CN105634707B - A kind of method, base station and the terminal of information transmission - Google Patents
A kind of method, base station and the terminal of information transmission Download PDFInfo
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- CN105634707B CN105634707B CN201511030027.6A CN201511030027A CN105634707B CN 105634707 B CN105634707 B CN 105634707B CN 201511030027 A CN201511030027 A CN 201511030027A CN 105634707 B CN105634707 B CN 105634707B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The embodiment of the invention discloses method, base station and the terminals of a kind of transmission of information, method includes: quantity of the base station based on the multiple terminals for needing to carry out data transmission, determine the first format information of the DCI of at least one terminal in multiple terminals, including SCID and DMRS, SCID is used to scramble antenna port, and it is mutually orthogonal that DMRS corresponds to DMRS sequence used in different antenna ports and every two DMRS；At least one terminal into multiple terminals sends the first format information of DCI；Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal, so that at least one terminal in the multiple terminal receives the data that base station is sent based on the first format information of DCI.The embodiment of the invention also discloses a kind of base station and terminals.Using the present invention, the utilization rate of frequency spectrum resource can be promoted, meets the needs of MU-MIMO.
Description
Technical field
The present invention relates to method, base station and terminals that field of communication technology more particularly to a kind of information transmit.
Background technique
With the popularization and application of mobile terminal and the sustainable growth of mobile service, wireless transmission rate demand exponentially increases
Long, high-speed, the communication technology of high quality become the goal in research of next generation communication system, with multiple-input and multiple-output (Multi-
Input Multi-Output, abbreviation MIMO) be representative multi-antenna technology be one of the preferred plan for realizing above-mentioned target.Its
In, solid beam excipient (Elevation Beamforming, abbreviation EBF)/Quan Weidu multiple-input and multiple-output (Full for being related to
Dimension Multi-Input Multi-Output, abbreviation FD-MIMO) it is a kind of based on channel state information reference signals
(Channel State Information Reference Signal, abbreviation CSI-RS) feedback and demodulated reference signal
The transmission technology of (Demodulation Reference Signa, abbreviation DMRS) demodulation.
But in the prior art, the transmission plan such as TM9 and TM10 that CSI-RS feedback can be supported to demodulate with DMRS is equal
Only single user multiple-input and multiple-output (Single-User Multi-Input Multi-Output, SU-MIMO) is supported, for nothing
The service efficiency of line communication Intermediate Frequency spectrum resource is still insufficient for demand.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing method, base station and the terminal of a kind of information transmission.
Can meet the needs of multi-user's multiple-input and multiple-output, the service efficiency of frequency spectrum resource can be promoted.
First aspect of the embodiment of the present invention provides a kind of method of information transmission, comprising:
Quantity of the base station based on the multiple terminals for needing to carry out data transmission, determines at least one of the multiple terminal
The first format information of the Downlink Control Information DCI of terminal, first format information include scrambling mark SCID and demodulation ginseng
Examine signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, and the demodulated reference signal DMRS corresponds to
DMRS sequence used in DMRS described in different antenna port and every two is mutually orthogonal；
At least one terminal into multiple terminals sends the first format information of DCI；
Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal,
So that at least one terminal in the multiple terminal receives what the base station was sent based on the first format information of the DCI
Data.
Second aspect of the embodiment of the present invention provides a kind of base station, comprising:
Determination unit determines in the multiple terminal for the quantity based on the multiple terminals for needing to carry out data transmission
At least one terminal Downlink Control Information DCI the first format information, first format information include scrambling mark
SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, the demodulation reference letter
It is mutually orthogonal that number DMRS corresponds to DMRS sequence used in DMRS described in different antenna port and every two；
Transmission unit sends the first format information of DCI at least one terminal into multiple terminals；And it uses
At least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal sends data, so that described more
At least one terminal in a terminal receives the data that the base station is sent based on the first format information of the DCI.
Third aspect present invention provides a kind of method of information transmission, comprising:
At least one terminal in multiple terminals receives the first format information for the Downlink Control Information DCI that base station is sent,
The first format information of the DCI by the base station based on needing the quantity of multiple terminals carried out data transmission to be determined, institute
Stating the first format information includes scrambling mark SCID and demodulated reference signal DMRS, wherein scrambling mark SCID is used for pair
Antenna port scrambling, the demodulated reference signal DMRS correspond to used in DMRS described in different antenna port and every two
DMRS sequence is mutually orthogonal；
The first format information based on the DCI receives the data that the base station is sent.
Fourth aspect present invention provides a kind of terminal, comprising:
First receiving unit, the first format information of the Downlink Control Information DCI for receiving base station transmission, the DCI
The first format information by the base station based on needing the quantity of multiple terminals carried out data transmission to be determined, first lattice
Formula information includes scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used for antenna port
Scrambling, the demodulated reference signal DMRS correspond to DMRS sequence used in DMRS described in different antenna port and every two
It is mutually orthogonal；
Second receiving unit receives the data that the base station is sent for the first format information based on the DCI.
The implementation of the embodiments of the present invention has the following beneficial effects:
By carrying DMRS in DCI format information, under the premise of no increase new DCI load, port is extended
Quantity.And since these ports have used mutually orthogonal DMRS sequence, between the channel estimation of different terminals not
There are interference, terminal can accurately obtain the channel estimation results of itself, meet the transmission demand under MU-MIMO scene, mention
The high utilization efficiency of frequency spectrum resource.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow diagram of the first embodiment of the method for information transmission of the present invention；
Fig. 2 is a kind of flow diagram of the second embodiment of the method for information transmission of the present invention；
Fig. 3 is a kind of flow diagram of the 3rd embodiment of the method for information transmission of the present invention；
Fig. 4 is a kind of composition schematic diagram of the first embodiment of base station of the present invention；
Fig. 5 is a kind of composition schematic diagram of the second embodiment of base station of the present invention；
Fig. 6 is a kind of composition schematic diagram of the 3rd embodiment of base station of the present invention；
Fig. 7 is a kind of flow diagram of the first embodiment of the method for information transmission of the present invention；
Fig. 8 is a kind of composition schematic diagram of the first embodiment of terminal of the present invention；
Fig. 9 is a kind of composition schematic diagram of the second embodiment of terminal of the present invention；
Figure 10 is the system architecture schematic diagram of base station of the present invention and terminal composition.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Terminal in the embodiment of the present invention may include smart phone (such as Android phone, iOS mobile phone, Windows
Phone mobile phone etc.), tablet computer, palm PC, laptop, mobile internet device (Mobile Internet
Devices, abbreviation MID) or wearable device etc., above-mentioned terminal is only citing, and non exhaustive, including but not limited to above-mentioned end
End.
