CN103581095A

CN103581095A - Downlink user dedicated demodulation reference signal transmitting method and device

Info

Publication number: CN103581095A
Application number: CN201310057572.9A
Authority: CN
Inventors: 高雪娟; 林亚男; 丁昱
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-07-24
Filing date: 2013-02-22
Publication date: 2014-02-12
Anticipated expiration: 2033-02-22
Also published as: CN103581094B; CN103581094A; CN103581095B

Abstract

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

Description

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

Technical field

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

Background technology

At Long Term Evolution, strengthen (Long Term Evolution-Advance, LTE-A) on the tradition of system (Legacy) carrier wave, by (the Orthogonal Frequency Division Multiplexing of the OFDM in a descending sub frame, OFDM) symbol is divided into control area and data area two parts, control area is the top n OFDM symbol of 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.The legacy down channel of bearing downlink control information, as Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), Physical Control Format Indicator Channel (Physical Control Format Indicator Channel, PCFICH), Physical HARQ Indicator Channel (Physical Hybrid-ARQ Indicator Channel, PHICH), in control area, transmit; The down channel of bearing downlink data, as Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) can only transmit in data area.Be PDCCH and the transmission of PDSCH time division multiplexing.

The downlink reference signal that in LTE-A system, solution is called mainly comprises cell special reference (Cell-specific reference signals, CRS) and subscriber equipment (User Equipment, UE, also claim terminal equipment) dedicated demodulation reference signal (DeModulation Reference Signal, DM-RS).In LTE-A system, defined 9 kinds of downlink transfer patterns, which kind of transmission mode UE is specifically used pre-configured by high-level signaling.Different downlink reference signals is applicable to different transmission modes.

CRS, for the signal demodulation of transmission mode 1 ~ 6, can support single antenna port transmission (antenna port numbering p=0), two antenna port transmission (antenna port numbering p=0,1) or four antenna ports transmission (antenna port numbering p=0,1,2,3).By 1 Physical Resource Block (Physical Resource Block corresponding to each time slot (slot) difference in a subframe, PRB) be called 1 PRB to (PRB pair), the CRS resource mapping method that the PRB pair of take is unit as shown in Figure 2 a and 2 b, wherein, Fig. 2 a is regular circulation prefix (Cyclic Prefix, CP) mapping mode under, Fig. 2 b is the mapping mode under expansion CP.CRS is in the full bandwidth transmission of carrier wave, and transmission in each subframe.

DM-RS, for the signal demodulation of transmission mode 7 ~ 9, can support 1 ~ 8 antenna port transmission, is configured in respectively antenna port p=5, p=7, and p=8orp=7,8 ..., υ+6, wherein υ is layer (Layer) number of PDSCH transmission.The upper transmission of PRB at the PDSCH transmission place that DM-RS is only 7 ~ 9 in transmission mode, to reduce reference symbol expense, save energy, to reduce the interference between neighbor cell.Under the conventional CP of Fig. 3 a() and Fig. 3 b(expand under CP) be depicted as DM-RS and take a resource mapping method that PRB pair is unit, wherein, the mapping resource of DM-RS on antenna port 7/8/11/13 is identical, and the mapping resource on antenna port 9/10/12/14 is identical.By the time domain orthogonal sequence shown in table 1 and table 2, guarantee to use the orthogonality between the DM-RS on the different antennae port of same map resource.Under expansion CP, DM-RS is not supported in antenna port 9 ~ 14 transmission.In addition for descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS) length in time division duplex (Time Division Duplex, TDD) system, be that (be under descending conventional CP, DwPTS is 6592T for the special subframe of 3 OFDM symbols, _sspecial subframe, under descending expansion CP, DwPTS is 7680T _sspecial subframe, T wherein _sfor system adopts the time interval), i.e. the special subframe of descending conventional CP is used in special subframe configuration for 0 and 5 times, and the special subframe of the 0 and 4 times descending expansion of use CP of special subframe configuration, 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

In order further to improve resource utilization ratio, version-the 11(Rel-11 of LTE-A system, Release11) determine for carrier aggregation (Carrier Aggregation, CA) in system, 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: the legacy down channel that does not transmit PDCCH equivalent-load Downlink Control Information, in order to improve NCT resource utilization, PDSCH can transmit (being the control area in the subframe defining on legacy carrier wave) on top n OFDM symbol, and PDSCH can transmit on all OFDM symbols in a subframe; NCT only supports to use the PDSCH transmission of transmission mode 9, can be undertaken across carrier dispatching by the PDCCH on the legacy carrier wave with NCT polymerization, also can be dispatched by the enhancing Physical Downlink Control Channel on NCT (Enhanced Physical Downlink Control Channel, E-PDCCH); The main distinction of E-PDCCH and legacy PDCCH is, E-PDCCH and the transmission of PDSCH frequency division multiplexing, and therefore, E-PDCCH also can transmit on all OFDM symbols; NCT is only supported in the CRS transmission that the upper 5ms of single antenna port (antenna port p=0) is the cycle, and CRS is only for measuring and following the tracks of, and is not used in demodulation; The down channels such as the E-PDCCH on NCT, PDSCH need be based on DM-RS demodulation.

To sum up, in the DM-RS resource mapping method of Rel-10 definition, DM-RS does not transmit on the OFDM of control area symbol, when the E-PDCCH on NCT and PDSCH are mapped in and transmit on all OFDM symbols in a subframe in time domain, at least the channel estimating informational needs on top n OFDM symbol carries out extrapolation algorithm through the DM-RS of limited row and obtains, and has reduced the data demodulates performance on NCT; And DM-RS is not supported in the special subframe that DwPTS is 3 OFDM symbols and transmits, cause only comprising in the special subframe of 3 OFDM symbols and can not, based on DM-RS transmitting downlink data, reduce the resource utilization of NCT.

Summary of the invention

The embodiment of the present invention provides a kind of transmission method and equipment of downlink user dedicated demodulation reference signal, for improving the data demodulates performance on NCT carrier wave.

A dedicated demodulation reference signal DM-RS transmission method, the method comprises:

Terminal is determined the mapping resource of DM-RS in current subframe according to DM-RS resource mapping method, described DM-RS mapping resource at least comprises the Resource Unit RE at least one the OFDM symbol in the top n orthogonal frequency division multiplex OFDM symbol of current subframe, and N is not less than 1 integer;

Terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe.

The mapping resource of DM-RS in current subframe determined according to DM-RS resource mapping method in base station, described DM-RS mapping resource at least comprises the Resource Unit RE at least one the OFDM symbol in the top n orthogonal frequency division multiplex OFDM symbol of current subframe, and N is not less than 1 integer;

Base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits.

, this terminal comprises:

Resource mapping unit, for determining that according to DM-RS resource mapping method DM-RS is in the mapping resource of current subframe, described DM-RS mapping resource at least comprises the Resource Unit RE at least one the OFDM symbol in the top n orthogonal frequency division multiplex OFDM symbol of current subframe, and N is not less than 1 integer;

Signal acquiring unit, for according to the described DM-RS mapping resource of determining, obtains the DM-RS transmitting in current subframe.

，Gai base station, a kind of base station comprises:

Data transmission unit, for according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits.

In the scheme that the embodiment of the present invention provides, in the control area of subframe, be in top n OFDM symbol, to have the mapping resource of DM-RS, making channel estimating information on top n OFDM symbol to carry out interpolation calculation by the DM-RS transmitting on this N OFDM symbol obtains, avoiding DM-RS through this N of distance in time domain symbol limited row far away to carry out extrapolation algorithm obtains, thereby improved the data demodulates performance of NCT, and guarantee that DwPTS only comprises and in the special subframe of 3 OFDM symbols, also have DM-RS transmission, and then make in these special subframes can transmitting downlink data, thereby efficiency of transmission and the availability of frequency spectrum of NCT have been improved.

Accompanying drawing explanation

Fig. 1 is the multiplexing schematic diagram that is related to of control area and data area in a descending sub frame in prior art;

Fig. 2 a is the CRS resource mapping method schematic diagram under conventional CP in prior art;

Fig. 2 b is the CRS resource mapping method schematic diagram of expanding in prior art under CP;

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;

The method flow schematic diagram that Fig. 4 provides for the embodiment of the present invention;

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

Fig. 6 a ~ Fig. 6 j is the DM-RS resource mapping schematic diagram of the embodiment of the present invention one;

Fig. 7 a ~ Fig. 7 i is the DM-RS resource mapping schematic diagram of the embodiment of the present invention two;

Fig. 8 a ~ Fig. 8 c is the DM-RS resource mapping schematic diagram of the embodiment of the present invention three;

Fig. 9 a ~ Fig. 9 c is the DM-RS resource mapping schematic diagram of the embodiment of the present invention four;

Figure 10 a ~ Figure 10 i is the DM-RS resource mapping schematic diagram of the embodiment of the present invention five;

Figure 11 a ~ Figure 11 d is the DM-RS resource mapping schematic diagram of the embodiment of the present invention six;

Figure 12 a ~ Figure 12 d is the DM-RS resource mapping schematic diagram of the embodiment of the present invention seven;

The device structure schematic diagram that Figure 13 provides for the embodiment of the present invention;

Another device structure schematic diagram that Figure 14 provides for the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of DM-RS transmission method of the NCT of being applicable to carrier wave, in this method, in the control area of subframe, be in top n OFDM symbol, to have the mapping resource of DM-RS, making channel estimating information on top n OFDM symbol to carry out interpolation calculation by the DM-RS transmitting on this N OFDM symbol obtains, avoiding DM-RS through this N of distance in time domain symbol limited row far away to carry out extrapolation algorithm obtains, thereby improved the data demodulates performance of NCT, and guarantee that DwPTS only comprises and in the special subframe of 3 OFDM symbols, also have DM-RS transmission, and then make in these special subframes can transmitting downlink data, thereby efficiency of transmission and the availability of frequency spectrum of NCT have been improved.

