CN103581094B - The transmission method of downlink user dedicated demodulation reference signal and equipment - Google Patents

The transmission method of downlink user dedicated demodulation reference signal and equipment Download PDF

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CN103581094B
CN103581094B CN201310055541.XA CN201310055541A CN103581094B CN 103581094 B CN103581094 B CN 103581094B CN 201310055541 A CN201310055541 A CN 201310055541A CN 103581094 B CN103581094 B CN 103581094B
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transmission
antenna port
ofdm symbol
resource
frame
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CN103581094A (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

The embodiment of the invention discloses transmission method and the equipment of a kind of downlink user dedicated demodulation reference signal DM RS, relate to wireless communication field, for improving the data demodulation performance on new carrier type NCT carrier wave.In the present invention, base station determines DM RS mapping resource in present sub-frame according to DM RS resource mapping method, resource is mapped according to the DM RS determined, DM RS is mapped in present sub-frame and is transmitted, terminal determines DM RS mapping resource in present sub-frame according to DM RS resource mapping method, map resource according to the DM RS determined, obtain the DM RS of transmission in present sub-frame.DM RS mapping resource at least includes that Resource Unit RE, N at least one OFDM symbol in the top n orthogonal frequency division multiplex OFDM symbol of present sub-frame are the integer not less than 1.Use the present invention, it is possible to increase the data demodulation performance on NCT carrier wave.

Description

The transmission method of downlink user dedicated demodulation reference signal and equipment
Technical field
The present invention relates to wireless communication field, particularly relate to the biography of a kind of downlink user dedicated demodulation reference signal Transmission method and equipment.
Background technology
The tradition of (Long Term Evolution-Advance, LTE-A) system is strengthened at Long Term Evolution (Legacy) on carrier wave, by OFDM (the Orthogonal Frequency in a descending sub frame Division Multiplexing, OFDM) symbol is divided into control area and data area two parts, control zone Territory is the top n OFDM symbol of this descending sub frame, as shown in Figure 1.Wherein, possible for N value is 1,2,3,4, and N=4 is only applicable to the carrier wave that system bandwidth is 1.4MHz.Bearing downlink controls information Legacy down channel, 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), transmit in control area；The down channel of bearing downlink data, such as Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) can only transmit in data area.I.e. PDCCH With PDSCH time multiplexed transmission.
The downlink reference signal that in lte-a system, solution is called mainly includes cell special reference (Cell-specific reference signals, CRS) and subscriber equipment (User Equipment, UE, also Claim terminal unit) dedicated demodulation reference signal (DeModulation Reference Signal, DM-RS). 9 kinds of downlink transfer patterns defined in lte-a system, UE which kind of transmission mode specifically used believed by high level Order is pre-configured with.Different downlink reference signals is applicable to different transmission modes.
CRS, for the signal demodulation of transmission mode 1 ~ 6, can support that single antenna port transmission (compile by antenna port Number p=0), two antenna ports transmission (antenna port numbering p=0,1) or four antenna ports transmit (antenna port Numbering p=0,1,2,3).1 Physical Resource Block the most corresponding by each time slot (slot) in a subframe (Physical Resource Block, PRB) referred to as 1 PRB is to (PRB pair), with a PRB pair For unit CRS resource mapping method as shown in Figure 2 a and 2 b, wherein, before Fig. 2 a is regular circulation Sewing the mapping mode under (Cyclic Prefix, CP), Fig. 2 b is the mapping mode under extension CP.CRS Full bandwidth at carrier wave transmits, and the most all transmits.
DM-RS, for the signal demodulation of transmission mode 7 ~ 9, can support 1 ~ 8 antenna port transmission, point It is positioned respectively at antenna port p=5, p=7, p=8orp=7,8 ..., υ+6, wherein υ is the layer of PDSCH transmission (Layer) number.DM-RS only sends on the PRB at the PDSCH transmission place that transmission mode is 7 ~ 9, To reduce reference marks expense, to save energy, the interference reduced between neighbor cell.Under Fig. 3 a(routine CP) Extend under CP with Fig. 3 b() it show DM-RS resource mapping method in units of a PRB pair, Wherein, DM-RS mapping resource on antenna port 7/8/11/13 is identical, at antenna port 9/10/12/14 On mapping resource identical.Ensure to use same map by the time domain orthogonal sequence shown in Tables 1 and 2 The orthogonality between DM-RS on the different antennae port of resource.Under extension CP, DM-RS does not supports Transmit at antenna port 9 ~ 14.Additionally, for time division duplex (Time Division Duplex, TDD) Descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS) a length of 3 OFDM in system (under the most descending conventional CP, DwPTS is 6592 T to the special subframe of symbolSSpecial subframe, downbound expansion Under CP, DwPTS is 7680 TSSpecial subframe, wherein TSTime interval is used for system), the most special son Frame configures 0 and uses the special subframe of descending conventional CP for 5 times, and special subframe configures 0 and makes for 4 times With the special subframe of downbound expansion CP, do not support that DM-RS transmits.
Table 1: under conventional CP, the DM-RS orthogonal sequence of different antennae port
Table 2: under extension CP, the DM-RS orthogonal sequence of different antennae port
In order to improve resource utilization ratio further, the version-11(Rel-11, Release of lte-a system 11) determine for carrier aggregation (Carrier Aggregation, CA) system introduces new carrier type (New Carrier Type, NCT), with strengthen system spectrum utilization rate, preferably support heterogeneous network, reduce merit Consumption.At present on NCT: do not transmit the legacy down channel of PDCCH equivalent-load Downlink Control Information, In order to improve NCT resource utilization, PDSCH can transmit (i.e. legacy in top n OFDM symbol Control area in the subframe defined on carrier wave), i.e. PDSCH can owning in a subframe Transmit in OFDM symbol；NCT only support use transmission mode 9 PDSCH transmission, can by with PDCCH on the legacy carrier wave of NCT polymerization is carried out across carrier dispatching, it is also possible to by the increasing on NCT Strong Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel, E-PDCCH) Scheduling；E-PDCCH with legacy PDCCH differs primarily in that, E-PDCCH Yu PDSCH frequency Dividing multiplexing transmission, therefore, E-PDCCH can also transmit in all OFDM symbol；NCT only supports In the CRS transmission that the upper 5ms of single antenna port (antenna port p=0) is the cycle, and CRS is only used for surveying Amount and tracking, be not used in demodulation；The down channels such as E-PDCCH, PDSCH on NCT need to be based on DM-RS Demodulation.
To sum up, in the DM-RS resource mapping method of Rel-10 definition, DM-RS is not in control area Transmitting in OFDM symbol, E-PDCCH and PDSCH on NCT is mapped in a subframe in time domain In all OFDM symbol on transmission time, at least the channel-estimation information in top n OFDM symbol need To carry out extrapolation algorithm through the DM-RS of limited row to obtain, reduce the data demodulation performance on NCT； And DM-RS does not support to transmit in the special subframe that DwPTS is 3 OFDM symbol, cause only wrapping Special subframe containing 3 OFDM symbol can not transmit downlink data based on DM-RS, reduce NCT Resource utilization.
Summary of the invention
The embodiment of the present invention provides transmission method and the equipment of a kind of downlink user dedicated demodulation reference signal, uses In the data demodulation performance improved on NCT carrier wave.
A kind of downlink user dedicated demodulation reference signal DM-RS transmission method, the method includes:
Terminal determines DM-RS mapping resource in present sub-frame according to DM-RS resource mapping method, Described DM-RS maps in the top n orthogonal frequency division multiplex OFDM symbol that resource at least includes present sub-frame At least one OFDM symbol on Resource Unit RE, N be the integer not less than 1；
Terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame.
A kind of downlink user dedicated demodulation reference signal DM-RS transmission method, the method includes:
Base station determines DM-RS mapping resource in present sub-frame according to DM-RS resource mapping method, Described DM-RS maps in the top n orthogonal frequency division multiplex OFDM symbol that resource at least includes present sub-frame At least one OFDM symbol on Resource Unit RE, N be the integer not less than 1；
Base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS Row transmission.
A kind of terminal, this terminal includes:
According to DM-RS resource mapping method, resource mapping unit, for determining that DM-RS is at present sub-frame In mapping resource, described DM-RS maps resource and at least includes the top n orthogonal frequency division multiplexing of present sub-frame It is whole not less than 1 with the Resource Unit RE, N at least one OFDM symbol in OFDM symbol Number；
Signal acquiring unit, for mapping resource according to the described DM-RS determined, obtains in present sub-frame The DM-RS of transmission.
A kind of base station, this base station includes:
According to DM-RS resource mapping method, resource mapping unit, for determining that DM-RS is at present sub-frame In mapping resource, described DM-RS maps resource and at least includes the top n orthogonal frequency division multiplexing of present sub-frame It is whole not less than 1 with the Resource Unit RE, N at least one OFDM symbol in OFDM symbol Number；
Data transmission unit, for mapping resource according to the described DM-RS determined, maps DM-RS It is transmitted in present sub-frame.
In the scheme that the embodiment of the present invention provides, in the control area of subframe i.e. top n OFDM symbol There is the mapping resource of DM-RS so that the channel-estimation information in top n OFDM symbol can pass through In this N number of OFDM symbol, the DM-RS of transmission carries out interpolation calculation and obtains, it is to avoid through in time domain away from Carry out extrapolation algorithm from the DM-RS of this N number of symbol limited row farther out to obtain, thus improve NCT Data demodulation performance, and ensure that DwPTS only comprises in the special subframe of 3 OFDM symbol and there is also DM-RS transmits, and then makes can transmit in these special subframes downlink data, thus improves NCT's Efficiency of transmission and the availability of frequency spectrum.
Accompanying drawing explanation
Fig. 1 is the multiplexing relation signal of control area and data area in a descending sub frame in prior art Figure；
Fig. 2 a is the CRS resource mapping method schematic diagram in prior art under conventional CP；
Fig. 2 b is to extend the CRS resource mapping method schematic diagram under CP in prior art；
Fig. 3 a is the DM-RS resource mapping method schematic diagram in prior art under conventional CP；
Fig. 3 b is to extend the DM-RS resource mapping method schematic diagram under CP in prior art；
The method flow schematic diagram that Fig. 4 provides for the embodiment of the present invention；
The other method schematic flow sheet that Fig. 5 provides for the embodiment of the present invention；
Fig. 6 a ~ Fig. 6 j is that the DM-RS resource of the embodiment of the present invention one maps schematic diagram；
Fig. 7 a ~ Fig. 7 i is that the DM-RS resource of the embodiment of the present invention two maps schematic diagram；
Fig. 8 a ~ Fig. 8 c is that the DM-RS resource of the embodiment of the present invention three maps schematic diagram；
Fig. 9 a ~ Fig. 9 c is that the DM-RS resource of the embodiment of the present invention four maps schematic diagram；
Figure 10 a ~ Figure 10 e is that the DM-RS resource of the embodiment of the present invention five maps schematic diagram；
Figure 11 a ~ Figure 11 d is that the DM-RS resource of the embodiment of the present invention six maps schematic diagram；
Figure 12 a ~ Figure 12 d is that the DM-RS resource of the embodiment of the present invention seven maps schematic diagram；
The device structure schematic diagram that Figure 13 provides for the embodiment of the present invention；
Another device structure schematic diagram that Figure 14 provides for the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention provides a kind of DM-RS transmission method being applicable to NCT carrier wave, in this method, The mapping resource of DM-RS is there is so that front N in the control area of subframe i.e. top n OFDM symbol Channel-estimation information in individual OFDM symbol can be by the DM-RS of transmission in this N number of OFDM symbol Carry out interpolation calculation to obtain, it is to avoid through the DM-RS of this N number of symbol of distance limited row farther out in time domain Carry out extrapolation algorithm to obtain, thus improve the data demodulation performance of NCT, and ensure that DwPTS only comprises The special subframe of 3 OFDM symbol there is also DM-RS transmission, and then make can in these special subframes To transmit downlink data, thus improve efficiency of transmission and the availability of frequency spectrum of NCT.
See Fig. 4, the DM-RS transmission method for end side that the embodiment of the present invention provides, including with Lower step:
Step 40: terminal determines DM-RS reflecting in present sub-frame according to DM-RS resource mapping method Penetrating resource, this DM-RS maps resource and at least includes in the top n OFDM symbol of present sub-frame at least Resource Unit (RE) in one OFDM symbol, N is the integer not less than 1；
Step 41: terminal, according to the DM-RS determined mapping resource in present sub-frame, obtains current son In frame, the DM-RS of transmission, i.e. obtains the DM-RS received in the mapping resource determined.
In step 40, according to DM-RS resource mapping method, terminal determines that DM-RS is in present sub-frame Map resource, implement one of the following four kinds of methods that can use:
Method one: terminal is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, by the translation in time domain and/or frequency domain, in present sub-frame, DM-RS transmits place Antenna port on, by this DM-RS antenna port defined in LTE system version 10 DM-RS pair Part RE in the RE set answered, moves at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；
I.e. based on the DM-RS resource mapping method that DM-RS antenna port each in Rel-10 is corresponding, On the basis of not changing DM-RS resource overhead (neither increase DM-RS and map resource), by existing The position having DM-RS to map resource is moved, and such as time domain and/or frequency domain translate, by this DM-RS resource Part DM-RS in the subframe that mapping mode determines maps resource and moves on to the top n of this subframe In at least 1 OFDM symbol in OFDM symbol；Said process can be regarded as UE worked as The process of the front DM-RS resource mapping method needing to use, and according to this DM-RS resource mapping method In RE position corresponding for DM-RS, determine that DM-RS maps resource, or can also be by said process Itself regard as UE based on the DM-RS method for mapping resource defined in Re-10, by predetermined translation Operation, directly obtains DM-RS and maps resource；Wherein DM-RS mapping resource is embodied in correspondence The RE of DM-RS；
Preferably, subframe Rel-10 DM-RS resource mapping method determined comprises DM-RS Map the DM-RS in part OFDM in the OFDM of resource and map resource, through time domain and/or flat Move, move in 1 in the top n OFDM symbol in this subframe or 2 OFDM symbol, its In, the DM-RS in different OFDM symbol maps resource and moves in top n OFDM symbol not In same OFDM symbol.