Fig. 1 is please referred to, is a kind of flow diagram of the first embodiment of the method for information transmission of the present invention, in this implementation
In example, it the described method comprises the following steps:
S101, quantity of the base station based on the multiple terminals for needing to carry out data transmission, determines in the multiple terminal extremely
The first format information of the Downlink Control Information DCI of a few terminal.
First format information includes scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark
SCID is used to scramble antenna port, and the demodulated reference signal DMRS corresponds to described in different antenna port and every two
DMRS sequence used in DMRS is mutually orthogonal.
S102, at least one terminal into multiple terminals send the first format information of DCI.
S103 is sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal
Data, so that at least one terminal in the multiple terminal receives the base station based on the first format information of the DCI
The data of transmission.
In the present embodiment, by carrying DMRS in DCI format information, in no premise for increasing new DCI load
Under, extend the quantity of port.And since these ports have used mutually orthogonal DMRS sequence, the letter of different terminals
There is no interference between road estimation, terminal can accurately obtain the channel estimation results of itself, meet under MU-MIMO scene
Transmission demand improves the utilization efficiency of frequency spectrum resource.
It referring to figure 2., is a kind of flow diagram of the first embodiment of the method for information transmission of the present invention, in this implementation
In example, it the described method comprises the following steps:
S201, the first format information of DCI is arranged in base station, in port information table corresponding with first format information of DCI
In, removal scrambling mark SCID simultaneously configures preset list item for carrying demodulated reference signal DMRS.Wherein, it is wrapped in the DMRS
Containing port numbers and DMRS sequence.
It due to eliminating SCID, and joined DMRS, extend orthogonal port number in this way.And it can be by base after SCID
It stands and is uniformly configured to zero.
For example, for using orthogonal code (Orthogonal Cover Code, abbreviation OCC)=4 Hes supported such as lower port
The DMRS scheme of 12 resource elements (Resource Element, RE).
| Port for MU-MIMO | OCC |
| Port 7 | [1 1 1 1] |
| Port 8 | [1-1 1-1] |
| Port 11 | [1 1-1 -1] |
| Port 13 | [1 -1 -1 1] |
It is such as original by the way that port information such as port numbers, DMRS sequence are configured to the default list item in port information table
Carry the list item or other not used list items in MU-MIMO of SCID.The change to DCI format is just realized in this way.
It specifically can refer to 36.212 table 5.3.3.1.5C-1 of agreement and be arranged under the first format generation later of DCI
Table:
Wherein, the right list item is the content of former agreement, and left side list item is the table of generation after the first format that DCI is arranged
?.Originally orthogonal port number only there are two, by will in original port information table carrying SCID list item 0 and 1 in
Content removal, and be used for the relevant information such as port numbers and DMRS sequence of storage port 7 and port 8, and will be in list item 2 and 3
Content replace with the relevant information of port 11 and port 13, orthogonal port number can be expanded to 4.
S202, the terminal quantity if desired carried out data transmission are less than or equal to four, then the base station is each terminal
The SCID for distributing different ports, and DMRS sequence used in all of the port being arranged is zero.
For example, when there are four terminals when synchronization initiates data transfer request, after base station can be according to expansion
DMRS port quantity and port numbers are four terminal distribution port numbers, and if terminal 1 uses port 7, OCC sequence is [1 11 1]；
Terminal 2 uses port 8, and OCC sequence is [1-1 1-1]；Terminal 3 uses port 11, and OCC sequence is [1 1-1-1]；Terminal
4 use port 13, and OCC sequence is [1-1-1 1].The DMRS sequence of four terminals keeps mutually orthogonal.
S203, the base station to each terminal and are completed each according to the DCI that first format of DCI sends carrying DMRS
The data dispatch of terminal completes channel estimation and data demodulation according to the port of distribution and DMRS sequence so as to each terminal.
After base station sends messages to terminal according to the first format of DCI, terminal decodes DCI first, obtains DCI content,
The DMRS port number of this terminal distribution is obtained, completes channel estimation and data demodulation followed by DMRS sequence.Due to four
Port has used orthogonal OCC sequence, thus between the channel estimation of different user there is no interference, UE can accurately obtained from
The channel estimation results of body.
In the present embodiment, by removing SCID, and DMRS is carried in DCI format information, increases new DCI no
Under the premise of load, the quantity of port is extended.And since these ports have used mutually orthogonal DMRS sequence, no
With, there is no interference, terminal can accurately obtain the channel estimation results of itself, and satisfaction is in MU- between the channel estimation of terminal
Transmission demand under MIMO scene improves the utilization efficiency of frequency spectrum resource.
It referring to figure 3., is a kind of flow diagram of the second embodiment of the method for information transmission of the present invention, in this implementation
In example, it the described method comprises the following steps:
S301, the first format information of DCI is arranged in base station, in port information table corresponding with first format information of DCI
In, removal scrambling mark SCID simultaneously configures preset list item for carrying demodulated reference signal DMRS.Wherein, it is wrapped in the DMRS
Containing port numbers and DMRS sequence.
It due to eliminating SCID, and joined DMRS, extend orthogonal port number in this way.And it can be by base after SCID
It stands and is uniformly configured to zero.
For example, for using orthogonal code (Orthogonal Cover Code, abbreviation OCC)=4 Hes supported such as lower port
The DMRS scheme of 12 resource elements (Resource Element, RE).
| Port for MU-MIMO | OCC |
| Port 7 | [1 1 1 1] |
| Port 8 | [1 -1 1 -1] |
| Port 11 | [1 1 -1 -1] |
| Port 13 | [1 -1 -1 1] |
It is such as original by the way that port information such as port numbers, DMRS sequence are configured to the default list item in port information table
Carry the list item or other not used list items in MU-MIMO of SCID.The change to DCI format is just realized in this way.
S302, the terminal quantity if desired carried out data transmission are greater than four, then the base station is that wherein four terminals are divided
With the port that DMRS sequence is mutually orthogonal, and the SCID that DMRS sequence used in four terminals is arranged is zero.
S303, for other terminals except four terminals, the base station is other described terminal distribution ports.
It herein, can be the identical DMRS port of other terminal distributions except four terminals, such as eight terminals altogether can
Think that first four terminal is sequentially allocated 7,8,11,13 different ports, rear four terminals can with fixed allocation port 7 or other
Any a port；Or the different DMRS port of other terminal distributions except four terminals, for example terminal 5- terminal 8
Different ports is distributed, or is that terminal 5 and 6 distributes identical port and is that terminal 7 and 8 distributes identical port, Huo Zhewei
Terminal 5- terminal 7 distributes identical port and distributes a different port for terminal 8, and the embodiment of the present invention is not limited in any way
It limits.
S304 calculates the orthogonal DMRS sequence of puppet of each terminal in other described terminals.
