CN103648170B - Data transmission method and data transmission device applied to dual-mode system - Google Patents
Data transmission method and data transmission device applied to dual-mode system Download PDFInfo
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- CN103648170B CN103648170B CN201310747013.0A CN201310747013A CN103648170B CN 103648170 B CN103648170 B CN 103648170B CN 201310747013 A CN201310747013 A CN 201310747013A CN 103648170 B CN103648170 B CN 103648170B
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Abstract
The invention discloses data transmission method and a data transmission device applied to a dual-mode system. The method comprises the following steps: during data transmission in each half frame, sending a first kind of sub frames based on a TD-LTE (Time Division-Long Term Evolution) mechanism; and from the initial time of the first kind of sub frames, through offset in set time, after delaying the sub frames with set number in a second kind of sub frames based on a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) mechanism by N chips, then starting sending the second kind of sub frames, wherein N is a positive integer and is greater than or equal to 8 but less than 16. According to the method, the frame structure of the second kind of sub frames is delayed relative to that of the first kind of sub frames, so that the condition that the DwPTS (Downlink Pilot Time Slot) of the first kind of sub frames is used for carrying data services can be sufficiently ensured, so that the handling capacity of the TD-LTE system is effectively improved. Meanwhile, the TD-LTE and TD-SCDMA share the mode in time, and can support more and agile special sub frame configuration.
Description
Technical field
The present invention relates to the communications field, more particularly, to a kind of data transmission method being applied to dual mode system and device.
Background technology
Dual mode system is to comprise TD SDMA (time division synchronized code
Division multiple access, td-scdma) used frequency range and TD SDMA-Long Term Evolution (td-
Scdma long term evolution, td-lte) used frequency range broadband system.The reception being adopted due to dual mode system
Be shared with sendaisle, therefore can there is interference phenomenon, for example, when td-scdma frequency range is transmission state, td-lte
Frequency range is reception state, and now two frequency range reiving/transmitting states are inconsistent, can there is interference phenomenon.As shown in table 1 for td-lte system
System special subframe allocation list, this form with agreement 36.211 as foundation, in units of sampled point.
Table 1
In order to solve the problems, such as that in dual mode system, td-scdma and td-lte transmitting-receiving occurs interfering with each other when inconsistent, existing
In technology, conventional method is the frame header position by translating td-lte and td-scdma signal transmitted, to ensure above-mentioned two
In frequency range sub-frame of uplink to descending sub frame switch when switching point alignment, and by adjust td-lte frequency range in protecting subframe
(guard period, gp) size avoids interference in the ranks up and down.Although but this method solves td- in dual mode system
Scdma frequency range and td-lte frequency range interference problem in the ranks up and down, but it cannot be guaranteed that in td-scdma frequency range and td-lte frequency range
All subframe ratios can coexist.Meanwhile, the method result in descending pilot frequency subframe in the configuration of td-lte special subframe
(dwpts) longer configuration all can not adopt, thus having influence on the handling capacity of whole system.
For the defect overcoming said method to exist, have also been proposed one kind in prior art and be applied to dual-mode radio frequency and zoom out mould
Subframe configuration method in block (radio remote unit, rru), by selling part dwpts of td-lte system, makes td-
The ascending pilot frequency subframe (uppts) of the dwpts and td-scdma system of lte system is not conflicted, and retains to a certain extent simultaneously
The function of dwpts bearing data service in td-lte system.
As a example td-scdma5:2 and td-lte ascending-descending subframes shown in below by Fig. 1 configure 2 (3:1:1), introduce
The above-mentioned subframe configuration method being applied in bimodulus rru.The ascending-descending subframes of td-scdma are configured to 5:2, represent in every field
In have 5 descending sub frames and 2 sub-frame of uplink.Td-lte sub-frame configuration 2 corresponds to the situation configuring serial number 2 in table 2, represents
There are 3 descending sub frames, 1 sub-frame of uplink and 1 special subframe in every field, wherein, special subframe adopts and configures sequence in table 1
Number for 6 situation.