Method two: terminal is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, top n OFDM on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in symbol And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；
I.e. based on the DM-RS resource mapping method that DM-RS antenna port each in Rel-10 is corresponding, Increase DM-RS at least 1 OFDM symbol in the top n OFDM symbol of one subframe to map Resource；Said process can being regarded as, UE obtains the DM-RS resource mapping method being currently needed for using Process, and according to the RE position corresponding for DM-RS in this DM-RS resource mapping method, determine DM-RS maps resource；Or said process itself can also being regarded, UE is based on defined in Re-10 as DM-RS method for mapping resource, by increasing DM-RS resource operation, directly obtains DM-RS and maps money Source；
Preferably, based on Rel-10 DM-RS resource mapping method, according to this DM-RS resource mapping method In all or part of DM-RS map resource place sub-carrier positions, a subframe top n Increase DM-RS in OFDM 1 or 2 adjacent OFDM symbol and map resource.
Method three: terminal is according to by carrying in high-level signaling or Physical Downlink Control Channel (PDCCH) Configuration information determines DM-RS resource mapping method, and according to the described DM-RS resource mapping side determined Formula determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, and wherein, this is joined A kind of DM-RS resource mapping method of confidence breath instruction, or the top n OFDM symbol of one subframe of instruction In whether exist DM-RS map resource；
I.e. terminal passes through high-level signaling or PDCCH reception configuration information, and concrete according to this configuration information Instruction, determines actually used DM-RS resource mapping method；Wherein, described configuration information may indicate that Concrete a kind of DM-RS resource mapping method, this DM-RS resource mapping method is fixed in advance in system Justice, UE determines that in the system using the instruction of described configuration information, predefined multiple DM-RS resource is reflected Penetrate in mode a kind of；Or, whether described configuration information also can indicate that in top n OFDM symbol and deposits Mapping resource at DM-RS, UE can be the most predefined multiple according to described configuration information DM-RS resource mapping method selects to meet the one of configuration instruction, or when configuration information instruction exists Time, UE is according to predetermined move mode (such as said method 1) or increases the mode of DM-RS resource (as above State method 2), formed currently used on the basis of the DM-RS resource mapping method of Rel-10 definition DM-RS resource mapping method, and according to the RE corresponding for DM-RS in this DM-RS resource mapping method Position, determines that DM-RS maps resource, or the DM-RS resource mapping method in Rel-10 definition On the basis of directly determine DM-RS map resource；In the presence of configuration information instruction not, UE determines use The DM-RS resource mapping method of Rel-10 definition.
Method four: terminal, according to predefined DM-RS resource mapping method, determines that DM-RS is working as Transmitting the mapping resource on the antenna port at place in front subframe, described predefined DM-RS resource is reflected Penetrate mode the most satisfied: at least 1 OFDM symbol in the top n OFDM symbol of a subframe On exist DM-RS map resource.
I.e. terminal need not be formed further the DM-RS resource mapping method of needs, and system be can be used directly In the most defined DM-RS resource mapping method meeting above-mentioned condition, reflect according to this DM-RS resource Penetrate RE position corresponding for the DM-RS in mode, determine that DM-RS maps resource.
Concrete, terminal determines DM-RS according to by the configuration information carried in high-level signaling or PDCCH Resource mapping method, and according to the described DM-RS resource mapping method determined, determine that DM-RS is working as Mapping resource in front subframe, implementing can one of following four kinds of scheme:
Scheme one: terminal, according to the configuration information carried in high-level signaling or PDCCH, determines present sub-frame Top n OFDM symbol in whether exist DM-RS map resource, in the presence of determining, based in advance DM-RS resource mapping method defined in the rule of agreement and LTE system version 10, passes through time domain And/or the translation on frequency domain, in present sub-frame on the antenna port at DM-RS transmission place, by LTE system Part RE in the RE set that system is corresponding for DM-RS in this DM-RS antenna port defined in version 10, Move at least one OFDM symbol in the top n OFDM symbol of this subframe, after movement RE and residue RE not moved, as DM-RS money of the mapping on this antenna port in present sub-frame Source；
Scheme two: terminal, according to the configuration information carried in high-level signaling or PDCCH, determines present sub-frame Top n OFDM symbol in whether exist DM-RS map resource, in the presence of determining, based in advance DM-RS resource mapping method defined in the rule of agreement and LTE system version 10, at current son At least one OFDM in top n OFDM symbol on the antenna port at DM-RS transmission place in frame The RE that transmission DM-RS is used is increased, by the RE increased and LTE system version 10 on symbol RE corresponding for DM-RS in this DM-RS antenna port of definition, as DM-RS in present sub-frame Mapping resource on this antenna port；
Scheme three: terminal is according to the configuration information carried in high-level signaling or PDCCH, from predefined Multiple DM-RS resource mapping method selects the predefined DM-RS of the one indicated by this configuration information Resource mapping method, and according to this predefined DM-RS resource mapping method selected, determine DM-RS The mapping resource on the antenna port at place is transmitted in present sub-frame；
Scheme four: terminal, according to the configuration information carried in high-level signaling or PDCCH, determines present sub-frame Top n OFDM symbol in whether there is DM-RS and map resource, in the presence of determining, from fixed in advance The multiple DM-RS resource mapping method of justice selects exist in the top n OFDM symbol of a subframe DM-RS maps the one predefined DM-RS resource mapping method of resource, and according to select this is pre- The DM-RS resource mapping method first defined, determines that DM-RS transmits the antenna at place in present sub-frame Mapping resource on port；
Concrete, in said method four or scheme three or scheme four, when terminal is according to predefined DM-RS resource mapping method, when determining DM-RS mapping resource in present sub-frame, predefined DM-RS resource mapping method is specially one of following three kinds of modes:
Mode one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；
Mode two, corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol；
Mode three, meets in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and there is existence in the OFDM symbol of DM-RS mapping resource At least 1 group DM-RS maps resource, and often group DM-RS maps resource by the adjacent sub-load of correspondence at least 2 The RE composition of ripple numbering.
Concrete, using said method one or scheme one or mode for the moment, in step 41, terminal is according to really Fixed DM-RS maps resource, obtains the DM-RS of transmission in present sub-frame, can reuse Rel-10 definition Time domain orthogonal frequency expansion sequence corresponding to corresponding DM-RS antenna port DM-RS is despread, To ensure the orthogonality used between the antenna port of same asset mapping mode, implement and can be such that
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will transmission In the RE that DM-RS is used, 4 RE of corresponding same subcarrier number are as one group, to often group The DM-RS of the upper transmission of RE uses LTE system version 10 definition, current DM-RS antenna port pair The time domain orthogonal frequency expansion sequence of a length of 4 answered despreads, to obtain transmission on current antenna port DM-RS。
Concrete, using said method one or scheme one or mode for the moment, in step 41, terminal according to The DM-RS determined maps resource, obtains the DM-RS of transmission in present sub-frame, can reuse Rel-10 DM-RS is de-spread by the time domain orthogonal frequency expansion sequence that the corresponding DM-RS antenna port of definition is corresponding Frequently, to ensure the orthogonality used between the antenna port of same asset mapping mode, implementing can be as Under:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use LTE system version 10 definition, current to often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with obtain work as Front antenna port uploads defeated DM-RS；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use LTE system version 10 definition, current DM-RS to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain current antenna end The DM-RS of transmission on mouth；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Length that defeated DM-RS uses LTE system version 10 definition, that current DM-RS antenna port is corresponding Be 2 time domain orthogonal frequency expansion sequence despread, to obtain on current antenna port the DM-RS of transmission； Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE The time domain orthogonal frequency expansion sequence of that define, that current DM-RS antenna port is corresponding a length of 2 de-spreads Frequently, to obtain the DM-RS of transmission on current antenna port.
Concrete, when using said method two or scheme two or mode two, in step 41, terminal according to The DM-RS determined maps resource, obtains the DM-RS of transmission in present sub-frame, implements and can be such that
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE (DM-RS of the most corresponding former Rel-10 resource mapping method), corresponding same 4 RE that the transmission DM-RS of subcarrier number is used are as one group；
The DM-RS of transmission in one of which RE is used LTE system version 10 definition, current DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, to another group The DM-RS of the upper transmission of RE uses LTE system version 10 definition, current DM-RS antenna port The time domain orthogonal frequency expansion sequence that the time domain orthogonal frequency expansion sequence of corresponding a length of 4 obtains after converting is carried out Despread, to obtain the DM-RS of transmission on current antenna port.
Preferably, just 1 group of DM-RS in former Rel-10 resource mapping method is used in former Rel-10 Hand over sequence, 1 group of DM-RS that only part comprises the DM-RS in former Rel-10 resource mapping method is made With the orthogonal sequence after conversion, to ensure the compatibility with legacy terminal.
If it is also preferred that the left increasing in two OFDM symbol in the top n OFDM symbol of present sub-frame The RE that transmission DM-RS is used, then the time domain orthogonal frequency expansion sequence obtained after conversion is: by LTE system System version 10 definition, the first two spreading factor of the time domain orthogonal frequency expansion sequence of a length of 4 and latter two After spreading factor exchange position, the time domain orthogonal frequency expansion sequence obtained；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, then the time domain orthogonal frequency expansion sequence obtained after conversion is: by LTE system version 10 definition, last spreading factor in the time domain orthogonal frequency expansion sequence of a length of 4 are as first expansion Frequently the factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE system First spreading factor in time domain orthogonal frequency expansion sequence that version 10 defines, a length of 4 is as finally One spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
Concrete, when said method two or scheme two or mode two, in step 41, terminal is according to determining DM-RS maps resource, obtains the DM-RS of transmission in present sub-frame, implements and can be such that
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the current DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain current antenna end The DM-RS of transmission on mouth；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in DM-RS antenna port defined in LTE system version 10, current The DM-RS of transmission on the RE used, despreads according to the mode of LTE system version 10 definition, To obtain the DM-RS of transmission on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE The time domain orthogonal spread spectrum sequence of that system version 10 defines, that current DM-RS antenna port is corresponding a length of 2 Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10, first comprise in the OFDM symbol of RE that transmission DM-RS is used, corresponding with 2 RE of one subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE The time domain orthogonal spread spectrum sequence of that system version 10 defines, that current DM-RS antenna port is corresponding a length of 2 The time domain orthogonal frequency expansion sequence that row obtain after converting despreads, and transmits on this antenna port to obtain DM-RS.
It is also preferred that the left the time domain orthogonal frequency expansion sequence obtained after Bian Huan can be: by fixed for LTE system version 10 After two spreading factor exchange positions in the time domain orthogonal frequency expansion sequence of a length of the 2 of justice, the length obtained It it is the time domain orthogonal frequency expansion sequence of 2.
Concrete, when using aforesaid way three, in step 41, terminal maps according to the DM-RS determined Resource, obtains the DM-RS of transmission in present sub-frame, implements and can be such that
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
Concrete, when using aforesaid way three, in step 41, terminal maps according to the DM-RS determined Resource, obtains the DM-RS of transmission in present sub-frame, implements and can be such that
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission , the time domain orthogonal frequency expansion sequence of a length of 2 that current DM-RS antenna port is corresponding despread, To obtain the DM-RS of transmission on this antenna port.
In this method, present sub-frame is conventional descending sub frame or corresponding any one TDD special subframe configuration Special subframe.
When present sub-frame is conventional descending sub frame, N is the positive integer less than 4；And/or, at current son When frame is special subframe, N is the positive integer less than 2 or 3.
The mutual holistic approach flow process of terminal and base station is as follows:
Step one: base station determines DM-RS reflecting in present sub-frame according to DM-RS resource mapping method Penetrating resource, DM-RS mapping resource at least includes at least in the top n OFDM symbol of present sub-frame RE in individual OFDM symbol, N are the integer not less than 1；
Step 2: base station maps resource according to the DM-RS determined, DM-RS is mapped to present sub-frame In be transmitted；
Step 3: terminal determines DM-RS reflecting in present sub-frame according to DM-RS resource mapping method Penetrating resource, DM-RS mapping resource at least includes at least in the top n OFDM symbol of present sub-frame RE in individual OFDM symbol, N are the integer not less than 1；
Step 4: terminal maps resource according to the DM-RS determined, obtains transmission in present sub-frame DM-RS。
Need to ensure that the DM-RS resource mapping method that base station uses is reflected with the DM-RS resource that terminal uses Penetrate mode consistent.
See Fig. 5, the DM-RS transmission method for base station side that the embodiment of the present invention provides, including with Lower step:
Step 50: base station determines DM-RS reflecting in present sub-frame according to DM-RS resource mapping method Penetrating resource, DM-RS mapping resource at least includes at least in the top n OFDM symbol of present sub-frame RE in individual OFDM symbol, N are the integer not less than 1；
Step 51: base station maps resource according to the DM-RS determined, DM-RS is mapped to present sub-frame In be transmitted, i.e. map transmitted over resources DM-RS at the DM-RS that determines.
