CN106160970A - The sending method of downlink demodulation reference signal in multi-user MIMO system - Google Patents

Abstract

The present invention proposes the sending method of downlink demodulation reference signal in a kind of multi-user MIMO system, including: use " antenna port, scrambler ID and number of plies instruction " field and other field, the DMRS resource distribution that the current PDSCH transmission of joint instructions is used of 3bit.The present invention can support more number of plies or dispatch the MU-MIMO transmission of more UE number simultaneously, and significantly improves MU-MIMO system performance.

Description

The sending method of downlink demodulation reference signal in multi-user MIMO system

Technical field

The present invention relates to wireless communication field, particularly relate to downstream modulation in a kind of multi-user MIMO system The sending method of reference signal.

Background technology

At advanced long-term evolution system (Long-Term Evolution advance, referred to as LTE-Advance) Define two kinds of pilot tones of LTE-Advanced system, i.e. channel state information reference signals (Channel State Information reference Signals, is called for short CSI-RS) and demodulated reference signal (Demodulation Reference Signals, referred to as DMRS).

In existing protocol, if SU-MIMO can support 8 DMRS port, port numbers table the most altogether It is shown as p=7,8 ..., υ+6, υ represent the number of plies of current downlink Physical Shared Channel PDSCH, and maximum is 8. DMRS utilizes the OCC (orthogonal covering codes) of a length of 4 to realize the multiplexing of port, port p=7, and 8,11,13 Share identical RE resource, be a set, port p=9,10,12,14 share identical RE resource, for Another set, is all distinguished by OCC code as shown in Figure 1.

The formation sequence of the DMRS in R10 version is:

$r\left(m\right)=\frac{1}{\sqrt{2}}(1-2\·c\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+)),$ $m=\left\{\begin{array}{cc}0.1,...,12N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1& \mathrm{normlcyclicprefix}\\ 0.1,...,16N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1& \mathrm{extendedcyclicprefix}\end{array}\right.$

Initialization sequence is:

n_SCIDIt is the scrambler ID of DMRS.

By " antenna port, scrambler ID and the number of plies indicate " of 3bit in PDCCH format 2C/2D Field, indicates the DMRS resource distribution that current PDSCH transmission is used, including DMRS antenna end Mouthful, generate the number of plies of scrambler ID and PDSCH of DMRS.As shown in table Fig. 2.Work as only one of which When code word enables, index 4～6 is used for the re-transmission of TB block corresponding to this code word, and the I of another code word_MCSAnd rv_idx It is configured to I_MCS=0 and rv_idx=1.Scrambler ID (n_SCID) only can take { 0,1} two when layer one and layer two Value, is 0 value more than layer two when transmitting.

For the downlink demodulation reference signal of multiuser MIMO (MU-MIMO) system, prior art is still " antenna port, scrambler ID and the number of plies instruction " field shown in Fig. 2 is used to carry out indicating downlink DMRS money Source configures.Concrete sending method includes:

(1) when UE is when transmitting for one layer, and each UE can use different port 7 or 8, and each UE Can use different scrambler ID values 0 or 1, the weak of DMRS that the most at most can realize four UE is correlated with, I.e. eNB at most can support 4 UE, such as:

UE1: use port 7, n_SCID=0；

UE2: use port 7, n_SCID=1；

UE3: use port 8, n_SCID=0；

UE4: use port 8, n_SCID=1.

(2) when UE transmits in two-layer, owing to needing the transparency ensureing MU-MIMO for UE, So MU-MIMO is only with port 7 and 8, and each UE the most only supports two orthogonal DMRS, By two different scrambler ID (n_SCID) value 0 or 1, it is achieved the DMRS's of two UE is weak relevant, I.e. eNB could support up 2 UE.Such as:

UE1: use port 7 and 8, n_SCID=0；

UE2: use port 7 and 8, n_SCID=1.

