CN103973392B - Parameter sending method and device, uplink demodulation reference signal launching technique and device - Google Patents
Parameter sending method and device, uplink demodulation reference signal launching technique and device Download PDFInfo
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- CN103973392B CN103973392B CN201310027363.XA CN201310027363A CN103973392B CN 103973392 B CN103973392 B CN 103973392B CN 201310027363 A CN201310027363 A CN 201310027363A CN 103973392 B CN103973392 B CN 103973392B
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Abstract
The invention discloses a kind of parameter sending method and device, method includes: that network side is that user side distribute parameter for generating demodulated reference signal DMRS sequence, comprising: system bandwidth, resource block index, cyclic shift indexes and DMRS motif column index；The parameter of generation is sent to user side by network side.The invention also discloses a kind of uplink demodulation reference signal launching technique and devices, method includes: that user side receives the parameter for being used to generate DMRS sequence that network side is sent, comprising: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；Parameter determines corresponding DMRS sequence to user side based on the received, and emits the DMRS sequence on corresponding physical resource.The present invention supports that more than two portions of bandwidth overlapping user DMRS's is orthogonal, is not limited by user moving speed using with performance.
Description
Technical field
The present invention relates to the signal transmission technology of wireless communication field more particularly to a kind of parameter sending method and device,
Uplink demodulation reference signal (DMRS, Demodulation Reference Signal) launching technique and device.
Background technique
Long term evolution (LTE, Long Term Evolution) project is 3rd generation mobile communication technology (3G, Third
Generation evolution), it is one between 3G and fourth generation mobile communication technology (4G, Fourth Generation)
Transition, it improves and enhances the aerial access technology of 3G, using orthogonal frequency division multiplexing (OFDM, Orthogonal
Frequency Division Multiplexing) technology and multiple-input and multiple-output (MIMO, Multiple Inputs and
Multiple Outputs) sole criterion of the technology (i.e. multi-antenna technology) as wireless network evolution.Advanced long term evolution
(LTE-A, LTE-Advanced) is the subsequent evolution of LTE technology.In order to meet the various demand parameters of 4G, for LTE-A's
Several key technologies are suggested, including carrier wave polymerization, cooperative multi-point send and receive, relay transmission and multiple antennas enhance etc..
Wherein, similar with downlink (DL, Downlink), the multiple antennas enhancing of uplink (UL, Uplink) equally includes being applied alone
(SU, Single User) multiple antennas enhancing in family enhances with multi-user's (MU, Multiple User) multiple antennas.
In LTE/LTE-A system, uplink DMRS sequence is used for Physical Uplink Shared Channel (PUSCH, Physical
Uplink Shared Channel) channel estimation, DMRS sequence is located at the 4th OFDM symbol of each time slot, and DMRS sequence is long
Degree is equal to the PUSCH transmission bandwidth as unit of sub-carrier number, i.e. LTE/LTE-A supports to generate corresponding different bandwidth size not
With the DMRS sequence of length.Since resource allocation is with 12 subcarriers, i.e. 1 resource block (RB, Resource Block) is
Partition size, therefore sequence length is only 12 multiple.For being more than 24 sequence length, corresponding DMRS basic sequence is determined
It is M that justice, which is length,ZCZadoff-Chu sequence cyclic extensions, wherein MZCFor most less than or equal to DMRS sequence length
Big prime.For being equal to 12 or 24 sequence length, corresponding DMRS basic sequence is defined as special passing through computer search
Four phase shift keying (QPSK, Quadrature Phase Shift Keying) sequence of acquisition.Every kind of DMRS sequence length pair
30 basic sequence groups are answered, each basic sequence group includes one or two basic sequence.One time slot actual use DMRS sequence be
The cyclic shift (linear phase shift on corresponding frequency domain) of a DMRS basic sequence in one DMRS basic sequence group of corresponding length,
Each DMRS basic sequence can at most define 12 kinds of cyclic shifts.Derived from identical DMRS basic sequence but with different cyclic shifts
The cross correlation of DMRS sequence is zero (orthogonal)；Derived from the cross correlation non-zero (nonopiate) of the DMRS sequence of different basic sequences.
According to the bandwidth allocation type of users multiplexing, uplink MU-MIMO transmission is divided into two kinds, i.e., bandwidth is completely overlapped
Uplink MU-MIMO transmission (the different user bandwidth of multiplexing is completely overlapped) and the uplink MU-MIMO transmission of portions of bandwidth overlapping are (multiple
Different user portions of bandwidth overlapping).Wherein, for two kinds of above-mentioned uplink MU-MIMO transmission types, the different of multiplexing are used
Family is preferred in the uplink DMRS sequence of bandwidth overlay part transmitting (completely overlapped Chong Die with portions of bandwidth including above-mentioned bandwidth)
It should be mutually orthogonal.In LTE/LTE-A system, the uplink MU-MIMO transmission completely overlapped for bandwidth, extremely such as Fig. 1
Shown in Fig. 3；Wherein, Fig. 1 be in the prior art by using derived from identical DMRS basic sequence different cyclic shifts (CS,
Cyclic Shift) sequence, realize the mutually orthogonal schematic diagram of the different DMRS of the completely overlapped different users multiplexings of bandwidth, figure
2 be to realize that bandwidth is completely overlapped by using orthogonal covering codes (OCC, Orthogonal Cover Code) in the prior art
The different DMRS of different users multiplexings mutually orthogonal schematic diagram, Fig. 3 are in the prior art by using derived from identical DMRS base
The different CS sequences and OCC of sequence realize the mutually orthogonal signal of the different DMRS of the completely overlapped different users multiplexings of bandwidth
Figure.For the uplink MU-MIMO transmission of portions of bandwidth overlapping, as shown in figure 4, the different DMRS from different users multiplexings can only
It is realized by using OCC mutually orthogonal.