In step 50, according to DM-RS resource mapping method, base station determines that DM-RS is in present sub-frame Map resource, implement one of the following four kinds of methods that can use:
Method one: base station is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, by the translation in time domain and/or frequency domain, in present sub-frame, DM-RS transmits place Antenna port on, by this DM-RS antenna port defined in LTE system version 10 DM-RS pair Part RE in the RE set answered, moves at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；
Method two: base station is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, top n OFDM on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in symbol And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；
A kind of method three: base station determines DM-RS resource mapping method according to actual needs, according to this DM-RS Resource mapping method, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, And sending configuration information by high-level signaling or physical downlink control channel PDCCH to terminal, this configuration is believed A kind of DM-RS resource mapping method of breath instruction, or the top n OFDM symbol of one subframe of instruction is The no DM-RS that exists maps resource；
Method four: base station, according to predefined DM-RS resource mapping method, determines that DM-RS is working as Transmitting the mapping resource on the antenna port at place in front subframe, this predefined DM-RS resource maps Mode is the most satisfied: at least 1 OFDM symbol in the top n OFDM symbol of a subframe There is DM-RS and map resource.
Concrete, base station determines a kind of DM-RS resource mapping method according to actual needs, according to this DM-RS resource mapping method, determines that DM-RS transmits reflecting on the antenna port at place in present sub-frame Penetrating resource, and send configuration information by high-level signaling or PDCCH to terminal, implementing can be as follows One of three kinds of schemes:
Scheme one: whether base station according to actual needs, determines in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system version This DM-RS resource mapping method defined in 10, by the translation in time domain and/or frequency domain, currently In subframe on the antenna port at DM-RS transmission place, by this DM-RS defined in LTE system version 10 Part RE in RE set corresponding for DM-RS on antenna port, moves to the top n of this subframe In at least one OFDM symbol in OFDM symbol, by the RE after movement and the residue that do not moves RE, as DM-RS mapping resource on this antenna port in present sub-frame, and by high-level signaling or Whether PDCCH exists in the top n OFDM symbol of one subframe of instruction to terminal transmission DM-RS maps the configuration information (referring specifically to be shown as existence) of resource；
Scheme two: whether base station according to actual needs, determines in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system version This DM-RS resource mapping method defined in 10, the antenna at DM-RS transmission place in present sub-frame Transmission DM-RS institute is increased at least one OFDM symbol in top n OFDM symbol on port The RE used, by this DM-RS antenna port defined in the RE increased and LTE system version 10 The RE that upper DM-RS is corresponding, as DM-RS mapping resource on this antenna port in present sub-frame, And send the top n OFDM symbol for one subframe of instruction by high-level signaling or PDCCH to terminal Whether there is DM-RS in number and map the configuration information (referring specifically to be shown as existence) of resource；
Scheme three: base station is selected according to actual needs from predefined multiple DM-RS resource mapping method Select a kind of predefined DM-RS resource mapping method, according to this predefined DM-RS selected Resource mapping method, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, And it is predefined for the one indicating selection to terminal transmission by high-level signaling or PDCCH The configuration information of DM-RS resource mapping method, or be used for terminal transmission by high-level signaling or PDCCH Whether the top n OFDM symbol of one subframe of instruction exists DM-RS and maps the configuration information of resource (referring specifically to be shown as existence).
Concrete, when base station is according to predefined DM-RS resource mapping method, determine that DM-RS exists During mapping resource in present sub-frame, predefined DM-RS resource mapping method as follows it One definition:
Mode one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；
Mode two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol；
Mode three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
Concrete, using said method one or scheme one or mode for the moment, in step 51, base station according to The DM-RS determined maps resource, is mapped in present sub-frame by DM-RS and is transmitted, implements Can be such that
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will transmission In the RE that DM-RS is used, 4 RE of corresponding same subcarrier number are as one group, to often group The DM-RS of the upper transmission of RE uses LTE system version 10 definition, current DM-RS antenna port pair The time domain orthogonal frequency expansion sequence of a length of 4 answered spreads, described with transmission on this antenna port DM-RS。
Concrete, using said method one or scheme one or mode for the moment, in step 51, base station according to The DM-RS determined maps resource, is mapped in present sub-frame by DM-RS and is transmitted, implements Can be such that
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use LTE system version 10 definition, current to often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with at this antenna DM-RS is transmitted on port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use LTE system version 10 definition, current DM-RS to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated DM-RS；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Length that defeated DM-RS uses LTE system version 10 definition, that current DM-RS antenna port is corresponding Be 2 time domain orthogonal frequency expansion sequence spread, with on this antenna port transmit DM-RS；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE The time domain orthogonal frequency expansion sequence of that define, that current DM-RS antenna port is corresponding a length of 2 spreads, To transmit DM-RS on this antenna port.
Concrete, when using said method two or scheme two or mode two, in step 51, base station according to The DM-RS determined maps resource, is mapped in present sub-frame by DM-RS and is transmitted, implements Can be such that
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, to the upper transmission of RE of another group DM-RS use LTE system version 10 definition, length that current DM-RS antenna port is corresponding Be 4 time domain orthogonal frequency expansion sequence convert after the time domain orthogonal frequency expansion sequence that obtains spread, with Described DM-RS is transmitted on this antenna port.
If it is also preferred that the left increasing in two OFDM symbol in the top n OFDM symbol of present sub-frame The RE that transmission DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE System version 10 defines, the first two spreading factor and rear two of a length of 4 time domain orthogonal frequency expansion sequence After individual spreading factor exchange position, the time domain orthogonal frequency expansion sequence obtained；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Version 10 definition, last spreading factor in the time domain orthogonal frequency expansion sequence of a length of 4 are as the One spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor conduct in time domain orthogonal frequency expansion sequence that system version 10 defines, a length of 4 Last spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
Concrete, when using above-mentioned side two or scheme two or mode two, in step 51, base station is according to really Fixed DM-RS maps resource, is mapped in present sub-frame by DM-RS and is transmitted, and implementing can With as follows:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses LTE system version 10 definition, current DM-RS to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated DM-RS；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in DM-RS antenna port defined in LTE system version 10, current The DM-RS of transmission on the RE used, spreads according to the mode of LTE system version 10 definition, To transmit DM-RS on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE The time domain orthogonal spread spectrum sequence of that system version 10 defines, that current DM-RS antenna port is corresponding a length of 2 Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system The time domain orthogonal frequency expansion sequence of that system version 10 defines, that current DM-RS antenna port is corresponding a length of 2 The time domain orthogonal frequency expansion sequence obtained after converting spreads, to transmit on this antenna port DM-RS。
It is also preferred that the left the time domain orthogonal frequency expansion sequence obtained after Bian Huan is: that LTE system version 10 is defined, After two spreading factor exchange positions in the time domain orthogonal frequency expansion sequence of a length of 2, a length of 2 obtained Time domain orthogonal frequency expansion sequence.
Concrete, when using aforesaid way three, in step 51, base station maps according to the DM-RS determined Resource, is mapped to DM-RS in present sub-frame and is transmitted, implement and can be such that
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission , the time domain orthogonal frequency expansion sequence of a length of 4 that current DM-RS antenna port is corresponding spread, with This antenna port transmits described DM-RS.
Concrete, when using aforesaid way three, in step 51, base station maps according to the DM-RS determined Resource, is mapped to DM-RS in present sub-frame and is transmitted, implement and can be such that
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission , the time domain orthogonal frequency expansion sequence of a length of 2 that current DM-RS antenna port is corresponding spread, with This antenna port transmits described DM-RS.
In this method, present sub-frame is conventional descending sub frame or corresponding any one TDD special subframe configuration Special subframe.When present sub-frame is conventional descending sub frame, N is the positive integer less than 4；And/or, When present sub-frame is special subframe, N is the positive integer less than 2 or the positive integer less than 3.
Preferably, for the TDD special subframe configuration not supporting DM-RS to transmit in Rel-10, such as During descending conventional CP, TDD special subframe configuration 0 and 5, during downbound expansion CP, TDD special subframe Configuration 0 and 4, can use the DM-RS that the arbitrary TDD special subframe configuration obtained in the manner described above is corresponding Resource mapping method, only sends out according to DM-RS resource mapping method in the OFDM symbol of DwPTS place Send or receive DM-RS.
Preferably, when there is CRS transmission on NCT, the DM-RS resource mapping method in the present invention DM-RS should be avoided as far as possible to map the OFDM symbol at resource place and to map resource with comprising CRS OFDM symbol is overlapping；When there is synchronous transmission of signal on NCT, above-mentioned DM-RS resource mapping method The OFDM symbol that DM-RS should be avoided as far as possible to map resource place maps transmission place with synchronizing signal OFDM symbol is overlapping.
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 signaling Can be legacy PDCCH signaling or E-PDCCH signaling etc..Transmission DM-RS's in the present invention Antenna port can be antenna port 7 ~ 14.
Below in conjunction with specific embodiment, the present invention will be described:
Embodiment one: corresponding said method one or scheme one or mode one；
For conventional descending sub frame (i.e. descending sub frame in addition to TDD special subframe), by Rel-10 DM-RS in the DM-RS resource mapping method of respective antenna port maps resource, translates through time domain, Obtain the DM-RS resource mapping method as shown in Fig. 6 a to Fig. 6 j；
Such as: mode 1: first two columns DM-RS in Rel-10 is mapped resource and moves to the 2nd and the 3rd In OFDM symbol (or the 3rd and the 4th OFDM symbol), obtain under Fig. 6 a(routine CP) Extend under CP with Fig. 6 b()；
Mode 2: last string DM-RS in Rel-10 is mapped resource and moves to the 2nd OFDM symbol In (or the 3rd OFDM symbol), obtain under Fig. 6 c(routine CP) and Fig. 6 d(extension CP Under)；
Mode 3: first two columns DM-RS in Rel-10 is mapped resource and moves to the 1st and the 2nd OFDM On symbol (or the 2nd and the 3rd OFDM symbol), and next two columns DM-RS mapping resource is put down Move on to, in the 2nd and the 3rd OFDM symbol reciprocal, obtain under Fig. 6 e(routine CP) and Fig. 6 f(expansion Under exhibition CP)；
Mode 4: first two columns DM-RS in Rel-10 is mapped resource and moves to the 2nd and the 3rd OFDM Symbol (or the 1st and the 2nd OFDM symbol, or the 3rd and the 4th OFDM symbol) on, And next two columns DM-RS will map resource and move to 4th and the 5th OFDM symbol reciprocal and (or fall Several 5th and the 6th OFDM symbol) on, obtain under Fig. 6 g(routine CP) and Fig. 6 h(extension CP Under)；
Mode 5: first two columns DM-RS in Rel-10 is mapped resource and moves to the 2nd and the 3rd OFDM Symbol (or the 1st and the 2nd OFDM symbol, or the 3rd and the 4th OFDM symbol) on, And will next two columns DM-RS mapping resource move in the 4th and the 2nd OFDM symbol reciprocal respectively, Obtain under Fig. 6 i(routine CP) and Fig. 6 j(extension CP under).
Mode 1 can avoid the synchronizing signal in FDD system overlapping with DM-RS resource.
Mode 2 can avoid the synchronizing signal in TDD system overlapping with DM-RS resource.
When assuming to there is not CRS on NCT, mode 3 can be avoided in FDD and TDD system simultaneously Synchronizing signal is overlapping with DM-RS resource, or there is CRS and CRS and synchronization letter on hypothesis NCT Number transmission subframe difference time, definable is occupation mode 3 in synchronous transmission of signal subframe, and other subframes can make In other ways or method.
Mode 4 and mode 5 can avoid the synchronizing signal in FDD and TDD system to provide with DM-RS simultaneously Source is overlapping, but when there is CSI-RS transmission on NCT, need to limit CSI-RS at DM-RS place OFDM Mapping resource on symbol.