Optionally, the orthogonal DMRS sequence of the puppet is according to radio network temporary identifier (the RNTI Radio of terminal
Network Tempory Identity, abbreviation RNTI) it is calculated.Since the RNTI of each terminal is different, calculate
The orthogonal DMRS sequence of puppet arrived is different, and the orthogonal DMRS sequence of puppet obtained by calculation can also be played and be interfered between limiting terminal
Effect, it can be ensured that the performance of each terminal channel estimation.
Specifically, the orthogonal DMRS sequence of the puppet is generated according to pseudo-random sequence initialization factor, the pseudo-random sequence
Initialization factor is calculated according to the following formula:
Wherein, cinitFor pseudo-random sequence initialization factor, nsIt is indexed for time slot,For cell identification code, nRNTIFor
The radio network temporary identifier of terminal；
The orthogonal DMRS sequence of the puppet is calculated according to the following formula:
Wherein,For pseudo- orthogonal DMRS sequence, c is according to cinitThe pseudo-random sequence of generation, j are pseudo- orthogonal
The imaginary part (its value be negative 1) of DMRS sequence, m is sequence index, and It indicates
The physical block number that Physical Downlink Shared Channel occupies.
S305, is arranged the second format information of DCI, and reservation (Reserved) list item configured in the port information table is used for
The orthogonal DMRS sequence of carrying puppet corresponding with terminal identity.It specifically can refer to the second embodiment of the method for information transmission of the present invention
List item 7 in middle list, list item 7 are to retain list item.
S306, at least one terminal into multiple terminals send the second format information of DCI to receive the second lattice
Base station described in the corresponding DMRS sequence in port and port of the terminal of formula information based on distribution or pseudo- orthogonal DMRS sequential reception
The data of transmission.
Concrete scene can be found in Figure 10, be the system architecture schematic diagram of present aspect base station of the present invention and terminal composition.Such as figure
Shown in 10, in synchronization, there are eight terminal needs to carry out data transmission, according to the scheduling of base station, be by four user configurations
MU-MIMO mode, and DMRS port 7 is distributed for first four user, 8,11,13, rear four users are fixed to occupy port 7, uses
The specific pseudo- orthogonal DMRS sequence of terminal, sends terminal for DCI by the second DCI format information.
The SCID for the DMRS sequence that base station static configuration first four terminal uses is zero, and rear four ports are due to using terminal
Specific pseudo- orthogonal DMRS sequence, therefore do not need static configuration SCID parameter.According to above-mentioned configuration, terminal 1 uses port 7,
OCC sequence is [1 11 1]；Terminal 2 uses port 8, and OCC sequence is [1-1 1-1]；Terminal 3 uses port 11, OCC sequence
For [1 1-1-1]；Terminal 4 uses port 13, and OCC sequence is [1-1-11].The DMRS sequence of four terminals is kept mutually just
It hands over.Terminal 5-7 uses port 7, and OCC sequence is [1 11 1], passes through pseudo- orthogonal DMRS sequence limitation interference each other.?
Terminal side, terminal decode DCI first, obtain DCI content, the DMRS port number of this terminal distribution are obtained, followed by DMRS sequence
Column complete channel estimation and subsequent data demodulation.First four port has used orthogonal OCC sequence, therefore terminal 1-4
There is no interference between channel estimation, terminal can accurately obtain the channel estimation results of itself.Terminal 5-8 passes through DMRS sequence
Pseudo- orthogonality limit inter-user interference, it is also ensured that the performance of channel estimation.
In the present embodiment, orthogonal using its puppet by carrying specific pseudo- orthogonal DMRS sequence in port information table
Property can further realize the expansion to port number, support the MIMO demand of more users, further improve frequency spectrum resource
Utilization efficiency.
It referring to figure 4., is a kind of composition schematic diagram of the first embodiment of base station of the present invention, it is in the present embodiment, described
Base station includes:
Determination unit 100 determines the multiple terminal for the quantity based on the multiple terminals for needing to carry out data transmission
In at least one terminal Downlink Control Information DCI the first format information, first format information include scrambling mark
SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, the demodulation reference letter
It is mutually orthogonal that number DMRS corresponds to DMRS sequence used in DMRS described in different antenna port and every two；
Transmission unit 200 sends the first format information of DCI at least one terminal into multiple terminals；And
Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal, so that institute
At least one terminal stated in multiple terminals receives the data that the base station is sent based on the first format information of the DCI.
The determination unit is specifically used for setting the first format information of DCI, corresponding with first format information of DCI
In port information table, it includes port in the DMRS that removal scrambling mark SCID, which simultaneously configures preset list item for carrying DMRS,
Number and DMRS sequence；
If desired the terminal quantity carried out data transmission is less than or equal to four, then the end different for each terminal distribution
Mouthful, and the SCID that DMRS sequence used in all of the port is arranged is zero.
It due to eliminating SCID, and joined DMRS, extend orthogonal port number in this way.And it can be by base after SCID
It stands and is uniformly configured to zero.
For example, for using orthogonal code (Orthogonal Cover Code, abbreviation OCC)=4 Hes supported such as lower port
The DMRS scheme of 12 resource elements (Resource Element, RE).
| Port for MU-MIMO | OCC |
| Port 7 | [1 1 1 1] |
| Port 8 | [1 -1 1-1] |
| Port 11 | [1 1 -1 -1] |
| Port 13 | [1 -1 -1 1] |
It is such as original by the way that port information such as port numbers, DMRS sequence are configured to the default list item in port information table
Carry the list item or other not used list items in MU-MIMO of SCID.The change to DCI format is just realized in this way.
For example, when there are four terminals when synchronization initiates data transfer request, after base station can be according to expansion
DMRS port quantity and port numbers are four terminal distribution port numbers, and if terminal 1 uses port 7, OCC sequence is [1 11 1]；
Terminal 2 uses port 8, and OCC sequence is [1-1 1-1]；Terminal 3 uses port 11, and OCC sequence is [1 1-1-1]；Terminal
4 use port 13, and OCC sequence is [1-1-1 1].The DMRS sequence of four terminals keeps mutually orthogonal.
After base station sends messages to terminal according to the first format information of DCI, terminal decodes DCI first, obtains in DCI
Hold, obtain the DMRS port number of this terminal distribution, completes channel estimation and data demodulation followed by DMRS sequence.Due to four
A port has used orthogonal OCC sequence, therefore there is no interference between the channel estimation of different user, UE can be obtained accurately
The channel estimation results of itself.
By removing SCID, and DMRS port information is carried in the preset list item of port information table, increase newly no
DCI load under the premise of, extend the quantity of DMRS port.And due to having used mutually orthogonal DMRS between these ports
Sequence, therefore there is no interference between the channel estimation of different terminals, terminal can accurately obtain the channel estimation results of itself,
Meet the transmission demand under MU-MIMO scene, improves the utilization efficiency of frequency spectrum resource.