Table 2
Fig. 2 show the special subframe expanded view of Fig. 1.The frame header position of td-scdma is translated 700 μ s backward it is ensured that
The back boundary of the 2nd sub-frame of uplink of td-scdma is alignd with the back boundary of the 1st sub-frame of uplink of td-lte.Due to td-
The time offset (offset) of scdma is 700 μ s, and the time interval of descending sub frame is 675 μ s, and gp is 275 μ s, td-lte
The time interval of the descending sub frame of (special subframe configuration 6) is 1000 μ s, and the time interval of dwpts isBy calculating, δ=700+675+275-1000-643.23=6.77 μ s, td-scdma's
The back boundary of the back boundary of uppts and the dwpts of td-lte does not simultaneously line up, and the back boundary of the uppts of td-scdma is relative to td-
The back boundary of the dwpts of lte has staggered 6.77 μ s backward.
Fig. 3 show the 9th ofdm symbol expanded view of dwpts of the td-lte of Fig. 2.In order to ensure td-scdma and td-
In lte, ascending-descending subframes do not coexist, and need the 9th symbol of the dwpts to td-lte to do special handling.In view of td-lte's
Radio-frequency receiving-transmitting switch (the switching switch from descending sub frame to the sub-frame of uplink) time is 8 μ s, during the up reception in advance of td-scdma
Between be 6chips=4.6875 μ s, therefore need the dwpts to td-lte the 9th ofdm symbol do truncate process, truncate length
For 8+4.6875-6.77=5.9175 μ s.
So the above-mentioned subframe configuration method being applied in bimodulus rru is assisted by the tail portion signal of truncate dwpts
Adjust and carry industry on the front 8 ofdm symbols in the calibration of td-lte and td-scdma, and the dwpts of the td-lte outside calibration
Business data.In the case of preferable peak speed, due to increased 8 downlink symbol that can be used for scheduling business, can increaseThe downlink throughput capacity of left and right, wherein, conventional subframe can be special with the ofdm symbolic number of bearing data service for 12
Different sub-frame configuration 6 can be with the ofdm symbolic number of bearing data service for 8.
However, as shown in figures 4 a and 4b modulation levels (mcs) be respectively 16 and 14 when, the dwpts tail of td-lte
The td- of (as shown in the line 1 in Fig. 4 a and Fig. 4 b) and non-truncate (as shown in the line 2 in Fig. 4 a and Fig. 4 b) after portion's symbol truncate
Lte simulation figure, this emulation is that bimodulus rru supports that td-lte special subframe is joined under conditions of peak rate
When being set to 9:3:2, the performance loss that the last 6 μ s signal truncates of the 9th ofdm symbol of dwpts of td-lte and not truncate bring.
From Fig. 4 a and Fig. 4 b, after only mcs drops to less than 14, dwpts tail symbol truncate and non-truncate td-lte systematicness
Difference just can be reduced to this acceptable scope of 1～2db.But now actual throughput gain can only achieveWherein, when assuming that uplink scheduling is 96prb, the corresponding tb-size=24496 of mcs14,
The corresponding tb-size=71112 of mcs28.As can be seen here, truncate 6 μ at last ofdm symbol end of dwpts of td-lte
S can largely reduce the downlink throughput capacity gain of td-lte system.
Content of the invention
The embodiment of the present invention provides a kind of data transmission method being applied to dual mode system and device, in order to solve existing skill
Under the downlink throughput capacity gain of the td-lte system leading to because of the tail portion signal of the dwpts of truncate td-lte present in art
The problem of fall.
Concrete technical scheme provided in an embodiment of the present invention is as follows:
In a first aspect, a kind of data transmission method being applied to dual mode system, carry out data transmission in each field
When, comprising:
Send the first kind subframe based on TD SDMA Long Term Evolution td-lte mechanism；
From the beginning of the initial time sending described first kind subframe, after being set time offset, will be based on time division synchronous
After in the Equations of The Second Kind subframe of CDMA td-scdma mechanism, the subframe of setting number postpones n chip backward, then start to send
Described Equations of The Second Kind subframe, wherein, n is positive integer, and 8≤n < 16.
By this implementation, Equations of The Second Kind subframe is made integrally to delay with respect to the frame structure of first kind subframe, thus filling
Divide the dwpts that ensure that first kind subframe to be used for data service to carry, effectively increase the handling capacity of td-lte system, meanwhile,
When making td-lte and td-scdma common mode, it would be preferable to support more more flexible special subframe configurations.