With the continuous evolution of mobile communications network, the type of business that mobile subscriber supports will be more and more abundant.Due to not
Data volume with type of service transmission is typically different, therefore, under identical transmission conditions, the transmission of different service types needs
Bandwidth is generally also different.If scheduler is forced to different types of service and distributes identical transmission bandwidth, it will cause
The loss of undesirable spectrum efficiency.For hot spot covering scene, uplink MU-MIMO have become promoted network capacity must
Want means.In view of factors above, the uplink MU-MIMO transmission type of portions of bandwidth overlapping will become subsequent LTE/TE-A evolution
The important and universal transmission mode of network.But the difference of portions of bandwidth overlapping is realized by using OCC in the prior art
The different DMRS of users multiplexing mutually orthogonal method, has the following deficiencies:
1, the maximum users multiplexing number supported is two, and which has limited the further promotions of network capacity；
2, only when the coherence time of channel being greater than the time domain span of a subframe (including two time slots), this method is
It can be used, that is to say, that it is applied or limited performance is in user moving speed.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of parameter sending methods and device, uplink demodulation reference
Signal transmitting method and device, to support that more than two portions of bandwidth overlapping user DMRS's is mutually orthogonal, using with performance not
It is limited by user moving speed.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The present invention provides a kind of parameter sending methods, this method comprises:
Network side is that user side distributes the parameter for generating demodulated reference signal DMRS sequence, and the parameter includes: to be
Regiment commander is wide, resource block index, cyclic shift indexes and DMRS motif column index；
The parameter of generation is sent to the user side by the network side.
The network side is user side distributing cyclic shift index, comprising:
Partition loops are indexed according to all user resources blocks and shift user's cluster, and the cyclic shift user cluster is the money of set
The minimum user Chong Die with the resource block index outside set does not gather source block index；
The cyclic shift index is distributed for the user in each cyclic shift user cluster.
User's distributing cyclic shift index in each cyclic shift user cluster, comprising:
According to the resource block index and pre-defined rule distributed for user, the user reflecting to system transport layer is executed
It penetrates；The pre-defined rule includes at least: a user can only be mapped to a system transport layer, if current system transport layer is surplus
Remaining resource block index is indexed comprising the resource block of active user, then allows active user to be mapped to current system transport layer, otherwise
Do not allow to be mapped to current system transport layer；
According to the user to the mapping of system transport layer, indexed for user's distributing cyclic shift.
It is described according to user to the mapping of system transport layer, indexed for user's distributing cyclic shift, comprising:
Obtain the system transmission number of plies U that previous cycle displacement user's cluster includes；
Selection meets the maximum U of minimum value of cyclic shift interval from all cyclic shifts index that current system is supported
A cyclic shift index；
By the corresponding U system transmission distributed to previous cycle displacement user's cluster and include of the U cyclic shift index of selection
Layer；
User's cyclic shift index is equal to the cyclic shift index for the system transport layer that the user is mapped to.
The corresponding U system distributed to previous cycle displacement user's cluster and include of the U cyclic shift index by selection
Transport layer, comprising:
Any one in U cyclic shift index is distributed into the transmission of the system with optimal resource utilization
Layer；
Designated cycle displacement index in remaining U-1 cyclic shift index is distributed to suboptimum resource utilization
System transport layer, wherein the circulation that the designated cycle displacement index meets between the 1st cyclic shift of distribution index is moved
Bit interval is maximum；
Designated cycle displacement index in remaining U-2 cyclic shift index, which is distributed to, has time suboptimum resource utilization
System transport layer, wherein designated cycle displacement index meet and distribution the first two cyclic shift index between
Minimal circulation shift intervals are maximum；
And so on, until U cyclic shift index is all assigned to corresponding system transport layer.
This method further comprises:
The network side is that the user in same cyclic shift user cluster distributes identical DMRS motif column index.
The present invention also provides a kind of uplink demodulation reference signal launching techniques, this method comprises:
User side receives the parameter for being used to generate demodulated reference signal DMRS sequence that network side is sent, the parameter packet
It includes: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Parameter determines corresponding DMRS sequence to the user side based on the received, and emits institute on corresponding physical resource
State DMRS sequence.
Parameter determines corresponding DMRS sequence to the user side based on the received, comprising:
According to the system bandwidth and DMRS motif column index, the DMRS basic sequence of system bandwidth length is obtained；
It is indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generates system bandwidth length
Interim DMRS sequence；
The interim DMRS sequence is intercepted according to resource block index, and using obtained corresponding truncation sequence as final
DMRS sequence.
It is described to be indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generate system band
The interim DMRS sequence of wide length, comprising:
Circulative shift operation is carried out according to DMRS basic sequence of the cyclic shift index to the system bandwidth length, and
Using the cyclically shifted sequences of output as the interim DMRS sequence of user.
The length of interception is equal to the sum that the resource block indexes corresponding subcarrier, and the position of interception is the resource block
Index the position of corresponding subcarrier.
The present invention also provides a kind of parameter sending devices, comprising:
Parametric distribution module, it is described for distributing the parameter for generating demodulated reference signal DMRS sequence for user side
Parameter includes: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Parameter sending module, for the parameter generated to be sent to the user side.
The parametric distribution module is further used for, and indexes partition loops according to all user resources blocks and shifts user's cluster,
The cyclic shift user cluster is that the resource block of set indexes the not minimum user Chong Die with the resource block index outside set set；
The cyclic shift index is distributed for the user in each cyclic shift user cluster.
User's distributing cyclic shift index in each cyclic shift user cluster, comprising:
According to the resource block index and pre-defined rule distributed for user, the user reflecting to system transport layer is executed
It penetrates；The pre-defined rule includes at least: a user can only be mapped to a system transport layer, if current system transport layer is surplus
Remaining resource block index is indexed comprising the resource block of active user, then allows active user to be mapped to current system transport layer, otherwise
Do not allow to be mapped to current system transport layer；
According to the user to the mapping of system transport layer, indexed for user's distributing cyclic shift.
It is described according to user to the mapping of system transport layer, indexed for user's distributing cyclic shift, comprising:
Obtain the system transmission number of plies U that previous cycle displacement user's cluster includes；
Selection meets the maximum U of minimum value of cyclic shift interval from all cyclic shifts index that current system is supported
A cyclic shift index；
By the corresponding U system transmission distributed to previous cycle displacement user's cluster and include of the U cyclic shift index of selection
Layer；
User's cyclic shift index is equal to the cyclic shift index for the system transport layer that the user is mapped to.
