CN104009831A

CN104009831A - User special-purpose demodulation reference signal transmission and data demodulation methods and devices

Info

Publication number: CN104009831A
Application number: CN201310057622.3A
Authority: CN
Inventors: 高雪娟; 林亚男; 沈祖康
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-02-22
Filing date: 2013-02-22
Publication date: 2014-08-27
Anticipated expiration: 2033-02-22
Also published as: CN104009831B

Abstract

The embodiment of the invention discloses user special-purpose demodulation reference signal (DM-RS) transmission and data demodulation methods and devices and relates to the field of radio communication so as to improve a resource utilization rate. In the methods and devices, DM-RSs are transmitted on REs on one or two OFDM signs different with an OFDM sign, on which synchronous signal transmission is carried out, in first N OFDM signs of a subframe so that a problem of overlapping of DM-RS mapping resources and synchronous-signal mapping resources is prevented and thus a problem that in a synchronous-signal transmitting subframe, part of PRBs in a system bandwidth are incapable of transmitting downlink data is prevented. Therefore, the resource utilization rate is improved.

Description

The transmission of user's dedicated demodulation reference signal and data demodulation method and equipment

Technical field

The present invention relates to wireless communication field, relate in particular to the transmission of a kind of user's dedicated demodulation reference signal and data demodulation method and equipment.

Background technology

In order to reduce overhead, improve resource utilization, strengthen (Long Term Evolution-Advance, LTE-A) system version-11(Release11 at Long Term Evolution, Rel-11) in, defined a kind of new carrier type (New Carrier Type, NCT).On NCT, there is not tradition (legacy) control area, downlink data can be in a subframe all OFDMs (Orthogonal Frequency Division Multiplexing, OFDM) on symbol, transmit, and based on subscriber equipment (User Equipment, UE) special demodulated reference signal (DeModulation Reference Signal, DM-RS) carries out demodulation; And in order to improve the resource utilization of NCT, need be supported in the downlink data that transmits DM-RS simultaneously and carry out demodulation based on DM-RS in the Physical Resource Block (Physical Resource Block, PRB) at synchronous transmission of signal place.

On Legacy carrier wave, (being non-NCT carrier wave), is divided into control area and data area two parts by the OFDM symbol in a descending sub frame, the top n OFDM symbol that control area is this descending sub frame, as shown in Figure 1.Wherein, the possible value of N is 1,2,3,4, and N=4 is only applicable to the carrier wave that system bandwidth is 1.4MHz, and for time division duplex (Time Division Duplex, TDD) special subframe, N only can value 1 or 2.

Synchronizing signal comprises master sync signal (Primary Synchronized Signal, PSS) and auxiliary synchronous signals (Secondary Synchronization Signal, SSS).At frequency domain, PSS and SSS are only mapped on 72 subcarriers in the middle of bandwidth.In time domain, for Frequency Division Duplexing (FDD) (Frequency Division Duplex, FDD) system, PSS is mapped to first time slot that time slot 0(is subframe 0) and time slot 10(be first time slot of subframe 5) last OFDM symbol on, SSS is mapped on the penultimate OFDM symbol of time slot 0 and time slot 10, as shown in Figure 2 a; For TDD system, PSS is mapped on the 3rd OFDM symbol in subframe 1 and 6 that (, in the TDD up/down row configuration of 5ms up-downgoing switching point, subframe 1 and 6 is all special subframe; In the TDD up/down row configuration of 10ms up-downgoing switching point, only subframe 1 is special subframe; For special subframe, be that PSS is mapped in descending pilot frequency time slot (the Downlink Pilot Time Slot comprising in special subframe, DwPTS) on the 3rd OFDM symbol), SSS is mapped to second time slot that time slot 1(is subframe 0) and time slot 11(be second time slot of subframe 5) last OFDM symbol on, as shown in Figure 2 b.

The special DM-RS of UE can support 1 ~ 8 antenna port transmission.DM-RS is only upper transmission of the PRB at Physical Downlink Shared Channel (hysical Downlink Shared Channel, PDSCH) transmission place, to reduce reference symbol expense, save energy, to reduce the interference between neighbor cell.Fig. 3 a(regular circulation prefix (Cyclic Prefix, CP) under) and Fig. 3 b(expansion CP under) be depicted as the resource mapping method of DM-RS taking a PRB pair as unit, wherein, the mapping resource of DM-RS on antenna port 7/8/11/13 is identical, mapping resource on antenna port 9/10/12/14 is identical, ensures the orthogonality between the DM-RS of the antenna port that uses same map resource by the time domain orthogonal sequence in table 1 and table 2.Under expansion CP, DM-RS only supports 2 antenna ports.In addition be that (be under descending conventional CP, DwPTS is 6592T for the special subframe of 3 OFDM symbols for DwPTS length in TDD system, _sspecial subframe, under descending expansion CP, DwPTS is 7680T _sspecial subframe, wherein T _sfor system adopts the time interval), i.e. when the special subframe of corresponding special subframe configuration 0 and 5 when conventional CP, and expansion CP, the special subframe of corresponding special subframe configuration 0 and 4, does not support DM-RS transmission.

Table 1: under conventional CP, the DM-RS orthogonal sequence of different antennae port

Table 2: under expansion CP, the DM-RS orthogonal sequence of different antennae port

According to above-mentioned DM-RS and synchronizing signal mapping position, when (being subframe 0 and 5 for FDD in the subframe at synchronous transmission of signal place, be subframe 0,1,5,6 for TDD), the mapping resource of the special DM-RS of UE and the mapping resource of synchronizing signal exist overlapping, therefore, in these subframes, the PRB that has a synchronizing signal mapping resource to (pair) in (being in 6 PRB in the middle of system bandwidth) do not transmit DM-RS and the downlink data based on DM-RS demodulation.

In order further to improve resource utilization ratio, Long Term Evolution strengthens (Long Term Evolution-Advance, LTE-A) system version-12(Release11, Rel-12) determine and introduce new carrier type (New Carrier Type, NCT), to strengthen system spectrum utilance, better support heterogeneous network, to reduce power consumption.At present on NCT: do not have legacy control area, PDSCH can transmit on all OFDM symbols in a descending sub frame, for TDD special subframe, can transmit on all OFDM symbols for downlink transfer, NCT is upper only supports at present the downlink transfer of carrying out demodulation based on the special DM-RS of UE, owing to there not being legacy control area, there is not original physical down channel in control area transmission on legacy carrier wave yet, as legacy Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) etc., the PDSCH on NCT can only go up by NCT enhancing Physical Downlink Control Channel (the Enhanced Physical Downlink Control CHannel of transmission, E-PDCCH) dispatch, or also can be by carrying out carrier aggregation (Carrier Aggregation with NCT, CA) PDCCH/E-PDCCH transmitting on legacy carrier wave carries out across carrier dispatching, wherein the downlink transfer such as PDSCH and E-PDCCH on NCT all need to be carried out demodulation based on the special DM-RS of UE, the main distinction of E-PDCCH and legacy PDCCH is, E-PDCCH and the transmission of PDSCH frequency division multiplexing, and therefore, the E-PDCCH on NCT also can transmit on the OFDM of be useful on downlink transfer symbol, and its transmission structure is as shown in Figure 4, in addition, it is upper taking 5ms as the exclusive pilot signal in periodic transfer community (Cell-specific reference signals, CRS) that NCT is only supported in single antenna port (antenna port p=0) at present, and CRS is only for measuring and following the tracks of, and is not used in demodulation.

NCT can be divided into synchronous NCT and asynchronous NCT; For synchronous NCT, can not work alone, need to work with legacy carrier aggregation, think that the synchronizing information of NCT and the legacy carrier wave of polymerization are consistent, synchronizing information can be obtained from legacy carrier wave, can certainly obtain according to detect the synchronizing signal sending on NCT; For asynchronous NCT, need to obtain synchronously by detect the synchronizing signal sending on NCT; At least for asynchronous NCT, on it, need to exist synchronous transmission of signal.

To sum up,, in synchronous transmission of signal subframe, all there is the overlapping problem of DM-RS mapping resource and synchronizing signal mapping subframe in the resource mapping method of the special DM-RS of UE defining in Rel-10.If according to the special DM-RS resource mapping method of the UE of Rel-10, in synchronous transmission of signal subframe, can not transmitting downlink data in 6 PRB in the middle of the system bandwidth of NCT, reduce the resource utilization of NCT.

Summary of the invention

The embodiment of the present invention provides the transmission of a kind of user's dedicated demodulation reference signal and data demodulation method and equipment, for improving resource utilization.

A kind of user's dedicated demodulation reference signal DM-RS transmission method, the method comprises:

Network side is determined in current subframe for transmitting the physical resource of DM-RS;

Network side is according to the DM-RS resource mapping method of each DM-RS antenna port, respectively DM-RS corresponding to each DM-RS antenna port in current subframe is mapped to this DM-RS antenna port described for transmitting DM-RS Resource Unit RE corresponding on the physical resource of DM-RS, DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n orthogonal frequency division multiplex OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 integer;

Network side in this subframe for transmitting the physical resource of DM-RS, by sending the DM-RS after resource mapping for the antenna port that transmits DM-RS to terminal in this subframe.

A kind of data demodulation method, the method comprises:

Terminal is determined the physical resource for transmission user dedicated demodulation reference signal DM-RS in current subframe;

Terminal is according to the DM-RS resource mapping method of each DM-RS antenna port, each DM-RS antenna port in current subframe obtains for transmitting on the corresponding DM-RS Resource Unit RE on the physical resource of DM-RS the DM-RS that this DM-RS antenna port is corresponding described respectively, and DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n orthogonal frequency division multiplex OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 and be not more than 6 integer;

Terminal, according to DM-RS corresponding to each DM-RS antenna port, is carried out demodulation to the downlink data receiving on respective antenna port.

A kind of base station, this base station comprises:

Transfer resource determining unit, for determining that current subframe is for transmitting the physical resource of DM-RS;

DM-RS map unit, be used for according to the DM-RS resource mapping method of each DM-RS antenna port, respectively DM-RS corresponding to each DM-RS antenna port in current subframe is mapped to this DM-RS antenna port described for transmitting DM-RS Resource Unit RE corresponding on the physical resource of DM-RS, DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n orthogonal frequency division multiplex OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 integer;

Transmission unit, in this subframe for transmitting the physical resource of DM-RS, by sending the DM-RS after resource mapping for the antenna port that transmits DM-RS to terminal in this subframe.

A kind of terminal, this terminal comprises:

DM-RS acquiring unit, be used for according to the DM-RS resource mapping method of each DM-RS antenna port, each DM-RS antenna port in current subframe obtains for transmitting on the corresponding DM-RS Resource Unit RE on the physical resource of DM-RS the DM-RS that this DM-RS antenna port is corresponding described respectively, and DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n orthogonal frequency division multiplex OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 and be not more than 6 integer;

Demodulating unit, for according to DM-RS corresponding to each DM-RS antenna port, carries out demodulation to the downlink data receiving on respective antenna port.

In the scheme that the embodiment of the present invention provides, network side is determined in current subframe for transmitting the physical resource of DM-RS, according to the DM-RS resource mapping method of each DM-RS antenna port, respectively DM-RS corresponding to each DM-RS antenna port in current subframe is mapped to the DM-RS RE of this DM-RS antenna port correspondence on the physical resource for transmitting DM-RS, and in this subframe for transmitting the physical resource of DM-RS, by sending the DM-RS after resource mapping for the antenna port that transmits DM-RS to terminal in this subframe; Terminal is determined the physical resource for transmission user dedicated demodulation reference signal DM-RS in current subframe, according to the DM-RS resource mapping method of each DM-RS antenna port, on the corresponding DM-RS RE of each DM-RS antenna port in current subframe on the physical resource for transmitting DM-RS, obtain the DM-RS that this DM-RS antenna port is corresponding respectively, and according to DM-RS corresponding to each DM-RS antenna port, the downlink data receiving on respective antenna port is carried out to demodulation.Wherein, the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from the top n OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol, thereby avoid the overlapping problem of DM-RS mapping resource and synchronizing signal mapping resource, and then avoid in synchronous transmission of signal subframe, problem that can not transmitting downlink data in 6 PRB in the middle of the system bandwidth, thus resource utilization improved.

