CN106330808B - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN106330808B CN106330808B CN201510379806.0A CN201510379806A CN106330808B CN 106330808 B CN106330808 B CN 106330808B CN 201510379806 A CN201510379806 A CN 201510379806A CN 106330808 B CN106330808 B CN 106330808B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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Abstract
The invention discloses a kind of data transmission method and devices, this method comprises: obtaining radio frames indicates information；Data are sent or received according to radio frames indicated by radio frames instruction information；Wherein, at least one special subframe of radio frames includes one for being continuously used for transmission the second OFDM symbol of SRS in the time domain as the first OFDM symbol of GP and at least three, and the first OFDM symbol and at least three second OFDM symbols are continuous in the time domain.The device is realization device corresponding with this method, by the above-mentioned means, the present invention can increase uplink detection signal resource, is conducive to configure short cycle uplink detection signal in multi-user's cell, improves wave beam forming performance.
Description
Technical field
The present invention relates to field fields of communication technology, more particularly to a kind of data transmission method and device.
Background technique
TDD (Time Division Duplex, the time-division in LTE (Long Term Evolution, long term evolution) system
Duplex) mode radio frames frame structure it is as shown in Figure 1.Referring to Fig. 1, Fig. 1 is the frame structure signal of radio frames in TDD-LTE
Figure.In the present embodiment, the radio frames of each 10ms are divided into two a length of Tslot=153600 × TSThe field of=5ms, Mei Geban
Frame includes 8 a length of Tslot=15360 × TSThe time slot of=0.5ms and 3 special time slots: DwPTS (Downlink Pilot
Time Slot, the leading time slot of downlink), GP (Guard Period, protection interval) and UpPTS (Uplink Pilot Time
Slot, uplink pilot time slot).
DwPTS, GP and UpPTS occupy the length of a 1ms subframe, referred to as special subframe S, and the specific ratio of three parts
Example can be according to the definition option configuration of agreement.Since under different application scenarios, the demand of uplink and downlink portfolio is had differences.Than
Such as, for pure speech network, the business demand of usual uplink and downlink is basic equity；But for data service, usually
Data downloading can the bigger bandwidth demand of much larger namely downlink relative uplink presence compared to the business demand amount that data upload；
TDD-LTE supports the adjustment of uplink and downlink proportion, supports the switching cycle of 5ms and 10ms.For different switching cycles, special son
The structure of frame difference.If the switching point period is 5ms:UpPTS, subframe 2 and 7 remains for uplink in advance.If switching
The point period is that 10ms: the first field includes DwPTS, GP and UpPTS, and second field only includes DwPTS, and length is 1ms.
As shown in following table one, table one is the sub-frame configuration table of common radio frames.
The sub-frame configuration table of the common radio frames of table one.
Special subframe includes that (uplink is led by DwPTS (the leading time slot of downlink), GP (protection interval, i.e. protection interval) and UpPTS
Frequency time slot) three parts.Transmission (carrying upper layer data, function indifference with common downlink subframe of the DwPTS for downlink signal
Not), it is configured according to different special subframes, length can take 3~12 OFDM (Orthogonal Frequency
Division Multiplexing, orthogonal frequency division multiplexi) symbol.Transmission of the UpPTS for uplink signal (is not used in and holds
Upper layer data is carried, but can be used as random access channel or send uplink detection signal SRS), matched according to different special subframes
It sets, length can take 1~2 symbol.Incorporated by reference to text refering to table two, table two is the proportion table of special subframe sign bit.
The proportion table of two special subframe of table
Uplink detection signal (SRS, Sounding Reference Signal) is dispatched by high system level, is mainly used for letter
Road measurement, to realize that the dynamic adjustment of uplink MCS and upstream frequency are selectively dispatched.Meanwhile channel is measured by SRS
Information estimates up channel matrix H, is used for down beam shaping (BF, Beam forming), supports the power of down beam shaping
Value calculates.
As shown in Fig. 2, Fig. 2 is the schematic diagram of SRS and GP configuration in existing frame structure.Each grid represents in Fig. 2
One OFDM symbol, filling pattern are that the grid of slash indicates this OFDM symbol for as GP, filling pattern to be positive back slash
The grid of the lattice intersected to form indicates this OFDM symbol for sending SRS, and U represents sub-frame of uplink in figure, and D represents downlink
Subframe, S represent special subframe, and uplink and downlink switching cycle is 5ms, and SRS can be only fitted to uplink pilot time slot UpPTS or uplink
Subframe S (if configuration can only occupy the last one OFDM symbol in sub-frame of uplink S) usually configures to save ascending resource
In uplink pilot time slot UpPTS, if increasing by 1 OFDM symbol in sub-frame of uplink there are also being exactly that number of users is relatively more to send out
Send SRS still insufficient, then needing to try every possible means to continue to extend at present.
