CN106712915A - Method and apparatus for sending demodulation reference signal, base station and terminal - Google Patents
Method and apparatus for sending demodulation reference signal, base station and terminal Download PDFInfo
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- CN106712915A CN106712915A CN201510784170.8A CN201510784170A CN106712915A CN 106712915 A CN106712915 A CN 106712915A CN 201510784170 A CN201510784170 A CN 201510784170A CN 106712915 A CN106712915 A CN 106712915A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Abstract
The embodiment of the invention provides a method and apparatus for sending a demodulation reference signal, a base station and a terminal. The method comprises the following steps: mapping DMRS sent by a demodulation reference signal DMRS port 7 and a DMRS port 8 to the terminal in a first mapping sequence to obtain a first DMRS; mapping the DMRS sent by a DMRS port 11 and a DMRS port 13 to the terminal in a second mapping sequence to obtain a second DMRS, wherein the first mapping sequence and the second mapping sequence are opposite; and sending the first DMRS and/or the second DMRS to the terminal. By adoption of the method provided by the embodiment of the invention, in the case of multiuser maximum 8-flow transmission, the power of an orthogonal frequency division multiplexing symbol is balanced while backward compatibility is guaranteed.
Description
Technical field
The present invention relates to wireless technical field, more particularly to a kind of method for sending demodulated reference signal, device,
Base station and terminal.
Background technology
Existing communication system, such as Long Term Evolution (LTE, Long Term Evolution), Worldwide Interoperability for Microwave are mutual
Couple into (WiMax, Worldwide Interoperability for Microwave Access), 802.11n,
What is used is all traditional 2D multiple-input and multiple-outputs (MIMO, Multiple-IZPut Multiple-Output)
Technology, its general principle is to improve transmission quality by the two-dimensional space free degree on horizontal plane, improve system
System capacity.With the development of Antenna Design framework, used to improve GSM efficiency of transmission and improving
Family is experienced, it is necessary to traditional 2D MIMO technologies, are expanded to 3D by the abundant excavation vertical space free degree
MIMO technology, makes full use of the free degree of three dimensions to improve systematic function.
The antenna frame of 2D MIMO is to use multiple array elements so as to obtain day higher by vertical dimensions
Line gain.And each bay in vertical dimensions uses fixed weights, to ensure to be obtained in vertical dimensions
To the beam patterns for needing.Therefore, 2D MIMO technologies have no idea to carry out the wave beam forming of vertical dimensions.
3D MIMO, can be by control in order to sufficiently use MIMO technology in the vertical dimension.
The weighted factor of vertical dimensions different antenna element forms different wave beams.Vertical dimensions ripple can effectively be distinguished
Beam, so as to provide the multiuser multiplexing of vertical dimensions, hoist capacity.Traditional LTE system supports maximum 8
Be extended for the port number of antenna by the design of antenna, 3D MIMO, supports such as 16,32,64,128
Deng the dimensional antenna form of port number.
Multi-user's multithread (MU-MIMO, Multi-User Multiple-Input in existing standard
The design of demodulated reference signal (DMRS) Multiple-Output) is as described below：
Existing standard third generation partner program (3GPP) version 12, does the support situation of user's multithread
For：The totally 4 stream orthogonal DMRS port (port) 7,8 of (layers), i.e., 2 are 2 just using length
Mask (OCC, orthogonal cover code) and two scramblers (Scrambling ID 0,1) are handed over to account for
With 12 Resource Units (RE).
Wherein, the principle of OCC is：Assuming that the channel on multiple row (symbol) is constant, by DMRS
Sequence is transmitted on multiple symbol simultaneously, obtains diversity gain.
For example：In the design of OCC=2, it is assumed that OFDM (OFDM, Orthogonal Frequency
Division Multiplexing) symbol#5 and #6 channel it is constant, by DMRS port7 utilize [+1+1]
Transmitted on symbol#5, #6, port8 utilizes [+1-1] to be transmitted on symbol#5, #6.So OCC
It is decoded as：The channel estimation of DMRS port7 is：s7 H(y5+y6)/2, wherein, s7Represent DMRS
Port7 signals, y5And y6The signal that symbol#5 and #6 is received is represented respectively.The letter of DMRS port8
Road is estimated as：s8 H(y5-y6)/2, wherein, s8Represent DMRS port8 signals.
For example：In the design of OCC=4, it is assumed that the channel of OFDM symbol#5, #6, #12 and #13
It is constant, utilize [+1+1+1+1] to be transmitted on symbol#5, #6, #12 and #13 DMRS port7,
Port8 utilizes [+1-1+1-1] to be transmitted on symbol#5, #6, #12 and #13, and port11 utilizes [+1+1
- 1-1] on symbol#5, #6, #12 and #13 transmit, port13 utilize [+1-1-1+1] symbol#5,
Transmitted on #6, #12 and #13.So OCC is decoded as：The channel estimation of DMRS port7 is：
s7 H(y5+y6+y12+y13)/2, wherein, s7Represent DMRS port7 signals, y5、y6、y12With
y13The signal that symbol#5, #6, #12 and #13 are received is represented respectively.
The occupation condition of DMRS is as shown in figure 1, wherein Fig. 1 when multi-user matches in existing standard
The lattice that the marks such as "/" are provided with middle OFDM symbol #5, #6, #12 and #13 represents it
The resource of occupancy, the resource impact of DMRS is as shown in table 1.