It referring to figure 5., is a kind of composition schematic diagram of the second embodiment of base station of the present invention, it is in the present embodiment, described
Base station includes:
Determination unit 100 determines the multiple terminal for the quantity based on the multiple terminals for needing to carry out data transmission
In at least one terminal Downlink Control Information DCI the first format information, first format information include scrambling mark
SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, the demodulation reference letter
It is mutually orthogonal that number DMRS corresponds to DMRS sequence used in DMRS described in different antenna port and every two；
Transmission unit 200 sends the first format information of DCI at least one terminal into multiple terminals；And
Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal, so that institute
At least one terminal stated in multiple terminals receives the data that the base station is sent based on the first format information of the DCI.
The determination unit 100 be specifically used for setting the first format information of DCI, with first format information pair of DCI
In the port information table answered, removal scrambling mark SCID simultaneously configures preset list item for carrying DMRS, includes in the DMRS
Port numbers and DMRS sequence；
If desired the terminal quantity carried out data transmission is less than or equal to four, then the end different for each terminal distribution
Mouthful, and the SCID that DMRS sequence used in all of the port is arranged is zero.
It due to eliminating SCID, and joined DMRS, extend orthogonal port number in this way.And it can be by base after SCID
It stands and is uniformly configured to zero.
For example, for using orthogonal code (Orthogonal Cover Code, abbreviation OCC)=4 Hes supported such as lower port
The DMRS scheme of 12 resource elements (Resource Element, RE).
| Port for MU-MIMO | OCC |
| Port 7 | [1 1 1 1] |
| Port 8 | [1 -1 1 -1] |
| Port 11 | [1 1 -1 -1] |
| Port 13 | [1 -1 -1 1] |
It is such as original by the way that port information such as port numbers, DMRS sequence are configured to the default list item in port information table
Carry the list item or other not used list items in MU-MIMO of SCID.The change to DCI format is just realized in this way.
For example, when there are four terminals when synchronization initiates data transfer request, after base station can be according to expansion
DMRS port quantity and port numbers are four terminal distribution port numbers, and if terminal 1 uses port 7, OCC sequence is [1 11 1]；
Terminal 2 uses port 8, and OCC sequence is [1-1 1-1]；Terminal 3 uses port 11, and OCC sequence is [1 1-1-1]；Terminal
4 use port 13, and OCC sequence is [1-1-1 1].The DMRS sequence of four terminals keeps mutually orthogonal.
After base station sends messages to terminal according to the first format information of DCI, terminal decodes DCI first, obtains in DCI
Hold, obtain the DMRS port number of this terminal distribution, completes channel estimation and data demodulation followed by DMRS sequence.Due to four
A port has used orthogonal OCC sequence, therefore there is no interference between the channel estimation of different user, UE can be obtained accurately
The channel estimation results of itself.
If desired the terminal quantity carried out data transmission is greater than four, then the determination unit 100 is used to be wherein four
The mutually orthogonal port of terminal distribution DMRS sequence, and the SCID that DMRS sequence used in four terminals is arranged is zero；
For other terminals except four terminals, the determination unit 100 is also used to as other described terminals point
With port；
The base station further includes computing unit 300, and the computing unit 300 is for calculating each end in other described terminals
The orthogonal DMRS sequence of puppet at end；
The determination unit 100 is also used to be arranged the second format information of DCI, configures the reservation table in the port information table
Item is for the orthogonal DMRS sequence of carrying puppet corresponding with terminal identity；
The transmission unit 300 is also used to the second format information that at least one terminal into multiple terminals sends DCI
To receive the terminal of the second format information based on the corresponding DMRS sequence in the port of distribution and port or pseudo- orthogonal DMRS
The data that transmission unit described in sequential reception is sent.
It herein, can be the identical DMRS port of other terminal distributions except four terminals, such as eight terminals altogether can
Think that first four terminal is sequentially allocated 7,8,11,13 different ports, rear four terminals can with fixed allocation port 7 or other
Any a port；Or the different DMRS port of other terminal distributions except four terminals, for example terminal 5- terminal 8
Different ports is distributed, or is that terminal 5 and 6 distributes identical port and is that terminal 7 and 8 distributes identical port, Huo Zhewei
Terminal 5- terminal 7 distributes identical port and distributes a different port for terminal 8, and the embodiment of the present invention is not limited in any way
It limits.
The orthogonal DMRS sequence of the puppet is calculated according to the radio network temporary identifier of terminal.
The orthogonal DMRS sequence of the puppet is generated with specific reference to pseudo-random sequence initialization factor, and the computing unit 300 has
Body for being calculated the pseudo-random sequence initialization factor according to the following formula:
Wherein, cinitFor pseudo-random sequence initialization factor, nsIt is indexed for time slot,For cell identification code, nRNTIFor
The radio network temporary identifier of terminal；
The computing unit 300 is specifically used for that pseudo- orthogonal DMRS sequence is calculated according to the following formula:
Wherein,For pseudo- orthogonal DMRS sequence, c is according to cinitThe pseudo-random sequence of generation, j are pseudo- orthogonal
The imaginary part of DMRS sequence, m are sequence index, and Indicate that physical down is total
Enjoy the physical block number of channel occupancy.
Concrete scene can be found in Figure 10, be the system architecture schematic diagram of present aspect base station of the present invention and terminal composition.Such as figure
Shown in 10, in synchronization, there are eight terminal needs to carry out data transmission, according to the scheduling of base station, be by four user configurations
MU-MIMO mode, and DMRS port 7 is distributed for first four user, 8,11,13, rear four users are fixed to occupy port 7, uses
The specific pseudo- orthogonal DMRS sequence of terminal, sends terminal for DCI by the second DCI format.
The SCID for the DMRS sequence that base station static configuration first four terminal uses is zero, and rear four ports are due to using terminal
Specific pseudo- orthogonal DMRS sequence, therefore do not need static configuration SCID parameter.According to above-mentioned configuration, terminal 1 uses port 7,
OCC sequence is [1 11 1]；Terminal 2 uses port 8, and OCC sequence is [1-1 1-1]；Terminal 3 uses port 11, OCC sequence
It is classified as [1 1-1-1]；Terminal 4 uses port 13, and OCC sequence is [1-1-1 1].The DMRS sequence of four terminals keeps phase
It is mutually orthogonal.Terminal 5-7 uses port 7, and OCC sequence is [1 11 1], dry by pseudo- orthogonal DMRS sequence limitation each other
It disturbs.In terminal side, terminal decodes DCI first, obtains DCI content, obtains the DMRS port number of this terminal distribution, followed by
DMRS sequence completes channel estimation and subsequent data demodulation.First four port has used orthogonal OCC sequence, therefore terminal
There is no interference between the channel estimation of 1-4, terminal can accurately obtain the channel estimation results of itself.Terminal 5-8 passes through
The pseudo- orthogonality of DMRS sequence limits inter-user interference, it is also ensured that the performance of channel estimation.
