CN103581095B - Downlink user dedicated demodulation reference signal transmitting method and device - Google Patents

Downlink user dedicated demodulation reference signal transmitting method and device Download PDF

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CN103581095B
CN103581095B CN201310057572.9A CN201310057572A CN103581095B CN 103581095 B CN103581095 B CN 103581095B CN 201310057572 A CN201310057572 A CN 201310057572A CN 103581095 B CN103581095 B CN 103581095B
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antenna port
frame
ofdm symbol
transmission
resource
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CN103581095A (en
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高雪娟
林亚男
丁昱
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

An embodiment of the invention discloses a downlink user dedicated demodulation reference signal (DM-RS) transmitting method and device and relates to the field of wireless communication. The downlink user dedicated DM-RS transmitting method and device are used for improving the data demodulation performance on a new carrier type (NCT) carrier. According to the downlink user dedicated DM-RS transmitting method, a base station determines mapping resources of DM-RSs in a current sub-frame according to the DM-RS resource mapping mode; the DM-RSs are mapped into the current sub-frame for transmission according to the determined DM-RS mapping resources; a terminal determines the mapping resources of the DM-RSs in the current sub-frame according to the DM-RS resource mapping mode; the DM-RSs transmitted in the current sub-frame is obtained according to the determined DM-RS mapping resources. The DM-RS mapping resources at least comprise a resource unit RE on at least one of N former orthogonal frequency division multiplexing (OFDM) codes of the current sub-frame, and N is an integer no less than 1. The method can be used for improving the modulation performance of data on the NCT carrier.

Description

The transmission method and equipment of downlink user dedicated demodulation reference signal
Technical field
The present invention relates to wireless communication field, more particularly to a kind of transmission method of downlink user dedicated demodulation reference signal And equipment.
Background technology
Carried in the tradition (Legacy) of Long Term Evolution enhancing (Long Term Evolution-Advance, LTE-A) system On ripple, by OFDM (the Orthogonal Frequency Division in a descending sub frame Multiplexing, OFDM) symbol is divided into control area and data area two parts, and control area is the preceding N of the descending sub frame Individual OFDM symbol, as shown in Figure 1.Wherein, the possible values of N are 1,2,3,4, and N=4 is only applicable to system bandwidth for 1.4MHz Carrier wave.The legacy down channels of bearing downlink control information, such as Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), Physical Control Format Indicator Channel (Physical Control Format Indicator Channel, PCFICH), Physical HARQ Indicator Channel (Physical Hybrid-ARQ Indicator Channel, PHICH), in control area transmission；The down channel of bearing downlink data, such as Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) can only be transmitted in data area.That is PDCCH and PDSCH time multiplexed transmissions.
The downlink reference signal that solution is called in lte-a system mainly includes cell special reference (Cell-specific Reference signals, CRS) and the reference of user equipment (User Equipment, UE, also referred to as terminal device) special demodulating Signal (DeModulation Reference Signal, DM-RS).9 kinds of downlink transfer patterns, UE defined in lte-a system Specifically used which kind of transmission mode is pre-configured with by high-level signaling.Different downlink reference signals is applied to different transmission moulds Formula.
CRS be used for transmission mode 1~6 signal demodulate, can support single antenna port transmission (antenna port numbering p=0), Two antenna ports transmit (antenna port numbering p=0,1) or four antenna ports transmission (antenna port numbering p=0,1,2,3).Will Each time slot (slot) in one subframe respectively corresponding 1 Physical Resource Block (Physical Resource Block, PRB) it is referred to as 1 PRB to (PRB pair), CRS resource mapping methods such as Fig. 2 a and Fig. 2 b in units of a PRB pair It is shown, wherein, Fig. 2 a are the mapping mode under conventional cyclic prefix (Cyclic Prefix, CP), and Fig. 2 b are to extend reflecting under CP Penetrate mode.CRS is transmitted in the full bandwidth of carrier wave, and is all transmitted in each subframe.
The signal that DM-RS is used for transmission mode 7~9 is demodulated, and can support that 1~8 antenna port is transmitted, and is arranged respectively at day Line end mouthful p=5, p=7, p=8or p=7, wherein 8 ..., υ+6, υ are layer (Layer) number of PDSCH transmission.DM-RS only exists Transmission mode is to be sent on PRB where 7~9 PDSCH transmission, with reduce reference symbol expense, save energy, reduce it is adjacent The interference of minizone.Fig. 3 a (under conventional CP) and Fig. 3 b (under extension CP) show DM-RS in units of a PRB pair Resource mapping method, wherein, mapping resources of the DM-RS on antenna port 7/8/11/13 is identical, in antenna port 9/10/12/ Mapping resource on 14 is identical.Ensure to use the difference of same map resource by the time domain orthogonal sequence shown in Tables 1 and 2 The orthogonality between DM-RS on antenna port.Under extension CP, DM-RS does not support to be transmitted in antenna port 9~14.Additionally, right Descending pilot frequency time slot (the Downlink Pilot Time in time division duplex (Time Division Duplex, TDD) system Slot, DwPTS) length is that (under i.e. descending conventional CP, DwPTS is 6592T to 3 special subframes of OFDM symbolSSpecial son Frame, under downbound expansion CP, DwPTS is 7680TSSpecial subframe, wherein TSFor system uses time interval), i.e. special subframe With set to 0 with 5 times special subframes using descending conventional CP, and special subframe match somebody with somebody set to 0 it is special with 4 time use downbound expansion CP Subframe, does not support that DM-RS is transmitted.
Table 1：Under conventional CP, the DM-RS orthogonal sequences of different antennae port
Table 2：Under extension CP, the DM-RS orthogonal sequences of different antennae port
In order to further improve resource utilization ratio, the version -11 (Rel-11, Release 11) of lte-a system is really It is fixed for introduced in carrier aggregation (Carrier Aggregation, CA) system new wave-carring type (New Carrier Type, NCT), heterogeneous network is supported with the strengthening system availability of frequency spectrum, preferably, power consumption is reduced.At present on NCT：Do not transmit PDCCH The legacy down channels of equivalent-load Downlink Control Information, in order to improve NCT resource utilizations, PDSCH can be in top n OFDM (control area in the subframe for being defined on legacy carrier waves) is transmitted on symbol, i.e. PDSCH can be in a subframe All OFDM symbols on transmit；NCT only supports to use the PDSCH transmission of transmission mode 9, can be by being polymerized with NCT PDCCH on legacy carrier waves carries out cross-carrier scheduling, it is also possible to by the enhancing Physical Downlink Control Channel on NCT (Enhanced Physical Downlink Control Channel, E-PDCCH) is dispatched；E-PDCCH and legacy PDCCH's is differred primarily in that, E-PDCCH is transmitted with PDSCH frequency division multiplexings, therefore, E-PDCCH can also be accorded with all OFDM Transmission on number；NCT is only supported at the CRS that 5ms on single antenna port (antenna port p=0) is the cycle and transmits, and CRS is only used for Measurement and tracking, are not used in demodulation；The down channels such as E-PDCCH, PDSCH on NCT need to be demodulated based on DM-RS.
To sum up, in the DM-RS resource mapping methods of Rel-10 definition, DM-RS is not uploaded in the OFDM symbol of control area Defeated, E-PDCCH and PDSCH on NCT are mapped in when being transmitted in all OFDM symbols in a subframe in time domain, at least before Channel-estimation information in N number of OFDM symbol needs to carry out extrapolation algorithm by the DM-RS of limited row to obtain, and reduces on NCT Data demodulation performance；And DM-RS does not support to be transmitted in DwPTS is 3 special subframes of OFDM symbol, causes only comprising 3 Downlink data can not be transmitted based on DM-RS in the special subframe of individual OFDM symbol, reduce the resource utilization of NCT.
The content of the invention
The embodiment of the present invention provides the transmission method and equipment of a kind of downlink user dedicated demodulation reference signal, for improving Data demodulation performance on NCT carrier waves.
A kind of downlink user dedicated demodulation reference signal DM-RS transmission methods, the method includes：
Terminal determines mapping resources of the DM-RS in present sub-frame according to DM-RS resource mapping methods, and the DM-RS reflects The resource penetrated in resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame OFDM symbol Unit R E, N are the integer not less than 1；
Terminal maps resource according to the DM-RS for determining, obtains the DM-RS transmitted in present sub-frame.
A kind of downlink user dedicated demodulation reference signal DM-RS transmission methods, the method includes：
Base station determines mapping resources of the DM-RS in present sub-frame according to DM-RS resource mapping methods, and the DM-RS reflects The resource penetrated in resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame OFDM symbol Unit R E, N are the integer not less than 1；
Base station maps resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame and is transmitted.
A kind of terminal, the terminal includes：
Resource mapping unit, for determining mapping moneys of the DM-RS in present sub-frame according to DM-RS resource mapping methods Source, the DM-RS mappings resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame Resource Unit RE, N in OFDM symbol are the integer not less than 1；
Signal acquiring unit, for mapping resource according to the DM-RS for determining, obtains the DM- transmitted in present sub-frame RS。
A kind of base station, the base station includes：
Resource mapping unit, for determining mapping moneys of the DM-RS in present sub-frame according to DM-RS resource mapping methods Source, the DM-RS mappings resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame Resource Unit RE, N in OFDM symbol are the integer not less than 1；
Data transmission unit, for mapping resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame It is transmitted.
In scheme provided in an embodiment of the present invention, have DM-RS's in the control area of subframe is top n OFDM symbol Mapping resource so that the channel-estimation information in top n OFDM symbol can be by the DM-RS of transmission in N number of OFDM symbol Carry out interpolation calculation to obtain, it is to avoid carry out extrapolation algorithm by the DM-RS of distance N number of symbol limited row farther out in time domain Obtain, so as to improve the data demodulation performance of NCT, and ensure DwPTS only comprising also being deposited in 3 special subframes of OFDM symbol In DM-RS transmission, and then make that in these special subframes downlink data can be transmitted, so as to improve the efficiency of transmission and frequency of NCT Spectrum utilization rate.
Brief description of the drawings
Fig. 1 is the multiplexing relation schematic diagram of control area and data area in a descending sub frame in the prior art；
Fig. 2 a are CRS resource mapping method schematic diagrames in the prior art under routine CP；
Fig. 2 b are to extend the CRS resource mapping method schematic diagrames under CP in the prior art；
Fig. 3 a are DM-RS resource mapping method schematic diagrames in the prior art under routine CP；
Fig. 3 b are to extend the DM-RS resource mapping method schematic diagrames under CP in the prior art；
Fig. 4 is method flow schematic diagram provided in an embodiment of the present invention；
Fig. 5 is other method schematic flow sheet provided in an embodiment of the present invention；
Fig. 6 a~Fig. 6 j are the DM-RS resource impact schematic diagrames of the embodiment of the present invention one；
Fig. 7 a~Fig. 7 i are the DM-RS resource impact schematic diagrames of the embodiment of the present invention two；
Fig. 8 a~Fig. 8 c are the DM-RS resource impact schematic diagrames of the embodiment of the present invention three；
Fig. 9 a~Fig. 9 c are the DM-RS resource impact schematic diagrames of the embodiment of the present invention four；
Figure 10 a~Figure 10 i are the DM-RS resource impact schematic diagrames of the embodiment of the present invention five；
Figure 11 a~Figure 11 d are the DM-RS resource impact schematic diagrames of the embodiment of the present invention six；
Figure 12 a~Figure 12 d are the DM-RS resource impact schematic diagrames of the embodiment of the present invention seven；
Figure 13 is device structure schematic diagram provided in an embodiment of the present invention；
Figure 14 is another device structure schematic diagram provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention provides a kind of DM-RS transmission methods suitable for NCT carrier waves, in this method, in the control of subframe Region processed is the mapping resource that there is DM-RS in top n OFDM symbol so that the channel-estimation information in top n OFDM symbol Interpolation calculation can be carried out by the DM-RS transmitted in N number of OFDM symbol to obtain, it is to avoid by the distance in time domain, this is N number of The DM-RS of symbol limited row farther out carries out extrapolation algorithm and obtains, and so as to improve the data demodulation performance of NCT, and ensures DwPTS there is also DM-RS transmission in only including 3 special subframes of OFDM symbol, and then make to be passed in these special subframes Defeated downlink data, so as to improve the efficiency of transmission and the availability of frequency spectrum of NCT.
Referring to Fig. 4, the DM-RS transmission methods for end side provided in an embodiment of the present invention are comprised the following steps：
Step 40：Terminal determines mapping resources of the DM-RS in present sub-frame, the DM- according to DM-RS resource mapping methods Resource Unit in RS mappings resource at least at least one of top n OFDM symbol including present sub-frame OFDM symbol (RE), N is the integer not less than 1；
Step 41：Mapping resource of the terminal according to the DM-RS for determining in present sub-frame, transmits in acquisition present sub-frame DM-RS, that is, obtain it is determined that mapping resource on the DM-RS that receives.
In step 40, terminal determines mapping resources of the DM-RS in present sub-frame according to DM-RS resource mapping methods, tool Body is realized can be using one of following four kinds of methods：
Method one：Terminal is based on the DM-RS resource impact sides defined in the rule made an appointment and LTE system version 10 Formula, by the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system Part RE in the DM-RS antenna port defined in version 10 in the corresponding RE set of DM-RS, moves to the preceding N of the subframe In at least one of individual OFDM symbol OFDM symbol, the RE after the movement and remaining RE not moved is working as DM-RS Mapping resource in preceding subframe on the antenna port；
I.e. based on the corresponding DM-RS resource mapping methods of each DM-RS antenna port in Rel-10, do not changing DM-RS On the basis of resource overhead (neither increasing DM-RS mappings resource), moved by the position for mapping existing DM-RS resource, example As time domain and/or frequency domain are translated, the part DM-RS in the subframe that the DM-RS resource mapping methods are determined maps resource Move on at least one OFDM symbol in the top n OFDM symbol of the subframe；Said process can be regarded as UE obtain currently The process of the DM-RS resource mapping methods for needing to use, and according to the corresponding RE of DM-RS in the DM-RS resource mapping methods Position, determines that DM-RS maps resource, or said process can also be regarded as UE is based on the DM-RS defined in Re-10 in itself Method for mapping resource, by predetermined translation, directly obtains DM-RS mapping resources；Wherein DM-RS maps the specific table of resource It is now the RE of correspondence DM-RS；
Preferably, comprising DM-RS mapping resources in the subframe for Rel-10DM-RS resource mapping methods being determined DM-RS mapping resources on part OFDM in OFDM, by time domain and/or translation, move to the top n OFDM in the subframe In 1 in symbol or 2 OFDM symbols, wherein, the DM-RS mappings resource in different OFDM symbols moves to top n OFDM In different OFDM symbol in symbol.
Method two：Terminal is based on the DM-RS resource impact sides defined in the rule made an appointment and LTE system version 10 In at least one of formula, the top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Increase the RE that transmission DM-RS is used, by the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of DM-RS, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE and The corresponding RE of DM-RS are by the translation in time domain and/or frequency domain in the DM-RS antenna port defined in LTE system version 10 The corresponding RE of DM-RS afterwards, as mapping resources of the DM-RS on the antenna port in present sub-frame；
I.e. based on the corresponding DM-RS resource mapping methods of each DM-RS antenna port in Rel-10, before a subframe Increase DM-RS mapping resources at least one OFDM symbol in N number of OFDM symbol；Said process can be regarded as UE obtain The process of DM-RS resource mapping methods for using is currently needed for, and according to the DM-RS correspondences in the DM-RS resource mapping methods RE positions, determine DM-RS map resource；Or said process can also be regarded as UE is based on defined in Re-10 in itself DM-RS method for mapping resource, by increasing DM-RS resource operations, directly obtains DM-RS mapping resources；
Preferably, based on Rel-10DM-RS resource mapping methods, according to all in the DM-RS resource mapping methods or Sub-carrier positions where part DM-RS mapping resources, the 1 or 2 adjacent OFDM symbol in a subframe top n OFDM Increase DM-RS mapping resources on number.
