CN105790814A - MIMO downlink demodulation reference signal (DMRS) and signaling transmission method and device - Google Patents
MIMO downlink demodulation reference signal (DMRS) and signaling transmission method and device Download PDFInfo
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Abstract
The invention discloses an MIMO downlink demodulation reference signal (DMRS) and signaling transmission method and device. The MIMO downlink DMRS and signaling transmission method comprises the following steps: an eNB determines a sending mode and sending parameters according to the feedback information of UE, wherein the sending mode includes SU-MIMO or MU-MIMO; a DMRS and a DCI are sent to the UE, wherein the DCI comprises a port indication; ports corresponding to a single codon or double codons are indicated in the DCI, and notification of a scrambling code initial value is not needed; in the DMRS transmission mode, different streams of the same UE are orthogonally multiplexed, adopt the same DMRS sequence, and are distinguished through the different ports; the different UE are non-orthogonally multiplexed and adopt different DMRS sequences, and the DMRS sequences are distinguished according to terminal IDs. The MIMO downlink DMRS and signaling transmission method and device provided by the invention have the advantages that due to the uniqueness of each terminal ID, the number of multiplex terminals is unlimited, and the multiplexing of a random number of the terminals can be achieved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to MIMO downstream modulation reference
Signal and signal transmission method and device.
Background technology
Multiple-input and multiple-output (MIMO) technology of multiple antennas space resources, owing to it is wireless
The great potential that the reliability of communications and speed promote, has had become as such as 3GPP
The core technology of the main flow wireless communication standards such as LTE.
In order to the channel needed for carrying out data demodulation at UE end is estimated and descending channel information
Measure feedback, support the cell common reference letter of maximum 4 ports defined in LTE Rel-8
Number (CRS).In LTE Rel-10, the transmission antenna port that descending MIMO is supported
Number increases to 8.The increase of brought reference signal expense is increased in order to reduce transmission antenna number,
Data demodulation is peeled off from original CRS function by LTE Rel-10, introduces demodulation ginseng
Examine signal (DMRS).DMRS needed for Rel-10UE only needs in the money needing demodulation
Transmission in the block of source, thus decrease tradition in whole system bandwidth, introduce reference signal (RS)
Required expense increases.
In LTE system, compared with single user (UE) MIMO (SU-MIMO), multiplex
Family MIMO (MU-MIMO) is by increasing the UE number of concurrent multiplexing and the flexible of scheduling
Property and the higher availability of frequency spectrum can be obtained.While sending downlink data, eNB is to UE
Send descending control signaling (DCI), for notifying that UE receives the information needed for data, bag
Include order number (rank), antenna port (AP) and the DMRS parameter etc. of necessity.Fig. 1
Showing the descending MU-MIMO of prior art and send example, eNB passes through on same Resource Block
Spatial reuse simultaneously sends data to 4 UE, while send data for each UE to
It sends DCI.
In LTE Rel-10, descending MU-MIMO could support up 4 UE multiplexings, often at present
Most 2 streams (rank 2) of individual UE, system transmits 4 streams (rank 4) the most altogether,
DMRS and DCI is also designed by this requirement.
Particularly, in transmission mode 9 (TM9), DMRS sequence is represented by
Wherein, the value of m is relevant with the RB of descending maximum (Resource Block) quantity, and c (m) is Gold
Sequence, its initial value is
Wherein nsFor timeslot number, NID cellFor community ID, nSCID(DCI is passed through for scramble initial value
Notice).
Resource map on, as a example by dispatching 4UE (every UE rank1), UE1,2 with
UE3,4 DMRS resources use different Port to distinguish, use different OCC to enter between Port
Row code division multiplexing, such as port 7 uses OCC [11], port 8 to use OCC [1-1].With
Again based on n on one portSCIDMake a distinction, i.e. pass through between UE1 and 2, and UE3 and 4
Distribute different nSCIDMake a distinction.The most here UE1 and 2 uses port 7, ue3 and 4
Use port8；Between UE1 and 2, and by distributing different n between UE3 and 4SCIDEnter
Row is distinguished.Fig. 2 is the DMRS that in prior art LTE Rel-10, descending MU-MIMO uses
Resource Mapping Examples, wherein, left side is UE1 and 2, and right side is UE3 and 4.Fig. 3 is existing
There is technology DCI design example.