In conjunction with a first aspect, in the first possible implementation, by the Equations of The Second Kind subframe based on td-scdma mechanism
The middle subframe setting number postpones n chip backward, comprising:
Front four subframes in Equations of The Second Kind subframe based on td-scdma mechanism are postponed n chip backward.
By this implementation, using the partial symbols at the 4th subframe end in Equations of The Second Kind subframe, make Equations of The Second Kind
Subframe is integrally delayed.
In conjunction with a first aspect, in the possible implementation of second, by the Equations of The Second Kind subframe based on td-scdma mechanism
The middle subframe setting number postpones n chip backward, comprising:
The subframe setting number in Equations of The Second Kind subframe based on td-scdma mechanism is postponed 8 chips backward.
By this implementation, Equations of The Second Kind subframe is made integrally to have delayed 8 chips with respect to first kind subframe.
In conjunction with a first aspect, in the third possible implementation, described setting time side-play amount is 700 microseconds.
In conjunction with any one possible implementation above-mentioned of first aspect, in the 4th kind of possible implementation, send out
Send described Equations of The Second Kind subframe, comprising:
In the transmission process of described Equations of The Second Kind subframe, the end time of ascending pilot frequency subframe from described Equations of The Second Kind subframe
The first duration forward starts, and starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein, described in described first duration comprises
In Equations of The Second Kind subframe, the end time of ascending pilot frequency subframe is more than the end time of descending pilot frequency subframe in described first kind subframe
The duration part going out, and comprise the duration part of described n chip.
By this implementation it is ensured that all ofdm symbols of the dwpts of first kind subframe could be used for data industry
Business transmission is processed it is not necessary to do truncate.
Second aspect, a kind of data transmission device being applied to dual mode system, comprising:
Communication unit, when carrying out data transmission in each field, long based on TD SDMA for sending
The first kind subframe of phase evolution td-lte mechanism；
Scheduling unit, for, from the beginning of the initial time sending described first kind subframe, after being set time offset, inciting somebody to action
The subframe setting number in Equations of The Second Kind subframe based on TD SDMA td-scdma mechanism postpones n chip backward
Afterwards, then start to send described Equations of The Second Kind subframe, wherein, n is positive integer, and 8≤n < 16.
So, cooperating by said two units, makes the frame structure that Equations of The Second Kind subframe is with respect to first kind subframe
Entirety is delayed, and has fully ensured that the dwpts of first kind subframe is used for data service and carries, has effectively increased gulping down of td-lte system
The amount of telling, simultaneously so that when td-lte and td-scdma common mode, it would be preferable to support more more flexible special subframes configurations.
In conjunction with second aspect, in the first possible implementation, described scheduling unit specifically for:
Front four subframes in Equations of The Second Kind subframe based on td-scdma mechanism are postponed n chip backward.
So, scheduling unit utilizes the partial symbols at the 4th subframe end in Equations of The Second Kind subframe so that Equations of The Second Kind is sub
Frame is integrally delayed.
In conjunction with second aspect, in the possible implementation of second, described scheduling unit specifically for:
The subframe setting number in Equations of The Second Kind subframe based on td-scdma mechanism is postponed 8 chips backward.
So, scheduling unit makes Equations of The Second Kind subframe integrally delay 8 chips with respect to first kind subframe.
In conjunction with second aspect, in the third possible implementation, described scheduling unit specifically for:
Described setting time side-play amount is set to 700 microseconds.
In conjunction with any one possible implementation above-mentioned of second aspect, in the 4th kind of possible implementation, institute
State scheduling unit specifically for:
Send described Equations of The Second Kind subframe, in the transmission process of described Equations of The Second Kind subframe, from described Equations of The Second Kind subframe on
The end time of row pilot tone subframe the first duration forward starts, and starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein,
The end time that described first duration comprises ascending pilot frequency subframe in described Equations of The Second Kind subframe is more descending than in described first kind subframe
The duration part that the end time of pilot tone subframe has more, and comprise the duration part of described n chip.
So, scheduling unit ensure that all ofdm symbols of the dwpts of first kind subframe could be used for data service and pass
Defeated it is not necessary to do truncate process.
The third aspect, a kind of data transmission device being applied to dual mode system, comprising:
Processor, when carrying out data transmission in each field, long-term based on TD SDMA for sending
The first kind subframe of evolution td-lte mechanism；From the beginning of the initial time sending described first kind subframe, it is set time migration
After amount, the subframe setting number in the Equations of The Second Kind subframe based on TD SDMA td-scdma mechanism is postponed n backward
After individual chip, then start to send described Equations of The Second Kind subframe, wherein, n is positive integer, and 8≤n < 16.