During time domain orthogonal spread spectrum:
For conventional CP, by DM-RS resource mapping method, corresponding same height in a descending sub frame The DM-RS of carrier index, as one group, reuses corresponding DM-RS in Rel-10 to often organizing DM-RS Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence (i.e. sequence in table 1)；
For extension CP, by DM-RS resource mapping method, in a descending sub frame, the first two comprises In the OFDM symbol of DM-RS, the DM-RS of corresponding same subcarrier number is as one group, latter two Comprise in the OFDM symbol of DM-RS that the DM-RS of corresponding same subcarrier number is as one group, right Often group DM-RS is just reusing in Rel-10 the time domain of corresponding DM-RS antenna port is corresponding a length of 2 Hand over frequency expansion sequence (i.e. sequence in table 2)；Or, by DM-RS resource mapping method, one is descending In subframe, the first two comprises the DM-RS work of corresponding adjacent sub-carrier numbering in the OFDM symbol of DM-RS Being one group, latter two comprises the DM-RS of corresponding adjacent sub-carrier numbering in the OFDM symbol of DM-RS As one group, reuse, to often organizing DM-RS, the length that in Rel-10, corresponding DM-RS antenna port is corresponding It is the time domain orthogonal frequency expansion sequence (i.e. sequence in table 2) of 2, such as, for Fig. 6 d, the first two is comprised In the OFDM symbol of DM-RS, corresponding subcarrier number is i and i+1(such as k1 and k2) DM-RS As one group, use the sequence in table 2；Or, by DM-RS resource mapping method, one is descending In subframe, the DM-RS of corresponding same subcarrier number is as one group, reuses Rel-10 to often organizing DM-RS In corresponding DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence (i.e. in table 2 Sequence), such as Fig. 6 d, by first and last comprise in the OFDM symbol of DM-RS right Answer the DM-RS of same subcarrier number as one group, comprise DM-RS's by second and the 3rd In OFDM symbol, the DM-RS of corresponding same subcarrier number is as one group, to often organizing in use table 2 Sequence；Or, by described DM-RS resource mapping method, same OFDM in a descending sub frame On two adjacent on frequency domain for DM-RS DM-RS as one group, reuse Rel-10 to often organizing DM-RS In corresponding DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence (i.e. in table 2 Sequence), the method goes for all OFDM symbol comprising DM-RS, or is only applicable to non- Continuous print comprises the OFDM symbol of DM-RS, for adjacent two the OFDM symbols comprising DM-RS Be grouped in time domain direction number according to the method described above, such as Fig. 6 d, only to first and last comprise DM-RS in the OFDM symbol of DM-RS, in frequency domain packet, comprises DM-RS to the 2nd and the 3rd OFDM symbol at time domain grouping；
Embodiment two: corresponding said method one or scheme one or mode one；
For TDD special subframe, by the DM-RS resource mapping method of respective antenna port in Rel-10 In DM-RS map resource, through time domain translate, obtain as shown in Fig. 7 a to Fig. 7 i DM-RS money Source mapping mode;
Such as, during conventional CP: mode 1: first two columns DM-RS in Rel-10 is mapped resource and moves to 1st and the 2nd OFDM symbol, obtains Fig. 7 a；
Mode 2: first two columns DM-RS in Rel-10 is mapped resource and moves to the 1st and the 2nd OFDM Symbol, and by next two columns DM-RS mapping resource, 2 are translated backward for special subframe configuration 1/2/6/7 OFDM symbol (or 1 OFDM symbol of translation backward), obtains Fig. 7 b；
Mode 3: first two columns DM-RS in Rel-10 is mapped resource and moves to the 2nd and the 3rd OFDM Symbol, obtains Fig. 7 c；
During extension CP: mode 1: first row DM-RS in Rel-10 is mapped resource and moves to the 1st OFDM symbol (or also can move on to the 2nd or the 3rd OFDM symbol), obtains Fig. 7 d；
Mode 2: first row DM-RS in Rel-10 is mapped resource and moves to the 1st OFDM symbol, And by secondary series DM-RS mapping resource translate backward 2 OFDM symbol (or backward translation 1 OFDM symbol), obtain Fig. 7 e；
Mode 3: first row DM-RS in Rel-10 is mapped resource and moves to the 2nd OFDM symbol, And secondary series DM-RS mapping resource is translated 2 OFDM symbol backward, obtain Fig. 7 f；
When assuming, on NCT, special subframe does not exists CRS, the mode 1 during conventional CP and mode 2, Mode 1 during extension CP can avoid the synchronizing signal in FDD system overlapping with DM-RS resource；
During time domain orthogonal spread spectrum: during conventional CP, adjacent in the time domain in a subframe two can be comprised DM-RS on the RE of the same subcarrier number of correspondence in the OFDM symbol of DM-RS is as 1 Group, often group is reused Rel-10 definition corresponding DM-RS antenna port corresponding a length of 2 time domain Sequence in orthogonal spreading sequence, i.e. table 2, with ensure use same asset mapping mode antenna port it Between orthogonality；Such as in Fig. 7 a antenna port 7/8/11/13, OFDM numbering l=0 and 1 two symbols DM-RS on two RE of upper corresponding k=k1 is 1 group, the DM-RS on two RE of corresponding k=k6 Being 1 group, the DM-RS on two RE of corresponding k=k11 is 1 group；During extension CP, by a subframe In two OFDM symbol comprising DM-RS on the same subcarrier number of correspondence RE on Often group, as 1 group, is reused the length that the corresponding DM-RS antenna port of Rel-10 definition is corresponding by DM-RS Degree is the sequence in the time domain orthogonal frequency expansion sequence of 2, i.e. table 2；Such as in Fig. 7 d OFDM numbering l=0 DM-RS on two RE of corresponding k=k1 is 1 group with on 5 two symbols, two of corresponding k=k4 DM-RS on RE is 1 group, and the DM-RS on two RE of corresponding k=k7 is 1 group, corresponding k=k10 Two RE on DM-RS be 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 on frequency domain, translate each k in A subcarrier, i.e. figure to high frequency or low frequency part and represent a son Carrier index, is also contained in the method, such as, on the basis of above-mentioned Fig. 6 d, carry out frequency domain further Translation, obtains the method for mapping resource as shown in Fig. 7 g to Fig. 7 i.
Embodiment three: corresponding said method two or scheme two or mode two；
For conventional descending sub frame, when descending conventional CP, according to respective antenna port in Rel-10 In DM-RS resource mapping method, DM-RS maps the sub-carrier positions at resource place, in a subframe the Increase DM-RS in 2 and the 3rd OFDM symbol and map resource, obtain DM-RS as shown in Figure 8 a Resource mapping method；
When downbound expansion CP, according to the DM-RS resource mapping method of respective antenna port in Rel-10 In comprise DM-RS and map the DM-RS in the first two of resource or latter two OFDM symbol and map resource The sub-carrier positions at place, increases DM-RS in a subframe and reflects in the 2nd and the 3rd OFDM symbol Penetrate resource, obtain the DM-RS resource mapping method as shown in Fig. 8 b or Fig. 8 c；Or can also be one In the 1st and the 2nd OFDM symbol in individual subframe, or in the 3rd and the 4th OFDM symbol, Increase DM-RS in the manner described above and map resource.
During time domain orthogonal spread spectrum: for Fig. 8 a, by numbering l=1, the OFDM of 2,5,6 in first time slot On symbol, the DM-RS of corresponding same subcarrier number is as one group, to 4 DM-RS in often group Use the orthogonal sequence after the evolution shown in table 3, by numbering l=5, the OFDM of 6 in first time slot Numbering l=5 in symbol and second time slot, 6 OFDM symbol on corresponding same subcarrier number DM-RS is as another group, and often 4 DM-RS in group use the orthogonal spreading sequence in Rel-10；Right In Fig. 8 b, Fig. 8 c, two adjacent OFDM symbol (numbering l=1 and the OFDM of 2 in i.e. first time slot Symbol, numbering l=4 and the OFDM symbol of 5, numbering l=4 and the OFDM symbol of 5 in second time slot Number) DM-RS of upper corresponding same subcarrier number is respectively one group, often 2 DM-RS in group Orthogonal spreading sequence in symbol use table 2.
Table 3: under conventional CP, the DM-RS orthogonal sequence of different antennae port
Embodiment four: corresponding said method two or scheme two or mode two；
For conventional descending sub frame, when descending conventional CP, according to respective antenna port in Rel-10 In DM-RS resource mapping method, DM-RS maps the sub-carrier positions at resource place, in a subframe the Increase DM-RS in 2 OFDM symbol and map resource, obtain DM-RS resource as illustrated in fig. 9 and reflect Penetrate mode；
When downbound expansion CP, according to the DM-RS resource mapping method of respective antenna port in Rel-10 In comprise DM-RS and map the DM-RS in the first two of resource or latter two OFDM symbol and map money The sub-carrier positions at place, source, increases DM-RS in a subframe and maps money in the 2nd OFDM symbol Source, obtains the DM-RS resource mapping method as shown in Fig. 9 b or Fig. 9 c；Or, it is also possible at one In subframe in the 1st or the 3rd or the 4th OFDM symbol, increase DM-RS in the manner described above Map resource.
Time domain orthogonal spreads: for Fig. 9 a, numbering l=1 in first time slot, the OFDM of 5,6 and The DM-RS conduct of corresponding same subcarrier number in the OFDM symbol of numbering l=5 in second time slot One group, numbering l=5 in numbering l=5, the OFDM symbol of 6 and second time slot in first time slot, 6 OFDM symbol on the DM-RS of corresponding same subcarrier number be another group, often 4 in group Sequence in DM-RS symbol use table 4；For Fig. 9 b, Fig. 9 c, former Rel-10DM-RS is reflected Penetrate resource, reuse the corresponding orthogonal spreading sequence in Rel-10 according to the packet mode in Rel-10, i.e. By numbering l=4 in first time slot, 5 OFDM symbol on the DM-RS of corresponding same sub-carrier numbering Be divided into one group, by numbering l=4 in second time slot, 5 OFDM symbol on corresponding same sub-carrier numbering DM-RS be divided into one group, respectively 2 DM-RS in often group are used the sequence in tables 2, for DM-RS in the OFDM symbol of the l=1 in first time slot is divided into one group on frequency domain two-by-two, such as In Fig. 9 c, the DM-RS of corresponding k=k2 and k=k5 is 1 group, the DM-RS of corresponding k=k8 and k=k11 Being 1 group, often 2 DM-RS in group use the sequence in table 2；Or, for Fig. 9 b, by first In numbering l=1 in individual time slot, the OFDM symbol of 4, the DM-RS of corresponding same sub-carrier numbering is divided into One group, 2 DM-RS in often group are used the orthogonal sequence after the evolution shown in tables 5, by the Numbering l=4 in one time slot, 5 OFDM symbol on the DM-RS of corresponding same sub-carrier numbering be divided into One group, by numbering l=4 in second time slot, 5 OFDM symbol on corresponding same sub-carrier numbering DM-RS is divided into one group, and 2 DM-RS in often group are used the sequence in Rel-10.
Table 4: under conventional CP, the DM-RS orthogonal sequence of different antennae port
Table 5: under extension CP, the DM-RS orthogonal sequence of different antennae port
Embodiment five: corresponding said method two or scheme two or mode two；
For TDD special subframe, when downbound expansion CP, according to respective antenna port in Rel-10 In DM-RS resource mapping method, DM-RS maps the sub-carrier positions at resource place, in a subframe the Increase DM-RS in 1 and the 2nd OFDM symbol and map resource, obtain DM-RS as shown in Figure 10 a Resource mapping method, or in a subframe, in the 2nd and the 3rd OFDM symbol, increase DM-RS reflects Penetrate resource, obtain DM-RS resource mapping method as shown in fig. lob, or in a subframe the 1st Increase DM-RS in individual OFDM symbol and map resource, obtain DM-RS resource as shown in figure l oc and reflect Penetrate mode, or in a subframe, in the 2nd OFDM symbol, increase DM-RS mapping resource, obtain DM-RS resource mapping method as shown in fig. 10d (can also in the 3rd OFDM symbol according on The mode of stating increases DM-RS and maps resource), or obtain after above-mentioned increase DM-RS maps resource On the basis of DM-RS pattern, carry out the translation of DM-RS time domain/frequency domain further, such as at one Subframe increases in the 1st and the 2nd OFDM symbol DM-RS and maps resource, and by former Rel-10 The DM-RS mapping resource of middle respective antenna port, to two OFDM symbol of right translation, obtains such as Figure 10 e Shown DM-RS resource mapping method.
During time domain orthogonal spread spectrum: resource is mapped for former Rel-10 DM-RS, according to the packet in Rel-10 Mode reuses the corresponding orthogonal spreading sequence in Rel-10, numbering l=4 in i.e. first time slot, 5 In OFDM symbol, the DM-RS of corresponding same sub-carrier numbering is divided into one group, uses the length in Rel-10 It it is the orthogonal spreading sequence of 2；For Figure 10 a or Figure 10 b, newly increase DM-RS and map the numbering of resource Corresponding same subcarrier number in the OFDM symbol of the OFDM symbol of l=0 and 1 or l=1 and 2 DM-RS is as one group, and often 2 DM-RS symbols in group use the orthogonal of a length of 2 in Rel-10 Frequency expansion sequence；Figure 10 c and Figure 10 d is increased in the 1st or the 2nd OFDM symbol of DM-RS DM-RS is divided into one group on frequency domain two-by-two, and the DM-RS of such as corresponding k=k1 and k=k4 is 1 group, right The DM-RS answering k=k7 and k=k10 is 1 group, and often 2 DM-RS in group use the sequence in table 2, Or, by numbering l=0, the OFDM symbol (corresponding diagram 10c) of 4 or numbering l=1 in first time slot, The DM-RS of the upper corresponding same sub-carrier numbering of the OFDM symbol (corresponding diagram 10d) of 4 is divided into one group, Orthogonal sequence after often 2 DM-RS in group use the evolution shown in table 5, by first time slot Middle numbering l=4,5 OFDM symbol on the DM-RS of corresponding same sub-carrier numbering be divided into one group, often 2 DM-RS in group use the orthogonal spreading sequence of a length of 2 in Rel-10.
Embodiment six: corresponding aforesaid way three；
For conventional descending sub frame, the DM-RS resource mapping method shown in Figure 11 a ~ Figure 11 d can be used； Or, it is also possible to the same frequency position in as illustrated, the 1st or the 3rd in first time slot OFDM symbol (conventional CP can also be in the OFDM symbol of the 4th of first time slot), second Second-to-last OFDM symbol in time slot or the 1st or the 2nd or the 3rd OFDM in second time slot On symbol, (conventional CP can also be in the OFDM symbol of the 4th of second time slot) places DM-RS Map resource.