Under designing by this, in LTE Rel-10, descending MU-MIMO have to meet the most branched
Holding 4 UE multiplexings, most 2 streams (rank 2) of each UE, system is transmitted the most altogether
The restriction of 4 streams (rank 4).If multiplexing (surpasses altogether more than 2 UE on each port
Cross 4 UE multiplexings), will inevitably bring in the conflict of DMRS, i.e. same port
DMRS between different UE is identical, causes DMRS and data to be unable to properly receive.
In order to meet the network traffics (hundreds times as required by 5G increases) of following surge,
Extensive antenna (Massive MIMO) becomes one of following important key technology.Use
After Massive MIMO, system will support 16 to 128,256 even more multiple antennas number.
Under Massive MIMO, the acquisition of performance gain depends on concurrent multiplexing more (substantially exceeding 4)
UE number.In current LTE, the design about DMRS and DCI cannot effectively be supported
Multiplexing more than 4 UE in MU-MIMO, constrains Massive MIMO performance potential
Performance.
Summary of the invention
The technical problem to be solved in the present invention can support arbitrary number UE multiplexing
MU-MIMO。
According to an aspect of the present invention, MIMO downlink demodulation reference signal and signalling are proposed
Method, including:
ENB determines transmission mode according to the feedback information of UE and sends parameter, described transmission
Mode includes single user multiple-input and multiple-output (SU-MIMO) or multi-user's multiple-input and multiple-output
(MU-MIMO)；
Send demodulated reference signal (DMRS) to UE, control signaling (DCI) and thing
Reason DSCH Downlink Shared Channel (PDSCH) data, described control signaling include order number (rank),
Antenna port (port) indicates；
Wherein, use and the DCI of MU-MIMO indicates single codeword or end corresponding to dicode word
Mouth (port), described port is 7-14, it is not necessary to notice scramble initial value (nSCID)；
Using DMRS transmission means during MU-MIMO, the various flows of same UE is just
Hand over multiplex mode, use identical DMRS sequence, and made a distinction by different port；
It is nonopiate multiplex mode between different UE, uses different DMRS sequences, and
And make a distinction according to Termination ID between DMRS sequence.
Further, single codeword correspondence port 7-10, start to map from port7；
Dicode word correspondence port 7-14, starts to map from port 7.
Further, single codeword correspondence port 7-14, start to map from port7 or port11.
Further, dicode word starts to map from port11, jumps to port7 after port14.
Further, also include:
UE carries out channel estimation according to DMRS, reads DCI information, and estimates according to channel
PDSCH is demodulated receiving by meter and DCI result.
According to an aspect of the present invention, MIMO downlink demodulation reference signal and signalling are proposed
Device, including:
Information determination unit, for determining transmission mode and transmission according to the feedback information of UE
Parameter, described transmission mode includes single user multiple-input and multiple-output (SU-MIMO) or multiplex
Family multiple-input and multiple-output (MU-MIMO)；
Transmitting element, for sending demodulated reference signal (DMRS) to UE, control signaling
(DCI) and Physical Downlink Shared Channel (PDSCH) data, described control signaling includes
Order number (rank), antenna port (port) indicate；
Wherein, use and the DCI of MU-MIMO indicates single codeword or end corresponding to dicode word
Mouth (port), described port is 7-14, it is not necessary to notice scramble initial value (nSCID)；
Using DMRS transmission means during MU-MIMO, the various flows of same UE is just
Hand over multiplex mode, use identical DMRS sequence, and made a distinction by different port；
It is nonopiate multiplex mode between different UE, uses different DMRS sequences, and
And make a distinction according to Termination ID between DMRS sequence.