The corresponding U system distributed to previous cycle displacement user's cluster and include of the U cyclic shift index by selection
Transport layer, comprising:
Any one in U cyclic shift index is distributed into the transmission of the system with optimal resource utilization
Layer；
Designated cycle displacement index in remaining U-1 cyclic shift index is distributed to suboptimum resource utilization
System transport layer, wherein the circulation that the designated cycle displacement index meets between the 1st cyclic shift of distribution index is moved
Bit interval is maximum；
Designated cycle displacement index in remaining U-2 cyclic shift index, which is distributed to, has time suboptimum resource utilization
System transport layer, wherein designated cycle displacement index meet and distribution the first two cyclic shift index between
Minimal circulation shift intervals are maximum；
And so on, until U cyclic shift index is all assigned to corresponding system transport layer.
The parametric distribution module is further used for, and is that the user in same cyclic shift user cluster distributes identical DMRS
Motif column index.
The present invention also provides a kind of uplink demodulation reference signal emitter, which includes:
Parameter receiving module, for receiving the parameter for being used to generate demodulated reference signal DMRS sequence of network side transmission,
The parameter includes: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Signal emission module determines corresponding DMRS sequence for parameter based on the received, and in corresponding physical resource
The upper transmitting DMRS sequence.
Parameter determines corresponding DMRS sequence to the user side based on the received, comprising:
According to the system bandwidth and DMRS motif column index, the DMRS basic sequence of system bandwidth length is obtained；
It is indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generates system bandwidth length
Interim DMRS sequence；
The interim DMRS sequence is intercepted according to resource block index, and using obtained corresponding truncation sequence as final
DMRS sequence.
It is described to be indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generate system band
The interim DMRS sequence of wide length, comprising:
Circulative shift operation is carried out according to DMRS basic sequence of the cyclic shift index to the system bandwidth length, and
Using the cyclically shifted sequences of output as the interim DMRS sequence of user.
The length of the interception is equal to the sum that the resource block indexes corresponding subcarrier, and the position of interception is the money
Source block indexes the position of corresponding subcarrier.
A kind of parameter sending method provided by the present invention and device, uplink demodulation reference signal launching technique and device,
By configuring the user in same cyclic shift user cluster using identical system bandwidth length DMRS basic sequence, and by system
Final DMRS sequence of the truncation sequence of the cyclically shifted sequences of bandwidth length DMRS basic sequence as user, can support two
Band above partly overlaps the mutually orthogonal of user DMRS, and its application or performance are no longer limited by user moving speed or how general
Frequency displacement is strangled, while without the loss of user's spectrum efficiency；In addition, by maximizing the minimum between spatial reuse user DMRS sequence
Cyclic shift interval, the present invention can also preferably support different multidiameter scenes.In turn, network can further be promoted
Channel estimation quality in the case of user capacity and spatial reuse.
Detailed description of the invention
Fig. 1 is to realize that bandwidth is completely heavy by using the different CS sequences for being derived from identical DMRS basic sequence in the prior art
The different DMRS of folded different users multiplexings mutually orthogonal schematic diagram；
Fig. 2 is to realize the different DMRS phases of the completely overlapped different users multiplexings of bandwidth by using OCC in the prior art
Mutually orthogonal schematic diagram；
Fig. 3 is to realize that bandwidth is complete by using the different CS sequences and OCC for being derived from identical DMRS basic sequence in the prior art
The different DMRS of the folded different users multiplexings of full weight mutually orthogonal schematic diagram；
Fig. 4 is to realize the different DMRS phases of the different users multiplexings of portions of bandwidth overlapping by using OCC in the prior art
Mutually orthogonal schematic diagram；
Fig. 5 is a kind of flow diagram of parameter sending method of the embodiment of the present invention；
Fig. 6 is the schematic diagram that a kind of cyclic shift user cluster divides example；
Fig. 7 is a kind of example schematic that the user of cyclic shift user cluster maps to system transport layer；
Fig. 8 is a kind of flow diagram of uplink demodulation reference signal launching technique of the embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of parameter sending device of the embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram of uplink demodulation reference signal emitter of the embodiment of the present invention；
Figure 11 is the schematic diagram of the example one of uplink DMRS transmitting；
Figure 12 is the schematic diagram of the example two of uplink DMRS transmitting.
Specific embodiment
The technical solution of the present invention is further elaborated in the following with reference to the drawings and specific embodiments.
A kind of parameter sending method provided in an embodiment of the present invention, as shown in figure 5, specifically including that
Step 501, network side is that user side distributes the parameter for generating DMRS sequence, and the parameter includes: system band
Wide, resource block index, cyclic shift index and DMRS motif column index.
Step 502, the parameter of generation is sent to the user side by network side.
Network side is primarily referred to as base station in the embodiment of the present invention, and user side is primarily referred to as user terminal (UE).
Wherein, the network side is user side distributing cyclic shift index, comprising:
A, partition loops are indexed according to all user resources blocks and shifts user's cluster, the cyclic shift user cluster refers to set
Resource block index not the minimum user Chong Die with the resource block index outside set set；Wherein, minimum user's set refers to this
The resource block index for gathering any subset Chong Die with user resources block indexes other outside subset (must be overlapped including completely and part
Overlapping), the resource block index of set is the union of all user resources block indexes in set.As shown in fig. 6, Fig. 6 follows for one kind
Ring shifts user's cluster and divides example, wherein system bandwidth resource block index is RBIBW, cyclic shift user cluster 1 and user's cluster 2
Resource block index is respectively RBICSUC1With RBICSUC2, two cyclic shift user's clusters are co-existed in system bandwidth scope, that is, are recycled
User's cluster 1 and user's cluster 2 are shifted, each cyclic shift user cluster is the user's set for including one or more users, and two are followed
The resource block index of ring displacement user's cluster is not overlapped.
B, the cyclic shift index is distributed for the user in each cyclic shift user cluster.