Referring to Fig. 4, the DM-RS transmission method for end side that the embodiment of the present invention provides, comprises the following steps:

Step 40: terminal is determined the mapping resource of DM-RS in current subframe according to DM-RS resource mapping method, this DM-RS mapping resource at least comprises the Resource Unit (RE) at least one the OFDM symbol in the top n OFDM symbol of current subframe, and N is not less than 1 integer;

Step 41: terminal is the mapping resource in current subframe according to definite DM-RS, obtains the DM-RS transmitting in current subframe, obtains the DM-RS receiving in definite mapping resource.

In step 40, terminal is determined the mapping resource of DM-RS in current subframe according to DM-RS resource mapping method, and specific implementation can adopt one of following four kinds of methods:

Method one: the DM-RS resource mapping method of definition in the rule of terminal based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe;

The i.e. DM-RS resource mapping method based on each DM-RS antenna port is corresponding in Rel-10, do not changing on the basis of DM-RS resource overhead (neither increasing DM-RS mapping resource), by the position of existing DM-RS mapping resource is moved, for example time domain and/or frequency domain translation, the part DM-RS mapping resource in the subframe that this DM-RS resource mapping method is determined moves on at least 1 OFDM symbol in the top n OFDM symbol of this subframe; Said process can be regarded as to UE obtains the process of the DM-RS resource mapping method of current needs use, and according to RE position corresponding to the DM-RS in this DM-RS resource mapping method, determine DM-RS mapping resource, or also said process itself can be regarded as to the DM-RS method for mapping resource of UE based on defining in Re-10, by predetermined translation, directly obtain DM-RS mapping resource; Wherein DM-RS mapping resource is embodied in the RE of corresponding DM-RS;

Preferably, by the DM-RS mapping resource on the part OFDM in the OFDM that comprises DM-RS mapping resource in a definite subframe of Rel-10DM-RS resource mapping method, through time domain and/or translation, move in the top n OFDM symbol in this

subframe

1 or 2 OFDM symbols, wherein, the mapping of the DM-RS on different OFDM symbols resource moves on the different OFDM symbol in top n OFDM symbol.

Method two: the DM-RS resource mapping method of definition in the rule of terminal based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe,

The DM-RS resource mapping method based on each DM-RS antenna port is corresponding in Rel-10, increases DM-RS mapping resource at least 1 OFDM symbol in the top n OFDM of subframe symbol; Said process can be regarded as to UE obtains the process of the DM-RS resource mapping method of current needs use, and according to RE position corresponding to the DM-RS in this DM-RS resource mapping method, determine DM-RS mapping resource; Or also said process itself can be regarded as to the DM-RS method for mapping resource of UE based on defining in Re-10, by increasing DM-RS resource operation, directly obtain DM-RS mapping resource;

Preferably, based on Rel-10DM-RS resource mapping method, according to the sub-carrier positions at all in this DM-RS resource mapping method or part DM-RS mapping resource place, in a subframe

top n OFDM

1 or 2 adjacent OFDM symbols, increase DM-RS mapping resource.

Method three: terminal is determined DM-RS resource mapping method according to the configuration information carrying in high-level signaling or Physical Downlink Control Channel (PDCCH), and determine that according to described definite DM-RS resource mapping method DM-RS transmits the mapping resource on the antenna port at place in current subframe, wherein, this configuration information is indicated a kind of DM-RS resource mapping method, or indicates in the top n OFDM symbol of a subframe, whether there is DM-RS mapping resource;

Be that terminal is passed through high-level signaling or PDCCH receives configuration information, and according to the concrete indication of this configuration information, determine the actual DM-RS resource mapping method of using, wherein, described configuration information can be indicated concrete a kind of DM-RS resource mapping method, this DM-RS resource mapping method is predefined in system, and UE determines in the system of using described configuration information indication a kind of in predefined multiple DM-RS resource mapping method, or, described configuration information can also indicate in top n OFDM symbol, whether there is DM-RS mapping resource, UE can select to meet according to described configuration information a kind of of configuration indication in system in predefined multiple DM-RS resource mapping method, or when configuration information indication exists, UE is according to the mode (as said method 2) of predetermined move mode (as said method 1) or increase DM-RS resource, on the basis of the DM-RS resource mapping method defining at Rel-10, form the DM-RS resource mapping method of current use, and according to RE position corresponding to the DM-RS in this DM-RS resource mapping method, determine DM-RS mapping resource, or on the basis of the DM-RS resource mapping method defining at Rel-10, directly determine DM-RS mapping resource, when configuration information indication does not exist, UE determines the DM-RS resource mapping method of using Rel-10 definition.

Method four: terminal is according to predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, described predefined DM-RS resource mapping method is at least satisfied: at least 1 OFDM symbol in the top n OFDM of subframe symbol, have DM-RS mapping resource.

It is the DM-RS resource mapping method that terminal does not need further to form needs, the defined DM-RS resource mapping method that meets above-mentioned condition in directly use system, according to RE position corresponding to the DM-RS in this DM-RS resource mapping method, determine DM-RS mapping resource.

Concrete, terminal is determined DM-RS resource mapping method according to the configuration information carrying in high-level signaling or PDCCH, and according to described definite DM-RS resource mapping method, determine the mapping resource of DM-RS in current subframe, specific implementation one of can following four kinds of schemes:

Scheme one: terminal is according to the configuration information carrying in high-level signaling or PDCCH, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe,

Scheme two: terminal is according to the configuration information carrying in high-level signaling or PDCCH, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe,

Scheme three: terminal is according to the configuration information carrying in high-level signaling or PDCCH, from predefined multiple DM-RS resource mapping method, select the indicated a kind of predefined DM-RS resource mapping method of this configuration information, and according to this predefined DM-RS resource mapping method of selecting, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe;

Scheme four: terminal is according to the configuration information carrying in high-level signaling or PDCCH, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, from predefined multiple DM-RS resource mapping method, be chosen in a kind of predefined DM-RS resource mapping method that has DM-RS mapping resource in the top n OFDM symbol of a subframe, and according to this predefined DM-RS resource mapping method of selecting, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe;

Concrete, in said method four or scheme three or scheme four, when terminal is according to predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, predefined DM-RS resource mapping method is specially one of following three kinds of modes:

Mode one: by the translation on time domain and/or frequency domain, by the part RE in the RE set that on each DM-RS antenna port of definition in LTE system version 10 in a subframe, DM-RS is corresponding, move in a subframe at least one the OFDM symbol in the top n OFDM symbol on this antenna port the DM-RS resource mapping method obtaining;

Mode two, DM-RS resource mapping method corresponding to each DM-RS antenna port based on definition in LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in a subframe on this antenna port, increase the RE that DM-RS is corresponding, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe,

Mode three, meet on each the DM-RS antenna port in a subframe, exist the OFDM symbol of DM-RS mapping resource non-conterminous, and exist on the OFDM symbol of DM-RS mapping resource and have at least 1 group DM-RS mapping resource, every group of DM-RS mapping resource is comprised of the RE of at least 2 adjacent sub-carriers numberings of correspondence.

Concrete, adopting said method one or scheme one or mode for the moment, in step 41, terminal is according to definite DM-RS mapping resource, obtain the DM-RS transmitting in current subframe, can reuse the time domain orthogonal frequency expansion sequence corresponding to corresponding DM-RS antenna port of Rel-10 definition DM-RS is separated to spread spectrum, with the orthogonality between the antenna port of assurance use same asset mapping mode, specific implementation can be as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, in the RE that transmission DM-RS is used, 4 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 4 to separate spread spectrum, to obtain the DM-RS transmitting on current antenna port.

Concrete, adopting said method one or scheme one or mode for the moment, in step 41, terminal is according to definite DM-RS mapping resource, obtain the DM-RS transmitting in current subframe, can reuse the time domain orthogonal frequency expansion sequence corresponding to corresponding DM-RS antenna port of Rel-10 definition DM-RS is separated to spread spectrum, to guarantee to use the orthogonality between the antenna port of same asset mapping mode, specific implementation can be as follows:

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, to the DM-RS of the upper transmission of every group of RE, use LTE system version 10 to define, the time domain orthogonal frequency expansion sequence that the length that current DM-RS antenna port is corresponding is 2 is separated spread spectrum, to obtain the DM-RS transmitting on current antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use LTE system version 10 to define, the time domain orthogonal frequency expansion sequence that the length that current DM-RS antenna port is corresponding is 2 is separated spread spectrum, to obtain the DM-RS transmitting on current antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, 2 RE that the transmission DM-RS of the same subcarrier number of correspondence is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 2 to separate spread spectrum, to obtain the DM-RS transmitting on current antenna port; Or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, that transmission DM-RS on each OFDM that comprises DM-RS mapping resource is used and on frequency domain the most adjacent two RE as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 2 to separate spread spectrum, to obtain the DM-RS transmitting on current antenna port.

Concrete, when adopting said method two or scheme two or mode two, in step 41, terminal is according to definite DM-RS mapping resource, obtains the DM-RS transmitting in current subframe, specific implementation can be as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, by on first four the OFDM symbols that comprise the RE that uses of transmission DM-RS, 4 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group, on rear four OFDM symbols that comprise the RE that uses of transmission DM-RS (being the DM-RS of corresponding former Rel-10 resource mapping method or the DM-RS of the DM-RS of corresponding former Rel-10 resource mapping method after out-of-date/frequency domain translation), 4 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group,

To the DM-RS of wherein one group of upper transmission of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 4 to separate spread spectrum, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that is 4 to LTE system version 10 length definition, that current DM-RS antenna port is corresponding to the DM-RS use of the upper transmission of another group RE converts is separated spread spectrum, to obtain the DM-RS transmitting on current antenna port.

Preferably, 1 group of DM-RS in former Rel-10 resource mapping method is used to the orthogonal sequence in former Rel-10,1 group of DM-RS that only part comprises DM-RS in former Rel-10 resource mapping method is used to the orthogonal sequence after conversion, to guarantee the compatibility with legacy terminal.