Further, single codeword correspondence port 7-10, start to map from port7；
Dicode word correspondence port 7-14, starts to map from port 7.
Further, single codeword correspondence port 7-14, start to map from port7 or port11.
Further, dicode word starts to map from port11, jumps to port7 after port14.
Further, also include:
UE, for carrying out channel estimation according to DMRS, reads DCI information, and according to letter
Road is estimated and PDSCH is demodulated receiving by DCI result.
In the present invention, can make a distinction according to Termination ID between DMRS sequence, due to
The uniqueness of UE ID, therefore multiplexing UE number is unrestricted.I.e., it is possible to support arbitrary number
The MU-MIMO of UE multiplexing.And, although support more UE multiplexing, but will not increase
Add the overhead on DMRS and DCI.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, the present invention
Further feature and advantage will be made apparent from.
Accompanying drawing explanation
The accompanying drawing of the part constituting specification describes embodiments of the invention, and together with saying
Bright book is together for explaining the principle of the present invention.
Referring to the drawings, according to detailed description below, the present invention can be more clearly understood from,
Wherein:
Fig. 1 show the descending MU-MIMO of prior art and sends example.
Fig. 2 is the DMRS that in prior art LTE Rel-10, descending MU-MIMO uses
Resource Mapping Examples.
Fig. 3 is prior art DCI design example.
Fig. 4 is MIMO downlink demodulation reference signal of the present invention and signal transmission method embodiment
Schematic flow sheet.
Fig. 5 is the DMRS resource Mapping Examples that the descending MU-MIMO of the present invention uses.
Fig. 6 show the schematic diagram of the first embodiment of DCI design.
Fig. 7 show the schematic diagram of the second embodiment of DCI design.
Fig. 8 show the schematic diagram of the 3rd embodiment of DCI design.
Fig. 9 is MIMO downlink demodulation reference signal of the present invention and signalling device embodiment
Structural representation.
Detailed description of the invention
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that
Arrive: unless specifically stated otherwise, the parts illustrated the most in these embodiments and the phase of step
Layout, numerical expression and numerical value are not limited the scope of the invention.
Simultaneously, it should be appreciated that for the ease of describing, the chi of the various piece shown in accompanying drawing
Very little is not to draw according to actual proportionate relationship.
Description only actually at least one exemplary embodiment is illustrative below, certainly
Not as to the present invention and application thereof or any restriction of use.
May not make in detail for technology, method and apparatus known to person of ordinary skill in the relevant
Thin discussion, but in the appropriate case, described technology, method and apparatus should be considered to authorize to be said
A part for bright book.
Shown here with in all examples discussed, any occurrence should be construed as merely
Exemplary rather than conduct limits.Therefore, other example of exemplary embodiment can have
There is different values.
It should also be noted that similar label and letter expression similar terms in following accompanying drawing, therefore,
The most a certain Xiang Yi accompanying drawing is defined, then need not it is carried out in accompanying drawing subsequently
Discussed further.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with tool
Body embodiment, and referring to the drawings, the present invention is described in more detail.
In order to effectively support the multiplexing of more UE in MU-MIMO, the present invention gives
A kind of new DMRS and DCI method for designing.Compared with prior art, the inventive method
Benefit is to support the MU-MIMO of arbitrary number UE multiplexing, becomes performance Massive
The prerequisite of MIMO performance potential.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Fig. 4 is MIMO downlink demodulation reference signal of the present invention and signal transmission method embodiment
Schematic flow sheet, including:
In step 410, eNB determines transmission mode according to the feedback information of UE and sends ginseng
Number, described transmission mode includes single user multiple-input and multiple-output (SU-MIMO) or multi-user
Multiple-input and multiple-output (MU-MIMO).
In step 420, send demodulated reference signal (DMRS) to UE, control signaling (DCI)
And Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel)
Data, described control signaling includes that order number (rank), antenna port (port) indicate.