Table 1
The DMRS designs of maximum 8 stream of single user in existing standard use OCC=4, take 24RE,
Completely orthogonal 8 streaming is provided, its specific DMRS occupation condition is as shown in Fig. 2 wherein
The lattice table of the marks such as "/" is provided with Fig. 2 in OFDM symbol #5, #6, #12 and #13
Show its resource for taking.And under normal circulation lengthSequence as shown in table 2, whereinMark end
The sequence of mouthful p, p represents port, p=7,8,9,10,11,12,13,14,RepresentFirst
Code word,RepresentSecond code word,RepresentThe 3rd code word,
RepresentThe 4th code word.
Table 2
And one of combining standardized progress, DMRS configuration trend that standardization is discussed at present are：
The DMRS of the terminal (i.e. new terminal) after LTE versions 12 uses 12RE altogether, using length
The OCC spent for 4 provides 4 orthogonal DMRS port, outer scrambled code nSCID=0,1 and provides other 4
The quasi- orthogonal transmission of stream, supports the multi-user transmission of 8 streams altogether, its specific DMRS resource occupation feelings
Condition in OFDM symbol #5, #6, #12 and #13 in wherein Fig. 3 as shown in figure 3, be provided with "/"
Its resource for taking is represented etc. the lattice of mark.
The OCC designs of same position during single user 8 flows in existing standard are continued to use, to supporting that multi-user 8 flows
The DMRS designs of transmission are as shown in table 3.
Table 3
Wherein, OCC uses length for walsh yards of 4 as follows：
Also experience precoding in view of DMRS, it is assumed that above-mentioned walsh yards 4 row respectively with a, b, c,
D represents that 4 rows represent the code word of port7,8,11,13 respectively, then the DMRS on n-th antenna
It is expressed as：
Wherein wn,k(wherein k=1,2,3,4) is that the k on n-th antenna flows the corresponding code weight that prelists
Value, if wn,1=wn,2=wn,3=wn,4, then OFDM symbol #5 in transmission DMRS RE,
The power of #6, #12, #13 is expressed as follows：
When the stream of multi-user orthogonal 2 is using port7 and 8, the amplitude on 4 symbols is respectively 2,0,2,
0；When orthogonal 8 stream of single user, during using port7~14, the amplitude on 4 symbols is respectively 4,0,4,
0.As can be seen here, the unbalanced power between OFDM symbol, influences the power efficiency of transmitting terminal.
In existing protocol, in order to tackle unbalanced power problem, it is proposed that correspondingly solution：
4 code words order of OCC is allowed to be adjusted：The order of even number line is a, b, c, d, odd number
Capable order is d, c, b, a.Can so ensure in 2 granularities of Physical Resource Block (PRB),
4 OFDM symbol power-balances of transmission DMRS, its specific code assignment is as shown in figure 4, tool
The amplitude of body is as shown in Figure 5.
Now more antenna array subnumbers are introduced in view of 3D MIMO, and can provide vertically and horizontally two
The wave beam forming of individual dimension, can distinguish and more match user.But defined in existing standard
MU-MIMO only supports maximum 4 to flow, the DMRS designs of maximum 2 stream per user, it is impossible to meet 3D
The demand of more users pairing under MIMO.
When multi-user's 8 streaming of maximum, what is realized using 12RE, OCC=4 and 2 scrambler modes
In DMRS configurations, if directly using the OCC bitmap modes of existing standard definition, can there is OFDM symbols
The problem of unbalanced power between number.As shown in Fig. 6~Fig. 7, if continuing to use OCC bitmap modes first,
In 4 quadrature data streams of multi-user, the power of OFDM symbol 5 and 13 is more than OFDM symbol 6
Power with 12, wherein, 4 RE amplitudes of DMRS are respectively 4,0,0,0 and 0,0,0,
4。
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of method, device, base station for sending demodulated reference signal
And terminal, can be in the case of the streaming of multi-user 8, it is ensured that while backward compatibility, make orthogonal frequency division multiplexing
Balance is kept with the power of symbol.
In order to achieve the above object, The embodiment provides a kind of method for sending demodulated reference signal,
Base station is applied to, the method includes：
DMRS to being sent to terminal by demodulated reference signal DMRS port 7 and DMRS port 8
Mapping treatment is carried out using the first mapping order, a DMRS is obtained；
DMRS to being sent to terminal by DMRS port 11 and DMRS port 13 uses second
Mapping order carries out mapping treatment, obtains the 2nd DMRS；Wherein, the first mapping order and the second mapping are suitable
Sequence is opposite；
First DMRS and/or the 2nd DMRS are sent to terminal.
Wherein, in the DMRS to being sent to terminal by DMRS port 11 and DMRS port 13
Carry out mapping treatment using the second mapping order, the step of obtain two DMRS before, method also includes：
Obtaining to the DMRS that is sent to terminal by DMRS port 11 map the first for the treatment of just
Mask code sequence is handed over, the second mapping order is the code word mapping order of the first orthogonal mask sequence.
Wherein, obtaining the DMRS to being sent to terminal by DMRS port 11 carries out mapping treatment
The step of first orthogonal mask sequence, including：
By formula
The first orthogonal mask sequence is obtained, wherein, w11In the first orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numberings of the Physical Resource Block PRB in whole bandwidth.
Wherein, in the DMRS to being sent to terminal by DMRS port 11 and DMRS port 13
Carry out mapping treatment using the second mapping order, the step of obtain two DMRS before, method also includes：
Obtaining to the DMRS that is sent to terminal by DMRS port 13 map the second for the treatment of just
Mask code sequence is handed over, the second mapping order is the code word mapping order of the second orthogonal mask sequence.