Preferably, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after conversion is: by after the first two spreading factor and latter two spreading factor switch of LTE system version 10 time domain orthogonal frequency expansion sequences definition, that length is 4, and the time domain orthogonal frequency expansion sequence obtaining; Or,

If increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after conversion is: LTE system version 10 is defined, length is that last spreading factor in 4 time domain orthogonal frequency expansion sequence is as first spreading factor, after other spreading factor orders, move the time domain orthogonal frequency expansion sequence obtaining, or, LTE system version 10 is defined, length is that first spreading factor in 4 time domain orthogonal frequency expansion sequence is as last spreading factor, the time domain orthogonal frequency expansion sequence that other spreading factors sequentially move forward and obtain.

Concrete, when said method two or scheme two or mode two, in step 41, terminal is according to definite DM-RS mapping resource, obtains the DM-RS transmitting in current subframe, specific implementation can be as follows:

For expansion CP, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, by in every two adjacent OFDM symbol in a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to current DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on current antenna port, or,

For expansion CP, if increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, to DM-RS definition in LTE system version 10, that transmit the upper transmission of RE that DM-RS uses on current DM-RS antenna port, mode according to 10 definition of LTE system version is separated spread spectrum, to obtain the DM-RS transmitting on this antenna port; And,

On increase has the OFDM symbol of the RE that uses of transmission DM-RS, 2 RE that on frequency domain, immediate two transmission DM-RS are used are as one group, the DM-RS of every group of upper transmission of RE is used the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding are 2; Or, in the OFDM symbol that increase is had to the RE that uses of transmission DM-RS and LTE system version 10 definition, first comprises on the OFDM symbol that transmits the RE that DM-RS uses, 2 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that it is 2 that the DM-RS of every group of upper transmission of RE is used LTE system version 10 length definition, that current DM-RS antenna port is corresponding converts is separated spread spectrum, to obtain the DM-RS transmitting on this antenna port.

Preferably, the time domain orthogonal frequency expansion sequence obtaining after conversion can be: after two spreading factor switches in the time domain orthogonal frequency expansion sequence that is 2 by the length of LTE system version 10 definition, and the time domain orthogonal frequency expansion sequence that the length obtaining is 2.

Concrete, when adopting aforesaid way three, in step 41, terminal, according to definite DM-RS mapping resource, is obtained the DM-RS transmitting in current subframe, and specific implementation can be as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, by on a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 4 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port.

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, by on each the OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port.

In this method, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.

When current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or when current subframe is special subframe, N is no more than 2 or 3 positive integer.

The mutual holistic approach flow process in terminal and base station is as follows:

Step 1: the mapping resource of DM-RS in current subframe determined according to DM-RS resource mapping method in base station, DM-RS mapping resource at least comprises the RE at least one the OFDM symbol in the top n OFDM symbol of current subframe, N is not less than 1 integer;

Step 2: base station, according to definite DM-RS mapping resource, is mapped to DM-RS in current subframe and transmits;

Step 3: terminal is determined the mapping resource of DM-RS in current subframe according to DM-RS resource mapping method, DM-RS mapping resource at least comprises the RE at least one the OFDM symbol in the top n OFDM symbol of current subframe, N is not less than 1 integer;

Step 4: terminal, according to definite DM-RS mapping resource, is obtained the DM-RS transmitting in current subframe.

Need to guarantee that the DM-RS resource mapping method of using base station is consistent with the DM-RS resource mapping method of terminal use.

Referring to Fig. 5, the DM-RS transmission method for base station side that the embodiment of the present invention provides, comprises the following steps:

Step 50: the mapping resource of DM-RS in current subframe determined according to DM-RS resource mapping method in base station, DM-RS mapping resource at least comprises the RE at least one the OFDM symbol in the top n OFDM symbol of current subframe, N is not less than 1 integer;

Step 51: base station, according to definite DM-RS mapping resource, is mapped to DM-RS in current subframe and transmits, at definite DM-RS mapping transmitted over resources DM-RS.

In step 50, the mapping resource of DM-RS in current subframe determined according to DM-RS resource mapping method in base station, and specific implementation can adopt one of following four kinds of methods:

Method one: the DM-RS resource mapping method of definition in the rule of base station based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe;

Method two: the DM-RS resource mapping method of definition in the rule of base station based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe,

A kind of method three: base station is determined DM-RS resource mapping method according to actual needs, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or physical downlink control channel PDCCH, this configuration information is indicated a kind of DM-RS resource mapping method, or indicates in the top n OFDM symbol of a subframe, whether there is DM-RS mapping resource;

Method four: base station is according to predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, this predefined DM-RS resource mapping method is at least satisfied: at least 1 OFDM symbol in the top n OFDM of subframe symbol, have DM-RS mapping resource.

Concrete, base station is determined a kind of DM-RS resource mapping method according to actual needs, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or PDCCH, specific implementation one of can following three kinds of schemes:

Scheme one: base station according to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information (being specifically designated as existence) that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe,

Scheme two: base station according to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information (being specifically designated as existence) that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe,

Scheme three: base station is selected a kind of predefined DM-RS resource mapping method according to actual needs from predefined multiple DM-RS resource mapping method, according to this predefined DM-RS resource mapping method of selecting, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send the configuration information of a kind of predefined DM-RS resource mapping method that is used to indicate selection by high-level signaling or PDCCH, or to terminal, send by high-level signaling or PDCCH the configuration information (being specifically designated as existence) that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe.

Concrete, when base station is according to predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the in the following manner definition of predefined DM-RS resource mapping method:

Mode two: DM-RS resource mapping method corresponding to each DM-RS antenna port based on definition in LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in a subframe on this antenna port, increase the RE that DM-RS is corresponding, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe,

Mode three: meet on each the DM-RS antenna port in a subframe, exist the OFDM symbol of DM-RS mapping resource non-conterminous, and the DM-RS that existence at least 1 group on described OFDM symbol is comprised of the RE of at least 2 adjacent sub-carriers numberings of correspondence shine upon resource.

Concrete, adopting said method one or scheme one or mode for the moment, in step 51, base station, according to definite DM-RS mapping resource, is mapped to DM-RS in current subframe and transmits, and specific implementation can be as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, in the RE that transmission DM-RS is used, 4 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 4 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, to the DM-RS of the upper transmission of every group of RE, use LTE system version 10 to define, the time domain orthogonal frequency expansion sequence that the length that current DM-RS antenna port is corresponding is 2 carries out spread spectrum, to transmit DM-RS on this antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use LTE system version 10 to define, the time domain orthogonal frequency expansion sequence that the length that current DM-RS antenna port is corresponding is 2 carries out spread spectrum, to transmit DM-RS on this antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, 2 RE that the transmission DM-RS of the same subcarrier number of correspondence is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 2 to carry out spread spectrum, to transmit DM-RS on this antenna port; Or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, that transmission DM-RS on each OFDM that comprises DM-RS mapping resource is used and on frequency domain the most adjacent two RE as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 2 to carry out spread spectrum, to transmit DM-RS on this antenna port.

Concrete, when adopting said method two or scheme two or mode two, in step 51, base station, according to definite DM-RS mapping resource, is mapped to DM-RS in current subframe and transmits, and specific implementation can be as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, by on first four the OFDM symbols that comprise the RE that uses of transmission DM-RS, 4 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group, on rear four OFDM symbols that comprise the RE that uses of transmission DM-RS, 4 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group;

To the DM-RS of wherein one group of upper transmission of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to carry out spread spectrum, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that is 4 to LTE system version 10 length definition, that current DM-RS antenna port is corresponding to the DM-RS use of the upper transmission of another group RE converts carries out spread spectrum, to transmit described DM-RS on this antenna port.

Preferably, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: by after the first two spreading factor and latter two spreading factor switch of LTE system version 10 time domain orthogonal frequency expansion sequences definition, that length is 4, and the time domain orthogonal frequency expansion sequence obtaining; Or,

If increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: LTE system version 10 is defined, length is that last spreading factor in 4 time domain orthogonal frequency expansion sequence is as first spreading factor, after other spreading factor orders, move the time domain orthogonal frequency expansion sequence obtaining, or, LTE system version 10 is defined, length is that first spreading factor in 4 time domain orthogonal frequency expansion sequence is as last spreading factor, the time domain orthogonal frequency expansion sequence that other spreading factors sequentially move forward and obtain.

Concrete, when adopting above-mentioned side two or scheme two or mode two, in step 51, base station, according to definite DM-RS mapping resource, is mapped to DM-RS in current subframe and transmits, and specific implementation can be as follows:

For expansion CP, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, by in every two adjacent OFDM symbol in a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use LTE system version 10 to define, the time domain orthogonal frequency expansion sequence that the length that current DM-RS antenna port is corresponding is 2 carries out spread spectrum, to transmit DM-RS on this antenna port, or,

For expansion CP, if increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, to DM-RS definition in LTE system version 10, that transmit the upper transmission of RE that DM-RS uses on current DM-RS antenna port, mode according to 10 definition of LTE system version is carried out spread spectrum, to transmit DM-RS on this antenna port; And,

On increase has the OFDM symbol of the RE that uses of transmission DM-RS, 2 RE that on frequency domain, immediate two transmission DM-RS are used are as one group, the DM-RS of every group of upper transmission of RE is used the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding are 2; Or, in the OFDM symbol that increase is had to the RE that uses of transmission DM-RS and LTE system version 10, first of definition comprises on the OFDM symbol that transmits the RE that DM-RS uses, 2 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that it is 2 that the DM-RS of every group of upper transmission of RE is used LTE system version 10 length definition, that current DM-RS antenna port is corresponding converts carries out spread spectrum, to transmit DM-RS on this antenna port.

Preferably, the time domain orthogonal frequency expansion sequence obtaining after conversion is: by after two spreading factor switches in LTE system version 10 time domain orthogonal frequency expansion sequence definition, that length is 2, and the time domain orthogonal frequency expansion sequence that the length obtaining is 2.

Concrete, when adopting aforesaid way three, in step 51, base station, according to definite DM-RS mapping resource, is mapped to DM-RS in current subframe and transmits, and specific implementation can be as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, by on a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 4 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 4 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, by on each the OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that LTE system version 10 length definition, that current DM-RS antenna port is corresponding is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

In this method, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.When current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or when current subframe is special subframe, N is no more than 2 positive integer or is no more than 3 positive integer.