Brief description of the drawings

Fig. 1 is the multiplexing schematic diagram that is related to of carrier Control of the prior art region and data area;

Fig. 2 a is the synchronizing signal mapping position schematic diagram in FDD system in prior art;

Fig. 2 b is the synchronizing signal mapping position schematic diagram in TDD system in prior art;

Fig. 3 a is the DM-RS resource mapping method schematic diagram under conventional CP in prior art;

Fig. 3 b is the DM-RS resource mapping method schematic diagram of expanding in prior art under CP;

Fig. 4 is the multiplexing schematic diagram that is related to of control area and the data area of NCT of the prior art;

The method flow schematic diagram that Fig. 5 provides for the embodiment of the present invention;

The other method schematic flow sheet that Fig. 6 provides for the embodiment of the present invention;

Fig. 7 a-Fig. 7 e is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=6,8 antenna port;

Fig. 8 a-Fig. 8 d is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=4,8 antenna port;

Fig. 9 a-Fig. 9 b is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=4,8 antenna port;

Figure 10 a-Figure 10 b is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=4,8 antenna port;

Figure 11 a-Figure 11 d is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=2,8 antenna port;

Figure 12 a-Figure 12 d is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=2,8 antenna port;

Figure 13 a-Figure 13 d is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=3,8 antenna port;

Figure 14 a-Figure 14 d is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=2,8 antenna port;

Figure 15 a-Figure 15 b is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=2,8 antenna port;

Figure 16 a-Figure 16 d is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=3,4 antenna port;

Figure 17 a is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=4,4 antenna port;

Figure 17 b is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=6,4 antenna port;

Figure 18 a-Figure 18 c is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=4,2 antenna port;

Figure 19 a-Figure 19 b is in the embodiment of the present invention under conventional CP, DM-RS resource mapping method schematic diagram when A=6,2 antenna port;

The architecture of base station schematic diagram that Figure 20 provides for the embodiment of the present invention;

The terminal structure schematic diagram that Figure 21 provides for the embodiment of the present invention.

Embodiment

In order to improve resource utilization, the embodiment of the present invention provides the data demodulation method of the special DM-RS transmission method of a kind of user and the special DM-RS of a kind of user.

Referring to Fig. 5, the special DM-RS transmission method of user that the embodiment of the present invention provides, comprises the following steps:

Step 50: network side is determined in current subframe for transmitting the physical resource of DM-RS; Here, this physical resource is embodied in Physical Resource Block to (PRB pair), i.e. the physical resource of network side configuration or dispatch terminal downlink data receiving, and this downlink data comprises the downlink data of the channel bearing such as PDSCH and E-PDCCH;

Step 51: network side is according to the DM-RS resource mapping method of each DM-RS antenna port, respectively DM-RS corresponding to each DM-RS antenna port in current subframe is mapped to this DM-RS antenna port corresponding DM-RS Resource Unit (RE) on the physical resource for transmitting DM-RS, the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from top n OFDM (OFDM) symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 integer;

Step 52: network side in this subframe for transmitting the physical resource of DM-RS, by sending the DM-RS after resource mapping for the antenna port that transmits DM-RS to terminal in this subframe.

Concrete, for regular circulation prefix (CP), the maximum occurrences of N is 6; For expansion CP, the maximum occurrences of N is 5; Or for conventional CP and expansion CP, the maximum occurrences of N is 3.

Concrete, in time division duplex (TDD) system, the subframe of transmission DM-RS is the special subframe of corresponding special subframe configuration 9 under conventional CP, or for expanding the special subframe of corresponding special subframe configuration 7 under CP; Or the subframe of transmission DM-RS is the descending sub frame in Frequency Division Duplexing (FDD) (FDD) system; Or in TDD system, the subframe of transmission DM-RS is the special subframe of corresponding other special subframe configurations except special subframe configuration 9 under conventional CP, or it is the special subframe of corresponding other special subframe configurations except special subframe configuration 7 under expansion CP; Or in TDD system, the subframe of transmission DM-RS is the special subframe of corresponding arbitrary special subframe configuration under conventional CP, or for expanding the special subframe of corresponding arbitrary special subframe configuration under CP.

Further, if the subframe of transmission DM-RS is synchronous transmission of signal subframe, on the 3rd the OFDM symbol of synchronizing signal in this subframe, transmit.This synchronizing signal can be master sync signal (PSS).

Concrete, when the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, these two OFDM symbols are continuous or discrete OFDM symbol; Preferably, in the time that these two OFDM symbols are continuous OFDM symbol, these two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in current subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in current subframe, or be the 5th OFDM symbol and the 6th OFDM symbol in current subframe; In the time that these two OFDM symbols are discrete OFDM symbol, these two OFDM symbols are the 2nd OFDM symbol and the 4th the OFDM symbol in current subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in current subframe, or be any two discontinuous OFDM symbols in the 1st, 2,4,5,6 OFDM symbols in current subframe;

Or,

When the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from the top n OFDM symbol in this subframe on an OFDM symbol of synchronous transmission of signal place OFDM symbol, this OFDM symbol is any one OFDM symbol except the OFDM symbol of synchronous transmission of signal place in described top n OFDM symbol.Preferably, this OFDM symbol is any one in the 1st OFDM symbol in current subframe, the 2nd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol.In the time that under expansion CP, N maximum is no more than 5, the situation that comprises the 6th OFDM symbol is only applicable to conventional CP, and the situation that does not comprise the 6th OFDM symbol is applicable to expand CP.

Concrete, the DM-RS RE that each DM-RS antenna port is corresponding, it is the corresponding PRB pair set of physical resource for transmitting DM-RS, corresponding RE on one or two OFDM symbol that comprise A different subcarrier of numbering of each PRB pair is mapped at DM-RS, wherein A is greater than 1 and be less than 12 integer.

Concrete, in the time supporting maximum 8 DM-RS antenna ports, the DM-RS RE that each DM-RS antenna port is corresponding determines as follows:

8 DM-RS antenna ports are divided into 2 groups, and each grouping comprises 4 DM-RS antenna ports, DM-RS RE corresponding to 4 DM-RS antenna ports in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; The DM-RS RE of the DM-RS antenna port correspondence in each PRB pair using the RE of A subcarrier definite in each PRB pair correspondence on described one or two OFDM symbol in correspondence grouping; Or,

8 DM-RS antenna ports are divided into 4 groups, and each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS antenna ports in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; The DM-RS RE of the DM-RS antenna port correspondence in each PRB pair using the RE of A subcarrier definite in each PRB pair correspondence on described one or two OFDM symbol in correspondence grouping.

Concrete, above-mentioned 8 DM-RS antenna ports are divided into 2 groups, each grouping comprises 4 DM-RS antenna ports, DM-RSRE corresponding to 4 DM-RS antenna ports in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; The DM-RS RE of the DM-RS antenna port correspondence in each PRB pair using the RE of A subcarrier definite in each PRB pair correspondence on described one or two OFDM symbol in correspondence grouping, specifically can comprise following three examples:

Example 1:

While being mapped to two OFDM symbols as A=6 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping is according to the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; As shown in Fig. 7 a-Fig. 7 e;

Example 2:

While being mapped to one or two OFDM symbol as A=4 and by DM-RS, definite mode of DM-RS RE comprises that following method 1 is to one in method 5:

DM-RS RE corresponding to DM-RS antenna port in 1: one grouping of method is according to subcarrier number order from low to high corresponding 12-b-a, 12-b+1-a, 12-b and 12-b+1 RE on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding b, b+1, b+a and b+1+a RE on described one or two OFDM symbol in described each PRB pair; Wherein, in the time of b=1, a=8 or 7 or 6 or 4 or 3 or 2, in the time of b=2, a=6 or 5 or 3 or 2, in the time of b=3, a=4 or 2;

In the method, be mapped to the situation of two OFDM symbols for A=4, DM-RS, b=1, corresponding diagram 8a-Fig. 8 d when a=8;

For A=4, DM-RS is mapped to the situation of an OFDM symbol, works as b=3, corresponding diagram 9a-Fig. 9 b when a=2;

For A=4, DM-RS is mapped to the situation of an OFDM symbol, works as b=1, corresponding diagram 10a-Figure 10 b when a=8.

When b=1, specifically describe as follows:

DM-RS RE corresponding to antenna port of transmission DM-RS in a grouping is according to subcarrier number order from low to high corresponding 12-a, 11-a, the 11st and the 12nd RE on described two OFDM symbols in a described PRB pair; DM-RS RE corresponding to antenna port of transmission DM-RS in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 2nd, 1+a and 2+a RE on described two OFDM symbols in a described PRB pair; Wherein, a=8 or 7 or 6 or 4 or 3 or 2;

When b=2, specifically describe and be:

DM-RS RE corresponding to antenna port of transmission DM-RS in a grouping is according to subcarrier number order from low to high corresponding 10-a, 11-a, the 10th and the 11st RE on described two OFDM symbols in a described PRB pair; DM-RS RE corresponding to antenna port of transmission DM-RS in another grouping is according to subcarrier number order from low to high corresponding the 2nd, the 3rd, 2+a and 3+a RE on described two OFDM symbols in a described PRB pair; Wherein, a=6 or 5 or 3 or 2;

When b=3, specifically describe and be:

DM-RS RE corresponding to antenna port of transmission DM-RS in a grouping is according to subcarrier number order from low to high corresponding 9-a, 10-a, the 9th and the 10th RE on described two OFDM symbols in a described PRB pair; DM-RS RE corresponding to antenna port of transmission DM-RS in another grouping is according to subcarrier number order from low to high corresponding the 3rd, the 4th, 3+a and 4+a RE on described two OFDM symbols in a described PRB pair; Wherein, a=4 or 2.

DM-RS RE corresponding to DM-RS antenna port in 2: one groupings of method is according to the 5th, the 6th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number corresponding the 3rd, the 4th, the 9th and the 10th RE on described one or two OFDM symbol from low to high in described each PRB pair, or, be according to the 2nd, the 3rd, the 8th and the 9th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair;

Method 3: taking in described each PRB pair according to subcarrier number order from low to high on described one or two OFDM symbol corresponding the 1st, the 4th, the 7th and the 10th RE as one group of DM-RS RE, the 3rd, the 6th, the 9th and the 12nd RE are one group of DM-RS RE, the 2nd, the 5th, the 8th and the 11st RE are one group of DM-RS RE, and DM-RS RE corresponding to DM-RS antenna port in a grouping is a group in described 3 groups of DM-RS RE; DM-RS RE corresponding to DM-RS antenna port in another grouping is another group in described 3 groups of DM-RS RE;

DM-RS RE corresponding to DM-RS antenna port in 4: one groupings of method is according to subcarrier number order from low to high corresponding 12-b-c+1-a, 12-b+1-a, 12-b-c+1 and 12-b+1 RE on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding b, b+c, b+a and b+c+a RE on described one or two OFDM symbol in described each PRB pair; Wherein, b=1, c=3, a=6, or, b=1, c=2, a=4, or b=2, c=2, a=4;

DM-RS RE corresponding to DM-RS antenna port in 5: one groupings of method is according to the 2nd, the 5th, the 8th and the 11st RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 1st, the 4th, the 7th and the 10th RE on described one or two OFDM symbol, or in described each PRB pair according to subcarrier number order from low to high corresponding the 3rd, the 6th, the 9th and the 12nd RE on described one or two OFDM symbol;

Example 3:

While being mapped to two OFDM symbols as A=2 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping is according to 12-b+1-a of subcarrier number order from low to high correspondence on described two OFDM symbols and 12-b+1 RE in described each PRB pair, DM-RS RE corresponding to DM-RS antenna port in another grouping is according to b of subcarrier number order from low to high correspondence on described two OFDM symbols and b+a RE in described each PRB pair, wherein, in the time of b=1, a 1 to 10 comprises that 1 and 10 at interior arbitrary integer (corresponding b=1 of Figure 11 a-Figure 11 d, the situation of a=8), in the time of b=2, a 1 to 10 comprises that 1 and 10 at the interior arbitrary integer except 9 (the corresponding b=2 of Figure 12 a-Figure 12 d, the situation of a=8), in the time of b=3, a 1 to 9 comprises that 1 and 9 at the interior arbitrary integer except 7, in the time of b=4, a 1 to 8 comprises that 1 and 8 at the interior arbitrary integer except 5, in the time of b=5, a 1 to 7 comprises that 1 and 7 at the interior arbitrary integer except 3.