During time domain orthogonal spread spectrum: for Figure 11 a, a subframe will comprise two OFDM of DM-RS On symbol, the DM-RS of corresponding two adjacent subcarrier number is as one group, such as antenna port 7/8/11/13, numbering l=5 in the OFDM symbol of numbering l=1 and in second time slot in first time slot OFDM symbol on corresponding subcarrier number be the DM-RS of k2 and k3 as 1 group, for antenna end Mouth 9/10/12/14, numbers in the OFDM symbol of numbering l=1 and in second time slot in first time slot In the OFDM symbol of l=5 corresponding subcarrier number be the DM-RS of k0 and k1 as 1 group, often in group 4 DM-RS symbol use tables 1 in orthogonal spreading sequence；For Figure 11 b ~ Figure 11 d, by one Subframe comprises corresponding two adjacent subcarrier number in each OFDM symbol of DM-RS DM-RS is as one group, such as in Figure 11 c, right in the OFDM symbol of numbering l=1 in first time slot The DM-RS answering subcarrier number to be k1 and k2 is as 1 group, and often 2 DM-RS symbols in group make With the orthogonal spreading sequence in table 2, or, for Figure 11 b and Figure 11 c, a subframe will comprise DM-RS Two OFDM symbol on the DM-RS of corresponding same sub-carrier numbering as one group, such as in Figure 11 c, The OFDM of numbering l=4 in the OFDM symbol of numbering l=1 and in second time slot in first time slot On symbol corresponding subcarrier number be the DM-RS of k1 as 1 group, often 2 DM-RS symbols in group Use the orthogonal spreading sequence in table 2.
The program can avoid the synchronizing signal in FDD and TDD system overlapping with DM-RS resource simultaneously.
Embodiment seven: corresponding aforesaid way three；
For TDD special subframe, the DM-RS resource mapping method shown in Figure 12 a ~ Figure 12 d can be used； Or, it is also possible to the same frequency position in as illustrated, the 1st OFDM in first time slot In symbol (conventional CP can also be in the OFDM symbol of the 4th of first time slot), first time slot Last or penultimate OFDM symbol place DM-RS and map resource.
Time domain orthogonal spread spectrum is similar with the conventional descending sub frame in above-described embodiment six.
The program can avoid the synchronizing signal in FDD and TDD system overlapping with DM-RS resource simultaneously.
Particularly, special subframe configuration 9 under TDD special subframe, make in aforementioned manners defined in TDD Special subframe configures the DM-RS resource mapping method of 8 correspondences, and only at the DwPTS of this special subframe Corresponding OFDM symbol set exists DM-RS transmission.
Above-mentioned DM-RS resource mapping method can combine with DM-RS cost reduction scheme use, By treaty rule or high-rise configuration information, select to use the DM-RS resource mapping method of cost reduction Or above-mentioned DM-RS resource mapping method, wherein the DM-RS resource mapping method of cost reduction also may be used According to make an appointment rule or the DM-RS resource mapping method in this patent is entered by high-rise configuration information Row time domain and/or frequency domain truncate obtain.
Seeing Figure 13, the embodiment of the present invention provides a kind of terminal, and this terminal includes:
According to DM-RS resource mapping method, resource mapping unit 70, for determining that DM-RS is at current son Mapping resource in frame, described DM-RS maps resource and at least includes the top n orthogonal frequency of present sub-frame Resource Unit RE, N at least one OFDM symbol in multiplexing OFDM symbol are not less than 1 Integer；
Signal acquiring unit 71, for mapping resource according to the described DM-RS determined, obtains present sub-frame The DM-RS of middle transmission.
Further, described resource mapping unit 70 is used for: provide according to DM-RS one of as follows Source mapping mode determines DM-RS mapping resource in present sub-frame:
Method one: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, by the translation in time domain and/or frequency domain, DM-RS transmission place in present sub-frame On antenna port, DM-RS in this DM-RS antenna port defined in LTE system version 10 is corresponding RE set in part RE, move at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；Or,
Method two: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, the top n OFDM symbol on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in number And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
Method three: according to by the configuration information carried in high-level signaling or physical downlink control channel PDCCH, Determine DM-RS resource mapping method, and determine according to the described DM-RS resource mapping method determined DM-RS transmits the mapping resource on the antenna port at place, wherein said configuration information in present sub-frame In a kind of DM-RS resource mapping method of instruction, or the top n OFDM symbol of one subframe of instruction whether There is DM-RS and map resource；Or,
Method four: according to predefined DM-RS resource mapping method, determines that DM-RS is at current son Frame transmits the mapping resource on the antenna port at place, described predefined DM-RS resource mapping side Formula at least meets existence at least 1 OFDM symbol in the top n OFDM symbol of a subframe DM-RS maps resource.
Further, described resource mapping unit 70 is used for: one of as follows according to being believed by high level The configuration information that carries in order or PDCCH, determines DM-RS resource mapping method, and according to described really Fixed DM-RS resource mapping method determines DM-RS mapping resource in present sub-frame:
According to described configuration information, determine in the top n OFDM symbol of present sub-frame and whether exist DM-RS maps resource, in the presence of determining, based on the rule made an appointment and LTE system version 10 Defined in DM-RS resource mapping method, by the translation in time domain and/or frequency domain, in present sub-frame On the antenna port at DM-RS transmission place, by this DM-RS antenna defined in LTE system version 10 Part RE in RE set corresponding for DM-RS on port, moves to top n OFDM of this subframe In at least one OFDM symbol in symbol, by the RE after movement and residue RE that do not moves, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
According to described configuration information, determine in the top n OFDM symbol of present sub-frame and whether exist DM-RS maps resource, in the presence of determining, based on the rule made an appointment and LTE system version 10 Defined in DM-RS resource mapping method, in present sub-frame DM-RS transmission place antenna port On top n OFDM symbol at least one OFDM symbol on increase transmission DM-RS used RE, by increase RE and LTE system version 10 defined in this DM-RS antenna port on The RE that DM-RS is corresponding, as DM-RS mapping resource on this antenna port in present sub-frame；Or Person,
According to described configuration information select from predefined multiple DM-RS resource mapping method described in join One predefined DM-RS resource mapping method indicated by confidence breath, and according to described pre-defined DM-RS resource mapping method, determine that DM-RS transmits on the antenna port at place in present sub-frame Mapping resource；Or,
According to described configuration information, determine in the top n OFDM symbol of present sub-frame and whether exist DM-RS maps resource, in the presence of determining, from predefined multiple DM-RS resource mapping method The one that there is DM-RS mapping resource in the top n OFDM symbol of a subframe is selected to pre-define DM-RS resource mapping method, and according to described predefined DM-RS resource mapping method, really Determine the mapping resource that DM-RS transmits on the antenna port at place in present sub-frame.
Further, map according to described predefined DM-RS resource when described resource mapping unit 70 Mode, when determining DM-RS mapping resource in present sub-frame, described predefined DM-RS provides One of the as follows definition of source mapping mode:
Mode one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Mode two, corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Mode three, meets in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
Further, described signal acquiring unit 71 is used for: using described method for the moment, according to as follows Method maps resource according to the described DM-RS determined, the DM-RS of transmission in acquisition present sub-frame:
For conventional cyclic prefix CP, in present sub-frame on each antenna port at DM-RS transmission place, In the RE used transmission DM-RS, 4 RE of corresponding same subcarrier number are as one group, right Often on group RE, the DM-RS of transmission uses the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of corresponding a length of 4 despreads, to obtain transmission on this antenna port DM-RS。
Further, described signal acquiring unit 71 is used for: using described method for the moment, according to as follows Method maps resource according to the described DM-RS determined, the DM-RS of transmission in acquisition present sub-frame:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use described in LTE system version 10 definition often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with obtain should The DM-RS of transmission on antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain this antenna port The DM-RS of upper transmission；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Defeated DM-RS uses corresponding a length of of the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of 2 despreads, to obtain the DM-RS of transmission on this antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE Definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, To obtain the DM-RS of transmission on this antenna port.
Further, described signal acquiring unit 71 is used for: when using described method two, according to as follows Method maps resource according to the described DM-RS determined, the DM-RS of transmission in acquisition present sub-frame:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, to another group RE upload Defeated DM-RS uses the length that the described DM-RS antenna port to LTE system version 10 definition is corresponding Be 4 time domain orthogonal frequency expansion sequence convert after the time domain orthogonal frequency expansion sequence that obtains despread, with Obtain the DM-RS of transmission on this antenna port.
Further, if increasing in two OFDM symbol in the top n OFDM symbol of present sub-frame Adding the RE that transmission DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: will LTE system version 10 definition a length of 4 time domain orthogonal frequency expansion sequence the first two spreading factor and after The time domain orthogonal frequency expansion sequence obtained after two spreading factor exchange positions；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Last spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of version 10 definition is as first Individual spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of system version 10 definition is as Later spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
Further, described signal acquiring unit 71 is used for: when using described method two, according to as follows Method maps resource according to the described DM-RS determined, the DM-RS of transmission in acquisition present sub-frame:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain this antenna port The DM-RS of upper transmission；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in the described DM-RS antenna port defined in LTE system version 10 The DM-RS of transmission on the RE used, despreads according to the mode of LTE system version 10 definition, To obtain the DM-RS of transmission on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal spread spectrum sequence Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence enter The time domain orthogonal frequency expansion sequence obtained after line translation despreads, to obtain transmission on this antenna port DM-RS。
Further, the time domain orthogonal frequency expansion sequence obtained after described conversion is:
In the time domain orthogonal frequency expansion sequence of a length of 2 that LTE system version 10 is defined two spread spectrums because of The time domain orthogonal frequency expansion sequence of a length of 2 obtained after sub-exchange position.
Further, described signal acquiring unit 71 is used for: when using described method three, according to as follows Method maps resource according to the described DM-RS determined, the DM-RS of transmission in acquisition present sub-frame:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
Further, described signal acquiring unit 71 is used for: when using described method three, according to as follows Method maps resource according to the described DM-RS determined, the DM-RS of transmission in acquisition present sub-frame:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
Further, present sub-frame is conventional descending sub frame or corresponding any one TDD special subframe configuration Special subframe.
Further, when present sub-frame is conventional descending sub frame, N is the positive integer less than 4；With/ Or, when present sub-frame is special subframe, N is the positive integer less than 2 or is less than 3 positive integers.
Seeing Figure 14, the embodiment of the present invention provides a kind of base station, and this base station includes:
According to DM-RS resource mapping method, resource mapping unit 80, for determining that DM-RS is at current son Mapping resource in frame, described DM-RS maps resource and at least includes the top n orthogonal frequency of present sub-frame Resource Unit RE, N at least one OFDM symbol in multiplexing OFDM symbol are not less than 1 Integer；
Data transmission unit 81, for mapping resource according to the described DM-RS determined, reflects DM-RS It is mapped in present sub-frame be transmitted.
Further, described resource mapping unit 80 is used for: provide according to DM-RS one of as follows Source mapping mode determines DM-RS mapping resource in present sub-frame:
Method one: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, by the translation in time domain and/or frequency domain, DM-RS transmission place in present sub-frame On antenna port, DM-RS in this DM-RS antenna port defined in LTE system version 10 is corresponding RE set in part RE, move at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；Or,
Method two: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, the top n OFDM symbol on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in number And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
A kind of method three: determine DM-RS resource mapping method according to actual needs, according to this DM-RS Resource mapping method, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, And send configuration information, described configuration by high-level signaling or physical downlink control channel PDCCH to terminal A kind of DM-RS resource mapping method of information instruction, or in the top n OFDM symbol of one subframe of instruction Whether there is DM-RS and map resource；Or,
Method four: according to predefined DM-RS resource mapping method, determines that DM-RS is at current son Frame transmits the mapping resource on the antenna port at place, described predefined DM-RS resource mapping side Formula at least meets existence at least 1 OFDM symbol in the top n OFDM symbol of a subframe DM-RS maps resource.
Further, described resource mapping unit 80 is used for: one of as follows according to actual needs Determine a kind of DM-RS resource mapping method, according to this DM-RS resource mapping method, determine DM-RS The mapping resource on the antenna port at place is transmitted in present sub-frame, and by high-level signaling or PDCCH To terminal transmission configuration information:
According to actual needs, determine in the top n OFDM symbol of present sub-frame and whether there is DM-RS Map resource, in the presence of determining, based on defined in the rule made an appointment and LTE system version 10 DM-RS resource mapping method, by the translation in time domain and/or frequency domain, DM-RS in present sub-frame On the antenna port at transmission place, by this DM-RS antenna port defined in LTE system version 10 Part RE in RE set corresponding for DM-RS, moves in the top n OFDM symbol of this subframe At least one OFDM symbol on, by the RE after movement and residue RE that do not moves, as DM-RS The mapping resource on this antenna port in present sub-frame, and sent out to terminal by high-level signaling or PDCCH Send the configuration that whether there is DM-RS mapping resource in the top n OFDM symbol of one subframe of instruction Information；Or,
According to actual needs, determine in the top n OFDM symbol of present sub-frame and whether there is DM-RS Map resource, in the presence of determining, based on defined in the rule made an appointment and LTE system version 10 DM-RS resource mapping method, in present sub-frame DM-RS transmission place antenna port on front N The RE that transmission DM-RS is used is increased at least one OFDM symbol in individual OFDM symbol, will In this DM-RS antenna port defined in the RE increased and LTE system version 10, DM-RS is corresponding RE, as DM-RS mapping resource on this antenna port in present sub-frame, and pass through high-level signaling Or whether PDCCH exists in the top n OFDM symbol of one subframe of instruction to terminal transmission DM-RS maps the configuration information of resource；Or,
Select one fixed in advance according to actual needs from predefined multiple DM-RS resource mapping method The DM-RS resource mapping method of justice, according to described predefined DM-RS resource mapping method, really Determine the mapping resource that DM-RS transmits on the antenna port at place in present sub-frame, and pass through high-level signaling Or PDCCH sends for indicating the one predefined DM-RS resource of described selection to map to terminal The configuration information of mode, or sent for one subframe of instruction to terminal by high-level signaling or PDCCH Whether top n OFDM symbol exists DM-RS and maps the configuration information of resource.