A kind of existing scheme is by increasing the SRS period come so that the number of users of support increases, frame is matched in figure 2 above
For (there are 4 OFDM symbols to can be used to send SRS in a radio frames): with the increase of number of users, short-period SRS resource
Configuration is not enough to support multi-user, it is therefore desirable to long period SRS is selected, and as the increase BF performance in SRS period gradually decreases
(SUBF/MUBF in tetra- kinds of periodic performance linear reductions of 5ms/10ms/20ms/40ms, successively are as follows: 1,0.8667,0.7333,
0.6), Single-user beamforming (SUBF, single user wave beam forming) and Multi-user beamforming
(MUBF, forming multiuser wave beam).
Under the existing frame structure of table three, different user specification cell SRS resource allocation plan
BF performance is an important indicator of antenna performance, and multiple antennas (MIMO) technology is that TD-LTE promotes covering, capacity
The important means of performance, wherein wave beam forming (BF) is a kind of Signal Pretreatment technology based on aerial array, and wave beam forming is logical
The weighting coefficient of each array element generates the wave beam with directive property in toning linear array all day, so as to obtain apparent array
Gain.Therefore, beamforming technique has very big in terms of expanding the coverage area, improving edge throughput and interference
Advantage, be important application of the multiple antennas in TD-LTE.BF technology relies on SRS pilot frequency acquisition channel information, and the SRS period is shorter,
BF performance is better.However as previously mentioned, SRS resource becomes BF performance bottleneck under the more scene of number of users.
Accordingly, it is desirable to provide a kind of data transmission method and device, to solve the above problems.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of data transmission method and devices, can increase uplink spy
Signal resource is surveyed, is conducive to configure short cycle uplink detection signal in multi-user's cell, improves wave beam forming performance.
First aspect provides a kind of data transmission method, this method comprises: obtaining radio frames indicates information；According to radio frames
Indicate that radio frames indicated by information send or receive data；Wherein, at least one special subframe of radio frames includes one
For being continuously used for transmission the second OFDM symbol of SRS in the time domain as the first OFDM symbol of GP and at least three, the
One OFDM symbol and at least three second OFDM symbols are continuous in the time domain.
In the first possible implementation of the first aspect, the 11st OFDM symbol of at least one special subframe
For the first OFDM symbol, the 12nd OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol,
14th OFDM symbol is the second OFDM symbol.
In the second possible implementation of the first aspect, the tenth OFDM symbol of at least one special subframe is
First OFDM symbol, the 11st OFDM symbol are the second OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol, the
13 OFDM symbols are the second OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.
With reference to first aspect with first aspect the first to second of possible implementation, in the third possible reality
In existing mode, at least one downlink subframe of radio frames includes first OFDM symbol and at least one second OFDM symbol,
One the first OFDM symbol and at least one second OFDM symbol are continuous in the time domain.
The third possible implementation with reference to first aspect, in the fourth possible implementation, at least one
13rd OFDM symbol of downlink subframe is the first OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.
The third possible implementation with reference to first aspect, in a fifth possible implementation, at least one
Tenth OFDM symbol of downlink subframe is the first OFDM symbol, and the 11st OFDM symbol is the second OFDM symbol, the 12nd
A OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is the
Two OFDM symbols.
With reference to first aspect with first aspect the first to second of possible implementation, in the 6th kind of possible reality
In existing mode, at least one downlink subframe of radio frames is including second OFDM symbol or including multiple continuous in the time domain
The second OFDM symbol, one or more second OFDM symbol and a upper subframe are continuous in the time domain.
The 6th kind of possible implementation with reference to first aspect, in the 7th kind of possible implementation, at least one
First OFDM symbol of downlink subframe is the second OFDM symbol.
The 6th kind of possible implementation with reference to first aspect, in the 8th kind of possible implementation, at least one
First OFDM symbol of downlink subframe is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol.
The 6th kind of possible implementation with reference to first aspect, in the 9th kind of possible implementation, at least one
First OFDM symbol of downlink subframe is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol, third
OFDM symbol is the second OFDM symbol.
The 6th kind of possible implementation with reference to first aspect, in the tenth kind of possible implementation, second
OFDM symbol is the second OFDM symbol, and third OFDM symbol is the second OFDM symbol, and the 4th OFDM symbol is the 2nd OFDM
Symbol.
Second aspect provides a kind of data transmission device, and device includes: data obtaining module, for obtaining radio frames instruction
Information；Data transmission module sends or receives data for the radio frames according to indicated by radio frames instruction information；Wherein,
At least one special subframe of radio frames includes one for connecting in the time domain as the first OFDM symbol of GP and at least three
Continuous the second OFDM symbol for being used for transmission SRS, the first OFDM symbol and at least three second OFDM symbols are continuous in the time domain.
In the first possible implementation of the second aspect, the 11st OFDM symbol of at least one special subframe
For the first OFDM symbol, the 12nd OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol,
14th OFDM symbol is the second OFDM symbol.
In a second possible implementation of the second aspect, the tenth OFDM symbol of at least one special subframe is
First OFDM symbol, the 11st OFDM symbol are the second OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol, the
13 OFDM symbols are the second OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.
In conjunction with the first of second aspect and second aspect to second of possible implementation, in the third possible reality
In existing mode, at least one downlink subframe of radio frames includes first OFDM symbol and at least one second OFDM symbol,
One the first OFDM symbol and at least one second OFDM symbol are continuous in the time domain.