It specifically includes:
A, according to the resource block index and pre-defined rule for being user's distribution, the mapping of user to system transport layer is executed；
The pre-defined rule includes at least: a user can only be mapped to a system transport layer；For particular user, such as
Fruit current system transport layer surplus resources block index (indexing without the resource block of corresponding any user) includes active user's
Resource block index, then active user can be mapped to current system transport layer, and otherwise, active user can not be mapped to current system
System transport layer.
As shown in fig. 7, Fig. 7 shows the specific example that the user of cyclic shift user's cluster maps to system transport layer,
In, previous cycle displacement user's cluster includes user 1 to user 10, and cyclic shift user's cluster resource block index is RBICSUC, user 1
Resource block index to user 10 is respectively RBIU1To RBIU10.It should be noted that in systems in practice, not all resource
Block can be used as space division multiplexing (MU) resource, even if most of resource block is used as space division multiplexing resource, portions of bandwidth overlapping
Space division multiplexing type will not be universal as shown in fig. 7, therefore, Fig. 7 has been merely given as a kind of portions of bandwidth overlapping space division
The extreme case of multiplexing, with illustrate user to system transport layer mapping mode.Finally, user 1, user 2 and user 3 are mapped to
System transport layer 1, user 4, user 5 and user 6 are mapped to system transport layer 2, and user 7, user 8 and user 9 are mapped to system
Grade transmitting layer 3, user 10 are mapped to transport layer 4.In addition again as shown in fig. 6, the system that two cyclic shift user's clusters are related to passes
The defeated number of plies is respectively X and Y, i.e. two cyclic shift user clusters can be related to the different system transmission numbers of plies.
B, it according to the user to the mapping of system transport layer, is indexed for user's distributing cyclic shift.
It specifically includes:
Step 1: obtaining the system transmission number of plies U that previous cycle displacement user's cluster includes.
Referring to Fig. 7, the system transmission number of plies U in Fig. 7 is 4 layers.
It is followed Step 2: all cyclic shifts index (number is V, and V > U) the middle selection supported from current system meets
The maximum U cyclic shift index of the minimum value of ring shift intervals.
Wherein, two cyclic shifts index C1With C2Cyclic shift interval definition be min V- | C1-C2|,|C1-C2
|}.Still by taking Fig. 7 as an example, it is 4 that system, which transmits number of plies U, it is assumed that the cyclic shift index number V that current system is supported is 12, is taken
Value is 0 to 11, then needs minimum value maximum 4 that selection meets cyclic shift interval from 12 cyclic shift indexes to recycle
Displacement index, eventually by compare it is found that value be 0 to 11 12 cyclic shifts index in, 3 groups below ([0,3,6,
9], [1,4,7,10] or [2,5,8,11]) cyclic shift index in any group included by 4 cyclic shifts index circulation
The minimum value of shift intervals is 3, it is maximum minimal circulation shift intervals in all 4 cyclic shifts indexes.
Step 3: U cyclic shift of selection is indexed, corresponding U for distributing to previous cycle displacement user's cluster and including
System transport layer；
Preferably, any one in U cyclic shift index is distributed to and is with optimal resource utilization
System transport layer；Designated cycle displacement index in remaining U-1 cyclic shift index is distributed to suboptimum resource utilization
System transport layer, wherein designated cycle displacement index meets the circulation between the 1st cyclic shift of distribution index
Shift intervals are maximum；Designated cycle displacement index in remaining U-2 cyclic shift index, which is distributed to, has time suboptimum resource
The system transport layer of utilization rate, wherein the designated cycle displacement index, which meets, indexes it with 2 cyclic shifts before distribution
Between minimal circulation shift intervals it is maximum；And so on, until U cyclic shift index is all assigned to corresponding system transmission
Layer.If two or more system transport layer resource utilizations having the same, one of system is randomly choosed
Transport layer of uniting carries out the distribution of cyclic shift index.Still by taking Fig. 7 as an example, it is assumed that the resource utilization of 4 system transport layers according to
Secondary reduction, and 4 cyclic shifts index of step 2 output is [0,3,6,9], then is sequentially allocated and transmits to above-mentioned 4 systems
The cyclic shift index of layer can be 0,6,3 and 9.
Step 4: the cyclic shift index of user is equal to the cyclic shift rope for the system transport layer that the user is mapped to
Draw.
Still by taking Fig. 7 as an example, user 1, user 2 and user 3 are mapped to system transport layer 1, and cyclic shift index is 0；With
Family 4, user 5 and user 6 are mapped to system transport layer 2, and cyclic shift index is 6；User 7, user 8 and user 9 are mapped to and are
System transmitting layer 3, cyclic shift index are 3；User 10 is mapped to system transport layer 4, and cyclic shift index is 9.
It should be noted that in the above-described embodiments, network side is that the user in same cyclic shift user cluster distributes phase
Same DMRS motif column index；Network side can be by system message, control information or reference signal carrying for generating DMRS
The parameter of sequence.
The embodiment of the present invention also provides a kind of uplink demodulation reference signal launching technique, as shown in figure 8, this method is mainly wrapped
It includes:
Step 801, user side receives the parameter for being used to generate DMRS sequence that network side is sent, and the parameter includes: to be
Regiment commander is wide, resource block index, cyclic shift indexes and DMRS motif column index.
Step 802, parameter determines corresponding DMRS sequence to user side based on the received, and sends out on corresponding physical resource
Penetrate the DMRS sequence.
Wherein, parameter determines corresponding DMRS sequence to the user side based on the received, comprising:
According to the system bandwidth and DMRS motif column index, the DMRS basic sequence of system bandwidth length is obtained；
It is indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generates system bandwidth length
Interim DMRS sequence；
The interim DMRS sequence is intercepted according to resource block index, and using obtained corresponding truncation sequence as final
DMRS sequence.
Preferably, described index according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generate
The interim DMRS sequence of system bandwidth length, comprising:
Circulative shift operation is carried out according to DMRS basic sequence of the cyclic shift index to the system bandwidth length, and
Using the cyclically shifted sequences of output as the interim DMRS sequence of user.