Further, map according to described predefined DM-RS resource when described resource mapping unit 80 Mode, when determining DM-RS mapping resource in present sub-frame, described predefined DM-RS provides One of the as follows definition of source mapping mode:
Mode one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Mode two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Mode three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
Further, described data transmission unit 81 is used for: using described method for the moment, according to as follows Method maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated:
For conventional cyclic prefix CP, in present sub-frame on each antenna port at DM-RS transmission place, In the RE used transmission DM-RS, 4 RE of corresponding same subcarrier number are as one group, right Often on group RE, the DM-RS of transmission uses the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of corresponding a length of 4 spreads, described with transmission on this antenna port DM-RS。
Further, described data transmission unit 81 is used for: using described method for the moment, according to as follows Method maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use described in LTE system version 10 definition often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with at this antenna Described DM-RS is transmitted on port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated described DM-RS；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Defeated DM-RS uses corresponding a length of of the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of 2 spreads, to transmit described DM-RS on this antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE Definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, To transmit described DM-RS on this antenna port.
Further, described data transmission unit 81 is used for: when using described method two, according to as follows Method maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, to the upper transmission of RE of another group DM-RS use corresponding a length of of described DM-RS antenna port to LTE system version 10 definition The time domain orthogonal frequency expansion sequence that the time domain orthogonal frequency expansion sequence of 4 obtains after converting spreads, with at this Described DM-RS is transmitted on antenna port.
Further, if increasing in two OFDM symbol in the top n OFDM symbol of present sub-frame Adding the RE that transmission DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: will LTE system version 10 definition a length of 4 time domain orthogonal frequency expansion sequence the first two spreading factor and after The time domain orthogonal frequency expansion sequence obtained after two spreading factor exchange positions；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Last spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of version 10 definition is as first Individual spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of system version 10 definition is as Later spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
Further, described data transmission unit 81 is used for: when using described method two, according to as follows Method maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated described DM-RS；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in the described DM-RS antenna port defined in LTE system version 10 The DM-RS of transmission on the RE used, spreads according to the mode of LTE system version 10 definition, To transmit described DM-RS on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal spread spectrum sequence Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence enter The time domain orthogonal frequency expansion sequence obtained after line translation spreads, described with transmission on this antenna port DM-RS。
Further, the time domain orthogonal frequency expansion sequence obtained after described conversion is:
In the time domain orthogonal frequency expansion sequence of a length of 2 that LTE system version 10 is defined two spread spectrums because of The time domain orthogonal frequency expansion sequence of a length of 2 obtained after sub-exchange position.
Further, described data transmission unit 81 is used for: when using described method three, according to as follows Method maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, with Described DM-RS is transmitted on this antenna port.
Further, described data transmission unit 81 is used for: when using described method three, according to as follows Method maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with Described DM-RS is transmitted on this antenna port.
Further, present sub-frame is conventional descending sub frame or corresponding any one TDD special subframe configuration Special subframe.
Further, when present sub-frame is conventional descending sub frame, N is the positive integer less than 4；With/ Or, when present sub-frame is special subframe, N is the positive integer less than 2 or the positive integer less than 3.
To sum up, the beneficial effect comprise that
In the scheme that the embodiment of the present invention provides, in the control area of subframe i.e. top n OFDM symbol There is the mapping resource of DM-RS so that the channel-estimation information in top n OFDM symbol can pass through In this N number of OFDM symbol, the DM-RS of transmission carries out interpolation calculation and obtains, it is to avoid through in time domain away from Carry out extrapolation algorithm from the DM-RS of this N number of symbol limited row farther out to obtain, thus improve NCT Data demodulation performance on carrier wave.
Further, in the scheme that the embodiment of the present invention provides, can apply in special subframe, for LTE Rel-10 does not support the TDD special subframe configuration that DM-RS transmits, during the most descending conventional CP, TDD Special subframe configuration 0 and 5, during downbound expansion CP, TDD special subframe configuration 0 and 4, can be according to this The method that invention is supplied to obtains the DM-RS resource mapping method that the configuration of arbitrary TDD special subframe is corresponding, Thus do not support also to transmit DM-RS on the special subframe that DM-RS transmits in Rel-10, and then permissible In special subframe, carry out downlink data transmission based on DM-RS, thus improve the resource of NCT carrier wave Utilization rate.
The present invention is with reference to method, equipment (system) and computer program product according to embodiments of the present invention The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and / or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/ Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.

Claims (56)

1. a downlink user dedicated demodulation reference signal DM-RS transmission method, it is characterised in that the party Method includes:
Terminal determines DM-RS mapping resource in present sub-frame according to DM-RS resource mapping method, Described DM-RS maps in the top n orthogonal frequency division multiplex OFDM symbol that resource at least includes present sub-frame At least one OFDM symbol on Resource Unit RE, N be the integer not less than 1；
Terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame；
Wherein, according to DM-RS resource mapping method, described terminal determines that DM-RS is in present sub-frame Map resource, specifically include one of following method:
Method one: terminal is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, by the translation in time domain and/or frequency domain, in present sub-frame, DM-RS transmits place Antenna port on, by this DM-RS antenna port defined in LTE system version 10 DM-RS pair Part RE in the RE set answered, moves at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；Or,
Method two: terminal is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, top n OFDM on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in symbol And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
Method three: terminal is according to by the configuration carried in high-level signaling or physical downlink control channel PDCCH Information, determines DM-RS resource mapping method, and according to the described DM-RS resource mapping method determined Determine that DM-RS transmits the mapping resource on the antenna port at place, wherein said configuration in present sub-frame A kind of DM-RS resource mapping method of information instruction, or in the top n OFDM symbol of one subframe of instruction Whether there is DM-RS and map resource；Or,
Method four: terminal, according to predefined DM-RS resource mapping method, determines that DM-RS is working as Transmitting the mapping resource on the antenna port at place in front subframe, described predefined DM-RS resource is reflected Mode of penetrating at least meets at least 1 OFDM symbol in the top n OFDM symbol of a subframe There is DM-RS and map resource.
2. the method for claim 1, it is characterised in that described terminal according to by high-level signaling or The configuration information carried in PDCCH, determine DM-RS resource mapping method, and determines according to described DM-RS resource mapping method determines DM-RS mapping resource in present sub-frame, specifically includes such as lower section One of method:
Method one: terminal, according to described configuration information, determines in the top n OFDM symbol of present sub-frame Whether there is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system System DM-RS resource mapping method defined in version 10, by the translation in time domain and/or frequency domain, In present sub-frame on the antenna port at DM-RS transmission place, by being somebody's turn to do defined in LTE system version 10 Part RE in RE set corresponding for DM-RS in DM-RS antenna port, moves to the front N of this subframe In at least one OFDM symbol in individual OFDM symbol, by the RE after movement and do not move surplus Remaining RE, as DM-RS mapping resource on this antenna port in present sub-frame；Or,
Method two: terminal, according to described configuration information, determines in the top n OFDM symbol of present sub-frame Whether there is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system System DM-RS resource mapping method defined in version 10, DM-RS transmission place in present sub-frame Transmission DM-RS is increased at least one OFDM symbol in top n OFDM symbol on antenna port The RE used, by this DM-RS antenna end defined in the RE increased and LTE system version 10 RE corresponding for DM-RS on mouth, as DM-RS mapping resource on this antenna port in present sub-frame； Or,
Method three: terminal is according to described configuration information, from predefined multiple DM-RS resource mapping side Formula selects the predefined DM-RS resource mapping method of the one indicated by described configuration information, and root According to described predefined DM-RS resource mapping method, determine that DM-RS transmits institute in present sub-frame Antenna port on mapping resource；Or,
Method four: terminal, according to described configuration information, determines in the top n OFDM symbol of present sub-frame Whether there is DM-RS and map resource, in the presence of determining, from predefined multiple DM-RS resource Mapping mode selects there is DM-RS in the top n OFDM symbol of a subframe and maps the one of resource Plant predefined DM-RS resource mapping method, and reflect according to described predefined DM-RS resource Penetrate mode, determine that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame.
3. the method for claim 1, it is characterised in that when described terminal is according to described fixed in advance The DM-RS resource mapping method of justice, when determining DM-RS mapping resource in present sub-frame, described One of the as follows definition of predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
4. method as claimed in claim 2, it is characterised in that when described terminal is according to described fixed in advance The DM-RS resource mapping method of justice, when determining DM-RS mapping resource in present sub-frame, described One of the as follows definition of predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
5. the method as described in any one of claim 1-4, it is characterised in that using described method one Time, terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame, Specifically include:
For conventional cyclic prefix CP, in present sub-frame on each antenna port at DM-RS transmission place, In the RE used transmission DM-RS, 4 RE of corresponding same subcarrier number are as one group, right Often on group RE, the DM-RS of transmission uses the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of corresponding a length of 4 despreads, to obtain transmission on this antenna port DM-RS。
6. the method as described in any one of claim 1-4, it is characterised in that using described method one Time, terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame, Specifically include:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use described in LTE system version 10 definition often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with obtain should The DM-RS of transmission on antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain this antenna port The DM-RS of upper transmission；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Defeated DM-RS uses corresponding a length of of the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of 2 despreads, to obtain the DM-RS of transmission on this antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE Definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, To obtain the DM-RS of transmission on this antenna port.
7. the method as described in any one of claim 1-4, it is characterised in that using described method two Time, terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame, Specifically include:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, to another group RE upload Defeated DM-RS uses the length that the described DM-RS antenna port to LTE system version 10 definition is corresponding Be 4 time domain orthogonal frequency expansion sequence convert after the time domain orthogonal frequency expansion sequence that obtains despread, with Obtain the DM-RS of transmission on this antenna port.
8. method as claimed in claim 7, it is characterised in that if in top n OFDM of present sub-frame The RE that transmission DM-RS is used is increased in two OFDM symbol in symbol, after the most described conversion To time domain orthogonal frequency expansion sequence be: the time domain orthogonal of a length of 4 defined by LTE system version 10 expands The time domain orthogonal spread spectrum obtained after the first two spreading factor of frequency sequence and latter two spreading factor exchange position Sequence；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Last spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of version 10 definition is as first Individual spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of system version 10 definition is as Later spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
9. the method as described in any one of claim 1-4, it is characterised in that using described method two Time, terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame, Specifically include:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain this antenna port The DM-RS of upper transmission；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in the described DM-RS antenna port defined in LTE system version 10 The DM-RS of transmission on the RE used, despreads according to the mode of LTE system version 10 definition, To obtain the DM-RS of transmission on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal spread spectrum sequence Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence enter The time domain orthogonal frequency expansion sequence obtained after line translation despreads, to obtain transmission on this antenna port DM-RS。
10. method as claimed in claim 9, it is characterised in that the time domain orthogonal obtained after described conversion Frequency expansion sequence is:
In the time domain orthogonal frequency expansion sequence of a length of 2 that LTE system version 10 is defined two spread spectrums because of The time domain orthogonal frequency expansion sequence of a length of 2 obtained after sub-exchange position.
11. methods as described in claim 3 or 4, it is characterised in that when using described method three, Terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame, specifically Including:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
12. methods as described in claim 3 or 4, it is characterised in that when using described method three, Terminal maps resource according to the described DM-RS determined, obtains the DM-RS of transmission in present sub-frame, specifically Including:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
13. the method for claim 1, it is characterised in that present sub-frame be conventional descending sub frame or The special subframe of corresponding any one TDD special subframe configuration.
14. methods as claimed in claim 13, it is characterised in that be conventional descending son at present sub-frame During frame, N is the positive integer less than 4；And/or,
When present sub-frame is special subframe, N is the positive integer less than 2 or the positive integer less than 3.
15. 1 kinds of downlink user dedicated demodulation reference signal DM-RS transmission methods, it is characterised in that should Method includes:
Base station determines DM-RS mapping resource in present sub-frame according to DM-RS resource mapping method, Described DM-RS maps in the top n orthogonal frequency division multiplex OFDM symbol that resource at least includes present sub-frame At least one OFDM symbol on Resource Unit RE, N be the integer not less than 1；
Base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS Row transmission；
Wherein, according to DM-RS resource mapping method, described base station determines that DM-RS is in present sub-frame Map resource, specifically include one of following method:
Method one: base station is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, by the translation in time domain and/or frequency domain, in present sub-frame, DM-RS transmits place Antenna port on, by this DM-RS antenna port defined in LTE system version 10 DM-RS pair Part RE in the RE set answered, moves at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；Or,
Method two: base station is based on the DM-RS defined in the rule made an appointment and LTE system version 10 Resource mapping method, top n OFDM on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in symbol And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
A kind of method three: base station determines DM-RS resource mapping method according to actual needs, according to this DM-RS Resource mapping method, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, And send configuration information, described configuration by high-level signaling or physical downlink control channel PDCCH to terminal A kind of DM-RS resource mapping method of information instruction, or in the top n OFDM symbol of one subframe of instruction Whether there is DM-RS and map resource；Or,
Method four: base station, according to predefined DM-RS resource mapping method, determines that DM-RS is working as Transmitting the mapping resource on the antenna port at place in front subframe, described predefined DM-RS resource is reflected Mode of penetrating at least meets at least 1 OFDM symbol in the top n OFDM symbol of a subframe There is DM-RS and map resource.
