSCH; wherein, the user equipment-specific signaling sent by the sending module 32 includes the transmission mode of the PDSCH, so as to making the user equipment determine the transmission mode of the PDSCH according to the user equipment specific signaling, and determine the DMRS pattern of the DMRS antenna port according to the transmission mode of the PDSCH.

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

In a third feasible implementation manner, the sending module 32 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 can transmit dynamic signaling according to the dynamic signaling. The signaling determines the DMRS pattern of the DMRS antenna port, and the dynamic signaling includes any one or more of the following information: N-bit signaling, signaling indicating a redundancy version, signaling indicating a modulation and coding scheme MCS, The signaling indicating the number of antenna ports, the number of scrambling code sequences and the number of layers, and the signaling indicating newly transmitted data, where N is a natural number.

In a fourth feasible 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 the downlink control information according to the downlink control information The subframe number of the subframe where it is located, or to enable the user equipment to determine the subframe number of the subframe indicated by the downlink control information according to the downlink control information, and determine the subframe number according to the subframe number DMRS pattern for DMRS antenna ports.

Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on a subframe group. All resource blocks scheduled to the user equipment in the M time-frequency resources use the same precoding, where M is a natural number.

Further, in the first feasible implementation manner, the device of this embodiment may further include: a first processing module 33, where the first processing module 33 is configured to determine the DMRS pattern of the DMRS antenna port according to the determined module 31. Perform resource mapping between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern; the sending module 32 is also configured to send the PDSCH and/or EPDCCH to the user equipment.

In a second feasible implementation manner, the device of this embodiment may further include: a second processing module 34, and the determining module 31 is further configured to determine an additional DMRS pattern of the DMRS antenna port, and the additional DMRS pattern is zero The position of the time-frequency resource of the power DMRS and/or the position of the resource element occupied by the zero-power DMRS in the time-frequency resource; the second processing module 34 is used to determine the position of the DMRS antenna port according to the determination module 31 The DMRS pattern and/or the additional DMRS pattern perform resource mapping between the PDSCH and/or EPDCCH and resource elements; the sending module 32 is also configured to send the PDSCH and/or EPDCCH to the user equipment.

Further, the DMRS indication message is also 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 DMRS indication message; or,

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

Furthermore, the base station in this embodiment further includes a first receiving module 35 .

In a first feasible 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, the user equipment through high-layer signaling or the physical uplink control channel PUCCH or the physical uplink shared channel. At least one DMRS pattern sent by the PUSCH, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set; the determining module 31 is specifically configured to determine the at least one DMRS pattern received by the first receiving module 35. DMRS pattern for DMRS antenna ports.

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

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

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

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

Furthermore, the base station of this embodiment may also include a third processing module 37, and the third processing module 37 is used to determine if at least two candidate DMRS patterns of the DMRS antenna port have overlapping resources in the same time-frequency resource elements, then map the same DMRS on overlapping resource elements in the same time-frequency resource according to the at least two candidate DMRS patterns.

The base station in this embodiment can be used to implement the technical solution implemented by the base station in the above-mentioned embodiments of the present invention, and its implementation principle and technical effect are similar. For details, please refer to the relevant records in the above-mentioned embodiments, which will not be repeated here.

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

Figure 12 is a schematic structural diagram of the third embodiment of the base station of the present invention. As shown in Figure 12, the base station of this embodiment may include a transmitter 41, a receiver 42, and a memory 43, and be connected to the transmitter 41, the receiver 42, and the memory 43 respectively processor 44 . Of course, the base station may also include common components such as an antenna, a baseband processing component, an intermediate radio frequency processing component, and an input and output device, which are not limited in this embodiment of the present invention.

Wherein, a set of program codes are stored in the memory 43, and the processor 44 is used to call the program codes stored in the memory 43 to perform the following operations:

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

Further, the sending a DMRS indication message to the user equipment through the transmitter 41, where the DMRS indication message is used to indicate the DMRS pattern of the DMRS antenna port, includes:

Send a DMRS indication message to the user equipment through the transmitter 41, where the DMRS indication message is used to indicate the DMRS pattern of at least one DMRS antenna port; or,

The transmitter 41 sends at least two DMRS indication messages to the user equipment, and each DMRS indication message is used to indicate a DMRS pattern of a DMRS antenna port.

Further, the DMRS indication message includes DMRS density, DMRS interval, DMRS bitmap code and/or the location of time-frequency resources where DMRS does not exist, the DMRS density, DMRS interval, and DMRS all The bitmap code and/or the position of the time-frequency resource without DMRS is used to determine the DMRS pattern of the DMRS antenna port.

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

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

In a first feasible implementation manner, the sending of the DMRS indication message to the user equipment through the transmitter 41 includes: through the system information block, the master message block, high-layer signaling, media access control signaling, The transmitter 41 sends cell-specific signaling to the user equipment for the set scrambling code in the set sequence or cyclic prefix.

Further, the processor 44 determines the DMRS pattern of the DMRS antenna port, including: the processor 44 determines the DMRS pattern of the DMRS antenna port according to the cell type; wherein the cell-specific signaling includes the 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 also used to determine any one or more of the following information: maximum modulation order of received data, modulation and coding scheme table of received data, maximum modulation order of transmitted data, modulation of transmitted data Coding scheme table, channel quality indication table, downlink control region configuration, table of uplink sounding reference signal configuration parameters, downlink control information format and feedback mode, where the sounding reference signal configuration parameters include the period and subframe offset of the sounding reference signal.

In a second feasible implementation manner, the sending the DMRS indication message to the user equipment through the transmitter 41 includes: sending the DMRS indication message to the user equipment by the transmitter 41 through high-level signaling or media access control signaling. Device-specific signaling.