Wherein, obtaining the DMRS to being sent to terminal by DMRS port 13 carries out mapping treatment
The step of second orthogonal mask sequence, including：
By formula
The second orthogonal mask sequence is obtained, wherein, w13In the second orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numberings of the Physical Resource Block PRB in whole bandwidth.
Embodiments of the invention additionally provide a kind of device for sending demodulated reference signal, are applied to base station, should
Device includes：
First mapping block, for by demodulated reference signal DMRS port 7 and DMRS port 8
The DMRS for being sent to terminal carries out mapping treatment using the first mapping order, obtains a DMRS；
Second mapping block, for being sent to end by DMRS port 11 and DMRS port 13
The DMRS at end carries out mapping treatment using the second mapping order, obtains the 2nd DMRS；Wherein, first
Mapping order and the second mapping order are opposite；
Sending module, for a DMRS and/or the 2nd DMRS to be sent into terminal.
Wherein, device also includes：
First acquisition module, is entered for obtaining to the DMRS that terminal is sent to by DMRS port 11
First orthogonal mask sequence of row mapping treatment, the second mapping order is that the code word of the first orthogonal mask sequence is reflected
Penetrate order.
Wherein, the first acquisition module includes：
First acquisition unit, for by formula
The first orthogonal mask sequence is obtained, wherein, w11In the first orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numberings of the Physical Resource Block PRB in whole bandwidth.
Wherein, device also includes：
Second acquisition module, is entered for obtaining to the DMRS that terminal is sent to by DMRS port 13
Second orthogonal mask sequence of row mapping treatment, the second mapping order is that the code word of the second orthogonal mask sequence is reflected
Penetrate order.
Wherein, the second acquisition module includes：
Second acquisition unit, for by formula
The second orthogonal mask sequence is obtained, wherein, w13In the second orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numberings of the Physical Resource Block PRB in whole bandwidth.
Embodiments of the invention additionally provide a kind of base station, including the above-mentioned device for sending demodulated reference signal.
Embodiments of the invention additionally provide a kind of method for sending demodulated reference signal, are applied to terminal, should
Method includes：
Receive base station and map treatment and by demodulated reference signal DMRS port 7 by the first mapping order
With DMRS port 8 send a DMRS, and/or base station by the second mapping order map treatment and
The 2nd DMRS sent by DMRS port 11 and DMRS port 13；Wherein, the first mapping
Order is opposite with the second mapping order；
Channel estimation is carried out according to a DMRS and/or the 2nd DMRS.
Embodiments of the invention additionally provide a kind of device for sending demodulated reference signal, are applied to terminal, should
Device includes：
Receiver module, treatment is mapped and by demodulated reference signal for receiving base station by the first mapping order
The DMRS that DMRS port 7 and DMRS port 8 send, and/or base station is by the second mapping
Sequential Mapping treatment and the 2nd DMRS sent by DMRS port 11 and DMRS port 13；
Wherein, the first mapping order and the second mapping order are opposite；
Estimation module, for carrying out channel estimation according to a DMRS and/or the 2nd DMRS.
Embodiments of the invention additionally provide a kind of terminal, including the above-mentioned device for sending demodulated reference signal.
Such scheme of the invention at least includes following beneficial effect：
In an embodiment of the present invention, by being sent by DMRS port 7 and DMRS port 8
DMRS to terminal carries out mapping treatment using the first mapping order, obtains a DMRS, and right
The DMRS for being sent to terminal by DMRS port 11 and DMRS port 13 is used and the first mapping
The second sequentially opposite mapping order carries out mapping treatment, obtains the 2nd DMRS, and by a DMRS
And/or the 2nd DMRS be sent to terminal, solve multi-user maximum 8 streaming in the case of, it is orthogonal
The problem of the unbalanced power of frequency division multiplexing symbol, has reached in the case of multi-user's 8 streaming of maximum,
While ensureing backward compatibility, the power of OFDM symbol is set to keep the effect for balancing.
Brief description of the drawings
Fig. 1 carries out DMRS when multi-user matches for 4 orthogonal mask to use length in existing standard
Resource occupation schematic diagram；
Fig. 2 is when using in existing standard the length to carry out 8 streaming of single user for 4 orthogonal mask
The resource occupation schematic diagram of DMRS；
Fig. 3 is when using in existing standard the length to carry out 8 streaming of multi-user for 4 orthogonal mask
The resource occupation schematic diagram of DMRS；
Fig. 4 is code word when using in existing standard the length to carry out 8 streaming of single user for 4 orthogonal mask
Distribution schematic diagram；
Fig. 5 is amplitude when using in existing standard the length to carry out 8 streaming of single user for 4 orthogonal mask
Schematic diagram；
Fig. 6 is code word when using in existing standard the length to carry out 4 streaming of multi-user for 4 orthogonal mask
Distribution schematic diagram；
Fig. 7 is amplitude when using in existing standard the length to carry out 4 streaming of multi-user for 4 orthogonal mask
Schematic diagram；
Fig. 8 is the flow chart of the method for transmission demodulated reference signal in first embodiment of the invention；
Fig. 9 is to be sent by DMRS port 7 and DMRS port 8 in first embodiment of the invention
Code assignment schematic diagram when DMRS uses the length to carry out 4 streaming of multi-user for 4 orthogonal mask；
Figure 10 is to be sent by DMRS port 11 and DMRS port 13 in first embodiment of the invention
Code assignment schematic diagrames of DMRS when using the length to carry out 4 streaming of multi-user for 4 orthogonal mask；
Figure 11 be first embodiment of the invention in use length to be spread for 4 orthogonal mask carries out multi-user 4
Amplitude schematic diagram when defeated；
Figure 12 is the structural representation of the device of transmission demodulated reference signal in second embodiment of the invention；
Figure 13 is the flow chart of the method for transmission demodulated reference signal in fourth embodiment of the invention；
Figure 14 is the structural representation of the device of transmission demodulated reference signal in fifth embodiment of the invention.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although being shown in accompanying drawing
The exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure without should be by
Embodiments set forth here is limited.Conversely, there is provided these embodiments are able to be best understood from this
It is open, and can by the scope of the present disclosure it is complete convey to those skilled in the art.