Wherein, DCI is designed:
Use and the DCI of MU-MIMO indicates single codeword or port corresponding to dicode word
(port), described port is 7-14, it is not necessary to notice scramble initial value (nSCID).Code word refers to
Be encoding block, single codeword refer to this TTI give this UE pass be an encoding block,
What dicode word referred to pass to this UE at this TTI is two encoding blocks (different code blocks codings
Modulation system can be different).
DMRS is designed:
Under SU-MIMO, DMRS design keeps identical with LTE Rel-10.Due to UE
The antenna number that end is supported is limited, and its most fluxions received are identical, i.e. with under LTE Rel-10
It is 8.
Under MU-MIMO, DMRS uses the resource mapping method identical with SU-MIMO,
The most at most taking number of resources is 24 Resource Units (RE)/Resource Block (RB), corresponding ports (port)
7-14.Fig. 5 is the DMRS resource Mapping Examples that the descending MU-MIMO of the present invention uses.
The corresponding same running time-frequency resource of Port 7-10, uses different orthogonal mask (OCC) district of a length of 4
Point, counterpart terminal 1,2,3；Port 11-14 another running time-frequency resource corresponding, between use difference
OCC distinguishes, counterpart terminal 4,5,6.
Using DMRS transmission means during MU-MIMO, the various flows of same UE is just
Hand over multiplex mode, use identical DMRS sequence, and made a distinction by different port.
Different OCC corresponding for port are given by existing system.OCC uses the mode of CDMA in fact
Orthogonality between existing port.
It is nonopiate multiplex mode between different UE, uses different DMRS sequences, and
And according to Termination ID (n between DMRS sequenceRNTI) make a distinction, i.e. initial value
In this embodiment, can make a distinction according to Termination ID between DMRS sequence, by
In the uniqueness of UE ID, therefore multiplexing UE number is unrestricted.I.e., it is possible to support Arbitrary Digit
The MU-MIMO of mesh UE multiplexing.And, although support more UE multiplexing, but will not
Increase the overhead on DMRS and DCI.
In an alternative embodiment of the invention, the method can also comprise the steps:
UE carries out channel estimation according to DMRS, reads DCI information, and estimates according to channel
PDSCH is demodulated receiving by meter and DCI result.
ENB notifies user by DCI information, after UE receives DCI, has first checked several
Individual code word (conventional method), is such as 2 code words；UE checks MU-MIMO information again.
It is " 001 " as received, as with reference to the most corresponding port7-9 of Fig. 5.Different resources corresponding for port
Position and OCC are fixed by system, and therefore UE is only it is to be understood that No. port it is known that concrete
Information.
Below by the drawings and specific embodiments, DCI design is described in detail.
Fig. 6 show the schematic diagram of the first embodiment of DCI design.
Single codeword correspondence port 7-10, starts to map from port7；
Dicode word correspondence port 7-14, starts to map from port 7.
Fig. 7 show the schematic diagram of the second embodiment of DCI design.
Adding port 11-14 during single codeword, corresponding port 7-14, from port7 or port11
Start to map；
Being advantageous in that increase scheduling freedom, (UE will in the past to reduce the interference to former UE
More likely use port 7-10 resource).
Fig. 8 show the schematic diagram of the 3rd embodiment of DCI design.
Dicode word correspondence port 7-14, starts to map from port11, jumps to port7 after port14.
It is advantageous in that the interference reduced former UE.
Below by specific embodiment, the present invention will be further described.
Under Massive MIMO, eNB feeds back according to the descending channel information of each UE, enters
Row scheduling and data are transmitted.Assume, at certain transmission time interval (TTI), have 6 UE
(UE1 ..., UE6) the scheduled MU-MIMO transmission that carries out, UE 1/2/3 is allocated to be sent out
The number sending stream is 4 (rank 4), and the allocated number sending stream of UE 4/5/6 is 1 (rank
1).Due to the restriction in DMRS and DCI design, this scheduling result in Rel-10 not by
Support.In embodiments of the present invention, eNB uses following DMRS and DCI design to carry out
Transmission and notice.UE, according to the DCI information acquisition DMRS relevant parameter obtained, counts
According to solution be in harmonious proportion receive.