Preferably, for the TDD special subframe configuration of not supporting DM-RS transmission in Rel-10, for example, during descending conventional CP, TDD

special subframe configuration

0 and 5, during descending expansion CP, TDD

special subframe configuration

0 and 4, can be used the arbitrary TDD special subframe obtaining in the manner described above to configure corresponding DM-RS resource mapping method, only in the OFDM symbol of DwPTS place, according to DM-RS resource mapping method, sends or receive DM-RS.

Preferably, while there is CRS transmission on NCT, the DM-RS resource mapping method in the present invention should be avoided the OFDM symbol and the OFDM Overlapping Symbol that comprises CRS mapping resource at DM-RS mapping resource place as far as possible; While there is synchronous transmission of signal on NCT, above-mentioned DM-RS resource mapping method should be avoided the DM-RS mapping OFDM symbol at resource place and the OFDM Overlapping Symbol at synchronizing signal map transmission place as far as possible.

High-level signaling in the present invention can be that media access control (MAC, Media Access Control) signaling or Radio Resource are controlled (RRC, Radio Resource Control) signaling etc.; PDCCH signaling can be legacy PDCCH signaling or E-PDCCH signaling etc.The antenna port of transmission DM-RS in the present invention can be antenna port 7 ~ 14.

Below in conjunction with specific embodiment, the present invention will be described:

Embodiment mono-: corresponding said method one or scheme one or mode one;

For conventional descending sub frame (i.e. descending sub frame except TDD special subframe), by the DM-RS mapping resource in the DM-RS resource mapping method of respective antenna port in Rel-10, through time domain translation, obtain the DM-RS resource mapping method as shown in Fig. 6 a to Fig. 6 j;

For example: mode 1: first two columns DM-RS mapping resource in Rel-10 is moved to the 2nd and the 3rd OFDM symbol (or the 3rd and the 4th OFDM symbol) upper, obtain under the conventional CP of Fig. 6 a() and Fig. 6 b(expand under CP);

Mode 2: last row DM-RS mapping resource in Rel-10 is moved to the 2nd OFDM symbol (or the 3rd OFDM symbol) upper, obtain under the conventional CP of Fig. 6 c() and Fig. 6 d(expand under CP);

Mode 3: first two columns DM-RS mapping resource in Rel-10 is moved on the 1st and the 2nd OFDM symbol (or the 2nd and the 3rd OFDM symbol), and last two row DM-RS mapping resources are moved on the 2nd and the 3rd OFDM symbol reciprocal, obtain under the conventional CP of Fig. 6 e() and Fig. 6 f(expand under CP);

Mode 4: first two columns DM-RS mapping resource in Rel-10 is moved to the 2nd and the 3rd OFDM symbol (or the 1st and the 2nd OFDM symbol, or the 3rd and the 4th OFDM symbol), and it is upper that last two row DM-RS mapping resources are moved to the 4th and the 5th OFDM symbol reciprocal (or the 5th and the 6th OFDM symbol reciprocal), obtains under the conventional CP of Fig. 6 g() and Fig. 6 h(expand under CP);

Mode 5: first two columns DM-RS mapping resource in Rel-10 is moved to the 2nd and the 3rd OFDM symbol (or the 1st and the 2nd OFDM symbol, or the 3rd and the 4th OFDM symbol), and last two row DM-RS mapping resources are moved to respectively on the 4th and the 2nd OFDM symbol reciprocal, obtain under the conventional CP of Fig. 6 i() and Fig. 6 j(expand under CP).

Mode 1 can avoid synchronizing signal and the DM-RS resource in FDD system overlapping.

Mode 2 can avoid synchronizing signal and the DM-RS resource in TDD system overlapping.

While there is not CRS on hypothesis NCT, mode 3 can avoid synchronizing signal and the DM-RS resource in FDD and TDD system overlapping simultaneously, or while existing CRS and CRS different from synchronous transmission of signal subframe on hypothesis NCT, definable is occupation mode 3 in synchronous transmission of signal subframe, and other subframes can be used other modes or method.

Mode 4 and mode 5 can avoid synchronizing signal and the DM-RS resource in FDD and TDD system overlapping simultaneously, but on NCT, have CSI-RS when transmission, need the mapping resource of restriction CSI-RS on the OFDM symbol of DM-RS place.

During time domain orthogonal spread spectrum:

For conventional CP, by in DM-RS resource mapping method, in a descending sub frame, the DM-RS of corresponding same subcarrier number, as one group, reuses to every group of DM-RS the time domain orthogonal frequency expansion sequence (i.e. sequence in table 1) that in Rel-10, corresponding length corresponding to DM-RS antenna port is 4;

For expansion CP, by in DM-RS resource mapping method, on the OFDM symbol that in a descending sub frame, the first two comprises DM-RS, the DM-RS of corresponding same subcarrier number is as one group, on the OFDM symbol that latter two comprises DM-RS, the DM-RS of corresponding same subcarrier number, as one group, reuses to every group of DM-RS the time domain orthogonal frequency expansion sequence (i.e. sequence in table 2) that in Rel-10, corresponding length corresponding to DM-RS antenna port is 2, or, by in DM-RS resource mapping method, on the OFDM symbol that in a descending sub frame, the first two comprises DM-RS, the DM-RS of corresponding adjacent sub-carrier numbering is as one group, on the OFDM symbol that latter two comprises DM-RS, the DM-RS of corresponding adjacent sub-carrier numbering is as one group, every group of DM-RS reused to the time domain orthogonal frequency expansion sequence (i.e. sequence in table 2) that in Rel-10, corresponding length corresponding to DM-RS antenna port is 2, for example, for Fig. 6 d, on the OFDM symbol that the first two is comprised to DM-RS, corresponding subcarrier number is i and i+1(for example k1 and k2) DM-RS as one group, use the sequence in table 2, or, by in DM-RS resource mapping method, in a descending sub frame, the DM-RS of corresponding same subcarrier number is as one group, every group of DM-RS reused to the time domain orthogonal frequency expansion sequence (i.e. sequence in table 2) that in Rel-10, corresponding length corresponding to DM-RS antenna port is 2, for example, for Fig. 6 d, on the OFDM symbol that first and last are comprised to DM-RS, the DM-RS of corresponding same subcarrier number is as one group, using the DM-RS of corresponding same subcarrier number on second and the 3rd OFDM symbol that comprises DM-RS as one group, to every group of sequence of using in table 2, or, by in described DM-RS resource mapping method, DM-RS in a descending sub frame on same OFDM on frequency domain adjacent two DM-RS as one group, every group of DM-RS reused to the time domain orthogonal frequency expansion sequence (i.e. sequence in table 2) that in Rel-10, corresponding length corresponding to DM-RS antenna port is 2, the method goes for the OFDM symbol of all DM-RS of comprising, or be only applicable to the OFDM symbol of discrete DM-RS of comprising, for two adjacent OFDM symbols that comprise DM-RS, in time domain direction, divide into groups according to the method described above, for example, for Fig. 6 d, DM-RS on the OFDM symbol that only first and last is comprised to DM-RS is in frequency domain packet, to the 2nd and the 3rd OFDM symbol that comprises DM-RS at time domain grouping,

Embodiment bis-: corresponding said method one or scheme one or mode one;

For TDD special subframe, the DM-RS mapping resource by the DM-RS resource mapping method of respective antenna port in Rel-10, through time domain translation, obtains the DM-RS resource mapping method as shown in Fig. 7 a to Fig. 7 i;

For example,, during conventional CP: mode 1: first two columns DM-RS mapping resource in Rel-10 is moved to the 1st and the 2nd OFDM symbol, obtain Fig. 7 a;

Mode 2: first two columns DM-RS mapping resource in Rel-10 is moved to the 1st and the 2nd OFDM symbol, and for special subframe configuration 1/2/6/7, will rear two row DM-RS shine upon resources 2 OFDM symbols of translation (or backward 1 OFDM symbol of translation) backward, obtain Fig. 7 b;

Mode 3: first two columns DM-RS mapping resource in Rel-10 is moved to the 2nd and the 3rd OFDM symbol, obtain Fig. 7 c;

During expansion CP: mode 1: first row DM-RS mapping resource in Rel-10 is moved to the 1st OFDM symbol (or also can move on to the 2nd or the 3rd OFDM symbol), obtain Fig. 7 d;

Mode 2: first row DM-RS mapping resource in Rel-10 is moved to the 1st OFDM symbol, and by secondary series DM-RS mapping resource 2 OFDM symbols of translation (or backward 1 OFDM symbol of translation) backward, obtain Fig. 7 e;

Mode 3: first row DM-RS mapping resource in Rel-10 is moved to the 2nd OFDM symbol, and secondary series DM-RS is shone upon to resource 2 OFDM symbols of translation backward, obtain Fig. 7 f;

While there is not CRS in the upper special subframe of hypothesis NCT, the mode 1 during conventional CP and mode 2, the mode 1 during expansion CP can avoid synchronizing signal and DM-RS resource in FDD system overlapping;

During time domain orthogonal spread spectrum: during conventional CP, can be using the DM-RS on the RE of the same subcarrier number of correspondence on two OFDM symbols that comprise DM-RS adjacent in the time domain in a subframe as 1 group, the time domain orthogonal frequency expansion sequence that is 2 to every group of length corresponding to corresponding DM-RS antenna port of reusing Rel-10 definition, i.e. sequence in table 2, to guarantee to use the orthogonality between the antenna port of same asset mapping mode; Antenna port 7/8/11/13 in Fig. 7 a for example, the DM-RS on OFDM numbering l=0 and 1 two symbols on two RE of corresponding k=k1 is 1 group, and the DM-RS on two RE of corresponding k=k6 is 1 group, and the DM-RS on two RE of corresponding k=k11 is 1 group; During expansion CP, using the DM-RS on the RE of the same subcarrier number of correspondence on two in the subframe OFDM symbols that comprise DM-RS as 1 group, the time domain orthogonal frequency expansion sequence that is 2 to every group of length corresponding to corresponding DM-RS antenna port of reusing Rel-10 definition, i.e. sequence in table 2; For example in Fig. 7 d, on OFDM numbering l=0 and 5 two symbols, the DM-RS on two RE of corresponding k=k1 is 1 group, DM-RS on two RE of corresponding k=k4 is 1 group, DM-RS on two RE of corresponding k=k7 is 1 group, and the DM-RS on two RE of corresponding k=k10 is 1 group.