First embodiment
As shown in figure 8, the first embodiment of the present invention provides a kind of method for sending demodulated reference signal,
Base station is applied to, the method includes：
Step S801, to being sent to terminal by demodulated reference signal port 7 and DMRS port 8
DMRS carries out mapping treatment using the first mapping order, obtains a DMRS.
In the first embodiment of the present invention, to by demodulated reference signal (DMRS) port 7 and DMRS
Port 8 be sent to terminal DMRS carry out map treatment orthogonal mask sequence it is orthogonal with existing standard
Mask code sequence is identical.
Step S802, the DMRS to being sent to terminal by DMRS port 11 and DMRS port 13
Mapping treatment is carried out using the second mapping order, the 2nd DMRS is obtained.
Wherein, above-mentioned first mapping order and the second mapping order are opposite.
In the first embodiment of the present invention, above-mentioned steps S801 and step S802 do not have the sequencing can
Speech.
Step S803, terminal is sent to by a DMRS and/or the 2nd DMRS.
In the first embodiment of the present invention, it is right at this for more detailed elaboration above-mentioned steps S803
Terminal is explained.I.e., in the first embodiment of the present invention, by (including version before LTE versions 12
This is including 12) terminal be referred to as conventional terminal (UE), the later terminal of LTE versions 12 is referred to as new UE.
Correspondingly, under multi-user's 8 streaming scenes of maximum, when new UE and tradition UE is matched, base
Stand and send DMRS to tradition UE by DMRS port 7 and DMRS port 8, by DMRS
Port 11 and DMRS port 13 send DMRS to new UE.And to by the He of DMRS port 7
DMRS port 8 be sent to traditional UE DMRS carry out map treatment orthogonal mask sequence with it is existing
The orthogonal mask sequence of standard is identical, so just can make OFDM symbol while backward compatibility is ensured
Power keep balance.
And work as under multi-user's 8 streaming scenes of maximum, when only existing the pairing between new UE, just it is not required to
Distinguish the DMRS port for sending DMRS because new UE can receive and identify DMRS port 7,
The DMRS of DMRS port 8, DMRS port 11 and DMRS port 13.If additionally, many
Under user's 8 streaming scenes of maximum, when only existing the pairing between traditional UE, performed according to existing standard
, therefore will not be repeated here.
In the first embodiment of the present invention, by by DMRS port 7 and DMRS port 8
The DMRS for being sent to terminal carries out mapping treatment using the first mapping order, obtains a DMRS, with
And the DMRS to being sent to terminal by DMRS port 11 and DMRS port 13 is used and first
The second opposite mapping order of mapping order carries out mapping treatment, obtains the 2nd DMRS, and by first
DMRS and/or the 2nd DMRS are sent to terminal, solve in the case of multi-user's 8 streaming of maximum,
The problem of the unbalanced power of OFDM symbol, has reached the situation in multi-user's 8 streaming of maximum
Under, it is ensured that while backward compatibility, the power of OFDM symbol is kept the effect for balancing.
In the first embodiment of the present invention, before above-mentioned steps S802 is performed, the above method also includes：
Obtaining to the DMRS that is sent to terminal by DMRS port 11 map the first for the treatment of and orthogonal covers
Code sequence, and above-mentioned second mapping order is the code word mapping order of the first orthogonal mask sequence.Specifically,
Can be by formula
The first orthogonal mask sequence is obtained, wherein, w11In the first orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numbering of the Physical Resource Block (PRB) in whole bandwidth.
Herein in order to elaborate above-mentioned w11The effect of the expression formula of (i), it is assumed that to passing through in existing standard
The code word of the orthogonal mask sequence 1 that the DMRS that DMRS port11 are sent to terminal carries out mapping treatment is reflected
(order is above-mentioned first mapping order, and a, b, c, d are represented respectively for a, b, c, d to penetrate order
The code word of each column of orthogonal mask sequence 1, ), then by above-mentioned w11The calculating of (i) formula, the first orthogonal mask sequence for obtaining
Code word mapping order be d, c, b, a (this order be above-mentioned second mapping order).May be appreciated
It is, when the mapping order of the code word of the orthogonal mask sequence 1 in existing standard is d, c, b, a, to lead to
Cross above-mentioned w11The calculating of (i) formula, the mapping order of the code word of the first orthogonal mask sequence for obtaining is a,
b、c、d.That is, equivalent to by the orthogonal mask sequence of a, b, c, d and d, c, b, a in existing standard
The corresponding row of code word mapping order of row is exchanged.
Similarly, before above-mentioned steps S802 is performed, the above method also includes：Obtain to by DMRS
The DMRS that port 13 is sent to terminal map the second orthogonal mask sequence for the treatment of, and above-mentioned second
Mapping order is the code word mapping order of the second orthogonal mask sequence.Specifically, can be by formula
The second orthogonal mask sequence is obtained, wherein, w13In the second orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nRRBRepresent numbering of the Physical Resource Block (PRB) in whole bandwidth.