DMRS designs
Under SU-MIMO, DMRS design keeps identical with LTE Rel-10.Due to UE
The antenna number that end is supported is limited, and its most fluxions received are identical, i.e. with under LTE Rel-10
It is 8.
Under MU-MIMO, DMRS uses the resource mapping method identical with SU-MIMO,
The most at most taking number of resources is 24 Resource Units (RE)/Resource Block (RB), corresponding ports (port)
7-14.The corresponding same running time-frequency resource of Port 7-10, uses the different orthogonal mask (OCC) of a length of 4
Distinguish；Port 11-14 another running time-frequency resource corresponding, between use different OCC to distinguish.
The various flows of same UE use orthogonal multiplex mode (identical DMRS sequence, no
Same port makes a distinction).As shown in Figure 5, when DMRS resource maps, same UE
Various flows be mapped to different ports, 4 streams of such as UE 1/2/3 are respectively mapped to port
7,8,9,10 (corresponding OCC sequence is [1,1,1,1], [1,1 ,-1 ,-1], [1 ,-1,1 ,-1] and
[1 ,-1 ,-1,1]), and the 1 of UE 4/5/6 stream is mapped to port 11 (corresponding OCC sequence
It is classified as [1,1,1,1]).
Different UE use nonopiate multiplex modes (different DMRS sequences, DMRS it
Between according to UE ID i.e. nRNTIMake a distinction), i.e.
DCI designs
Design with DMRS is corresponding, without notifying n in DCISCID。
Method one: single codeword correspondence port 7-10, starts to map from port7；Dicode word is corresponding
Port 7-14, starts to map from port 7.
Method two: add port 11-14, corresponding port 7-14 during single codeword, from port7 or
Person port11 starts to map.It is advantageous in that increase scheduling freedom, reduces and former UE is done
Disturb (UE will be more likely to use port 7-10 resource in the past).
DMRS resource allocation example corresponding for Fig. 5 is DCI based on Fig. 7 design.Now
The corresponding double codeword transmission of UE 1/2/3, corresponding DCI is " 2 " in Fig. 6 right half part,
And UE 4/5/6 corresponding single codeword transmission, corresponding DCI is " 4 " in Fig. 7 left-half.
Method three: dicode word correspondence port 7-14, starts to map, after port14 from port11
Jump to port7, be advantageous in that the interference reduced former UE.
Fig. 9 is MIMO downlink demodulation reference signal of the present invention and signalling device embodiment
Structural representation, this device includes: information determination unit 910 and transmitting element 920,
Information determination unit 910 and transmitting element 920 can be arranged on eNB (base station).Wherein:
Information determination unit 910, for according to the feedback information of UE determine transmission mode and
Send parameter, described transmission mode include single user multiple-input and multiple-output (SU-MIMO) or
Multi-user's multiple-input and multiple-output (MU-MIMO).
Transmitting element 920, for sending demodulated reference signal (DMRS) to UE, control
Signaling (DCI) and Physical Downlink Shared Channel (PDSCH) data, described control signaling
Including order number (rank), antenna port (port) instruction.
Wherein, DCI is designed:
Use and the DCI of MU-MIMO indicates single codeword or port corresponding to dicode word
(port), described port is 7-14, it is not necessary to notice scramble initial value (nSCID).Code word refers to
Be encoding block, single codeword refer to this TTI give this UE pass be an encoding block,
What dicode word referred to pass to this UE at this TTI is two encoding blocks (different code blocks codings
Modulation system can be different).
DMRS is designed:
Under SU-MIMO, DMRS design keeps identical with LTE Rel-10.Due to UE
The antenna number that end is supported is limited, and its most fluxions received are identical, i.e. with under LTE Rel-10
It is 8.