In conjunction with the third possible implementation of second aspect, in the fourth possible implementation, at least one
13rd OFDM symbol of downlink subframe is the first OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.
In conjunction with the third possible implementation of second aspect, in a fifth possible implementation, at least one
Tenth OFDM symbol of downlink subframe is the first OFDM symbol, and the 11st OFDM symbol is the second OFDM symbol, the 12nd
A OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is the
Two OFDM symbols.
In conjunction with the first of second aspect and second aspect to second of possible implementation, in the 6th kind of possible reality
In existing mode, at least one downlink subframe of radio frames is including second OFDM symbol or including multiple continuous in the time domain
The second OFDM symbol, one or more second OFDM symbol and a upper subframe are continuous in the time domain.
In conjunction with the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation, at least one
First OFDM symbol of downlink subframe is the second OFDM symbol.
In conjunction with the 6th kind of possible implementation of second aspect, in the 8th kind of possible implementation, at least one
First OFDM symbol of downlink subframe is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol.
In conjunction with the 6th kind of possible implementation of second aspect, in the 9th kind of possible implementation, at least one
First OFDM symbol of downlink subframe is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol, third
OFDM symbol is the second OFDM symbol.
In conjunction with the 6th kind of possible implementation of second aspect, in the tenth kind of possible implementation, second
OFDM symbol is the second OFDM symbol, and third OFDM symbol is the second OFDM symbol, and the 4th OFDM symbol is the 2nd OFDM
Symbol.
The beneficial effects of the present invention are: being in contrast to the prior art, the present invention is by configuring at least the one of radio frames
A special subframe includes one for being continuously used for transmission SRS in the time domain as the first OFDM symbol of GP and at least three
The second OFDM symbol, the first OFDM symbol and at least three second OFDM symbols are continuous in the time domain, on increasing
Row detectable signal resource is conducive to configure short cycle uplink detection signal in multi-user's cell, improves wave beam forming performance.
Detailed description of the invention
Fig. 1 is the frame structure schematic diagram of radio frames in TDD-LTE；
Fig. 2 is the schematic diagram of SRS and GP configuration in existing frame structure；
Fig. 3 is the flow chart of data transmission method of the present invention；
Fig. 4 is the first embodiment schematic diagram of radio frames in data transmission method of the present invention；
Fig. 5 is second of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Fig. 6 is the third embodiment schematic diagram of radio frames in data transmission method of the present invention；
Fig. 7 is the 4th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Fig. 8 is the 5th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Fig. 9 is the 6th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 10 is the 7th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 11 is the 8th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 12 is the 9th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 13 is the tenth kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 14 is a kind of the tenth embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 15 is the 12nd kind of embodiment schematic diagram of radio frames in data transmission method of the present invention；
Figure 16 is the module diagram of data transmission device of the present invention.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to Fig. 3, Fig. 3 is the flow chart of data transmission method of the present invention.In the present embodiment, data transmission method packet
Include following step:
Step S11: radio frames are obtained and indicate information；
Step S12: data are sent or received according to radio frames indicated by radio frames instruction information；
In step s 12, at least one special subframe of radio frames include one for as GP (Guard Period,
Protection interval) the first OFDM symbol and at least three be continuously used for transmission SRS (Sounding Reference in the time domain
Signal, uplink detection signal) the second OFDM symbol, the first OFDM symbol and at least three second OFDM symbols are in the time domain
Continuously.First OFDM symbol is used to be used as GP, i.e., does not send or receive any data, the second OFDM symbol is used for transmission SRS.
Illustrate the different embodiments of radio frames in data transmission method below with reference to data transmission method of the invention.
Illustrate incorporated by reference to Fig. 3 refering to the first embodiment that Fig. 4, Fig. 4 are radio frames in data transmission method of the present invention
Figure.In Fig. 4 and following figures, U indicates that sub-frame of uplink, D indicate that downlink subframe, S indicate special subframe.
Half of radio frames of 5ms are shown, subframe sequencing is followed successively by downlink subframe, special in half of radio frames in Fig. 4
Subframe, sub-frame of uplink, downlink subframe, downlink subframe.The uplink and downlink switching cycle of radio frames is 5ms, i.e., preceding half of radio frames
The sequencing of middle subframe is consistent with the subframe sequencing of rear half of radio frames.Be understood that as 2nd kind in table one above
Configuration, in the radio frames of entire 10ms the sequencing of subframe be downlink subframe, special subframe, sub-frame of uplink, downlink subframe, under
Row subframe, downlink subframe, special subframe, sub-frame of uplink, downlink subframe, downlink subframe.Certainly, in other embodiments, wirelessly
The sequence of subframe can be any one shown in literary table one as above in frame.
Filling pattern is the first OFDM symbol of representative of slash, the net that filling pattern is positive, back slash intersects to form in Fig. 4
Grid pattern represents the second OFDM symbol, each subframe includes 14 OFDM symbols, and hereinafter each figure is also such.
