CN105790814B - MIMO downlink demodulation reference signal and signal transmission method and device - Google Patents
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Abstract
The invention discloses MIMO downlink demodulation reference signals and signal transmission method and device.It include: that eNB determines sending method according to the feedback information of UE and sends parameter, described sender formula includes SU-MIMO or MU-MIMO；DMRS, DCI are sent to UE, the DCI includes port instruction；Single codeword or the corresponding port of dicode word are indicated in DCI, without notifying scramble initial value；In DMRS transmission mode, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, using identical DMRS sequence, is distinguished by different port；It is distinguished between DMRS sequence according to Termination ID for non-orthogonal multiplexing mode using different DMRS sequences between different UE.In the present invention, due to the uniqueness of Termination ID, multiplex terminal number is unrestricted, can support arbitrary number terminal multiplexing.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to MIMO downlink demodulation reference signals and signal transmission method
With device.
Background technique
Multiple-input and multiple-output (MIMO) technology of multiple antennas space resources, due to its wireless communication transmissions reliability and
The great potential that rate is promoted, has become the core technology of such as 3GPP LTE mainstream wireless communication standard.
For the measurement feedback of channel estimation and descending channel information needed for the end UE progress data demodulation, LTE
The cell common reference signal (CRS) for supporting maximum 4 ports is defined in Rel-8.In LTE Rel-10, downlink MIMO institute
The transmission antenna port number of support increases to 8.In order to reduce the increase that transmission antenna number increases brought reference signal expense,
Data demodulation is removed from original CRS function in LTE Rel-10, introduces demodulated reference signal (DMRS).Rel-10UE
Required DMRS only needs the transmitted within resource blocks demodulated in needs, so that reduce tradition introduces ginseng in whole system bandwidth
Expense needed for examining signal (RS) increases.
In LTE system, compared with single user (UE) MIMO (SU-MIMO), multiuser MIMO (MU-MIMO) is same by increasing
The UE number of Shi Fuyong and the flexibility of scheduling and the higher availability of frequency spectrum can be obtained.While sending downlink data,
ENB sends descending control signaling (DCI) to UE, for information needed for notifying UE to receive data, including rank number (rank), antenna
Port (AP) and necessary DMRS parameter etc..Fig. 1 show prior art downlink MU-MIMO and sends example, and eNB is same
Data are sent to 4 UE simultaneously by spatial reuse on resource block, are sent to it DCI while sending data for each UE.
Downlink MU-MIMO could support up 4 UE multiplexing in LTE Rel-10 at present, each most 2 streams (rank 2) of UE,
System at most transmits 4 streams (rank 4) in total, and DMRS and DCI are also designed by this requirement.
Particularly, in transmission mode 9 (TM9), DMRS sequence is represented by
Wherein, value with downlink maximum RB (resource block) quantity of m is related, and c (m) is Gold sequence, and initial value is
Wherein nsFor timeslot number, NID cellFor cell ID, nSCIDIt (is notified by DCI) for scramble initial value.
In resource impact, for dispatching 4UE (every UE rank1), UE1,2 and UE3,4 DMRS resources are using different
Port is distinguished, and carries out code division multiplexing using different OCC between Port, for example port 7 uses OCC [11], and port 8 uses OCC [1-
1].N is based on same port againSCIDIt distinguishes, i.e. by distributing different n between UE1 and 2 and UE3 and 4SCIDCarry out area
Point.For example UE1 and 2 uses port 7, ue3 and 4 to use port8 here；Pass through distribution difference between UE1 and 2 and between UE3 and 4
NSCIDIt distinguishes.Fig. 2 is the DMRS resource impact example that downlink MU-MIMO is used in prior art LTE Rel-10,
In, left side is UE1 and 2, and right side is UE3 and 4.Fig. 3 is prior art DCI design example.
It could support up 4 UE multiplexings, each UE by downlink MU-MIMO has to meet under this design, in LTE Rel-10
Most 2 streams (rank 2), system at most transmit the limitation of 4 streams (rank 4) in total.If multiplexing is more than 2 on each port
A UE (more than 4 UE multiplexings in total), will inevitably bring the conflict of DMRS, i.e., the DMRS on same port between difference UE
It is identical, cause DMRS and data to be unable to properly receive.