Herein in order to elaborate above-mentioned w13The effect of the expression formula of (i), it is assumed that to passing through in existing standard
The code word of the orthogonal mask sequence 2 that the DMRS that DMRS port13 are sent to terminal carries out mapping treatment is reflected
(order is above-mentioned first mapping order, and a, b, c, d are represented respectively for a, b, c, d to penetrate order
The code word of each column of orthogonal mask sequence 1, ), then by above-mentioned w13The calculating of (i) formula, the second orthogonal mask sequence for obtaining
Code word mapping order be d, c, b, a (this order be above-mentioned second mapping order).May be appreciated
It is, when the mapping order of the code word of the orthogonal mask sequence 2 in existing standard is d, c, b, a, to lead to
Cross above-mentioned w13The calculating of (i) formula, the mapping order of the code word of the second orthogonal mask sequence for obtaining is a,
b、c、d.That is, equivalent to by the orthogonal mask sequence of a, b, c, d and d, c, b, a in existing standard
The corresponding row of code word mapping order of row is exchanged.
It is similar with DMRS port11 and DMRS port13, to being sent to terminal by DMRS port 7
DMRS carry out map treatment orthogonal mask sequence 3 can be by formula
It is calculated, wherein, w7I () represents i-th code word in orthogonal mask sequence 3, i represents code
The sequence number of word, i=0,1,2,3,M ' tables
Show the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0 represents each physical resource
The 1st row subcarrier that DMRS takes in block, DMRS takes during m '=1 represents each Physical Resource Block
The 6th row subcarrier, m '=2 represent each Physical Resource Block in DMRS take the 11st row subcarrier,
nPRBRepresent numbering of the Physical Resource Block (PRB) in whole bandwidth.
Similarly, mapping the orthogonal for the treatment of is carried out to the DMRS for being sent to terminal by DMRS port 8 to cover
Code sequence 4 can be by formula
It is calculated, wherein, w8I () represents i-th code word in orthogonal mask sequence 4, i represents code
The sequence number of word, i=0,1,2,3,M ' tables
Show the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0 represents each physical resource
The 1st row subcarrier that DMRS takes in block, DMRS takes during m '=1 represents each Physical Resource Block
The 6th row subcarrier, m '=2 represent each Physical Resource Block in DMRS take the 11st row subcarrier,
nPRBRepresent numbering of the Physical Resource Block (PRB) in whole bandwidth.
It should be noted that the DMRS to being sent to terminal by DMRS port 7 carries out mapping treatment
Orthogonal mask sequence 3 and existing standard in DMRS that terminal is sent to by DMRS port 7 is entered
The orthogonal mask sequence of row mapping treatment is identical, and DMRS port 8 is sent to the DMRS of terminal and carries out
To being sent to terminal by DMRS port 8 in the orthogonal mask sequence 4 and existing standard of mapping treatment
The orthogonal mask sequence that DMRS map treatment is identical.Therefore, herein not to above-mentioned w7(i) and
w8I () carries out excessive explanation.
By above-mentioned w7(i)、w8(i)、w11(i) and w13I the formula of () understands, in the present invention
First embodiment in, the DMRS to being sent to terminal by DMRS port 7 and DMRS port 8
Carried out at mapping using the first mapping order (the first mapping order is identical with the mapping order in existing standard)
Reason, while the DMRS to being sent to terminal by DMRS port 11 and DMRS port 13 is used
Second mapping order opposite with the first mapping order carries out mapping treatment, so as to reach in multi-user 8
In the case of streaming, it is ensured that while backward compatibility, the power of OFDM symbol is set to keep balance
Effect.
In the first embodiment of the present invention, the above method is illustrated with an instantiation.Such as Fig. 9
It is shown, the DMRS of terminal is sent in n by DMRS port 7 and DMRS port 8PRB=1
Code word order in 1st row of PRB is d, c, b, a, code word in the 6th row order be a, b,
C, d, the code word order in the 11st row are d, c, b, a；And in nPRB1st row of=2 PRB
In code word order be a, b, c, d, code word in the 6th row order is d, c, b, a, the 11st
Code word order in row is a, b, c, d.Similarly, as shown in Figure 10, by DMRS port 11
The DMRS of terminal is sent in n with DMRS port 13PRBCode word in 1st row of=1 PRB
Order is a, b, c, d, and the code word order in the 6th row is d, c, b, a, the code in the 11st row
Word order is a, b, c, d；And in nPRBIn 1st row of=2 PRB code word order be a,
B, c, d, the code word order in the 6th row are d, c, b, a, code word in the 11st row order be a,
b、c、d.After so transmitting so that OFDM symbol #5, #6, the amplitude of #12, #13 such as Figure 11
It is shown.
Herein with nPRBAs a example by the code word of the 1st row of=1 PRB, knowable to Fig. 9~Figure 10,
nPRBIn 1st row of=1 PRB, the DMRS to being sent to terminal by DMRS port 7 is entered
The code word of orthogonal mask sequence 3 of row mapping treatment is：D=1, c=1, b=1, a=1, to by DMRS
The DMRS that port 8 is sent to terminal map the code word of orthogonal mask sequence 4 for the treatment of and is：D=-1,
C=1, b=-1, a=1, the DMRS to being sent to terminal by DMRS port 11 carry out mapping treatment
The code word of the first orthogonal mask sequence be：A=1, b=1, c=-1, d=-1, to by DMRS port
The code word of the second orthogonal mask sequence that 13 DMRS for being sent to terminal map treatment is：A=1,
B=-1, c=-1, d=1.It is so as shown in figure 11, in nPRBOFDM in 1st row of=1 PRB
The amplitude of symbol #5, #6, #12, #13 is respectively 2,2, -2,2.