So, processor makes Equations of The Second Kind subframe integrally delay with respect to the frame structure of first kind subframe, fully ensures that
The dwpts of first kind subframe is used for data service and carries, and effectively increases the handling capacity of td-lte system, simultaneously so that td-
When lte and td-scdma common mode, it would be preferable to support more more flexible special subframe configurations.
In conjunction with the third aspect, in the first possible implementation, described processor specifically for:
Front four subframes in Equations of The Second Kind subframe based on td-scdma mechanism are postponed n chip backward.
So, processor utilizes the partial symbols at the 4th subframe end in Equations of The Second Kind subframe so that Equations of The Second Kind subframe
Entirety is delayed.
In conjunction with the third aspect, in the possible implementation of second, described processor specifically for:
The subframe setting number in Equations of The Second Kind subframe based on td-scdma mechanism is postponed 8 chips backward.
So, processor makes Equations of The Second Kind subframe integrally delay 8 chips with respect to first kind subframe.
In conjunction with the third aspect, in the third possible implementation, described processor specifically for:
Described setting time side-play amount is set to 700 microseconds.
In conjunction with any one possible implementation above-mentioned of the third aspect, in the 4th kind of possible implementation, institute
State processor specifically for:
Send described Equations of The Second Kind subframe, in the transmission process of described Equations of The Second Kind subframe, from described Equations of The Second Kind subframe on
The end time of row pilot tone subframe the first duration forward starts, and starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein,
The end time that described first duration comprises ascending pilot frequency subframe in described Equations of The Second Kind subframe is more descending than in described first kind subframe
The duration part that the end time of pilot tone subframe has more, and comprise the duration part of described n chip.
So, processor ensure that all ofdm symbols of the dwpts of first kind subframe could be used for data traffic transmission,
Do not need to do truncate process.
Brief description
Fig. 1 be prior art under td-scdma5:2 and td-lte ascending-descending subframes configure 2(3:1:1) configuration figure；
Fig. 2 is the special subframe expanded view of td-lte ascending-descending subframes configuration 2 under prior art；
Fig. 3 is the 9th ofdm symbol expanded view of dwpts of td-lte ascending-descending subframes configuration 2 under prior art；
The performance simulation that Fig. 4 a is the subframe configuration method being applied in bimodulus rru when 16 for prior art modulated grade
Figure；
The performance simulation that Fig. 4 b is the subframe configuration method being applied in bimodulus rru when 14 for prior art modulated grade
Figure；
Fig. 5 is the flow chart being applied in the embodiment of the present invention carry out data transmission in dual mode system；
Fig. 6 is the conventional subframe structure chart of td-scdma mechanism in the embodiment of the present invention；
Fig. 7 is that the special subframe of td-scdma5:2 and td-lte ascending-descending subframes configuration 2 in the embodiment of the present invention launches
Figure；
Fig. 8 is that in the embodiment of the present invention, td-scdma5:2 and td-lte ascending-descending subframes configuration 2 switching point launches to illustrate
Figure；
Fig. 9 is the first structure figure of the data transmission device being applied to dual mode system in the embodiment of the present invention；
Figure 10 is the second structure chart of the data transmission device being applied to dual mode system in the embodiment of the present invention.
Specific embodiment
In order to solve in prior art for so that the uplink and downlink timeslot of td-scdma and td-lte is coexisted and truncate td-
The tail portion symbol of the dwpts of lte, thus affecting the problem of the throughput of system of td-lte, in the embodiment of the present invention, provides
A kind of data transmission method being applied to dual mode system and device.
Below in conjunction with the accompanying drawings the preferred embodiment of the present invention is described in detail.
Refering to shown in Fig. 5, in the embodiment of the present invention, it is applied to the idiographic flow carrying out data transmission in dual mode system such as
Under:
Step 500: send the first kind subframe based on td-lte mechanism.
In the embodiment of the present invention, carried out in units of field in the data transfer in dual mode system.
Step 510: from the beginning of the initial time sending first kind subframe, after being set time offset, will be based on td-
After in the Equations of The Second Kind subframe of scdma mechanism, the subframe of setting number postpones n chip (chips) backward, then start to send second
Class subframe, wherein, n is positive integer, and 8≤n < 16.