In order to meet the network flow (hundreds times of growths as required by 5G) of the following surge, extensive antenna (Massive
MIMO) become following important one of the key technology.After Massive MIMO, system will be supported 16 to 128,256 even
More antennas number.UE number of the acquisition of performance gain dependent on concurrent multiplexing more (substantially exceeding 4) under Massive MIMO.When
Design in preceding LTE about DMRS and DCI can not effectively be supported to constrain Massive more than the multiplexing of 4 UE in MU-MIMO
The performance of MIMO performance potential.
Summary of the invention
The MU-MIMO that the technical problem to be solved by the present invention is to arbitrary number UE can be supported to be multiplexed.
According to an aspect of the present invention, MIMO downlink demodulation reference signal and signal transmission method are proposed, comprising:
ENB determines sending method according to the feedback information of UE and sends parameter, and described sender formula includes that single user is more
Input multi output (SU-MIMO) or multi-user's multiple-input and multiple-output (MU-MIMO)；
Demodulated reference signal (DMRS), control signaling (DCI) and Physical Downlink Shared Channel (PDSCH) number are sent to UE
According to the control signaling includes rank number (rank), antenna port (port) instruction；
Wherein, it is using instruction single codeword or the corresponding port of dicode word (port), the port in the DCI of MU-MIMO
7-14, without notifying scramble initial value (nSCID)；
DMRS transmission mode when using MU-MIMO, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, and use is identical
DMRS sequence, and distinguished by different port；
It is non-orthogonal multiplexing mode between different UE, using different DMRS sequences, and according to end between DMRS sequence
End ID is distinguished.
Further, single codeword corresponds to port 7-10, maps since port7；
Dicode word corresponds to port 7-14, maps since port 7.
Further, single codeword corresponds to port 7-14, maps since port7 or port11.
Further, dicode word is mapped since port11, and port7 is jumped to after port14.
Further, further includes:
UE carries out channel estimation according to DMRS, reads DCI information, and carry out to PDSCH according to channel estimation and DCI result
Demodulation receives.
According to an aspect of the present invention, MIMO downlink demodulation reference signal and signalling device are proposed, comprising:
Information determination unit determines sending method for the feedback information according to UE and sends parameter, described sender
Formula includes single user multiple-input and multiple-output (SU-MIMO) or multi-user's multiple-input and multiple-output (MU-MIMO)；
Transmission unit, it is shared for sending demodulated reference signal (DMRS), control signaling (DCI) and physical down to UE
Channel (PDSCH) data, the control signaling include rank number (rank), antenna port (port) instruction；
Wherein, it is using instruction single codeword or the corresponding port of dicode word (port), the port in the DCI of MU-MIMO
7-14, without notifying scramble initial value (nSCID)；
DMRS transmission mode when using MU-MIMO, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, and use is identical
DMRS sequence, and distinguished by different port；
It is non-orthogonal multiplexing mode between different UE, using different DMRS sequences, and according to end between DMRS sequence
End ID is distinguished.
Further, single codeword corresponds to port 7-10, maps since port7；
Dicode word corresponds to port 7-14, maps since port 7.
Further, single codeword corresponds to port 7-14, maps since port7 or port11.
Further, dicode word is mapped since port11, and port7 is jumped to after port14.
Further, further includes:
UE reads DCI information, and according to channel estimation and DCI result pair for carrying out channel estimation according to DMRS
PDSCH carries out demodulation reception.
In the present invention, it can be distinguished according to Termination ID between DMRS sequence, due to the uniqueness of UE ID,
It is unrestricted to be multiplexed UE number.I.e., it is possible to the MU-MIMO for supporting arbitrary number UE to be multiplexed.Although also, supporting that more UE are multiple
With, but not increase the overhead on DMRS and DCI.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
The attached drawing for constituting part of specification describes the embodiment of the present invention, and together with the description for solving
Release the principle of the present invention.
The present invention can be more clearly understood according to following detailed description referring to attached drawing, in which:
Fig. 1 show prior art downlink MU-MIMO and sends example.