In third generation partner program (3rd Generation Partnership Project is called for short 3GPP) LTE65 meeting has been directed towards full dimension MIMO technique (Full-Dimension MIMO, Referred to as FD-MIMO) project verification, for studying the beam shaping supporting vertical with horizontal plane.Bidimensional battle array The antenna system of array structure can carry out Self Adaptive Control in vertically and horizontally dimension, it is possible to supports more Many numbers of plies or simultaneously dispatch the important side that the MU-MIMO transmission of more UE number is Future Development To.But existing DMRS sending method is when MU-MIMO transmission, each UE could support up 2 Orthogonal port, i.e. could support up the MU-MIMO transmission of two layers；ENB could support up a layer of 4 UE Transmission, and could support up two layers of transmission of 2 UE, i.e. eNB could support up and sends out 4 DMRS, it is impossible to Meet the needs of MU-MIMO transmission.

Summary of the invention

The present invention proposes the sending method of downlink demodulation reference signal in a kind of multi-user MIMO system, should Method is: use " antenna port, scrambler ID and number of plies instruction " field and other field, the connection of 3bit Close the DMRS resource distribution indicating current PDSCH transmission to be used.

Other field described can be 1bit.Preferably, other field described can enable TB block with right and wrong NDI, new field or the extended field of " antenna port, scrambler ID and number of plies instruction " field.

When other field described is the NDI of non-enable TB block, preferably:

When described NDI is 0, the index 4～8 of " antenna port, scrambler ID and number of plies instruction " field Still indicate former DMRS resource distribution；When described NDI is 1, " antenna port, scrambler ID and the number of plies Instruction " index 4～8 instruction of field enables four kinds of DMRS resource distributions of one layer of TB block transmission, and should Four kinds of DMRS resource distributions are equal with former four kinds of DMRS resource distributions of one layer of transmission of index 0～3 instruction Difference, can use following three kinds of optimal ways to distinguish the DMRS resource of index 4～8 and index 0～3 Configuration:

(1) when described NDI is 1, four kinds of DMRS resource distribution employings of index 4～8 instruction and rope Draw 0～3 2 identical scrambler ID values and from index 0～3 2 different antenna end slogans；Index 4～8 And by using different OCC codes to distinguish indicated DMRS resource distribution between index 0～3.

(2) when described NDI is 1, four kinds of DMRS resource distribution employings of index 4～8 instruction and rope Draw 0～3 2 identical scrambler ID values and from index 0～3 2 different antenna end slogans；Index 4～8 And by using different RE resources to distinguish indicated DMRS resource distribution between index 0～3.

(3) when described NDI is 1, four kinds of DMRS resource distributions of index 4～8 instruction use 2 Individual scrambler ID value and with index 0～3 2 identical antenna end slogans；Between index 4～8 and index 0～3 By using different scrambler ID values to distinguish indicated DMRS resource distribution.Index 4～8 instruction 2 scrambler ID values that four kinds of DMRS resource distributions are used can be any one of following two: rope 2 the scrambler ID values being used of four kinds of DMRS resource distributions drawing 0～3 instructions add a biasing respectively Value；Two different from 2 scrambler ID values that four kinds of DMRS resource distributions that index 0～3 indicates are used Individual fixed value.

When other field described is new field, preferably: when described new field is 0, " antenna end Mouthful, scrambler ID and number of plies instruction " field still indicates former DMRS resource distribution；When described new field is When 1, the DMRS resource distribution that " antenna port, scrambler ID and number of plies instruction " field instruction is new.

When other field described is the extended field of " antenna port, scrambler ID and number of plies instruction " field, Preferred: after " antenna port, scrambler ID and number of plies instruction " field extension, index 0～7 still indicates former DMRS resource distribution；The DMRS resource distribution that index 8～15 instruction is new.

In said method, described new DMRS resource distribution may include that one layer of 4 kinds of DMRS transmitted Resource distribution, 2 kinds of DMRS resource distributions of two layers of transmission, a kind of DMRS resource of three-layer transmission are joined Put and a kind of DMRS resource distribution of 4 layers of transmission.Following three kinds of optimal ways can be used to distinguish New DMRS resource distribution and former DMRS resource distribution:

(1) a layer of new DMRS resource distribution/bis-layers of transmission use and former DMRS resource distribution One layer/bis-layers transmit 2 identical scrambler ID values and one layer/bis-layers transmission with former DMRS resource distribution 2 different antenna end slogans, between the two by using different OCC codes to distinguish；

Three layers of new DMRS resource distribution/tetra-layers transmission use three layers with former DMRS resource distribution/ The antenna end slogan that four layers of transmission is identical, between the two by using different scrambler ID values to distinguish.