Preferably, the length (final DMRS sequence length) of interception, which is equal to the resource block, indexes the total of corresponding subcarrier
Number, the position of interception are the position that the resource block indexes corresponding subcarrier.
It should also be noted that, in embodiments of the present invention, the user refers to current scheduled user；
All 1 layer of the transmission number of plies of the user, wherein the transmission number of plies is otherwise known as the order (RANK) of channel,
Show the individual transmission channel number currently supported；If it is N(N > 1 that actual user, which transmits the number of plies) layer, the user's is N number of
Transport layer will be corresponded with the completely overlapped N number of user of bandwidth in the embodiment of the present invention, and above N number of user sharing is removed and followed
It is other for generating the parameter of DMRS sequence other than ring displacement index；
The resource block index is continuous positive integer sequence, shows determining frequency domain resource position and size；
The system bandwidth is the total available subcarrier number of current system；
The DMRS basic sequence is less than or equal to the cyclic extensions of the largest prime length ZC sequence of system bandwidth, sequence
Length is system bandwidth length；
The cyclic shift is equivalent to frequency domain sequence just for time domain sequences (executing the transformed sequence of IFFT)
The linear phase shift of (sequence before executing IFFT transformation)；
The cyclic shift index I(value is 0 to V-1, wherein V indicates the cyclic shift index number that system is supported) simultaneously
The actual number of bits for not meaning that cyclic shift is I, actual shift digit NCSDepending on following formula: NCS=GI/V, wherein G
Indicate the length of sequence.
The parameter sending method of the corresponding embodiment of the present invention, the embodiment of the invention also provides a kind of parameter sending device,
Suitable for network side, as shown in figure 9, the device mainly includes: parametric distribution module 10 and parameter sending module 20.
Wherein, parametric distribution module 10, for distributing the parameter for generating DMRS sequence, the parameter packet for user side
It includes: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Parameter sending module 20, for the parameter generated to be sent to the user side.
Preferably, parametric distribution module 10 is further used for, partition loops displacement is indexed according to all user resources blocks and is used
Family cluster, the cyclic shift user cluster are that the resource block of set indexes the not minimum user Chong Die with the resource block index outside set
Set；
The cyclic shift index is distributed for the user in each cyclic shift user cluster.
It wherein, is user's distributing cyclic shift index in each cyclic shift user cluster, comprising:
According to the resource block index and pre-defined rule distributed for user, the user reflecting to system transport layer is executed
It penetrates；The pre-defined rule includes at least: a user can only be mapped to a system transport layer, if current system transport layer is surplus
Remaining resource block index is indexed comprising the resource block of active user, then allows active user to be mapped to current system transport layer, otherwise
Do not allow to be mapped to current system transport layer；
According to the user to the mapping of system transport layer, indexed for user's distributing cyclic shift.
According to user to the mapping of system transport layer, indexed for user's distributing cyclic shift, comprising:
Obtain the system transmission number of plies U that previous cycle displacement user's cluster includes；
Selection meets the maximum U of minimum value of cyclic shift interval from all cyclic shifts index that current system is supported
A cyclic shift index；
By the corresponding U system transmission distributed to previous cycle displacement user's cluster and include of the U cyclic shift index of selection
Layer；
User's cyclic shift index is equal to the cyclic shift index for the system transport layer that the user is mapped to.
Wherein, corresponding U for distributing to previous cycle displacement user's cluster and including of the U cyclic shift index by selection
System transport layer, comprising:
Any one in U cyclic shift index is distributed into the transmission of the system with optimal resource utilization
Layer；
Designated cycle displacement index in remaining U-1 cyclic shift index is distributed to suboptimum resource utilization
System transport layer, wherein the circulation that the designated cycle displacement index meets between the 1st cyclic shift of distribution index is moved
Bit interval is maximum；
Designated cycle displacement index in remaining U-2 cyclic shift index, which is distributed to, has time suboptimum resource utilization
System transport layer, wherein designated cycle displacement index meet and distribution the first two cyclic shift index between
Minimal circulation shift intervals are maximum；
And so on, until U cyclic shift index is all assigned to corresponding system transport layer.
Parametric distribution module 10 is further used for, and is that the user in same cyclic shift user cluster distributes identical DMRS base
Sequence index.
The uplink demodulation reference signal launching technique of the corresponding embodiment of the present invention, the embodiment of the invention also provides in one kind
Row demodulated reference signal emitter is suitable for user side, as shown in Figure 10, the device mainly includes: parameter receiving module 30
With signal emission module 40.
Wherein, parameter receiving module, for receiving the parameter for being used to generate DMRS sequence of network side transmission, the parameter
It include: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Signal emission module determines corresponding DMRS sequence for parameter based on the received, and in corresponding physical resource
The upper transmitting DMRS sequence.
Wherein, parameter determines corresponding DMRS sequence to the user side based on the received, comprising:
According to the system bandwidth and DMRS motif column index, the DMRS basic sequence of system bandwidth length is obtained；
It is indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generates system bandwidth length
Interim DMRS sequence；
The interim DMRS sequence is intercepted according to resource block index, and using obtained corresponding truncation sequence as final
DMRS sequence.
It is described to be indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generate system band
The interim DMRS sequence of wide length, comprising:
Circulative shift operation is carried out according to DMRS basic sequence of the cyclic shift index to the system bandwidth length, and
Using the cyclically shifted sequences of output as the interim DMRS sequence of user.
The length of the interception is equal to the sum that the resource block indexes corresponding subcarrier, and the position of interception is the money
Source block indexes the position of corresponding subcarrier.
Parameter is sent below with reference to specific example and the method for uplink demodulation reference signal transmitting is further elaborated on.
As shown in figure 11, in example one of the invention, previous cycle is shifted including user 1 and user 2 in user's cluster, and
And resource block index part is overlapped；User 1 is mapped to system transport layer 1, and user 2 is mapped to system transport layer 2, and total system passes
Defeated number of plies U is two layers；The cyclic shift index sum V that system is supported is 12 (value is 0 to 11).