Fig. 2 is the DMRS resource impact example that downlink MU-MIMO is used in prior art LTE Rel-10.
Fig. 3 is prior art DCI design example.
Fig. 4 is the flow diagram of MIMO downlink demodulation reference signal and signal transmission method embodiment of the present invention.
Fig. 5 is the DMRS resource impact example that downlink MU-MIMO of the present invention is used.
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 the structural schematic diagram of MIMO downlink demodulation reference signal and signalling Installation practice of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality
Proportionate relationship draw.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
In order to effectively support the multiplexing of more UE in MU-MIMO, a kind of new DMRS and DCI design is given in the present invention
Method.Compared with prior art, the benefit of the method for the present invention is the MU-MIMO that arbitrary number UE can be supported to be multiplexed, and becomes hair
Wave the prerequisite of Massive MIMO performance potential.
Below in conjunction with drawings and examples, invention is further described in detail.
Fig. 4 is the flow diagram of MIMO downlink demodulation reference signal and signal transmission method embodiment of the present invention, comprising:
In step 410, eNB determines sending method according to the feedback information of UE and sends parameter, described sender formula packet
Include single user multiple-input and multiple-output (SU-MIMO) or multi-user's multiple-input and multiple-output (MU-MIMO).
In step 420, demodulated reference signal (DMRS), control signaling (DCI) and the shared letter of physical down are sent to UE
Road (PDSCH, Physical Downlink Shared Channel) data, the control signaling includes rank number (rank), day
Line end mouth (port) instruction.
Wherein, DCI is designed:
Using instruction single codeword or the corresponding port of dicode word (port) in the DCI of MU-MIMO, the port is 7-14,
Without notifying scramble initial value (nSCID).Code word refers to encoding block, and what single codeword referred to passing in this TTI to the UE is one
A encoding block, what dicode word referred to passing in this TTI to the UE is that (different code block code modulation modes can be with for two encoding blocks
It is different).
DMRS is designed:
Under SU-MIMO, DMRS design keeps identical as LTE Rel-10.Since the antenna number that the end UE is supported is limited,
Received most fluxions are identical as under LTE Rel-10, and as 8.
Under MU-MIMO, DMRS uses resource mapping method identical with SU-MIMO, i.e., at most occupying number of resources is 24 moneys
Source unit (RE)/resource block (RB), corresponding ports (port) 7-14.Fig. 5 is the DMRS resource that downlink MU-MIMO of the present invention is used
Mapping Examples.Port 7-10 corresponds to same running time-frequency resource, is distinguished using a length of 4 different orthogonal mask (OCC), counterpart terminal
1,2,3；Port 11-14 corresponds to another running time-frequency resource, between using different OCC distinguish, counterpart terminal 4,5,6.
DMRS transmission mode when using MU-MIMO, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, and use is identical
DMRS sequence, and distinguished by different port.The corresponding OCC of different port is given by existing system.OCC is using code point
The mode of multiple access realizes the orthogonality between port.
It is non-orthogonal multiplexing mode between different UE, using different DMRS sequences, and according to end between DMRS sequence
Hold ID (nRNTI) distinguish, i.e. initial value
In this embodiment, it can be distinguished according to Termination ID between DMRS sequence, due to the uniqueness of UE ID, because
This multiplexing UE number is unrestricted.I.e., it is possible to the MU-MIMO for supporting arbitrary number UE to be multiplexed.Although also, supporting that more UE are multiple
With, but not increase the overhead on DMRS and DCI.
In an alternative embodiment of the invention, this method can also include the following steps:
UE carries out channel estimation according to DMRS, reads DCI information, and carry out to PDSCH according to channel estimation and DCI result
Demodulation receives.
ENB notifies user by DCI information, after UE receives DCI, has first checked several code words (conventional method), such as
It is 2 code words；UE checks MU-MIMO information again.Such as receiving is " 001 ", such as with reference to the i.e. corresponding port7-9 of Fig. 5.Different port pairs
The resource location and OCC answered are fixed by system, therefore UE is only it is to be understood that No. port it is known that specifying 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 corresponds to port 7-10, maps since port7；
Dicode word corresponds to port 7-14, maps since port 7.
