CN106160970A - The sending method of downlink demodulation reference signal in multi-user MIMO system - Google Patents
The sending method of downlink demodulation reference signal in multi-user MIMO system Download PDFInfo
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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
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:
Initialization sequence is:
nSCIDIt 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 wordMCSAnd rvidx
It is configured to IMCS=0 and rvidx=1.Scrambler ID (nSCID) 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, nSCID=0;
UE2: use port 7, nSCID=1;
UE3: use port 8, nSCID=0;
UE4: use port 8, nSCID=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 (nSCID) 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, nSCID=0;
UE2: use port 7 and 8, nSCID=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 instructionSCIDStill 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 instructionSCIDStill 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 instructionSCIDDo 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 7,8SCID, 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 usedSCIDRespectively 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 usesSCIDTwo 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, nSCIDStill 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, nSCIDStill
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 nSCIDDo 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, nSCIDStill 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, nSCIDStill
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 nSCIDDo 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 nSCIDDo 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 nSCIDDo 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 nSCIDDo 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 nSCID, institute
So that both differentiations can be realized.With the mode (3) in embodiment 1 in like manner, new DMRS resource distribution
NSCIDThe n of former DMRS resource distribution can be arranged toSCIDPlus a bias, or it is arranged to former
The n of DMRS resource distributionSCIDDifferent 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.
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