For example, for the resource mapping method (the concrete resource mapping method providing in example 1-example 3) of above-mentioned 8 ports, network side in this subframe for transmitting the physical resource of DM-RS, by in this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal, need to carry out the spread spectrum operation of following DM-RS:

When A is not 4 integral multiple and DM-RS while being mapped in two OFDM symbols: for each DM-RS antenna port, using on this DM-RS antenna port on described two OFDM symbols 4 DM-RS on adjacent or nearest two subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing; Or,

In the time of integral multiple that A is 4: for each DM-RS antenna port, using on this DM-RS antenna port on each OFDM symbol that is mapped with DM-RS 4 DM-RS on adjacent or nearest 4 subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing.

The specific descriptions of above-mentioned spread processing are as follows:

In the time that A=6 and DM-RS are mapped to two OFDM symbols:

For the antenna port of each transmission DM-RS, using on this antenna port on described two OFDM symbols 4 DM-RS on adjacent or nearest two subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing;

In the time that A=4 and DM-RS are mapped to two OFDM symbols:

For each DM-RS antenna port, using on this antenna port on described two OFDM symbols 4 DM-RS on adjacent or nearest two subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing; Or,

For each DM-RS antenna port, using 4 DM-RS on each OFDM symbol that is mapped with DM-RS on this antenna port as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing;

In the time that A=4 and DM-RS are mapped to an OFDM symbol:

For each DM-RS antenna port, be one group by 4 DM-RS on the OFDM symbol that is mapped with DM-RS on this antenna port, and use the orthogonal sequence that length that this antenna port is corresponding is 4 to carry out spread processing to this group DM-RS;

In the time that A=2 and DM-RS are mapped to two OFDM symbols:

For each DM-RS antenna port, using 4 DM-RS on described two OFDM symbols on this antenna port as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 to carry out spread processing to this group DM-RS.

Concrete, above-mentioned 8 DM-RS antenna ports are divided into 4 groups, each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS days lower port in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; A subcarrier definite in each PRB pair corresponding RE DM-RS antenna port in correspondence grouping on described one or two OFDM symbol when corresponding DM-RS RE, specifically can be comprised to following two kinds of examples in each PRB pair:

Example 1:

While being mapped to two OFDM symbols as A=3 and by DM-RS:

DM-RS RE corresponding to DM-RS antenna port in first grouping is according to the 4th, the 8th and the 12nd RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair;

DM-RS RE corresponding to DM-RS antenna port in second grouping is according to the 1st, the 5th and the 9th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair;

DM-RS RE corresponding to DM-RS antenna port in the 3rd grouping is according to the 3rd, the 7th and the 11st RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair;

DM-RS RE corresponding to DM-RS antenna port in the 4th grouping is according to the 2nd, the 6th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair;

Example 2:

While being mapped to one or two OFDM symbol as A=2 and by DM-RS, comprise that following method 1 is to one in method 3:

Method 1: using in described each PRB pair according to subcarrier number order from low to high on described one or two OFDM symbol corresponding b and b+a RE as one group, obtain (12-a) group RE, wherein, a 2 to 8 comprises that 2 and 8 at interior arbitrary integer, and b 1 comprises 1 and (12-a) at interior arbitrary integer to (12-a); DM-RS RE corresponding to DM-RS antenna port in first, second, third and fourth grouping is respectively one group of RE in described (12-a) group RE, and the described RE group of each grouping correspondence is different;

That is:

When a=8, b=1 ~ 4, obtain 4 groups of RE, be respectively in a PRB pair according to subcarrier number order from low to high corresponding the 1st and the 9th RE, the 2nd and the 10th RE, the 3rd and the 11st RE, the 4th and the 12nd RE, i.e. corresponding diagram 14a-Figure 14 d on described one or two OFDM symbol;

When a=7, b=1 ~ 5, obtain 5 groups of RE, be respectively in a PRB pair according to the 1st and the 8th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 2nd and the 9th RE, the the 3rd and the 10th RE, the the 4th and the 11st RE, the the 5th and the 12nd RE, wherein one group of RE in the corresponding above-mentioned RE group of each grouping difference in 4 DM-RS antenna port groupings, preferably, 4 DM-RS antenna port groups are distinguished in corresponding PRB pair according to the 1st and the 8th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 5th and the 12nd RE, the the 4th and the 11st RE, the the 2nd and the 9th RE,

When a=6, b=1 ~ 6, obtain 6 groups of RE, are respectively in a PRB pair according to the 1st and the 7th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 2nd and the 8th RE, the the 3rd and the 9th RE, the the 4th and the 10th RE, the the 5th and the 11st RE, the the 6th and the 12nd RE, wherein one group of RE in the corresponding above-mentioned RE group of each grouping difference in 4 DM-RS antenna port groupings, preferably, 4 DM-RS antenna port groups are distinguished in corresponding PRB pair according to the 1st and the 7th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 6th and the 12nd RE, the the 2nd and the 8th RE, the the 5th and the 11st RE, or distinguish in a corresponding PRB pair according to the 1st and the 7th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 6th and the 12nd RE, the the 3rd and the 9th RE, the the 4th and the 10th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 8th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 5th and the 11st RE, the the 3rd and the 9th RE, the the 4th and the 10th RE,

When a=5, b=1 ~ 7, obtain 7 groups of RE, be respectively in a PRB pair according to the 1st and the 6th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 2nd and the 7th RE, the the 3rd and the 8th RE, the the 4th and the 9th RE, the the 5th and the 10th RE, the the 6th and the 11st RE, the the 7th and the 12nd, wherein one group of RE in the corresponding above-mentioned RE group of each grouping difference in 4 DM-RS antenna port groupings, preferably, 4 DM-RS antenna port groups are distinguished in corresponding PRB pair according to the 1st and the 6th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 7th and the 12nd RE, the the 3rd and the 8th RE, the the 5th and the 10th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 7th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 6th and the 11st RE, the the 3rd and the 8th RE, the the 5th and the 10th RE,

When a=4, b=1 ~ 8, obtain 8 groups of RE, are respectively in a PRB pair according to the 1st and the 5th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 2nd and the 6th RE, the the 3rd and the 7th RE, the the 4th and the 8th RE, the the 5th and the 9th R, the the 6th and the 10th RE, the the 7th and the 11st RE, the the 8th and the 12nd RE, wherein one group of RE in the corresponding above-mentioned RE group of each grouping difference in 4 DM-RS antenna port groupings, preferably, 4 DM-RS antenna port groups are distinguished in corresponding PRB pair according to the 1st and the 5th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 8th and the 12nd RE, the the 2nd and the 6th RE, the the 7th and the 11st RE, or distinguish in a corresponding PRB pair according to the 1st and the 5th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 8th and the 12nd RE, the the 3rd and the 7th RE, the the 6th and the 10th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 6th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 7th and the 11st RE, the the 4th and the 8th RE, the the 5th and the 9th RE, or distinguish in a corresponding PRB pair according to the 3rd and the 7th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 6th and the 10th RE, the the 4th and the 8th RE, the the 5th and the 9th RE,

When a=3, b=1 ~ 9, obtain 9 groups of RE, are respectively in a PRB pair according to the 1st and the 4th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 2nd and the 5th RE, the the 3rd and the 6th RE, the the 4th and the 7th RE, the the 5th and the 8th RE, the the 6th and the 9th RE, the the 7th and the 10th RE, the the 8th and the 11st RE, the the 9th and the 12nd RE, wherein one group of RE in the corresponding above-mentioned RE group of each grouping difference in 4 DM-RS antenna port groupings, preferably, 4 DM-RS antenna port groups are distinguished in corresponding PRB pair according to the 1st and the 4th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 9th and the 12nd RE, the the 2nd and the 5th RE, the the 8th and the 11st RE, or distinguish in a corresponding PRB pair according to the 1st and the 4th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 9th and the 12nd RE, the the 3rd and the 6th RE, the the 7th and the 10th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 5th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 8th and the 11st RE, the the 3rd and the 6th RE, the the 3rd and the 10th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 5th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 8th and the 11st RE, the the 4th and the 7th RE, the the 6th and the 9th RE,

When a=2, b=1 ~ 10, obtain 10 groups of RE, are respectively in a PRB pair according to the 1st and the 3rd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 2nd and the 4th RE, the the 3rd and the 5th RE, the the 4th and the 6th RE, the the 5th and the 7th RE, the the 6th and the 8th RE, the the 7th and the 9th RE, the the 8th and the 10th RE, the the 9th and the 11st RE, the the 10th and the 12nd RE, wherein one group of RE in the corresponding above-mentioned RE group of each grouping difference in 4 DM-RS antenna port groupings, preferably, 4 DM-RS antenna port groups are distinguished in corresponding PRB pair according to the 1st and the 3rd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 10th and the 12nd RE, the the 2nd and the 4th RE, the the 9th and the 11st RE, or distinguish in a corresponding PRB pair according to the 1st and the 3rd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 10th and the 12nd RE, the the 4th and the 6th RE, the the 7th and the 9th RE, or distinguish in a corresponding PRB pair according to the 1st and the 3rd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 10th and the 12nd RE, the the 5th and the 7th RE, the the 6th and the 8th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 4th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 9th and the 11st RE, the the 3rd and the 5th RE, the the 8th and the 10th RE, or distinguish in a corresponding PRB pair according to the 2nd and the 4th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 9th and the 11st RE, the the 5th and the 7th RE, the the 6th and the 8th RE, or distinguish in a corresponding PRB pair according to the 3rd and the 5th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol, the the 8th and the 10th RE, the the 4th and the 6th RE, the the 7th and the 9th RE,

Method 2: DM-RS RE corresponding to DM-RS antenna port in first grouping is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in second grouping is according to 12-b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and 12-b+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in the 3rd grouping is according to b+a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1+a RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in the 4th grouping is according to 12-b-a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and 12-b+1-a RE in described each PRB pair; Wherein, b=1, a=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2(corresponding diagram 15a-Figure 15 is b);

Method 3: DM-RS RE corresponding to DM-RS antenna port in first grouping is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in second grouping is according to b+a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+a+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in the 3rd grouping is according to b+2a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+2a+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in the 4th grouping is according to b+3a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+3a+1 RE in described each PRB pair; Wherein, a=2, b 1 to 5 comprises that 1 and 5 at interior arbitrary integer, or, a=3, b=1 or 2.

Concrete, in the time supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS antenna ports in same grouping, and determine as follows DM-RS RE corresponding to each DM-RS antenna port:

When A=3(corresponding diagram 16a-Figure 16 is d) and while being mapped to two OFDM symbols by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 2nd, the 7th and the 12nd RE on described two OFDM symbols, DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 6th and the 11st RE on described two OFDM symbols in described each PRB pair; Or,

As A=4(corresponding diagram 17a) and when DM-RS is mapped to an OFDM symbol: DM-RS RE corresponding to DM-RS antenna port in a grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 3rd, the 4th, the 11st and the 12nd RE on described two OFDM symbols, DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 2nd, the 9th and the 10th RE on described two OFDM symbols in described each PRB pair; Or,

As A=6(corresponding diagram 17b) and while DM-RS being mapped to one or two OFDM symbol: DM-RS RE corresponding to DM-RS antenna port in a grouping is according to subcarrier number order from low to high corresponding the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair.