User 1 obtains system bandwidth BW, and resource block indexes RBIU1, cyclic shift index 0, DMRS motif column index A；User
2 obtain system bandwidth BW, and resource block indexes RBIU2, cyclic shift index 6, DMRS motif column index A.Wherein, resource block indexes
RBIU1With RBIU2It partly overlaps.Since user 1 and user 2 belong to identical cyclic shift user cluster, network side configures user 1
Identical DMRS motif column index A is used with user 2.Since total system transmission number of plies U is two layers, and the circulation that system is supported
Shifting index number V is 12, and the maximum two cyclic shifts index of minimum value for obtaining cyclic shift interval can be 0 and 6, this
Sample, the corresponding cyclic shift index of two systems transport layer can be respectively 0 and 6；Since user 1 is mapped to system transport layer 1,
User 2 is mapped to system transport layer 2, and the cyclic shift index of user 1 can be 0, and the cyclic shift index of user 2 can be 6.
User 1 obtains the DMRS basic sequence of system bandwidth BW length according to system bandwidth BW and DMRS motif column index A
SA；User 2 obtains the DMRS basic sequence S of system bandwidth BW length according to system bandwidth BW and DMRS motif column index AA.Due to
The DMRS basic sequence of system bandwidth BW length is defined as the largest prime M less than or equal to system bandwidthZCLength ZC sequence
Cyclic extensions, and it is less than or equal to the largest prime M of system bandwidthZCThe ZC sequence of length shares MZC- 1, therefore, system band
The DMRS basic sequence of wide BW length also shares MZC- 1；Wherein, the DMRS of which specifically used system bandwidth BW length of user
Basic sequence depends on the DMRS motif column index obtained；In this example, the DMRS motif column index that user 1 and user 2 obtain
DMRS motif for A, system bandwidth BW length corresponding with DMRS motif column index A is classified as SA。
User 1 is according to the DMRS basic sequence S of system bandwidth BW lengthA1 system bandwidth of user is generated with cyclic shift index 0
The interim DMRS sequence of BW length；User 2 is according to system bandwidth BW length DMRS basic sequence SAUse is generated with cyclic shift index 6
The 2 interim DMRS sequence of system bandwidth BW length of family.Specifically, user 1 indexes 0 couple of DMRS basic sequence S according to cyclic shiftAIt executes
Circulative shift operation, and by the cyclically shifted sequences S of outputA0Interim DMRS sequence as user 1；User 2 moves according to circulation
Position index 6 is to DMRS basic sequence SACirculative shift operation is executed, and by the cyclically shifted sequences S of outputA6As the interim of user 2
DMRS sequence.
User 1 indexes RBI according to resource blockU1Intercept interim DMRS sequence SA0, and sequence will be truncated accordingly as user
1 final DMRS sequence SA0-U1；Wherein, intercepted length (sequence SA0-U1Length) it is equal to resource block index RBIU1Corresponding sub- load
The sum of wave, interception position are that resource block indexes RBIU1The position of corresponding subcarrier.User 2 indexes RBI according to resource blockU2
Intercept interim DMRS sequence SA6, and the DMRS sequence S that corresponding truncation sequence is final as user 2A6-U2；Wherein, interception length
Spend (sequence SA6-U2Length) it is equal to resource block index RBIU2The sum of corresponding subcarrier, interception position are resource block index
RBIU2The position of corresponding subcarrier.User 1 is in respective physical transmitted on resources DMRS sequence SA0-U1；User 2 is in respective physical
Transmitted on resources DMRS sequence SA6-U2。
As shown in figure 12, in example two of the invention, it includes user 1, user 2 and user that previous cycle, which shifts user's cluster,
3, and user 1 is Chong Die with 3 resource block index part of user, and user 2 is Chong Die with 3 resource block index part of user, user 1 and use
2 resource block of family index is not overlapped；User 1 and 2 is mapped to system transport layer 1, and user 3 is mapped to system transport layer 2, and total is
System transmission number of plies U is two layers；The cyclic shift index sum V that system is supported is 12 (value is 0 to 11).
User 1 obtains system bandwidth BW, and resource block indexes RBIU1, cyclic shift index 0, DMRS motif column index A；User
2 obtain system bandwidth BW, and resource block indexes RBIU2, cyclic shift index 0, DMRS motif column index A；User 3 obtains system band
Wide BW, resource block index RBIU3, cyclic shift index 6, DMRS motif column index A.Wherein, resource block indexes RBIU1With resource
Block indexes RBIU3It partly overlaps, resource block indexes RBIU2RBI is indexed with resource blockU3It partly overlaps.Due to user 1,2 and of user
User 3 belongs to identical cyclic shift user cluster, and network side configures user 1, user 2 and user 3 and uses identical DMRS motif
Column index.Since total system transmission number of plies U is 2, and the cyclic shift index number V that system is supported is 12, obtains circulation and moves
The maximum 2 cyclic shifts index of the minimum value of bit interval can be 0 and 6, in this way, the corresponding circulation of two systems transport layer is moved
Position index can be respectively 0 and 6；Since user 1 and 2 is mapped to system transport layer 1, user 3 is mapped to system transport layer 2, uses
The cyclic shift of family 1 and 2 index can be 0, and 3 cyclic shift of user index can be 6.