Method three：Terminal is true according to the configuration information by being carried in high-level signaling or Physical Downlink Control Channel (PDCCH) Determine DM-RS resource mapping methods, and determine that DM-RS is passed in present sub-frame according to the DM-RS resource mapping methods of the determination Mapping resource on the antenna port at defeated place, wherein, the configuration information indicates a kind of DM-RS resource mapping methods, or indicates In one top n OFDM symbol of subframe resource is mapped with the presence or absence of DM-RS；
I.e. terminal passes through high-level signaling or PDCCH reception configuration information, and according to the specific instruction of the configuration information, it is determined that Actually used DM-RS resource mapping methods；Wherein, the configuration information can indicate a kind of specific DM-RS resource impacts Mode, the DM-RS resource mapping methods are what is pre-defined in system, and UE is determined in the system indicated using the configuration information It is a kind of in pre-defined various DM-RS resource mapping methods；Or, the configuration information also can indicate that top n OFDM is accorded with Resource is mapped with the presence or absence of DM-RS in number, UE can be according to the configuration information various DM-RS moneys pre-defined in systems Select to meet one kind that configuration is indicated in the mapping mode of source, or in the presence of configuration information instruction, UE is according to predetermined movement side The mode (such as above-mentioned method 2) of formula (such as above-mentioned method 1) or increase DM-RS resources, in the DM-RS resource impacts of Rel-10 definition Currently used DM-RS resource mapping methods are formed on the basis of mode, and according to the DM- in the DM-RS resource mapping methods The corresponding RE positions of RS, determine that DM-RS maps resource, or on the basis of the DM-RS resource mapping methods of Rel-10 definition Directly determine DM-RS mapping resources；When configuration information indicates not existing, UE determines the DM-RS resources defined using Rel-10 Mapping mode.
Method four：Terminal determines that DM-RS is transmitted in present sub-frame according to pre-defined DM-RS resource mapping methods Mapping resource on the antenna port at place, the pre-defined DM-RS resource mapping methods at least meet：In a subframe Top n OFDM symbol at least one OFDM symbol on exist DM-RS mapping resource.
I.e. terminal need not further form the DM-RS resource mapping methods of needs, can be used directly and determined in system The DM-RS resource mapping methods for meeting above-mentioned condition of justice, according to the corresponding RE of DM-RS in the DM-RS resource mapping methods Position, determines that DM-RS maps resource.
Specifically, terminal determines DM-RS resource impact sides according to the configuration information by being carried in high-level signaling or PDCCH Formula, and according to the DM-RS resource mapping methods of the determination, determine mapping resources of the DM-RS in present sub-frame, implement Can one of following four kinds of schemes：
Scheme one：Terminal determines the top n of present sub-frame according to the configuration information carried in high-level signaling or PDCCH In OFDM symbol with the presence or absence of DM-RS map resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version DM-RS resource mapping methods defined in sheet 10, by the translation in time domain and/or frequency domain, the DM-RS transmission in present sub-frame On the antenna port at place, by the corresponding RE set of DM-RS in the DM-RS antenna port defined in LTE system version 10 Part RE, move at least one of the top n OFDM symbol of subframe OFDM symbol, by the RE after movement and not Mobile remaining RE, as mapping resources of the DM-RS on the antenna port in present sub-frame；
Scheme two：Terminal determines the top n of present sub-frame according to the configuration information carried in high-level signaling or PDCCH In OFDM symbol with the presence or absence of DM-RS map resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version DM-RS resource mapping methods defined in sheet 10, the top n on the antenna port where DM-RS transmission in present sub-frame Increase the RE that transmission DM-RS is used at least one of OFDM symbol OFDM symbol, by increased RE and LTE system version The corresponding RE of DM-RS in the DM-RS antenna port defined in sheet 10, as DM-RS on the antenna port in present sub-frame Mapping resource, or, by the DM-RS antenna port defined in increased RE and LTE system version 10 DM-RS correspondence RE by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain, as DM-RS in present sub-frame the antenna end Mapping resource on mouth；
Scheme three：Terminal according in high-level signaling or PDCCH carry configuration information, from pre-defined various DM-RS A kind of pre-defined DM-RS resource mapping methods indicated by the configuration information are selected in resource mapping method, and according to choosing The pre-defined DM-RS resource mapping methods selected, determine DM-RS on the antenna port where transmission in present sub-frame Mapping resource；
Scheme four：Terminal determines the top n of present sub-frame according to the configuration information carried in high-level signaling or PDCCH In OFDM symbol with the presence or absence of DM-RS map resource, when it is determined that in the presence of, from pre-defined various DM-RS resource impact sides Select the presence of a kind of pre-defined DM-RS resources that DM-RS maps resource in a top n OFDM symbol for subframe in formula Mapping mode, and according to the pre-defined DM-RS resource mapping methods of selection, determine that DM-RS is transmitted in present sub-frame Mapping resource on the antenna port at place；
Specifically, in the above method four or scheme three or scheme four, when terminal is according to pre-defined DM-RS resources Mapping mode, when determining mapping resources of the DM-RS in present sub-frame, pre-defined DM-RS resource mapping methods are specially One of following three kinds of modes：
Mode one：By the translation in time domain and/or frequency domain, will be every defined in LTE system version 10 in a subframe Part RE in individual DM-RS antenna port in DM-RS corresponding RE set, before moving in a subframe on the antenna port In at least one of N number of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；
Mode two, based on the corresponding DM-RS resource impacts of each DM-RS antenna port defined in LTE system version 10 Increase DM-RS pairs at least one of mode, the top n OFDM symbol on the antenna port in subframe OFDM symbol The RE for answering, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10, as The DM-RS resource mapping methods that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained, or, will be increased The corresponding RE of DM-RS are by time domain and/or frequency domain in the DM-RS antenna port defined in RE and LTE system version 10 Translation after the corresponding RE of DM-RS, as the DM- that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained RS resource mapping methods；
Mode three, meets in each DM-RS antenna port in a subframe, there is the OFDM that DM-RS maps resource Symbol is non-conterminous, and exists in the OFDM symbol of DM-RS mapping resources and there is at least 1 group DM-RS mapping resource, every group of DM-RS Mapping resource is made up of the RE that at least 2 adjacent sub-carriers of correspondence are numbered.
Specifically, using the above method one or scheme one or mode for the moment, terminal is according to the DM-RS for determining in step 41 Mapping resource, obtains the DM-RS transmitted in present sub-frame, can reuse the corresponding DM-RS antenna port pair of Rel-10 definition The time domain orthogonal frequency expansion sequence answered despreads to DM-RS, with ensure use same asset mapping mode antenna port it Between orthogonality, implementing can be as follows：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission DM-RS is made 4 RE of same subcarrier number or adjacent sub-carrier numbering are corresponded in RE as one group, to what is transmitted on every group of RE The corresponding length of DM-RS is defined using LTE system version 10, current DM-RS antenna port is 4 time domain orthogonal frequency expansion sequence Despread, to obtain the DM-RS transmitted on current antenna port.
Specifically, using the above method one or scheme one or mode for the moment, in step 41, terminal is according to the DM- for determining RS maps resource, obtains the DM-RS transmitted in present sub-frame, can reuse the corresponding DM-RS antenna port of Rel-10 definition Corresponding time domain orthogonal frequency expansion sequence despreads to DM-RS, to ensure to use the antenna port of same asset mapping mode Between orthogonality, implementing can be as follows：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE conducts that the transmission DM-RS of same subcarrier number is used are corresponded to One group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM- of the same subcarrier number of correspondence Used as one group, the DM-RS to being transmitted on every group of RE uses the definition of LTE system version 10, current DM- to 2 RE that RS is used The corresponding length of RS antenna ports is that 2 time domain orthogonal frequency expansion sequence is despread, and transmitted on current antenna port with being obtained DM-RS；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE that the transmission DM-RS that correspondence adjacent sub-carrier is numbered is used are used as one Group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM-RS institutes of correspondence adjacent sub-carrier numbering 2 RE for using as one group, on every group of RE transmit DM-RS using LTE system version 10 define, current DM-RS days Mouthful corresponding length of line end is that 2 time domain orthogonal frequency expansion sequence is despread, to obtain the DM- transmitted on current antenna port RS；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the same height of correspondence is carried Used as one group, the DM-RS to being transmitted on every group of RE uses LTE system version 10 to 2 RE that the transmission DM-RS of ripple numbering is used Definition, the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 2 despread, it is current to obtain The DM-RS transmitted on antenna port；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be mapped comprising DM-RS Transmission DM-RS on each OFDM of resource is used and most adjacent two RE on frequency domain as one group, to every group Time domain that the DM-RS transmitted on RE is defined using LTE system version 10, that the corresponding length of current DM-RS antenna port is 2 is just Frequency expansion sequence is handed over to be despread, to obtain the DM-RS transmitted on current antenna port.
Specifically, using the above method two or scheme two or mode two when, in step 41, terminal according to determine DM- RS maps resource, obtains the DM-RS transmitted in present sub-frame, and implementing can be as follows：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission is included by first four In the OFDM symbol of the RE that DM-RS is used, the transmission DM-RS institutes of the same subcarrier number of correspondence or adjacent sub-carrier numbering 4 RE for using (correspond to original Rel-10 in four OFDM symbols of the RE used comprising transmission DM-RS afterwards as one group When the DM-RS of the DM-RS of resource mapping method or correspondence original Rel-10 resource mapping methods passes through/after frequency domain translates DM-RS), 4 RE that the transmission DM-RS of the same subcarrier number of correspondence or adjacent sub-carrier numbering is used are used as one group；
DM-RS to being transmitted on one of which RE uses the definition of LTE system version 10, current DM-RS antenna port pair The length answered is that 4 time domain orthogonal frequency expansion sequence is despread, and the DM-RS to being transmitted on another group of RE is used to LTE system The definition of version 10, the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 4 obtains after entering line translation Time domain orthogonal frequency expansion sequence is despread, to obtain the DM-RS transmitted on current antenna port.
Preferably, it is right to 1 group of DM-RS in former Rel-10 resource mapping methods using the orthogonal sequence in original Rel-10 Only 1 group DM-RS of the part comprising the DM-RS in original Rel-10 resource mapping methods uses the orthogonal sequence after conversion, to ensure With the compatibility of legacy terminals.
If preferably, increase transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame being made RE, then the time domain orthogonal frequency expansion sequence that obtains is after converting：LTE system version 10 is defined, length be 4 time domain just After handing over the first two spreading factor and latter two spreading factor exchange position of frequency expansion sequence, the time domain orthogonal frequency expansion sequence for obtaining； Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, The time domain orthogonal frequency expansion sequence that obtains is after then converting：LTE system version 10 is defined, length is 4 time domain orthogonal spread spectrum Last spreading factor in sequence moves the time domain orthogonal for obtaining as first spreading factor after other spreading factors order Frequency expansion sequence, or, LTE system version 10 is defined, length be first in 4 time domain orthogonal frequency expansion sequence spread spectrum because Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining son.
Specifically, when the above method two or scheme two or mode two, in step 41, terminal is according to the DM-RS mappings for determining Resource, obtains the DM-RS transmitted in present sub-frame, and implementing can be as follows：
For extension CP, if increasing transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, will be used comprising transmission DM-RS RE multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier are compiled Number 2 RE being used of transmission DM-RS as one group, the DM-RS to being transmitted on every group of RE is defined using LTE system version 10 The corresponding length of current DM-RS antenna port be that 2 time domain orthogonal frequency expansion sequence is despread, to obtain current antenna end The DM-RS transmitted on mouth；Or,
For extension CP, if increasing transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, defined in LTE system version 10 , the DM-RS transmitted on the RE that are used of DM-RS is transmitted in current DM-RS antenna port, defined according to LTE system version 10 Mode despread, with obtain on the antenna port transmit DM-RS；And,
To increase in the OFDM symbol of RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS institutes on frequency domain Used as one group, the DM-RS transmitted on every group of RE uses the definition of LTE system version 10, current DM-RS antennas to 2 RE for using The corresponding length in port is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM that will increase the RE for having transmission DM-RS to be used is accorded with Number with defined in LTE system version 10, first OFDM symbol of RE used comprising transmission DM-RS on, correspondence is same Used as one group, the DM-RS transmitted on every group of RE is used to LTE system 2 RE of individual subcarrier number or adjacent sub-carrier numbering The definition of version 10, the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 2 obtains after entering line translation Time domain orthogonal frequency expansion sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Preferably, the time domain orthogonal frequency expansion sequence obtained after conversion can be：It is by the length that LTE system version 10 is defined After two spreading factor exchange positions in 2 time domain orthogonal frequency expansion sequence, the length for obtaining is 2 time domain orthogonal spread spectrum sequence Row.
Specifically, when using aforesaid way three, in step 41, terminal maps resource according to the DM-RS for determining, obtains and works as The DM-RS transmitted in preceding subframe, implementing can be as follows：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In multiple OFDM symbols of the RE for being used, two adjacent the 4 of subcarrier number RE are corresponded to as one group, on every group of RE The DM-RS of transmission is expanded using the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 Frequency sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Specifically, when using aforesaid way three, in step 41, terminal maps resource according to the DM-RS for determining, obtains and works as The DM-RS transmitted in preceding subframe, implementing can be as follows：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In each OFDM symbol for the RE for being used, two adjacent the 2 of subcarrier number RE are corresponded to as one group, on every group of RE The corresponding length of the DM-RS of transmission is defined using LTE system version 10, current DM-RS antenna port is that 2 time domain orthogonal expands Frequency sequence is despread, to obtain the DM-RS transmitted on the antenna port.
In this method, present sub-frame is the special son of conventional descending sub frame or correspondence any one TDD special subframe configuration Frame.
When present sub-frame is conventional descending sub frame, N is the positive integer no more than 4；And/or, it is special in present sub-frame During subframe, N is the positive integer no more than 2 or 3.
Terminal and the holistic approach flow of base station interaction are as follows：
Step one：Base station determines mapping resources of the DM-RS in present sub-frame, DM-RS according to DM-RS resource mapping methods RE in mapping resource at least at least one of top n OFDM symbol including present sub-frame OFDM symbol, N is not less than 1 Integer；
Step 2：Base station maps resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame and is transmitted；
Step 3：Terminal determines mapping resources of the DM-RS in present sub-frame, DM-RS according to DM-RS resource mapping methods RE in mapping resource at least at least one of top n OFDM symbol including present sub-frame OFDM symbol, N is not less than 1 Integer；
Step 4：Terminal maps resource according to the DM-RS for determining, obtains the DM-RS transmitted in present sub-frame.
Need to ensure that the DM-RS resource mapping methods that base station uses are consistent with the DM-RS resource mapping methods that terminal is used.
Referring to Fig. 5, the DM-RS transmission methods for base station side provided in an embodiment of the present invention are comprised the following steps：
Step 50：Base station determines mapping resources of the DM-RS in present sub-frame, DM-RS according to DM-RS resource mapping methods RE in mapping resource at least at least one of top n OFDM symbol including present sub-frame OFDM symbol, N is not less than 1 Integer；
Step 51：Base station maps resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame and is transmitted, i.e., It is determined that DM-RS mappings transmitted over resources DM-RS.
In step 50, base station determines mapping resources of the DM-RS in present sub-frame according to DM-RS resource mapping methods, tool Body is realized can be using one of following four kinds of methods：
Method one：Base station is based on the DM-RS resource impact sides defined in the rule made an appointment and LTE system version 10 Formula, by the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system Part RE in the DM-RS antenna port defined in version 10 in the corresponding RE set of DM-RS, moves to the preceding N of the subframe In at least one of individual OFDM symbol OFDM symbol, the RE after the movement and remaining RE not moved is working as DM-RS Mapping resource in preceding subframe on the antenna port；
Method two：Base station is based on the DM-RS resource impact sides defined in the rule made an appointment and LTE system version 10 In at least one of formula, the top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Increase the RE that transmission DM-RS is used, by the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of DM-RS, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE and The corresponding RE of DM-RS are by the translation in time domain and/or frequency domain in the DM-RS antenna port defined in LTE system version 10 The corresponding RE of DM-RS afterwards, as mapping resources of the DM-RS on the antenna port in present sub-frame；
Method three：Base station determines a kind of DM-RS resource mapping methods according to actual needs, according to the DM-RS resource impacts Mode, determines mapping resources of the DM-RS on the antenna port where transmission in present sub-frame, and by high-level signaling or physics To terminal send configuration information, the configuration information indicates a kind of DM-RS resource mapping methods to down control channel PDCCH, or refers to Show in a top n OFDM symbol for subframe and map resource with the presence or absence of DM-RS；
Method four：Base station determines that DM-RS is transmitted in present sub-frame according to pre-defined DM-RS resource mapping methods Mapping resource on the antenna port at place, the pre-defined DM-RS resource mapping methods at least meet：In subframe There is DM-RS mapping resources at least one OFDM symbol in top n OFDM symbol.