Concrete, in the time supporting maximum 2 DM-RS antenna ports (this situation is generally under expansion CP), the DM-RS RE that each DM-RS antenna port is corresponding is identical, and determines DM-RS RE corresponding to each DM-RS antenna port as follows:

Be mapped to one or two OFDM symbol during as A=2 and by DM-RS: the DM-RS RE that each DM-RS antenna port is corresponding is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+a RE in described each PRB pair, wherein, a 1 to 11 comprises that 1 and 11 at interior arbitrary integer, and b 1 comprises 1 and (12-a) at interior arbitrary integer to (12-a); Or,

While being mapped to two OFDM symbols as A=3 and by DM-RS: the DM-RS RE that each DM-RS antenna port is corresponding be in described each PRB pair according to subcarrier number order from low to high corresponding the 2nd, the 7th and the 12nd RE on described two OFDM symbols, or DM-RS RE corresponding to each DM-RS antenna port is according to subcarrier number order from low to high corresponding the 1st, the 6th and the 11st RE on described two OFDM symbols in described each PRB pair; Or,

Be mapped to one or two OFDM symbol during as A=4 and by DM-RS: the DM-RS RE that each DM-RS antenna port is corresponding is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair, b+a, b+2a and b+3a RE, wherein, a=1, b is 1 to 9 arbitrary integer (b=2 including 1 and 9, a=3, when DM-RS is mapped to two OFDM symbols, corresponding diagram 18a-Figure 18 c), or a=2, b is 1 to 6 arbitrary integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4, or, the DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+1, b+a and b+1+a RE on described one or two OFDM symbol in described each PRB pair, wherein, a is 3 to 10 arbitrary integers including 3 and 10, be 1 to (11-a) including 1 and (11-a) arbitrary integer (a=10, b=1, when DM-RS is mapped to an OFDM symbol, corresponding diagram 19a), or,

Be mapped to one or two OFDM symbol during as A=6 and by DM-RS: the DM-RS RE that each DM-RS antenna port is corresponding is according to the 2nd, the 3rd, the 6th, the 7th, the 10th and the 11st RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair.

For above-mentioned, 8 DM-RS antenna ports are divided into two examples of 4 groups and support the situation of maximum 4 and 2 DM-RS antenna ports, network side in this subframe for transmitting the physical resource of DM-RS, by in this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal, need to carry out the spread processing of following DM-RS:

In the time that DM-RS is mapped to two OFDM symbols: for each DM-RS antenna port, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to every group of DM-RS; Or,

In the time of integral multiple that A is 2: for each DM-RS antenna port, using 2 DM-RS on the described OFDM symbol that is mapped with DM-RS on this antenna port as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS.

The above-mentioned specific descriptions to spread processing are as follows:

For above-mentioned two examples that 8 DM-RS antenna ports are divided into 4 groups:

While being mapped to two OFDM symbols as A=3 and by DM-RS: for each DM-RS antenna port, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to every group of DM-RS;

While being mapped to an OFDM symbol as A=2 and by DM-RS: for each DM-RS antenna port, using 2 DM-RS on a described OFDM symbol on this antenna port as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS;

While being mapped to two OFDM symbols as A=2 and by DM-RS: for each DM-RS antenna port, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, or, using 2 DM-RS on the above each OFDM symbol that comprises DM-RS of this antenna port as one group, use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to every group of DM-RS.

Situation for supporting maximum 4 DM-RS antenna ports:

While being mapped to an OFDM symbol as A=4 and by DM-RS: for each DM-RS antenna port, using on this antenna port on a described OFDM symbol 2 DM-RS on adjacent or nearest two subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS;

While being mapped to an OFDM symbol as A=6 and by DM-RS: for each DM-RS antenna port, using on this antenna port on a described OFDM symbol 2 DM-RS on adjacent or nearest two subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS;

While being mapped to two OFDM symbols as A=6 and by DM-RS: for each DM-RS antenna port, to on this antenna port, be mapped with 2 DM-RS on two subcarriers adjacent or nearest on each OFDM symbol of DM-RS as one group described, or, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS;

Situation for supporting maximum 2 DM-RS antenna ports:

When A=2 or 4 or 6, and when DM-RS is mapped to two OFDM symbols: for each DM-RS antenna port, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, or, to on this antenna port, be mapped with 2 DM-RS on two subcarriers adjacent or nearest on each OFDM symbol of DM-RS as one group described, use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to every group of DM-RS;

When A=2 or 4 or 6 and when DM-RS is mapped to an OFDM symbol: for each DM-RS antenna port, using 2 DM-RS on the above OFDM symbol of this antenna port as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS;

While being mapped to two OFDM symbols as A=3 and by DM-RS: for each DM-RS antenna port, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to every group of DM-RS.

Referring to Fig. 6, the embodiment of the present invention provides a kind of data demodulation method, comprises the following steps:

Step 60: terminal is determined the physical resource for the special DM-RS of transmission user in current subframe;

Step 61: terminal is according to the DM-RS resource mapping method of each DM-RS antenna port, on the corresponding DM-RS RE of each DM-RS antenna port in current subframe on the physical resource for transmitting DM-RS, obtain the DM-RS that this DM-RS antenna port is corresponding respectively, the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from the top n OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 and be not more than 6 integer;

Step 62: terminal, according to DM-RS corresponding to each DM-RS antenna port, is carried out demodulation to the downlink data receiving on respective antenna port.

Concrete, for conventional CP, the maximum occurrences of N is 6; For expansion CP, the maximum occurrences of N is 5; Or for conventional CP and expansion CP, the maximum occurrences of N is 3.

Concrete, in TDD system, the subframe of transmission DM-RS is the special subframe of corresponding special subframe configuration 9 under conventional CP, or for expanding the special subframe of corresponding special subframe configuration 7 under CP; Or the subframe of transmission DM-RS is the descending sub frame in FDD system; Or in TDD system, the subframe of transmission DM-RS is the special subframe of corresponding other special subframe configurations except special subframe configuration 9 under conventional CP, or it is the special subframe of corresponding other special subframe configurations except special subframe configuration 7 under expansion CP; Or in TDD system, the subframe of transmission DM-RS is the special subframe of corresponding arbitrary special subframe configuration under conventional CP, or for expanding the special subframe of corresponding arbitrary special subframe configuration under CP.

Further, if the subframe of transmission DM-RS is synchronous transmission of signal subframe, terminal also receives synchronizing signal on the 3rd OFDM symbol in current subframe.

Concrete, when the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, these two OFDM symbols are continuous or discrete OFDM symbol; Preferably, these two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in current subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in current subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in current subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in current subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in current subframe, or be any two discontinuous OFDM symbols in the 1st, 2,4,5,6 OFDM symbols in current subframe;

Or,

When the DM-RS RE that each DM-RS antenna port is corresponding is the RE being different from the top n OFDM symbol in this subframe on an OFDM symbol of synchronous transmission of signal place OFDM symbol, this OFDM symbol is any one OFDM symbol except the OFDM symbol of synchronous transmission of signal place in top n OFDM symbol.Preferably, this OFDM symbol is any one in the 1st OFDM symbol in current subframe, the 2nd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol.

Example 1:

While being mapped to two OFDM symbols as A=6 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping is according to the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Or,

Example 2:

DM-RS RE corresponding to DM-RS antenna port in 5: one groupings of method is according to the 2nd, the 5th, the 8th and the 11st RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 1st, the 4th, the 7th and the 10th RE on described one or two OFDM symbol, or in described each PRB pair according to subcarrier number order from low to high corresponding the 3rd, the 6th, the 9th and the 12nd RE on described one or two OFDM symbol; Or,

Example 3:

While being mapped to two OFDM symbols as A=2 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping is according to 12-b+1-a of subcarrier number order from low to high correspondence on described two OFDM symbols and 12-b+1 RE in described each PRB pair, DM-RS RE corresponding to DM-RS antenna port in another grouping is according to b of subcarrier number order from low to high correspondence on described two OFDM symbols and b+a RE in described each PRB pair, wherein, in the time of b=1, a 1 to 10 comprises that 1 and 10 at interior arbitrary integer, in the time of b=2, a 1 to 10 comprises that 1 and 10 at the interior arbitrary integer except 9, in the time of b=3, a 1 to 9 comprises that 1 and 9 at the interior arbitrary integer except 7, in the time of b=4, a 1 to 8 comprises that 1 and 8 at the interior arbitrary integer except 5, in the time of b=5, a 1 to 7 comprises that 1 and 7 at the interior arbitrary integer except 3.

For above-mentioned example 1-example 3, in step 61 terminal obtain the specific implementation of DM-RS can be as follows:

Concrete, above-mentioned 8 DM-RS antenna ports are divided into 4 groups, each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS days lower port in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; A subcarrier definite in each PRB pair corresponding RE DM-RS antenna port in correspondence grouping on described one or two OFDM symbol when corresponding DM-RS RE, specifically can be comprised to following two kinds of examples in each PRB pair::

Example 1:

While being mapped to two OFDM symbols as A=3 and by DM-RS:

Example 2:

Method 2: DM-RS RE corresponding to DM-RS antenna port in first grouping is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in second grouping is according to 12-b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and 12-b+1 RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in the 3rd grouping is according to b+a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1+a RE in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in the 4th grouping is according to 12-b-a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and 12-b+1-a RE in described each PRB pair; Wherein, b=1, a=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2;

While being mapped to two OFDM symbols as A=3 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 2nd, the 7th and the 12nd RE on described two OFDM symbols, DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 6th and the 11st RE on described two OFDM symbols in described each PRB pair; Or,

While being mapped to an OFDM symbol as A=4 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 3rd, the 4th, the 11st and the 12nd RE on described two OFDM symbols, DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 2nd, the 9th and the 10th RE on described two OFDM symbols in described each PRB pair; Or,

Be mapped to one or two OFDM symbol during as A=6 and by DM-RS: DM-RS RE corresponding to DM-RS antenna port in a grouping is according to the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair.

Concrete, in the time supporting maximum 2 DM-RS antenna ports, the DM-RS RE that each DM-RS antenna port is corresponding is identical, and determines DM-RS RE corresponding to each DM-RS antenna port as follows:

Be mapped to one or two OFDM symbol during as A=4 and by DM-RS: the DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+a, b+2a and b+3a RE on described one or two OFDM symbol in described each PRB pair, wherein, a=1, b is 1 to 9 arbitrary integer including 1 and 9, or a=2, b is 1 to 6 arbitrary integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4; Or, the DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+1, b+a and b+1+a RE on described one or two OFDM symbol in described each PRB pair, wherein, a is 3 to 10 arbitrary integers including 3 and 10, be 1 to (11-a) including 1 and (11-a) arbitrary integer; Or,

For above-mentioned, 8 DM-RS antenna ports are divided into two examples of 4 groups and support the situation of maximum 4 and 2 DM-RS antenna ports, in step 61 terminal obtain the method for DM-RS can be as follows:

Below the resource mapping method of DM-RS is further illustrated:

RE corresponding to each DM-RS antenna port, taking a PRB pair as unit, be the different and equally distributed as far as possible A(1<A<12 of numbering in the subcarrier comprising at this PRBpair) individual subcarrier corresponding RE on described 1 or 2 OFDM symbol; For the special DM-RS of UE of 1 ~ 8 antenna port, can adopt following two kinds of method for mapping resource:

In method 1:8 antenna port, every 4 ports are one group, are divided into 2 groups, DM-RS RE corresponding to multiple different antenna ports in every group;

For example, when A=6 and DM-RS take two OFDM symbols: the DM-RSRE of first group of antenna port is according to subcarrier number the 3rd, 4,7,8,11,12 RE of correspondence on described two OFDM symbols from low to high in a PRB pair, the DM-RS RE of second group of antenna port is according to subcarrier number the 1st, 2,5,6,9,10 RE of correspondence on described two OFDM symbols from low to high, as shown in Fig. 7 a-Fig. 7 e in a PRB pair;

For each antenna port, by corresponding two subcarriers on two OFDM symbols on this antenna port (preferably, for adjacent or nearest subcarrier) 4 DM-RS as one group, use the orthogonal sequence (shown in table 1) that length is 4 to carry out spread spectrum, carry out spread spectrum as the DM-RS in circle in Fig. 7 a-Fig. 7 e is one group;

Wherein, discontinuous OFDM symbol situation is only taking the 2nd and the 4th as example, and in the time that discontinuous OFDM symbol is other combined situation in the the the 1st, 2,4,5,6, the DM-RS RE frequency domain position on each OFDM symbol, with Fig. 7 d, repeats no more;

Again for example, when A=4 and DM-RS take 2 OFDM symbols: the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 3rd, 4, 11, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 1st, 2, 9, 10 RE, as shown in Fig. 8 a-Fig. 8 d, or, the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 5th, 6, 11, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 3rd, 4, 9, 10 RE, or, for example, the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 5th, 6, 11, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 2nd, 3, 8, 9 RE, or 4 DM-RS RE on each OFDM symbol can be also mutual discontinuous 4 RE on frequency domain,