User 1 obtains the DMRS basic sequence of system bandwidth BW length according to system bandwidth BW and DMRS motif column index A
SA；User 2 obtains the DMRS basic sequence S of system bandwidth BW length according to system bandwidth BW and DMRS motif column index AA；User
3 obtain the DMRS basic sequence S of system bandwidth BW length according to system bandwidth BW and DMRS motif column index AA.Due to system bandwidth
The DMRS basic sequence of BW length is defined as the largest prime M less than or equal to system bandwidthZCThe cyclic extensions of length ZC sequence,
And it is less than or equal to the largest prime M of system bandwidthZCLength ZC sequence shares MZC- 1, therefore, system bandwidth BW length DMRS
Basic sequence also shares MZC- 1；Wherein, the DMRS basic sequence of which specifically used system bandwidth BW length of user depends on obtaining
The DMRS motif column index taken, in this example, the DMRS motif column index that user 1, user 2 and user 3 obtain are A, with
The DMRS motif of the corresponding system bandwidth BW length of DMRS motif column index A is classified as SA。
User 1 is according to the DMRS basic sequence S of system bandwidth BW lengthA1 system bandwidth of user is generated with cyclic shift index 0
The interim DMRS sequence of BW length；User 2 is according to system bandwidth BW length DMRS basic sequence SAUse is generated with cyclic shift index 0
The 2 interim DMRS sequence of system bandwidth BW length of family；User 3 is according to system bandwidth BW length DMRS basic sequence SAWith cyclic shift rope
Draw 6 generation user, the 3 interim DMRS sequence of system bandwidth BW length.Specifically, user 1 indexes 0 pair of system band according to cyclic shift
Wide BW length DMRS basic sequence SACirculative shift operation is executed, and by the cyclically shifted sequences S of outputA0It is interim as user 1
DMRS sequence；User 2 indexes 0 couple of system bandwidth BW length DMRS basic sequence S according to cyclic shiftACirculative shift operation is executed,
And by the cyclically shifted sequences S of outputA0As the interim DMRS sequence of user 2；User 3 indexes 6 pairs of system bands according to cyclic shift
Wide BW length DMRS basic sequence SACirculative shift operation is executed, and by the cyclically shifted sequences S of outputA6It is interim as user 3
DMRS sequence.
User 1 indexes RBI according to resource blockU1Intercept interim DMRS sequence SA0, and sequence will be truncated accordingly as user
1 final DMRS sequence SA0-U1；Wherein, intercepted length (sequence SA0-U1Length) it is equal to resource block index RBIU1Corresponding sub- load
The sum of wave, interception position are that resource block indexes RBIU1The position of corresponding subcarrier.User 2 indexes RBI according to resource blockU2
Intercept interim DMRS sequence SA0, and the DMRS sequence S that corresponding truncation sequence is final as user 2A0-U2；Wherein, interception length
Spend (sequence SA0-U2Length) it is equal to resource block index RBIU2The sum of corresponding subcarrier, interception position are resource block index
RBIU2The position of corresponding subcarrier.User 3 indexes RBI according to resource blockU3Intercept interim DMRS sequence SA6, and will be corresponding
The sequence DMRS sequence S final as user 3 is truncatedA6-U3；Wherein, intercepted length (sequence SA6-U3Length) it is equal to resource block rope
Draw RBIU3The sum of corresponding subcarrier, the position of interception are that resource block indexes RBIU3The position of corresponding subcarrier.
The embodiment of the present invention uses identical system bandwidth length by configuring the user in same cyclic shift user cluster
DMRS basic sequence, and using the truncation sequence of the cyclically shifted sequences of system bandwidth length DMRS basic sequence as the final of user
DMRS sequence can support that more than two portions of bandwidth overlapping user DMRS's is mutually orthogonal, application or performance no longer by
It is limited to user moving speed, while without the loss of user's spectrum efficiency；In addition, by maximizing spatial reuse user DMRS sequence
Minimal circulation shift intervals between column, the embodiment of the present invention can also preferably support different multidiameter scenes.In turn, energy
Enough channel estimation qualities further promoted in the case of network user's capacity and spatial reuse.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (20)
1. a kind of parameter sending method, which is characterized in that this method comprises:
Network side is that user side distributes the parameter for generating demodulated reference signal DMRS sequence, and the parameter includes: system band
Wide, resource block index, cyclic shift index and DMRS motif column index；
The parameter of generation is sent to the user side by the network side.
2. parameter sending method according to claim 1, which is characterized in that the network side is user side distributing cyclic shift
Index, comprising:
Partition loops are indexed according to all user resources blocks and shift user's cluster, and the cyclic shift user cluster is the resource block of set
The minimum user Chong Die with the resource block index outside set does not gather index；
The cyclic shift index is distributed for the user in each cyclic shift user cluster.
3. parameter sending method according to claim 2, which is characterized in that the use in each cyclic shift user cluster
Family distributing cyclic shift index, comprising:
According to the resource block index and pre-defined rule distributed for user, the mapping of the user to system transport layer is executed；Institute
State pre-defined rule to include at least: a user can only be mapped to a system transport layer, if current system transport layer residue provides
Source block index is indexed comprising the resource block of active user, then allows active user to be mapped to current system transport layer, otherwise do not permit
Permitted to be mapped to current system transport layer；
According to the user to the mapping of system transport layer, indexed for user's distributing cyclic shift.
4. parameter sending method according to claim 3, which is characterized in that the reflecting to system transport layer according to user
It penetrates, is indexed for user's distributing cyclic shift, comprising:
Obtain the system transmission number of plies U that previous cycle displacement user's cluster includes；
Selection meets cyclic shift interval from all cyclic shifts index that current system is supported minimum value maximum U follow
Ring displacement index；
By the corresponding U system transport layer distributed to previous cycle displacement user's cluster and include of the U cyclic shift index of selection；
User's cyclic shift index is equal to the cyclic shift index for the system transport layer that the user is mapped to.
5. parameter sending method according to claim 4, which is characterized in that the U cyclic shift index pair by selection
The U system transport layer that previous cycle displacement user's cluster includes should be distributed to, comprising:
Any one in U cyclic shift index is distributed into the system transport layer with optimal resource utilization；
Designated cycle displacement index in remaining U-1 cyclic shift index is distributed into the system with suboptimum resource utilization
Transport layer, wherein the designated cycle displacement index meets between the cyclic shift between the 1st cyclic shift of distribution index
Every maximum；
Designated cycle displacement index in remaining U-2 cyclic shift index is distributed to and is with time suboptimum resource utilization
Unite transport layer, wherein designated cycle displacement index meet and distribution the first two cyclic shift index between minimum
Cyclic shift interval is maximum；
And so on, until U cyclic shift index is all assigned to corresponding system transport layer.
6. according to any one of claim 2 to the 5 parameter sending method, which is characterized in that this method further comprises:
The network side is that the user in same cyclic shift user cluster distributes identical DMRS motif column index.