Specifically, base station determines a kind of DM-RS resource mapping methods according to actual needs, according to the DM-RS resource impacts Mode, determine DM-RS transmit in the present sub-frame where antenna port on mapping resource, and by high-level signaling or , to terminal send configuration information, implementing can one of following three kinds of scheme for PDCCH：
Scheme one：Base station according to actual needs, is reflected in the top n OFDM symbol for determining present sub-frame with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource impacts Mode, by the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE systems Part RE in the DM-RS antenna port defined in system version 10 in the corresponding RE set of DM-RS, before moving to the subframe In at least one of N number of OFDM symbol OFDM symbol, the RE after the movement and remaining RE not moved exists as DM-RS Mapping resource in present sub-frame on the antenna port, and sent for indicating one to terminal by high-level signaling or PDCCH With the presence or absence of the configuration information (be specifically designated as exist) of DM-RS mapping resources in the top n OFDM symbol of subframe；
Scheme two：Base station according to actual needs, is reflected in the top n OFDM symbol for determining present sub-frame with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource impacts At least one of mode, the top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol It is upper to increase the RE that transmission DM-RS is used, by the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of upper DM-RS, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE with And in the DM-RS antenna port defined in LTE system version 10 the corresponding RE of DM-RS by flat in time domain and/or frequency domain The corresponding RE of DM-RS after shifting, as mapping resources of the DM-RS on the antenna port in present sub-frame, and are believed by high level Order or PDCCH are sent for indicating to map matching somebody with somebody for resource with the presence or absence of DM-RS in a top n OFDM symbol for subframe to terminal Confidence breath (be specifically designated as exist)；
Scheme three：Base station selects a kind of pre- from pre-defined various DM-RS resource mapping methods according to actual needs The DM-RS resource mapping methods for first defining, according to the pre-defined DM-RS resource mapping methods of selection, determine that DM-RS exists The mapping resource on antenna port where being transmitted in present sub-frame, and sent to terminal by high-level signaling or PDCCH and be used for The configuration information of a kind of pre-defined DM-RS resource mapping methods of selection is indicated, or by high-level signaling or PDCCH to end End sends and (is referred specifically to for the configuration information in one top n OFDM symbol of subframe of instruction with the presence or absence of DM-RS mapping resources It is shown as existing).
Specifically, when base station is according to pre-defined DM-RS resource mapping methods, determining DM-RS in present sub-frame During mapping resource, one of the as follows definition of pre-defined DM-RS resource mapping methods：
Mode one：By the translation in time domain and/or frequency domain, will be every defined in LTE system version 10 in a subframe Part RE in individual DM-RS antenna port in DM-RS corresponding RE set, before moving in a subframe on the antenna port In at least one of N number of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；
Mode two：Based on the corresponding DM-RS resource impacts of each DM-RS antenna port defined in LTE system version 10 Increase DM-RS pairs at least one of mode, the top n OFDM symbol on the antenna port in subframe OFDM symbol The RE for answering, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10, as The DM-RS resource mapping methods that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained, or, will be increased The corresponding RE of DM-RS are by time domain and/or frequency domain in the DM-RS antenna port defined in RE and LTE system version 10 Translation after the corresponding RE of DM-RS, as the DM- that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained RS resource mapping methods；
Mode three：Meet in each DM-RS antenna port in a subframe, there is the OFDM that DM-RS maps resource Symbol is non-conterminous, and at least 1 group of presence in the OFDM symbol is made up of the RE that at least 2 adjacent sub-carriers of correspondence are numbered DM-RS maps resource.
Specifically, using the above method one or scheme one or mode for the moment, in step 51, base station is according to the DM- for determining RS maps resource, DM-RS is mapped in present sub-frame and is transmitted, and implementing can be as follows：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission DM-RS is made 4 RE of same subcarrier number or adjacent sub-carrier numbering are corresponded in RE as one group, to what is transmitted on every group of RE The corresponding length of DM-RS is defined using LTE system version 10, current DM-RS antenna port is 4 time domain orthogonal frequency expansion sequence Spread, to transmit the DM-RS on the antenna port.
Specifically, using the above method one or scheme one or mode for the moment, in step 51, base station is according to the DM- for determining RS maps resource, DM-RS is mapped in present sub-frame and is transmitted, and implementing can be as follows：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE conducts that the transmission DM-RS of same subcarrier number is used are corresponded to One group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM- of the same subcarrier number of correspondence Used as one group, the DM-RS to being transmitted on every group of RE uses the definition of LTE system version 10, current DM- to 2 RE that RS is used The corresponding length of RS antenna ports is that 2 time domain orthogonal frequency expansion sequence is spread, and DM-RS is transmitted with the antenna port； Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE that the transmission DM-RS that correspondence adjacent sub-carrier is numbered is used are used as one Group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM-RS institutes of correspondence adjacent sub-carrier numbering 2 RE for using as one group, on every group of RE transmit DM-RS using LTE system version 10 define, current DM-RS days Mouthful corresponding length of line end is that 2 time domain orthogonal frequency expansion sequence is spread, and DM-RS is transmitted with the antenna port；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the same height of correspondence is carried Used as one group, the DM-RS to being transmitted on every group of RE uses LTE system version 10 to 2 RE that the transmission DM-RS of ripple numbering is used Definition, the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 2 spread, with the antenna end DM-RS is transmitted on mouthful；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be mapped comprising DM-RS Transmission DM-RS on each OFDM of resource is used and most adjacent two RE on frequency domain as one group, to every group Time domain that the DM-RS transmitted on RE is defined using LTE system version 10, that the corresponding length of current DM-RS antenna port is 2 is just Hand over frequency expansion sequence to be spread, DM-RS is transmitted with the antenna port.
Specifically, when using the above method two or scheme two or mode two, in step 51, base station is according to the DM- for determining RS maps resource, DM-RS is mapped in present sub-frame and is transmitted, and implementing can be as follows：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission is included by first four In the OFDM symbol of the RE that DM-RS is used, the transmission DM-RS institutes of the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, afterwards in four OFDM symbols of the RE used comprising transmission DM-RS, the same height of correspondence is carried 4 RE for using 4 RE that the transmission DM-RS that ripple is numbered or adjacent sub-carrier is numbered is used are used as one group；
The DM-RS antenna port correspondence defined using LTE system version 10 to the DM-RS transmitted on one of which RE Length be that 4 time domain orthogonal frequency expansion sequence is spread, the DM-RS to being transmitted on another group of RE is used to LTE system version 10 definition, the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 4 enter the time domain obtained after line translation Orthogonal spreading sequence is spread, to transmit the DM-RS on the antenna port.
If preferably, increase transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame being made RE, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：LTE system version 10 is defined, length be 4 when After the first two spreading factor of domain orthogonal spreading sequence and latter two spreading factor exchange position, the time domain orthogonal spread spectrum sequence for obtaining Row；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, The time domain orthogonal frequency expansion sequence for then being obtained after the conversion is：LTE system version 10 is defined, length is 4 time domain orthogonal Last spreading factor in frequency expansion sequence moves the time domain for obtaining as first spreading factor after other spreading factors order Orthogonal spreading sequence, or, LTE system version 10 is defined, length is first expansion in 4 time domain orthogonal frequency expansion sequence Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining the frequency factor.
Specifically, when using above-mentioned side two or scheme two or mode two, in step 51, base station is according to the DM-RS for determining Mapping resource, DM-RS is mapped in present sub-frame and is transmitted, and implementing can be as follows：
For extension CP, if increasing transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, will be used comprising transmission DM-RS RE multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier are compiled Number 2 RE being used of transmission DM-RS as one group, the DM-RS to being transmitted on every group of RE is defined using LTE system version 10 , the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 2 spread, with the antenna port Transmission DM-RS；Or,
For extension CP, if increasing transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, defined in LTE system version 10 , the DM-RS transmitted on the RE that are used of DM-RS is transmitted in current DM-RS antenna port, defined according to LTE system version 10 Mode spread, transmit DM-RS with the antenna port；And,
To increase in the OFDM symbol of RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS institutes on frequency domain Used as one group, the DM-RS transmitted on every group of RE uses the definition of LTE system version 10, current DM-RS antennas to 2 RE for using The corresponding length in port is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM that will increase the RE for having transmission DM-RS to be used is accorded with In number OFDM symbol of RE used comprising transmission DM-RS with first defined in LTE system version 10, correspondence is same Used as one group, the DM-RS transmitted on every group of RE is used to LTE system version 2 RE of subcarrier number or adjacent sub-carrier numbering This 10 definition, the time domain orthogonal frequency expansion sequence that the corresponding length of current DM-RS antenna port is 2 enter after line translation obtain when Domain orthogonal spreading sequence is spread, and DM-RS is transmitted with the antenna port.
Preferably, the time domain orthogonal frequency expansion sequence obtained after conversion is：LTE system version 10 is defined, length is 2 After two spreading factor exchange positions in time domain orthogonal frequency expansion sequence, the length for obtaining is 2 time domain orthogonal frequency expansion sequence.
Specifically, when using aforesaid way three, in step 51, base station maps resource according to the DM-RS for determining, by DM- RS is transmitted in being mapped to present sub-frame, and implementing can be as follows：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In multiple OFDM symbols of the RE for being used, two adjacent the 4 of subcarrier number RE are corresponded to as one group, on every group of RE The corresponding length of the DM-RS of transmission is defined using LTE system version 10, current DM-RS antenna port is that 4 time domain orthogonal expands Frequency sequence is spread, to transmit the DM-RS on the antenna port.
Specifically, when using aforesaid way three, in step 51, base station maps resource according to the DM-RS for determining, by DM- RS is transmitted in being mapped to present sub-frame, and implementing can be as follows：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In each OFDM symbol for the RE for being used, two adjacent the 2 of subcarrier number RE are corresponded to as one group, on every group of RE The corresponding length of the DM-RS of transmission is defined using LTE system version 10, current DM-RS antenna port is that 2 time domain orthogonal expands Frequency sequence is spread, to transmit the DM-RS on the antenna port.
In this method, present sub-frame is the special son of conventional descending sub frame or correspondence any one TDD special subframe configuration Frame.When present sub-frame is conventional descending sub frame, N is the positive integer no more than 4；And/or, it is special subframe in present sub-frame When, N is the positive integer no more than 2 or the positive integer no more than 3.
Preferably, configured for the TDD special subframes for not supporting DM-RS to transmit in Rel-10, such as during descending conventional CP, With setting to 0 with 5, during downbound expansion CP, TDD special subframes can be used what is obtained in the manner described above to TDD special subframes with setting to 0 with 4 Any TDD special subframes configure corresponding DM-RS resource mapping methods, are provided according to DM-RS only in OFDM symbol where DwPTS Source mapping mode sends or receives DM-RS.
Preferably, when there is CRS transmission on NCT, the DM-RS resource mapping methods in the present invention should be avoided as far as possible OFDM symbol where DM-RS mapping resources is Chong Die with the OFDM symbol comprising CRS mapping resources；Synchronously believe when existing on NCT Number transmission when, above-mentioned DM-RS resource mapping methods should avoid as far as possible DM-RS map resource where OFDM symbol with it is synchronous believe Number mapping transmission where OFDM symbol overlap.
High-level signaling in the present invention can be medium education (MAC, Media Access Control) signaling or Wireless heterogeneous networks (RRC, Radio Resource Control) signaling etc.；PDCCH signalings can be legacy PDCCH letters Make or E-PDCCH signalings etc..The antenna port of the transmission DM-RS in the present invention can be antenna port 7~14.
With reference to specific embodiment, the present invention will be described：
Embodiment one：The correspondence above method one or scheme one or mode one；
For conventional descending sub frame (descending sub frame i.e. in addition to TDD special subframes), by respective antenna in Rel-10 DM-RS mapping resources in the DM-RS resource mapping methods of port, translate by time domain, obtain as shown in Fig. 6 a to Fig. 6 j DM-RS resource mapping methods；
For example：Mode 1：By in Rel-10 first two columns DM-RS mapping resource move to the 2nd and the 3rd OFDM symbol (or 3rd and the 4th OFDM symbol) on, obtain Fig. 6 a (under conventional CP) and Fig. 6 b (under extension CP)；
Mode 2：Last row DM-RS mappings resource in Rel-10 is moved into the 2nd OFDM symbol (or the 3rd OFDM symbol) on, obtain Fig. 6 c (under conventional CP) and Fig. 6 d (under extension CP)；
Mode 3：First two columns DM-RS mappings resource in Rel-10 is moved into the 1st and the 2nd OFDM symbol (or the 2nd He 3rd OFDM symbol) on, and most next two columns DM-RS mappings resource is moved in the 2nd and the 3rd OFDM symbol reciprocal, obtain Fig. 6 e (under conventional CP) and Fig. 6 f (under extension CP)；
Mode 4：First two columns DM-RS mappings resource in Rel-10 is moved into the 2nd and the 3rd OFDM symbol (or the 1st He 2nd OFDM symbol, or the 3rd and the 4th OFDM symbol) on, and most next two columns DM-RS mappings resource is moved to reciprocal the On 4 and the 5th OFDM symbols (or the 5th and the 6th OFDM symbol reciprocal), Fig. 6 g (under conventional CP) and Fig. 6 h (extensions are obtained Under CP)；
Mode 5：First two columns DM-RS mappings resource in Rel-10 is moved into the 2nd and the 3rd OFDM symbol (or the 1st He 2nd OFDM symbol, or the 3rd and the 4th OFDM symbol) on, and most next two columns DM-RS mappings resource is moved to down respectively On number the 4th and the 2nd OFDM symbol, obtain Fig. 6 i (under conventional CP) and Fig. 6 j (under extension CP).
Mode 1 can avoid the synchronizing signal in FDD system Chong Die with DM-RS resources.
Mode 2 can avoid the synchronizing signal in TDD system Chong Die with DM-RS resources.
When assuming that not existing CRS on NCT, mode 3 can simultaneously avoid synchronizing signal and DM-RS in FDD and TDD system Resource is overlapped, or assuming that there is CRS on NCT and when CRS is different from synchronous transmission of signal subframe, definable is in synchronizing signal Occupation mode 3 in transmission subframe, other subframes can be used other modes or method.
Mode 4 and mode 5 can simultaneously avoid the synchronizing signal in FDD and TDD system Chong Die with DM-RS resources, but work as NCT On when there is CSI-RS transmission, need to limit CSI-RS DM-RS mapping resource on the ofdm symbols.