It should be noted that, in above-described embodiment one and embodiment bis-, if further introduce frequency domain translation, for example on frequency domain to high frequency or A subcarrier of low frequency part translation, in figure, each k represents a subcarrier number, is also contained in the method, for example, on the basis of above-mentioned Fig. 6 d, further carry out frequency domain translation, obtain the method for mapping resource as shown in Fig. 7 g to Fig. 7 i.

Embodiment tri-: corresponding said method two or scheme two or mode two;

For conventional descending sub frame, when descending conventional CP, according to the sub-carrier positions at DM-RS mapping resource place in the DM-RS resource mapping method of respective antenna port in Rel-10, in a subframe, on the 2nd and the 3rd OFDM symbol, increase DM-RS mapping resource, obtain DM-RS resource mapping method as shown in Figure 8 a;

When descending expansion CP, according to comprising the first two of DM-RS mapping resource or the sub-carrier positions at the mapping of the DM-RS on latter two OFDM symbol resource place in the DM-RS resource mapping method of respective antenna port in Rel-10, in a subframe, on the 2nd and the 3rd OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Fig. 8 b or Fig. 8 c; Or on also can the 1st and the 2nd OFDM symbol in a subframe, or on the 3rd and the 4th OFDM symbol, increase in the manner described above DM-RS mapping resource.

During time domain orthogonal spread spectrum: for Fig. 8 a, on numbering l=1,2,5,6 OFDM symbol in first time slot, the DM-RS of corresponding same subcarrier number is as one group, 4 DM-RS in every group are used to the orthogonal sequence after the evolution shown in table 3, in numbering l=5,6 OFDM symbol and second time slot in first time slot, number the DM-RS of corresponding same subcarrier number on l=5,6 OFDM symbol as another group, 4 DM-RS in every group are used the orthogonal spreading sequence in Rel-10; For Fig. 8 b, Fig. 8 c, two adjacent OFDM symbol (are the OFDM symbol of numbering l=1 and 2 in first time slot, number the OFDM symbol of l=4 and 5, in second time slot, numbering the OFDM symbol of l=4 and 5) DM-RS of upper corresponding same subcarrier number is respectively one group, the orthogonal spreading sequence in 2 DM-RS symbol use tables 2 in every group.

Table 3: under conventional CP, the DM-RS orthogonal sequence of different antennae port

Embodiment tetra-: corresponding said method two or scheme two or mode two;

For conventional descending sub frame, when descending conventional CP, according to the sub-carrier positions at DM-RS mapping resource place in the DM-RS resource mapping method of respective antenna port in Rel-10, in a subframe, on the 2nd OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Fig. 9 a;

When descending expansion CP, according to comprising the first two of DM-RS mapping resource or the sub-carrier positions at the mapping of the DM-RS on latter two OFDM symbol resource place in the DM-RS resource mapping method of respective antenna port in Rel-10, in a subframe, on the 2nd OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Fig. 9 b or Fig. 9 c; Or, also can be in a subframe on the 1st or the 3rd or the 4th OFDM symbol, increase in the manner described above DM-RS mapping resource.

Time domain orthogonal spread spectrum: for Fig. 9 a, in first time slot, number the DM-RS of corresponding same subcarrier number on the OFDM symbol of numbering l=5 in l=1,5,6 OFDM and second time slot as one group, in first time slot, numbering the DM-RS that numbers corresponding same subcarrier number on l=5,6 OFDM symbol in l=5,6 OFDM symbol and second time slot is another group, the sequence in 4 DM-RS symbol use tables 4 in every group, for Fig. 9 b, Fig. 9 c, for former Rel-10DM-RS mapping resource, according to the packet mode in Rel-10, reuse the corresponding orthogonal spreading sequence in Rel-10, be about to number l=4 in first time slot, on 5 OFDM symbol, the DM-RS of corresponding same sub-carrier numbering is divided into one group, to in second time slot, number l=4, on 5 OFDM symbol, the DM-RS of corresponding same sub-carrier numbering is divided into one group, respectively 2 DM-RS in every group are used to the sequence in tables 2, for the DM-RS on the OFDM symbol of the l=1 in first time slot, on frequency domain, be divided between two one group, for example in Fig. 9 c, the DM-RS of corresponding k=k2 and k=k5 is 1 group, the DM-RS of corresponding k=k8 and k=k11 is 1 group, 2 DM-RS in every group are used the sequence in table 2, or, for Fig. 9 b, the DM-RS of corresponding same sub-carrier numbering on the numbering l=1 in first time slot, 4 OFDM symbol is divided into one group, 2 DM-RS in every group are used to the orthogonal sequence after the evolution shown in table 5, the DM-RS that numbers corresponding same sub-carrier numbering on l=4,5 OFDM symbol in first time slot is divided into one group, the DM-RS that numbers corresponding same sub-carrier numbering on l=4,5 OFDM symbol in second time slot is divided into one group, 2 DM-RS in every group are used to the sequence in Rel-10.

Table 4: under conventional CP, the DM-RS orthogonal sequence of different antennae port

Table 5: under expansion CP, the DM-RS orthogonal sequence of different antennae port

Embodiment five: corresponding said method two or scheme two or mode two;

For TDD special subframe, when descending expansion CP, according to the sub-carrier positions at DM-RS mapping resource place in the DM-RS resource mapping method of respective antenna port in Rel-10, in a subframe, on the 1st and the 2nd OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Figure 10 a, or in a subframe, on the 2nd and the 3rd OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Figure 10 b, or in a subframe, on the 1st OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Figure 10 c, or in a subframe, on the 2nd OFDM symbol, increase DM-RS mapping resource, obtain the DM-RS resource mapping method (also can increase in the manner described above DM-RS mapping resource on the 3rd OFDM symbol) as shown in Figure 10 d, or, above-mentioned according to Rel-10 in the sub-carrier positions at DM-RS mapping resource place in the DM-RS resource mapping method of respective antenna port, in a subframe, on the 1st and the 2nd OFDM symbol, increase on the basis of the DM-RS pattern obtaining after DM-RS mapping resource, further DM-RS mapping resource in the DM-RS resource mapping method of respective antenna port in Rel-10 is carried out to the translation of time domain/frequency domain, for example the DM-RS of respective antenna port in former Rel-10 is shone upon to resource to two OFDM symbols of right translation, obtain the DM-RS resource mapping method as shown in Figure 10 e, or,

For TDD special subframe, when descending expansion CP, in a subframe on the 1st and the 2nd OFDM symbol with respect to Rel-10 in the DM-RS sub-carrier positions of respective antenna port on frequency domain upwards the frequency domain position of 1 subcarrier unit of translation increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Figure 10 f, or in a subframe on the 1st and the 2nd OFDM symbol with respect to Rel-10 in the frequency domain position of the DM-RS sub-carrier positions of respective antenna port 1 subcarrier unit of translation downwards on frequency domain increase DM-RS mapping resource, obtain the DM-RS resource mapping method as shown in Figure 10 g, or,

For TDD special subframe, when descending expansion CP, in a subframe on the 1st and the 2nd OFDM symbol with respect to Rel-10 in the DM-RS sub-carrier positions of respective antenna port on frequency domain upwards the frequency domain position of 1 subcarrier unit of translation increase DM-RS mapping resource, and further the DM-RS of respective antenna port in former Rel-10 is shone upon to resource to two OFDM symbols of right translation, obtain the DM-RS resource mapping method as shown in Figure 10 h, or in a subframe on the 1st and the 2nd OFDM symbol with respect to Rel-10 in the DM-RS sub-carrier positions of respective antenna port on frequency domain downwards on the frequency domain position of 1 subcarrier unit of translation increase DM-RS mapping resource, and further the DM-RS of respective antenna port in former Rel-10 is shone upon to resource to two OFDM symbols of right translation, obtain the DM-RS resource mapping method as shown in Figure 10 i.

During time domain orthogonal spread spectrum: for former Rel-10DM-RS mapping resource, according to the packet mode in Rel-10, reuse the corresponding orthogonal spreading sequence in Rel-10, be that the DM-RS that numbers corresponding same sub-carrier numbering on l=4,5 OFDM symbol in first time slot is divided into one group, use the orthogonal spreading sequence that the length in Rel-10 is 2, for Figure 10 a or Figure 10 b or Figure 10 e or Figure 10 f or Figure 10 g, newly increase the DM-RS of corresponding same subcarrier number on the numbering l=0 of DM-RS mapping resource and the OFDM symbol of 1 OFDM symbol or l=1 and 2 as one group, 2 DM-RS symbols in every group are used the orthogonal spreading sequence that the length in Rel-10 is 2, for the DM-RS on the 1st or the 2nd the OFDM symbol of Figure 10 c and Figure 10 d increase DM-RS, on frequency domain, be divided between two one group, for example the DM-RS of corresponding k=k1 and k=k4 is 1 group, the DM-RS of corresponding k=k7 and k=k10 is 1 group, 2 DM-RS in every group are used the sequence in table 2, or, to in first time slot, number l=0, 4 OFDM symbol (corresponding diagram 10c) or numbering l=1, the DM-RS of 4 the upper corresponding same sub-carrier numbering of OFDM symbol (corresponding diagram 10d) is divided into one group, 2 DM-RS in every group are used the orthogonal sequence after the evolution shown in table 5, to in first time slot, number l=4, on 5 OFDM symbol, the DM-RS of corresponding same sub-carrier numbering is divided into one group, 2 DM-RS in every group are used the orthogonal spreading sequence that the length in Rel-10 is 2.