As shown in figure 4, at least one is special in the first embodiment of the radio frames of data transmission method of the present invention
11st OFDM symbol of subframe is the first OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol, the 13rd
OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.
Preferably, in the present embodiment, the 11st OFDM symbol of special subframe 11 be the first OFDM symbol, the tenth
Two OFDM symbols are the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is
Second OFDM symbol.
The ordering of sub-frames of half of radio frames is only shown, it is preferable that special subframe in other half of radio frames in Fig. 4
Also consistent with special subframe 11, i.e., the 11st OFDM symbol of the special subframe in other half of radio frames is the first OFDM symbol
Number, the 12nd OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the 14th OFDM
Symbol is the second OFDM symbol.Therefore, there are two the tenth of special pointer for entire 10ms radio frames reality in the present embodiment
One OFDM symbol is the first OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is
Second OFDM symbol, the 14th OFDM symbol are the second OFDM symbol.I.e. in the present embodiment, first in entire radio frames
The quantity of OFDM symbol is 2, and the quantity of the second OFDM symbol is 6.
Illustrate incorporated by reference to Fig. 3 refering to second of embodiment that Fig. 5, Fig. 4 are radio frames in data transmission method of the present invention
Figure.
As shown in Figure 5, it is preferable that special in second of embodiment of the radio frames of data transmission method of the present invention
11st OFDM symbol of subframe 21 is the first OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol, the 13rd
A OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.
Preferably, present embodiment further increases SRS resource in downlink subframe.
At least one downlink subframe 22 of radio frames includes first OFDM symbol and at least one second OFDM symbol,
One the first OFDM symbol and at least one second OFDM symbol are continuous in the time domain.
It is further preferable that in the present embodiment, in half of radio frames, there is the 13rd OFDM of a downlink subframe 22
Symbol is the first OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol, that is to say, that there are two in entire radio frames
13rd OFDM symbol of downlink subframe is the first OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.Exist
In present embodiment, the quantity of the first OFDM symbol is 4 in entire radio frames, and the quantity of the second OFDM symbol is 8.
It is understood that in other embodiments, second relative to radio frames in data transmission method of the present invention
Kind embodiment can configure the first OFDM symbol and the second OFDM symbol in more downlink subframes.
For example, referring to Fig. 6, Fig. 6 is the third embodiment schematic diagram of radio frames in data transmission method of the present invention.
In the present embodiment, on the basis of second of embodiment, the first OFDM symbol is further configured in downlink subframe 23
Number and the second OFDM symbol, i.e., in the present embodiment, in half of radio frames, there are two downlink subframe 22,23 the 13rd
A OFDM symbol is the first OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol, that is to say, that in entire radio frames
It is the first OFDM symbol there are four the 13rd OFDM symbol of downlink subframe, the 14th OFDM symbol is the 2nd OFDM symbol
Number.I.e. in the present embodiment, the quantity of the first OFDM symbol is 6 in entire radio frames, and the quantity of the second OFDM symbol is 10.
For another example referring to Fig. 7, Fig. 7 is the 4th kind of embodiment signal of radio frames in data transmission method of the present invention
Figure.In the present embodiment, on the basis of the third embodiment, the first OFDM is further configured in downlink subframe 24
Symbol and the second OFDM symbol, i.e., in the present embodiment, in half of radio frames, there are three the of downlink subframe 22,23,24
13 OFDM symbols are the first OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol, that is to say, that entire wireless
The 13rd OFDM symbol of downlink subframe is the first OFDM symbol there are six in frame, and the 14th OFDM symbol is the 2nd OFDM
Symbol.I.e. in the present embodiment, the quantity of the first OFDM symbol is 8 in entire radio frames, and the quantity of the second OFDM symbol is
12。
In another example referring to Fig. 8, Fig. 8 is the 5th kind of embodiment signal of radio frames in data transmission method of the present invention
Figure.In the present embodiment, uplink and downlink switching cycle is 10ms, and in preceding half of radio frames and rear half of radio frames, subframe
Sequentially inconsistent, therefore, Fig. 8 shows the chronological order of the subframe of entire radio frames, and is followed successively by special subframe, uplink
Subframe, downlink subframe, downlink subframe, downlink subframe, downlink subframe, downlink subframe, downlink subframe, special subframe, sub-frame of uplink.
In the present embodiment, the 11st OFDM symbol of two special subframes 51,52 is first in entire radio frames
OFDM symbol, the 12nd OFDM symbol are the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the 14th
A OFDM symbol is the second OFDM symbol.
It is further, in the present embodiment, entire that there are four the 13rd OFDM symbols of downlink subframe 53,54,55,56
For the first OFDM symbol, the 14th OFDM symbol is the second OFDM symbol.
In the present embodiment, the quantity of the first OFDM symbol is 6 in entire radio frames, and the quantity of the second OFDM symbol is
10。
The first embodiment in conjunction with radio frames in data transmission method of the invention is further referring to Fig. 9, Fig. 9
6th kind of embodiment schematic diagram of radio frames in data transmission method of the present invention.In the present embodiment, in the first implementation
Further increase SRS resource on the basis of mode at the starting OFDM symbol in the downlink subframe after sub-frame of uplink.