For each antenna port, by corresponding two subcarriers on two OFDM symbols on this antenna port (preferably, for adjacent or nearest subcarrier) 4 DM-RS as one group, use the orthogonal sequence (shown in table 1) that length is 4 to carry out spread spectrum, carry out spread spectrum as the DM-RS in circle in Fig. 8 a-Fig. 8 d is one group; Or, using 4 DM-RS on each OFDM symbol on this antenna port as one group, use the orthogonal sequence that length is 4 to carry out spread spectrum, as being one group, the DM-RS in square frame in Fig. 8 a-Fig. 8 d carries out spread spectrum;

Wherein, discontinuous OFDM symbol situation is only taking the 2nd and the 4th as example, and in the time that discontinuous OFDM symbol is other combined situation in the the the 1st, 2,4,5,6, the frequency domain position of the DM-RS RE on each OFDM symbol, with Fig. 8 d, repeats no more;

Again for example, when A=4 and DM-RS take 1 OFDM symbol: the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 7th, 8, 9, 10 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 3rd, 4, 5, 6 RE, as shown in Fig. 9 a-Fig. 9 b, (can be also other 4 continuous RE positions, for example first group the corresponding the 8th, 9, 10, 11 RE, second group the corresponding the 2nd, 3, 4, 5 RE, or, first group the corresponding the 9th, 10, 11, 12 RE, second group the corresponding the 1st, 2, 3, 4 RE), or, the DM-RS RE of first group of antenna port is according to subcarrier number the 3rd, 4,11,12 RE of correspondence on described 1 OFDM symbol from low to high in a PRB pair, the DM-RS RE of second group of antenna port is according to subcarrier number the 1st, 2,9,10 RE of correspondence on described 1 OFDM symbol from low to high, as shown in Figure 10 a-Figure 10 b in a PRB pair, or 4 DM-RS RE on this 1 OFDM symbol can be also mutual discontinuous 4 RE on frequency domain,

For each antenna port, be one group by 4 DM-RS on DM-RS place OFDM symbol on this antenna port, use the orthogonal sequence (shown in table 1) that length is 4 to carry out spread spectrum; As being one group, the DM-RS in circle in Fig. 9 a-Fig. 9 b and Figure 10 a-Figure 10 b carries out spread spectrum;

It should be noted that, in Fig. 9 a-Fig. 9 b and Figure 10 a-Figure 10 b, only provide the diagram that described 1 OFDM symbol is the 2nd or the 4th OFDM symbol, in the time that described 1 OFDM symbol is the 1st or the 5th or the 6th OFDM symbol, this structure is applicable equally, only DM-RS RE is moved on corresponding OFDM symbol.

Again for example, when A=2 and DM-RS take 2 OFDM symbols: the DM-RSRE of first group of antenna port is according to subcarrier number the 4th, 12 RE of correspondence on described two OFDM symbols from low to high in a PRB pair, the DM-RS RE of second group of antenna port is according to subcarrier number the 1st, 9 RE of correspondence on described two OFDM symbols from low to high, as shown in Figure 11 a-Figure 11 d in a PRB pair; Or, the DM-RS RE of first group of antenna port is according to subcarrier number the 3rd, 11 RE of correspondence on described two OFDM symbols from low to high in a PRB pair, the DM-RS RE of second group of antenna port is according to subcarrier number the 2nd, 10 RE of correspondence on described two OFDM symbols from low to high, as shown in Figure 12 a-Figure 12 d in a PRB pair;

For each antenna port, using 4 DM-RS on two OFDM symbols on this antenna port as one group, use the orthogonal sequence (shown in table 1) that length is 4 to carry out spread spectrum, carry out spread spectrum as the DM-RS in circle in Figure 11 a-Figure 11 d and Figure 12 a-Figure 12 d is one group;

Wherein, discontinuous OFDM symbol situation is only taking the 2nd and the 4th as example, and in the time that discontinuous OFDM symbol is other combined situation in the the the 1st, 2,4,5,6, the DM-RS RE frequency domain position on each OFDM symbol, with Figure 11 d, repeats no more.

In method 2:8 antenna port, every 2 ports are one group, are divided into 4 groups, DM-RS RE corresponding to multiple different antenna ports in every group;

For example, when A=3 and DM-RS take 2 OFDM symbols: the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 4th, 8, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 1st, 5, 9 RE, the DM-RS RE of the 3rd group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 3rd, 7, 11 RE, the DM-RS RE of the 4th group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 2nd, 6, 10 RE, as shown in Figure 13 a-Figure 13 d,

For each antenna port, using 2 DM-RS of corresponding same subcarrier on two OFDM symbols on this antenna port as one group, use the orthogonal sequence (shown in table 2) that length is 2 to carry out spread spectrum, carry out spread spectrum as the DM-RS in circle in Figure 13 a-Figure 13 d is one group;

Wherein, discontinuous OFDM symbol situation is only taking the 2nd and the 4th as example, and in the time that discontinuous OFDM symbol is other combined situation in the the the 1st, 2,4,5,6, the DM-RS RE frequency domain position on each OFDM symbol, with Figure 13 d, repeats no more.

Again for example, when A=2 and DM-RS take 2 OFDM symbols: the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 4th, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 1st, 9 RE, the DM-RS RE of the 3rd group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 3rd, 11 RE, the DM-RS RE of the 4th group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 2nd, 10 RE, as shown in Figure 14 a-Figure 14 d, other frequency domain position combinations that do not change DM-RS RE number are also contained in the method,

For each antenna port, using 2 DM-RS of corresponding same subcarrier on two OFDM symbols on this antenna port as one group, use the orthogonal sequence (shown in table 2) that length is 2 to carry out spread spectrum, as being one group, the DM-RS in circle in Figure 14 a-Figure 14 d carries out spread spectrum, or, using 2 DM-RS on each OFDM symbol on this antenna port as one group, use the orthogonal sequence (shown in table 2) that length is 2 to carry out spread spectrum, carry out spread spectrum as the DM-RS in square frame in Figure 14 a-Figure 14 d is one group;

Wherein, discontinuous OFDM symbol situation is only taking the 2nd and the 4th as example, and in the time that discontinuous OFDM symbol is other combined situation in the the the 1st, 2,4,5,6, the DM-RS RE frequency domain position on each OFDM symbol, with Figure 14 d, repeats no more.

Again for example, when A=2 and DM-RS take 1 OFDM symbol: the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 9th, 10 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 3rd, 4 RE, the DM-RS RE of the 3rd group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 5th, 6 RE, the DM-RS RE of the 4th group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 7th, 8 RE, and as shown in Figure 15 a-Figure 15 b (can be also other 2 continuous RE positions, for example first group the corresponding the 11st, 12 RE, second group the corresponding the 1st, 2 RE, the 3rd group the corresponding the 9th, 10 RE, the 4th group the corresponding the 3rd, 4 RE, or, first group the corresponding the 11st, 12 RE, second group the corresponding the 1st, 2 RE, the 3rd group the corresponding the 8th, 9 RE, the 4th group the corresponding the 4th, 5 RE, or, first group the corresponding the 11st, 12 RE, second group the corresponding the 1st, 2 RE, the 3rd group the corresponding the 7th, 8 RE, the 4th group the corresponding the 5th, 6 RE, or, first group the corresponding the 11st, 12 RE, second group the corresponding the 2nd, 3 RE, the 3rd group the corresponding the 8th, 9 RE, the 4th group the corresponding the 5th, 6 RE, or, first group the corresponding the 10th, 11 RE, second group the corresponding the 2nd, 3 RE, the 3rd group the corresponding the 8th, 9 RE, the 4th group the corresponding the 4th, 5 RE, or, first group the corresponding the 10th, 11 RE, second group the corresponding the 2nd, 3 RE, the 3rd group the corresponding the 7th, 8 RE, the 4th group the corresponding the 5th, 6 RE etc.), for example only retain in Figure 14 a-Figure 14 d the resource mapping method that the DM-RS on one of them OFDM symbol obtains,

For each antenna port, using 2 DM-RS on this 1 OFDM symbol on this antenna port as one group, use the orthogonal sequence (shown in table 2) that length is 2 to carry out spread spectrum, as being one group, the DM-RS in circle in Figure 15 a-Figure 15 b carries out spread spectrum;

Wherein, discontinuous OFDM symbol situation is only taking the 2nd or the 4th OFDM symbol as example, and in the time that this 1 OFDM symbol is other symbols in the the the 1st, 2,4,5,6, the DM-RS RE frequency domain position on 1 OFDM symbol, with Figure 15 a-Figure 15 b, repeats no more.

Especially, for the special DM-RS of UE of 1 ~ 4 antenna port:

4 antenna ports are as 1 group, 4 DM-RS RE that different antenna ports is corresponding identical, can use in upper figure in the resource mapping method in employing method 1, any one group of resource mapping method that port is corresponding in two groups of ports, spread spectrum mode is with above-mentioned 8 antenna port modes (adopting length is 4 frequency expansion sequence);

Or, in 4 antenna ports, every two is 1 group, be divided into 2 groups, 4 DM-RS RE that different antenna ports is corresponding identical, every group adopts respectively in upper figure in every kind of resource mapping method in employing method 1, any one group of corresponding resource mapping method in two groups of antenna ports, spread spectrum mode is with this 8 antenna port mode (adopting length is 4 frequency expansion sequence), or uses described in the frequency expansion sequence that length is 22 DM-RS corresponding to same subcarrier on OFDM symbol to carry out spread spectrum; Or, in every kind of resource mapping method that every group adopts respectively in method 1, any one group of corresponding resource mapping method in 4 groups of antenna ports, spread spectrum mode is with this 8 antenna port mode (adopting length is 2 frequency expansion sequence);

Preferably, for 1 ~ 4 antenna port DM-RS transmission, its resource mapping method is not limited to the mapping mode of above-mentioned 8 antenna ports, in mapping mode for A=6,4,3,2,1 above-mentioned 8 antenna ports, do not change 1 DM-RS RE number on OFDM symbol, but the method that changes frequency domain position comprises in the present invention equally

For example, while taking two OFDM symbols for A=3 and DM-RS RE, can also adopt the mode shown in Figure 16 a-Figure 16 d, in 4 antenna ports, every two ports are one group, be divided into 2 groups, the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number corresponding the 2nd, 7,12 RE on described two OFDM symbols from low to high, the DM-RSRE of second group of antenna port is according to subcarrier number corresponding the 1st, 6,11 RE on described two OFDM symbols from low to high in a PRB pair;

For each antenna port, using 2 DM-RS of corresponding same subcarrier on two OFDM symbols on this antenna port as one group, use the orthogonal sequence (shown in table 2) that length is 2 to carry out spread spectrum;

Wherein, in other combined situation of discontinuous OFDM, the frequency domain position of the upper DM-RS of each OFDM is identical with Figure 16 a-Figure 16 d, is not repeated herein.

Again for example, while taking 1 OFDM symbol for A=4 and DM-RS RE, can also adopt the mode shown in Figure 17 a, in 4 antenna ports, every two ports are one group, be divided into 2 groups, the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 3rd, 4, 11, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 1st, 2, 9, 10 RE(are by any one group of resource mapping method that the DM-RS RE being made up of two continuous RE of frequency domain carries out obtaining after translation at frequency domain in Figure 17 a, and the situation that takies respectively 4 discontinuous RE is also contained in the present invention), again for example, while taking 1 OFDM symbol for A=6 and DM-RS RE, can also adopt the mode shown in Figure 17 a, in 4 antenna ports, every two ports are one group, be divided into 2 groups, the DM-RS RE of first group of antenna port be in a PRB pair according to subcarrier number from low to high on described 1 OFDM symbol the corresponding the 3rd, 4, 7, 8, 11, 12 RE, the DM-RS RE of second group of antenna port be in a PRB pair according to subcarrier number from low to high on described two OFDM symbols the corresponding the 1st, 2, 5, 6, 9, 10 RE(are by any one group of resource mapping method that the DM-RS RE being made up of two continuous RE of frequency domain carries out obtaining after translation at frequency domain in Figure 17 a, and the situation that takies respectively 6 discontinuous RE is also contained in the present invention),

For each antenna port, using 2 DM-RS on this 1 OFDM symbol on this antenna port as one group, use the orthogonal sequence (shown in table 2) that length is 2 to carry out spread spectrum;

Wherein, in above-mentioned Figure 17 a only with the 2nd OFDM symbol for, on this OFDM symbol, the frequency domain position of corresponding DM-RS RE is placed on the 1st, 4,5,6 OFDM symbols applicablely equally, can obtain new resource mapping method;

For expansion CP, said method adapts to equally, and can support 1 ~ 8 antenna port DM-RS transmission, because each time slot (slot) in expansion CP comprises 6 OFDM symbols, the each time slot of conventional CP comprises 7 OFDM symbols, concrete resource mapping figure can be the resource mapping figure obtaining after last the OFDM symbol in each time slot being removed in Fig. 7 a ~ 17b, and by time domain or frequency domain is adjacent or 2 contiguous DM-RS are one group, uses the orthogonal sequence that length is 2 to carry out spread spectrum.