Fig. 7 show the schematic diagram of the second embodiment of DCI design.
Port 11-14 is added when single codeword, corresponding port 7-14 is mapped since port7 or port11；
It is advantageous in that increase scheduling freedom, (UE will be more likely to using port 7- in the past for interference of the reduction to former UE
10 resources).
Fig. 8 show the schematic diagram of the 3rd embodiment of DCI design.
Dicode word corresponds to port 7-14, maps since port11, and port7 is jumped to after port14.It is advantageous in that reduction
Interference to former UE.
Below by specific embodiment, the present invention will be further described.
Under Massive MIMO, eNB is fed back according to the descending channel information of each UE, is scheduled and is transmitted with data.It is false
It is located at some transmission time interval (TTI), there are 6 UE (UE1 ..., UE6) to be scheduled carry out MU-MIMO transmission, UE 1/2/3
Being assigned and sending the number of stream is 4 (rank 4), and it is 1 (rank1) that UE 4/5/6, which is assigned and sends the number of stream,.Due to DMRS and
Limitation in DCI design, this scheduling result are not supported in Rel-10.In embodiments of the present invention, eNB is using below
DMRS and DCI design is transmitted and is notified.UE carries out the solution of data according to the DCI information acquisition DMRS relevant parameter of acquisition
It reconciles and receives.
DMRS design
Under SU-MIMO, DMRS design keeps identical as LTE Rel-10.Since the antenna number that the end UE is supported is limited,
Received most fluxions are identical as under LTE Rel-10, and as 8.
Under MU-MIMO, DMRS uses resource mapping method identical with SU-MIMO, i.e., at most occupying number of resources is 24 moneys
Source unit (RE)/resource block (RB), corresponding ports (port) 7-14.Port 7-10 corresponds to same running time-frequency resource, using a length of 4
Different orthogonal mask (OCC) distinguish；Port 11-14 corresponds to another running time-frequency resource, between using different OCC distinguish.
The not cocurrent flow of same UE uses orthogonal multiplexing mode (identical DMRS sequence, different port are distinguished).?
In shown in Fig. 5, when DMRS resource impact, the not cocurrent flow of same UE is mapped to different ports, such as 4 flow points of UE 1/2/3
Be not mapped to port 7,8,9,10 (corresponding OCC sequence be [1,1,1,1], [1,1, -1, -1], [1, -1,1, -1] and [1, -
1, -1,1]), and 1 stream of UE 4/5/6 is mapped to port 11 (corresponding OCC sequence be [1,1,1,1]).
Different UE are using non-orthogonal multiplexing mode (different DMRS sequence, according to UE ID, that is, n between DMRSRNTICarry out area
Point), i.e.,
DCI design
It is corresponding with the design of DMRS, without notifying n in DCISCID。
Method one: single codeword corresponds to port 7-10, maps since port7；Dicode word corresponds to port 7-14, from port
7 start to map.
Method two: being added port 11-14 when single codeword, corresponding port 7-14 is reflected since port7 or port11
It penetrates.It is advantageous in that increase scheduling freedom, (UE will be more likely to provide using port 7-10 in the past for interference of the reduction to former UE
Source).
The corresponding DMRS resource allocation example of Fig. 5 is the DCI design based on Fig. 7.The corresponding dicode word of UE 1/2/3 passes at this time
Defeated, corresponding DCI is " 2 " in Fig. 6 right half part, and the corresponding single codeword transmission of UE 4/5/6, corresponding DCI are Fig. 7 left half
" 4 " in part.
Method three: dicode word corresponds to port 7-14, maps since port11, and port7, benefit are jumped to after port14
It is to reduce the interference to former UE.
Fig. 9 is the structural schematic diagram of MIMO downlink demodulation reference signal and signalling Installation practice of the present invention, the dress
Setting includes: information determination unit 910 and transmission unit 920, and information determination unit 910 and transmission unit 920 can be set
In eNB (base station).Wherein:
Information determination unit 910 determines sending method for the feedback information according to UE and sends parameter, the transmission
Mode includes single user multiple-input and multiple-output (SU-MIMO) or multi-user's multiple-input and multiple-output (MU-MIMO).