In the present embodiment, orthogonal using its puppet by carrying specific pseudo- orthogonal DMRS sequence in port information table
Property can further realize the expansion to port number, support the MIMO demand of more users, further improve frequency spectrum resource
Utilization efficiency.
Fig. 6 is please referred to, it is in the present embodiment, described for a kind of composition schematic diagram of the 3rd embodiment of base station of the present invention
Base station includes:
Processor 1101, interface circuit 1102, memory 1103 and bus 1104, the processor 1101, interface circuit
1102 and memory 1103 connected by the bus 1104 and complete mutual communication, wherein in the memory 1103
Store batch processing code, the processor 1101 for calling the program code stored in the memory 1103, execute with
Lower operation:
Based on the quantity for the multiple terminals for needing to carry out data transmission, at least one terminal in the multiple terminal is determined
Downlink Control Information DCI the first format information, first format information include scrambling mark SCID and demodulation reference letter
Number DMRS, wherein the scrambling mark SCID is used to scramble antenna port, and the demodulated reference signal DMRS corresponds to difference
Antenna port and every two described in DMRS sequence used in DMRS it is mutually orthogonal；
The first format information of DCI is sent by least one terminal of interface circuit 1102 into multiple terminals；And
Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal, so that institute
At least one terminal stated in multiple terminals receives the data that the base station is sent based on the first format information of the DCI.
Optionally, the processor 1101 is specifically used for:
The first format information of DCI is set, and in port information table corresponding with first format information of DCI, removal adds
It disturbs mark SCID and configures preset list item for carrying DMRS, include port numbers and DMRS sequence in the DMRS；
If desired the terminal quantity carried out data transmission is less than or equal to four, then the end different for each terminal distribution
Mouthful, and the SCID that DMRS sequence used in all of the port is arranged is zero.
Optionally, the terminal quantity if desired carried out data transmission is greater than four, and the processor 1101 is also used to:
For the port that wherein four terminal distribution DMRS sequences are mutually orthogonal, and it is arranged used in four terminals
The SCID of DMRS sequence is zero；
For other terminals except four terminals, for other described terminal distribution ports；
Calculate the orthogonal DMRS sequence of puppet of each terminal in other described terminals；
The second format information of DCI is set, configures the reservation list item in the port information table for carrying and terminal identity
The orthogonal DMRS sequence of corresponding puppet；
The second format information of DCI is sent by least one terminal of interface circuit 1102 into multiple terminals to connect
The terminal for receiving the second format information is connect based on the corresponding DMRS sequence in the port of distribution and port or pseudo- orthogonal DMRS sequence
Receive the data that the base station is sent.
Optionally, the DMRS port includes port 7, port 8, port 11 and port 13.
The orthogonal DMRS sequence of the puppet is calculated according to the radio network temporary identifier of terminal.
The orthogonal DMRS sequence of the puppet is generated with specific reference to pseudo-random sequence initialization factor, and the processor 1101 is specific
For the pseudo-random sequence initialization factor to be calculated according to the following formula:
Wherein, cinitFor pseudo-random sequence initialization factor, nsIt is indexed for time slot,For cell identification code, nRNTIFor
The radio network temporary identifier of terminal；
The processor 1101 is specifically used for that pseudo- orthogonal DMRS sequence is calculated according to the following formula:
Wherein,For pseudo- orthogonal DMRS sequence, c is according to cinitThe pseudo-random sequence of generation, j are pseudo- orthogonal
The imaginary part of DMRS sequence, m are sequence index, and Indicate that physical down is total
Enjoy the physical block number of channel occupancy.
It should be noted that processor 1101 here can be a processor, it is also possible to multiple processing elements
It is referred to as.For example, the processor can be central processing unit (Central Processing Unit, abbreviation CPU), it is also possible to
Specific integrated circuit (Application Specific Integrated Circuit, abbreviation ASIC), or be arranged to
Implement one or more integrated circuits of the embodiment of the present invention, such as: one or more microprocessors (digital signal
Processor, abbreviation DSP), or, one or more field programmable gate array (Field Programmable Gate
Array, abbreviation FPGA).
Memory 1103 can be a storage device, be also possible to the general designation of multiple memory elements, and can for storing
It executes program code or base station runs required parameter, data etc..And memory 1103 may include random access memory (RAM),
It also may include nonvolatile memory (non-volatile memory), such as magnetic disk storage, flash memory (Flash) etc..
Bus 1104 can be industry standard architecture (Industry Standard Architecture, abbreviation
ISA) bus, external equipment interconnection (Peripheral Component, abbreviation PCI) bus or extended industry-standard architecture
(Extended Industry Standard Architecture, abbreviation EISA) bus etc..The bus 1104 can be divided into ground
Location bus, data/address bus, control bus etc..Only to be indicated with a thick line in Fig. 5, it is not intended that only one convenient for indicating
Root bus or a type of bus.
In addition, interface circuit 1102 can further be connect with the radio frequency part of base station, to be realized by the radio frequency part
Communication between terminal.
Fig. 7 is please referred to, is a kind of flow diagram of the first embodiment of information transferring method of the present invention, in the present embodiment
In, which comprises
S701, at least one terminal in multiple terminals receive the first format for the Downlink Control Information DCI that base station is sent
Information.
Wherein, the first format information of the DCI is by the base station based on the multiple terminals for needing to carry out data transmission
Quantity is determined that first format information includes scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark
Know SCID to be used to scramble antenna port, the demodulated reference signal DMRS corresponds to described in different antenna port and every two
DMRS sequence used in DMRS is mutually orthogonal.
S702, the first format information based on the DCI receive the data that the base station is sent.
If desired the terminal quantity carried out data transmission is less than or equal to four, first format based on the DCI
Information receives the data that the base station is sent, comprising:
Receive the first format information that the base station is sent；
The DMRS for including in first format information is obtained, determines the corresponding port the DMRS and DMRS sequence；
Channel estimation is carried out according to the corresponding port the DMRS and DMRS sequence and receives the number that the base station is sent
According to.
If desired the terminal quantity carried out data transmission be greater than four, then the method also includes:
Obtain base station distribution correspondence DMRS sequence and DMRS sequence SCID be zero port, according to the port of distribution with
And DMRS sequence carries out channel estimation and receives the data that the base station is sent；
Or
The second format information for the DCI that base station is sent is received, in the corresponding port information table of second format information of DCI
Reservation list item for carrying the orthogonal DMRS sequence of corresponding with terminal identity puppet, obtain base station distribution corresponds to the orthogonal DMRS of puppet
The port of sequence, the data sent according to base station described in the port of distribution and pseudo- orthogonal DMRS sequential reception.