Especially, in the time only supporting 2 antenna port transmission under expansion CP, can only select 2 mapping resources corresponding to antenna port in the resource mapping method of said method to carry out DM-RS mapping, preferably, the DM-RS mapping resource of these two antenna ports is identical, for example, when A=4 and DM-RS take two OFDM symbols, also can use the resource mapping method as shown in Figure 18 a-Figure 18 c, wherein, when two OFDM symbols are the 4th and the 5th or when discrete two OFDM symbols, DM-RS RE frequency domain position on each OFDM symbol is identical with Figure 18 a-Figure 18 c, repeat no more, A=3,2 situation are similar to A=4, and on two OFDM symbols, reducing by 1 of corresponding same sub-carrier or 2 RE can obtain simultaneously, preferred, reduces the RE in frequency domain centre position, when A=4 and DM-RS take 1 OFDM symbol, also can use the resource mapping method as shown in Figure 19 a, when A=6 and DM-RS take 1 OFDM symbol, also can use the resource mapping method as shown in Figure 19 b, wherein, when two OFDM symbols be the 1st 45 time, the DM-RS frequency domain position on this symbol is identical with Figure 19 a, Figure 19 b, is not repeated herein.

It should be noted that: above-mentioned antenna port packet mode can be not limited to the packet mode shown in figure, any antenna port packet mode can be applicable to the resource mapping method shown in figure, for example, port 7,8,9,10 can also be divided into 1 group, port one 1,12,13,14 is divided into 1 group, as long as UE and base station are consistent to the corresponding relation understanding of the resource mapping method in antenna port grouping and every group of antenna port and figure; Constant in DM-RS RE number, other modes that change frequency domain mapping position in above-described embodiment are also contained in this method.

It should be noted that: in said process, when support 8 antenna port definition DM-RS method for mapping resource according to maximum, for the DM-RS transmission of UE and base station side, in current subframe, the actual DM-RS antenna port number using can be 1 port, for example port 7 or port 8, or v port, for example port 7 ~ 7+v, v is greater than 1 to be less than or equal to 7 positive integer, when as UE and base station, the DM-RS antenna port number of actual use in the time transmitting DM-RS is less than 8, according to 8 undefined DM-RS method for mapping resource of antenna port different grouping mode, the for example method for mapping resource in Fig. 7 a ~ Figure 15 b, use method for mapping resource corresponding to antenna port of actual transmissions DM-RS in the method, DM-RS is carried out resource mapping (base station side) and receives (UE side), for example, while being only suitable for antenna port 7 and 8 transmission DM-RS in current subframe, only carry out DM-RS mapping (base station side) and receive (UE side) according to the method for mapping resource of antenna port 7 and 8 correspondences, for according to the situation of maximum 4 ports or maximum 2 port definition DM-RS method for mapping resource, also can support to be less than the DM-RS transmission of maximum port number, similar said process, repeats no more.

Referring to Figure 20, the embodiment of the present invention provides a kind of base station, and this base station comprises:

Transfer resource determining unit 201, for determining that current subframe is for transmitting the physical resource of DM-RS;

DM-RS map unit 202, be used for according to the DM-RS resource mapping method of each DM-RS antenna port, respectively DM-RS corresponding to each DM-RS antenna port in current subframe is mapped to this DM-RS antenna port described for transmitting DM-RS Resource Unit RE corresponding on the physical resource of DM-RS, DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n orthogonal frequency division multiplex OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 integer;

Transmission unit 203, in this subframe for transmitting the physical resource of DM-RS, by sending the DM-RS after resource mapping for the antenna port that transmits DM-RS to terminal in this subframe.

Further, described DM-RS map unit 202 specifically for: for regular circulation prefix CP, the maximum occurrences of determining described N is 6; For expansion CP, the maximum occurrences of determining described N is 5; Or,

For conventional CP and expansion CP, the maximum occurrences of determining described N is 3.

Further, described DM-RS map unit 202 specifically for: in TDD system, determine that described subframe is the special subframe of corresponding special subframe configuration 9 under conventional CP, or be the special subframe of corresponding special subframe configuration 7 under expansion CP; Or,

Determine that described subframe is the descending sub frame in FDD system; Or,

In TDD system, determine that described subframe is the special subframe of corresponding other special subframe configurations except special subframe configuration 9 under conventional CP, or for expanding the special subframe of corresponding other special subframe configurations except special subframe configuration 7 under CP; Or,

In TDD system, determine that described subframe is the special subframe of corresponding arbitrary special subframe configuration under conventional CP, or for expanding the special subframe of corresponding arbitrary special subframe configuration under CP.

Further, described transmission unit 203 also for:

In the time that described subframe is synchronous transmission of signal subframe, synchronous signal transmission on the 3rd OFDM symbol in this subframe.

Further, described DM-RS map unit 202 specifically for: in the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, determine that described two OFDM symbols are continuous or discrete OFDM symbol; Or,

In the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on an OFDM symbol of synchronous transmission of signal place OFDM symbol, determine that a described OFDM symbol is any one OFDM symbol except the OFDM symbol of synchronous transmission of signal place in described top n OFDM symbol.

Further, described DM-RS map unit 202 is further used for: determine that described two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in described subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 1st in described subframe, 2, 4, 5, any two discontinuous OFDM symbols in 6 OFDM symbols,

Determine that a described OFDM symbol is any one in the 1st OFDM symbol in described subframe, the 2nd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol.

Further, described DM-RS map unit 202 specifically for: determine DM-RS RE corresponding to described each DM-RS antenna port, described for transmitting the corresponding PRB pair set of physical resource of DM-RS, the different subcarrier of comprise A numbering of each PRB pair corresponding RE on described one or two OFDM symbol, wherein A is greater than 1 and be less than 12 integer.

Further, described DM-RS map unit 202 is further used for:

In the time supporting maximum 8 DM-RS antenna ports, determine as follows DM-RS RE corresponding to described each DM-RS antenna port:

Further, in the time that 8 DM-RS antenna ports are divided into 2 groups by described DM-RS map unit 202, described DM-RS map unit 202 is further used for:

While being mapped to two OFDM symbols as A=6 and by DM-RS, determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Or,

While being mapped to one or two OFDM symbol as A=4 and by DM-RS, 1 determines two DM-RS RE that the DM-RS antenna port in grouping is corresponding to a method in method 5 as follows:

Method 1: determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to subcarrier number order from low to high corresponding 12-b-a, 12-b+1-a, 12-b and 12-b+1 RE on described one or two OFDM symbol in described each PRB pair; Determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding b, b+1, b+a and b+1+a RE on described one or two OFDM symbol in described each PRB pair; Wherein, in the time of b=1, a=8 or 7 or 6 or 4 or 3 or 2, in the time of b=2, a=6 or 5 or 3 or 2, in the time of b=3, a=4 or 2;

Method 2: determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 5th, the 6th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; Determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number corresponding the 3rd, the 4th, the 9th and the 10th RE on described one or two OFDM symbol from low to high in described each PRB pair, or, be according to the 2nd, the 3rd, the 8th and the 9th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair;

Method 3: taking in described each PRB pair according to subcarrier number order from low to high on described one or two OFDM symbol corresponding the 1st, the 4th, the 7th and the 10th RE as one group of DM-RS RE, the 3rd, the 6th, the 9th and the 12nd RE are one group of DM-RS RE, the 2nd, the 5th, the 8th and the 11st RE are one group of DM-RS RE, determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is a group in described 3 groups of DM-RS RE; Determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is another group in described 3 groups of DM-RS RE;

Method 4: determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to subcarrier number order from low to high corresponding 12-b-c+1-a, 12-b+1-a, 12-b-c+1 and 12-b+1 RE on described one or two OFDM symbol in described each PRB pair; Determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding b, b+c, b+a and b+c+a RE on described one or two OFDM symbol in described each PRB pair; Wherein, b=1, c=3, a=6, or, b=1, c=2, a=4, or b=2, c=2, a=4;

Method 5: determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 2nd, the 5th, the 8th and the 11st RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; Determine DM-RS RE corresponding to DM-RS antenna port in another grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 1st, the 4th, the 7th and the 10th RE on described one or two OFDM symbol, or in described each PRB pair according to subcarrier number order from low to high corresponding the 3rd, the 6th, the 9th and the 12nd RE on described one or two OFDM symbol; Or,

While being mapped to two OFDM symbols as A=2 and by DM-RS, determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to 12-b+1-a of subcarrier number order from low to high correspondence on described two OFDM symbols and 12-b+1 RE in described each PRB pair, determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to b of subcarrier number order from low to high correspondence on described two OFDM symbols and b+a RE in described each PRB pair, wherein, in the time of b=1, a 1 to 10 comprises that 1 and 10 at interior arbitrary integer, in the time of b=2, a 1 to 10 comprises that 1 and 10 at the interior arbitrary integer except 9, in the time of b=3, a 1 to 9 comprises that 1 and 9 at the interior arbitrary integer except 7, in the time of b=4, a 1 to 8 comprises that 1 and 8 at the interior arbitrary integer except 5, in the time of b=5, a 1 to 7 comprises that 1 and 7 at the interior arbitrary integer except 3.

Further, this base station also comprises:

The first spectrum-spreading unit 204, in this subframe for transmitting the physical resource of DM-RS, by this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal:

Further, in the time that 8 DM-RS antenna ports are divided into 4 groups by described DM-RS map unit, described DM-RS map unit 202 is further used for:

While being mapped to two OFDM symbols as A=3 and by DM-RS, determine that DM-RS RE corresponding to DM-RS antenna port in first grouping is according to the 4th, the 8th and the 12nd RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that second DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 1st, the 5th and the 9th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that the 3rd DM-RSRE corresponding to DM-RS antenna port in grouping is according to the 3rd, the 7th and the 11st RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that the 4th DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 2nd, the 6th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Or,

While being mapped to one or two OFDM symbol as A=2 and by DM-RS, 1 determines four DM-RS RE that the DM-RS antenna port in grouping is corresponding to a method in method 3 as follows:

Method 1: using in described each PRB pair according to subcarrier number order from low to high on described one or two OFDM symbol corresponding b and b+a RE as one group, obtain (12-a) group RE, wherein, a 2 to 8 comprises that 2 and 8 at interior arbitrary integer, and b 1 comprises 1 and (12-a) at interior arbitrary integer to (12-a); Determine that DM-RS RE corresponding to DM-RS antenna port in first, second, third and fourth grouping is respectively one group of RE in described (12-a) group RE, the described RE group of each grouping correspondence is different;

Method 2: determine that DM-RS RE corresponding to DM-RS antenna port in first grouping is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1 RE in described each PRB pair; Determine that second DM-RS RE corresponding to the DM-RS antenna port in grouping is according to 12-b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and 12-b+1 RE in described each PRB pair; Determine that the 3rd DM-RS RE corresponding to the DM-RS antenna port in grouping is according to b+a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1+a RE in described each PRB pair; Determine that the 4th DM-RS RE corresponding to the DM-RS antenna port in grouping is according to 12-b-a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and 12-b+1-a RE in described each PRB pair; Wherein, b=1, a=2 or 3 or 4, or, b=2, a=2 or 3, or b=3, a=2;

Method 3: determine that DM-RS RE corresponding to DM-RS antenna port in first grouping is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+1 RE in described each PRB pair; Determine that second DM-RS RE corresponding to the DM-RS antenna port in grouping is according to b+a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+a+1 RE in described each PRB pair; Determine that the 3rd DM-RS RE corresponding to the DM-RS antenna port in grouping is according to b+2a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+2a+1 RE in described each PRB pair; Determine that the 4th DM-RS RE corresponding to the DM-RS antenna port in grouping is according to b+3a of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+3a+1 RE in described each PRB pair; Wherein, a=2, b 1 to 5 comprises that 1 and 5 at interior arbitrary integer, or, a=3, b=1 or 2.