In the 6th kind of embodiment, at least one downlink subframe of radio frames includes second OFDM symbol or more
A the second OFDM symbol continuous in the time domain, one or more second OFDM symbol connect in the time domain with a upper subframe
It is continuous.
Preferably, in the present embodiment, in half of radio frames, first OFDM symbol of a downlink subframe 63 is
Second OFDM symbol is the second OFDM symbol there are two first OFDM symbol of downlink subframe that is, in entire radio frames.?
In present embodiment, the quantity of the first OFDM symbol is 2 in entire radio frames, and the quantity of the second OFDM symbol is 8.
It in other implementations, can be on the basis of the 6th kind of embodiment further in downlink subframe 63
Increase the quantity of the second OFDM symbol.
For example, referring to Fig. 10, Figure 10 is the 7th kind of embodiment signal of radio frames in data transmission method of the present invention
Figure.In the present embodiment, in half of radio frames, first OFDM symbol of a downlink subframe 73 is the 2nd OFDM symbol
Number, and second OFDM symbol is the second OFDM symbol, i.e., in entire radio frames, there are two first OFDM of downlink subframe
Symbol is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol.In the present embodiment, in entire radio frames
The quantity of first OFDM symbol is 2, and the quantity of the second OFDM symbol is 10.
For another example please referring to Figure 11, Figure 11 is that the 8th kind of embodiment of radio frames in data transmission method of the present invention is shown
It is intended to.In the present embodiment, in half of radio frames, first OFDM symbol of a downlink subframe 83 is the 2nd OFDM symbol
Number, and second OFDM symbol is the second OFDM symbol, third OFDM symbol is the second OFDM symbol.I.e. in entire radio frames
In, it is the second OFDM symbol there are two first OFDM symbol of downlink subframe, and second OFDM symbol is the 2nd OFDM symbol
Number, third OFDM symbol is the second OFDM symbol.In the present embodiment, in entire radio frames the first OFDM symbol quantity
It is 2, the quantity of the second OFDM symbol is 12.
In another example please referring to Figure 12, Figure 12 is that the 9th kind of embodiment of radio frames in data transmission method of the present invention is shown
It is intended to.In the present embodiment, uplink and downlink switching cycle is 10ms, and in preceding half of radio frames and rear half of radio frames, subframe
Sequence it is inconsistent, therefore, Figure 12 shows the chronological order of the subframe of entire radio frames, and be followed successively by special subframe,
Sub-frame of uplink, downlink subframe, downlink subframe, downlink subframe, downlink subframe, downlink subframe, downlink subframe, special subframe, uplink
Subframe.
In the present embodiment, the 11st OFDM symbol of two special subframes 91,92 is first in entire radio frames
OFDM symbol, the 12nd OFDM symbol are the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the 14th
A OFDM symbol is the second OFDM symbol.
In the present embodiment, in entire radio frames, first OFDM symbol of a downlink subframe 93 is second
OFDM symbol, and second OFDM symbol is the second OFDM symbol, third OFDM symbol are the second OFDM symbol, the 4th
OFDM symbol is the second OFDM symbol.
Downlink subframe 93 is located at after sub-frame of uplink 94, and continuous in the time domain with sub-frame of uplink 94.In present embodiment
In, the quantity of the first OFDM symbol is 2 in entire radio frames, and the quantity of the second OFDM symbol is 10.
Figure 13 is please referred to, Figure 13 is the tenth kind of embodiment schematic diagram of radio frames in data transmission method of the present invention.With
Second of embodiment of the radio frames in data transmission method of the invention is compared, and present embodiment further increases special son
SRS resource in frame 21 and downlink subframe 22,23 further increases second in special subframe 21 and downlink subframe 22,23
OFDM symbol.
As shown in figure 13, in the present embodiment, in half of radio frames, the tenth OFDM symbol of special subframe 101
For the first OFDM symbol, the 11st OFDM symbol is the second OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol,
13rd OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.I.e. in entire radio frames
In, it is the first OFDM symbol there are two the tenth OFDM symbol of special subframe, the 11st OFDM symbol is the 2nd OFDM symbol
Number, the 12nd OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the 14th OFDM
Symbol is the second OFDM symbol.
In the present embodiment, in half of radio frames, the tenth OFDM symbol of two downlink subframes 102,103 is the
One OFDM symbol, the 11st OFDM symbol are the second OFDM symbol, and the 12nd OFDM symbol is the second OFDM symbol, the tenth
Three OFDM symbols are the second OFDM symbol, and the 14th OFDM symbol is the second OFDM symbol.I.e. in entire radio frames, have
Tenth OFDM symbol of four downlink subframes is the first OFDM symbol, and the 11st OFDM symbol is the second OFDM symbol, the
12 OFDM symbols are the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the 14th OFDM symbol
For the second OFDM symbol.In the present embodiment, the quantity of the first OFDM symbol is 6 in entire radio frames, the second OFDM symbol
Quantity be 24.