Similarly, in nPRBIn 6th row of=1 PRB, to being sent to end by DMRS port 7
The code word of orthogonal mask sequence 3 that the DMRS at end map treatment is：A=1, b=1, c=1, d=1,
DMRS to being sent to terminal by DMRS port 8 map the orthogonal mask sequence 4 for the treatment of
Code word is：A=1, b=-1, c=1, d=-1, the DMRS to being sent to terminal by DMRS port 11
The code word of the first orthogonal mask sequence for map treatment is：D=-1, c=-1, b=1, a=1, to passing through
DMRS port 13 be sent to terminal DMRS carry out map treatment the second orthogonal mask sequence code
Word is：D=1, c=-1, b=-1, a=1.It is so as shown in figure 11, in nPRBThe 6th of=1 PRB
OFDM symbol #5, #6, the amplitude of #12, #13 are respectively 2, -2,2,2 in row.
Similarly, as shown in figure 11, in nPRBOFDM symbol #5 in 11st row of=1 PRB,
The amplitude of #6, #12, #13 is respectively 2,2, -2,2, in nPRBOFDM in 1st row of=2 PRB
The amplitude of symbol #5, #6, #12, #13 is respectively 2, -2,2,2, in nPRBThe 6th of=2 PRB
OFDM symbol #5, #6, the amplitude of #12, #13 are respectively 2,2, -2,2 in row, in nPRB=2
OFDM symbol #5, #6, the amplitude of #12, #13 are respectively 2, -2,2,2 in 11st row of PRB.
It follows that the power-balance of each OFDM symbol.
Second embodiment
As shown in figure 12, the second embodiment of the present invention provides a kind of device for sending demodulated reference signal,
Base station is applied to, the device includes：
First mapping block 1201, for by demodulated reference signal DMRS port 7 and DMRS ends
The DMRS that mouth 8 is sent to terminal carry out mapping treatment using the first mapping order, obtain a DMRS；
Second mapping block 1202, for being sent by DMRS port 11 and DMRS port 13
DMRS to terminal carries out mapping treatment using the second mapping order, obtains the 2nd DMRS；Wherein,
First mapping order and the second mapping order are opposite；
Sending module 1203, for a DMRS and/or the 2nd DMRS to be sent into terminal.
Wherein, device also includes：
First acquisition module, is entered for obtaining to the DMRS that terminal is sent to by DMRS port 11
First orthogonal mask sequence of row mapping treatment, the second mapping order is that the code word of the first orthogonal mask sequence is reflected
Penetrate order.
Wherein, the first acquisition module includes：
First acquisition unit, for by formula
The first orthogonal mask sequence is obtained, wherein, w11In the first orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numberings of the Physical Resource Block PRB in whole bandwidth.
Wherein, device also includes：
Second acquisition module, is entered for obtaining to the DMRS that terminal is sent to by DMRS port 13
Second orthogonal mask sequence of row mapping treatment, the second mapping order is that the code word of the second orthogonal mask sequence is reflected
Penetrate order.
Wherein, the second acquisition module includes：
Second acquisition unit, for by formula
The second orthogonal mask sequence is obtained, wherein, w13In the second orthogonal mask sequence of (i) expression i-th
Individual code word, i represents the sequence number of code word, i=0,1,2,3, M ' represents the line number of the subcarrier of DMRS occupancy in each Physical Resource Block, m '=0
The 1st row subcarrier of DMRS occupancy in each Physical Resource Block is represented, m '=1 represents each physics money
The 6th row subcarrier that DMRS takes in source block, DMRS is accounted for during m '=2 represent each Physical Resource Block
11st row subcarrier, nPRBRepresent numberings of the Physical Resource Block PRB in whole bandwidth.
In the second embodiment of the present invention, base station is by by DMRS port 7 and DMRS ends
The DMRS that mouth 8 is sent to terminal carry out mapping treatment using the first mapping order, obtain a DMRS,
And the DMRS to being sent to terminal by DMRS port 11 and DMRS port 13 is used and the
The second opposite mapping order of one mapping order carries out mapping treatment, obtains the 2nd DMRS, and by first
DMRS and/or the 2nd DMRS are sent to terminal, solve in the case of multi-user's 8 streaming of maximum,
The problem of the unbalanced power of OFDM symbol, has reached the situation in multi-user's 8 streaming of maximum
Under, it is ensured that while backward compatibility, the power of OFDM symbol is kept the effect for balancing.
It should be noted that the device of the transmission demodulated reference signal of second embodiment of the invention offer is application
The device of the method for the above-mentioned transmission demodulated reference signal for being applied to base station, i.e., the above-mentioned transmission for being applied to base station
All embodiments of the method for demodulated reference signal are applied to the device, and can reach same or analogous
Beneficial effect.
3rd embodiment
The third embodiment of the present invention provides a kind of base station, including the above-mentioned dress for sending demodulated reference signal
Put.
It should be noted that the base station that third embodiment of the invention is provided is to include the above-mentioned hair for being applied to base station
Send the base station of the device of demodulated reference signal, i.e., the device of the above-mentioned transmission demodulated reference signal for being applied to base station
All embodiments be applied to the base station, and can reach same or analogous beneficial effect.