In the embodiment of the present invention, setting time side-play amount is traditionally arranged to be 700 μ s.
It is preferred that in the embodiment of the present invention, when sending the Equations of The Second Kind subframe based on td-scdma mechanism, can by this
Front four subframes in two class subframes postpone n chips backward and are transmitted.Fig. 6 shows the routine of td-scdma mechanism
Subframe structure, each conventional subframe is made up of 864chips, when a length of 675 μ s, wherein, business and signaling data are by two block number evidences
Block forms, and each data block is made up of 352chips respectively, and training sequence (midamble) is made up of 144chips, and at each
The afterbody of conventional subframe has the gp of 16 chips.In the embodiment of the present invention, exactly make use of the gp's at the 4th subframe end
N chips in 16 chips, by Equations of The Second Kind subframe, from frame header position, front four subframes have integrally elapsed n backward
Chips, makes first kind subframe and Equations of The Second Kind subframe staggers n chips on time template.
It is preferred that in the embodiment of the present invention, the optimal value of n is 8, that is, when sending Equations of The Second Kind subframe, by this Equations of The Second Kind
The subframe setting number in subframe postpones 8 chips backward.
Then, in the embodiment of the present invention, in the transmission process of Equations of The Second Kind subframe, uppts from this Equations of The Second Kind subframe
End time the first duration forward starts, and just starts to execute descending sub frame to the conversion of sub-frame of uplink, wherein, this first duration
Contain the duration that the end time that end time of the uppts in Equations of The Second Kind subframe is than the dwpts in first kind subframe has more
Part, and contain the duration part of this n chip.
In actual applications, td-scdma5:2 and td-lte adopts ascending-descending subframes configuration 2(special subframe configuration 6) be
A kind of the most frequently used configuration, below, taking this configuration as a example, above-described embodiment is further detailed
Refering to the first kind subframe (hereinafter referred to as tdl subframe) shown in Fig. 7, first sending based on td-lte mechanism, through 700
After the time offset of μ s, using the 4th in the Equations of The Second Kind subframe (hereinafter referred to as tds subframe) based on td-scdma mechanism
Receive and dispatch 8 chips in 16 chips of transfer point at subframe end, front four subframes of tds subframe are integrally postponed backward
8chips(6.25 μ s) after just start send, be equivalent to, during the transmission of front four subframes of the tds subframe in the embodiment of the present invention
Between elapsed 700+6.25=706.25 μ backward compared to the transmission time of front four subframes of the tds subframe under prior art
At 4th subframe end of the tds subframe in s, the wherein embodiment of the present invention, remaining 8chips is sufficiently used for receiving and dispatching putting and cuts
Change.
Refering to shown in Fig. 8, after front four subframes 8 chips of overall delay backward of tds subframe, the reality of tds subframe
Border time offset is 706.25 μ s, and the time interval of tds descending sub frame is 675 μ s, and gp is 275 μ s, tdl descending sub frame when
Between be spaced apart 1000 μ s, the time interval of dwpts isWhen, so the reality of the uppts in tds subframe
The physical end time than the dwpts in tdl subframe for the border end time has elapsed 706.25+675+275-1000- backward
643.23=13.02 μ s.Because the radio-frequency receiving-transmitting switch time of tdl subframe is 8 μ s, tds subframe uplink receives the time in advance and is
4.6875 μ s, by calculate, the 9th in the dwpts of tdl subframe ofdm symbol end apart from radio-frequency receiving-transmitting switch when
Between between be spaced apart 13.02-8-4.6875=0.3325 μ s ＞ 0, the therefore end of uppts from tds subframe for the tdl subframe
Time, 13.02 μ s forward started, and just successful execution can be switched to the operation of sub-frame of uplink it is no longer necessary to truncate from descending sub frame
The tail symbol of dwpts is used for ascending-descending subframes and changes, and dwpts all of ofdm symbol may be used to bearing data service,
Thus substantially remaining the data service function of the dwpts of tdl subframe, improve the handling capacity of td-lte system.
Based on above-described embodiment, refering to shown in Fig. 9, in the embodiment of the present invention, it is applied to the data transfer dress of dual mode system
Put including:
Communication unit 900, when carrying out data transmission in each field, for sending first based on td-lte mechanism
Class subframe.