Figure 14 is please referred to, Figure 14 is a kind of the tenth embodiment schematic diagram of radio frames in data transmission method of the present invention.
Present embodiment is in data transmission method on the basis of the 8th kind of embodiment of radio frames further in downlink subframe 83
Increase by five the second OFDM symbols.In the present embodiment, in half of radio frames, first of a downlink subframe 113
OFDM symbol is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol, and third OFDM symbol is second
OFDM symbol, third to eight OFDM symbols is the second OFDM symbol.I.e. in entire radio frames, there are two the of downlink subframe
One OFDM symbol is the second OFDM symbol, and second OFDM symbol is the second OFDM symbol, and third OFDM symbol is the
Two OFDM symbols, third to eight OFDM symbols is the second OFDM symbol.In the present embodiment, first in entire radio frames
The quantity of OFDM symbol is 2, and the quantity of the second OFDM symbol is 24.
It is worth noting that can combine to form new embodiment between above-mentioned each embodiment, it is no longer poor herein
It lifts.For example, please referring to Figure 15, Figure 15 is the 12nd kind of embodiment schematic diagram of radio frames in data transmission method of the present invention.
When at least one special subframe is multiple, at least one special subframe includes at least one first special subframe 121 and at least
One the second special subframe 122.
In the present embodiment, the 11st OFDM symbol of the first special subframe 121 be the first OFDM symbol, the 12nd
A OFDM symbol is the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, and the 14th OFDM symbol is the
Two OFDM symbols, the tenth OFDM symbol of the second special subframe 122 are the first OFDM symbol, and the 11st OFDM symbol is the
Two OFDM symbols, the 12nd OFDM symbol are the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the tenth
Four OFDM symbols are the second OFDM symbol.
In the present embodiment, at least one downlink subframe is multiple, at least one downlink subframe include at least one the
One downlink subframe 123 and at least one second downlink subframe 124；
Wherein, the 13rd OFDM symbol of the first downlink subframe 123 is the first OFDM symbol, the 14th OFDM symbol
For the second OFDM symbol,
Tenth OFDM symbol of the second downlink subframe 124 is the first OFDM symbol, and the 11st OFDM symbol is second
OFDM symbol, the 12nd OFDM symbol are the second OFDM symbol, and the 13rd OFDM symbol is the second OFDM symbol, the 14th
A OFDM symbol is the second OFDM symbol.In the present embodiment, the quantity of the first OFDM symbol is 4 in entire radio frames, the
The quantity of two OFDM symbols is 12.
It is worth noting that, in above-mentioned each embodiment, it is preferable that removed in special subframe the first OFDM symbol and
Remaining symbol of second OFDM symbol is used to transmission downlink data, removes the first OFDM symbol and the 2nd OFDM in downlink subframe
Remaining symbol of symbol is used to transmission downlink data, and certainly, remaining symbol is not limited to bearing downlink data, if necessary
Upstream data can be transmitted.
The gain promotion of data transmission method of the present invention is estimated below.
Three kinds of scenes that community user number is about 100,200,500 are analyzed below
Table four compares in radio data transmission method under the embodiment of radio frames, resources loss, the use in difference SRS period
Amount specification estimates BF performance improvement situation, Massive (large-scale) MIMO (Multiple-Input Multiple-
Output, multiple-input and multiple-output) cell average throughput flow gain raising.
The gain when radio frames of the data transmission method of the present invention of table four are above-mentioned each embodiment promotes estimation table.
The calculation method of data in table four is illustrated below.
One, gain promotes calculation method:
The number of users under each scene is multiplied with corresponding performance first, i.e., by each subframe branch under the different SRS periods
The number of users held is multiplied with the number of sub frames of each period assignment.
SRS period as mentioned before performance linear at tetra- kinds of periods of 5ms/10ms/20ms/40ms reduces, successively are as follows: 1,
0.8667、0.7333、0.6。
Such as when community user number is 128 constant, BF performance is obtained by existing radio frames user specification table are as follows:
16*2*1+32*1*0.8667+64*1*0.7333+128*0*0.6=106.67.
The existing radio frames user specification table shown in Fig. 2 of table five
The corresponding user specification table of the first the embodiment radio frames of table six
BF performance is calculated by the first embodiment radio frames:
16*5*1+32*0.5*0.8667+64*0.5*0.7333+128*0*0.6=117.3328
The gain of the relatively existing radio frames of first embodiment are as follows:
(117.3328-106.67)/(106.67) * 100%=10%
If (since each period assignment number of sub frames is larger, calculated actual user's number is greater than setting cell number, by original
The number calculated performance first set).
Two, downlink losses calculation methods:
The OFDM symbol number N0 that can be used for downlink data transmission in Fig. 2 in status frame structure proportion is calculated first (to go
The resource overhead (being calculated by an OFDM symbol) occupied except SRS, CFI, RS)
Such as: when CFI=3, N0=(14-3-1) * 3+14-2-1-4=37 (CFI is less than 3 in special subframe S)
Calculate each OFDM symbol number for implementing to be used for downlink data transmission in embodiment of the present invention:
Such as value N1=(14-3-1) the * 3+14-2-1-4=37 in the first embodiment；
Downlink losses=1-N1/N0=0.