Fourth embodiment
As shown in figure 13, the fourth embodiment of the present invention provides a kind of method for sending demodulated reference signal,
Terminal is applied to, wherein, the method includes：
Step S1301, receives base station and maps treatment and by demodulated reference signal by the first mapping order
The DMRS that DMRS port 7 and DMRS port 8 send, and/or base station is by the second mapping
Sequential Mapping treatment and the 2nd DMRS sent by DMRS port 11 and DMRS port 13.
Wherein, in the fourth embodiment of the present invention, above-mentioned first mapping order and the second mapping order are opposite.
In the fourth embodiment of the present invention, it is right at this for more detailed elaboration above-mentioned steps S1301
Terminal is explained.I.e., in the fourth embodiment of the present invention, by (including version before LTE versions 12
This is including 12) terminal be referred to as traditional UE, the later terminal of LTE versions 12 is referred to as new UE.So
Under multi-user's 8 streaming scenes of maximum, when new UE and tradition UE is matched, what new UE was received is
By DMRS port 11 and the DMRS of the transmission of DMRS port 13, what traditional UE was received is for base station
The DMRS that base station is sent by DMRS port 7 and DMRS port 8.
And work as under multi-user's 8 streaming scenes of maximum, when only existing the pairing between new UE, just it is not required to
DMRS port is distinguished, because new UE can receive and identify DMRS port 7, DMRS port
8th, the DMRS of DMRS port 11 and DMRS port 13.If additionally, being flowed in multi-user maximum 8
Under transmitting scene, when only existing the pairing between traditional UE, performed according to existing standard, therefore
This is repeated no more.
Step S1302, channel estimation is carried out according to a DMRS and/or the 2nd DMRS.
In the fourth embodiment of the present invention, the meaning of step S1302 expression is：Terminal (new UE or biography
System UE) after DMRS (i.e. a DMRS and/or the 2nd DMRS) is received, can be according to reception
To DMRS carry out channel estimation.
In the fourth embodiment of the present invention, under multi-user's 8 streaming scenes of maximum, when new UE and biography
When system UE is matched, new UE receives what base station was sent by DMRS port 11 and DMRS port 13
DMRS, traditional UE receive the DMRS that base station is sent by DMRS port 7 and DMRS port 8,
So as to reach in the case of multi-user's 8 streaming of maximum, it is ensured that while backward compatibility, make orthogonal frequency
The power of multiplexed symbols is divided to keep the effect for balancing.
5th embodiment
As shown in figure 14, the fifth embodiment of the present invention provides a kind of device for sending demodulated reference signal,
Terminal is applied to, the device includes：
Receiver module 1401, maps treatment and is joined by demodulating for receiving base station by the first mapping order
Examine the DMRS that signal DMRS port 7 and DMRS port 8 send, and/or base station is by the
Two mapping orders map treatment and sent by DMRS port 11 and DMRS port 13 second
DMRS；Wherein, the first mapping order and the second mapping order are opposite；
Estimation module 1402, for carrying out channel estimation according to a DMRS and/or the 2nd DMRS.
In the fifth embodiment of the present invention, under multi-user's 8 streaming scenes of maximum, when new UE and biography
When system UE is matched, new UE receives what base station was sent by DMRS port 11 and DMRS port 13
DMRS, traditional UE receive the DMRS that base station is sent by DMRS port 7 and DMRS port 8,
So as to reach in the case of multi-user's 8 streaming of maximum, it is ensured that while backward compatibility, make orthogonal frequency
The power of multiplexed symbols is divided to keep the effect for balancing.
It should be noted that the device of the transmission demodulated reference signal of fifth embodiment of the invention offer is application
The device of the method for the above-mentioned transmission demodulated reference signal for being applied to terminal, i.e., the above-mentioned transmission for being applied to terminal
All embodiments of the method for demodulated reference signal are applied to the device, and can reach same or analogous
Beneficial effect.
Sixth embodiment
The sixth embodiment of the present invention provides a kind of terminal, including the above-mentioned dress for sending demodulated reference signal
Put.
It should be noted that the terminal that sixth embodiment of the invention is provided includes the above-mentioned transmission for being applied to terminal
The terminal of the device of demodulated reference signal, i.e., the device of the above-mentioned transmission demodulated reference signal for being applied to terminal
All embodiments are applied to the terminal, and can reach same or analogous beneficial effect.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (14)
1. a kind of method for sending demodulated reference signal, is applied to base station, it is characterised in that methods described
Including：
DMRS to being sent to terminal by demodulated reference signal DMRS port 7 and DMRS port 8
Mapping treatment is carried out using the first mapping order, a DMRS is obtained；
DMRS to being sent to terminal by DMRS port 11 and DMRS port 13 uses second
Mapping order carries out mapping treatment, obtains the 2nd DMRS；Wherein, first mapping order and described
Two mapping orders are opposite；
First DMRS and/or the 2nd DMRS are sent to the terminal.
2. method according to claim 1, it is characterised in that pass through DMRS port at described pair
11 and DMRS port 13 be sent to the DMRS of terminal and carry out mapping treatment using the second mapping order,
Before the step of obtaining two DMRS, methods described also includes：
Obtaining to the DMRS that is sent to terminal by DMRS port 11 map the first for the treatment of just
Mask code sequence is handed over, second mapping order is the code word mapping order of the first orthogonal mask sequence.