Embodiment six: corresponding aforesaid way three;

For conventional descending sub frame, can use the DM-RS resource mapping method shown in Figure 11 a ~ Figure 11 d; Or, also can be according to the same frequency position in diagram, on second-to-last OFDM symbol or the 1st or the 2nd or the 3rd OFDM symbol in second time slot in the 1st or the 3rd OFDM symbol in first time slot (conventional CP can also on the 4th OFDM symbol of first time slot), second time slot, (conventional CP can also on the 4th OFDM symbol of second time slot) places DM-RS mapping resource.

During time domain orthogonal spread spectrum: for Figure 11 a, using the DM-RS of two subcarrier number corresponding adjacent on two OFDM symbols that comprise DM-RS in a subframe as one group, for example, for antenna port 7/8/11/13, in first time slot, numbering on the OFDM symbol of l=1 and in second time slot, numbering corresponding subcarrier number on the OFDM symbol of l=5 is that the DM-RS of k2 and k3 is as 1 group, for antenna port 9/10/12/14, in first time slot, numbering on the OFDM symbol of l=1 and in second time slot, numbering corresponding subcarrier number on the OFDM symbol of l=5 is that the DM-RS of k0 and k1 is as 1 group, orthogonal spreading sequence in 4 DM-RS symbol use tables 1 in every group, for Figure 11 b ~ Figure 11 d, using the DM-RS of two subcarrier number corresponding adjacent on each the OFDM symbol that comprises DM-RS in a subframe as one group, for example, in Figure 11 c, in first time slot, number corresponding subcarrier number on the OFDM symbol of l=1 and be the DM-RS of k1 and k2 as 1 group, orthogonal spreading sequence in 2 DM-RS symbol use tables 2 in every group, or, for Figure 11 b and Figure 11 c, using the DM-RS of corresponding same sub-carrier numbering on two OFDM symbols that comprise DM-RS in a subframe as one group, for example, in Figure 11 c, in first time slot, number on the OFDM symbol of l=1 and in second time slot, number DM-RS that on the OFDM symbol of l=4, corresponding subcarrier number is k1 as 1 group, orthogonal spreading sequence in 2 DM-RS symbol use tables 2 in every group.

This scheme can avoid synchronizing signal and the DM-RS resource in FDD and TDD system overlapping simultaneously.

Embodiment seven: corresponding aforesaid way three;

For TDD special subframe, can use the DM-RS resource mapping method shown in Figure 12 a ~ Figure 12 d; Or, also can be according to the same frequency position in diagram, last in the 1st OFDM symbol in first time slot (conventional CP can also on the 4th OFDM symbol of first time slot), first time slot or penultimate OFDM symbol are placed DM-RS mapping resource.

Conventional descending sub frame in time domain orthogonal spread spectrum and above-described embodiment six is similar.

Especially, the TDD special subframe under special subframe configuration 9, is used the TDD special subframe defining in said method to configure the DM-RS resource mapping method of 8 correspondences, and only in OFDM assemble of symbol corresponding to the DwPTS of this special subframe, has DM-RS transmission.

The use that can combine with DM-RS expense reduction scheme of above-mentioned DM-RS resource mapping method, can pass through treaty rule or high-rise configuration information, DM-RS resource mapping method or above-mentioned DM-RS resource mapping method that choice for use expense reduces, the DM-RS resource mapping method that wherein expense reduces also can be carries out to the DM-RS resource mapping method in this patent according to make an appointment rule or high-rise configuration information that time domain and/or frequency domain brachymemma obtain.

Referring to Figure 13, the embodiment of the present invention provides a kind of terminal, and this terminal comprises:

Resource mapping unit 70, for determining that according to DM-RS resource mapping method DM-RS is in the mapping resource of current subframe, described DM-RS mapping resource at least comprises the Resource Unit RE at least one the OFDM symbol in the top n orthogonal frequency division multiplex OFDM symbol of current subframe, and N is not less than 1 integer;

Signal acquiring unit 71, for according to the described DM-RS mapping resource of determining, obtains the DM-RS transmitting in current subframe.

Further, described resource mapping unit 70 for: one of as follows according to DM-RS resource mapping method, determine that DM-RS is in the mapping resource of current subframe:

Method one: the DM-RS resource mapping method of definition in the rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe; Or,

Method two: the DM-RS resource mapping method of definition in the rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe, or,

Method three: according to the configuration information carrying in high-level signaling or physical downlink control channel PDCCH, determine DM-RS resource mapping method, and determine that according to described definite DM-RS resource mapping method DM-RS transmits the mapping resource on the antenna port at place in current subframe, wherein said configuration information is indicated a kind of DM-RS resource mapping method, or indicates in the top n OFDM symbol of a subframe, whether there is DM-RS mapping resource; Or,

Method four: according to predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, described predefined DM-RS resource mapping method at least meets and at least 1 OFDM symbol in the top n OFDM of subframe symbol, has DM-RS mapping resource.

Further, described resource mapping unit 70 for: one of as follows according to the configuration information being carried by high-level signaling or PDCCH, determine DM-RS resource mapping method, and determine the mapping resource of DM-RS in current subframe according to described definite DM-RS resource mapping method:

According to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe, or,

According to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe, or,

According to described configuration information, from predefined multiple DM-RS resource mapping method, select the indicated a kind of predefined DM-RS resource mapping method of described configuration information, and according to described predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe; Or,

According to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, from predefined multiple DM-RS resource mapping method, be chosen in a kind of predefined DM-RS resource mapping method that has DM-RS mapping resource in the top n OFDM symbol of a subframe, and according to described predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe.

Further, when described resource mapping unit 70 is according to described predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the as follows definition of described predefined DM-RS resource mapping method:

Mode one: by the translation on time domain and/or frequency domain, by the part RE in the RE set that on each DM-RS antenna port of definition in LTE system version 10 in a subframe, DM-RS is corresponding, move in a subframe at least one the OFDM symbol in the top n OFDM symbol on this antenna port the DM-RS resource mapping method obtaining; Or,

Mode two, DM-RS resource mapping method corresponding to each DM-RS antenna port based on definition in LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in a subframe on this antenna port, increase the RE that DM-RS is corresponding, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or,

Mode three, meet on each the DM-RS antenna port in a subframe, exist the OFDM symbol of DM-RS mapping resource non-conterminous, and the DM-RS that existence at least 1 group on described OFDM symbol is comprised of the RE of at least 2 adjacent sub-carriers numberings of correspondence shine upon resource.

Further, described signal acquiring unit 71 for: adopting described method for the moment, according to the described DM-RS mapping resource of determining, obtaining the DM-RS transmitting in current subframe as follows:

For regular circulation prefix CP, in current subframe, DM-RS transmits on each antenna port at place, in the RE that transmission DM-RS is used, 4 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port.

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, 2 RE that the transmission DM-RS of the same subcarrier number of correspondence is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port; Or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, that transmission DM-RS on each OFDM that comprises DM-RS mapping resource is used and on frequency domain the most adjacent two RE as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port.

Further, described signal acquiring unit 71 for: when adopting described method two, according to the described DM-RS mapping resource of determining, obtain the DM-RS transmitting in current subframe as follows:

To the DM-RS of wherein one group of upper transmission of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to separate spread spectrum, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that is 4 to the length corresponding to described DM-RS antenna port of LTE system version 10 definition to the DM-RS use of the upper transmission of another group RE converts is separated spread spectrum, to obtain the DM-RS transmitting on this antenna port.

Further, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: the time domain orthogonal frequency expansion sequence obtaining after the first two spreading factor of the time domain orthogonal frequency expansion sequence that is 4 by the length of LTE system version 10 definition and latter two spreading factor switch; Or,

If increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: last spreading factor in the time domain orthogonal frequency expansion sequence that is 4 using the length of LTE system version 10 definition is as first spreading factor, after other spreading factor orders, move the time domain orthogonal frequency expansion sequence obtaining, or, first spreading factor in the time domain orthogonal frequency expansion sequence that is 4 using the length of LTE system version 10 definition is as last spreading factor, the time domain orthogonal frequency expansion sequence that other spreading factors sequentially move forward and obtain.

For expansion CP, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, by in every two adjacent OFDM symbol in a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port, or,

For expansion CP, if increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, the upper DM-RS transmitting of RE using transmitting DM-RS on the described DM-RS antenna port of definition in LTE system version 10, mode according to 10 definition of LTE system version is separated spread spectrum, to obtain the DM-RS transmitting on this antenna port; And,

On increase has the OFDM symbol of the RE that uses of transmission DM-RS, 2 RE that on frequency domain, immediate two transmission DM-RS are used are as one group, the DM-RS of every group of upper transmission of RE is used the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2; Or, in the OFDM symbol that increase is had to the RE that uses of transmission DM-RS and LTE system version 10, first of definition comprises on the OFDM symbol that transmits the RE that DM-RS uses, 2 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that it is 2 that the DM-RS of every group of upper transmission of RE is used the length corresponding to described DM-RS antenna port of LTE system version 10 definition converts is separated spread spectrum, to obtain the DM-RS transmitting on this antenna port.

Further, the time domain orthogonal frequency expansion sequence obtaining after described conversion is:

The time domain orthogonal frequency expansion sequence that the length obtaining after two spreading factor switches in the time domain orthogonal frequency expansion sequence that is 2 by the length of LTE system version 10 definition is 2.

Further, described signal acquiring unit 71 for: when adopting described method three, according to the described DM-RS mapping resource of determining, obtain the DM-RS transmitting in current subframe as follows:

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, by on each the OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to separate spread spectrum, to obtain the DM-RS transmitting on this antenna port.

Further, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.

Further, when current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or when current subframe is special subframe, N is no more than 2 positive integer or is no more than 3 positive integers.

Referring to Figure 14, the embodiment of the present invention provides ，Gai base station, a kind of base station to comprise:

Resource mapping unit 80, for determining that according to DM-RS resource mapping method DM-RS is in the mapping resource of current subframe, described DM-RS mapping resource at least comprises the Resource Unit RE at least one the OFDM symbol in the top n orthogonal frequency division multiplex OFDM symbol of current subframe, and N is not less than 1 integer;

Data transmission unit 81, for according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits.