(2) one layer in DMRS resource distribution/bis-layers new transmission use and former DMRS resource distribution One layer/bis-layers transmission 2 identical scrambler ID value and one layer/bis-layers biography with former DMRS resource distribution Defeated 2 different antenna end slogans, between the two by using different RE resources to distinguish；

Three layers of new DMRS resource distribution/tetra-layers transmission use three layers with former DMRS resource distribution/ The antenna end slogan that four layers of transmission is identical, between the two by using different scrambler ID values to distinguish.

(3) new DMRS resource distribution uses the antenna end slogan identical with former DMRS resource distribution, Between the two by using different scrambler ID values to distinguish.

The present invention can support more number of plies or dispatch the MU-MIMO transmission of more UE number simultaneously, and Significantly improve MU-MIMO system performance.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, retouch below Accompanying drawing in stating is some embodiments of the present invention, for those of ordinary skill in the art, is not paying On the premise of creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the list figure of the OCC code realizing multiplexed port of background technology；

Fig. 2 is the configured list figure of " antenna port, scrambler ID and number of plies instruction " field of background technology；

Fig. 3 is a kind of preferably " antenna port, scrambler ID and number of plies instruction " field of embodiment 1 Configured list figure；

Fig. 4 is another kind of preferably " antenna port, scrambler ID and number of plies instruction " field of embodiment 1 Configured list figure；

Fig. 5 is a kind of preferably " antenna port, scrambler ID and number of plies instruction " field of embodiment 2 Configured list figure；

Fig. 6 is another kind of preferably " antenna port, scrambler ID and number of plies instruction " field of embodiment 2 Configured list figure；

Fig. 7 is a kind of preferably " antenna port, scrambler ID and number of plies instruction " extension word of embodiment 3 The configured list figure of section；

Fig. 8 is another kind of preferably " antenna port, scrambler ID and number of plies instruction " extension of embodiment 3 The configured list figure of field.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the present invention Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that Described embodiment is a part of embodiment of the present invention rather than whole embodiments；It should be noted that In the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Based on Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise Every other embodiment, broadly fall into the scope of protection of the invention.

The present invention uses former " antenna port, scrambler ID and number of plies instruction " field and other field of 3bit, The DMRS resource distribution that the current PDSCH transmission of joint instructions is used, can increase MU-MIMO The option of descending DMRS resource distribution, and then meet the demand of MU-MIMO system.Institute of the present invention Have other field described in embodiment to be 1bit, actual can be according to MU-MIMO system when realizing The size of other field described in user capacity flexible planning.

Embodiment 1

The present embodiment NDI (New Data Indicator, the new data of non-enable (Disable) TB block Instruction) and " antenna port, scrambler ID and number of plies instruction " field, joint instructions descending DMRS resource Configuration.

When the NDI in non-enable TB block is 0, " antenna port, scrambler ID and number of plies instruction " field Index 4～7 still indicate former DMRS resource distribution (re-transmission for enabling TB block being in Fig. 2)； When NDI is 1, index 4～8 instruction enables four kinds of new DMRS resources of one layer of transmission of TB block Configuration, the former four kinds of DMRS resource distributions from one layer of transmission that the index 0～3 in Fig. 2 indicates are different. So eNB just can could support up one layer of transmission of 8 UE.

Base station side is sent out needing to dispatch the subframe of downlink business of UE, PDCCH or EPDCCH region Descending control signaling DCI, instruction is sent to there is downlink data and the control of downlink data of UE at present sub-frame Information.UE carries out blind check in this subframe and obtains the instruction information in DCI, obtains the non-enable of DCI (Disable) NDI in TB block, determines descending DMRS resource distribution according to the value of NDI.

Four kinds of new DMRS resource distributions for index 4～8 instruction are former with four kinds of index 0～3 instruction DMRS resource distribution, can use following three kinds of optimal ways to distinguish:

(1) four kinds of DMRS resource distributions of index 4～8 instruction use with index 0～3 identical 2 disturb Code ID value and from index 0～3 2 different antenna end slogans；Pass through between index 4～8 and index 0～3 Different OCC codes is used to distinguish indicated DMRS resource distribution.