Fig. 8 is please referred to, it is in the present embodiment, described for a kind of composition schematic diagram of the first embodiment of terminal of the present invention
Terminal includes:
First receiving unit 400, the first format information of the Downlink Control Information DCI for receiving base station transmission are described
The first format information of DCI by the base station based on needing the quantity of multiple terminals carried out data transmission to be determined, described the
One format information includes scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used for antenna
Port scrambling, the demodulated reference signal DMRS correspond to DMRS used in DMRS described in different antenna port and every two
Sequence is mutually orthogonal；
Second receiving unit 500 receives the data that the base station is sent for the first format information based on the DCI.
If desired the terminal quantity carried out data transmission is less than or equal to four, and first receiving unit 400 is specifically used
In:
Receive the first format information that the base station is sent；
The DMRS for including in first format information is obtained, determines the corresponding port the DMRS and DMRS sequence；
Second receiving unit 500 is specifically used for carrying out channel according to the corresponding port the DMRS and DMRS sequence
Estimate and receive the data that the base station is sent.
If desired the terminal quantity carried out data transmission is greater than four, then first receiving unit 400 is specifically used for:
The port that the SCID of the correspondence DMRS sequence and DMRS sequence that obtain base station distribution is zero；
Second receiving unit 500 is specifically used for carrying out channel estimation according to the port of distribution and DMRS sequence and connect
Receive the data that the base station is sent；
Or
First receiving unit 400 is used to receive the second format information of the DCI of base station transmission, second lattice of DCI
Reservation list item in the corresponding port information table of formula information is obtained for the orthogonal DMRS sequence of carrying puppet corresponding with terminal identity
The port of the corresponding pseudo- orthogonal DMRS sequence of base station distribution；
Second receiving unit 500 is used for the base station hair according to the port of distribution and pseudo- orthogonal DMRS sequential reception
The data sent.
Fig. 9 is please referred to, it is in the present embodiment, described for a kind of composition schematic diagram of the second embodiment of terminal of the present invention
Terminal includes:
Processor 2101, first interface circuit 2102, second interface circuit 2103, memory 2104 and bus 2105, institute
Processor 2101, first interface circuit 2102, second interface circuit 2103 and memory 2104 is stated to connect by the bus 2105
It connects and completes mutual communication, wherein store batch processing code in the memory 2104, the processor 2101 is used for
The program code stored in the memory 2104 is called, following operation is executed:
The first format information for the Downlink Control Information DCI that base station is sent is received by first interface circuit 2102, it is described
The first format information of DCI by the base station based on needing the quantity of multiple terminals carried out data transmission to be determined, described the
One format information includes scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used for antenna
Port scrambling, the demodulated reference signal DMRS correspond to DMRS used in DMRS described in different antenna port and every two
Sequence is mutually orthogonal；
The data that the base station is sent are received based on the first format information of the DCI by second interface circuit 2103.
If desired the terminal quantity carried out data transmission is less than or equal to four, and the processor 2101 is used for:
The first format information that the base station is sent is received by first interface circuit 2102；
The DMRS for including in first format information is obtained, determines the corresponding port the DMRS and DMRS sequence；
By second interface circuit 2103 according to the corresponding port the DMRS and DMRS sequence carry out channel estimation and
Receive the data that the base station is sent.
If desired the terminal quantity carried out data transmission is greater than four, then the processor 2101 is used for:
The SCID that correspondence DMRS sequence and DMRS sequence that base station is distributed are obtained by first interface circuit 2102 is zero
Port carries out channel estimation according to the port of distribution and DMRS sequence by second interface circuit 2103 and receives the base station
The data of transmission；
Or
The second format information for the DCI that base station is sent, second format information pair of DCI are received by first interface circuit
Reservation list item in the port information table answered obtains base station distribution for the orthogonal DMRS sequence of carrying puppet corresponding with terminal identity
Corresponding pseudo- orthogonal DMRS sequence port, by second interface circuit 2103 according to the port of distribution and pseudo- orthogonal DMRS sequence
Column receive the data that the base station is sent.
It should be noted that processor 1101 here can be a processor, it is also possible to multiple processing elements
It is referred to as.For example, the processor can be central processing unit (Central Processing Unit, abbreviation CPU), it is also possible to
Specific integrated circuit (Application Specific Integrated Circuit, abbreviation ASIC), or be arranged to
Implement one or more integrated circuits of the embodiment of the present invention, such as: one or more microprocessors (digital signal
Processor, abbreviation DSP), or, one or more field programmable gate array (Field Programmable Gate
Array, abbreviation FPGA).
Memory 1103 can be a storage device, be also possible to the general designation of multiple memory elements, and can for storing
It executes program code or base station runs required parameter, data etc..And memory 1103 may include random access memory (RAM),
It also may include nonvolatile memory (non-volatile memory), such as magnetic disk storage, flash memory (Flash) etc..
Bus 1104 can be industry standard architecture (Industry Standard Architecture, abbreviation
ISA) bus, external equipment interconnection (Peripheral Component, abbreviation PCI) bus or extended industry-standard architecture
(Extended Industry Standard Architecture, abbreviation EISA) bus etc..The bus 1104 can be divided into ground
Location bus, data/address bus, control bus etc..Only to be indicated with a thick line in Fig. 5, it is not intended that only one convenient for indicating
Root bus or a type of bus.
Fig. 9 is referred to, is the system architecture schematic diagram of present aspect base station of the present invention and terminal composition, in the embodiment of the present invention
In, which includes base station and at least one terminal.
Wherein, base station is used to determine in the multiple terminal based on the quantity for the multiple terminals for needing to carry out data transmission
At least one terminal Downlink Control Information DCI the first format information, first format information include scrambling mark
SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, the demodulation reference letter
It is mutually orthogonal that number DMRS corresponds to DMRS sequence used in DMRS described in different antenna port and every two；
At least one terminal into multiple terminals sends the first format information of DCI；
Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal,
So that at least one terminal in the multiple terminal receives what the base station was sent based on the first format information of the DCI
Data.
It specifically includes: setting the first format information of DCI, in port information table corresponding with first format information of DCI
In, removal scrambling mark SCID simultaneously configures preset list item for carrying DMRS wherein, in the DMRS comprising port numbers and
DMRS sequence；
If desired the terminal quantity carried out data transmission be less than or equal to four, then the base station be each terminal distribution not
Same port, and the SCID that DMRS sequence used in all of the port is arranged is zero.If desired the number of terminals carried out data transmission
Amount is greater than four, then the base station is the wherein mutually orthogonal port of four terminal distribution DMRS sequences, and is arranged described four
The SCID of DMRS sequence used in terminal is zero；
For other terminals except four terminals, the base station is other described terminal distribution ports；
Calculate the orthogonal DMRS sequence of puppet of each terminal in other described terminals；
The second format information of DCI is set, configures the reservation list item in the port information table for carrying and terminal identity
The orthogonal DMRS sequence of corresponding puppet；
At least one terminal into multiple terminals sends the second format information of DCI to receive the second format information
Port and port corresponding DMRS sequence of the terminal based on distribution or pseudo- orthogonal DMRS sequential reception described in base station send
Data.