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

The processor 44 determines the DMRS pattern of the DMRS antenna port according to the transmission mode of the physical downlink shared channel PDSCH; wherein, the user equipment specific signaling includes the transmission mode of the PDSCH, so that the user equipment according to the user equipment specific The transmission mode of the PDSCH is determined by signaling, and the DMRS pattern of the DMRS antenna port is determined according to the transmission mode of the PDSCH.

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

In a third feasible implementation manner, the sending the DMRS indication message to the user equipment through the transmitter 41 includes: transmitting the DMRS indication message to the user equipment by the transmitter 41 through a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH The device sends dynamic signaling, so that the user equipment determines 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, indication The signaling of the redundancy version, the signaling indicating the modulation and coding scheme MCS, the signaling indicating the number of antenna ports, the number of scrambling code sequences and the number of layers, and the signaling indicating newly transmitted data, where N is a natural number.

In a fourth feasible implementation manner, the sending the DMRS indication message to the user equipment through the transmitter 41 includes: sending the downlink control information to the user equipment by the transmitter 41 through the physical downlink control channel PDCCH, so that The user equipment determines the subframe number of the subframe where the downlink control information is located according to the downlink control information, or enables the user equipment to determine the subframe indicated by the downlink control information according to the downlink control information and determine the DMRS pattern of the DMRS antenna port according to the subframe number.

Further, the time-frequency resource includes: a resource block pair, a resource block group, a half subframe, a subframe, a subframe group, or a resource block group on a subframe group. All resource blocks scheduled to the user equipment in the M time-frequency resources use the same precoding, where M is a natural number.

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

The processor 44 performs resource mapping between the PDSCH and/or EPDCCH and resource elements according to the DMRS pattern; and sends the PDSCH and/or EPDCCH to the user equipment through the transmitter 41 .

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

The processor 44 performs resource mapping between PDSCH and/or EPDCCH and resource elements according to the DMRS pattern of the DMRS antenna port and/or the additional DMRS pattern, and the additional DMRS pattern is the position and/or The position of the resource element occupied by the zero-power DMRS in the time-frequency resource;

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

Further, the DMRS indication message is also 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 DMRS indication message; or,

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

Send an additional DMRS indication message to the user equipment through the transmitter 41, 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 patterns for DMRS antenna ports.

Furthermore, in the first feasible implementation manner, before the processor 44 determines the DMRS pattern of the DMRS antenna port, it also includes: receiving the user equipment through the high layer signaling or the physical uplink control channel PUCCH through the receiver 42 Or at least one DMRS pattern sent to the physical uplink shared channel PUSCH, the at least one DMRS pattern is selected by the user equipment from the DMRS pattern candidate set;

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

The processor 44 determines the DMRS pattern of the DMRS antenna port according to the at least one DMRS pattern.

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

Further, the receiving at least one DMRS pattern sent by the user equipment through high-layer signaling or PUCCH or PUSCH through the receiver 42 includes: receiving through the receiver 42 the at least one DMRS pattern sent by the user equipment through the high-level signaling or PUCCH or PUSCH The rank indication sent by PUSCH and the at least one DMRS pattern.

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

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

Further, it also includes: the processor 44 judges that if at least two candidate DMRS patterns of the DMRS antenna port have overlapping resource elements in the same time-frequency resource, then according to the at least two candidate DMRS patterns in the same time-frequency resource, The same DMRS is mapped to overlapping resource elements in a time-frequency resource.

The base station in this embodiment can be used to implement the technical solution performed by any base station in the above-mentioned method embodiments of the present invention. Its implementation principle and technical effect are similar. For details, please refer to the relevant records in the above-mentioned embodiments, and will not repeat them here. .

FIG. 13 is a schematic structural diagram of an embodiment of the DMRS transmission system of the present invention. As shown in FIG. 13 , the system of this embodiment includes: user equipment 50 and base station 60, wherein the user equipment 50 can be implemented using any of the devices in FIG. 7 to FIG. 9 The structure of the example, correspondingly, can implement the technical solution executed by any user equipment in the above-mentioned method embodiments of the present invention, and its implementation principle and technical effect are similar. For details, please refer to the relevant records in the above-mentioned embodiments, which will not be repeated here. repeat. The base station 60 can adopt the structure of any one of the apparatus embodiments in Fig. 10 to Fig. 12, and correspondingly, it can execute the technical solution executed by any of the base stations in the above-mentioned method embodiments of the present invention. The implementation principle and technical effect are similar, and details can be found in Relevant records in the foregoing embodiments will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (88)

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

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;

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

further comprising:

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.

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:

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.

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:

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.

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:

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.

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:

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.

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:

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.

10. The method of claim 7, further comprising:

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.

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:

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

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:

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.

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:

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.

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:

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;

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

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

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

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.

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:

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.

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

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.

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:

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.

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:

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.

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:

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.

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 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;

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:

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.

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:

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.

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:

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.

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

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.

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

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.

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

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.

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

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.

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:

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.

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

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.

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:

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.

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,

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.

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 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.

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:

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.

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:

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.

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:

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.

44. The method of claim 43, further comprising:

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.

45. A user device, comprising:

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;

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:

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.

46. The UE of claim 45, wherein 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.

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:

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.

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;

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.

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);

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.

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;

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.

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;

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.

57. The UE of claim 56, wherein 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.

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;

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.

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,

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.

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

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

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.

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:

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.

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

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.

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:

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.

68. The base station of claim 67, wherein 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.

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

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.

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;

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.

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);

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.

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;

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 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;

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

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,

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.

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

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.

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:

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.

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

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.