Such as, " antenna port, scrambler ID and number of plies instruction " field uses the configuration of Fig. 3, works as NDI When being 1, the n of index 4～8 instruction_SCIDStill take 0 or 1 value, and the DMRS port of instruction is port 11 Or port 13.Port 11,13 belongs to gathers S={7, and 8,11,13}, it is total to the ports 7,8 of index 0～3 instruction Enjoy same RE resource, then four ports use mutually different OCC code, and then can realize distinguishing The purpose of the DMRS resource distribution of index 4～8 and index 0～3.

(2) four kinds of DMRS resource distributions of index 4～8 instruction use with index 0～3 identical 2 disturb Code ID value and from index 0～3 2 different antenna end slogans；Pass through between index 4～8 and index 0～3 Different RE resources is used to distinguish indicated DMRS resource distribution.

Such as, " antenna port, scrambler ID and number of plies instruction " field uses the configuration of Fig. 4, works as NDI When being 1, the n of index 4～8 instruction_SCIDStill take 0 or 1 value, and the DMRS port of instruction is port 9 Or port 10.Port 9,10 belongs to gathers S={9, and 10,12,14}, the ports 7,8 of index 0～3 instruction belong to Another DMRS gathers S={7, and 8,11,13}, owing to two set use different RE resources, it is possible to real Now distinguish the purpose of the DMRS resource distribution of index 4～8 and index 0～3.Here, for index 4～8 Four kinds of new DMRS resource distribution inside between differentiation, can use with to index 0～3 identical existing Conventional differentiating method, such as, by using different OCC codes to distinguish between index 4 and index 6, By using different OCC codes to distinguish between index 5 and 7.

(3) four kinds of DMRS resource distributions of index 4～8 instruction use 2 scrambler ID values and with index 0～3 2 identical antenna end slogans；By using different scrambler ID between index 4～8 and index 0～3 Value distinguishes indicated DMRS resource distribution.

Such as, when NDI is 1, the DMRS port of index 4～8 instruction is still port 7 or port 8, But the n of index 4～8 instruction_SCIDDo not take 0 or 1 value, the i.e. port 7,8 of index 4～8 to use and index 0～3 The different n of port 7,8_SCID, and then realize distinguish index 4～8 and index 0～3 DMRS resource join The purpose put.

The scrambler ID value that the port 7,8 of index 4～8 uses can be arranged to index the port 7,8 of 0～3 The n used_SCIDRespectively plus a bias, this bias can be configured by high level；Or it is arranged to and rope Draw the n that the port 7,8 of 0～3 uses_SCIDTwo different fixed values, such as { 2,3}.

Embodiment 2

The present embodiment newly-increased 1bit " auxiliary ASLID " field and " antenna port, scrambler ID and layer Number instruction " field, joint instructions descending DMRS resource distribution.

When " auxiliary ASLID " field is 0, " antenna port, scrambler ID and number of plies instruction " field is still Indicate former DMRS resource distribution (i.e. configuration in Fig. 2)；When " auxiliary ASLID " is 1, " my god Line cap, scrambler ID and number of plies instruction " the field instruction new DMRS resource distribution different from Fig. 2. The present embodiment is in order to symmetrical with former DMRS resource distribution, and new DMRS resource distribution includes one layer of transmission 4 kinds of DMRS resource distributions, two layers transmission 2 kinds of DMRS resource distributions, a kind of three-layer transmission DMRS resource distribution and a kind of DMRS resource distribution of 4 layers of transmission.Actual realize stylish DMRS Resource distribution can also comprise other situation.

For new DMRS resource distribution and former DMRS resource distribution, following three kinds of preferred sides can be used Formula is distinguished:

(1) a layer of new DMRS resource distribution/bis-layers of transmission use and former DMRS resource distribution One layer/bis-layers transmit 2 identical scrambler ID values and one layer/bis-layers transmission with former DMRS resource distribution 2 different antenna end slogans, between the two by using different OCC codes to distinguish；New DMRS Three layers of resource distribution/tetra-layers of transmission use the sky identical with three layers of former DMRS resource distribution/tetra-layers of transmission Line end slogan, between the two by using different scrambler ID values to distinguish.