16. methods as claimed in claim 15, it is characterised in that described base station is the most true Fixed a kind of DM-RS resource mapping method, according to this DM-RS resource mapping method, determines that DM-RS exists Present sub-frame transmits the mapping resource on the antenna port at place, and by high-level signaling or physical down control Channel PDCCH processed sends configuration information to terminal, specifically includes one of following method:
Method one: whether base station according to actual needs, determines in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system version This DM-RS resource mapping method defined in 10, by the translation in time domain and/or frequency domain, currently In subframe on the antenna port at DM-RS transmission place, by this DM-RS defined in LTE system version 10 Part RE in RE set corresponding for DM-RS on antenna port, moves to the top n of this subframe In at least one OFDM symbol in OFDM symbol, by the RE after movement and the residue that do not moves RE, as DM-RS mapping resource on this antenna port in present sub-frame, and by high-level signaling or Whether PDCCH exists in the top n OFDM symbol of one subframe of instruction to terminal transmission DM-RS maps the configuration information of resource；Or,
Method two: whether base station according to actual needs, determines in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system version This DM-RS resource mapping method defined in 10, the antenna at DM-RS transmission place in present sub-frame Transmission DM-RS institute is increased at least one OFDM symbol in top n OFDM symbol on port The RE used, by this DM-RS antenna port defined in the RE increased and LTE system version 10 The RE that upper DM-RS is corresponding, as DM-RS mapping resource on this antenna port in present sub-frame, And send the top n OFDM symbol for one subframe of instruction by high-level signaling or PDCCH to terminal Whether there is DM-RS in number and map the configuration information of resource；Or,
Method three: base station is selected according to actual needs from predefined multiple DM-RS resource mapping method Select a kind of predefined DM-RS resource mapping method, according to described predefined DM-RS resource Mapping mode, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, and The one sent for indicating described selection to terminal by high-level signaling or PDCCH is predefined The configuration information of DM-RS resource mapping method, or be used for terminal transmission by high-level signaling or PDCCH Whether the top n OFDM symbol of one subframe of instruction exists DM-RS and maps the configuration information of resource.
17. methods as claimed in claim 15, it is characterised in that when described base station according to described in advance The DM-RS resource mapping method of definition, when determining DM-RS mapping resource in present sub-frame, institute State one of the as follows definition of predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
18. methods as claimed in claim 16, it is characterised in that when described base station according to described in advance The DM-RS resource mapping method of definition, when determining DM-RS mapping resource in present sub-frame, institute State one of the as follows definition of predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
19. methods as described in any one of claim 15-18, it is characterised in that using described method For the moment, base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS It is transmitted, specifically includes:
For conventional cyclic prefix CP, in present sub-frame on each antenna port at DM-RS transmission place, In the RE used transmission DM-RS, 4 RE of corresponding same subcarrier number are as one group, right Often on group RE, the DM-RS of transmission uses the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of corresponding a length of 4 spreads, described with transmission on this antenna port DM-RS。
20. methods as described in any one of claim 15-18, it is characterised in that using described method For the moment, base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS It is transmitted, specifically includes:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use described in LTE system version 10 definition often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with at this antenna Described DM-RS is transmitted on port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated described DM-RS；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Defeated DM-RS uses corresponding a length of of the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of 2 spreads, to transmit described DM-RS on this antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE Definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, To transmit described DM-RS on this antenna port.
21. methods as described in any one of claim 15-18, it is characterised in that using described method When two, base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS It is transmitted, specifically includes:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, to the upper transmission of RE of another group DM-RS use corresponding a length of of described DM-RS antenna port to LTE system version 10 definition The time domain orthogonal frequency expansion sequence that the time domain orthogonal frequency expansion sequence of 4 obtains after converting spreads, with at this Described DM-RS is transmitted on antenna port.
22. methods as claimed in claim 21, it is characterised in that if in top n OFDM of present sub-frame The RE that transmission DM-RS is used is increased in two OFDM symbol in symbol, after the most described conversion To time domain orthogonal frequency expansion sequence be: the time domain orthogonal of a length of 4 defined by LTE system version 10 expands The time domain orthogonal spread spectrum obtained after the first two spreading factor of frequency sequence and latter two spreading factor exchange position Sequence；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Last spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of version 10 definition is as first Individual spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of system version 10 definition is as Later spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
23. methods as described in any one of claim 15-18, it is characterised in that using described method When two, base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS It is transmitted, specifically includes:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated described DM-RS；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in the described DM-RS antenna port defined in LTE system version 10 The DM-RS of transmission on the RE used, spreads according to the mode of LTE system version 10 definition, To transmit described DM-RS on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal spread spectrum sequence Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence enter The time domain orthogonal frequency expansion sequence obtained after line translation spreads, described with transmission on this antenna port DM-RS。
24. methods as claimed in claim 23, it is characterised in that the time domain obtained after described conversion is just Friendship frequency expansion sequence is:
In the time domain orthogonal frequency expansion sequence of a length of 2 that LTE system version 10 is defined two spread spectrums because of The time domain orthogonal frequency expansion sequence of a length of 2 obtained after sub-exchange position.
25. methods as described in claim 17 or 18, it is characterised in that when using described method three, Base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated, specifically include:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, with Described DM-RS is transmitted on this antenna port.
26. methods as described in claim 17 or 18, it is characterised in that when using described method three, Base station maps resource according to the described DM-RS determined, is mapped in present sub-frame by DM-RS and passes Defeated, specifically include:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with Described DM-RS is transmitted on this antenna port.
27. methods as claimed in claim 15, it is characterised in that present sub-frame is conventional descending sub frame Or the special subframe of correspondence any one TDD special subframe configuration.
28. methods as claimed in claim 27, it is characterised in that be conventional descending son at present sub-frame During frame, N is the positive integer less than 4；And/or,
When present sub-frame is special subframe, N is the positive integer less than 2 or the positive integer less than 3.
29. 1 kinds of terminals, it is characterised in that this terminal includes:
According to DM-RS resource mapping method, resource mapping unit, for determining that DM-RS is at present sub-frame In mapping resource, described DM-RS maps resource and at least includes the top n orthogonal frequency division multiplexing of present sub-frame It is whole not less than 1 with the Resource Unit RE, N at least one OFDM symbol in OFDM symbol Number；
Signal acquiring unit, for mapping resource according to the described DM-RS determined, obtains in present sub-frame The DM-RS of transmission；
Wherein, described resource mapping unit is used for: map according to DM-RS resource one of as follows Mode determines DM-RS mapping resource in present sub-frame:
Method one: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, by the translation in time domain and/or frequency domain, DM-RS transmission place in present sub-frame On antenna port, DM-RS in this DM-RS antenna port defined in LTE system version 10 is corresponding RE set in part RE, move at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；Or,
Method two: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, the top n OFDM symbol on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in number And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
Method three: according to by the configuration information carried in high-level signaling or physical downlink control channel PDCCH, Determine DM-RS resource mapping method, and determine according to the described DM-RS resource mapping method determined DM-RS transmits the mapping resource on the antenna port at place, wherein said configuration information in present sub-frame In a kind of DM-RS resource mapping method of instruction, or the top n OFDM symbol of one subframe of instruction whether There is DM-RS and map resource；Or,
Method four: according to predefined DM-RS resource mapping method, determines that DM-RS is at current son Frame transmits the mapping resource on the antenna port at place, described predefined DM-RS resource mapping side Formula at least meets existence at least 1 OFDM symbol in the top n OFDM symbol of a subframe DM-RS maps resource.
30. terminals as claimed in claim 29, it is characterised in that described resource mapping unit is used for: One of as follows according to by the configuration information carried in high-level signaling or PDCCH, determine DM-RS Resource mapping method, and determine that DM-RS is currently according to the described DM-RS resource mapping method determined Mapping resource in subframe:
Whether method one: according to described configuration information, determine in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system version This DM-RS resource mapping method defined in 10, by the translation in time domain and/or frequency domain, currently In subframe on the antenna port at DM-RS transmission place, by this DM-RS defined in LTE system version 10 Part RE in RE set corresponding for DM-RS on antenna port, moves to the top n of this subframe In at least one OFDM symbol in OFDM symbol, by the RE after movement and the residue that do not moves RE, as DM-RS mapping resource on this antenna port in present sub-frame；Or,
Whether method two: according to described configuration information, determine in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, based on the rule made an appointment and LTE system version This DM-RS resource mapping method defined in 10, the antenna at DM-RS transmission place in present sub-frame Transmission DM-RS institute is increased at least one OFDM symbol in top n OFDM symbol on port The RE used, by this DM-RS antenna port defined in the RE increased and LTE system version 10 The RE that upper DM-RS is corresponding, as DM-RS mapping resource on this antenna port in present sub-frame； Or,
Method three: select from predefined multiple DM-RS resource mapping method according to described configuration information Select the predefined DM-RS resource mapping method of the one indicated by described configuration information, and according to described Predefined DM-RS resource mapping method, determines that DM-RS transmits the sky at place in present sub-frame Mapping resource on line cap；Or,
Whether method four: according to described configuration information, determine in the top n OFDM symbol of present sub-frame There is DM-RS and map resource, in the presence of determining, map from predefined multiple DM-RS resource Mode selects there is DM-RS in the top n OFDM symbol of a subframe and maps a kind of pre-of resource The DM-RS resource mapping method first defined, and according to described predefined DM-RS resource mapping side Formula, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame.
31. terminals as claimed in claim 29, it is characterised in that when described resource mapping unit according to Described predefined DM-RS resource mapping method, determines DM-RS mapping money in present sub-frame During source, one of the as follows definition of described predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
32. terminals as claimed in claim 30, it is characterised in that when described resource mapping unit according to Described predefined DM-RS resource mapping method, determines DM-RS mapping money in present sub-frame During source, one of the as follows definition of described predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
33. terminals as described in any one of claim 29-32, it is characterised in that described signal acquisition list Unit is used for: is using described method for the moment, is mapping money according to the described DM-RS determined as follows Source, the DM-RS of transmission in acquisition present sub-frame:
For conventional cyclic prefix CP, in present sub-frame on each antenna port at DM-RS transmission place, In the RE used transmission DM-RS, 4 RE of corresponding same subcarrier number are as one group, right Often on group RE, the DM-RS of transmission uses the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of corresponding a length of 4 despreads, to obtain transmission on this antenna port DM-RS。
34. terminals as described in any one of claim 29-32, it is characterised in that described signal acquisition list Unit is used for: is using described method for the moment, is mapping money according to the described DM-RS determined as follows Source, the DM-RS of transmission in acquisition present sub-frame:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use described in LTE system version 10 definition often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with obtain should The DM-RS of transmission on antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain this antenna port The DM-RS of upper transmission；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Defeated DM-RS uses corresponding a length of of the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of 2 despreads, to obtain the DM-RS of transmission on this antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE Definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, To obtain the DM-RS of transmission on this antenna port.
35. terminals as described in any one of claim 29-32, it is characterised in that described signal acquisition list Unit is used for: when using described method two, maps money according to the described DM-RS determined as follows Source, the DM-RS of transmission in acquisition present sub-frame:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, to another group RE upload Defeated DM-RS uses the length that the described DM-RS antenna port to LTE system version 10 definition is corresponding Be 4 time domain orthogonal frequency expansion sequence convert after the time domain orthogonal frequency expansion sequence that obtains despread, with Obtain the DM-RS of transmission on this antenna port.
36. terminals as claimed in claim 35, it is characterised in that if in top n OFDM of present sub-frame The RE that transmission DM-RS is used is increased in two OFDM symbol in symbol, after the most described conversion To time domain orthogonal frequency expansion sequence be: the time domain orthogonal of a length of 4 defined by LTE system version 10 expands The time domain orthogonal spread spectrum obtained after the first two spreading factor of frequency sequence and latter two spreading factor exchange position Sequence；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Last spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of version 10 definition is as first Individual spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of system version 10 definition is as Later spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
37. terminals as described in any one of claim 29-32, it is characterised in that described signal acquisition list Unit is used for: when using described method two, maps money according to the described DM-RS determined as follows Source, the DM-RS of transmission in acquisition present sub-frame:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, to obtain this antenna port The DM-RS of upper transmission；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in the described DM-RS antenna port defined in LTE system version 10 The DM-RS of transmission on the RE used, despreads according to the mode of LTE system version 10 definition, To obtain the DM-RS of transmission on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal spread spectrum sequence Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence enter The time domain orthogonal frequency expansion sequence obtained after line translation despreads, to obtain transmission on this antenna port DM-RS。
38. terminals as claimed in claim 37, it is characterised in that the time domain obtained after described conversion is just Friendship frequency expansion sequence is:
In the time domain orthogonal frequency expansion sequence of a length of 2 that LTE system version 10 is defined two spread spectrums because of The time domain orthogonal frequency expansion sequence of a length of 2 obtained after sub-exchange position.
39. terminals as described in claim 31 or 32, it is characterised in that described signal acquiring unit is used In: when using described method three, map resource according to the described DM-RS determined as follows, The DM-RS of transmission in acquisition present sub-frame:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
40. terminals as described in claim 31 or 32, it is characterised in that described signal acquiring unit is used In: when using described method three, map resource according to the described DM-RS determined as follows, The DM-RS of transmission in acquisition present sub-frame:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence despread, with Obtain the DM-RS of transmission on this antenna port.