Scheduling unit 901, for, from the beginning of the initial time sending first kind subframe, after being set time offset, inciting somebody to action
Postponed backward after n chip based on the subframe setting number in the Equations of The Second Kind subframe of td-scdma mechanism, then start to send this
Two class subframes, wherein, n is positive integer, and 8≤n < 16.
Scheduling unit 901 is specifically for by front four subframes in the Equations of The Second Kind subframe based on td-scdma mechanism backward
Postpone n chip.
Scheduling unit 901 specifically for, by the Equations of The Second Kind subframe based on td-scdma mechanism set number subframe to
Postpone 8 chips afterwards.
Scheduling unit 901 is specifically for being set to 700 microseconds by setting time side-play amount.
Scheduling unit 901 is specifically for sending Equations of The Second Kind subframe, in the transmission process of this Equations of The Second Kind subframe, from second
In class subframe, the first duration forward starts the end time of uppts, starts to execute descending sub frame to the conversion of sub-frame of uplink, its
In, the end time than dwpts in first kind subframe end time that this first duration comprises uppts in Equations of The Second Kind subframe has more
Duration part, and the duration part comprising this n chip.
Based on a kind of data transmission method being applied to dual mode system provided in an embodiment of the present invention, the embodiment of the present invention is also
Provide the data transmission device that another kind is applied to dual mode system, refering to shown in Figure 10, this device includes: processor 100, its
In
Processor 100, when carrying out data transmission in each field, for sending the first kind based on td-lte mechanism
Subframe；From the beginning of the initial time sending first kind subframe, after being set time offset, by the based on td-scdma mechanism
After in two class subframes, the subframe of setting number postpones n chip backward, then start to send Equations of The Second Kind subframe, wherein, n is just whole
Number, and 8≤n < 16.
Processor 100 is specifically for prolonging front four subframes in the Equations of The Second Kind subframe based on td-scdma mechanism backward
N chip late.
Processor 100 is specifically for by the subframe setting number in the Equations of The Second Kind subframe based on td-scdma mechanism backward
Postpone 8 chips.
Processor 100 is specifically for being set to 700 microseconds by setting time side-play amount.
Processor 100 is specifically for sending Equations of The Second Kind subframe, in the transmission process of Equations of The Second Kind subframe, from Equations of The Second Kind
In frame, the first duration forward starts the end time of uppts, starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein,
The end time than dwpts in first kind subframe for the end time that this first duration comprises uppts in Equations of The Second Kind subframe has more
Duration part, and comprise the duration part of this n chip.
In sum, in the embodiment of the present invention, using 16 of transmitting-receiving transfer point at the 4th subframe end in tds subframe
8 chips in individual chips gp, the time template of tdl subframe and tds subframe common mode have been staggered 8chips, have made tds subframe
Integrally delaying with respect to the frame structure of tdl subframe, thus having fully ensured that the dwpts of tdl subframe is used for data service carrying, having
Effect improves the handling capacity of td-lte system.In addition, this data transmission method is so that when td-lte and td-scdma common mode,
Can support that more more flexible special subframes configure.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the embodiment of the present invention
The spirit and scope of bright embodiment.So, if these modifications of the embodiment of the present invention and modification belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to comprise these changes and modification.
Claims (12)
1. a kind of data transmission method being applied to dual mode system is it is characterised in that carry out data transmission in each field
When, comprising:
Send the first kind subframe based on TD SDMA Long Term Evolution td-lte mechanism；
From the beginning of the initial time sending described first kind subframe, after being set time offset, will be based on time division synchronous code division
After in the Equations of The Second Kind subframe of multiple access td-scdma mechanism, the subframe of setting number postpones n chip backward, then it is described to start transmission
Equations of The Second Kind subframe, in the transmission process of described Equations of The Second Kind subframe, the end of ascending pilot frequency subframe from described Equations of The Second Kind subframe
Time the first duration forward starts, and starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein, described first duration comprises
In described Equations of The Second Kind subframe the end time of ascending pilot frequency subframe than descending pilot frequency subframe in described first kind subframe at the end of
Between the duration part that has more, and the duration part comprising described n chip；Wherein, n is positive integer, and 8≤n < 16.