Under MU-MIMO, DMRS uses the resource mapping method identical with SU-MIMO,
The most at most taking number of resources is 24 Resource Units (RE)/Resource Block (RB), corresponding ports (port)
7-14.Fig. 5 is the DMRS resource Mapping Examples that the descending MU-MIMO of the present invention uses.
The corresponding same running time-frequency resource of Port 7-10, uses different orthogonal mask (OCC) district of a length of 4
Point, counterpart terminal 1,2,3；Port 11-14 another running time-frequency resource corresponding, between use difference
OCC distinguishes, counterpart terminal 4,5,6.
Using DMRS transmission means during MU-MIMO, the various flows of same UE is just
Hand over multiplex mode, use identical DMRS sequence, and made a distinction by different port.
Different OCC corresponding for port are given by existing system.OCC uses the mode of CDMA in fact
Orthogonality between existing port.
It is nonopiate multiplex mode between different UE, uses different DMRS sequences, and
And according to Termination ID (n between DMRS sequenceRNTI) make a distinction, i.e. initial value
In this embodiment, can make a distinction according to Termination ID between DMRS sequence, by
In the uniqueness of UE ID, therefore multiplexing UE number is unrestricted.I.e., it is possible to support Arbitrary Digit
The MU-MIMO of mesh UE multiplexing.And, although support more UE multiplexing, but will not
Increase the overhead on DMRS and DCI.
In an alternative embodiment of the invention, this device can also include:
UE 930, for carrying out channel estimation according to DMRS, reads DCI information, and root
It is believed that PDSCH is demodulated receiving by estimation and DCI result.
ENB notifies user by DCI information, after UE receives DCI, has first checked several
Individual code word (conventional method), is such as 2 code words；UE checks MU-MIMO information again.
It is " 001 " as received, as with reference to the most corresponding port7-9 of Fig. 5.Different resources corresponding for port
Position and OCC are fixed by system, and therefore UE is only it is to be understood that No. port it is known that concrete
Information.
Below by the drawings and specific embodiments, DCI design is described in detail.
First embodiment
Single codeword correspondence port 7-10, starts to map from port7；
Dicode word correspondence port 7-14, starts to map from port 7.As shown in Figure 6.
Second embodiment
Adding port 11-14 during single codeword, corresponding port 7-14, from port7 or port11
Start to map；
Being advantageous in that increase scheduling freedom, (UE will in the past to reduce the interference to former UE
More likely use port 7-10 resource).As shown in Figure 7.
3rd embodiment
Dicode word correspondence port 7-14, starts to map from port11, jumps to port7 after port14.
It is advantageous in that the interference reduced former UE.As shown in Figure 8.
So far, the present invention is described in detail.In order to avoid covering the design of the present invention, do not have
It is described details more known in the field.Those skilled in the art as described above,
Completely it can be appreciated how implement technical scheme disclosed herein.
Method and the device of the present invention may be achieved in many ways.Such as, can be by soft
Part, hardware, firmware or software, hardware, any combination of firmware realize the side of the present invention
Method and device.For the said sequence of step of described method merely to illustrate, this
The step of the method for invention is not limited to order described in detail above, the most especially
Explanation.Additionally, in certain embodiments, also can be embodied as the present invention recording at record medium
In program, these programs include the machine readable instructions for realizing the method according to the invention.
Thus, the present invention also covers the record of the program for performing the method according to the invention that stores and is situated between
Matter.
Although some specific embodiments of the present invention being described in detail by example,
But it should be appreciated by those skilled in the art, above example is not merely to illustrate, and not
It is to limit the scope of the present invention.It should be appreciated by those skilled in the art, can without departing from
In the case of scope and spirit of the present invention, above example is modified.The model of the present invention
Enclose and be defined by the following claims.