Further, described resource mapping unit 80 for: one of as follows according to DM-RS resource mapping method, determine that DM-RS is in the mapping resource of current subframe:

A kind of method three: determine according to actual needs DM-RS resource mapping method, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or physical downlink control channel PDCCH, described configuration information is indicated a kind of DM-RS resource mapping method, or indicates in the top n OFDM symbol of a subframe, whether there is DM-RS mapping resource; Or,

Further, described resource mapping unit 80 for: determine according to actual needs one of as follows a kind of DM-RS resource mapping method, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or PDCCH:

According to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe, or,

According to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe, or,

From predefined multiple DM-RS resource mapping method, select according to actual needs a kind of predefined DM-RS resource mapping method, according to described predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send the configuration information of a kind of predefined DM-RS resource mapping method that is used to indicate described selection by high-level signaling or PDCCH, or to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe.

Further, when described resource mapping unit 80 is according to described predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the as follows definition of described predefined DM-RS resource mapping method:

Mode two: DM-RS resource mapping method corresponding to each DM-RS antenna port based on definition in LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in a subframe on this antenna port, increase the RE that DM-RS is corresponding, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or, RE corresponding to DM-RS by the RE that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding after the translation on time domain and/or frequency domain, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or,

Further, described data transmission unit 81 for: adopting described method for the moment, according to the described DM-RS mapping resource of determining, DM-RS be mapped in current subframe and transmitted as follows:

For regular circulation prefix CP, in current subframe, DM-RS transmits on each antenna port at place, in the RE that transmission DM-RS is used, 4 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, on the OFDM symbol that the first two is comprised to the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, on latter two OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port, or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, 2 RE that the transmission DM-RS of the same subcarrier number of correspondence is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port; Or,

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, that transmission DM-RS on each OFDM that comprises DM-RS mapping resource is used and on frequency domain the most adjacent two RE as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

Further, described data transmission unit 81 for: when adopting described method two, according to the described DM-RS mapping resource of determining, DM-RS is mapped in current subframe and is transmitted as follows:

To the DM-RS of wherein one group of upper transmission of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to carry out spread spectrum, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that is 4 to the length corresponding to described DM-RS antenna port of LTE system version 10 definition to the DM-RS use of the upper transmission of another group RE converts carries out spread spectrum, to transmit described DM-RS on this antenna port.

For expansion CP, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, by in every two adjacent OFDM symbol in a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 2 RE that the transmission DM-RS of corresponding same subcarrier number or adjacent sub-carrier numbering is used are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port, or,

For expansion CP, if increase the RE that transmission DM-RS is used on an OFDM symbol in the top n OFDM of current subframe symbol, in current subframe, DM-RS transmits on each antenna port at place, the upper DM-RS transmitting of RE using transmitting DM-RS on the described DM-RS antenna port of definition in LTE system version 10, mode according to 10 definition of LTE system version is carried out spread spectrum, to transmit described DM-RS on this antenna port; And,

On increase has the OFDM symbol of the RE that uses of transmission DM-RS, 2 RE that on frequency domain, immediate two transmission DM-RS are used are as one group, the DM-RS of every group of upper transmission of RE is used the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2; Or, in the OFDM symbol that increase is had to the RE that uses of transmission DM-RS and LTE system version 10, first of definition comprises on the OFDM symbol that transmits the RE that DM-RS uses, 2 RE of corresponding same subcarrier number or adjacent sub-carrier numbering are as one group, the time domain orthogonal frequency expansion sequence obtaining after the time domain orthogonal frequency expansion sequence that it is 2 that the DM-RS of every group of upper transmission of RE is used the length corresponding to described DM-RS antenna port of LTE system version 10 definition converts carries out spread spectrum, to transmit described DM-RS on this antenna port.

Further, described data transmission unit 81 for: when adopting described method three, according to the described DM-RS mapping resource of determining, DM-RS is mapped in current subframe and is transmitted as follows:

For conventional CP, in current subframe, DM-RS transmits on each antenna port at place, by on a plurality of OFDM symbols that comprise the RE that uses of transmission DM-RS, 4 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 4 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

For expansion CP, in current subframe, DM-RS transmits on each antenna port at place, by on each the OFDM symbol that comprises the RE that uses of transmission DM-RS, 2 RE of two corresponding adjacent subcarrier number are as one group, to the DM-RS of the upper transmission of every group of RE, use the time domain orthogonal frequency expansion sequence that the length corresponding to described DM-RS antenna port of LTE system version 10 definition is 2 to carry out spread spectrum, to transmit described DM-RS on this antenna port.

Further, when current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or when current subframe is special subframe, N is no more than 2 positive integer or is no more than 3 positive integer.

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

In the scheme that the embodiment of the present invention provides, in the control area of subframe, be in top n OFDM symbol, to have the mapping resource of DM-RS, making channel estimating information on top n OFDM symbol to carry out interpolation calculation by the DM-RS transmitting on this N OFDM symbol obtains, avoid DM-RS through this N of distance in time domain symbol limited row far away to carry out extrapolation algorithm and obtain, thereby improved the data demodulates performance on NCT carrier wave.

Further, in the scheme that the embodiment of the present invention provides, can be applied in special subframe, for the TDD special subframe configuration of not supporting DM-RS transmission in LTERel-10, for example, during descending conventional CP, TDD

special subframe configuration

0 and 5, during descending expansion CP, TDD

special subframe configuration

0 and 4, can according to the invention provides to method obtain arbitrary TDD special subframe and configure corresponding DM-RS resource mapping method, thereby also can transmit DM-RS on the special subframe of not supporting DM-RS to transmit in Rel-10, and then can in special subframe, carry out the downlink data transmission based on DM-RS, thereby improved the resource utilization of NCT carrier wave.

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 in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in 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 of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

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 appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of 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 appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of 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 modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into 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 within of the present invention these are revised and 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. a downlink user 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, described terminal is determined the mapping resource of DM-RS in current subframe according to DM-RS resource mapping method, specifically comprises one of following method:

Method one: the DM-RS resource mapping method of definition in the rule of terminal based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe; Or,

Method two: the DM-RS resource mapping method of definition in the rule of terminal based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, or,

Method three: terminal is according to the configuration information carrying in high-level signaling or physical downlink control channel PDCCH, determine DM-RS resource mapping method, and determine that according to described definite DM-RS resource mapping method DM-RS transmits the mapping resource on the antenna port at place in current subframe, wherein said configuration information is indicated a kind of DM-RS resource mapping method, or indicates in the top n OFDM symbol of a subframe, whether there is DM-RS mapping resource; Or,

Method four: terminal is according to predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, described predefined DM-RS resource mapping method at least meets and at least 1 OFDM symbol in the top n OFDM of subframe symbol, has DM-RS mapping resource.

3. method as claimed in claim 2, it is characterized in that, described terminal is according to the configuration information carrying in high-level signaling or PDCCH, determine DM-RS resource mapping method, and determine the mapping resource of DM-RS in current subframe according to described definite DM-RS resource mapping method, specifically comprise one of following method:

Method one: terminal is according to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe, or,

Method two: terminal is according to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, or,

Method three: terminal is according to described configuration information, from predefined multiple DM-RS resource mapping method, select the indicated a kind of predefined DM-RS resource mapping method of described configuration information, and according to described predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe; Or,

Method four: terminal is according to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, from predefined multiple DM-RS resource mapping method, be chosen in a kind of predefined DM-RS resource mapping method that has DM-RS mapping resource in the top n OFDM symbol of a subframe, and according to described predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe.

4. method as claimed in claim 2 or claim 3, it is characterized in that, when described terminal is according to described predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the as follows definition of described predefined DM-RS resource mapping method:

Method one: by the translation on time domain and/or frequency domain, by the part RE in the RE set that on each DM-RS antenna port of definition in LTE system version 10 in a subframe, DM-RS is corresponding, move in a subframe at least one the OFDM symbol in the top n OFDM symbol on this antenna port the DM-RS resource mapping method obtaining; Or,

Method two: DM-RS resource mapping method corresponding to each DM-RS antenna port based on definition in LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in a subframe on this antenna port, increase the RE that DM-RS is corresponding, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as the DM-RS DM-RS resource mapping method that the mapping resource on this antenna port obtains in current subframe, or,

Method three: meet on each the DM-RS antenna port in a subframe, exist the OFDM symbol of DM-RS mapping resource non-conterminous, and the DM-RS that existence at least 1 group on described OFDM symbol is comprised of the RE of at least 2 adjacent sub-carriers numberings of correspondence shine upon resource.

5. the method as described in claim 2 or 3 or 4, is characterized in that, is adopting described method for the moment, and terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe, specifically comprises:

6. the method as described in claim 2 or 3 or 4, is characterized in that, is adopting described method for the moment, and terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe, specifically comprises:

7. the method as described in claim 2 or 3 or 4, is characterized in that, when adopting described method two, terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe, specifically comprises:

8. method as claimed in claim 7, it is characterized in that, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: the time domain orthogonal frequency expansion sequence obtaining after the first two spreading factor of the time domain orthogonal frequency expansion sequence that is 4 by the length of LTE system version 10 definition and latter two spreading factor switch; Or,

9. the method as described in claim 2 or 3 or 4, is characterized in that, when adopting described method two, terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe, specifically comprises:

10. method as claimed in claim 9, is characterized in that, the time domain orthogonal frequency expansion sequence obtaining after described conversion is:

11. methods as claimed in claim 4, is characterized in that, when adopting described method three, terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe, specifically comprises:

12. methods as claimed in claim 4, is characterized in that, when adopting described method three, terminal, according to the described DM-RS mapping resource of determining, is obtained the DM-RS transmitting in current subframe, specifically comprises:

13. as the method as described in arbitrary in claim 1-12, it is characterized in that, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.