Further, described DM-RS map unit 202 is further used for:

In the time supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS antenna ports in same grouping, and determine as follows DM-RS RE corresponding to each DM-RS antenna port:

While being mapped to two OFDM symbols as A=3 and by DM-RS: determine a DM-RS RE corresponding to the DM-RS antenna port in grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 2nd, the 7th and the 12nd RE on described two OFDM symbols, determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 6th and the 11st RE on described two OFDM symbols in described each PRB pair; Or,

While being mapped to an OFDM symbol as A=4 and by DM-RS: determine a DM-RS RE corresponding to the DM-RS antenna port in grouping be in described each PRB pair according to subcarrier number order from low to high corresponding the 3rd, the 4th, the 11st and the 12nd RE on described two OFDM symbols, determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding the 1st, the 2nd, the 9th and the 10th RE on described two OFDM symbols in described each PRB pair; Or,

Be mapped to one or two OFDM symbol during as A=6 and by DM-RS: determine that a DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 3rd, the 4th, the 7th, the 8th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; Determine that DM-RS RE corresponding to DM-RS antenna port in another grouping is according to the 1st, the 2nd, the 5th, the 6th, the 9th and the 10th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair.

Further, described DM-RS map unit 202 is further used for:

In the time supporting maximum 2 DM-RS antenna ports, determine that the DM-RS RE that each DM-RS antenna port is corresponding is identical, and determine DM-RS RE corresponding to each DM-RS antenna port as follows:

Be mapped to one or two OFDM symbol during as A=2 and by DM-RS: determine that the DM-RS RE that each DM-RS antenna port is corresponding is according to b of subcarrier number order from low to high correspondence on described one or two OFDM symbol and b+a RE in described each PRB pair, wherein, a 1 to 11 comprises that 1 and 11 at interior arbitrary integer, and b 1 comprises 1 and (12-a) at interior arbitrary integer to (12-a); Or,

While being mapped to two OFDM symbols as A=3 and by DM-RS: determine DM-RS RE that each DM-RS antenna port is corresponding be in described each PRB pair according to subcarrier number order from low to high corresponding the 2nd, the 7th and the 12nd RE on described two OFDM symbols, or determine that DM-RS RE corresponding to each DM-RS antenna port is according to subcarrier number order from low to high corresponding the 1st, the 6th and the 11st RE on described two OFDM symbols in described each PRB pair; Or,

Be mapped to one or two OFDM symbol during as A=4 and by DM-RS: determine that DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+a, b+2a and b+3a RE on described one or two OFDM symbol in described each PRB pair, wherein, a=1, b is 1 to 9 arbitrary integer including 1 and 9, or a=2, b is 1 to 6 arbitrary integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4; Or, determine that DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+1, b+a and b+1+a RE on described one or two OFDM symbol in described each PRB pair, wherein, a is 3 to 10 arbitrary integers including 3 and 10, be 1 to (11-a) including 1 and (11-a) arbitrary integer; Or,

Be mapped to one or two OFDM symbol during as A=6 and by DM-RS: determine that the DM-RS RE that each DM-RS antenna port is corresponding is according to the 2nd, the 3rd, the 6th, the 7th, the 10th and the 11st RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair.

Further, this base station also comprises:

The second spectrum-spreading unit 205, in this subframe for transmitting the physical resource of DM-RS, by this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal:

Referring to Figure 21, the embodiment of the present invention also provides a kind of terminal, and this terminal comprises:

Transfer resource determining unit 211, for determining that current subframe is for transmitting the physical resource of DM-RS;

DM-RS acquiring unit 212, be used for according to the DM-RS resource mapping method of each DM-RS antenna port, each DM-RS antenna port in current subframe obtains for transmitting on the corresponding DM-RS Resource Unit RE on the physical resource of DM-RS the DM-RS that this DM-RS antenna port is corresponding described respectively, and DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n orthogonal frequency division multiplex OFDM symbol in this subframe on one or two OFDM symbol of synchronous transmission of signal place OFDM symbol; Wherein N is not less than 1 and be not more than 6 integer;

Demodulating unit 213, for according to DM-RS corresponding to each DM-RS antenna port, carries out demodulation to the downlink data receiving on respective antenna port.

Further, described DM-RS acquiring unit 212 specifically for: for regular circulation prefix CP, the maximum occurrences of determining described N is 6; For expansion CP, the maximum occurrences of determining described N is 5; Or,

Further, described DM-RS acquiring unit 212 specifically for: in TDD system, determine that described subframe is the special subframe of corresponding special subframe configuration 9 under conventional CP, or be the special subframe of corresponding special subframe configuration 7 under expansion CP; Or,

Further, described DM-RS acquiring unit 212 also for:

In the time that described subframe is synchronous transmission of signal subframe, on the 3rd OFDM symbol in described subframe, receive synchronizing signal.

Further, in the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, described DM-RS acquiring unit 212 specifically for: determine that described two OFDM symbols are continuous or discrete OFDM symbol; Or,

In the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on an OFDM symbol of synchronous transmission of signal place OFDM symbol, described DM-RS acquiring unit 212 specifically for: determine that a described OFDM symbol is any one OFDM symbol except the OFDM symbol of synchronous transmission of signal place in described top n OFDM symbol.

Further, described DM-RS acquiring unit 212 is further used for: determine that described two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in described subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 1st in described subframe, 2, 4, 5, any two discontinuous OFDM symbols in 6 OFDM symbols,

Further, described DM-RS acquiring unit 212 specifically for: determine DM-RS RE corresponding to described each DM-RS antenna port, described for transmitting the corresponding PRB pair set of physical resource of DM-RS, the different subcarrier of comprise A numbering of each PRB pair corresponding RE on described one or two OFDM symbol, wherein A is greater than 1 and be less than 12 integer.

Further, described DM-RS acquiring unit 212 is further used for:

Further, in the time that 8 DM-RS antenna ports are divided into 2 groups by described DM-RS acquiring unit 212, described DM-RS acquiring unit 212 is further used for:

Further, described DM-RS acquiring unit 212 for:

Further, in the time that 8 DM-RS antenna ports are divided into 4 groups by described DM-RS acquiring unit 212, described DM-RS acquiring unit 212 is further used for:

While being mapped to two OFDM symbols as A=3 and by DM-RS, determine that DM-RS RE corresponding to DM-RS antenna port in first grouping is according to the 4th, the 8th and the 12nd RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that second DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 1st, the 5th and the 9th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that the 3rd DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 3rd, the 7th and the 11st RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Determine that the 4th DM-RS RE corresponding to the DM-RS antenna port in grouping is according to the 2nd, the 6th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Or,

Further, described DM-RS acquiring unit 212 is further used for:

Further, described DM-RS acquiring unit 212 for:

The present invention program can be applied on NCT.

To sum up, beneficial effect of the present invention comprises:

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or 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, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and amendment to these embodiment.So claims are intended to be interpreted as comprising 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 changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. user's dedicated demodulation reference signal DM-RS transmission method, is characterized in that, the method comprises:

2. the method for claim 1, is characterized in that, for regular circulation prefix CP, the maximum occurrences of described N is 6; For expansion CP, the maximum occurrences of described N is 5; Or,

For conventional CP and expansion CP, the maximum occurrences of described N is 3.

3. the method for claim 1, is characterized in that, in TDD system, described subframe is the special subframe of corresponding special subframe configuration 9 under conventional CP, or for expanding the special subframe of corresponding special subframe configuration 7 under CP; Or,

Described subframe is the descending sub frame in FDD system; Or,

In TDD system, described subframe is the special subframe of corresponding other special subframe configurations except special subframe configuration 9 under conventional CP, or for expanding the special subframe of corresponding other special subframe configurations except special subframe configuration 7 under CP; Or,

In TDD system, described subframe is the special subframe of corresponding arbitrary special subframe configuration under conventional CP, or for expanding the special subframe of corresponding arbitrary special subframe configuration under CP.

4. the method for claim 1, is characterized in that, if described subframe is synchronous transmission of signal subframe, on the 3rd the OFDM symbol of synchronizing signal in this subframe, transmits.

5. the method for claim 1, it is characterized in that, when DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, described two OFDM symbols are continuous or discrete OFDM symbol; Or,

When DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on an OFDM symbol of synchronous transmission of signal place OFDM symbol, a described OFDM symbol is any one OFDM symbol except the OFDM symbol of synchronous transmission of signal place in described top n OFDM symbol.

6. method as claimed in claim 5, it is characterized in that, described two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in described subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 1st in described subframe, 2, 4, 5, any two discontinuous OFDM symbols in 6 OFDM symbols,

A described OFDM symbol is any one in the 1st OFDM symbol in described subframe, the 2nd OFDM symbol, the 4th OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol.

7. the method for claim 1, it is characterized in that, DM-RS RE corresponding to described each DM-RS antenna port, describedly for the corresponding Physical Resource Block of physical resource that transmits DM-RS, PRB pair to be gathered, the different subcarrier of comprise A numbering of each PRB pair corresponding RE on described one or two OFDM symbol, wherein A is greater than 1 and be less than 12 integer.

8. method as claimed in claim 7, is characterized in that, in the time supporting maximum 8 DM-RS antenna ports, DM-RS RE corresponding to described each DM-RS antenna port determines as follows:

9. method as claimed in claim 8, is characterized in that, 8 DM-RS antenna ports are divided into 2 groups, and each grouping comprises 4 DM-RS antenna ports, DM-RS RE corresponding to 4 DM-RS antenna ports in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; The DM-RS RE of the DM-RS antenna port correspondence in each PRB pair using the RE of A subcarrier definite in each PRB pair correspondence on described one or two OFDM symbol in correspondence grouping, specifically comprises:

DM-RS RE corresponding to DM-RS antenna port in 2: one groupings of method is according to the 5th, the 6th, the 11st and the 12nd RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair; DM-RS R corresponding to DM-RS antenna port in another grouping is according to subcarrier number corresponding the 3rd, the 4th, the 9th and the 10th RE on described one or two OFDM symbol from low to high in described each PRB pair, or, be according to the 2nd, the 3rd, the 8th and the 9th RE of subcarrier number order from low to high correspondence on described one or two OFDM symbol in described each PRB pair;

DM-RS RE corresponding to DM-RS antenna port in 4: one groupings of method is according to subcarrier number order from low to high corresponding 12-b-c+1-a, 12-b+1-a, 12-b-c+1 and 12-b+1 RE on described one or two OFDM symbol in described each PRBpair; DM-RS RE corresponding to DM-RS antenna port in another grouping is according to subcarrier number order from low to high corresponding b, b+c, b+a and b+c+a RE on described one or two OFDM symbol in described each PRB pair; Wherein, b=1, c=3, a=6, or, b=1, c=2, a=4, or b=2, c=2, a=4;

10. as the method as described in arbitrary in claim 7 ~ 9, it is characterized in that, network side in this subframe for transmitting the physical resource of DM-RS, by this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal, further comprise:

When A is not 4 integral multiple and DM-RS while being mapped in two OFDM symbols:

For each DM-RS antenna port, using on this DM-RS antenna port on described two OFDM symbols 4 DM-RS on adjacent or nearest two subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing; Or,

In the time of integral multiple that A is 4:

For each DM-RS antenna port, using on this DM-RS antenna port on each OFDM symbol that is mapped with DM-RS 4 DM-RS on adjacent or nearest 4 subcarriers as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 4 respectively every group of DM-RS to be carried out to spread processing.