Optionally, the DMRS port includes port 7, port 8, port 11 and port 13.
The orthogonal DMRS sequence of the puppet is calculated according to the radio network temporary identifier of terminal.
The orthogonal DMRS sequence of the puppet is generated with specific reference to pseudo-random sequence initialization factor, and the pseudo-random sequence is initial
Change the factor to be calculated according to the following formula:
Wherein, cinitFor pseudo-random sequence initialization factor, nsIt is indexed for time slot,For cell identification code, nRNTIFor
The radio network temporary identifier of terminal；
The orthogonal DMRS sequence of the puppet is calculated according to the following formula:
Wherein,For pseudo- orthogonal DMRS sequence, c is according to cinitThe pseudo-random sequence of generation, j are pseudo- orthogonal
The imaginary part of DMRS sequence, m are sequence index, and Indicate that physical down is total
Enjoy the physical block number of channel occupancy.
Terminal is used to receive the first format information of the Downlink Control Information DCI of base station transmission, the first format of the DCI
Quantity of the information by the base station based on multiple terminals that needs carry out data transmission is determined that first format information includes
Scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, the solution
Reference signal DMRS is adjusted to correspond to DMRS sequence used in DMRS described in different antenna port and every two mutually orthogonal；
The first format information based on the DCI receives the data that the base station is sent.
The DCI that base station is sent is received, DCI is decoded, obtains DCI content, obtain the DMRS port number of this terminal distribution, then
Channel estimation and data demodulation are completed using DMRS sequence.
If desired the terminal quantity carried out data transmission is less than or equal to four, then terminal is sent for receiving the base station
The first format information；
The DMRS for including in first format information is obtained, determines the corresponding port the DMRS and DMRS sequence；
Channel estimation is carried out according to the corresponding port the DMRS and DMRS sequence and receives the number that the base station is sent
According to.
If desired the terminal quantity carried out data transmission is greater than four, then terminal is used for:
Obtain base station distribution correspondence DMRS sequence and DMRS sequence SCID be zero port, according to the port of distribution with
And DMRS sequence carries out channel estimation and receives the data that the base station is sent；
Or
The second format information for the DCI that base station is sent is received, in the corresponding port information table of second format information of DCI
Reservation list item for carrying the orthogonal DMRS sequence of corresponding with terminal identity puppet, obtain base station distribution corresponds to the orthogonal DMRS of puppet
The port of sequence, the data sent according to base station described in the port of distribution and pseudo- orthogonal DMRS sequential reception.
By carrying DMRS in DCI format information, under the premise of no increase new DCI load, port is extended
Quantity.And since these ports have used mutually orthogonal DMRS sequence, between the channel estimation of different terminals not
There are interference, terminal can accurately obtain the channel estimation results of itself, meet the transmission demand under MU-MIMO scene, mention
The high utilization efficiency of frequency spectrum resource；And by carrying specific pseudo- orthogonal DMRS sequence in port information table, utilize its puppet
Orthogonality can further realize the expansion to port number, support the MIMO demand of more users, further improve frequency spectrum
The utilization efficiency of resource.
The steps in the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.
Unit in the terminal of that embodiment of the invention can be combined, divided and deleted according to actual needs.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, abbreviation RAM) etc..
Method, base station and the terminal for being provided for the embodiments of the invention a kind of information transmission above have carried out detailed Jie
It continues, used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is only
It is to be used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to this hair
Bright thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not manage
Solution is limitation of the present invention.
Claims (16)
1. a kind of method of information transmission characterized by comprising
Quantity of the base station based on the multiple terminals for needing to carry out data transmission, determines at least one terminal in the multiple terminal
Downlink Control Information DCI the first format information, first format information include scrambling mark SCID and demodulation reference letter
Number DMRS, wherein the scrambling mark SCID is used to scramble antenna port, and the demodulated reference signal DMRS corresponds to difference
Antenna port and every two described in DMRS sequence used in DMRS it is mutually orthogonal；
At least one terminal into multiple terminals sends the first format information of DCI；
Data are sent using at least one terminal of the corresponding antenna port of identified DMRS into the multiple terminal, so that
At least one terminal obtained in the multiple terminal receives the number that the base station is sent based on the first format information of the DCI
According to.
2. the method as described in claim 1, which is characterized in that multiple terminals that the base station is carried out data transmission based on needs
Quantity, determine the format information of the Downlink Control Information DCI of at least one terminal in the multiple terminal, comprising:
The first format information of DCI is arranged in base station, and in port information table corresponding with first format information of DCI, removal adds
It disturbs mark SCID and configures preset list item for carrying DMRS, wherein include port numbers and DMRS sequence in the DMRS；
If desired the terminal quantity carried out data transmission is less than or equal to four, then the base station is that each terminal distribution is different
Port, and the SCID that DMRS sequence used in all of the port is arranged is zero.
3. method according to claim 2, which is characterized in that the terminal quantity if desired carried out data transmission is greater than four,
Then the base station is the wherein mutually orthogonal port of four terminal distribution DMRS sequences, and is arranged used in four terminals
The SCID of DMRS sequence is zero；
For other terminals except four terminals, the base station is other described terminal distribution ports；
Calculate the orthogonal DMRS sequence of puppet of each terminal in other described terminals；
The second format information of DCI is set, and the reservation list item configured in the port information table is corresponding with terminal identity for carrying
The orthogonal DMRS sequence of puppet；
At least one terminal into multiple terminals sends the second format information of DCI to receive the end of the second format information
The number that end group base station described in the corresponding DMRS sequence in the port of distribution and port or pseudo- orthogonal DMRS sequential reception is sent
According to.
4. method as claimed in claim 3, which is characterized in that the orthogonal DMRS sequence of the puppet is faced according to the wireless network of terminal
When mark be calculated.
5. the method as claimed in claim 3 or 4, which is characterized in that the orthogonal DMRS sequence of the puppet is with specific reference to pseudorandom sequence
The row initialization factor generates, and the pseudo-random sequence initialization factor is calculated according to the following formula:
Wherein, cinitFor pseudo-random sequence initialization factor, nsIt is indexed for time slot,For cell identification code, nRNTIFor terminal
Radio network temporary identifier；
The orthogonal DMRS sequence of the puppet is calculated according to the following formula:
Wherein,For pseudo- orthogonal DMRS sequence, c is according to cinitThe pseudo-random sequence of generation, j are pseudo- orthogonal DMRS sequence
The imaginary part of column, m are sequence index, andIndicate Physical Downlink Shared Channel
The physical block number of occupancy.
6. a kind of base station characterized by comprising
Determination unit determines in the multiple terminal extremely for the quantity based on the multiple terminals for needing to carry out data transmission
The first format information of the Downlink Control Information DCI of a few terminal, first format information include scrambling mark SCID and
Demodulated reference signal DMRS, wherein the scrambling mark SCID is used to scramble antenna port, the demodulated reference signal DMRS
It is mutually orthogonal corresponding to DMRS sequence used in DMRS described in different antenna port and every two；
Transmission unit sends the first format information of DCI at least one terminal into multiple terminals；And really using institute
At least one terminal of the corresponding antenna port of fixed DMRS into the multiple terminal sends data, so that the multiple end
At least one terminal in end receives the data that the base station is sent based on the first format information of the DCI.
7. base station as claimed in claim 6, which is characterized in that the determination unit is specifically used for:
The first format information of DCI is set, in port information table corresponding with first format information of DCI, removal scrambling mark
Know SCID and configure preset list item for carrying DMRS, includes port numbers and DMRS sequence in the DMRS；
If desired the terminal quantity carried out data transmission is less than or equal to four, then the port different for each terminal distribution, and
The SCID that DMRS sequence used in all of the port is arranged is zero.
8. base station as claimed in claim 7, which is characterized in that the terminal quantity if desired carried out data transmission is greater than four,
Then the determination unit is used for as the wherein mutually orthogonal port of four terminal distribution DMRS sequences, and four terminals are arranged
The SCID of used DMRS sequence is zero；
For other terminals except four terminals, the determination unit is also used to as other described terminal distribution ports；
The base station further includes computing unit, and the puppet that the computing unit is used to calculate each terminal in other described terminals is orthogonal
DMRS sequence；
The determination unit is also used to be arranged the second format information of DCI, and the reservation list item configured in the port information table is used for
The orthogonal DMRS sequence of carrying puppet corresponding with terminal identity；
The transmission unit is also used at least one terminal into multiple terminals and sends the second format information of DCI to receive
To the second format information terminal based on the corresponding DMRS sequence in the port of distribution and port or pseudo- orthogonal DMRS sequential reception
The data that the transmission unit is sent.
9. base station as claimed in claim 8, which is characterized in that the orthogonal DMRS sequence of the puppet is faced according to the wireless network of terminal
When mark be calculated.
10. base station as claimed in claim 8 or 9, which is characterized in that the orthogonal DMRS sequence of the puppet is according at the beginning of pseudo-random sequence
The beginningization factor generates, the computing unit be specifically used for being calculated according to the following formula pseudo-random sequence initialization because
Son:
Wherein, cinitFor pseudo-random sequence initialization factor, nsIt is indexed for time slot,For cell identification code, nRNTIFor terminal
Radio network temporary identifier；
The computing unit is specifically used for that pseudo- orthogonal DMRS sequence is calculated according to the following formula:
Wherein,For pseudo- orthogonal DMRS sequence, c is according to cinitThe pseudo-random sequence of generation, j are pseudo- orthogonal DMRS sequence
The imaginary part of column, m are sequence index, andIndicate Physical Downlink Shared Channel
The physical block number of occupancy.
11. a kind of method of information transmission characterized by comprising
At least one terminal in multiple terminals receives the first format information for the Downlink Control Information DCI that base station is sent, described
The first format information of DCI by the base station based on needing the quantity of multiple terminals carried out data transmission to be determined, described the
One format information includes scrambling mark SCID and demodulated reference signal DMRS, wherein the scrambling mark SCID is used for antenna
Port scrambling, the demodulated reference signal DMRS correspond to DMRS used in DMRS described in different antenna port and every two
Sequence is mutually orthogonal；
The first format information based on the DCI receives the data that the base station is sent.
12. method as claimed in claim 11, which is characterized in that the terminal quantity if desired carried out data transmission is less than or waits
In four, first format information based on the DCI receives the data that the base station is sent, comprising:
Receive the first format information that the base station is sent；
The DMRS for including in first format information is obtained, determines the corresponding port the DMRS and DMRS sequence；
Channel estimation is carried out according to the corresponding port the DMRS and DMRS sequence and receives the data that the base station is sent.
13. method as claimed in claim 11, which is characterized in that the terminal quantity if desired carried out data transmission is greater than four
It is a, then the method also includes:
The port that the SCID of the correspondence DMRS sequence and DMRS sequence that obtain base station distribution is zero, according to the port of distribution and
DMRS sequence carries out channel estimation and receives the data that the base station is sent；
Or
Receive the second format information for the DCI that base station is sent, the guarantor in the corresponding port information table of second format information of DCI
Stay list item for carry the orthogonal DMRS sequence of corresponding with terminal identity puppet, obtain that base station distributes corresponds to the orthogonal DMRS sequence of puppet
Port, the data sent according to base station described in the port of distribution and pseudo- orthogonal DMRS sequential reception.
14. a kind of terminal characterized by comprising
First receiving unit, the first format information of the Downlink Control Information DCI for receiving base station transmission, the of the DCI
One format information by the base station based on needing the quantity of the multiple terminals carried out data transmission to be determined, believe by first format
Breath includes scrambling mark SCID and demodulated reference signal DMRS, wherein and the scrambling mark SCID is used to scramble antenna port,
It is mutual that the demodulated reference signal DMRS corresponds to DMRS sequence used in DMRS described in different antenna port and every two
It is orthogonal；
Second receiving unit receives the data that the base station is sent for the first format information based on the DCI.
15. terminal as claimed in claim 14, which is characterized in that the terminal quantity if desired carried out data transmission is less than or waits
In four, first receiving unit is specifically used for:
Receive the first format information that the base station is sent；
The DMRS for including in first format information is obtained, determines the corresponding port the DMRS and DMRS sequence；
Second receiving unit be specifically used for being carried out according to the corresponding port the DMRS and DMRS sequence channel estimation and
Receive the data that the base station is sent.
16. terminal as claimed in claim 14, which is characterized in that the terminal quantity if desired carried out data transmission is greater than four
A, then first receiving unit is specifically used for:
The port that the SCID of the correspondence DMRS sequence and DMRS sequence that obtain base station distribution is zero；
Second receiving unit is specifically used for according to the port of distribution and DMRS sequence carry out channel estimation and receive
The data that base station is sent；
Or
First receiving unit is used to receive the second format information of the DCI of base station transmission, second format information pair of DCI
Reservation list item in the port information table answered obtains base station distribution for the orthogonal DMRS sequence of carrying puppet corresponding with terminal identity
Corresponding pseudo- orthogonal DMRS sequence port；
Second receiving unit is used for the number that the base station according to the port of distribution and pseudo- orthogonal DMRS sequential reception is sent
According to.
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|---|---|---|---|---|
| CN112615658B (en) | 2016-07-25 | 2022-06-21 | 上海朗帛通信技术有限公司 | Method and device in wireless transmission |
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