Transmission unit 920, for sending demodulated reference signal (DMRS), control signaling (DCI) and physical down to UE
Shared channel (PDSCH) data, the control signaling include rank number (rank), antenna port (port) instruction.
Wherein, DCI is designed:
Using instruction single codeword or the corresponding port of dicode word (port) in the DCI of MU-MIMO, the port is 7-14,
Without notifying scramble initial value (nSCID).Code word refers to encoding block, and what single codeword referred to passing in this TTI to the UE is one
A encoding block, what dicode word referred to passing in this TTI to the UE is that (different code block code modulation modes can be with for two encoding blocks
It is different).
DMRS is designed:
Under SU-MIMO, DMRS design keeps identical as LTE Rel-10.Since the antenna number that the end UE is supported is limited,
Received most fluxions are identical as under LTE Rel-10, and as 8.
Under MU-MIMO, DMRS uses resource mapping method identical with SU-MIMO, i.e., at most occupying number of resources is 24 moneys
Source unit (RE)/resource block (RB), corresponding ports (port) 7-14.Fig. 5 is the DMRS resource that downlink MU-MIMO of the present invention is used
Mapping Examples.Port 7-10 corresponds to same running time-frequency resource, is distinguished using a length of 4 different orthogonal mask (OCC), counterpart terminal
1,2,3；Port 11-14 corresponds to another running time-frequency resource, between using different OCC distinguish, counterpart terminal 4,5,6.
DMRS transmission mode when using MU-MIMO, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, and use is identical
DMRS sequence, and distinguished by different port.The corresponding OCC of different port is given by existing system.OCC is using code point
The mode of multiple access realizes the orthogonality between port.
It is non-orthogonal multiplexing mode between different UE, using different DMRS sequences, and according to end between DMRS sequence
Hold ID (nRNTI) distinguish, i.e. initial value
In this embodiment, it can be distinguished according to Termination ID between DMRS sequence, due to the uniqueness of UE ID, because
This multiplexing UE number is unrestricted.I.e., it is possible to the MU-MIMO for supporting arbitrary number UE to be multiplexed.Although also, supporting that more UE are multiple
With, but not increase the overhead on DMRS and DCI.
In an alternative embodiment of the invention, which can also include:
UE 930 reads DCI information, and according to channel estimation and DCI result pair for carrying out channel estimation according to DMRS
PDSCH carries out demodulation reception.
ENB notifies user by DCI information, after UE receives DCI, has first checked several code words (conventional method), such as
It is 2 code words；UE checks MU-MIMO information again.Such as receiving is " 001 ", such as with reference to the i.e. corresponding port7-9 of Fig. 5.Different port pairs
The resource location and OCC answered are fixed by system, therefore UE is only it is to be understood that No. port it is known that specifying information.
Below by the drawings and specific embodiments, DCI design is described in detail.
First embodiment
Single codeword corresponds to port 7-10, maps since port7；
Dicode word corresponds to port 7-14, maps since port 7.As shown in Figure 6.
Second embodiment
Port 11-14 is added when single codeword, corresponding port 7-14 is mapped since port7 or port11；
It is advantageous in that increase scheduling freedom, (UE will be more likely to using port 7- in the past for interference of the reduction to former UE
10 resources).As shown in Figure 7.
3rd embodiment
Dicode word corresponds to port 7-14, maps since port11, and port7 is jumped to after port14.It is advantageous in that reduction
Interference to former UE.As shown in Figure 8.
So far, the present invention is described in detail.In order to avoid covering design of the invention, it is public that this field institute is not described
The some details known.Those skilled in the art as described above, completely it can be appreciated how implementing technology disclosed herein
Scheme.