11. methods as claimed in claim 8, is characterized in that, 8 DM-RS antenna ports are divided into 4 groups, and each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS days lower port in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; A subcarrier definite in each PRB pair corresponding RE DM-RS antenna port in correspondence grouping on described one or two OFDM symbol when corresponding DM-RS RE, is specifically comprised in each PRB pair:

While being mapped to two OFDM symbols as A=3 and by DM-RS:

DM-RS RE corresponding to DM-RS antenna port in the 4th grouping is according to the 2nd, the 6th and the 10th RE of subcarrier number order from low to high correspondence on described two OFDM symbols in described each PRB pair; Or,

12. methods as claimed in claim 7, it is characterized in that, in the time supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS antenna ports in same grouping, and determine as follows DM-RS RE corresponding to each DM-RS antenna port:

13. methods as claimed in claim 7, is characterized in that, in the time supporting maximum 2 DM-RS antenna ports, the DM-RS RE that each DM-RS antenna port is corresponding is identical, and determine DM-RS RE corresponding to each DM-RS antenna port as follows:

Be mapped to one or two OFDM symbol during as A=4 and by DM-RS: the DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+a, b+2a and b+3a RE on described one or two OFDM symbol in described each PRB pair, wherein, a=1, b is 1 to 9 arbitrary integer including 1 and 9, or a=2, b is 1 to 6 arbitrary integer including 1 and 6, or a=3, b=1 or 2 or 3 or 4; Or, the DM-RS RE that each DM-RS antenna port is corresponding is according to subcarrier number order from low to high corresponding b, b+1, b+a and b+1+a RE on described one or two OFDM symbol in described each PRB pair, wherein, a is 3 to 10 arbitrary integers including 3 and 10, b be 1 to (11-a) including 1 and (11-a) arbitrary integer; Or,

14. methods as described in as arbitrary in claim 11 ~ 13, it is characterized in that, network side in this subframe for transmitting the physical resource of DM-RS, by this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal, further comprise:

In the time that DM-RS is mapped to two OFDM symbols:

For each DM-RS antenna port, using on this antenna port on described two OFDM symbols 2 DM-RS of corresponding same subcarrier as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to every group of DM-RS; Or,

In the time of integral multiple that A is 2:

For each DM-RS antenna port, using 2 DM-RS on the described OFDM symbol that is mapped with DM-RS on this antenna port as one group, and use the orthogonal sequence that length that this antenna port is corresponding is 2 to carry out spread processing to this group DM-RS.

15. 1 kinds of data demodulation methods, is characterized in that, the method comprises:

16. methods as claimed in claim 15, is characterized in that, for regular circulation prefix CP, the maximum occurrences of described N is 6; For expansion CP, the maximum occurrences of described N is 5; Or,

17. methods as claimed in claim 15, is characterized in that, in TDD system, described subframe is the special subframe of corresponding special subframe configuration 9 under conventional CP, or for expanding the special subframe of corresponding special subframe configuration 7 under CP; Or,

Described subframe is the descending sub frame in FDD system; Or,

18. methods as claimed in claim 15, is characterized in that, if described subframe is synchronous transmission of signal subframe, further comprise:

On the 3rd the OFDM symbol of terminal in described subframe, receive synchronizing signal.

19. methods as claimed in claim 15, it is characterized in that, when DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, described two OFDM symbols are continuous or discrete OFDM symbol; Or,

20. methods as claimed in claim 19, it is characterized in that, described two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in described subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 1st in described subframe, 2, 4, 5, any two discontinuous OFDM symbols in 6 OFDM symbols,

21. methods as claimed in claim 15, it is characterized in that, DM-RS RE corresponding to described each DM-RS antenna port, described for transmitting the corresponding PRB pair set of physical resource of DM-RS, the different subcarrier of comprise A numbering of each PRB pair corresponding RE on described one or two OFDM symbol, wherein A is greater than 1 and be less than 12 integer.

22. methods as claimed in claim 21, is characterized in that, in the time supporting maximum 8 DM-RS antenna ports, DM-RS RE corresponding to described each DM-RS antenna port determines as follows:

23. methods as claimed in claim 22, is characterized in that, 8 DM-RS antenna ports are divided into 2 groups, and each grouping comprises 4 DM-RS antenna ports, DM-RS RE corresponding to 4 DM-RS antenna ports in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; The DM-RS RE of the DM-RS antenna port correspondence in each PRB pair using the RE of A subcarrier definite in each PRB pair correspondence on described one or two OFDM symbol in correspondence grouping, specifically comprises:

24. as the method as described in arbitrary in claim 21 ~ 23, it is characterized in that, described terminal is according to the DM-RS resource mapping method of each DM-RS antenna port, each DM-RS antenna port in current subframe obtains for transmitting on the corresponding DM-RS RE on the physical resource of DM-RS the DM-RS that this DM-RS antenna port is corresponding described respectively, specifically comprises:

In the time of integral multiple that A is 4:

25. methods as claimed in claim 22, is characterized in that, 8 DM-RS antenna ports are divided into 4 groups, and each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS days lower port in same grouping; For each grouping, in each PRB pair, determine A the subcarrier that numbering is different, be the definite subcarrier difference of different grouping; A subcarrier definite in each PRB pair corresponding RE DM-RS antenna port in correspondence grouping on described one or two OFDM symbol when corresponding DM-RS RE, is specifically comprised in each PRB pair:

While being mapped to two OFDM symbols as A=3 and by DM-RS:

26. methods as claimed in claim 21, it is characterized in that, in the time supporting maximum 4 DM-RS antenna ports, 4 DM-RS antenna ports are divided into 2 groups, each grouping comprises 2 DM-RS antenna ports, DM-RS RE corresponding to 2 DM-RS antenna ports in same grouping, and determine as follows DM-RS RE corresponding to each DM-RS antenna port:

27. methods as claimed in claim 21, is characterized in that, in the time supporting maximum 2 DM-RS antenna ports, the DM-RS RE that each DM-RS antenna port is corresponding is identical, and determine DM-RS RE corresponding to each DM-RS antenna port as follows:

28. as the method as described in arbitrary in claim 25-27, it is characterized in that, described terminal is according to the DM-RS resource mapping method of each DM-RS antenna port, each DM-RS antenna port in current subframe obtains for transmitting on the corresponding DM-RS RE on the physical resource of DM-RS the DM-RS that this DM-RS antenna port is corresponding described respectively, specifically comprises:

In the time that DM-RS is mapped to two OFDM symbols:

In the time of integral multiple that A is 2:

29. 1 kinds of base stations, is characterized in that, this base station comprises:

30. base stations as claimed in claim 29, is characterized in that, described DM-RS map unit specifically for: for regular circulation prefix CP, the maximum occurrences of determining described N is 6; For expansion CP, the maximum occurrences of determining described N is 5; Or,

31. base stations as claimed in claim 29, it is characterized in that, described DM-RS map unit specifically for: in TDD system, determine that described subframe is the special subframe of corresponding special subframe configuration 9 under conventional CP, or be the special subframe of corresponding special subframe configuration 7 under expansion CP; Or,

32. base stations as claimed in claim 29, is characterized in that, described transmission unit also for:

33. base stations as claimed in claim 29, it is characterized in that, described DM-RS map unit specifically for: in the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, determine that described two OFDM symbols are continuous or discrete OFDM symbol; Or,

34. base stations as claimed in claim 33, it is characterized in that, described DM-RS map unit is further used for: determine that described two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in described subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 1st in described subframe, 2, 4, 5, any two discontinuous OFDM symbols in 6 OFDM symbols,

35. base stations as claimed in claim 29, it is characterized in that, described DM-RS map unit specifically for: determine DM-RS RE corresponding to described each DM-RS antenna port, described for transmitting the corresponding PRB pair set of physical resource of DM-RS, the different subcarrier of comprise A numbering of each PRB pair corresponding RE on described one or two OFDM symbol, wherein A is greater than 1 and be less than 12 integer.

36. base stations as claimed in claim 35, is characterized in that, described DM-RS map unit is further used for:

37. base stations as claimed in claim 36, is characterized in that, in the time that 8 DM-RS antenna ports are divided into 2 groups by described DM-RS map unit, described DM-RS map unit is further used for:

38. as the base station as described in arbitrary in claim 35 ~ 37, it is characterized in that, this base station also comprises:

The first spectrum-spreading unit, in this subframe for transmitting the physical resource of DM-RS, by this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal:

39. base stations as claimed in claim 36, is characterized in that, in the time that 8 DM-RS antenna ports are divided into 4 groups by described DM-RS map unit, described DM-RS map unit is further used for:

40. base stations as claimed in claim 35, is characterized in that, described DM-RS map unit is further used for:

41. base stations as claimed in claim 35, is characterized in that, described DM-RS map unit is further used for:

In the time supporting maximum 2 DM-RS antenna ports, determine that the DM-RS RE that each DM-RS antenna port is corresponding is identical, and determine DM-RSRE corresponding to each DM-RS antenna port as follows:

42. base stations as described in as arbitrary in claim 39 ~ 41, is characterized in that, this base station also comprises:

The second spectrum-spreading unit, in this subframe for transmitting the physical resource of DM-RS, by this subframe for transmitting before the antenna port of DM-RS sends the DM-RS after described resource mapping to terminal:

43. 1 kinds of terminals, is characterized in that, this terminal comprises:

44. terminals as claimed in claim 43, is characterized in that, described DM-RS acquiring unit specifically for: for regular circulation prefix CP, the maximum occurrences of determining described N is 6; For expansion CP, the maximum occurrences of determining described N is 5; Or,

45. terminals as claimed in claim 43, it is characterized in that, described DM-RS acquiring unit specifically for: in TDD system, determine that described subframe is the special subframe of corresponding special subframe configuration 9 under conventional CP, or be the special subframe of corresponding special subframe configuration 7 under expansion CP; Or,

46. terminals as claimed in claim 43, is characterized in that, described DM-RS acquiring unit also for:

47. terminals as claimed in claim 43, it is characterized in that, in the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on two OFDM symbols of synchronous transmission of signal place OFDM symbol, described DM-RS acquiring unit specifically for: determine that described two OFDM symbols are continuous or discrete OFDM symbol; Or,

In the time that DM-RS RE corresponding to described each DM-RS antenna port is the RE being different from the top n OFDM symbol in this subframe on an OFDM symbol of synchronous transmission of signal place OFDM symbol, described DM-RS acquiring unit specifically for: determine that a described OFDM symbol is any one OFDM symbol except the OFDM symbol of synchronous transmission of signal place in described top n OFDM symbol.

48. terminals as claimed in claim 47, it is characterized in that, described DM-RS acquiring unit is further used for: determine that described two OFDM symbols are the 1st OFDM symbol and the 2nd the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 5th the OFDM symbol in described subframe, or be the 5th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 2nd OFDM symbol and the 4th the OFDM symbol in described subframe, or be the 4th OFDM symbol and the 6th the OFDM symbol in described subframe, or be the 1st in described subframe, 2, 4, 5, any two discontinuous OFDM symbols in 6 OFDM symbols,

49. terminals as claimed in claim 43, it is characterized in that, described DM-RS acquiring unit specifically for: determine DM-RS RE corresponding to described each DM-RS antenna port, described for transmitting the corresponding PRB pair set of physical resource of DM-RS, the different subcarrier of comprise A numbering of each PRB pair corresponding RE on described one or two OFDM symbol, wherein A is greater than 1 and be less than 12 integer.

50. terminals as claimed in claim 49, is characterized in that, described DM-RS acquiring unit is further used for:

51. terminals as claimed in claim 50, is characterized in that, in the time that 8 DM-RS antenna ports are divided into 2 groups by described DM-RS acquiring unit, described DM-RS acquiring unit is further used for:

52. as the terminal as described in arbitrary in claim 49-51, it is characterized in that, described DM-RS acquiring unit is used for:

53. terminals as claimed in claim 50, is characterized in that, in the time that 8 DM-RS antenna ports are divided into 4 groups by described DM-RS acquiring unit, described DM-RS acquiring unit is further used for:

54. terminals as claimed in claim 49, is characterized in that, described DM-RS acquiring unit is further used for:

55. terminals as claimed in claim 49, is characterized in that, described DM-RS acquiring unit is further used for:

56. as the terminal as described in arbitrary in claim 53-55, it is characterized in that, described DM-RS acquiring unit is used for: