CN106788930A - The transmission of demodulated reference signal, method of reseptance and base station, user equipment in sTTI - Google Patents
The transmission of demodulated reference signal, method of reseptance and base station, user equipment in sTTI Download PDFInfo
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- CN106788930A CN106788930A CN201610876588.6A CN201610876588A CN106788930A CN 106788930 A CN106788930 A CN 106788930A CN 201610876588 A CN201610876588 A CN 201610876588A CN 106788930 A CN106788930 A CN 106788930A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H04L27/2611—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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Abstract
The transmission of demodulated reference signal, method of reseptance, base station and user equipment in sTTI, methods described include：Obtain the information of the resource in sTTI shared by non-CRS；Use the demodulated reference signal of the resource transmission user equipment shared by non-CRS in the sTTI.Above-mentioned scheme, can transmit the DRS (Dedicated Reference Signal) of user equipment when using sTTI.
Description
Technical field
Transmission, reception the present invention relates to demodulated reference signal in wireless communication technology field, more particularly to a kind of sTTI
Method, base station and user equipment.
Background technology
With the development of the communication technology, in increasing application field, such as game on line, virtual reality, industry inspection
The fields such as survey, car networking, the requirement more and more higher to communication delay, user expects that the end-to-end time delay of communication is shorter and shorter.
At present, third generation cooperative partner program (The 3rdGeneration Partnership Project, 3GPP)
Through starting to the short transmission time interval (shortened based on Long Term Evolution (Long Term Evolution, LTE)
Transmission Time Interval, sTTI) transmission technology studied and standardized, main study subject is frequency division
The length that duplexing (Frequency Division Duplexing, FDD) is supported is 2/4/7 sTTI of symbol lengths, with
And the length that time division duplex (Time Division Duplexing, TDD) is supported is 7 sTTI of symbol.
In the prior art, the DRS (Dedicated Reference Signal) (UE-specific of downlink dedicated reference signal, i.e. user equipment
Reference signal) transmitted in most latter two symbol in a time slot of normal sub-frames.It is descending when being carried out using sTTI
During data transfer, it is impossible to transmit the DRS (Dedicated Reference Signal) of user equipment, the transmission quality of downlink data is have impact on.
The content of the invention
The problem that the present invention is solved is the DRS (Dedicated Reference Signal) that user equipment how is transmitted when using sTTI.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of transmission method of demodulated reference signal in sTTI,
Including：Obtain the information of the resource in sTTI shared by non-CRS；Used using the resource transmission shared by non-CRS in the sTTI
The demodulated reference signal of family equipment.
Alternatively, the demodulated reference signal of the resource transmission user equipment using shared by non-CRS in the sTTI,
Including：Corresponding demodulated reference signal is transmitted using the OFDM symbol shared by non-CRS in the sTTI.
Alternatively, the OFDM symbol using shared by non-CRS in the sTTI transmits corresponding demodulated reference signal,
Including：When first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS, first OFDM in sTTI is used
The corresponding demodulated reference signal of symbol transmission.
Alternatively, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each sTTI includes two
During OFDM symbol, the OFDM symbol using shared by non-CRS in the sTTI transmits corresponding demodulated reference signal, bag
Include：Corresponding demodulated reference signal is transmitted using first OFDM symbol in second sTTI and the 7th sTTI；Use
OFDM symbol in three sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI shared by non-CRS transmits corresponding solution
Adjust reference signal.
Alternatively, the shared t easet ofasubcarriers in each PRB of the demodulated reference signal be t easet ofasubcarriers 0,1,
4th, the subset of subcarrier shared by non-CRS in 5,6,7,10,11 }.
Alternatively, the shared t easet ofasubcarriers in each PRB of the demodulated reference signal { 0,1,6,7 } or 4,5,
10、11}。
Alternatively, the demodulated reference signal of the resource transmission user equipment using shared by non-CRS in the sTTI,
Including：Based on cell identity information, the information of the shared subcarriers in each PRB of CRS is determined；Using first in sTTI
Subcarrier in OFDM symbol and each PRB shared by non-CRS transmits corresponding demodulated reference signal.
Alternatively, the subcarrier transmission in the use sTTI in first OFDM symbol and each PRB shared by non-CRS
Corresponding demodulated reference signal, including：When the t easet ofasubcarriers shared by non-CRS in PRB be t easet ofasubcarriers 0,1,4,5,6,
7th, subset 10,11 }, and the corresponding number of subcarriers of the subset is more than or equal to the son load that transmission demodulated reference signal needs
During the quantity of ripple, the t easet ofasubcarriers that the subcarrier of respective amount in described subset is constituted are believed as transmission demodulation reference
Number t easet ofasubcarriers；The quantity of the corresponding subcarrier of subset described in PRB needs less than transmission demodulated reference signal
Subcarrier quantity when, the subcarrier that respective numbers are chosen from the t easet ofasubcarriers { 2,3,8,9 } adds the subset, as
Transmit the t easet ofasubcarriers of demodulated reference signal.
Alternatively, when the corresponding number of subcarriers of the subset is equal to the number of the subcarrier that transmission demodulated reference signal needs
During amount, the subset is { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, the subcarrier transmission in the use sTTI in first OFDM symbol and each PRB shared by non-CRS
Corresponding demodulated reference signal, including：When the t easet ofasubcarriers shared by non-CRS in PRB include { 0,1,6,7 } and 4,5,10,
11 } at least one when, transmit corresponding demodulation reference using the t easet ofasubcarriers { 0,1,6,7 } in PRB or { 4,5,10,11 } and believe
Number.
Alternatively, the subcarrier for choosing respective numbers from t easet ofasubcarriers { 2,3,8,9 } adds the subset, as
The t easet ofasubcarriers of demodulated reference signal are transmitted, including：Choose respective numbers from the t easet ofasubcarriers { 2,3,8,9 }, and with institute
State the neighbouring subcarrier of the subcarrier in subset and add the subset, as the t easet ofasubcarriers of transmission demodulated reference signal.
Alternatively, the quantity of the described corresponding subcarrier of subset when in PRB is less than transmission demodulated reference signal
During the quantity of the subcarrier of needs, the subcarrier that respective numbers are chosen from t easet ofasubcarriers { 2,3,8,9 } adds the subset,
As the t easet ofasubcarriers of transmission demodulated reference signal, including：When the subcarrier shared by CRS in PRB includes t easet ofasubcarriers
During any two subcarrier in { 0,1,6,7 } or { 4,5,10,11 }, using t easet ofasubcarriers { 0,1,2,6,7,8 } or 3,4,
5th, the subcarrier in 9,10,11 } shared by non-CRS transmits corresponding demodulated reference signal.
The embodiment of the present invention additionally provides a kind of method of reseptance of demodulated reference signal in sTTI, and methods described includes：Really
Determine the information of the resource in sTTI shared by demodulated reference signal；Wherein, the resource shared by the demodulated reference signal is non-
Resource shared by CRS；Receive what base station was transmitted at the corresponding position of resource in the sTTI shared by demodulated reference signal
Demodulated reference signal.
Alternatively, the resource shared by the demodulated reference signal is the OFDM symbol shared by non-CRS in the sTTI.
Alternatively, when first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS, the demodulation reference
Resource shared by signal is first OFDM symbol in sTTI.
Alternatively, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each sTTI includes two
During OFDM symbol, the OFDM symbol shared by the demodulated reference signal, including：In second sTTI and the 7th sTTI
One OFDM symbol；OFDM in 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI shared by non-CRS
Symbol.
Alternatively, the resource shared by the demodulated reference signal includes：Shared t easet ofasubcarriers are in each PRB
The subset of subcarrier shared by non-CRS in t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }.
Alternatively, the t easet ofasubcarriers that the subcarrier shared by the demodulated reference signal is constituted, including in each PRB
T easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, the resource shared by the demodulated reference signal includes：First OFDM symbol and each PRB in sTTI
Subcarrier shared by interior non-CRS.
Alternatively, when the t easet ofasubcarriers shared by non-CRS in PRB are t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }
Subset, and the corresponding number of subcarriers of the subset more than or equal to transmission demodulated reference signal need subcarrier quantity
When, the resource shared by the demodulated reference signal includes the subcarrier of respective amount in the subset；Described in PRB
When the quantity of the corresponding subcarrier of subset is less than the quantity for transmitting the subcarrier that demodulated reference signal needs, the demodulation reference letter
Resource shared by number includes that the subcarrier that respective numbers are chosen from t easet ofasubcarriers { 2,3,8,9 } adds the subset to constitute
T easet ofasubcarriers in subcarrier.
Alternatively, when the corresponding number of subcarriers of the subset is equal to the number of the subcarrier that transmission demodulated reference signal needs
During amount, the subset is { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, when the corresponding number of subcarriers of the subset is equal to the number of the subcarrier that transmission demodulated reference signal needs
During amount, the resource shared by the demodulated reference signal includes the subcarrier in subset { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, the quantity of the corresponding subcarrier of subset described in PRB needs less than transmission demodulated reference signal
Subcarrier quantity when, the resource shared by the demodulated reference signal includes, from t easet ofasubcarriers { 2,3,8,9 } choose phase
Answer the subcarrier in the t easet ofasubcarriers that the subcarrier of quantity adds the subset to constitute.
Alternatively, in the subcarrier shared by CRS in PRB includes t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }
Any two subcarrier when, resource shared by demodulated reference signal include the t easet ofasubcarriers { 0,1,2,6,7,8 } or
Subcarrier in { 3,4,5,9,10,11 } shared by non-CRS is the resource shared by the demodulated reference signal.
The embodiment of the present invention additionally provides a kind of base station, and the base station includes：Acquiring unit, is suitable to obtain non-in sTTI
The information of the resource shared by CRS；Transmission unit, is adapted in use in the sTTI resource transmission user shared by non-CRS to set
Standby demodulated reference signal.
Alternatively, the transmission unit, is adapted in use in the sTTI OFDM symbol shared by non-CRS to transmit corresponding
Demodulated reference signal.
Alternatively, the transmission unit, is suitable to when first OFDM symbol in sTTI is the OFDM symbols shared by non-CRS
Number when, use first OFDM symbol in sTTI to transmit corresponding demodulated reference signal.
Alternatively, the transmission unit, it is configuration routine CP and including 14 subframes of OFDM symbol to be suitable to when subframe, and
When each sTTI includes two OFDM symbols, the OFDM symbol using shared by non-CRS in the sTTI is transmitted corresponding
Demodulated reference signal, transmits corresponding demodulation reference and believes using first OFDM symbol in second sTTI and the 7th sTTI
Number；Passed using the OFDM symbol shared by non-CRS in the 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI
Defeated corresponding demodulated reference signal.
Alternatively, the shared t easet ofasubcarriers in each PRB of the demodulated reference signal be t easet ofasubcarriers 0,1,
4th, the subset of subcarrier shared by non-CRS in 5,6,7,10,11 }.
Alternatively, the shared t easet ofasubcarriers in each PRB of the demodulated reference signal { 0,1,6,7 } or 4,5,
10、11}。
Alternatively,.....It is suitable to, based on cell identity information, determine the letter of the shared subcarriers in each PRB of CRS
Breath；Corresponding demodulation reference is transmitted using the subcarrier shared by non-CRS in first OFDM symbol in sTTI and each PRB to believe
Number.
Alternatively, the transmission unit, be suitable to the t easet ofasubcarriers in the PRB shared by non-CRS for t easet ofasubcarriers 0,
1st, subset 4,5,6,7,10,11 }, and the corresponding number of subcarriers of the subset need to more than or equal to transmission demodulated reference signal
During the quantity of the subcarrier wanted, the t easet ofasubcarriers that the subcarrier of respective amount in described subset is constituted are solved as transmission
Adjust the t easet ofasubcarriers of reference signal；The quantity of the corresponding subcarrier of subset described in PRB is less than transmission demodulation reference
During the quantity of the subcarrier of signal demand, the subcarrier addition that respective numbers are chosen from t easet ofasubcarriers { 2,3,8,9 } is described
Subset, as the t easet ofasubcarriers of transmission demodulated reference signal.
Alternatively, when the corresponding number of subcarriers of the subset is equal to the number of the subcarrier that transmission demodulated reference signal needs
During amount, the subset is { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, the transmission unit, be suitable to the t easet ofasubcarriers in the PRB shared by non-CRS include { 0,1,6,7 } and
During { 4,5,10,11 } at least one, corresponding solution is transmitted using the t easet ofasubcarriers { 0,1,6,7 } in PRB or { 4,5,10,11 }
Adjust reference signal.
Alternatively, the transmission unit, is suitable to choose respective numbers from the t easet ofasubcarriers { 2,3,8,9 }, and with it is described
The neighbouring subcarrier of subcarrier in subset adds the subset, used as the t easet ofasubcarriers of transmission demodulated reference signal.
Alternatively, the transmission unit, be suitable to the subcarrier in the PRB shared by CRS include t easet ofasubcarriers 0,1,6,
During any two subcarrier 7 } or in { 4,5,10,11 }, using t easet ofasubcarriers { 0,1,2,6,7,8 } or 3,4,5,9,10,
11 } subcarrier in shared by non-CRS transmits corresponding demodulated reference signal.
The embodiment of the present invention additionally provides a kind of user equipment, and the user equipment includes：Determine demodulation reference in sTTI
The information of the resource shared by signal；Wherein, the resource shared by the demodulated reference signal is the resource shared by non-CRS；
The demodulated reference signal that base station is transmitted is received at the corresponding position of resource in the sTTI shared by demodulated reference signal.
Alternatively, the resource shared by the demodulated reference signal is the OFDM symbol shared by non-CRS in the sTTI.
Alternatively, when first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS, the demodulation reference
Resource shared by signal is first OFDM symbol in sTTI.
Alternatively, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each sTTI includes two
During OFDM symbol, the OFDM symbol shared by the demodulated reference signal, including：In second sTTI and the 7th sTTI
One OFDM symbol；OFDM in 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI shared by non-CRS
Symbol.
Alternatively, the resource shared by the demodulated reference signal includes：Shared t easet ofasubcarriers are in each PRB
The subset of subcarrier shared by non-CRS in t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }.
Alternatively, the t easet ofasubcarriers that the subcarrier shared by the demodulated reference signal is constituted, including in each PRB
T easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, the resource shared by the demodulated reference signal includes：First OFDM symbol and each PRB in sTTI
Subcarrier shared by interior non-CRS.
Alternatively, when the t easet ofasubcarriers shared by non-CRS in PRB are t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }
Subset, and the corresponding number of subcarriers of the subset more than or equal to transmission demodulated reference signal need subcarrier quantity
When, the resource shared by the demodulated reference signal includes the subcarrier of respective amount in the subset；Described in PRB
When the quantity of the corresponding subcarrier of subset is less than the quantity for transmitting the subcarrier that demodulated reference signal needs, the demodulation reference letter
Resource shared by number includes that the subcarrier that respective numbers are chosen from t easet ofasubcarriers { 2,3,8,9 } adds the subset to constitute
T easet ofasubcarriers in subcarrier.
Alternatively, when the corresponding number of subcarriers of the subset is equal to the number of the subcarrier that transmission demodulated reference signal needs
During amount, the subset is { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, when the corresponding number of subcarriers of the subset is equal to the number of the subcarrier that transmission demodulated reference signal needs
During amount, the resource shared by the demodulated reference signal includes the subcarrier in subset { 0,1,6,7 } or { 4,5,10,11 }.
Alternatively, the quantity of the corresponding subcarrier of subset described in PRB needs less than transmission demodulated reference signal
Subcarrier quantity when, the resource shared by the demodulated reference signal includes, from t easet ofasubcarriers { 2,3,8,9 } choose phase
Answer the subcarrier in the t easet ofasubcarriers that the subcarrier of quantity adds the subset to constitute.
Alternatively, in the subcarrier shared by CRS in PRB includes t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }
Any two subcarrier when, resource shared by demodulated reference signal include the t easet ofasubcarriers { 0,1,2,6,7,8 } or
Subcarrier in { 3,4,5,9,10,11 } shared by non-CRS is the resource shared by the demodulated reference signal.
Compared with prior art, the technical scheme of the embodiment of the present invention has the advantages that：
Above-mentioned scheme, when downlink data transmission is carried out using sTTI, by using shared by non-CRS in the sTTI
Resource transmission user equipment demodulated reference signal, it is possible to achieve the descending biography of corresponding descending UE grades of DRS (Dedicated Reference Signal)
It is defeated, and conflicting between resource that UE grades of descending DRS (Dedicated Reference Signal) used and the resource shared by CRS is avoided, under raising
The quality of row data transfer.
Further, when first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS, using in sTTI
First OFDM symbol transmit corresponding demodulated reference signal, can cause that user equipment rapidly receives demodulation reference and believes
Number (De-Modulation Reference Signal, demodulated reference signal) and channel estimation is carried out, thus number can be improved
According to the speed of transmission.
Further, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each sTTI includes two
During individual OFDM symbol, the shared t easet ofasubcarriers in each PRB of demodulated reference signal symbol be { 0,1,6,7 } or 4,5,
10th, 11 }, it is possible to reduce demodulated reference signal conflicts with the resource shared by CSI-RS, the efficiency of resource distribution is improved.
Further, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each sTTI two
OFDM symbol, the subcarrier in using first OFDM symbol in sTTI and each PRB shared by non-CRS transmits corresponding solution
When adjusting reference signal, when the t easet ofasubcarriers shared by non-CRS in PRB include { 0,1,6,7 } and { 4,5,10,11 } at least one
When, transmit corresponding demodulated reference signal using the t easet ofasubcarriers { 0,1,6,7 } in PRB or { 4,5,10,11 }；When in PRB
When subcarrier shared by CRS includes any two subcarrier in t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }, make
Corresponding demodulation is transmitted with the subcarrier shared by non-CRS in t easet ofasubcarriers { 0,1,2,6,7,8 } or { 3,4,5,9,10,11 }
Reference signal, it is possible to reduce demodulated reference signal conflicts with the resource shared by CSI-RS, improves the efficiency of resource distribution.
Brief description of the drawings
Fig. 1 is the flow chart of the transmission method of demodulated reference signal in a kind of sTTI in the embodiment of the present invention；
Fig. 2 is the flow chart of the transmission method of demodulated reference signal in another sTTI in the embodiment of the present invention；
Fig. 3 is the schematic diagram of the example of the transmission method of demodulated reference signal in sTTI shown in application drawing 2；
Fig. 4 is the position view of the RE that existing CSI-RS takes；
Fig. 5 is the flow chart of the transmission method of demodulated reference signal in another sTTI in the embodiment of the present invention；
Fig. 6 to Fig. 8 transmission methods of demodulated reference signal in the sTTI when different CRS offsets shown in application drawing 5
The schematic diagram of example；
Fig. 9 is a kind of structural representation of the base station in the embodiment of the present invention；
Figure 10 is a kind of structural representation of the user equipment in the embodiment of the present invention.
Specific embodiment
As background technology is sayed, in the prior art, when using sTTI carry out downlink data transmission when, and sTTI by one when
When symbol before gap is constituted, due to lacking corresponding demodulated reference signal (DMRS) transmission plan so that user equipment without
Method carries out channel estimation etc., have impact on the transmission quality of downlink data.
Technical scheme in the embodiment of the present invention when downlink data transmission is carried out using sTTI, by using the sTTI
The demodulated reference signal of the resource transmission user equipment shared by interior non-CRS, it is possible to achieve corresponding descending UE grades of special ginseng
Examine the downlink transfer of signal, and avoid resource and the resource shared by CRS that UE grades of descending DRS (Dedicated Reference Signal) used it
Between conflict, improve downlink data transmission quality.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
The flow chart of the transmission method of demodulated reference signal in a kind of sTTI that Fig. 1 shows in the embodiment of the present invention.Ginseng
See Fig. 1, the transmission method of demodulated reference signal can include the steps in the sTTI in the embodiment of the present invention：
Step S101：Obtain the information of the resource in sTTI shared by non-CRS.
In specific implementation, in order to avoid with existing cell specific reference signal (Cell Reference Signal,
CRS the resource that) is used produces conflict, base station can first by obtaining the information of the resource in sTTI shared by CRS, and then
The information of the resource in sTTI shared by non-CRS can be determined.
Step S102：Use the demodulated reference signal of the resource transmission user equipment shared by non-CRS in the sTTI.
In specific implementation, base station it is determined that resource in sTTI shared by non-CRS information when, can be with non-in sTTI
The DMRS of the resource transmission user equipment shared by CRS, to avoid between the resource shared by the resource and CRS shared by DMRS
Conflict.
Above-mentioned scheme, when downlink data transmission is carried out using sTTI, by using shared by non-CRS in the sTTI
Resource transmission user equipment demodulated reference signal, it is possible to achieve the downlink transfer of the demodulated reference signal of user equipment, and
Conflicting between the resource that the demodulated reference signal of user equipment is used and the resource shared by CRS is avoided, communication system is improved
The compatibility of system, improves the transmission quality of downlink data.
Below in conjunction with the transmission method of demodulated reference signal in the sTTI in the specific embodiment embodiment of the present invention
It is further described in detail.
In an embodiment of the present invention, can be from OFDM (Orthogonal Frequency Division
Multiplexing OFDM) symbol aspect, it is to avoid the resource used between DMRS and CRS in sTTI is produced and conflicted, namely
Remaining OFDM symbol outside OFDM symbol of the OFDM symbol used during transmission DMRS shared by CRS in sTTI.
Referring to Fig. 2, the transmission method of demodulated reference signal in a kind of sTTI in the embodiment of the present invention is suitable to base station and is adopting
When carrying out downlink data transmission with sTTI, to the corresponding DMRS of user device transmissions, can specifically be realized using the steps：
Step S201：Obtain the information of the OFDM symbol in sTTI shared by non-CRS.
In specific implementation, in order to avoid the OFDM symbol shared by the OFDM symbol shared by DMRS in sTTI and CRS
Between conflict, base station can first determine that CRS is in shared OFDM symbol in sTTI, and then can determine non-in sTTI
The information of the OFDM symbol shared by CRS.
Step S202：Corresponding DMRS symbols are transmitted using the OFDM symbol shared by non-CRS in the sTTI.
In specific implementation, base station is it is determined that during OFDM symbol shared by non-CRS in sTTI, it is possible to use non-in sTTI
OFDM symbol shared by CRS transmits corresponding DMRS symbols, with the OFDM symbol and DMRS that avoid CRS shared in sTTI
Conflict between shared DMRS symbols.
14 subframes of OFDM symbol will be included to configure routine CP below, each two OFDM symbol is as a sTTI
Example, the transmission method to demodulated reference signal in the sTTI shown in Fig. 2 is introduced.
Referring to Fig. 3, for first shortening Transmission Time Interval sTTI0, two OFDM symbols in it are used to conduct
The controlling symbols of physical downlink control channel PDCCH, in order to avoid resource contention, first is shortened Transmission Time Interval sTTI0
Two interior OFDM symbols are not used in transmission DMRS.
Shorten Transmission Time Interval sTTI1 and the 7th shortening Transmission Time Interval sTTI6 for second, because of second
Shorten two OFDM symbols in Transmission Time Interval sTTI1 and the 7th two shortened in Transmission Time Interval sTTI6
OFDM symbol be non-CRS where symbol, thus can using second shorten in Transmission Time Interval sTTI1 it is any one
Individual OFDM symbol and the 7th any one OFDM symbol shortened in Transmission Time Interval sTTI6 transmit corresponding DMRS respectively
Symbol.In an embodiment of the present invention, in order to further improve the speed of data transfer, when can shorten transmission using second
Between be spaced first OFDM symbol in sTTI1 and the 7th is shortened first OFDM symbol point in Transmission Time Interval sTTI6
The defeated corresponding DMRS symbols of supplementary biography, by first OFDM symbol being placed on DMRS symbols in sTTI1, can cause that user sets
It is standby to receive DMRS as soon as possible and carry out channel estimation, so that accelerate the channel estimation of whole sTTI, demodulating process, such that it is able to
Improve the transmission speed of downlink data.
Shorten Transmission Time Interval sTT2 and the 5th shortening Transmission Time Interval sTT4 for the 3rd, in both
First OFDM symbol is taken by CRS, thus can be transmitted using second OFDM symbol in itself respectively corresponding
DMRS symbols.
Shorten Transmission Time Interval sTT3 and the 6th shortening Transmission Time Interval sTT5 for the 4th, in both
Second OFDM symbol is taken by CRS, thus can transmit corresponding DMRS using first OFDM symbol in itself respectively
Symbol.
In specific implementation, DMRS can be using with the reference signal (RS) of existing user equipment equally on 4 RE
CDMA (Code Division Multiple Access, CDMA) mechanism, to support multiple antenna ports, most 4 numbers of plies
According to transmission, i.e. each antenna port distributes the orthogonal code that length is 4.Wherein, orthogonal code and resource element (RE) it
Between corresponding relation can be according to subcarrier number order from small to large correspondence, or according to subcarrier number from big to small suitable
Ordered pair also should may be used.
In specific implementation, when corresponding DMRS symbols are transmitted using the OFDM symbol shared by non-CRS in sTTI, can
With by reducing conflicting between DMRS symbols and the subcarrier shared by CSI-RS in PRB, to reduce DMRS for existing
The influence of CSI-RS configurations, so as to reduce the complexity of resource distribution, improves the efficiency of resource distribution.
Referring to Fig. 3 and Fig. 4, in order to reduce the resource in PRB shared by DMRS symbols with channel condition information reference in PRB
The conflict of the resource shared by signal (Channel State Information-Reference Signals, CSI-RS),
In one embodiment of the invention, the t easet ofasubcarriers shared by DMRS are { 4,5,10,11 }.
When the t easet ofasubcarriers shared by DMRS are { 4,5,10,11 } so that the resource shared by DMRS symbols is in son
The the 6th and the 7th OFDM symbol in frame, and the 12nd and the 13rd OFDM symbol will not be with existing CSI-RS's
Resource produces conflict, and is only the resource contention for having part in symbol the tenth and the 11st OFDM symbol.
In an alternative embodiment of the invention, for the t easet ofasubcarriers shared by DMRS for { 0,1,6,7 } situation with
T easet ofasubcarriers shared by DMRS are similar to for { 4,5,10,11 }, repeat no more.
From the above description it can be seen that when the t easet ofasubcarriers shared by DMRS are { 0,1,6,7 } or { 4,5,10,11 }
When, it is possible to reduce 4 single ports or two-port, the CSI-RS of 24 ports are configured or 1 CSI-RS configuration of 8 ports, from
And the influence that DMRS is configured to CSI-RS can be to the full extent reduced, such that it is able to reduce the complexity of resource distribution, carry
The efficiency of resource distribution high.
In specific implementation, in order to further improve the speed of data transfer, first symbol in sTTI can be used
In DMRS, and then start with from subcarrier aspect, it is to avoid produced with the resource shared by CRS in existing use sTTI and conflicted.
The transmission method of DMRS, can include following step in another sTTI that Fig. 5 shows in the embodiment of the present invention
Suddenly：
Step S501：Based on cell identity information, the information of the shared subcarriers in each PRB of CRS is determined.
In specific implementation, base station can determine the shared sons in each PRB of CRS by cell ID Cell-ID
The information of carrier wave, then by the information of identified CRS shared in each PRB subcarrier, just can determine in also PRB
The information of the subcarrier shared by non-CRS.
Step S502：It is right using the subcarrier transmission shared by non-CRS in first OFDM symbol in sTTI and each PRB
The DMRS symbols answered.
In specific implementation, in order to user equipment can as soon as possible carry out channel estimation, accelerate data demodulation, the stream of decoding
Journey, so that the speed of downlink data transmission is improved, can be using non-CRS institutes in first OFDM symbol in sTTI and each PRB
The subcarrier of occupancy transmits corresponding DMRS, by what the subcarrier shared by the subcarrier shared by DMRS and CRS staggered
Mode, can avoid conflicting between the resource shared by DMRS and the resource shared by existing CRS.
In specific implementation, DMRS can be using with the reference signal (RS) of existing user equipment equally on 4 RE
CDMA (Code Division Multiple Access, CDMA) mechanism, to support multiple antenna ports, most four layers
The transmission of data, i.e. each antenna port one length of distribution are 4 orthogonal code.Wherein, orthogonal code and resource element (RE)
Between corresponding relation can be according to subcarrier number order from small to large correspondence, or according to subcarrier number from big to small
Order correspondence.
It is same configure routine CP and comprising 14 subframes of OFDM symbol, each sTTI including as a example by 2 OFDM symbols,
DMRS transmission methods in sTTI shown in Fig. 5 are introduced.
When the t easet ofasubcarriers shared by non-CRS in PRB include { 0,1,6,7 } and { 4,5,10,11 } at least one, then
Can respectively be made using the t easet ofasubcarriers { 0,1,6,7 } or corresponding 4 RE of { 4,5,10,11 } corresponding subcarrier in PRB
It is corresponding 4 RE of DMRS.
It is any in the subcarrier shared by CRS in PRB includes t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }
During two subcarriers, carried using the son shared by non-CRS in t easet ofasubcarriers { 0,1,2,6,7,8 } or { 3,4,5,9,10,11 }
Ripple transmits corresponding DMRS symbols.
Using the configuration mode of the pattern of above-mentioned DMRS character positions, can not only avoid shared by CRS and DMRS
The conflict of resource, and 4 single ports or two-port, the CSI-RS configurations of 24 ports or 18 port can be reduced
CSI-RS is configured, and such that it is able to reduce the influence that DMRS is configured to CSI-RS to the full extent, is matched somebody with somebody such that it is able to reduce resource
The complexity put, improves the efficiency of resource distribution.
Fig. 6 to Fig. 8 shows that CRS is 4 ports and sub-frame configuration routine CP, in the case that different CRS offsets, according to upper
The schematic diagram of the DMRS pilot tone patterns that the mode stated is obtained.
Referring to Fig. 6, when CRS skews are 0, because the t easet ofasubcarriers shared by CRS in PRB are { 0,3,6,9 }, namely
T easet ofasubcarriers shared by CRS do not include t easet ofasubcarriers { 4,5,10,11 }.Therefore, it is possible to using t easet ofasubcarriers 4,5,
10th, corresponding DMRS symbols 11 } are transmitted.
Referring to Fig. 7, when CRS skews are 1, because the t easet ofasubcarriers shared by CRS in PRB are { 1,4,7,10 },
That is the subcarrier shared by CRS includes that any two in t easet ofasubcarriers { 0,1,6,7 } and { 4,5,10,11 } is carried respectively
Ripple.Therefore, it is possible to use the subcarrier transmission in { 0,1,2,6,7,8 } or { 3,4,5,9,10,11 } shared by non-CRS corresponding
The corresponding DMRS symbols of DMRS symbol transmissions, namely t easet ofasubcarriers { 0,2,6,8 } or { 3,5,9,11 } can be used.
Accorded with transmitting corresponding DMRS using the subcarrier shared by non-CRS in t easet ofasubcarriers { 3,4,5,9,10,11 }
As a example by number corresponding DMRS symbols of transmission, specifically, shorten for second Transmission Time Interval sTTI1, the 4th shorten and pass
Defeated time interval sTTI3, Transmission Time Interval sTTI5 and the 7th shortening Transmission Time Interval sTTI6 of the 6th shortening, due to
CRS does not take second and shortens Transmission Time Interval sTTI1, the 4th shortening Transmission Time Interval sTTI3, the 6th contracting
Short transmission time interval sTTI5 and the 7th corresponding subcarrier of first OFDM symbol for shortening Transmission Time Interval sTTI6,
Corresponding 4 RE of t easet ofasubcarriers { 4,5,10,11 } can thus be used respectively as 4 RE of DMRS；For the 3rd contracting
Short transmission time interval sTTI2 and the 5th shortening Transmission Time Interval sTTI4, the 3rd is taken due to CRS and shortens biography respectively
Defeated time interval sTTI2 and the 5th corresponding subcarrier structure of first OFDM symbol shortened in Transmission Time Interval sTTI4
Into t easet ofasubcarriers be { 1,4,7,10 }, thus can be using removing subcarrier in t easet ofasubcarriers { 3,4,5,9,10,11 }
Set { 4,7 } afterwards remaining subcarrier, i.e. corresponding 4 RE of t easet ofasubcarriers { 3,5,9,11 } respectively as DMRS in 4 RE.
Referring to Fig. 8, when CRS skews are 2, because the t easet ofasubcarriers shared by CRS in PRB are { 2,5,8,11 },
That is the subcarrier shared by CRS includes two subcarriers in t easet ofasubcarriers { 4,5,10,11 } respectively.Therefore, it is possible to use
The corresponding DMRS symbols of the corresponding DMRS symbol transmissions of subcarrier transmission in { 3,4,5,9,10,11 } shared by non-CRS, namely
T easet ofasubcarriers { 3,5,9,11 } corresponding RE can be used as 4 RE of DMRS.
Accorded with transmitting corresponding DMRS using the subcarrier shared by non-CRS in t easet ofasubcarriers { 3,4,5,9,10,11 }
As a example by number corresponding DMRS symbols of transmission, specifically, shorten for second Transmission Time Interval sTTI1, the 4th shorten and pass
Defeated time interval sTTI3, Transmission Time Interval sTTI5 and the 7th shortening Transmission Time Interval sTTI6 of the 6th shortening, due to
CRS does not take second and shortens Transmission Time Interval sTTI1, the 4th shortening Transmission Time Interval sTTI3, the 6th shortening
Transmission Time Interval sTTI5 and the 7th corresponding subcarrier of first OFDM symbol shortened in Transmission Time Interval sTTI6,
Can thus use corresponding 4 RE of t easet ofasubcarriers { 4,5,10,11 } respectively as DMRS in 4 RE；For the 3rd contracting
Short transmission time interval sTTI2 and the 5th shortening Transmission Time Interval sTTI4, due to the 3rd shortening that CRS takes respectively
Transmission Time Interval sTTI2 and the 5th corresponding subcarrier of first OFDM symbol shortened in Transmission Time Interval sTTI4
The t easet ofasubcarriers of composition are { 2,5,8,11 }, thus can be carried using son is removed in t easet ofasubcarriers { 3,4,5,9,10,11 }
Ripple set { 5,11 } afterwards remaining subcarrier, i.e. corresponding 4 RE of t easet ofasubcarriers { 3,4,9,10 } respectively as DMRS at 4
RE。
The situation execution that CRS skews are respectively 0,1,2 is respectively referred to when CRS skews are respectively 3,4,5, no longer
Repeat.
It is to be herein pointed out above-mentioned only include 14 subframes of OFDM symbol, each subframe bag to configure routine CP
7 sTTI are included, every 2 OFDM symbols are constituted as a example by a sTTI, to the transmission side of DMRS in the sTTI in the embodiment of the present invention
Method is described in detail.It will be appreciated by those skilled in the art that, accorded with comprising 12 OFDM for configuration extension CP
Number subframe and including 7 sTTI of OFDM symbol, and in PRB sTTI pattern configurations it is different when, equally can also reference
Above-mentioned mode carries out the configuration of the pattern of DMRS character positions, will not be repeated here.
The transmission method of DMRS is described in detail in the above-mentioned sTTI in the embodiment of the present invention, is set for user
It is standby, when the reception of DMRS is carried out, can first determine the information of the position of the symbol of DMRS, such as agreement according to agreement is carried out
It is determined that, corresponding DMRS is received at the position where the symbol of identified DMRS, and channel estimation etc. is carried out, specifically
The position of the symbol of DMRS, referring in particular to the introduction in the transmission method of DMRS in the corresponding sTTI of base station side, herein no longer
Repeat.
The above-mentioned corresponding device of method will be further described in detail below.
Fig. 9 shows a kind of base station in the embodiment of the present invention.Referring to Fig. 9, a kind of base station 900 in the embodiment of the present invention
Acquiring unit 901 and transmission unit 902 can be included, wherein：
The acquiring unit 901, is suitable to obtain the information of the resource in sTTI shared by non-CRS；
The transmission unit 902, the demodulation of the resource transmission user equipment being adapted in use in the sTTI shared by non-CRS
Reference signal.
In specific implementation, the transmission unit 902 is adapted in use to the OFDM symbol shared by non-CRS in the sTTI
Transmit the symbol of corresponding demodulated reference signal.
In specific implementation, the transmission unit 902 is suitable to when first OFDM symbol in sTTI is shared by non-CRS
During OFDM symbol, the symbol of corresponding demodulated reference signal is transmitted using first OFDM symbol in sTTI.
In an embodiment of the present invention, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each
When sTTI includes two OFDM symbols, the transmission unit is adapted in use to first in second sTTI and the 7th sTTI
OFDM symbol transmits the symbol of corresponding demodulated reference signal；Use the 3rd sTTI, the 4th sTTI, the 5th sTTI and
OFDM symbol in six sTTI shared by non-CRS transmits the symbol of corresponding demodulated reference signal.
In an embodiment of the present invention, the shared subcarrier collection in each PRB of the symbol of the demodulated reference signal
It is combined into the subset of subcarrier shared by non-CRS in t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }.
In an embodiment of the present invention, the shared subcarrier collection in each PRB of the symbol of the demodulated reference signal
Close { 0,1,6,7 } or { 4,5,10,11 }.
In specific implementation, the transmission unit 902 is suitable to, based on cell identity information, determine CRS in each PRB
The information of shared subcarrier；Passed using the subcarrier shared by non-CRS in first OFDM symbol in sTTI and each PRB
The symbol of defeated corresponding demodulated reference signal.
In specific implementation, the transmission unit 902, alternatively, the transmission unit is suitable to when shared by non-CRS in PRB
T easet ofasubcarriers are the subset of t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }, and the corresponding sub-carrier number of the subset
When amount is more than or equal to the quantity for transmitting the subcarrier that DMRS needs, the subcarrier of respective amount in described subset is constituted
T easet ofasubcarriers, as the t easet ofasubcarriers of transmission demodulated reference signal；The corresponding subcarrier of subset described in PRB
When quantity is less than the quantity for transmitting the subcarrier that DMRS needs, the son of respective numbers is chosen from t easet ofasubcarriers { 2,3,8,9 }
Carrier wave adds the subset, used as the t easet ofasubcarriers of transmission demodulated reference signal.
In an embodiment of the present invention, when the corresponding number of subcarriers of the subset is equal to the subcarrier that transmission DMRS needs
Quantity when, the subset be { 0,1,6,7 } or { 4,5,10,11 }.
In an embodiment of the present invention, the transmission unit 902, is suitable to when the t easet ofasubcarriers shared by non-CRS in PRB
Including { 0,1,6,7 } and during { 4,5,10,11 } at least one, using the t easet ofasubcarriers { 0,1,6,7 } in PRB or 4,5,10,
11 } corresponding demodulated reference signal is transmitted.
In an embodiment of the present invention, the transmission unit 902, is suitable to choose phase from t easet ofasubcarriers { 2,3,8,9 }
Answer quantity, and the subcarrier neighbouring with subcarrier in the subset adds the subset, as transmission demodulated reference signal
T easet ofasubcarriers.
In an embodiment of the present invention, the transmission unit 902, is suitable to include son when the subcarrier shared by CRS in PRB
During any two subcarrier in carrier set { 0,1,6,7 } or { 4,5,10,11 }, using t easet ofasubcarriers 0,1,2,6,7,
8 } subcarrier or in { 3,4,5,9,10,11 } shared by non-CRS transmits corresponding demodulated reference signal.
The structure of the above-mentioned corresponding user equipment in base station will be introduced below.
Referring to Figure 10, a kind of user equipment 10 in the embodiment of the present invention can include determining that unit 101 and receiving unit
102, wherein：
The determining unit 101, the information of the resource being adapted to determine that in sTTI shared by DMRS；Wherein, the DMRS institutes
The resource of occupancy is the resource shared by non-CRS；
The receiving unit 102, is suitable in sTTI reception base station at the corresponding position of the resource shared by DMRS and is passed
Defeated DMRS.
In specific implementation, the resource shared by the DMRS can be the OFDM symbols shared by non-CRS in the sTTI
Number.
It is described when first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS in specific implementation
Resource shared by DMRS is first OFDM symbol in sTTI.
In an embodiment of the present invention, it is configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each
When sTTI includes two OFDM symbols, the OFDM symbol shared by the DMRS, including：In second sTTI and the 7th sTTI
First OFDM symbol；In 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI shared by non-CRS
OFDM symbol.
In specific implementation, the resource shared by the DMRS includes：Shared t easet ofasubcarriers are son in each PRB
The subset of subcarrier shared by non-CRS in carrier set { 0,1,4,5,6,7,10,11 }.
In an embodiment of the present invention, the subcarrier shared by the DMRS includes：T easet ofasubcarriers in each PRB
{ 0,1,6,7 } or { 4,5,10,11 }.
In an embodiment of the present invention, the resource shared by the DMRS includes：First OFDM symbol and every in sTTI
Subcarrier in individual PRB shared by non-CRS.
In specific implementation, when the t easet ofasubcarriers shared by non-CRS in PRB be t easet ofasubcarriers 0,1,4,5,6,7,
10th, subset 11 }, and the corresponding number of subcarriers of the subset is more than or equal to the quantity of the subcarrier that transmission DMRS needs
When, the resource shared by the DMRS includes the subcarrier of respective amount in the subset；Subset described in PRB is corresponding
Subcarrier quantity less than the subcarrier that transmission DMRS needs quantity when, resource shared by the DMRS is included from sub- load
Subcarrier in the t easet ofasubcarriers that the subcarrier that respective numbers are chosen in ripple set { 2,3,8,9 } adds the subset to constitute.
In an embodiment of the present invention, when the corresponding number of subcarriers of the subset is equal to the subcarrier that transmission DMRS needs
Quantity when, the subset be { 0,1,6,7 } or { 4,5,10,11 }.
In an embodiment of the present invention, when the corresponding number of subcarriers of the subset is equal to the subcarrier that transmission DMRS needs
Quantity when, resource shared by the DMRS includes the subcarrier in subset { 0,1,6,7 } or { 4,5,10,11 }.
In specific implementation, what the quantity of the corresponding subcarrier of subset described in PRB needed less than transmission DMRS
During the quantity of subcarrier, the resource shared by the DMRS includes, the son of respective numbers is chosen from t easet ofasubcarriers { 2,3,8,9 }
Carrier wave adds the subcarrier in the t easet ofasubcarriers that the subset is constituted
In an embodiment of the present invention, when the subcarrier shared by CRS in PRB include t easet ofasubcarriers { 0,1,6,7 } or
During any two subcarrier in { 4,5,10,11 }, the resource shared by DMRS include the t easet ofasubcarriers 0,1,2,6,7,
8 } subcarrier or in { 3,4,5,9,10,11 } shared by non-CRS is the resource shared by the DMRS.
Using the such scheme in the embodiment of the present invention, when downlink data transmission is carried out using sTTI, by using institute
State the demodulated reference signal of the resource transmission user equipment in sTTI shared by non-CRS, it is possible to achieve corresponding descending UE grades
The downlink transfer of DRS (Dedicated Reference Signal), and avoid resource that the demodulated reference signal of user equipment used with shared by CRS
Conflict between resource, improves the transmission quality of downlink data.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with instructing the hardware of correlation by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, are not departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (48)
1. in a kind of sTTI demodulated reference signal transmission method, it is characterised in that including：
Obtain the information of the resource in sTTI shared by non-CRS；
Use the demodulated reference signal of the resource transmission user equipment shared by non-CRS in the sTTI.
2. in sTTI according to claim 1 demodulated reference signal transmission method, it is characterised in that it is described using described
The demodulated reference signal of the resource transmission user equipment in sTTI shared by non-CRS,
Including：Corresponding demodulated reference signal is transmitted using the OFDM symbol shared by non-CRS in the sTTI.
3. in sTTI according to claim 2 demodulated reference signal transmission method, it is characterised in that it is described using described
OFDM symbol in sTTI shared by non-CRS transmits corresponding demodulated reference signal, including：
When first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS, first OFDM in sTTI is used
The corresponding demodulated reference signal of symbol transmission.
4. in sTTI according to claim 3 demodulated reference signal transmission method, it is characterised in that when subframe for configuration
Conventional CP and including 14 subframes of OFDM symbol, and each sTTI is when including two OFDM symbols, it is described to use the sTTI
OFDM symbol shared by interior non-CRS transmits corresponding demodulated reference signal, including：
Corresponding demodulated reference signal is transmitted using first OFDM symbol in second sTTI and the 7th sTTI；
Passed using the OFDM symbol shared by non-CRS in the 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI
Defeated corresponding demodulated reference signal.
5. in the sTTI according to claim any one of 2-4 demodulated reference signal transmission method, it is characterised in that it is described
The shared t easet ofasubcarriers in each PRB of demodulated reference signal are non-in t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }
The subset of subcarrier shared by CRS.
6. in sTTI according to claim 5 demodulated reference signal transmission method, it is characterised in that the demodulation reference
The shared t easet ofasubcarriers in each PRB of signal { 0,1,6,7 } or { 4,5,10,11 }.
7. in sTTI according to claim 1 demodulated reference signal transmission method, it is characterised in that it is described using described
The demodulated reference signal of the resource transmission user equipment in sTTI shared by non-CRS, including：
Based on cell identity information, the information of the shared subcarriers in each PRB of CRS is determined；
Corresponding demodulation reference is transmitted using the subcarrier shared by non-CRS in first OFDM symbol in sTTI and each PRB
Signal.
8. in sTTI according to claim 7 demodulated reference signal transmission method, it is characterised in that the use sTTI
Subcarrier in interior first OFDM symbol and each PRB shared by non-CRS transmits corresponding demodulated reference signal, including：
When the subset that the t easet ofasubcarriers shared by non-CRS in PRB are t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }, and institute
When stating the quantity of subcarrier of the corresponding number of subcarriers of subset more than or equal to transmission demodulated reference signal needs, will be described
The t easet ofasubcarriers that the subcarrier of respective amount is constituted in subset, as the t easet ofasubcarriers of transmission demodulated reference signal；
Number of the quantity of the corresponding subcarrier of subset described in PRB less than the subcarrier that transmission demodulated reference signal needs
During amount, the subcarrier that respective numbers are chosen from t easet ofasubcarriers { 2,3,8,9 } adds the subset, used as transmission demodulation reference
The t easet ofasubcarriers of signal.
9. in sTTI according to claim 8 demodulated reference signal transmission method, it is characterised in that when the subset pair
The number of subcarriers answered be equal to transmission demodulated reference signal need subcarrier quantity when, the subset be { 0,1,6,7 } or
{4、5、10、11}。
10. in sTTI according to claim 9 demodulated reference signal transmission method, it is characterised in that the use
Subcarrier in sTTI in first OFDM symbol and each PRB shared by non-CRS transmits corresponding demodulated reference signal, bag
Include：
When the t easet ofasubcarriers shared by non-CRS in PRB include { 0,1,6,7 } and { 4,5,10,11 } at least one, use
T easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 } in PRB transmit corresponding demodulated reference signal.
The transmission method of demodulated reference signal in 11. sTTI according to claim 8, it is characterised in that described from sub- load
The subcarrier that respective numbers are chosen in ripple set { 2,3,8,9 } adds the subset, used as the subcarrier of transmission demodulated reference signal
Set, including：Choose respective numbers from the t easet ofasubcarriers { 2,3,8,9 }, and the son neighbouring with subcarrier in the subset
Carrier wave adds the subset, used as the t easet ofasubcarriers of transmission demodulated reference signal.
The transmission method of demodulated reference signal in 12. sTTI according to claim 11, it is characterised in that described to work as PRB
When the quantity of the interior described corresponding subcarrier of subset is less than the quantity for transmitting the subcarrier that demodulated reference signal needs, from son
The subcarrier that respective numbers are chosen in carrier set { 2,3,8,9 } adds the subset, used as the son of transmission demodulated reference signal
Carrier set, including：
Any two in the subcarrier shared by CRS in PRB includes t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }
During subcarrier, passed using the subcarrier shared by non-CRS in t easet ofasubcarriers { 0,1,2,6,7,8 } or { 3,4,5,9,10,11 }
Defeated corresponding demodulated reference signal.
The method of reseptance of demodulated reference signal in a kind of 13. sTTI, it is characterised in that including：
Determine the information of the resource in sTTI shared by demodulated reference signal；Wherein, the money shared by the demodulated reference signal
Source is the resource shared by non-CRS；
The demodulated reference signal that base station is transmitted is received at the corresponding position of resource in the sTTI shared by demodulated reference signal.
The method of reseptance of demodulated reference signal in 14. sTTI according to claim 13, it is characterised in that
Resource shared by the demodulated reference signal is the OFDM symbol shared by non-CRS in the sTTI.
The method of reseptance of demodulated reference signal in 15. sTTI according to claim 14, it is characterised in that
When first OFDM symbol in sTTI is the OFDM symbol shared by non-CRS, shared by the demodulated reference signal
Resource be first OFDM symbol in sTTI.
The method of reseptance of demodulated reference signal in 16. sTTI according to claim 15, it is characterised in that
Be configuration routine CP and including 14 subframes of OFDM symbol when subframe, and each sTTI including two OFDM symbols when,
OFDM symbol shared by the demodulated reference signal, including：
First OFDM symbol in second sTTI and the 7th sTTI；
OFDM symbol in 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI shared by non-CRS.
The method of reseptance of demodulated reference signal in 17. sTTI according to claim any one of 14-16, it is characterised in that
Resource shared by the demodulated reference signal includes：In each PRB shared t easet ofasubcarriers be t easet ofasubcarriers 0,1,
4th, the subset of subcarrier shared by non-CRS in 5,6,7,10,11 }.
The method of reseptance of demodulated reference signal in 18. sTTI according to claim 17, it is characterised in that the demodulation ginseng
Examine the t easet ofasubcarriers that subcarrier shared by signal is constituted, including t easet ofasubcarriers { 0,1,6,7 } in each PRB or 4,
5、10、11}。
The method of reseptance of demodulated reference signal in 19. sTTI according to claim 13, it is characterised in that the demodulation ginseng
Examining the resource shared by signal includes：Subcarrier in sTTI in first OFDM symbol and each PRB shared by non-CRS.
The method of reseptance of demodulated reference signal in 20. sTTI according to claim 19, it is characterised in that
When the subset that the t easet ofasubcarriers shared by non-CRS in PRB are t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }, and institute
When stating the quantity of subcarrier of the corresponding number of subcarriers of subset more than or equal to transmission demodulated reference signal needs, the demodulation
Resource shared by reference signal includes the subcarrier of respective amount in the subset；
Number of the quantity of the corresponding subcarrier of subset described in PRB less than the subcarrier that transmission demodulated reference signal needs
During amount, the resource shared by the demodulated reference signal includes being chosen from t easet ofasubcarriers { 2,3,8,9 } son of respective numbers
Carrier wave adds the subcarrier in the t easet ofasubcarriers that the subset is constituted.
The method of reseptance of demodulated reference signal in 21. sTTI according to claim 20, it is characterised in that
When the corresponding number of subcarriers of the subset is equal to the quantity of the subcarrier that transmission demodulated reference signal needs, the son
Collect is { 0,1,6,7 } or { 4,5,10,11 }.
The method of reseptance of demodulated reference signal in 22. sTTI according to claim 21, it is characterised in that
When the corresponding number of subcarriers of the subset is equal to the quantity of the subcarrier that transmission demodulated reference signal needs, the solution
Adjusting the resource shared by reference signal includes the subcarrier in subset { 0,1,6,7 } or { 4,5,10,11 }.
The method of reseptance of demodulated reference signal in 23. sTTI according to claim 20, it is characterised in that
Number of the quantity of the corresponding subcarrier of subset described in PRB less than the subcarrier that transmission demodulated reference signal needs
During amount, the resource shared by the demodulated reference signal includes, the son for choosing respective numbers from t easet ofasubcarriers { 2,3,8,9 } is carried
Ripple adds the subcarrier in the t easet ofasubcarriers that the subset is constituted.
The method of reseptance of demodulated reference signal in 24. sTTI according to claim 23, it is characterised in that
Any two in the subcarrier shared by CRS in PRB includes t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }
During subcarrier, resource shared by demodulated reference signal include the t easet ofasubcarriers { 0,1,2,6,7,8 } or 3,4,5,9,
10th, the subcarrier in 11 } shared by non-CRS is the resource shared by the demodulated reference signal.
A kind of 25. base stations, it is characterised in that including：
Acquiring unit, is suitable to obtain the information of the resource in sTTI shared by non-CRS；
Transmission unit, the demodulated reference signal of the resource transmission user equipment being adapted in use in the sTTI shared by non-CRS.
26. base stations according to claim 25, it is characterised in that the transmission unit, are adapted in use to non-in the sTTI
OFDM symbol shared by CRS transmits corresponding demodulated reference signal.
27. base stations according to claim 26, it is characterised in that the transmission unit, are suitable to as first in sTTI
When OFDM symbol is the OFDM symbol shared by non-CRS, corresponding demodulation ginseng is transmitted using first OFDM symbol in sTTI
Examine signal.
28. base stations according to claim 27, it is characterised in that the transmission unit, are suitable to when subframe for configuration is conventional
CP and including 14 subframes of OFDM symbol, and each sTTI is when including two OFDM symbols, it is described using non-in the sTTI
OFDM symbol shared by CRS transmits corresponding demodulated reference signal, uses first in second sTTI and the 7th sTTI
Individual OFDM symbol transmits corresponding demodulated reference signal；Using the 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th
OFDM symbol in sTTI shared by non-CRS transmits corresponding demodulated reference signal.
29. base station according to claim any one of 26-28, it is characterised in that the demodulated reference signal is in each PRB
Interior shared t easet ofasubcarriers are the subset of subcarrier shared by non-CRS in t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }.
30. base stations according to claim 29, it is characterised in that the demodulated reference signal is shared in each PRB
T easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }.
31. base stations according to claim 25, it is characterised in that the transmission unit, are suitable to based on cell identity information,
Determine the information of the shared subcarriers in each PRB of CRS；Using non-in first OFDM symbol in sTTI and each PRB
Subcarrier shared by CRS transmits corresponding demodulated reference signal.
32. base stations according to claim 31, it is characterised in that the transmission unit, are suitable to when shared by non-CRS in PRB
T easet ofasubcarriers are the subset of t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }, and the corresponding sub-carrier number of the subset
When amount is more than or equal to the quantity for transmitting the subcarrier that demodulated reference signal needs, the son of respective amount in described subset is carried
The t easet ofasubcarriers that ripple is constituted, as the t easet ofasubcarriers of transmission demodulated reference signal；Subset described in PRB is corresponding
When the quantity of subcarrier is less than the quantity for transmitting the subcarrier that demodulated reference signal needs, from t easet ofasubcarriers { 2,3,8,9 }
The subcarrier for choosing respective numbers adds the subset, used as the t easet ofasubcarriers of transmission demodulated reference signal.
33. base stations according to claim 32, it is characterised in that when the corresponding number of subcarriers of the subset is equal to transmission
During the quantity of the subcarrier that demodulated reference signal needs, the subset is { 0,1,6,7 } or { 4,5,10,11 }.
34. base stations according to claim 33, it is characterised in that the transmission unit, are suitable to when shared by non-CRS in PRB
T easet ofasubcarriers include { 0,1,6,7 } and { 4,5,10,11 } at least one when, using in PRB t easet ofasubcarriers 0,1,
6th, 7 } or { 4,5,10,11 } transmit corresponding demodulated reference signal.
35. base stations according to claim 32, it is characterised in that the transmission unit, be suitable to from t easet ofasubcarriers 2,3,
8th, respective numbers are chosen in 9 }, and the subcarrier neighbouring with subcarrier in the subset adds the subset, is solved as transmission
Adjust the t easet ofasubcarriers of reference signal.
36. base stations according to claim 35, it is characterised in that the transmission unit, are suitable to when shared by CRS in PRB
Subcarrier when including any two subcarrier in t easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 }, use subcarrier collection
Subcarrier in conjunction { 0,1,2,6,7,8 } or { 3,4,5,9,10,11 } shared by non-CRS transmits corresponding demodulated reference signal.
A kind of 37. user equipmenies, it is characterised in that including：
Determine the information of the resource in sTTI shared by demodulated reference signal；Wherein, the money shared by the demodulated reference signal
Source is the resource shared by non-CRS；
The demodulated reference signal that base station is transmitted is received at the corresponding position of resource in the sTTI shared by demodulated reference signal.
38. user equipment according to claim 37, it is characterised in that the resource shared by the demodulated reference signal is
OFDM symbol in the sTTI shared by non-CRS.
39. user equipment according to claim 38, it is characterised in that when first OFDM symbol in sTTI is non-
During OFDM symbol shared by CRS, the resource shared by the demodulated reference signal is first OFDM symbol in sTTI.
40. user equipment according to claim 39, it is characterised in that when subframe is for configuration routine CP and including 14
The subframe of OFDM symbol, and each sTTI include two OFDM symbols when, the OFDM symbol shared by the demodulated reference signal,
Including：
First OFDM symbol in second sTTI and the 7th sTTI；
OFDM symbol in 3rd sTTI, the 4th sTTI, the 5th sTTI and the 6th sTTI shared by non-CRS.
41. user equipment according to claim any one of 38-40, it is characterised in that shared by the demodulated reference signal
Resource includes：Shared t easet ofasubcarriers are non-in t easet ofasubcarriers { 0,1,4,5,6,7,10,11 } in each PRB
The subset of subcarrier shared by CRS.
42. user equipmenies according to claim 41, it is characterised in that the subcarrier shared by the demodulated reference signal
T easet ofasubcarriers { 0,1,6,7 } or { 4,5,10,11 } in the t easet ofasubcarriers of composition, including each PRB.
43. user equipment according to claim 37, it is characterised in that the resource bag shared by the demodulated reference signal
Include：Subcarrier in sTTI in first OFDM symbol and each PRB shared by non-CRS.
44. user equipmenies according to claim 43, it is characterised in that
When the subset that the t easet ofasubcarriers shared by non-CRS in PRB are t easet ofasubcarriers { 0,1,4,5,6,7,10,11 }, and institute
When stating the quantity of subcarrier of the corresponding number of subcarriers of subset more than or equal to transmission demodulated reference signal needs, the demodulation
Resource shared by reference signal includes the subcarrier of respective amount in the subset；
Number of the quantity of the corresponding subcarrier of subset described in PRB less than the subcarrier that transmission demodulated reference signal needs
During amount, the resource shared by the demodulated reference signal includes being chosen from t easet ofasubcarriers { 2,3,8,9 } son of respective numbers
Carrier wave adds the subcarrier in the t easet ofasubcarriers that the subset is constituted.
45. user equipmenies according to claim 44, it is characterised in that when the corresponding number of subcarriers of the subset is equal to
During the quantity of the subcarrier that transmission demodulated reference signal needs, the subset is { 0,1,6,7 } or { 4,5,10,11 }.
46. user equipmenies according to claim 45, it is characterised in that when the corresponding number of subcarriers of the subset is equal to
During the quantity of the subcarrier that transmission demodulated reference signal needs, resource shared by the demodulated reference signal include subset 0,
1st, the subcarrier 6,7 } or in { 4,5,10,11 }.
47. user equipmenies according to claim 44, it is characterised in that the corresponding sub- load of subset described in PRB
When the quantity of ripple is less than the quantity for transmitting the subcarrier that demodulated reference signal needs, the resource shared by the demodulated reference signal
Including during the subcarrier for choosing respective numbers from t easet ofasubcarriers { 2,3,8,9 } adds the t easet ofasubcarriers that the subset is constituted
Subcarrier.
48. user equipmenies according to claim 47, it is characterised in that when the subcarrier shared by CRS in PRB includes son
During any two subcarrier in carrier set { 0,1,6,7 } or { 4,5,10,11 }, the resource bag shared by demodulated reference signal
It is the demodulation to include the subcarrier in the t easet ofasubcarriers { 0,1,2,6,7,8 } or { 3,4,5,9,10,11 } shared by non-CRS
Resource shared by reference signal.
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