When time domain orthogonal spreads：
For conventional CP, by DM-RS resource mapping methods, same subcarrier number is corresponded in a descending sub frame DM-RS is reusing time domain that the corresponding corresponding length of DM-RS antenna port in Rel-10 is 4 to every group of DM-RS just as one group Hand over frequency expansion sequence (sequence i.e. in table 1)；
For extension CP, by DM-RS resource mapping methods, the first two includes the OFDM of DM-RS in a descending sub frame , used as one group, correspondence is same in latter two OFDM symbol comprising DM-RS for the DM-RS of the same subcarrier number of correspondence on symbol , used as one group, corresponding DM-RS antenna port is corresponding during Rel-10 is reused to every group of DM-RS for the DM-RS of individual subcarrier number Length is 2 time domain orthogonal frequency expansion sequence (sequence i.e. in table 2)；Or, by DM-RS resource mapping methods, one is descending Used as one group, latter two is included the DM-RS that correspondence adjacent sub-carrier is numbered in OFDM symbol of the first two comprising DM-RS in subframe The DM-RS of correspondence adjacent sub-carrier numbering reuses phase in Rel-10 to every group of DM-RS as one group in the OFDM symbol of DM-RS The corresponding length of DM-RS antenna port answered is 2 time domain orthogonal frequency expansion sequence (sequence i.e. in table 2), such as Fig. 6 d, To correspondence subcarrier number be the DM-RS of i and i+1 (such as k1 and k2) as one in OFDM symbol of the first two comprising DM-RS Group, uses the sequence in table 2；Or, by DM-RS resource mapping methods, same subcarrier is corresponded in a descending sub frame Used as one group, the corresponding corresponding length of DM-RS antenna port is 2 to the DM-RS of numbering during Rel-10 is reused to every group of DM-RS Time domain orthogonal frequency expansion sequence (sequence i.e. in table 2), such as, for Fig. 6 d, include DM-RS's by first with last The DM-RS of same subcarrier number is corresponded in OFDM symbol as one group, by second and the 3rd OFDM comprising DM-RS The DM-RS of the same subcarrier number of correspondence uses the sequence in table 2 as one group to every group on symbol；Or, will be described In DM-RS resource mapping methods, two DM-RS in a descending sub frame on same OFDM adjacent on frequency domain DM-RS As one group, the time domain orthogonal that the corresponding corresponding length of DM-RS antenna port in every group of DM-RS reuses Rel-10 is 2 is expanded Frequency sequence (sequence i.e. in table 2), the method goes for all OFDM symbols comprising DM-RS, or is only applicable to non- The continuous OFDM symbol comprising DM-RS, for adjacent two, the OFDM symbol comprising DM-RS is according to the method described above in time domain Direction is grouped, such as, for Fig. 6 d, the DM-RS only to first and in last OFDM symbol comprising DM-RS is in frequency domain Packet, to the 2nd and the 3rd OFDM symbol comprising DM-RS in time domain grouping；
Embodiment two：The correspondence above method one or scheme one or mode one；
For TDD special subframes, the DM-RS in the DM-RS resource mapping methods of respective antenna port in Rel-10 is reflected Resource is penetrated, is translated by time domain, obtain the DM-RS resource mapping methods as shown in Fig. 7 a to Fig. 7 i；
For example, during routine CP：Mode 1：First two columns DM-RS mappings resource in Rel-10 is moved into the 1st and the 2nd OFDM Symbol, obtains Fig. 7 a；
Mode 2：First two columns DM-RS mappings resource in Rel-10 is moved into the 1st and the 2nd OFDM symbol, and for Special subframe configuration 1/2/6/7 by next two columns DM-RS mapping resource translate backward 2 OFDM symbols (or backward translate 1 OFDM symbol), obtain Fig. 7 b；
Mode 3：First two columns DM-RS mappings resource in Rel-10 is moved into the 2nd and the 3rd OFDM symbol, Fig. 7 c are obtained；
During extension CP：Mode 1：By in Rel-10 first row DM-RS mapping resource move to the 1st OFDM symbol (or Also the 2nd or the 3rd OFDM symbol can be moved on to), obtain Fig. 7 d；
Mode 2：First row DM-RS mappings resource in Rel-10 is moved into the 1st OFDM symbol, and by secondary series DM- RS mappings resource translates 2 OFDM symbols (or translating 1 OFDM symbol backward) backward, obtains Fig. 7 e；
Mode 3：First row DM-RS mappings resource in Rel-10 is moved into the 2nd OFDM symbol, and by secondary series DM- RS mappings resource translates 2 OFDM symbols backward, obtains Fig. 7 f；
When assuming that not existing CRS in special subframe on NCT, mode 1 and mode 2 during conventional CP, side during extension CP Formula 1 can avoid the synchronizing signal in FDD system Chong Die with DM-RS resources；
When time domain orthogonal spreads：During conventional CP, can include DM-RS's by two adjacent in the time domain in a subframe DM-RS on the RE of the same subcarrier number of correspondence in OFDM symbol as 1 group, to the phase of every group of reuse Rel-10 definition The corresponding length of DM-RS antenna port answered is 2 time domain orthogonal frequency expansion sequence, i.e. sequence in table 2, to ensure using identical Orthogonality between the antenna port of resource mapping method；Such as in Fig. 7 a antenna port 7/8/11/13, OFDM numberings l=0 and DM-RS on 1 two symbols on two RE of correspondence k=k1 is 1 group, and the DM-RS on two RE of correspondence k=k6 is 1 group, right It is 1 group to answer the DM-RS on two RE of k=k11；During extension CP, by OFDM symbol of two in a subframe comprising DM-RS On the same subcarrier number of correspondence RE on DM-RS as 1 group, to the corresponding DM- of every group of reuse Rel-10 definition The corresponding length of RS antenna ports is the sequence in 2 time domain orthogonal frequency expansion sequence, i.e. table 2；Such as in Fig. 7 d OFDM numberings l= DM-RS on 0 and 5 two symbol on two RE of correspondence k=k1 is 1 group, and the DM-RS on two RE of correspondence k=k4 is 1 Group, the DM-RS on two RE of correspondence k=k7 is 1 group, and the DM-RS on two RE of correspondence k=k10 is 1 group.
It should be noted that in above-described embodiment one and embodiment two, if being further introduced into frequency domain translation, such as in frequency A subcarrier number is represented to each k in high frequency or low frequency part translation A subcarrier, i.e. figure on domain, this is also contained in In method, such as on the basis of above-mentioned Fig. 6 d, frequency domain translation is further carried out, obtain the resource as shown in Fig. 7 g to Fig. 7 i and reflect Shooting method.
Embodiment three：The correspondence above method two or scheme two or mode two；
For conventional descending sub frame, in descending conventional CP, reflected according to the DM-RS resources of respective antenna port in Rel-10 The sub-carrier positions where DM-RS mappings resource in mode are penetrated, DM- is increased in the 2nd and the 3rd OFDM symbol in a subframe RS maps resource, obtains DM-RS resource mapping methods as shown in Figure 8 a；
In downbound expansion CP, according in the DM-RS resource mapping methods of respective antenna port in Rel-10 include DM-RS Sub-carrier positions where mapping the DM-RS mapping resources in the first two or latter two OFDM symbol of resource, in a subframe In increase DM-RS mapping resources in the 2nd and the 3rd OFDM symbol, obtain the DM-RS resource impact sides as shown in Fig. 8 b or Fig. 8 c Formula；Or can also in the OFDM symbol of the 1st and the 2nd in a subframe, or in the 3rd and the 4th OFDM symbol, according to Aforesaid way increases DM-RS mapping resources.
When time domain orthogonal spreads：For Fig. 8 a, by correspondence in the OFDM symbol of numbering l=1,2,5,6 in first time slot The DM-RS of same subcarrier number as one group, to 4 DM-RS in every group using after the evolution shown in table 3 just Sequence is handed over, by numbering l=5,6 OFDM symbol and numbering l=5,6 OFDM symbol in second time slot in first time slot Used as another group, 4 DM-RS in every group use the orthogonal expansion in Rel-10 to the DM-RS of the upper same subcarrier number of correspondence Frequency sequence；For Fig. 8 b, Fig. 8 c, (OFDM symbol of numbering l=1 and 2, compiles two adjacent OFDM symbols in i.e. first time slot The OFDM symbol of number l=4 and 5, the OFDM symbol of numbering l=4 and 5 in second time slot) on the same subcarrier number of correspondence DM-RS be respectively one group, the orthogonal spreading sequence in 2 DM-RS symbol use tables 2 in every group.
Table 3：Under conventional CP, the DM-RS orthogonal sequences of different antennae port
Example IV：The correspondence above method two or scheme two or mode two；
For conventional descending sub frame, in descending conventional CP, reflected according to the DM-RS resources of respective antenna port in Rel-10 The sub-carrier positions where DM-RS mappings resource in mode are penetrated, increasing DM-RS in the 2nd OFDM symbol in a subframe reflects Resource is penetrated, DM-RS resource mapping methods as illustrated in fig. 9 are obtained；
In downbound expansion CP, according in the DM-RS resource mapping methods of respective antenna port in Rel-10 include DM-RS Sub-carrier positions where mapping the DM-RS mapping resources in the first two or latter two OFDM symbol of resource, in a son Increase DM-RS mapping resources in frame in 2nd OFDM symbol, obtain the DM-RS resource mapping methods as shown in Fig. 9 b or Fig. 9 c； Or, it is also possible in the subframe in the 1st or the 3rd or the 4th OFDM symbol, DM- is increased in the manner described above RS maps resource.
Time domain orthogonal spreads：For Fig. 9 a, in first time slot in OFDM and second time slot of numbering l=1,5,6 The DM-RS of the same subcarrier number of correspondence is used as one group in the OFDM symbol of numbering l=5, numbering l=5 in first time slot, The DM-RS of same subcarrier number is corresponded in 6 OFDM symbol and second time slot in numbering l=5,6 OFDM symbol It is another group, the sequence in 4 DM-RS symbol use tables 4 in every group；For Fig. 9 b, Fig. 9 c, for former Rel-10DM-RS Mapping resource, according in Rel-10 packet mode reuse Rel-10 in corresponding orthogonal spreading sequence, will first when It is one group that the DM-RS of correspondence same sub-carrier numbering divides in numbering l=4,5 OFDM symbol in gap, will be compiled in second time slot DM-RS points of correspondence same sub-carrier numbering is one group in number l=4,5 OFDM symbol, respectively to 2 DM-RS in every group Using the sequence in table 2, the DM-RS in OFDM symbol for the l=1 in first time slot is divided into one two-by-two on frequency domain The DM-RS of correspondence k=k2 and k=k5 is 1 group in group, such as Fig. 9 c, and the DM-RS of correspondence k=k8 and k=k11 is 1 group, every group In 2 DM-RS use the sequence in table 2；Or, for Fig. 9 b, by the numbering l=1 in first time slot, 4 OFDM symbols DM-RS points of number upper correspondence same sub-carrier numbering is one group, and the evolution shown in table 5 is used to 2 DM-RS in every group Orthogonal sequence afterwards, by DM-RS points of correspondence same sub-carrier numbering in numbering l=4,5 OFDM symbol in first time slot It is one group, DM-RS points by correspondence same sub-carrier numbering in numbering l=4,5 OFDM symbol in second time slot is one group, Sequence in Rel-10 is used to 2 DM-RS in every group.
Table 4：Under conventional CP, the DM-RS orthogonal sequences of different antennae port
Table 5：Under extension CP, the DM-RS orthogonal sequences of different antennae port
Embodiment five：The correspondence above method two or scheme two or mode two；
For TDD special subframes, in downbound expansion CP, reflected according to the DM-RS resources of respective antenna port in Rel-10 The sub-carrier positions where DM-RS mappings resource in mode are penetrated, DM- is increased in the 1st and the 2nd OFDM symbol in a subframe RS maps resource, obtains DM-RS resource mapping methods as shown in Figure 10 a, or the 2nd and the 3rd OFDM in a subframe Increase DM-RS mapping resources on symbol, obtain DM-RS resource mapping methods as shown in fig. lob, or the in a subframe Increase DM-RS mapping resources in 1 OFDM symbol, obtain DM-RS resource mapping methods as shown in figure l0c, or at one In subframe in the 2nd OFDM symbol increase DM-RS mapping resource, obtain as shown in fig. 10d DM-RS resource mapping methods ( Can in the manner described above increase in the 3rd OFDM symbol DM-RS mapping resource), or, it is above-mentioned according to Rel-10 in phase The sub-carrier positions where DM-RS mappings resource in the DM-RS resource mapping methods of antenna port are answered, the 1st in a subframe On the basis of the DM-RS pattern obtained after increase DM-RS mapping resources in the 2nd OFDM symbol, further to Rel- DM-RS mappings resource carries out the translation of time domain/frequency domain in the DM-RS resource mapping methods of respective antenna port in 10, for example will The DM-RS of respective antenna port maps resource to two OFDM symbols of right translation in former Rel-10, obtains as illustrated in figure 10e DM-RS resource mapping methods；Or,
For TDD special subframes, in downbound expansion CP, in the 1st and the 2nd OFDM symbol in a subframe relative to The DM-RS sub-carrier positions of respective antenna port translate up 1 frequency domain position of sub- subcarrier unit on frequency domain in Rel-10 Increase DM-RS mapping resources, obtain DM-RS resource mapping methods as shown in figure 10f, or the 1st and the 2nd in a subframe 1 son is translated downwards on frequency domain in OFDM symbol relative to the DM-RS sub-carrier positions of respective antenna port in Rel-10 to carry The frequency domain position of ripple unit increases DM-RS mapping resources, obtains the DM-RS resource mapping methods as shown in Figure 10 g；Or,
For TDD special subframes, in downbound expansion CP, in the 1st and the 2nd OFDM symbol in a subframe relative to The DM-RS sub-carrier positions of respective antenna port translate up 1 frequency domain position of sub- subcarrier unit on frequency domain in Rel-10 Increase DM-RS mapping resources, and further by the DM-RS mapping resources of respective antenna port in former Rel-10 to right translation two OFDM symbol, obtains the DM-RS resource mapping methods as shown in Figure 10 h, or the 1st and the 2nd OFDM symbol in a subframe On relative to respective antenna port in Rel-10 DM-RS sub-carrier positions on the frequency domain downwards on translate 1 sub- subcarrier unit Frequency domain position increase DM-RS mapping resource, and further by former Rel-10 respective antenna port DM-RS mapping resource to Two OFDM symbols of right translation, obtain the DM-RS resource mapping methods as shown in Figure 10 i.
When time domain orthogonal spreads：Resource is mapped for former Rel-10DM-RS, is reused according to the packet mode in Rel-10 Corresponding orthogonal spreading sequence in Rel-10, i.e., the identical sub- load of correspondence in numbering l=4,5 OFDM symbol in first time slot DM-RS points of ripple numbering is one group, uses the orthogonal spreading sequence that the length in Rel-10 is 2；For Figure 10 a or Figure 10 b or Figure 10 e or Figure 10 f or Figure 10 g, newly increase the OFDM symbol or the OFDM of l=1 and 2 of the numbering l=0 and 1 of DM-RS mapping resources Used as one group, 2 DM-RS symbols in every group are used in Rel-10 the DM-RS of the same subcarrier number of correspondence on symbol Length is 2 orthogonal spreading sequence；The DM-RS in the 1st or the 2nd OFDM symbol for Figure 10 c and Figure 10 d increases DM-RS It is divided into one group two-by-two on frequency domain, the DM-RS for for example corresponding to k=k1 and k=k4 is 1 group, the DM- of correspondence k=k7 and k=k10 RS is 1 group, and 2 DM-RS in every group use the sequence in table 2, or, by numbering l=0,4 OFDM symbols in first time slot DM-RS points of correspondence same sub-carrier numbering is in number (corresponding diagram 10c) or numbering l=1,4 OFDM symbol (corresponding diagram 10d) One group, 2 DM-RS in every group use the orthogonal sequence after the evolution shown in table 5, by numbering l=in first time slot 4th, it is one group that the DM-RS of correspondence same sub-carrier numbering divides in 5 OFDM symbol, and 2 DM-RS in every group are used in Rel-10 Length be 2 orthogonal spreading sequence.
Embodiment six：Correspondence aforesaid way three；
For conventional descending sub frame, the DM-RS resource mapping methods shown in Figure 11 a~Figure 11 d can be used；Or, also may be used With the same frequency position in as illustrated, (conventional CP can also be for the 1st or the 3rd OFDM symbol in first time slot In first the 4th of time slot the OFDM symbol), in the second-to-last OFDM symbol in second time slot or second time slot (conventional CP can also be in second the 4th of time slot the OFDM symbol) places DM-RS in 1st or the 2nd or the 3rd OFDM symbol Mapping resource.
When time domain orthogonal spreads：For Figure 11 a, by correspondence phase in two OFDM symbols comprising DM-RS in a subframe Two adjacent DM-RS of subcarrier number as one group, such as antenna port 7/8/11/13, numbering l in first time slot Correspondence subcarrier number is k2's and k3 in=1 OFDM symbol and in second time slot in the OFDM symbol of numbering l=5 DM-RS as 1 group, for antenna port 9/10/12/14, in first time slot in the OFDM symbol of numbering l=1 and second DM-RS of the subcarrier number for k0 and k1 is corresponded in individual time slot in the OFDM symbol of numbering l=5 as 1 group, 4 in every group Orthogonal spreading sequence in DM-RS symbol use tables 1；For Figure 11 b~Figure 11 d, by each in a subframe comprising DM-RS Two adjacent DM-RS of subcarrier number of correspondence in such as Figure 11 c, are compiled as one group in first time slot in OFDM symbol Correspondence subcarrier number is the DM-RS of k1 and k2 as 1 group in the OFDM symbol of number l=1, and 2 DM-RS symbols in every group make With the orthogonal spreading sequence in table 2, or, for Figure 11 b and Figure 11 c, two OFDM comprising DM-RS will be accorded with a subframe The DM-RS of same sub-carrier numbering is corresponded on number as one group, such as in Figure 11 c, the OFDM of numbering l=1 in first time slot DM-RS of the subcarrier number for k1 is corresponded to as 1 group on symbol and in second time slot in the OFDM symbol of numbering l=4, often The orthogonal spreading sequence in 2 DM-RS symbol use tables 2 in group.
The program can simultaneously avoid the synchronizing signal in FDD and TDD system Chong Die with DM-RS resources.
Embodiment seven：Correspondence aforesaid way three；
For TDD special subframes, the DM-RS resource mapping methods shown in Figure 12 a~Figure 12 d can be used；Or, it is also possible to Same frequency position in as illustrated, (conventional CP can also be at first for the 1st OFDM symbol in first time slot In 4th OFDM symbol of gap), last or penultimate OFDM symbol in first time slot place DM-RS mappings Resource.