It is the module diagram of data transmission device of the present invention further referring to Figure 16, Figure 16, in the present embodiment, number
It include: data obtaining module 131 and data transmission module 132 according to transmitting device.
Data obtaining module 131 is for obtaining radio frames instruction information.
Data transmission module 132 is used for the radio frames according to indicated by radio frames instruction information and sends or receive data；
Wherein, at least one special subframe of radio frames include one for as the first OFDM symbol of GP and at least three in time domain
On be continuously used for transmission the second OFDM symbol of SRS, the first OFDM symbol and at least three second OFDM symbols are in the time domain
Continuously.
More specifically, radio frames are such as radio frames first in above-mentioned data transmission method in data transmission device of the present invention
Into the 12nd kind of embodiment any one, and radio frames can also for above any one extension embodiment, this
Place repeats no more.Specifically incorporated by reference to Fig. 4-15 refering to first to the 12nd kind of embodiment of radio frames in context data transmission method
And its extension embodiment.
Preferably, data transmission method of the invention and data transmission device are related to UE (user equipment) and E-UTRAN
(Evolved Universal Terrestrial Radio Access (Network), the land the UMTS face wireless access of evolution
(network), i.e., access net) between data transmission.E-UTRAN is the base station expanded by 5 or multiple network elements.
Such as in one embodiment, data transmission device can be user equipment (UE), and the information of user equipment (UE) obtains
Modulus block 131 obtains radio frames from base station E-UTRAN and indicates information, and the data transmission module 132 of user equipment (UE) is according to wireless
Frame indicates that radio frames indicated by information send or receive data.
In another embodiment, data transmission device can be base station E-UTRAN, and the information of base station E-UTRAN obtains
Modulus block 131 obtains radio frames instruction information, the data transmission module of base station E-UTRAN 132 from the configuration information of base station
Data are sent or received according to radio frames indicated by radio frames instruction information.
It is in contrast to the prior art, the present invention includes a use by configuring at least one special subframe of radio frames
In the second OFDM symbol for being continuously used for transmission SRS in the time domain as the first OFDM symbol of GP and at least three, first
OFDM symbol and at least three second OFDM symbols are continuous in the time domain, so as to increase uplink detection signal resource, favorably
In configuring short cycle uplink detection signal in multi-user's cell, wave beam forming performance is improved.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (22)
1. a kind of data transmission method characterized by comprising
It obtains radio frames and indicates information；
Data are sent or received according to radio frames indicated by radio frames instruction information；
Wherein, at least one special subframe of the radio frames includes one for the first orthogonal frequency as protection interval GP
Multiplexing technology OFDM symbol and at least three be continuously used for transmission in the time domain uplink detection signal SRS the 2nd OFDM symbol
Number, first OFDM symbol and at least three second OFDM symbol are continuous in the time domain.
2. the method according to claim 1, wherein
11st OFDM symbol of at least one special subframe is first OFDM symbol, the 12nd OFDM symbol
For second OFDM symbol, the 13rd OFDM symbol is second OFDM symbol, and the 14th OFDM symbol is described
Second OFDM symbol.
3. the method according to claim 1, wherein
Tenth OFDM symbol of at least one special subframe is first OFDM symbol, and the 11st OFDM symbol is
Second OFDM symbol, the 12nd OFDM symbol are second OFDM symbol, and the 13rd OFDM symbol is described the
Two OFDM symbols, the 14th OFDM symbol are second OFDM symbol.
4. method according to claim 1-3, which is characterized in that
At least one downlink subframe of the radio frames include first OFDM symbol and at least one described second
OFDM symbol, one first OFDM symbol and at least one described described second OFDM symbol are continuous in the time domain.
5. according to the method described in claim 4, it is characterized in that,
13rd OFDM symbol of at least one downlink subframe is first OFDM symbol, the 14th OFDM symbol
For second OFDM symbol.
6. according to the method described in claim 4, it is characterized in that,
Tenth OFDM symbol of at least one downlink subframe is first OFDM symbol, and the 11st OFDM symbol is
Second OFDM symbol, the 12nd OFDM symbol are second OFDM symbol, and the 13rd OFDM symbol is described the
Two OFDM symbols, the 14th OFDM symbol are second OFDM symbol.
7. method according to claim 1-3, which is characterized in that
At least one downlink subframe of the radio frames include second OFDM symbol or including it is multiple in the time domain
Continuous second OFDM symbol, one or more of second OFDM symbols and a upper subframe are continuous in the time domain.
8. the method according to the description of claim 7 is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol.
9. the method according to the description of claim 7 is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol, and second OFDM symbol is institute
State the second OFDM symbol.
10. the method according to the description of claim 7 is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol, and second OFDM symbol is institute
The second OFDM symbol is stated, third OFDM symbol is second OFDM symbol.
11. the method according to the description of claim 7 is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol, and second OFDM symbol is institute
The second OFDM symbol is stated, third OFDM symbol is second OFDM symbol, and the 4th OFDM symbol is the 2nd OFDM
Symbol.