Such as, when " auxiliary ASLID " field is 1, " antenna port, scrambler ID and number of plies instruction " Field uses the configuration of Fig. 5.Particularly as follows:

When one TB block is effective, index 0～3 one layer of transmission of instruction, n_SCIDStill take 0 or 1 value, DMRS Port-for-port 11 or port 13；When two TB blocks are effective, index 0～1 instruction two-layer transmission, n_SCIDStill Taking 0 or 1 value, DMRS port is port 11 and port 13.Port 11,13 and former DMRS resource Configuration one layer/bis-layers transmission port 7,8 belong to gather S={7,8,11,13}, share a RE resource, Then four ports use mutually different OCC code, and then realize distinguishing new DMRS resource distribution and former The purpose of a layer of DMRS resource distribution/bis-layers of transmission.

When two TB blocks are effective, index 2～3 three layers and four layers transmission of instruction, single UE uses with former The port 7～9 and 7～10 that three layers of DMRS resource distribution are identical with four layers of transmission, then three layers and four layers biography Defeated n_SCIDDo not take 0 value, preferably take 1 value, and then realize three layers/tetra-with former DMRS resource distribution The differentiation of layer transmission.

(2) one layer in DMRS resource distribution/bis-layers new transmission use and former DMRS resource distribution One layer/bis-layers transmission 2 identical scrambler ID value and one layer/bis-layers biography with former DMRS resource distribution Defeated 2 different antenna end slogans, between the two by using different RE resources to distinguish；New Three layers of DMRS resource distribution/tetra-layers of transmission use three layers/tetra-layers transmission phase with former DMRS resource distribution Same antenna end slogan, between the two by using different scrambler ID values to distinguish.

Such as, when " auxiliary ASLID " field is 1, " antenna port, scrambler ID and number of plies instruction " Field uses the configuration of Fig. 6.Particularly as follows:

When one TB block is effective, index 0～3 one layer of transmission of instruction, n_SCIDStill take 0 or 1 value, DMRS Port-for-port 9 or port 10；When two TB blocks are effective, index 0～1 instruction two-layer transmission, n_SCIDStill Taking 0 or 1 value, DMRS port is port 9 and port 10.Port 9,10 belongs to gathers S={9, and 10,12,14}, The port 7,8 of a layer of former DMRS resource distribution/bis-layers of transmission belongs to another DMRS set S={7,8,11,13}, owing to two set use different RE resources, it is possible to realize distinguishing new DMRS The purpose of one layer/bis-layers transmission of resource distribution and former DMRS resource distribution.

When two TB blocks are effective, index 2～3 three layers and four layers transmission of instruction, single UE uses with former The port 7～9 and 7～10 that three layers of DMRS resource distribution are identical with four layers of transmission, then three layers and four layers biography Defeated n_SCIDDo not take 0 value, preferably take 1 value, and then realize three layers/tetra-with former DMRS resource distribution The differentiation of layer transmission.

(3) new DMRS resource distribution uses the antenna end slogan identical with former DMRS resource distribution, Between the two by using different scrambler ID values to distinguish.

Such as, when " auxiliary ASLID " field is 1, concrete configuration is:

When one TB block is effective, index 0～3 one layer of transmission of instruction, DMRS port is still port 7 or end Mouth 8, but n_SCIDDo not take 0 or 1 value；When two TB blocks are effective, index 0～1 instruction two-layer transmission, DMRS Port is still port 7 and port 8, but n_SCIDDo not take 0 or 1 value；When two TB blocks are effective, index 2～3 Indicating three layers and four layers transmission, DMRS port is still 7～9 and 7～10, but n_SCIDDo not take 0 value.Due to newly DMRS resource distribution and one layer of former DMRS resource distribution～four layers of transmission have employed different n_SCID, institute So that both differentiations can be realized.With the mode (3) in embodiment 1 in like manner, new DMRS resource distribution N_SCIDThe n of former DMRS resource distribution can be arranged to_SCIDPlus a bias, or it is arranged to former The n of DMRS resource distribution_SCIDDifferent fixed values.