7. a kind of uplink demodulation reference signal launching technique, which is characterized in that this method comprises:
User side receives the parameter for being used to generate demodulated reference signal DMRS sequence that network side is sent, and the parameter includes: to be
Regiment commander is wide, resource block index, cyclic shift indexes and DMRS motif column index；
Parameter determines corresponding DMRS sequence to the user side based on the received, and on corresponding physical resource described in transmitting
DMRS sequence.
8. uplink demodulation reference signal launching technique according to claim 7, which is characterized in that the user side is according to reception
Parameter determine corresponding DMRS sequence, comprising:
According to the system bandwidth and DMRS motif column index, the DMRS basic sequence of system bandwidth length is obtained；
It is indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generates facing for system bandwidth length
When DMRS sequence；
According to resource block index intercept the interim DMRS sequence, and using obtained corresponding truncation sequence as finally
DMRS sequence.
9. uplink demodulation reference signal launching technique according to claim 8, which is characterized in that described according to the system band
The DMRS basic sequence of wide length and cyclic shift index, generate the interim DMRS sequence of system bandwidth length, comprising:
Circulative shift operation is carried out according to DMRS basic sequence of the cyclic shift index to the system bandwidth length, and will be defeated
Interim DMRS sequence of the cyclically shifted sequences out as user.
10. uplink demodulation reference signal launching technique according to claim 8, which is characterized in that the length of interception is equal to institute
The sum that resource block indexes corresponding subcarrier is stated, the position of interception is the position that the resource block indexes corresponding subcarrier.
11. a kind of parameter sending device characterized by comprising
Parametric distribution module, for distributing the parameter for generating demodulated reference signal DMRS sequence, the parameter for user side
It include: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Parameter sending module, for the parameter generated to be sent to the user side.
12. parameter sending device according to claim 11, which is characterized in that the parametric distribution module is further used for,
Partition loops are indexed according to all user resources blocks and shift user's cluster, and the cyclic shift user cluster is the resource block index of set
The minimum user Chong Die with the resource block index outside set does not gather；
The cyclic shift index is distributed for the user in each cyclic shift user cluster.
13. parameter sending device according to claim 12, which is characterized in that described in each cyclic shift user cluster
User's distributing cyclic shift index, comprising:
According to the resource block index and pre-defined rule distributed for user, the mapping of the user to system transport layer is executed；Institute
State pre-defined rule to include at least: a user can only be mapped to a system transport layer, if current system transport layer residue provides
Source block index is indexed comprising the resource block of active user, then allows active user to be mapped to current system transport layer, otherwise do not permit
Permitted to be mapped to current system transport layer；
According to the user to the mapping of system transport layer, indexed for user's distributing cyclic shift.
14. the 3 parameter sending device according to claim 1, which is characterized in that the reflecting to system transport layer according to user
It penetrates, is indexed for user's distributing cyclic shift, comprising:
Obtain the system transmission number of plies U that previous cycle displacement user's cluster includes；
Selection meets cyclic shift interval from all cyclic shifts index that current system is supported minimum value maximum U follow
Ring displacement index；
By the corresponding U system transport layer distributed to previous cycle displacement user's cluster and include of the U cyclic shift index of selection；
User's cyclic shift index is equal to the cyclic shift index for the system transport layer that the user is mapped to.
15. the 4 parameter sending device according to claim 1, which is characterized in that the U cyclic shift by selection indexes
The corresponding U system transport layer distributed to previous cycle displacement user's cluster and include, comprising:
Any one in U cyclic shift index is distributed into the system transport layer with optimal resource utilization；
Designated cycle displacement index in remaining U-1 cyclic shift index is distributed into the system with suboptimum resource utilization
Transport layer, wherein the designated cycle displacement index meets between the cyclic shift between the 1st cyclic shift of distribution index
Every maximum；
Designated cycle displacement index in remaining U-2 cyclic shift index is distributed to and is with time suboptimum resource utilization
Unite transport layer, wherein designated cycle displacement index meet and distribution the first two cyclic shift index between minimum
Cyclic shift interval is maximum；
And so on, until U cyclic shift index is all assigned to corresponding system transport layer.
16. any one of 2 to the 15 parameter sending device according to claim 1, which is characterized in that the parametric distribution module into
One step is used for, and is that the user in same cyclic shift user cluster distributes identical DMRS motif column index.
17. a kind of uplink demodulation reference signal emitter, which is characterized in that the device includes:
Parameter receiving module, it is described for receiving the parameter for being used to generate demodulated reference signal DMRS sequence of network side transmission
Parameter includes: system bandwidth, resource block index, cyclic shift index and DMRS motif column index；
Signal emission module determines corresponding DMRS sequence for parameter based on the received, and sends out on corresponding physical resource
Penetrate the DMRS sequence.
18. the 7 uplink demodulation reference signal emitter according to claim 1, which is characterized in that described to join based on the received
Number determines corresponding DMRS sequence, comprising:
According to the system bandwidth and DMRS motif column index, the DMRS basic sequence of system bandwidth length is obtained；
It is indexed according to the DMRS basic sequence of the system bandwidth length and the cyclic shift, generates facing for system bandwidth length
When DMRS sequence；
According to resource block index intercept the interim DMRS sequence, and using obtained corresponding truncation sequence as finally
DMRS sequence.
19. the 8 uplink demodulation reference signal emitter according to claim 1, which is characterized in that described according to the system
The DMRS basic sequence of bandwidth length and cyclic shift index, generate the interim DMRS sequence of system bandwidth length, packet
It includes:
Circulative shift operation is carried out according to DMRS basic sequence of the cyclic shift index to the system bandwidth length, and will be defeated
Interim DMRS sequence of the cyclically shifted sequences out as user.
20. the 8 uplink demodulation reference signal emitter according to claim 1, which is characterized in that the length etc. of the interception
The sum of corresponding subcarrier is indexed in the resource block, the position of interception is the position that the resource block indexes corresponding subcarrier
It sets.
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| CN107425947B (en) * | 2016-05-24 | 2021-02-12 | 北京三星通信技术研究有限公司 | Method and device for mapping reference signals and multiple access resources |
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