Time domain orthogonal spread spectrum is similar with the conventional descending sub frame in above-described embodiment six.
The program can simultaneously avoid the synchronizing signal in FDD and TDD system Chong Die with DM-RS resources.
Particularly, the TDD special subframes under special subframe configuration 9, are matched somebody with somebody using the TDD special subframes defined in the above method 8 corresponding DM-RS resource mapping methods are put, and only there is DM- in the corresponding OFDM symbol set of DwPTS of the special subframe RS is transmitted.
Above-mentioned DM-RS resource mapping methods can be combined with DM-RS cost reduction schemes and use, you can by treaty rule Or high-rise configuration information, DM-RS resource mapping method or above-mentioned DM-RS resource impact side of the selection using cost reduction The DM-RS resource mapping methods of formula, wherein cost reduction are alternatively according to regular or high-rise configuration information of making an appointment to this DM-RS resource mapping methods in patent carry out time domain and/or frequency domain truncates what is obtained.
Referring to Figure 13, the embodiment of the present invention provides a kind of terminal, and the terminal includes：
Resource mapping unit 70, for determining mapping moneys of the DM-RS in present sub-frame according to DM-RS resource mapping methods Source, the DM-RS mappings resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame Resource Unit RE, N in OFDM symbol are the integer not less than 1；
Signal acquiring unit 71, for mapping resource according to the DM-RS for determining, transmits in acquisition present sub-frame DM-RS。
Further, the resource mapping unit 70 is used for：One of as follows according to DM-RS resource mapping methods Determine mapping resources of the DM-RS in present sub-frame：
Method one：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, By the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version Part RE in the DM-RS antenna port defined in 10 in the corresponding RE set of DM-RS, moves to the top n of the subframe In at least one of OFDM symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS current Mapping resource in subframe on the antenna port；Or,
Method two：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, Increase at least one of top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Plus the RE that transmission DM-RS is used, by DM- in the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of RS, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE and LTE The corresponding RE of DM-RS are by after the translation in time domain and/or frequency domain in the DM-RS antenna port defined in system version 10 The corresponding RE of DM-RS, as mapping resources of the DM-RS on the antenna port in present sub-frame；Or,
Method three：According to the configuration information by being carried in high-level signaling or physical downlink control channel PDCCH, DM- is determined RS resource mapping methods, and according to where the DM-RS resource mapping methods of the determination determine that DM-RS is transmitted in present sub-frame Antenna port on mapping resource, wherein the configuration information indicates a kind of DM-RS resource mapping methods, or indicate a son In the top n OFDM symbol of frame resource is mapped with the presence or absence of DM-RS；Or,
Method four：According to pre-defined DM-RS resource mapping methods, where determining that DM-RS is transmitted in present sub-frame Antenna port on mapping resource, the pre-defined DM-RS resource mapping methods are at least met in a preceding N for subframe There is DM-RS mapping resources at least one OFDM symbol in individual OFDM symbol.
Further, the resource mapping unit 70 is used for：One of as follows according to by high-level signaling or PDCCH The configuration information of middle carrying, determines DM-RS resource mapping methods, and determine according to the DM-RS resource mapping methods of the determination Mapping resources of the DM-RS in present sub-frame：
According to the configuration information, determine to map resource with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame, When it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, lead to The translation crossed on time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version 10 Defined in the DM-RS antenna port on part RE in DM-RS corresponding RE set, move to the top n OFDM of the subframe In at least one of symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS in present sub-frame In mapping resource on the antenna port；Or,
According to the configuration information, determine to map resource with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame, When it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, Increase at least one of the top n OFDM symbol on antenna port in present sub-frame where DM-RS transmission OFDM symbol The RE that transmission DM-RS is used, by DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10 Corresponding RE, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE and LTE systems The corresponding RE of DM-RS are by after the translation in time domain and/or frequency domain in the DM-RS antenna port defined in system version 10 The corresponding RE of DM-RS, as mapping resources of the DM-RS on the antenna port in present sub-frame；Or,
The configuration information institute is selected from pre-defined various DM-RS resource mapping methods according to the configuration information A kind of pre-defined DM-RS resource mapping methods for indicating, and according to the pre-defined DM-RS resource mapping methods, Determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame；Or,
According to the configuration information, determine to map resource with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame, When it is determined that in the presence of, selected from pre-defined various DM-RS resource mapping methods in a top n OFDM symbol for subframe It is middle to there is a kind of pre-defined DM-RS resource mapping methods that DM-RS maps resource, and according to the pre-defined DM- RS resource mapping methods, determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame.
Further, when the resource mapping unit 70 is according to the pre-defined DM-RS resource mapping methods, it is determined that During mapping resources of the DM-RS in present sub-frame, the pre-defined DM-RS resource mapping methods are one of as follows Definition：
Mode one：By the translation in time domain and/or frequency domain, will be every defined in LTE system version 10 in a subframe Part RE in individual DM-RS antenna port in DM-RS corresponding RE set, before moving in a subframe on the antenna port In at least one of N number of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；Or,
Mode two, based on the corresponding DM-RS resource impacts of each DM-RS antenna port defined in LTE system version 10 Increase DM-RS pairs at least one of mode, the top n OFDM symbol on the antenna port in subframe OFDM symbol The RE for answering, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10, as The DM-RS resource mapping methods that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained, or, will be increased The corresponding RE of DM-RS are by time domain and/or frequency domain in the DM-RS antenna port defined in RE and LTE system version 10 Translation after the corresponding RE of DM-RS, as the DM- that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained RS resource mapping methods；Or,
Mode three, meets in each DM-RS antenna port in a subframe, there is the OFDM that DM-RS maps resource Symbol is non-conterminous, and at least 1 group of presence in the OFDM symbol is made up of the RE that at least 2 adjacent sub-carriers of correspondence are numbered DM-RS maps resource.
Further, the signal acquiring unit 71 is used for：Methods described is being used for the moment, as follows according to really Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame：
For conventional cyclic prefix CP, on each antenna port where DM-RS transmission in present sub-frame, will transmit 4 RE of same subcarrier number or adjacent sub-carrier numbering are corresponded in the RE that DM-RS is used as one group, to every group of RE The DM-RS of upper transmission uses the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 Frequency expansion sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Further, the signal acquiring unit 71 is used for：Methods described is being used for the moment, as follows according to really Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE conducts that the transmission DM-RS of same subcarrier number is used are corresponded to One group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM- of the same subcarrier number of correspondence Used as one group, the DM-RS to being transmitted on every group of RE uses the DM-RS that LTE system version 10 is defined to 2 RE that RS is used The corresponding length of antenna port is that 2 time domain orthogonal frequency expansion sequence is despread, to obtain the DM- transmitted on the antenna port RS；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE that the transmission DM-RS that correspondence adjacent sub-carrier is numbered is used are used as one Group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM-RS institutes of correspondence adjacent sub-carrier numbering Used as one group, the DM-RS to being transmitted on every group of RE uses the DM-RS antennas that LTE system version 10 is defined to 2 RE for using The corresponding length in port is that 2 time domain orthogonal frequency expansion sequence is despread, to obtain the DM-RS transmitted on the antenna port； Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the same height of correspondence is carried Used as one group, the DM-RS to being transmitted on every group of RE uses LTE system version 10 to 2 RE that the transmission DM-RS of ripple numbering is used The corresponding length of the DM-RS antenna port of definition is that 2 time domain orthogonal frequency expansion sequence is despread, to obtain the antenna The DM-RS transmitted on port；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be mapped comprising DM-RS Transmission DM-RS on each OFDM of resource is used and most adjacent two RE on frequency domain as one group, to every group On RE transmit DM-RS using the time domain that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 just Frequency expansion sequence is handed over to be despread, to obtain the DM-RS transmitted on the antenna port.
Further, the signal acquiring unit 71 is used for：When using methods described two, as follows according to really Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission is included by first four In the OFDM symbol of the RE that DM-RS is used, the transmission DM-RS institutes of the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, afterwards in four OFDM symbols of the RE used comprising transmission DM-RS, the same height of correspondence is carried 4 RE for using 4 RE that the transmission DM-RS that ripple is numbered or adjacent sub-carrier is numbered is used are used as one group；
The DM-RS antenna port correspondence defined using LTE system version 10 to the DM-RS transmitted on one of which RE Length be that 4 time domain orthogonal frequency expansion sequence is despread, the DM-RS to being transmitted on another group of RE is used to LTE system version Corresponding length of the DM-RS antenna port of this 10 definition be 4 time domain orthogonal frequency expansion sequence enter after line translation obtain when Domain orthogonal spreading sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Further, if increasing transmission DM-RS institutes in two OFDM symbols in the top n OFDM symbol of present sub-frame The RE for using, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：It is 4 by the length that LTE system version 10 is defined The time domain orthogonal spread spectrum obtained after the first two spreading factor of time domain orthogonal frequency expansion sequence and latter two spreading factor exchange position Sequence；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, The time domain orthogonal frequency expansion sequence for then being obtained after the conversion is：The time domain orthogonal that the length that LTE system version 10 is defined is 4 is expanded Last spreading factor in frequency sequence is moving the time domain for obtaining just as first spreading factor after other spreading factors order Frequency expansion sequence is handed over, or, by first spread spectrum in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 4 Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining the factor.
Further, the signal acquiring unit 71 is used for：When using methods described two, as follows according to really Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame：
For extension CP, if increasing transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, will be used comprising transmission DM-RS RE multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier are compiled Number 2 RE being used of transmission DM-RS as one group, the DM-RS to being transmitted on every group of RE is defined using LTE system version 10 The corresponding length of the DM-RS antenna port be that 2 time domain orthogonal frequency expansion sequence is despread, to obtain the antenna port The DM-RS of upper transmission；Or,
For extension CP, if increasing transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, defined in LTE system version 10 The DM-RS antenna port on transmit the DM-RS transmitted on the RE that are used of DM-RS, defined according to LTE system version 10 Mode is despread, to obtain the DM-RS transmitted on the antenna port；And,
To increase in the OFDM symbol of RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS institutes on frequency domain Used as one group, the DM-RS transmitted on every group of RE uses the DM-RS antenna ends that LTE system version 10 is defined to 2 RE for using The corresponding length of mouth is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM symbol of the RE for having transmission DM-RS to be used will be increased In the OFDM symbol of the RE used comprising transmission DM-RS with first defined in LTE system version 10, the same height of correspondence Used as one group, the DM-RS transmitted on every group of RE is used to LTE system version 2 RE of carrier index or adjacent sub-carrier numbering The corresponding length of the DM-RS antenna port of 10 definition are that 2 time domain orthogonal frequency expansion sequence enters the time domain obtained after line translation Orthogonal spreading sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Further, the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：
Two spreading factors in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 2 are exchanged into position Postpone the time domain orthogonal frequency expansion sequence that the length for obtaining is 2.
Further, the signal acquiring unit 71 is used for：When using methods described three, as follows according to really Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In multiple OFDM symbols of the RE for being used, two adjacent the 4 of subcarrier number RE are corresponded to as one group, on every group of RE The DM-RS of transmission is expanded using the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 Frequency sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Further, the signal acquiring unit 71 is used for：When using methods described three, as follows according to really Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In each OFDM symbol for the RE for being used, two adjacent the 2 of subcarrier number RE are corresponded to as one group, on every group of RE The DM-RS of transmission is expanded using the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 Frequency sequence is despread, to obtain the DM-RS transmitted on the antenna port.
Further, present sub-frame is the special son of conventional descending sub frame or correspondence any one TDD special subframe configuration Frame.
Further, when present sub-frame is conventional descending sub frame, N is the positive integer no more than 4；And/or, in current son When frame is special subframe, N is positive integer no more than 2 or no more than 3 positive integers.
Referring to Figure 14, the embodiment of the present invention provides a kind of base station, and the base station includes：
Resource mapping unit 80, for determining mapping moneys of the DM-RS in present sub-frame according to DM-RS resource mapping methods Source, the DM-RS mappings resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame Resource Unit RE, N in OFDM symbol are the integer not less than 1；
Data transmission unit 81, for mapping resource according to the DM-RS for determining, present sub-frame is mapped to by DM-RS In be transmitted.
Further, the resource mapping unit 80 is used for：One of as follows according to DM-RS resource mapping methods Determine mapping resources of the DM-RS in present sub-frame：
Method one：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, By the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version Part RE in the DM-RS antenna port defined in 10 in the corresponding RE set of DM-RS, moves to the top n of the subframe In at least one of OFDM symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS current Mapping resource in subframe on the antenna port；Or,
Method two：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, Increase at least one of top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Plus the RE that transmission DM-RS is used, by DM- in the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of RS, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE and LTE The corresponding RE of DM-RS are by after the translation in time domain and/or frequency domain in the DM-RS antenna port defined in system version 10 The corresponding RE of DM-RS, as mapping resources of the DM-RS on the antenna port in present sub-frame；Or,
Method three：A kind of DM-RS resource mapping methods are determined according to actual needs, according to the DM-RS resource mapping methods, Determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame, and by high-level signaling or physical down To terminal send configuration information, the configuration information indicates a kind of DM-RS resource mapping methods to control channel PDCCH, or indicates In one top n OFDM symbol of subframe resource is mapped with the presence or absence of DM-RS；Or,
Method four：According to pre-defined DM-RS resource mapping methods, where determining that DM-RS is transmitted in present sub-frame Antenna port on mapping resource, the pre-defined DM-RS resource mapping methods are at least met in a preceding N for subframe There is DM-RS mapping resources at least one OFDM symbol in individual OFDM symbol.
Further, the resource mapping unit 80 is used for：Determine according to actual needs one of as follows a kind of DM-RS resource mapping methods, according to the DM-RS resource mapping methods, determine DM-RS in the antenna where transmission in present sub-frame Mapping resource on port, and by high-level signaling or PDCCH to terminal send configuration information：
According to actual needs, determine to map resource with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame, when true In the presence of fixed, based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, by when Translation on domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, will be fixed in LTE system version 10 Part RE in the DM-RS antenna port of justice in the corresponding RE set of DM-RS, moves to the top n OFDM symbol of the subframe At least one of in OFDM symbol, by the RE after the movement and remaining RE not moved, should in present sub-frame as DM-RS Mapping resource on antenna port, and sent for indicating a top n for subframe to terminal by high-level signaling or PDCCH The configuration information of resource is mapped in OFDM symbol with the presence or absence of DM-RS；Or,
According to actual needs, determine to map resource with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame, when true In the presence of fixed, based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, current Increase transmission at least one of the top n OFDM symbol on antenna port in subframe where DM-RS transmission OFDM symbol The RE that DM-RS is used, by DM-RS correspondences in the DM-RS antenna port defined in increased RE and LTE system version 10 RE, as mapping resources of the DM-RS on the antenna port in present sub-frame, or, by increased RE and LTE system version The corresponding RE of DM-RS are by the DM-RS after the translation in time domain and/or frequency domain in the DM-RS antenna port defined in sheet 10 Corresponding RE, as mapping resources of the DM-RS on the antenna port in present sub-frame, and by high-level signaling or PDCCH to Terminal is sent for indicating to whether there is the configuration information that DM-RS maps resource in a top n OFDM symbol for subframe；Or Person,
According to actual needs a kind of pre-defined DM- is selected from pre-defined various DM-RS resource mapping methods RS resource mapping methods, according to the pre-defined DM-RS resource mapping methods, determine that DM-RS is transmitted in present sub-frame Mapping resource on the antenna port at place, and sent for indicating the selection to terminal by high-level signaling or PDCCH A kind of configuration information of pre-defined DM-RS resource mapping methods, or sent to terminal by high-level signaling or PDCCH and be used for Indicate to whether there is the configuration information that DM-RS maps resource in a top n OFDM symbol for subframe.