After the new resources configuration of the present embodiment is applied in combination with former DMRS resource distribution, each UE can be 4 orthogonal ports of many supports, i.e. could support up 4 layers of MU-MIMO transmission；ENB can could support up 8 One layer of transmission of individual UE, two layers of transmission of 4 UE, three layers of 2 UE or four layers transmission, i.e. eNB Could support up and send out 8 DMRS.

Embodiment 3

" antenna port, scrambler ID and number of plies instruction " field extension of former 3bit is 4bit by the present embodiment, The corresponding different descending DMRS resource distribution of different index.Index 0～7 still indicates former DMRS resource to join Put (i.e. configuration in Fig. 2)；The new DMRS resource distribution that index 8～15 instruction is different from Fig. 2. The present invention is in order to symmetrical with former DMRS resource distribution, and new DMRS resource distribution includes that one layer transmits 4 kinds of DMRS resource distributions, 2 kinds of DMRS resource distributions of two layers of transmission, a kind of DMRS of three-layer transmission Resource distribution and a kind of DMRS resource distribution of 4 layers of transmission.

With embodiment 2 in like manner, for new DMRS resource distribution and former DMRS resource distribution, can adopt Distinguish with following three kinds of optimal ways:

(1) a layer of new DMRS resource distribution/bis-layers of transmission use and former DMRS resource distribution One layer/bis-layers transmit 2 identical scrambler ID values and one layer/bis-layers transmission with former DMRS resource distribution 2 different antenna end slogans, between the two by using different OCC codes to distinguish；New DMRS Three layers of resource distribution/tetra-layers of transmission use the sky identical with three layers of former DMRS resource distribution/tetra-layers of transmission Line end slogan, between the two by using different scrambler ID values to distinguish.Such as, " antenna port, disturb Code ID and number of plies instruction " extended field uses the configuration of Fig. 7.

(2) one layer in DMRS resource distribution/bis-layers new transmission use and former DMRS resource distribution One layer/bis-layers transmission 2 identical scrambler ID value and one layer/bis-layers biography with former DMRS resource distribution Defeated 2 different antenna end slogans, between the two by using different RE resources to distinguish；New Three layers of DMRS resource distribution/tetra-layers of transmission use three layers/tetra-layers transmission phase with former DMRS resource distribution Same antenna end slogan, between the two by using different scrambler ID values to distinguish.Such as, " antenna end Mouthful, scrambler ID and number of plies instruction " extended field uses the configuration of Fig. 8.

(3) new DMRS resource distribution uses the antenna end slogan identical with former DMRS resource distribution, Between the two by using different scrambler ID values to distinguish.

With embodiment 2 in like manner, in the present embodiment, each UE can could support up 4 orthogonal ports, 4 layers of MU-MIMO transmission of many supports；ENB can could support up one layer of transmission of 8 UE, 4 Two layers of transmission of UE, three layers of 2 UE or four layers transmission, i.e. eNB could support up and sends out 8 DMRS.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can Completing with the hardware relevant by programmed instruction, aforesaid program can be stored in an embodied on computer readable and deposit In storage media, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage Medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CD.

Last it is noted that above example is only in order to illustrate technical scheme, rather than it is limited System；Although the present invention being described in detail with reference to previous embodiment, those of ordinary skill in the art It is understood that the technical scheme described in foregoing embodiments still can be modified by it, or to it Middle part technical characteristic carries out equivalent；And these amendments or replacement, do not make appropriate technical solution Essence departs from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (16)

1. the sending method of downlink demodulation reference signal in multi-user MIMO system, the method is:

Use " antenna port, scrambler ID and number of plies instruction " field and other field of 3bit, combine finger Show the DMRS resource distribution that current PDSCH transmission is used.

Method the most according to claim 1, it is characterised in that: other field described is 1bit.

Method the most according to claim 2, it is characterised in that: other field described is non-enable TB The NDI of block.