41. terminals as claimed in claim 29, it is characterised in that present sub-frame is conventional descending sub frame Or the special subframe of correspondence any one TDD special subframe configuration.
42. terminals as claimed in claim 41, it is characterised in that be conventional descending son at present sub-frame During frame, N is the positive integer less than 4；And/or,
When present sub-frame is special subframe, N is the positive integer less than 2 or is less than 3 positive integers.
43. 1 kinds of base stations, it is characterised in that this base station includes:
According to DM-RS resource mapping method, resource mapping unit, for determining that DM-RS is at present sub-frame In mapping resource, described DM-RS maps resource and at least includes the top n orthogonal frequency division multiplexing of present sub-frame It is whole not less than 1 with the Resource Unit RE, N at least one OFDM symbol in OFDM symbol Number；
Data transmission unit, for mapping resource according to the described DM-RS determined, maps DM-RS It is transmitted in present sub-frame；
Wherein, described resource mapping unit is used for: map according to DM-RS resource one of as follows Mode determines DM-RS mapping resource in present sub-frame:
Method one: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, by the translation in time domain and/or frequency domain, DM-RS transmission place in present sub-frame On antenna port, DM-RS in this DM-RS antenna port defined in LTE system version 10 is corresponding RE set in part RE, move at least one in the top n OFDM symbol of this subframe In OFDM symbol, by the RE after movement and residue RE that do not moves, as DM-RS at current son Mapping resource on this antenna port in frame；Or,
Method two: provide based on the DM-RS defined in the rule made an appointment and LTE system version 10 Source mapping mode, the top n OFDM symbol on the antenna port at DM-RS transmission place in present sub-frame The RE that transmission DM-RS is used, the RE that will increase is increased at least one OFDM symbol in number And corresponding for DM-RS RE in this DM-RS antenna port defined in LTE system version 10, make For DM-RS mapping resource on this antenna port in present sub-frame；Or,
A kind of method three: determine DM-RS resource mapping method according to actual needs, according to this DM-RS Resource mapping method, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, And send configuration information, described configuration by high-level signaling or physical downlink control channel PDCCH to terminal A kind of DM-RS resource mapping method of information instruction, or in the top n OFDM symbol of one subframe of instruction Whether there is DM-RS and map resource；Or,
Method four: according to predefined DM-RS resource mapping method, determines that DM-RS is at current son Frame transmits the mapping resource on the antenna port at place, described predefined DM-RS resource mapping side Formula at least meets existence at least 1 OFDM symbol in the top n OFDM symbol of a subframe DM-RS maps resource.
44. base stations as claimed in claim 43, it is characterised in that described resource mapping unit is used for: Determine one of as follows a kind of DM-RS resource mapping method according to actual needs, according to this DM-RS resource mapping method, determines that DM-RS transmits reflecting on the antenna port at place in present sub-frame Penetrate resource, and send configuration information by high-level signaling or PDCCH to terminal:
Whether method one: according to actual needs, determine in the top n OFDM symbol of present sub-frame and exist DM-RS maps resource, in the presence of determining, based on the rule made an appointment and LTE system version 10 Defined in DM-RS resource mapping method, by the translation in time domain and/or frequency domain, in present sub-frame On the antenna port at DM-RS transmission place, by this DM-RS antenna defined in LTE system version 10 Part RE in RE set corresponding for DM-RS on port, moves to top n OFDM of this subframe In at least one OFDM symbol in symbol, by the RE after movement and residue RE that do not moves, make For DM-RS mapping resource on this antenna port in present sub-frame, and by high-level signaling or PDCCH Send to terminal in the top n OFDM symbol of one subframe of instruction, whether there is DM-RS mapping money The configuration information in source；Or,
Whether method two: according to actual needs, determine in the top n OFDM symbol of present sub-frame and exist DM-RS maps resource, in the presence of determining, based on the rule made an appointment and LTE system version 10 Defined in DM-RS resource mapping method, in present sub-frame DM-RS transmission place antenna port On top n OFDM symbol at least one OFDM symbol on increase transmission DM-RS used RE, by increase RE and LTE system version 10 defined in this DM-RS antenna port on The RE that DM-RS is corresponding, as DM-RS mapping resource on this antenna port in present sub-frame, and The top n OFDM symbol for one subframe of instruction is sent to terminal by high-level signaling or PDCCH In whether exist DM-RS map resource configuration information；Or,
Method three: select one according to actual needs from predefined multiple DM-RS resource mapping method Plant predefined DM-RS resource mapping method, map according to described predefined DM-RS resource Mode, determines that DM-RS transmits the mapping resource on the antenna port at place in present sub-frame, and passes through High-level signaling or PDCCH send the predefined DM-RS of one for indicating described selection to terminal The configuration information of resource mapping method, or sent for instruction one to terminal by high-level signaling or PDCCH Whether the top n OFDM symbol of individual subframe exists DM-RS and maps the configuration information of resource.
45. base stations as claimed in claim 43, it is characterised in that when described resource mapping unit according to Described predefined DM-RS resource mapping method, determines DM-RS mapping money in present sub-frame During source, one of the as follows definition of described predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
46. base stations as claimed in claim 44, it is characterised in that when described resource mapping unit according to Described predefined DM-RS resource mapping method, determines DM-RS mapping money in present sub-frame During source, one of the as follows definition of described predefined DM-RS resource mapping method:
Method one: by the translation in time domain and/or frequency domain, by LTE system version 10 in a subframe Part RE in RE set corresponding for DM-RS in each DM-RS antenna port of definition, moves to In one subframe at least one OFDM symbol in the top n OFDM symbol on this antenna port, The DM-RS resource mapping method obtained；Or,
Method two: corresponding based on each DM-RS antenna port defined in LTE system version 10 DM-RS resource mapping method, in a subframe in the top n OFDM symbol on this antenna port RE corresponding to DM-RS, the DM-RS resource mapping method obtained is increased at least one OFDM symbol； Or,
Method three: meet in each DM-RS antenna port in a subframe, there is DM-RS and reflect The OFDM symbol penetrating resource is non-conterminous, and existence at least 1 group in described OFDM symbol is by correspondence extremely The DM-RS of the RE composition of few 2 adjacent sub-carriers numbering maps resource.
47. base stations as described in any one of claim 43-46, it is characterised in that the transmission of described data is single Unit is used for: is using described method for the moment, is mapping money according to the described DM-RS determined as follows Source, is mapped to DM-RS in present sub-frame and is transmitted:
For conventional cyclic prefix CP, in present sub-frame on each antenna port at DM-RS transmission place, In the RE used transmission DM-RS, 4 RE of corresponding same subcarrier number are as one group, right Often on group RE, the DM-RS of transmission uses the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of corresponding a length of 4 spreads, described with transmission on this antenna port DM-RS。
48. base stations as described in any one of claim 43-46, it is characterised in that the transmission of described data is single Unit is used for: is using described method for the moment, is mapping money according to the described DM-RS determined as follows Source, is mapped to DM-RS in present sub-frame and is transmitted:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 2 RE that transmission DM-RS is used are as one group, and latter two comprises what transmission DM-RS was used In the OFDM symbol of RE, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group, use described in LTE system version 10 definition often organizing the DM-RS of transmission on RE DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with at this antenna Described DM-RS is transmitted on port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by front two In the individual OFDM symbol comprising the RE that transmission DM-RS is used, the biography of corresponding adjacent sub-carrier numbering 2 RE that defeated DM-RS is used are as one group, and latter two comprises the RE that transmission DM-RS is used OFDM symbol on, 2 RE conducts that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used One group, use the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated described DM-RS；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, by correspondence 2 RE that the transmission DM-RS of same subcarrier number is used, as one group, upload often organizing RE Defeated DM-RS uses corresponding a length of of the described DM-RS antenna port of LTE system version 10 definition The time domain orthogonal frequency expansion sequence of 2 spreads, to transmit described DM-RS on this antenna port；Or,
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise DM-RS map that the transmission DM-RS on each OFDM of resource is used and on frequency domain Two adjacent RE, as one group, use LTE system version 10 to often organizing the DM-RS of transmission on RE Definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, To transmit described DM-RS on this antenna port.
49. base stations as described in any one of claim 43-46, it is characterised in that the transmission of described data is single Unit is used for: when using described method two, maps money according to the described DM-RS determined as follows Source, is mapped to DM-RS in present sub-frame and is transmitted:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, by front four In the individual OFDM symbol comprising the RE that transmission DM-RS is used, corresponding same subcarrier number 4 RE that transmission DM-RS is used are as one group, and latter four comprise what transmission DM-RS was used In the OFDM symbol of RE, 4 RE that the transmission DM-RS of corresponding same subcarrier number is used As one group；
The DM-RS of transmission in one of which RE is used the described DM-RS of LTE system version 10 definition Antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, to the upper transmission of RE of another group DM-RS use corresponding a length of of described DM-RS antenna port to LTE system version 10 definition The time domain orthogonal frequency expansion sequence that the time domain orthogonal frequency expansion sequence of 4 obtains after converting spreads, with at this Described DM-RS is transmitted on antenna port.
50. base stations as claimed in claim 49, it is characterised in that if in top n OFDM of present sub-frame The RE that transmission DM-RS is used is increased in two OFDM symbol in symbol, after the most described conversion To time domain orthogonal frequency expansion sequence be: the time domain orthogonal of a length of 4 defined by LTE system version 10 expands The time domain orthogonal spread spectrum obtained after the first two spreading factor of frequency sequence and latter two spreading factor exchange position Sequence；Or,
If increasing transmission in an OFDM symbol in the top n OFDM symbol of present sub-frame The RE that DM-RS is used, the time domain orthogonal frequency expansion sequence obtained after the most described conversion is: by LTE system Last spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of version 10 definition is as first Individual spreading factor, moves, after other spreading factor orders, the time domain orthogonal frequency expansion sequence obtained, or, by LTE First spreading factor in the time domain orthogonal frequency expansion sequence of a length of the 4 of system version 10 definition is as Later spreading factor, other spreading factors sequentially move forward the time domain orthogonal frequency expansion sequence obtained.
51. base stations as described in any one of claim 43-46, it is characterised in that the transmission of described data is single Unit is used for: when using described method two, maps money according to the described DM-RS determined as follows Source, is mapped to DM-RS in present sub-frame and is transmitted:
For extension CP, if two OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, by each two phase in the multiple OFDM symbol comprising the RE that transmission DM-RS is used In adjacent OFDM symbol, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used make It is one group, uses the described DM-RS of LTE system version 10 definition to often organizing the DM-RS of transmission on RE Antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, to upload at this antenna port Defeated described DM-RS；Or,
For extension CP, if an OFDM symbol in the top n OFDM symbol of present sub-frame Upper increasing transmits the RE that DM-RS is used, then each sky at DM-RS transmission place in present sub-frame On line cap, to transmitting DM-RS in the described DM-RS antenna port defined in LTE system version 10 The DM-RS of transmission on the RE used, spreads according to the mode of LTE system version 10 definition, To transmit described DM-RS on this antenna port；And,
Increase is had in the OFDM symbol of RE that transmission DM-RS used, on frequency domain immediate two 2 RE that individual transmission DM-RS is used are as one group, and often on group RE, the DM-RS of transmission uses LTE System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal spread spectrum sequence Row；Or, increase is had the OFDM symbol transmitting the RE that DM-RS is used and LTE system version Defined in 10 first comprises in the OFDM symbol of the RE that transmission DM-RS is used, corresponding same 2 RE of individual subcarrier number are as one group, and often on group RE, the DM-RS of transmission uses LTE system System version 10 definition described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence enter The time domain orthogonal frequency expansion sequence obtained after line translation spreads, described with transmission on this antenna port DM-RS。
52. base stations as claimed in claim 51, it is characterised in that the time domain obtained after described conversion is just Friendship frequency expansion sequence is:
In the time domain orthogonal frequency expansion sequence of a length of 2 that LTE system version 10 is defined two spread spectrums because of The time domain orthogonal frequency expansion sequence of a length of 2 obtained after sub-exchange position.
53. base stations as described in claim 45 or 46, it is characterised in that described data transmission unit is used In: when using described method three, map resource according to the described DM-RS determined as follows, DM-RS is mapped in present sub-frame and is transmitted:
For conventional CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In multiple OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 4 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 4 time domain orthogonal frequency expansion sequence spread, with Described DM-RS is transmitted on this antenna port.
54. base stations as described in claim 45 or 46, it is characterised in that described data transmission unit is used In: when using described method three, map resource according to the described DM-RS determined as follows, DM-RS is mapped in present sub-frame and is transmitted:
For extension CP, in present sub-frame on each antenna port at DM-RS transmission place, will comprise In each OFDM symbol of the RE that transmission DM-RS is used, corresponding two adjacent subcarrier number 2 RE as one group, use LTE system version 10 to define the DM-RS often organizing on RE transmission Described DM-RS antenna port corresponding a length of 2 time domain orthogonal frequency expansion sequence spread, with Described DM-RS is transmitted on this antenna port.
55. base stations as claimed in claim 43, it is characterised in that present sub-frame is conventional descending sub frame Or the special subframe of correspondence any one TDD special subframe configuration.
56. base stations as claimed in claim 55, it is characterised in that be conventional descending son at present sub-frame During frame, N is the positive integer less than 4；And/or,
When present sub-frame is special subframe, N is the positive integer less than 2 or the positive integer less than 3.
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