Further, when the resource mapping unit 80 is according to the pre-defined DM-RS resource mapping methods, it is determined that During mapping resources of the DM-RS in present sub-frame, the pre-defined DM-RS resource mapping methods are one of as follows Definition：
Mode one：By the translation in time domain and/or frequency domain, will be every defined in LTE system version 10 in a subframe Part RE in individual DM-RS antenna port in DM-RS corresponding RE set, before moving in a subframe on the antenna port In at least one of N number of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；Or,
Mode two：Based on the corresponding DM-RS resource impacts of each DM-RS antenna port defined in LTE system version 10 Increase DM-RS pairs at least one of mode, the top n OFDM symbol on the antenna port in subframe OFDM symbol The RE for answering, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10, as The DM-RS resource mapping methods that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained, or, will be increased The corresponding RE of DM-RS are by time domain and/or frequency domain in the DM-RS antenna port defined in RE and LTE system version 10 Translation after the corresponding RE of DM-RS, as the DM- that mapping resources of the DM-RS on the antenna port in present sub-frame is obtained RS resource mapping methods；Or,
Mode three：Meet in each DM-RS antenna port in a subframe, there is the OFDM that DM-RS maps resource Symbol is non-conterminous, and at least 1 group of presence in the OFDM symbol is made up of the RE that at least 2 adjacent sub-carriers of correspondence are numbered DM-RS maps resource.
Further, the data transmission unit 81 is used for：Methods described is being used for the moment, as follows according to really Fixed DM-RS mapping resources, DM-RS are mapped in present sub-frame and are transmitted：
For conventional cyclic prefix CP, on each antenna port where DM-RS transmission in present sub-frame, will transmit 4 RE of same subcarrier number or adjacent sub-carrier numbering are corresponded in the RE that DM-RS is used as one group, to every group of RE The DM-RS of upper transmission uses the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 Frequency expansion sequence is spread, to transmit the DM-RS on the antenna port.
Further, the data transmission unit 81 is used for：Methods described is being used for the moment, as follows according to really Fixed DM-RS mapping resources, DM-RS are mapped in present sub-frame and are transmitted：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE conducts that the transmission DM-RS of same subcarrier number is used are corresponded to One group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM- of the same subcarrier number of correspondence Used as one group, the DM-RS to being transmitted on every group of RE uses the DM-RS that LTE system version 10 is defined to 2 RE that RS is used The corresponding length of antenna port is that 2 time domain orthogonal frequency expansion sequence is spread, to transmit the DM- on the antenna port RS；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the first two is included into transmission In the OFDM symbol of the RE that DM-RS is used, 2 RE that the transmission DM-RS that correspondence adjacent sub-carrier is numbered is used are used as one Group, in the OFDM symbol of latter two RE used comprising transmission DM-RS, the transmission DM-RS institutes of correspondence adjacent sub-carrier numbering Used as one group, the DM-RS to being transmitted on every group of RE uses the DM-RS antennas that LTE system version 10 is defined to 2 RE for using The corresponding length in port is that 2 time domain orthogonal frequency expansion sequence is spread, to transmit the DM-RS on the antenna port；Or Person,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, the same height of correspondence is carried Used as one group, the DM-RS to being transmitted on every group of RE uses LTE system version 10 to 2 RE that the transmission DM-RS of ripple numbering is used The corresponding length of the DM-RS antenna port of definition is that 2 time domain orthogonal frequency expansion sequence is spread, with the antenna port The upper transmission DM-RS；Or,
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be mapped comprising DM-RS Transmission DM-RS on each OFDM of resource is used and most adjacent two RE on frequency domain as one group, to every group On RE transmit DM-RS using the time domain that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 just Frequency expansion sequence is handed over to be spread, to transmit the DM-RS on the antenna port.
Further, the data transmission unit 81 is used for：When using methods described two, as follows according to really Fixed DM-RS mapping resources, DM-RS are mapped in present sub-frame and are transmitted：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission is included by first four In the OFDM symbol of the RE that DM-RS is used, the transmission DM-RS institutes of the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, afterwards in four OFDM symbols of the RE used comprising transmission DM-RS, the same height of correspondence is carried 4 RE for using 4 RE that the transmission DM-RS that ripple is numbered or adjacent sub-carrier is numbered is used are used as one group；
The DM-RS antenna port correspondence defined using LTE system version 10 to the DM-RS transmitted on one of which RE Length be that 4 time domain orthogonal frequency expansion sequence is spread, the DM-RS to being transmitted on another group of RE is used to LTE system version The corresponding length of the DM-RS antenna port of 10 definition are that 4 time domain orthogonal frequency expansion sequence enters the time domain obtained after line translation Orthogonal spreading sequence is spread, to transmit the DM-RS on the antenna port.
Further, if increasing transmission DM-RS institutes in two OFDM symbols in the top n OFDM symbol of present sub-frame The RE for using, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：It is 4 by the length that LTE system version 10 is defined The time domain orthogonal spread spectrum obtained after the first two spreading factor of time domain orthogonal frequency expansion sequence and latter two spreading factor exchange position Sequence；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, The time domain orthogonal frequency expansion sequence for then being obtained after the conversion is：The time domain orthogonal that the length that LTE system version 10 is defined is 4 is expanded Last spreading factor in frequency sequence is moving the time domain for obtaining just as first spreading factor after other spreading factors order Frequency expansion sequence is handed over, or, by first spread spectrum in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 4 Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining the factor.
Further, the data transmission unit 81 is used for：When using methods described two, as follows according to really Fixed DM-RS mapping resources, DM-RS are mapped in present sub-frame and are transmitted：
For extension CP, if increasing transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, will be used comprising transmission DM-RS RE multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier are compiled Number 2 RE being used of transmission DM-RS as one group, the DM-RS to being transmitted on every group of RE is defined using LTE system version 10 The corresponding length of the DM-RS antenna port be that 2 time domain orthogonal frequency expansion sequence is spread, uploaded with the antenna port The defeated DM-RS；Or,
For extension CP, if increasing transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE for being used, then on each antenna port where DM-RS transmission in present sub-frame, defined in LTE system version 10 The DM-RS antenna port on transmit the DM-RS transmitted on the RE that are used of DM-RS, defined according to LTE system version 10 Mode is spread, to transmit the DM-RS on the antenna port；And,
To increase in the OFDM symbol of RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS institutes on frequency domain Used as one group, the DM-RS transmitted on every group of RE uses the DM-RS antenna ends that LTE system version 10 is defined to 2 RE for using The corresponding length of mouth is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM symbol of the RE for having transmission DM-RS to be used will be increased In the OFDM symbol of the RE used comprising transmission DM-RS with first defined in LTE system version 10, the same height of correspondence Used as one group, the DM-RS transmitted on every group of RE is used to LTE system version 2 RE of carrier index or adjacent sub-carrier numbering The corresponding length of the DM-RS antenna port of 10 definition are that 2 time domain orthogonal frequency expansion sequence enters the time domain obtained after line translation Orthogonal spreading sequence is spread, to transmit the DM-RS on the antenna port.
Further, the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：
Two spreading factors in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 2 are exchanged into position Postpone the time domain orthogonal frequency expansion sequence that the length for obtaining is 2.
Further, the data transmission unit 81 is used for：When using methods described three, as follows according to really Fixed DM-RS mapping resources, DM-RS are mapped in present sub-frame and are transmitted：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In multiple OFDM symbols of the RE for being used, two adjacent the 4 of subcarrier number RE are corresponded to as one group, on every group of RE The DM-RS of transmission is expanded using the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 Frequency sequence is spread, to transmit the DM-RS on the antenna port.
Further, the data transmission unit 81 is used for：When using methods described three, as follows according to really Fixed DM-RS mapping resources, DM-RS are mapped in present sub-frame and are transmitted：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be comprising transmission DM-RS In each OFDM symbol for the RE for being used, two adjacent the 2 of subcarrier number RE are corresponded to as one group, on every group of RE The DM-RS of transmission is expanded using the time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 Frequency sequence is spread, to transmit the DM-RS on the antenna port.
Further, present sub-frame is the special son of conventional descending sub frame or correspondence any one TDD special subframe configuration Frame.
Further, when present sub-frame is conventional descending sub frame, N is the positive integer no more than 4；And/or, in current son When frame is special subframe, N is the positive integer no more than 2 or the positive integer no more than 3.
To sum up, beneficial effects of the present invention include：
In scheme provided in an embodiment of the present invention, have DM-RS's in the control area of subframe is top n OFDM symbol Mapping resource so that the channel-estimation information in top n OFDM symbol can be by the DM-RS of transmission in N number of OFDM symbol Carry out interpolation calculation to obtain, it is to avoid carry out extrapolation algorithm by the DM-RS of distance N number of symbol limited row farther out in time domain Obtain, so as to improve the data demodulation performance on NCT carrier waves.
Further, in scheme provided in an embodiment of the present invention, can apply in special subframe, for LTE Rel-10 In do not support that the TDD special subframes that DM-RS is transmitted are configured, such as during descending conventional CP, TDD special subframes are descending with setting to 0 with 5 During extension CP, with setting to 0 and 4, the method that can be supplied to according to the present invention obtains any TDD special subframes and configures TDD special subframes Corresponding DM-RS resource mapping methods, so as to can also transmit DM- on the special subframe for not supporting DM-RS transmission in Rel-10 RS, and then the downlink data transmission based on DM-RS can be carried out in special subframe, so as to improve the resource profit of NCT carrier waves With rate.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product Figure and/or block diagram are described.It should be understood that every first-class during flow chart and/or block diagram can be realized by computer program instructions The combination of flow and/or square frame in journey and/or square frame and flow chart and/or block diagram.These computer programs can be provided The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices The device of the function of being specified in present one flow of flow chart or multiple one square frame of flow and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or other programmable data processing devices with spy In determining the computer-readable memory that mode works so that instruction of the storage in the computer-readable memory is produced and include finger Make the manufacture of device, the command device realize in one flow of flow chart or multiple one square frame of flow and/or block diagram or The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented treatment, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising these changes and modification.

Claims (36)

1. a kind of downlink user dedicated demodulation reference signal DM-RS transmission methods, it is characterised in that the method includes：
Terminal determines mapping resources of the DM-RS in present sub-frame, the DM-RS mappings money according to DM-RS resource mapping methods Resource Unit at least at least one of top n orthogonal frequency division multiplex OFDM symbol including the present sub-frame OFDM symbol of source RE, N are the integer not less than 1；
Terminal maps resource according to the DM-RS for determining, obtains the DM-RS transmitted in present sub-frame；
The terminal determines mapping resources of the DM-RS in present sub-frame according to DM-RS resource mapping methods, specifically includes as follows One of method：
Method one：Terminal be based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, By the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version Part RE in the DM-RS antenna port defined in 10 in the corresponding RE set of DM-RS, moves to the top n of the subframe In at least one of OFDM symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS current Mapping resource in subframe on the antenna port；Or,
Method two：Terminal be based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, Increase at least one of top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Plus the RE that transmission DM-RS is used, by DM- in the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of RS, should in present sub-frame as DM-RS by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain Mapping resource on antenna port；Or,
Method three：Terminal determines DM- according to the configuration information by being carried in high-level signaling or physical downlink control channel PDCCH RS resource mapping methods, and according to where the DM-RS resource mapping methods of the determination determine that DM-RS is transmitted in present sub-frame Antenna port on mapping resource, wherein the configuration information indicates a kind of DM-RS resource mapping methods, or indicate a son Resource is mapped with the presence or absence of DM-RS in the top n OFDM symbol of frame, is specifically included：
Mode one：Terminal is reflected in the top n OFDM symbol for determining present sub-frame according to the configuration information with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource impacts Mode, by the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE systems Part RE in the DM-RS antenna port defined in system version 10 in the corresponding RE set of DM-RS, before moving to the subframe In at least one of N number of OFDM symbol OFDM symbol, the RE after the movement and remaining RE not moved exists as DM-RS Mapping resource in present sub-frame on the antenna port；Or,
Mode two：Terminal is reflected in the top n OFDM symbol for determining present sub-frame according to the configuration information with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource impacts At least one of mode, the top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol It is upper to increase the RE that transmission DM-RS is used, by the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of upper DM-RS by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain, as DM-RS in present sub-frame In mapping resource on the antenna port；Or,
Mode three：Terminal is matched somebody with somebody from pre-defined various DM-RS resource mapping methods according to the configuration information described in selection The indicated a kind of pre-defined DM-RS resource mapping methods of confidence breath, and reflected according to the pre-defined DM-RS resources Mode is penetrated, mapping resources of the DM-RS on the antenna port where transmission in present sub-frame is determined；Or,
Mode four：Terminal is reflected in the top n OFDM symbol for determining present sub-frame according to the configuration information with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, selected in a top n for subframe from pre-defined various DM-RS resource mapping methods There is a kind of pre-defined DM-RS resource mapping methods that DM-RS maps resource in OFDM symbol, and according to described fixed in advance The DM-RS resource mapping methods of justice, determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame；Or Person,
Method four：Terminal determines DM-RS where transmission in present sub-frame according to pre-defined DM-RS resource mapping methods Antenna port on mapping resource, the pre-defined DM-RS resource mapping methods are at least met in a preceding N for subframe There is DM-RS mapping resources at least one OFDM symbol in individual OFDM symbol；
Wherein, when using the mode three or mode four or method four, the pre-defined DM-RS resource mapping methods are pressed According to the definition of one of following method：
Method A：By the translation in time domain and/or frequency domain, by each DM- defined in LTE system version 10 in a subframe Part RE on RS antenna ports in DM-RS corresponding RE set, moves to the top n on the antenna port in a subframe In at least one of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；Or,
Method B：Based on the corresponding DM-RS resource mapping methods of each DM-RS antenna port defined in LTE system version 10, Increase DM-RS at least one of top n OFDM symbol on the antenna port in subframe OFDM symbol corresponding RE, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10 by time domain And/or the corresponding RE of DM-RS after the translation on frequency domain, the mapping money as DM-RS on the antenna port in present sub-frame The DM-RS resource mapping methods that source obtains；
When using methods described one or the mode one or methods described A, terminal maps money according to the DM-RS for determining Source, obtains the DM-RS transmitted in present sub-frame, specifically includes：
For conventional cyclic prefix CP, on each antenna port where DM-RS transmission in present sub-frame, DM-RS will be transmitted Used as one group, the DM-RS to being transmitted on every group of RE uses LTE systems to 4 RE of correspondence adjacent sub-carrier numbering in the RE for being used The corresponding length of the DM-RS antenna port of the system definition of version 10 is that 4 time domain orthogonal frequency expansion sequence is despread, to obtain Take the DM-RS transmitted on the antenna port.
2. the method for claim 1, it is characterised in that when using methods described two or the mode two or method B, Terminal maps resource according to the DM-RS for determining, obtains the DM-RS transmitted in present sub-frame, specifically includes：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission DM- is included by first four In the OFDM symbol of the RE that RS is used, the transmission DM-RS of the same subcarrier number of correspondence or adjacent sub-carrier numbering is made Used as one group, four include in the OFDM symbols for transmitting the RE that DM-RS is used 4 RE afterwards, the same subcarrier of correspondence 4 RE that the transmission DM-RS of numbering or adjacent sub-carrier numbering is used are used as one group；
The corresponding length of the DM-RS antenna port defined using LTE system version 10 to the DM-RS transmitted on one of which RE The time domain orthogonal frequency expansion sequence spent for 4 is despread, and the DM-RS to being transmitted on another group of RE is used to LTE system version 10 The corresponding length of the DM-RS antenna port of definition is that 4 time domain orthogonal frequency expansion sequence is entering the time domain obtained after line translation just Frequency expansion sequence is handed over to be despread, to obtain the DM-RS transmitted on the antenna port.
3. method as claimed in claim 2, it is characterised in that if two in the top n OFDM symbol of present sub-frame Increase the RE that transmission DM-RS is used in OFDM symbol, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：By LTE The length of the definition of system version 10 is that the first two spreading factor and latter two spreading factor of 4 time domain orthogonal frequency expansion sequence are exchanged The time domain orthogonal frequency expansion sequence obtained behind position；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, institute Stating the time domain orthogonal frequency expansion sequence obtained after conversion is：The time domain orthogonal that the length that LTE system version 10 is defined is 4 is spread into sequence Last spreading factor in row moves the time domain orthogonal for obtaining and expands as first spreading factor after other spreading factors order Frequency sequence, or, by first spreading factor in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 4 Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining.
4. the method for claim 1, it is characterised in that when using methods described two or the mode two or method B, Terminal maps resource according to the DM-RS for determining, obtains the DM-RS transmitted in present sub-frame, specifically includes：
For extension CP, if increase transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, the RE that will be used comprising transmission DM-RS Multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, the DM-RS to being transmitted on every group of RE uses the institute that LTE system version 10 is defined to 2 RE that transmission DM-RS is used State the time domain orthogonal frequency expansion sequence that the corresponding length of DM-RS antenna port is 2 to be despread, to obtain antenna port upload Defeated DM-RS；Or,
For extension CP, if increase transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, to the institute defined in LTE system version 10 The DM-RS for being transmitted in DM-RS antenna port and being transmitted on the RE that DM-RS is used is stated, according to the mode that LTE system version 10 is defined Despread, to obtain the DM-RS transmitted on the antenna port；And,
To increase in the OFDM symbol of the RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS is used on frequency domain 2 RE as one group, on every group of RE transmit DM-RS using LTE system version 10 define the DM-RS antenna port pair The length answered is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM symbol and LTE of the RE for having transmission DM-RS to be used will be increased In first OFDM symbol of the RE used comprising transmission DM-RS defined in system version 10, the same subcarrier of correspondence Used as one group, the DM-RS transmitted on every group of RE uses fixed to LTE system version 10 2 RE of numbering or adjacent sub-carrier numbering The corresponding length of the DM-RS antenna port of justice is that 2 time domain orthogonal frequency expansion sequence enters the time domain orthogonal obtained after line translation Frequency expansion sequence is despread, to obtain the DM-RS transmitted on the antenna port.
5. method as claimed in claim 4, it is characterised in that the time domain orthogonal frequency expansion sequence obtained after the conversion is：
After two spreading factor exchange positions in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 2 The length for obtaining is 2 time domain orthogonal frequency expansion sequence.
6. the method for claim 1, it is characterised in that when using methods described three or mode three, terminal is according to true Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame, specifically include：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In multiple OFDM symbols of RE, two adjacent the 4 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 to spread sequence Row are despread, to obtain the DM-RS transmitted on the antenna port.
7. the method for claim 1, it is characterised in that when using methods described three or mode three, terminal is according to true Fixed DM-RS mapping resources, obtain the DM-RS transmitted in present sub-frame, specifically include：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In each OFDM symbol of RE, two adjacent the 2 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 to spread sequence Row are despread, to obtain the DM-RS transmitted on the antenna port.
8. the method as described in any in claim 1 to 7, it is characterised in that present sub-frame is conventional descending sub frame or correspondence The special subframe of any one TDD special subframe configuration.
9. method as claimed in claim 8, it is characterised in that when present sub-frame is conventional descending sub frame, N is no more than 4 Positive integer；And/or,
When present sub-frame is special subframe, N is the positive integer no more than 2 or the positive integer no more than 3.
10. a kind of downlink user dedicated demodulation reference signal DM-RS transmission methods, it is characterised in that the method includes：
Base station determines mapping resources of the DM-RS in present sub-frame, the DM-RS mappings money according to DM-RS resource mapping methods Resource Unit at least at least one of top n orthogonal frequency division multiplex OFDM symbol including the present sub-frame OFDM symbol of source RE, N are the integer not less than 1；
Base station maps resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame and is transmitted；
The base station determines mapping resources of the DM-RS in present sub-frame according to DM-RS resource mapping methods, specifically includes as follows One of method：
Method one：Base station be based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, By the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version Part RE in the DM-RS antenna port defined in 10 in the corresponding RE set of DM-RS, moves to the top n of the subframe In at least one of OFDM symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS current Mapping resource in subframe on the antenna port；Or,
Method two：Base station be based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, Increase at least one of top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Plus the RE that transmission DM-RS is used, by DM- in the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of RS, should in present sub-frame as DM-RS by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain Mapping resource on antenna port；Or,
Method three：Base station determines a kind of DM-RS resource mapping methods according to actual needs, according to the DM-RS resource mapping methods, Determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame, and by high-level signaling or physical down To terminal send configuration information, the configuration information indicates a kind of DM-RS resource mapping methods to control channel PDCCH, or indicates Resource is mapped with the presence or absence of DM-RS in one top n OFDM symbol of subframe, is specifically included：
Mode one：Base station according to actual needs, determines to map money with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame Source, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, By the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version Part RE in the DM-RS antenna port defined in 10 in the corresponding RE set of DM-RS, moves to the top n of the subframe In at least one of OFDM symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS current Mapping resource in subframe on the antenna port, and sent for indicating a subframe to terminal by high-level signaling or PDCCH Top n OFDM symbol in the presence or absence of DM-RS map resource configuration information；Or,
Mode two：Base station according to actual needs, determines to map money with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame Source, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, Increase at least one of top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Plus the RE that transmission DM-RS is used, by DM- in the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of RS, should in present sub-frame as DM-RS by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain Mapping resource on antenna port；Or,
Mode three：Base station selects a kind of fixed in advance from pre-defined various DM-RS resource mapping methods according to actual needs The DM-RS resource mapping methods of justice, according to the pre-defined DM-RS resource mapping methods, determine DM-RS in present sub-frame Mapping resource on antenna port where middle transmission, and send described for indicating to terminal by high-level signaling or PDCCH A kind of configuration information of the pre-defined DM-RS resource mapping methods of selection, or sent out to terminal by high-level signaling or PDCCH Send for indicating to whether there is the configuration information that DM-RS maps resource in a top n OFDM symbol for subframe；
Mode four：Base station according to actual needs, determines to map money with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame Source, when it is determined that in the presence of, selected from pre-defined various DM-RS resource mapping methods in a top n OFDM for subframe There is a kind of pre-defined DM-RS resource mapping methods that DM-RS maps resource in symbol, and according to described pre-defined DM-RS resource mapping methods, determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame；Or,
Method four：Base station determines DM-RS where transmission in present sub-frame according to pre-defined DM-RS resource mapping methods Antenna port on mapping resource, the pre-defined DM-RS resource mapping methods are at least met in a preceding N for subframe There is DM-RS mapping resources at least one OFDM symbol in individual OFDM symbol；
Wherein, when using the mode three or mode four or method four, the pre-defined DM-RS resource mapping methods are pressed According to the definition of one of following method：
Method A：By the translation in time domain and/or frequency domain, by each DM- defined in LTE system version 10 in a subframe Part RE on RS antenna ports in DM-RS corresponding RE set, moves to the top n on the antenna port in a subframe In at least one of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；Or,
Method B：Based on the corresponding DM-RS resource mapping methods of each DM-RS antenna port defined in LTE system version 10, Increase DM-RS at least one of top n OFDM symbol on the antenna port in subframe OFDM symbol corresponding RE, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10 by time domain And/or the corresponding RE of DM-RS after the translation on frequency domain, the mapping money as DM-RS on the antenna port in present sub-frame The DM-RS resource mapping methods that source obtains；
When using methods described one or the mode one or methods described A, terminal maps money according to the DM-RS for determining Source, obtains the DM-RS transmitted in present sub-frame, specifically includes：
For conventional cyclic prefix CP, on each antenna port where DM-RS transmission in present sub-frame, DM-RS will be transmitted Used as one group, the DM-RS to being transmitted on every group of RE uses LTE systems to 4 RE of correspondence adjacent sub-carrier numbering in the RE for being used The corresponding length of the DM-RS antenna port of the system definition of version 10 is that 4 time domain orthogonal frequency expansion sequence is spread, with this The DM-RS is transmitted on antenna port.
11. methods as claimed in claim 10, it is characterised in that using methods described two or the mode two or method B When, base station maps resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame and is transmitted, and specifically includes：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission DM- is included by first four In the OFDM symbol of the RE that RS is used, the transmission DM-RS of the same subcarrier number of correspondence or adjacent sub-carrier numbering is made Used as one group, four include in the OFDM symbols for transmitting the RE that DM-RS is used 4 RE afterwards, the same subcarrier of correspondence 4 RE that the transmission DM-RS of numbering or adjacent sub-carrier numbering is used are used as one group；
The corresponding length of the DM-RS antenna port defined using LTE system version 10 to the DM-RS transmitted on one of which RE The time domain orthogonal frequency expansion sequence spent for 4 is spread, and it is fixed to LTE system version 10 that the DM-RS to being transmitted on another group of RE is used The corresponding length of the DM-RS antenna port of justice is that 4 time domain orthogonal frequency expansion sequence enters the time domain orthogonal obtained after line translation Frequency expansion sequence is spread, to transmit the DM-RS on the antenna port.
12. methods as claimed in claim 11, it is characterised in that if two in the top n OFDM symbol of present sub-frame Increase the RE that transmission DM-RS is used in OFDM symbol, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：By LTE The length of the definition of system version 10 is that the first two spreading factor and latter two spreading factor of 4 time domain orthogonal frequency expansion sequence are exchanged The time domain orthogonal frequency expansion sequence obtained behind position；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, institute Stating the time domain orthogonal frequency expansion sequence obtained after conversion is：The time domain orthogonal that the length that LTE system version 10 is defined is 4 is spread into sequence Last spreading factor in row moves the time domain orthogonal for obtaining and expands as first spreading factor after other spreading factors order Frequency sequence, or, by first spreading factor in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 4 Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining.
13. methods as claimed in claim 10, it is characterised in that using methods described two or the mode two or method B When, base station maps resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame and is transmitted, and specifically includes：
For extension CP, if increase transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, the RE that will be used comprising transmission DM-RS Multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, the DM-RS to being transmitted on every group of RE uses the institute that LTE system version 10 is defined to 2 RE that transmission DM-RS is used State the time domain orthogonal frequency expansion sequence that the corresponding length of DM-RS antenna port is 2 to be spread, to transmit institute on the antenna port State DM-RS；Or,
For extension CP, if increase transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, to the institute defined in LTE system version 10 The DM-RS for being transmitted in DM-RS antenna port and being transmitted on the RE that DM-RS is used is stated, according to the mode that LTE system version 10 is defined Spread, to transmit the DM-RS on the antenna port；And,
To increase in the OFDM symbol of the RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS is used on frequency domain 2 RE as one group, on every group of RE transmit DM-RS using LTE system version 10 define the DM-RS antenna port pair The length answered is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM symbol and LTE of the RE for having transmission DM-RS to be used will be increased In first OFDM symbol of the RE used comprising transmission DM-RS defined in system version 10, the same subcarrier of correspondence Used as one group, the DM-RS transmitted on every group of RE uses fixed to LTE system version 10 2 RE of numbering or adjacent sub-carrier numbering The corresponding length of the DM-RS antenna port of justice is that 2 time domain orthogonal frequency expansion sequence enters the time domain orthogonal obtained after line translation Frequency expansion sequence is spread, to transmit the DM-RS on the antenna port.
14. methods as claimed in claim 13, it is characterised in that the time domain orthogonal frequency expansion sequence obtained after the conversion is：
After two spreading factor exchange positions in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 2 The length for obtaining is 2 time domain orthogonal frequency expansion sequence.
15. methods as claimed in claim 10, it is characterised in that using methods described three or mode three when, base station according to The DM-RS mapping resources for determining, DM-RS are mapped in present sub-frame and are transmitted, and are specifically included：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In multiple OFDM symbols of RE, two adjacent the 4 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 to spread sequence Row are spread, to transmit the DM-RS on the antenna port.
16. methods as claimed in claim 10, it is characterised in that using methods described three or mode three when, base station according to The DM-RS mapping resources for determining, DM-RS are mapped in present sub-frame and are transmitted, and are specifically included：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In each OFDM symbol of RE, two adjacent the 2 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 to spread sequence Row are spread, to transmit the DM-RS on the antenna port.
17. method as described in claim 10 to 16 is any, it is characterised in that present sub-frame is conventional descending sub frame or correspondence The special subframe of any one TDD special subframe configuration.
18. methods as claimed in claim 17, it is characterised in that when present sub-frame is conventional descending sub frame, N be no more than 4 positive integer；And/or,
When present sub-frame is special subframe, N is the positive integer no more than 2 or the positive integer no more than 3.
19. a kind of terminals, it is characterised in that the terminal includes：
Resource mapping unit, for determining mapping resources of the DM-RS in present sub-frame, institute according to DM-RS resource mapping methods State DM-RS mappings resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame OFDM symbols Resource Unit RE, N on number are the integer not less than 1；
Signal acquiring unit, for mapping resource according to the DM-RS for determining, obtains the DM-RS transmitted in present sub-frame；
The resource mapping unit is used for：Determine DM-RS current according to DM-RS resource mapping methods one of as follows Mapping resource in subframe：
Method one：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, pass through Translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version 10 Part RE in the DM-RS antenna port of definition in the corresponding RE set of DM-RS, moves to the top n OFDM symbols of the subframe Number at least one of in OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS in present sub-frame Mapping resource on the antenna port；Or,
Method two：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, working as Increase at least one of the top n OFDM symbol on antenna port in preceding subframe where DM-RS transmission OFDM symbol and pass The RE that defeated DM-RS is used, by DM-RS couples in the DM-RS antenna port defined in increased RE and LTE system version 10 The RE for answering by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain, as DM-RS in present sub-frame the antenna Mapping resource on port；Or,
Method three：According to the configuration information by being carried in high-level signaling or physical downlink control channel PDCCH, determine that DM-RS is provided Source mapping mode, and the day according to where the DM-RS resource mapping methods of the determination determine DM-RS in transmission in present sub-frame Mapping resource on line end mouthful, wherein a kind of DM-RS resource mapping methods of configuration information instruction, or one subframe of instruction Resource is mapped with the presence or absence of DM-RS in top n OFDM symbol, is specifically included：
Mode one：Terminal is reflected in the top n OFDM symbol for determining present sub-frame according to the configuration information with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource impacts Mode, by the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE systems Part RE in the DM-RS antenna port defined in system version 10 in the corresponding RE set of DM-RS, before moving to the subframe In at least one of N number of OFDM symbol OFDM symbol, the RE after the movement and remaining RE not moved exists as DM-RS Mapping resource in present sub-frame on the antenna port；Or,
Mode two：Terminal is reflected in the top n OFDM symbol for determining present sub-frame according to the configuration information with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource impacts At least one of mode, the top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol It is upper to increase the RE that transmission DM-RS is used, by the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of upper DM-RS by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain, as DM-RS in present sub-frame In mapping resource on the antenna port；Or,
Mode three：Terminal is matched somebody with somebody from pre-defined various DM-RS resource mapping methods according to the configuration information described in selection The indicated a kind of pre-defined DM-RS resource mapping methods of confidence breath, and reflected according to the pre-defined DM-RS resources Mode is penetrated, mapping resources of the DM-RS on the antenna port where transmission in present sub-frame is determined；Or,
Mode four：Terminal is reflected in the top n OFDM symbol for determining present sub-frame according to the configuration information with the presence or absence of DM-RS Penetrate resource, when it is determined that in the presence of, selected in a top n for subframe from pre-defined various DM-RS resource mapping methods There is a kind of pre-defined DM-RS resource mapping methods that DM-RS maps resource in OFDM symbol, and according to described fixed in advance The DM-RS resource mapping methods of justice, determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame；Or Person,
Method four：According to pre-defined DM-RS resource mapping methods, determine DM-RS in the day where transmission in present sub-frame Mapping resource on line end mouthful, the pre-defined DM-RS resource mapping methods are at least met in a top n for subframe There is DM-RS mapping resources at least one OFDM symbol in OFDM symbol；
Wherein, when using the mode three or mode four or method four, the pre-defined DM-RS resource mapping methods are pressed According to the definition of one of following method：
Method A：By the translation in time domain and/or frequency domain, by each DM- defined in LTE system version 10 in a subframe Part RE on RS antenna ports in DM-RS corresponding RE set, moves to the top n on the antenna port in a subframe In at least one of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；Or,
Method B：Based on the corresponding DM-RS resource mapping methods of each DM-RS antenna port defined in LTE system version 10, Increase DM-RS at least one of top n OFDM symbol on the antenna port in subframe OFDM symbol corresponding RE, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10 by time domain And/or the corresponding RE of DM-RS after the translation on frequency domain, the mapping money as DM-RS on the antenna port in present sub-frame The DM-RS resource mapping methods that source obtains；
When using methods described one or the mode one or methods described A, terminal maps money according to the DM-RS for determining Source, obtains the DM-RS transmitted in present sub-frame, specifically includes：
For conventional cyclic prefix CP, on each antenna port where DM-RS transmission in present sub-frame, DM-RS will be transmitted Used as one group, the DM-RS to being transmitted on every group of RE uses LTE systems to 4 RE of correspondence adjacent sub-carrier numbering in the RE for being used The corresponding length of the DM-RS antenna port of the system definition of version 10 is that 4 time domain orthogonal frequency expansion sequence is despread, to obtain Take the DM-RS transmitted on the antenna port.
20. terminals as claimed in claim 19, it is characterised in that the signal acquiring unit is used for：Using methods described When two or described modes two or method B, resource is mapped according to the DM-RS for determining as follows, obtain present sub-frame The DM-RS of middle transmission：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission DM- is included by first four In the OFDM symbol of the RE that RS is used, the transmission DM-RS of the same subcarrier number of correspondence or adjacent sub-carrier numbering is made Used as one group, four include in the OFDM symbols for transmitting the RE that DM-RS is used 4 RE afterwards, the same subcarrier of correspondence 4 RE that the transmission DM-RS of numbering or adjacent sub-carrier numbering is used are used as one group；
The corresponding length of the DM-RS antenna port defined using LTE system version 10 to the DM-RS transmitted on one of which RE The time domain orthogonal frequency expansion sequence spent for 4 is despread, and the DM-RS to being transmitted on another group of RE is used to LTE system version 10 The corresponding length of the DM-RS antenna port of definition is that 4 time domain orthogonal frequency expansion sequence is entering the time domain obtained after line translation just Frequency expansion sequence is handed over to be despread, to obtain the DM-RS transmitted on the antenna port.
21. terminals as claimed in claim 20, it is characterised in that if two in the top n OFDM symbol of present sub-frame Increase the RE that transmission DM-RS is used in OFDM symbol, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：By LTE The length of the definition of system version 10 is that the first two spreading factor and latter two spreading factor of 4 time domain orthogonal frequency expansion sequence are exchanged The time domain orthogonal frequency expansion sequence obtained behind position；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, institute Stating the time domain orthogonal frequency expansion sequence obtained after conversion is：The time domain orthogonal that the length that LTE system version 10 is defined is 4 is spread into sequence Last spreading factor in row moves the time domain orthogonal for obtaining and expands as first spreading factor after other spreading factors order Frequency sequence, or, by first spreading factor in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 4 Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining.
22. terminals as claimed in claim 19, it is characterised in that the signal acquiring unit is used for：Using methods described When two or described modes two or method B, resource is mapped according to the DM-RS for determining as follows, obtain present sub-frame The DM-RS of middle transmission：
For extension CP, if increase transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, the RE that will be used comprising transmission DM-RS Multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, the DM-RS to being transmitted on every group of RE uses the institute that LTE system version 10 is defined to 2 RE that transmission DM-RS is used State the time domain orthogonal frequency expansion sequence that the corresponding length of DM-RS antenna port is 2 to be despread, to obtain antenna port upload Defeated DM-RS；Or,
For extension CP, if increase transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, to the institute defined in LTE system version 10 The DM-RS for being transmitted in DM-RS antenna port and being transmitted on the RE that DM-RS is used is stated, according to the mode that LTE system version 10 is defined Despread, to obtain the DM-RS transmitted on the antenna port；And,
To increase in the OFDM symbol of the RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS is used on frequency domain 2 RE as one group, on every group of RE transmit DM-RS using LTE system version 10 define the DM-RS antenna port pair The length answered is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM symbol and LTE of the RE for having transmission DM-RS to be used will be increased In first OFDM symbol of the RE used comprising transmission DM-RS defined in system version 10, the same subcarrier of correspondence Used as one group, the DM-RS transmitted on every group of RE uses fixed to LTE system version 10 2 RE of numbering or adjacent sub-carrier numbering The corresponding length of the DM-RS antenna port of justice is that 2 time domain orthogonal frequency expansion sequence enters the time domain orthogonal obtained after line translation Frequency expansion sequence is despread, to obtain the DM-RS transmitted on the antenna port.
23. terminals as claimed in claim 22, it is characterised in that the time domain orthogonal frequency expansion sequence obtained after the conversion is：
After two spreading factor exchange positions in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 2 The length for obtaining is 2 time domain orthogonal frequency expansion sequence.
24. terminals as claimed in claim 19, it is characterised in that the signal acquiring unit is used for：Using methods described Three or during mode three, resource is mapped according to the DM-RS for determining as follows, obtain the DM- transmitted in present sub-frame RS：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In multiple OFDM symbols of RE, two adjacent the 4 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 to spread sequence Row are despread, to obtain the DM-RS transmitted on the antenna port.
25. terminals as claimed in claim 19, it is characterised in that the signal acquiring unit is used for：Using methods described Three or during mode three, resource is mapped according to the DM-RS for determining as follows, obtain the DM- transmitted in present sub-frame RS：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In each OFDM symbol of RE, two adjacent the 2 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 to spread sequence Row are despread, to obtain the DM-RS transmitted on the antenna port.
In 26. such as claim 19 to 25 it is any as described in terminal, it is characterised in that present sub-frame is conventional descending sub frame or right Answer the special subframe of any one TDD special subframe configuration.
27. terminals as claimed in claim 26, it is characterised in that when present sub-frame is conventional descending sub frame, N be no more than 4 positive integer；And/or,
When present sub-frame is special subframe, N is positive integer no more than 2 or no more than 3 positive integers.
28. a kind of base stations, it is characterised in that the base station includes：
Resource mapping unit, for determining mapping resources of the DM-RS in present sub-frame, institute according to DM-RS resource mapping methods State DM-RS mappings resource at least at least one of top n orthogonal frequency division multiplex OFDM symbol including present sub-frame OFDM symbols Resource Unit RE, N on number are the integer not less than 1；
Data transmission unit, for mapping resource according to the DM-RS for determining, DM-RS is mapped in present sub-frame to be carried out Transmission；
The resource mapping unit is used for：Determine DM-RS current according to DM-RS resource mapping methods one of as follows Mapping resource in subframe：
Method one：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, pass through Translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version 10 Part RE in the DM-RS antenna port of definition in the corresponding RE set of DM-RS, moves to the top n OFDM symbols of the subframe Number at least one of in OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS in present sub-frame Mapping resource on the antenna port；Or,
Method two：Based on the DM-RS resource mapping methods defined in the rule made an appointment and LTE system version 10, working as Increase at least one of the top n OFDM symbol on antenna port in preceding subframe where DM-RS transmission OFDM symbol and pass The RE that defeated DM-RS is used, by DM-RS couples in the DM-RS antenna port defined in increased RE and LTE system version 10 The RE for answering by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain, as DM-RS in present sub-frame the antenna Mapping resource on port；Or,
Method three：A kind of DM-RS resource mapping methods are determined according to actual needs, according to the DM-RS resource mapping methods, it is determined that Mapping resources of the DM-RS on the antenna port where transmission in present sub-frame, and controlled by high-level signaling or physical down To terminal send configuration information, the configuration information indicates a kind of DM-RS resource mapping methods to channel PDCCH, or indicates one Resource is mapped with the presence or absence of DM-RS in the top n OFDM symbol of subframe, is specifically included：
Mode one：Base station according to actual needs, determines to map money with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame Source, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, By the translation in time domain and/or frequency domain, on the antenna port where DM-RS transmission in present sub-frame, by LTE system version Part RE in the DM-RS antenna port defined in 10 in the corresponding RE set of DM-RS, moves to the top n of the subframe In at least one of OFDM symbol OFDM symbol, by the RE after the movement and remaining RE not moved, as DM-RS current Mapping resource in subframe on the antenna port, and sent for indicating a subframe to terminal by high-level signaling or PDCCH Top n OFDM symbol in the presence or absence of DM-RS map resource configuration information；Or,
Mode two：Base station according to actual needs, determines to map money with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame Source, when it is determined that in the presence of, based on make an appointment rule and LTE system version 10 defined in DM-RS resource mapping methods, Increase at least one of top n OFDM symbol on the antenna port where DM-RS transmission in present sub-frame OFDM symbol Plus the RE that transmission DM-RS is used, by DM- in the DM-RS antenna port defined in increased RE and LTE system version 10 The corresponding RE of RS, should in present sub-frame as DM-RS by the corresponding RE of the DM-RS after the translation in time domain and/or frequency domain Mapping resource on antenna port；Or,
Mode three：Base station selects a kind of fixed in advance from pre-defined various DM-RS resource mapping methods according to actual needs The DM-RS resource mapping methods of justice, according to the pre-defined DM-RS resource mapping methods, determine DM-RS in present sub-frame Mapping resource on antenna port where middle transmission, and send described for indicating to terminal by high-level signaling or PDCCH A kind of configuration information of the pre-defined DM-RS resource mapping methods of selection, or sent out to terminal by high-level signaling or PDCCH Send for indicating to whether there is the configuration information that DM-RS maps resource in a top n OFDM symbol for subframe；
Mode four：Base station according to actual needs, determines to map money with the presence or absence of DM-RS in the top n OFDM symbol of present sub-frame Source, when it is determined that in the presence of, selected from pre-defined various DM-RS resource mapping methods in a top n OFDM for subframe There is a kind of pre-defined DM-RS resource mapping methods that DM-RS maps resource in symbol, and according to described pre-defined DM-RS resource mapping methods, determine mapping resources of the DM-RS on the antenna port where transmission in present sub-frame；Or,
Method four：According to pre-defined DM-RS resource mapping methods, determine DM-RS in the day where transmission in present sub-frame Mapping resource on line end mouthful, the pre-defined DM-RS resource mapping methods are at least met in a top n for subframe There is DM-RS mapping resources at least one OFDM symbol in OFDM symbol；
Wherein, when using the mode three or mode four or method four, the pre-defined DM-RS resource mapping methods are pressed According to the definition of one of following method：
Method A：By the translation in time domain and/or frequency domain, by each DM- defined in LTE system version 10 in a subframe Part RE on RS antenna ports in DM-RS corresponding RE set, moves to the top n on the antenna port in a subframe In at least one of OFDM symbol OFDM symbol, the DM-RS resource mapping methods for obtaining；Or,
Method B：Based on the corresponding DM-RS resource mapping methods of each DM-RS antenna port defined in LTE system version 10, Increase DM-RS at least one of top n OFDM symbol on the antenna port in subframe OFDM symbol corresponding RE, by the corresponding RE of DM-RS in the DM-RS antenna port defined in increased RE and LTE system version 10 by time domain And/or the corresponding RE of DM-RS after the translation on frequency domain, the mapping money as DM-RS on the antenna port in present sub-frame The DM-RS resource mapping methods that source obtains；
When using methods described one or the mode one or methods described A, terminal maps money according to the DM-RS for determining Source, obtains the DM-RS transmitted in present sub-frame, specifically includes：
For conventional cyclic prefix CP, on each antenna port where DM-RS transmission in present sub-frame, DM-RS will be transmitted Used as one group, the DM-RS to being transmitted on every group of RE uses LTE systems to 4 RE of correspondence adjacent sub-carrier numbering in the RE for being used The corresponding length of the DM-RS antenna port of the system definition of version 10 is that 4 time domain orthogonal frequency expansion sequence is spread, with this The DM-RS is transmitted on antenna port.
29. base stations as claimed in claim 28, it is characterised in that the data transmission unit is used for：Using methods described When two or described modes two or method B, resource is mapped according to the DM-RS for determining as follows, DM-RS is mapped to It is transmitted in present sub-frame：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, transmission DM- is included by first four In the OFDM symbol of the RE that RS is used, the transmission DM-RS of the same subcarrier number of correspondence or adjacent sub-carrier numbering is made Used as one group, four include in the OFDM symbols for transmitting the RE that DM-RS is used 4 RE afterwards, the same subcarrier of correspondence 4 RE that the transmission DM-RS of numbering or adjacent sub-carrier numbering is used are used as one group；
The corresponding length of the DM-RS antenna port defined using LTE system version 10 to the DM-RS transmitted on one of which RE The time domain orthogonal frequency expansion sequence spent for 4 is spread, and it is fixed to LTE system version 10 that the DM-RS to being transmitted on another group of RE is used The corresponding length of the DM-RS antenna port of justice is that 4 time domain orthogonal frequency expansion sequence enters the time domain orthogonal obtained after line translation Frequency expansion sequence is spread, to transmit the DM-RS on the antenna port.
30. base stations as claimed in claim 29, it is characterised in that if two in the top n OFDM symbol of present sub-frame Increase the RE that transmission DM-RS is used in OFDM symbol, then the time domain orthogonal frequency expansion sequence for being obtained after the conversion is：By LTE The length of the definition of system version 10 is that the first two spreading factor and latter two spreading factor of 4 time domain orthogonal frequency expansion sequence are exchanged The time domain orthogonal frequency expansion sequence obtained behind position；Or,
If increasing the RE that transmission DM-RS is used in an OFDM symbol in the top n OFDM symbol of present sub-frame, institute Stating the time domain orthogonal frequency expansion sequence obtained after conversion is：The time domain orthogonal that the length that LTE system version 10 is defined is 4 is spread into sequence Last spreading factor in row moves the time domain orthogonal for obtaining and expands as first spreading factor after other spreading factors order Frequency sequence, or, by first spreading factor in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 4 Used as last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence for obtaining.
31. base stations as claimed in claim 28, it is characterised in that the data transmission unit is used for：Using methods described When two or described modes two or method B, resource is mapped according to the DM-RS for determining as follows, DM-RS is mapped to It is transmitted in present sub-frame：
For extension CP, if increase transmission DM-RS in two OFDM symbols in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, the RE that will be used comprising transmission DM-RS Multiple OFDM symbols in each two adjacent OFDM symbol on, the same subcarrier number of correspondence or adjacent sub-carrier numbering Used as one group, the DM-RS to being transmitted on every group of RE uses the institute that LTE system version 10 is defined to 2 RE that transmission DM-RS is used State the time domain orthogonal frequency expansion sequence that the corresponding length of DM-RS antenna port is 2 to be spread, to transmit institute on the antenna port State DM-RS；Or,
For extension CP, if increase transmission DM-RS in an OFDM symbol in the top n OFDM symbol of present sub-frame being made RE, then on each antenna port where DM-RS transmission in present sub-frame, to the institute defined in LTE system version 10 The DM-RS for being transmitted in DM-RS antenna port and being transmitted on the RE that DM-RS is used is stated, according to the mode that LTE system version 10 is defined Spread, to transmit the DM-RS on the antenna port；And,
To increase in the OFDM symbol of the RE for thering is transmission DM-RS to be used, immediate two transmission DM-RS is used on frequency domain 2 RE as one group, on every group of RE transmit DM-RS using LTE system version 10 define the DM-RS antenna port pair The length answered is 2 time domain orthogonal frequency expansion sequence；Or, the OFDM symbol and LTE of the RE for having transmission DM-RS to be used will be increased In first OFDM symbol of the RE used comprising transmission DM-RS defined in system version 10, the same subcarrier of correspondence Used as one group, the DM-RS transmitted on every group of RE uses fixed to LTE system version 10 2 RE of numbering or adjacent sub-carrier numbering The corresponding length of the DM-RS antenna port of justice is that 2 time domain orthogonal frequency expansion sequence enters the time domain orthogonal obtained after line translation Frequency expansion sequence is spread, to transmit the DM-RS on the antenna port.
32. base stations as claimed in claim 31, it is characterised in that the time domain orthogonal frequency expansion sequence obtained after the conversion is：
After two spreading factor exchange positions in time domain orthogonal frequency expansion sequence that the length that LTE system version 10 is defined is 2 The length for obtaining is 2 time domain orthogonal frequency expansion sequence.
33. base stations as claimed in claim 28, it is characterised in that the data transmission unit is used for：Using methods described Three or during mode three, resource is mapped according to the DM-RS for determining as follows, DM-RS is mapped in present sub-frame It is transmitted：
For conventional CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In multiple OFDM symbols of RE, two adjacent the 4 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 4 to spread sequence Row are spread, to transmit the DM-RS on the antenna port.
34. base stations as claimed in claim 28, it is characterised in that the data transmission unit is used for：Using methods described Three or during mode three, resource is mapped according to the DM-RS for determining as follows, DM-RS is mapped in present sub-frame It is transmitted：
For extension CP, on each antenna port where DM-RS transmission in present sub-frame, will be made comprising transmission DM-RS In each OFDM symbol of RE, two adjacent the 2 of subcarrier number RE are corresponded to as one group, to being transmitted on every group of RE DM-RS use time domain orthogonal that the corresponding length of the DM-RS antenna port that LTE system version 10 is defined is 2 to spread sequence Row are spread, to transmit the DM-RS on the antenna port.
35. base station as described in claim 28 to 34 is any, it is characterised in that present sub-frame is conventional descending sub frame or correspondence The special subframe of any one TDD special subframe configuration.
36. base stations as claimed in claim 35, it is characterised in that when present sub-frame is conventional descending sub frame, N be no more than 4 positive integer；And/or,
When present sub-frame is special subframe, N is the positive integer no more than 2 or the positive integer no more than 3.
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