Claims (10)
1.MIMO downlink demodulation reference signal and signal transmission method, including:
ENB determines transmission mode according to the feedback information of UE and sends parameter, described transmission
Mode includes single user multiple-input and multiple-output (SU-MIMO) or multi-user's multiple-input and multiple-output
(MU-MIMO)；
Send demodulated reference signal (DMRS) to UE, control signaling (DCI) and thing
Reason DSCH Downlink Shared Channel (PDSCH) data, described control signaling include order number (rank),
Antenna port (port) indicates；
Wherein, use and the DCI of MU-MIMO indicates single codeword or end corresponding to dicode word
Mouth (port), described port is 7-14, it is not necessary to notice scramble initial value (nSCID)；
Using DMRS transmission means during MU-MIMO, the various flows of same UE is just
Hand over multiplex mode, use identical DMRS sequence, and made a distinction by different port；
It is nonopiate multiplex mode between different UE, uses different DMRS sequences, and
And make a distinction according to Termination ID between DMRS sequence.
MIMO downlink demodulation reference signal and signalling side the most according to claim 1
Method, including:
Single codeword correspondence port 7-10, starts to map from port7；
Dicode word correspondence port 7-14, starts to map from port 7.
MIMO downlink demodulation reference signal and signalling side the most according to claim 2
Method, including:
Single codeword correspondence port 7-14, starts to map from port7 or port11.
4. pass according to MIMO downlink demodulation reference signal described in Claims 2 or 3 and signaling
Transmission method, including:
Dicode word starts to map from port11, jumps to port7 after port14.
5. according to the arbitrary described MIMO downlink demodulation reference signal of Claims 1-4 and letter
Make transmission method, also include:
UE carries out channel estimation according to DMRS, reads DCI information, and estimates according to channel
PDSCH is demodulated receiving by meter and DCI result.
6.MIMO downlink demodulation reference signal and signalling device, including:
Information determination unit, for determining transmission mode and transmission according to the feedback information of UE
Parameter, described transmission mode includes single user multiple-input and multiple-output (SU-MIMO) or multiplex
Family multiple-input and multiple-output (MU-MIMO)；
Transmitting element, for sending demodulated reference signal (DMRS) to UE, control signaling
(DCI) and Physical Downlink Shared Channel (PDSCH) data, described control signaling includes
Order number (rank), antenna port (port) indicate；
Wherein, use and the DCI of MU-MIMO indicates single codeword or end corresponding to dicode word
Mouth (port), described port is 7-14, it is not necessary to notice scramble initial value (nSCID)；
Using DMRS transmission means during MU-MIMO, the various flows of same UE is just
Hand over multiplex mode, use identical DMRS sequence, and made a distinction by different port；
It is nonopiate multiplex mode between different UE, uses different DMRS sequences, and
And make a distinction according to Termination ID between DMRS sequence.
MIMO downlink demodulation reference signal and signalling dress the most according to claim 6
Put, including:
Single codeword correspondence port 7-10, starts to map from port7；
Dicode word correspondence port 7-14, starts to map from port 7.
MIMO downlink demodulation reference signal and signalling dress the most according to claim 6
Put, including:
Single codeword correspondence port 7-14, starts to map from port7 or port11.
MIMO downlink demodulation reference signal and signalling dress the most according to claim 6
Put, including:
Dicode word starts to map from port11, jumps to port7 after port14.
10. according to the arbitrary described MIMO downlink demodulation reference signal of claim 6 to 9 and
Signalling device, also includes:
UE, for carrying out channel estimation according to DMRS, reads DCI information, and according to letter
Road is estimated and PDSCH is demodulated receiving by DCI result.
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Cited By (13)
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| CN110855329A (en) * | 2018-08-20 | 2020-02-28 | 电信科学技术研究院有限公司 | Method and device for determining codeword mapping mode |
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| CN112312552A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Data transmission method, device and system |
| WO2021128022A1 (en) * | 2019-12-24 | 2021-07-01 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device and network device |
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