3. method according to claim 2, it is characterised in that the acquisition is to by DMRS ends
The DMRS that mouth 11 is sent to terminal carry out the step of mapping the first orthogonal mask sequence for the treatment of, including：
By formula
The first orthogonal mask sequence is obtained, wherein, the w11I () represents first orthogonal mask
I-th code word in sequence, i represents the sequence number of code word, i=0,1,2,3, M ' represents the subcarrier of DMRS occupancy in each Physical Resource Block
Line number, m '=0 represent each Physical Resource Block in DMRS take the 1st row subcarrier, m '=1 table
Show the 6th row subcarrier of DMRS occupancy in each Physical Resource Block, m '=2 represent each physical resource
The 11st row subcarrier that DMRS takes in block, nPRBRepresent Physical Resource Block PRB in whole bandwidth
Numbering.
4. method according to claim 1, it is characterised in that pass through DMRS port at described pair
11 and DMRS port 13 be sent to the DMRS of terminal and carry out mapping treatment using the second mapping order,
Before the step of obtaining two DMRS, methods described also includes：
Obtaining to the DMRS that is sent to terminal by DMRS port 13 map the second for the treatment of just
Mask code sequence is handed over, second mapping order is the code word mapping order of the second orthogonal mask sequence.
5. method according to claim 4, it is characterised in that the acquisition is to by DMRS ends
The DMRS that mouth 13 is sent to terminal carry out the step of mapping the second orthogonal mask sequence for the treatment of, including：
By formula
The second orthogonal mask sequence is obtained, wherein, the w13I () represents second orthogonal mask
I-th code word in sequence, i represents the sequence number of code word, M ' represents the subcarrier of DMRS occupancy in each Physical Resource Block
Line number, m '=0 represent each Physical Resource Block in DMRS take the 1st row subcarrier, m '=1 table
Show the 6th row subcarrier of DMRS occupancy in each Physical Resource Block, m '=2 represent each physical resource
The 11st row subcarrier that DMRS takes in block, nPRBRepresent Physical Resource Block PRB in whole bandwidth
Numbering.
6. a kind of device for sending demodulated reference signal, is applied to base station, it is characterised in that described device
Including：
First mapping block, for by demodulated reference signal DMRS port 7 and DMRS port 8
The DMRS for being sent to terminal carries out mapping treatment using the first mapping order, obtains a DMRS；
Second mapping block, for being sent to end by DMRS port 11 and DMRS port 13
The DMRS at end carries out mapping treatment using the second mapping order, obtains the 2nd DMRS；Wherein, it is described
First mapping order and second mapping order are opposite；
Sending module, for a DMRS and/or the 2nd DMRS to be sent into the terminal.
7. device according to claim 6, it is characterised in that described device also includes：
First acquisition module, is entered for obtaining to the DMRS that terminal is sent to by DMRS port 11
First orthogonal mask sequence of row mapping treatment, second mapping order is the first orthogonal mask sequence
Code word mapping order.
8. device according to claim 7, it is characterised in that first acquisition module includes：
First acquisition unit, for by formula
The first orthogonal mask sequence is obtained, wherein, the w11I () represents first orthogonal mask
I-th code word in sequence, i represents the sequence number of code word, i=0,1,2,3, M ' represents the subcarrier of DMRS occupancy in each Physical Resource Block
Line number, m '=0 represent each Physical Resource Block in DMRS take the 1st row subcarrier, m '=1 table
Show the 6th row subcarrier of DMRS occupancy in each Physical Resource Block, m '=2 represent each physical resource
The 11st row subcarrier that DMRS takes in block, nPRBRepresent Physical Resource Block PRB in whole bandwidth
Numbering.
9. device according to claim 6, it is characterised in that described device also includes：
Second acquisition module, is entered for obtaining to the DMRS that terminal is sent to by DMRS port 13
Second orthogonal mask sequence of row mapping treatment, second mapping order is the second orthogonal mask sequence
Code word mapping order.
10. device according to claim 9, it is characterised in that second acquisition module includes：
Second acquisition unit, for by formula
The second orthogonal mask sequence is obtained, wherein, the w13I () represents second orthogonal mask
I-th code word in sequence, i represents the sequence number of code word, i=0,1,2,3, M ' represents the subcarrier of DMRS occupancy in each Physical Resource Block
Line number, m '=0 represent each Physical Resource Block in DMRS take the 1st row subcarrier, m '=1 table
Show the 6th row subcarrier of DMRS occupancy in each Physical Resource Block, m '=2 represent each physical resource
The 11st row subcarrier that DMRS takes in block, nPRBRepresent Physical Resource Block PRB in whole bandwidth
Numbering.
11. a kind of base stations, it is characterised in that including the transmission solution as described in any one of claim 6~10
Adjust the device of reference signal.
A kind of 12. methods for sending demodulated reference signal, are applied to terminal, it is characterised in that methods described
Including：
Receive base station and map treatment and by demodulated reference signal DMRS port 7 by the first mapping order
With DMRS port 8 send a DMRS, and/or base station by the second mapping order map treatment and
The 2nd DMRS sent by DMRS port 11 and DMRS port 13；Wherein, described first
Mapping order and second mapping order are opposite；
Channel estimation is carried out according to a DMRS and/or the 2nd DMRS.
A kind of 13. devices for sending demodulated reference signal, are applied to terminal, it is characterised in that described device
Including：
Receiver module, treatment is mapped and by demodulated reference signal for receiving base station by the first mapping order
The DMRS that DMRS port 7 and DMRS port 8 send, and/or base station is by the second mapping
Sequential Mapping treatment and the 2nd DMRS sent by DMRS port 11 and DMRS port 13；
Wherein, first mapping order and second mapping order are opposite；
Estimation module, for carrying out channel estimation according to a DMRS and/or the 2nd DMRS.
14. a kind of terminals, it is characterised in that send demodulation reference letter including as claimed in claim 13
Number device.
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