14. methods as claimed in claim 13, is characterized in that, when current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or,

When current subframe is special subframe, N is no more than 2 positive integer or is no more than 3 positive integer.

15. 1 kinds of downlink user dedicated demodulation reference signal DM-RS transmission methods, is characterized in that, the method comprises:

16. methods as claimed in claim 15, is characterized in that, the mapping resource of DM-RS in current subframe determined according to DM-RS resource mapping method in described base station, specifically comprises one of following method:

Method one: the DM-RS resource mapping method of definition in the rule of base station based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe; Or,

Method two: the DM-RS resource mapping method of definition in the rule of base station based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, or,

A kind of method three: base station is determined DM-RS resource mapping method according to actual needs, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or physical downlink control channel PDCCH, described configuration information is indicated a kind of DM-RS resource mapping method, or indicates in the top n OFDM symbol of a subframe, whether there is DM-RS mapping resource; Or,

Method four: base station is according to predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, described predefined DM-RS resource mapping method at least meets and at least 1 OFDM symbol in the top n OFDM of subframe symbol, has DM-RS mapping resource.

17. methods as claimed in claim 16, it is characterized in that, described base station is determined a kind of DM-RS resource mapping method according to actual needs, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or physical downlink control channel PDCCH, specifically comprise one of following method:

Method one: base station according to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, by the translation on time domain and/or frequency domain, in current subframe, DM-RS transmits on the antenna port at place, by the part RE in the RE set that on this DM-RS antenna port of definition in LTE system version 10, DM-RS is corresponding, move at least one the OFDM symbol in the top n OFDM symbol of this subframe, by the RE after movement and not mobile residue RE, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe, or,

Method two: base station according to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe, or,

A kind of method three: base station is selected predefined DM-RS resource mapping method according to actual needs from predefined multiple DM-RS resource mapping method, according to described predefined DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send the configuration information of a kind of predefined DM-RS resource mapping method that is used to indicate described selection by high-level signaling or PDCCH, or to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe.

18. methods as described in claim 16 or 17, it is characterized in that, when described base station is according to described predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the as follows definition of described predefined DM-RS resource mapping method:

19. methods as described in claim 16 or 17 or 18, is characterized in that, are adopting described method for the moment, and base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits, and specifically comprises:

20. methods as described in claim 16 or 17 or 18, is characterized in that, are adopting described method for the moment, and base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits, and specifically comprises:

21. methods as described in claim 16 or 17 or 18, is characterized in that, when adopting described method two, base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits, and specifically comprises:

22. methods as claimed in claim 21, it is characterized in that, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: the time domain orthogonal frequency expansion sequence obtaining after the first two spreading factor of the time domain orthogonal frequency expansion sequence that is 4 by the length of LTE system version 10 definition and latter two spreading factor switch; Or,

23. methods as described in claim 16 or 17 or 18, is characterized in that, when adopting described method two, base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits, and specifically comprises:

24. methods as claimed in claim 23, is characterized in that, the time domain orthogonal frequency expansion sequence obtaining after described conversion is:

25. methods as claimed in claim 18, is characterized in that, when adopting described method three, base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits, and specifically comprises:

26. methods as claimed in claim 18, is characterized in that, when adopting described method three, base station, according to the described DM-RS mapping resource of determining, is mapped to DM-RS in current subframe and transmits, and specifically comprises:

27. as the method as described in arbitrary in claim 15 ~ 26, it is characterized in that, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.

28. methods as claimed in claim 27, is characterized in that, when current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or,

29. 1 kinds of terminals, is characterized in that, this terminal comprises:

30. terminals as claimed in claim 29, is characterized in that, described resource mapping unit is used for: one of as follows according to DM-RS resource mapping method, determine that DM-RS is in the mapping resource of current subframe:

Method two: the DM-RS resource mapping method of definition in the rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, or,

31. terminals as claimed in claim 30, it is characterized in that, described resource mapping unit is used for: one of as follows according to the configuration information being carried by high-level signaling or PDCCH, determine DM-RS resource mapping method, and determine the mapping resource of DM-RS in current subframe according to described definite DM-RS resource mapping method:

According to described configuration information, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, or,

32. terminals as described in claim 30 or 31, it is characterized in that, when described resource mapping unit is according to described predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the as follows definition of described predefined DM-RS resource mapping method:

33. terminals as described in claim 30 or 31 or 32, is characterized in that, described signal acquiring unit is used for: adopting described method for the moment, according to the described DM-RS mapping resource of determining, obtaining the DM-RS transmitting in current subframe as follows:

34. terminals as described in claim 30 or 31 or 32, is characterized in that, described signal acquiring unit is used for: adopting described method for the moment, according to the described DM-RS mapping resource of determining, obtaining the DM-RS transmitting in current subframe as follows:

35. terminals as described in claim 30 or 31 or 32, is characterized in that, described signal acquiring unit is used for: when adopting described method two, according to the described DM-RS mapping resource of determining, obtain the DM-RS transmitting in current subframe as follows:

36. terminals as claimed in claim 35, it is characterized in that, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: the time domain orthogonal frequency expansion sequence obtaining after the first two spreading factor of the time domain orthogonal frequency expansion sequence that is 4 by the length of LTE system version 10 definition and latter two spreading factor switch; Or,

37. terminals as described in claim 30 or 31 or 32, is characterized in that, described signal acquiring unit is used for: when adopting described method two, according to the described DM-RS mapping resource of determining, obtain the DM-RS transmitting in current subframe as follows:

38. terminals as claimed in claim 37, is characterized in that, the time domain orthogonal frequency expansion sequence obtaining after described conversion is:

39. terminals as claimed in claim 32, is characterized in that, described signal acquiring unit is used for: when adopting described method three, according to the described DM-RS mapping resource of determining, obtain the DM-RS transmitting in current subframe as follows:

40. terminals as claimed in claim 32, is characterized in that, described signal acquiring unit is used for: when adopting described method three, according to the described DM-RS mapping resource of determining, obtain the DM-RS transmitting in current subframe as follows:

41. as the terminal as described in arbitrary in claim 29-40, it is characterized in that, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.

42. terminals as claimed in claim 41, is characterized in that, when current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or,

When current subframe is special subframe, N is no more than 2 positive integer or is no more than 3 positive integers.

43. 1 kinds of base stations, is characterized in that, this base station comprises:

44. base stations as claimed in claim 43, is characterized in that, described resource mapping unit is used for: one of as follows according to DM-RS resource mapping method, determine that DM-RS is in the mapping resource of current subframe:

45. base stations as claimed in claim 44, it is characterized in that, described resource mapping unit is used for: determine according to actual needs one of as follows a kind of DM-RS resource mapping method, according to this DM-RS resource mapping method, determine that DM-RS transmits the mapping resource on the antenna port at place in current subframe, and to terminal, send configuration information by high-level signaling or PDCCH:

According to actual needs, determine and in the top n OFDM symbol of current subframe, whether have DM-RS mapping resource, when definite existence, the DM-RS resource mapping method of definition in rule based on making an appointment and LTE system version 10, on at least one OFDM symbol in top n OFDM symbol in current subframe on the antenna port at DM-RS transmission place, increase the RE that transmission DM-RS is used, by RE corresponding to DM-RS on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, as DM-RS mapping resource on this antenna port in current subframe, or, by the RE of RE correspondence position after the translation on time domain and/or frequency domain that on this DM-RS antenna port of definition in the RE increasing and LTE system version 10, DM-RS is corresponding, as DM-RS mapping resource on this antenna port in current subframe, and to terminal, send by high-level signaling or PDCCH the configuration information that whether has DM-RS mapping resource in the top n OFDM symbol that is used to indicate a subframe, or,

46. base stations as described in claim 44 or 45, it is characterized in that, when described resource mapping unit is according to described predefined DM-RS resource mapping method, while determining the mapping resource of DM-RS in current subframe, one of the as follows definition of described predefined DM-RS resource mapping method:

47. base stations as described in claim 44 or 45 or 46, is characterized in that, described data transmission unit is used for: adopting described method for the moment, according to the described DM-RS mapping resource of determining, DM-RS is being mapped in current subframe and is transmitted as follows:

48. base stations as described in claim 44 or 45 or 46, is characterized in that, described data transmission unit is used for: adopting described method for the moment, according to the described DM-RS mapping resource of determining, DM-RS is being mapped in current subframe and is transmitted as follows:

49. base stations as described in claim 44 or 45 or 46, is characterized in that, described data transmission unit is used for: when adopting described method two, according to the described DM-RS mapping resource of determining, DM-RS is mapped in current subframe and is transmitted as follows:

50. base stations as claimed in claim 49, it is characterized in that, if increase the RE that transmission DM-RS is used on two OFDM symbols in the top n OFDM of current subframe symbol, the time domain orthogonal frequency expansion sequence obtaining after described conversion is: the time domain orthogonal frequency expansion sequence obtaining after the first two spreading factor of the time domain orthogonal frequency expansion sequence that is 4 by the length of LTE system version 10 definition and latter two spreading factor switch; Or,

51. base stations as described in claim 44 or 45 or 46, is characterized in that, described data transmission unit is used for: when adopting described method two, according to the described DM-RS mapping resource of determining, DM-RS is mapped in current subframe and is transmitted as follows:

52. base stations as claimed in claim 51, is characterized in that, the time domain orthogonal frequency expansion sequence obtaining after described conversion is:

53. base stations as claimed in claim 46, is characterized in that, described data transmission unit is used for: when adopting described method three, according to the described DM-RS mapping resource of determining, DM-RS is mapped in current subframe and is transmitted as follows:

54. base stations as claimed in claim 46, is characterized in that, described data transmission unit is used for: when adopting described method three, according to the described DM-RS mapping resource of determining, DM-RS is mapped in current subframe and is transmitted as follows:

55. as the base station as described in arbitrary in claim 43 ~ 54, it is characterized in that, current subframe is the special subframe of conventional descending sub frame or corresponding any one TDD special subframe configuration.

56. base stations as claimed in claim 55, is characterized in that, when current subframe is conventional descending sub frame, N is no more than 4 positive integer; And/or,