2. the method for claim 1 is it is characterised in that number will be set in the Equations of The Second Kind subframe based on td-scdma mechanism
Purpose subframe postpones n chip backward, comprising:
Front four subframes in Equations of The Second Kind subframe based on td-scdma mechanism are postponed n chip backward.
3. the method for claim 1 is it is characterised in that number will be set in the Equations of The Second Kind subframe based on td-scdma mechanism
Purpose subframe postpones n chip backward, comprising:
The subframe setting number in Equations of The Second Kind subframe based on td-scdma mechanism is postponed 8 chips backward.
4. the method for claim 1 is it is characterised in that described setting time side-play amount is 700 microseconds.
5. a kind of data transmission device being applied to dual mode system is it is characterised in that include:
Communication unit, when carrying out data transmission in each field, is drilled based on TD SDMA for a long time for sending
Enter the first kind subframe of td-lte mechanism；
Scheduling unit, for, from the beginning of the initial time sending described first kind subframe, after being set time offset, being based on
After in the Equations of The Second Kind subframe of TD SDMA td-scdma mechanism, the subframe of setting number postpones n chip backward, then
Start to send described Equations of The Second Kind subframe, in the transmission process of described Equations of The Second Kind subframe, up from described Equations of The Second Kind subframe lead
The end time of frequency subframe the first duration forward starts, and starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein, described
First duration comprises the end time of ascending pilot frequency subframe in described Equations of The Second Kind subframe than descending pilot frequency in described first kind subframe
The duration part that the end time of subframe has more, and comprise the duration part of described n chip；Wherein, n is positive integer, and 8
≤n<16.
6. device as claimed in claim 5 it is characterised in that described scheduling unit specifically for:
Front four subframes in Equations of The Second Kind subframe based on td-scdma mechanism are postponed n chip backward.
7. device as claimed in claim 5 it is characterised in that described scheduling unit specifically for:
The subframe setting number in Equations of The Second Kind subframe based on td-scdma mechanism is postponed 8 chips backward.
8. device as claimed in claim 5 it is characterised in that described scheduling unit specifically for:
Described setting time side-play amount is set to 700 microseconds.
9. a kind of data transmission device being applied to dual mode system is it is characterised in that include:
Processor, when carrying out data transmission in each field, is based on TD SDMA Long Term Evolution for sending
The first kind subframe of td-lte mechanism；From the beginning of the initial time sending described first kind subframe, after being set time offset,
The subframe setting number in Equations of The Second Kind subframe based on TD SDMA td-scdma mechanism is postponed n chip backward
Afterwards, then start to send described Equations of The Second Kind subframe；In the transmission process of described Equations of The Second Kind subframe, from described Equations of The Second Kind subframe on
The end time of row pilot tone subframe the first duration forward starts, and starts to execute descending sub frame to the conversion of sub-frame of uplink；Wherein,
The end time that described first duration comprises ascending pilot frequency subframe in described Equations of The Second Kind subframe is more descending than in described first kind subframe
The duration part that the end time of pilot tone subframe has more, and comprise the duration part of described n chip；Wherein, n is just whole
Number, and 8≤n < 16.
10. device as claimed in claim 9 it is characterised in that described processor specifically for:
Front four subframes in Equations of The Second Kind subframe based on td-scdma mechanism are postponed n chip backward.
11. devices as claimed in claim 9 it is characterised in that described processor specifically for:
The subframe setting number in Equations of The Second Kind subframe based on td-scdma mechanism is postponed 8 chips backward.
12. devices as claimed in claim 9 it is characterised in that described processor specifically for:
Described setting time side-play amount is set to 700 microseconds.
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| WO2011062921A1 (en) * | 2009-11-17 | 2011-05-26 | Qualcomm Incorporated | Subframe dependent transmission mode in lte-advanced |
| CN102695280A (en) * | 2012-06-26 | 2012-09-26 | 华为技术有限公司 | System-compatible data frame conversion method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011062921A1 (en) * | 2009-11-17 | 2011-05-26 | Qualcomm Incorporated | Subframe dependent transmission mode in lte-advanced |
| CN102668668A (en) * | 2009-11-17 | 2012-09-12 | 高通股份有限公司 | Subframe dependent transmission mode in LTE-advanced |
| CN102695280A (en) * | 2012-06-26 | 2012-09-26 | 华为技术有限公司 | System-compatible data frame conversion method and device |
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