Method the most according to claim 3, it is characterised in that:

When described NDI is 0, the index 4～8 of " antenna port, scrambler ID and number of plies instruction " field Still indicate former DMRS resource distribution；

When described NDI is 1, the index 4～8 of " antenna port, scrambler ID and number of plies instruction " field Instruction enables four kinds of DMRS resource distributions of one layer of transmission of TB block, these four kinds of DMRS resource distributions Former four kinds of DMRS resource distributions of one layer of transmission from index 0～3 instruction are the most different.

Method the most according to claim 4, it is characterised in that:

When described NDI is 1, four kinds of DMRS resource distributions of index 4～8 instruction use and index 0～3 2 identical scrambler ID values and from index 0～3 2 different antenna end slogans；Index 4～8 and index By using different OCC codes to distinguish indicated DMRS resource distribution between 0～3.

Method the most according to claim 4, it is characterised in that:

When described NDI is 1, four kinds of DMRS resource distributions of index 4～8 instruction use and index 0～3 2 identical scrambler ID values and from index 0～3 2 different antenna end slogans；Index 4～8 and index By using different RE resources to distinguish indicated DMRS resource distribution between 0～3.

Method the most according to claim 4, it is characterised in that:

When described NDI is 1, four kinds of DMRS resource distributions of index 4～8 instruction use 2 scramblers ID value and with index 0～3 2 identical antenna end slogans；By adopting between index 4～8 and index 0～3 Indicated DMRS resource distribution is distinguished by different scrambler ID values.

Method the most according to claim 7, it is characterised in that four kinds of DMRS of index 4～8 instruction 2 scrambler ID values that resource distribution is used are any one of following two:

2 scrambler ID values that four kinds of DMRS resource distributions of index 0～3 instruction are used are respectively plus one Individual bias；

Two different from 2 scrambler ID values that four kinds of DMRS resource distributions that index 0～3 indicates are used Individual fixed value.

Method the most according to claim 2, it is characterised in that: other field described is new field.

Method the most according to claim 9, it is characterised in that:

When described new field is 0, " antenna port, scrambler ID and number of plies instruction " field still indicates former DMRS resource distribution；When described new field is 1, " antenna port, scrambler ID and number of plies instruction " The DMRS resource distribution that field instruction is new.

11. methods according to claim 2, it is characterised in that: other field described is " antenna end Mouthful, scrambler ID and number of plies instruction " extended field of field.

12. methods according to claim 11, it is characterised in that:

After " antenna port, scrambler ID and number of plies instruction " field extension, index 0～7 still indicates former DMRS Resource distribution；The DMRS resource distribution that index 8～15 instruction is new.

13. according to the method described in claim 10 or 12, it is characterised in that described new DMRS Resource distribution includes: 4 kinds of DMRS resource distributions of one layer of transmission, 2 kinds of DMRS moneys of two layers of transmission 1 kind of DMRS resource of source configuration, a kind of DMRS resource distribution of three-layer transmission and 4 layers of transmission is joined Put.

14. methods according to claim 13, it is characterised in that:

One layer of new DMRS resource distribution/bis-layers transmission use a layer with former DMRS resource distribution/ Two layers transmit 2 identical scrambler ID values and different from one layer of former DMRS resource distribution/bis-layers transmission 2 antenna end slogans, between the two by using different OCC codes to distinguish；

Three layers of new DMRS resource distribution/tetra-layers transmission use three layers with former DMRS resource distribution/ The antenna end slogan that four layers of transmission is identical, between the two by using different scrambler ID values to distinguish.

15. methods according to claim 13, it is characterised in that:

One layer in DMRS resource distribution/bis-layers new transmission use a layer with former DMRS resource distribution / bis-layers transmit 2 identical scrambler ID values and different from one layer of former DMRS resource distribution/bis-layers transmission 2 antenna end slogans, between the two by use different RE resources distinguish；

Three layers of new DMRS resource distribution/tetra-layers transmission use three layers with former DMRS resource distribution/ The antenna end slogan that four layers of transmission is identical, between the two by using different scrambler ID values to distinguish.

16. methods according to claim 13, it is characterised in that:

New DMRS resource distribution uses the antenna end slogan identical with former DMRS resource distribution, both Between by use different scrambler ID values distinguish.