12. a kind of data transmission device, which is characterized in that described device includes:
Data obtaining module, for obtaining radio frames instruction information；
Data transmission module sends or receives data for the radio frames according to indicated by radio frames instruction information；
Wherein, at least one special subframe of the radio frames includes one for as the first OFDM symbol of GP and at least three
A the second OFDM symbol for being continuously used for transmission SRS in the time domain, first OFDM symbol and described at least three second
OFDM symbol is continuous in the time domain.
13. device according to claim 12, which is characterized in that
11st OFDM symbol of at least one special subframe is first OFDM symbol, the 12nd OFDM symbol
For second OFDM symbol, the 13rd OFDM symbol is second OFDM symbol, and the 14th OFDM symbol is described
Second OFDM symbol.
14. device according to claim 12, which is characterized in that
Tenth OFDM symbol of at least one special subframe is first OFDM symbol, and the 11st OFDM symbol is
Second OFDM symbol, the 12nd OFDM symbol are second OFDM symbol, and the 13rd OFDM symbol is described the
Two OFDM symbols, the 14th OFDM symbol are second OFDM symbol.
15. the described in any item devices of 2-14 according to claim 1, which is characterized in that
At least one downlink subframe of the radio frames include first OFDM symbol and at least one described second
OFDM symbol, one first OFDM symbol and at least one described described second OFDM symbol are continuous in the time domain.
16. device according to claim 15, which is characterized in that
13rd OFDM symbol of at least one downlink subframe is first OFDM symbol, the 14th OFDM symbol
For second OFDM symbol.
17. device according to claim 15, which is characterized in that
Tenth OFDM symbol of at least one downlink subframe is first OFDM symbol, and the 11st OFDM symbol is
Second OFDM symbol, the 12nd OFDM symbol are second OFDM symbol, and the 13rd OFDM symbol is described the
Two OFDM symbols, the 14th OFDM symbol are second OFDM symbol.
18. the described in any item devices of 2-14 according to claim 1, which is characterized in that
At least one downlink subframe of the radio frames include second OFDM symbol or including it is multiple in the time domain
Continuous second OFDM symbol, one or more of second OFDM symbols and a upper subframe are continuous in the time domain.
19. device according to claim 18, which is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol.
20. device according to claim 18, which is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol, and second OFDM symbol is institute
State the second OFDM symbol.
21. device according to claim 18, which is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol, and second OFDM symbol is institute
The second OFDM symbol is stated, third OFDM symbol is second OFDM symbol.
22. device according to claim 18, which is characterized in that
First OFDM symbol of at least one downlink subframe is second OFDM symbol, and second OFDM symbol is institute
The second OFDM symbol is stated, third OFDM symbol is second OFDM symbol, and the 4th OFDM symbol is the 2nd OFDM
Symbol.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035376A (en) * | 2006-03-03 | 2007-09-12 | 阿尔卡特朗讯 | Method for performing active cancellation of inter-cell interference in a cellular wireless access system |
| CN101848541A (en) * | 2009-03-27 | 2010-09-29 | 大唐移动通信设备有限公司 | Method and device for sending sounding reference signal |
| CN102223726A (en) * | 2011-06-10 | 2011-10-19 | 中兴通讯股份有限公司 | Method and system for sending SRS (survey reference signal) |
| CN102377714A (en) * | 2010-08-12 | 2012-03-14 | 普天信息技术研究院有限公司 | Method and device for enhancing uplink sounding reference signal |
| WO2013058512A1 (en) * | 2011-10-17 | 2013-04-25 | 엘지전자 주식회사 | Method and apparatus for transmitting a frame in a wireless lan system |
| EP2683100A1 (en) * | 2011-03-15 | 2014-01-08 | Huawei Technologies Co., Ltd. | Data transmission method, and device and system thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2458324B (en) * | 2008-03-14 | 2010-12-08 | Toshiba Res Europ Ltd | Wireless communications apparatus |
-
2015
- 2015-07-01 CN CN201510379806.0A patent/CN106330808B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035376A (en) * | 2006-03-03 | 2007-09-12 | 阿尔卡特朗讯 | Method for performing active cancellation of inter-cell interference in a cellular wireless access system |
| CN101848541A (en) * | 2009-03-27 | 2010-09-29 | 大唐移动通信设备有限公司 | Method and device for sending sounding reference signal |
| CN102377714A (en) * | 2010-08-12 | 2012-03-14 | 普天信息技术研究院有限公司 | Method and device for enhancing uplink sounding reference signal |
| EP2683100A1 (en) * | 2011-03-15 | 2014-01-08 | Huawei Technologies Co., Ltd. | Data transmission method, and device and system thereof |
| CN102223726A (en) * | 2011-06-10 | 2011-10-19 | 中兴通讯股份有限公司 | Method and system for sending SRS (survey reference signal) |
| WO2013058512A1 (en) * | 2011-10-17 | 2013-04-25 | 엘지전자 주식회사 | Method and apparatus for transmitting a frame in a wireless lan system |
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