Method and device of the invention may be achieved in many ways.For example, can by software, hardware, firmware or
Person's software, hardware, firmware any combination realize method and device of the invention.The step of for the method it is above-mentioned
Sequence is merely to be illustrated, and the step of method of the invention is not limited to sequence described in detail above, unless with other sides
Formula illustrates.In addition, in some embodiments, the present invention can be also embodied as recording program in the recording medium, these
Program includes for realizing machine readable instructions according to the method for the present invention.Thus, the present invention also covers storage for executing
The recording medium of program according to the method for the present invention.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that above example merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1.MIMO downlink demodulation reference signal and signal transmission method, comprising:
ENB determines sending method according to the feedback information of UE and sends parameter, and described sender formula includes single user multi input
Multi output SU-MIMO or multi-user's multiple-input and multiple-output MU-MIMO；
Demodulated reference signal DMRS, control signaling DCI and Physical Downlink Shared Channel PDSCH data, the control are sent to UE
Signaling processed includes rank number rank, antenna port port instruction；
Wherein, using single codeword or the corresponding port port of dicode word is indicated in the DCI of MU-MIMO, the port is 7-14, nothing
It need to notify scramble initial value nSCID；
DMRS transmission mode when using MU-MIMO, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, using identical DMRS sequence
Column, and distinguished by different port；
It is non-orthogonal multiplexing mode between different UE, using different DMRS sequences, and according to Termination ID between DMRS sequence
It distinguishes.
2. MIMO downlink demodulation reference signal and signal transmission method according to claim 1, comprising:
Single codeword corresponds to port 7-10, maps since port7；
Dicode word corresponds to port 7-14, maps since port 7.
3. MIMO downlink demodulation reference signal and signal transmission method according to claim 1, comprising:
Single codeword corresponds to port 7-14, maps since port7 or port11.
4. MIMO downlink demodulation reference signal and signal transmission method according to claim 1, comprising:
Dicode word is mapped since port11, and port7 is jumped to after port14.
5. according to claim 1 to 4 any MIMO downlink demodulation reference signals and signal transmission method, further includes:
UE carries out channel estimation according to DMRS, reads DCI information, and demodulate to PDSCH according to channel estimation and DCI result
It receives.
6.MIMO downlink demodulation reference signal and signalling device, comprising:
Information determination unit determines sending method for the feedback information according to UE and sends parameter, described sender formula packet
Include single user multiple-input and multiple-output SU-MIMO or multi-user's multiple-input and multiple-output MU-MIMO；
Transmission unit, for sending demodulated reference signal DMRS, control signaling DCI and Physical Downlink Shared Channel to UE
PDSCH data, the control signaling include rank number rank, antenna port port instruction；
Wherein, using single codeword or the corresponding port port of dicode word is indicated in the DCI of MU-MIMO, the port is 7-14, nothing
It need to notify scramble initial value nSCID；
DMRS transmission mode when using MU-MIMO, the not cocurrent flow of same UE, which is positive, hands over multiplex mode, using identical DMRS sequence
Column, and distinguished by different port；
It is non-orthogonal multiplexing mode between different UE, using different DMRS sequences, and according to Termination ID between DMRS sequence
It distinguishes.
7. MIMO downlink demodulation reference signal and signalling device according to claim 6, comprising:
Single codeword corresponds to port 7-10, maps since port7；
Dicode word corresponds to port 7-14, maps since port 7.
8. MIMO downlink demodulation reference signal and signalling device according to claim 6, comprising:
Single codeword corresponds to port 7-14, maps since port7 or port11.
9. MIMO downlink demodulation reference signal and signalling device according to claim 6, comprising:
Dicode word is mapped since port11, and port7 is jumped to after port14.
10. according to any MIMO downlink demodulation reference signal of claim 6 to 9 and signalling device, further includes:
UE reads DCI information for carrying out channel estimation according to DMRS, and according to channel estimation and DCI result to PDSCH into
Row demodulation receives.
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| JP6792705B2 (en) * | 2017-04-30 | 2020-11-25 | エルジー エレクトロニクス インコーポレイティド | DM-RS transmission / reception method and equipment for it in wireless communication systems |
| CN109150447B (en) * | 2017-06-16 | 2022-09-27 | 中兴通讯股份有限公司 | Information sending method, data demodulating method, information sending device, data demodulating device, communication node and network side equipment |
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