CN106656421B - Demodulation method, demodulating equipment and the terminal of downlink data - Google Patents
Demodulation method, demodulating equipment and the terminal of downlink data Download PDFInfo
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- CN106656421B CN106656421B CN201611270284.1A CN201611270284A CN106656421B CN 106656421 B CN106656421 B CN 106656421B CN 201611270284 A CN201611270284 A CN 201611270284A CN 106656421 B CN106656421 B CN 106656421B
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- control information
- downlink control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
Abstract
The present invention provides a kind of demodulation method of downlink data, the demodulating equipment of downlink data and terminals, when the demodulation method of downlink data includes: the dispatch terminal in target first kind TTI, the first exclusive Downlink Control Information, the second exclusive Downlink Control Information and downlink data that base station is sent are received；It detects whether correctly demodulate the second exclusive Downlink Control Information；When determination correctly can not demodulate the second exclusive Downlink Control Information, according to the first exclusive Downlink Control Information and the exclusive Downlink Control Information of target second, actual downstream needed for determining terminal controls information, and the exclusive Downlink Control Information of target second includes the second exclusive Downlink Control Information that at least one first kind TTI dispatch terminal has correctly demodulated in the process；Downlink data is demodulated based on actual downstream control information.According to the technical solution of the present invention, the probability that can reduce the re-transmission of sTTI data, avoids unnecessary extra latency.
Description
Technical field
The present invention relates to fields of communication technology, demodulation method, a kind of lower line number in particular to a kind of downlink data
According to demodulating equipment and a kind of terminal.
Background technique
In current LTE (Long Term Evolution, long term evolution) system, downlink that base station is sent to terminal
Deta bearer is PDSCH (Physical Downlink Shared Channel, physical layer descending share channel), with the downlink
Data it is corresponding there are also with the PDSCH at same TTI (Transmission Time Interval, transmission time interval)
It is sent on the PDCCH (Physical Downlink Control Channel, physical layer descending control channel) of middle transmission
DCI (Downlink Control Information, Downlink Control Information).DCI be used to indicate the terminal demodulation it is corresponding under
Various information needed for row data, such as RB locating for downlink data (Resource Block, resource module), the modulation that uses
Coded format, redundancy versions etc..Terminal receives PDCCH first and attempts to demodulate, when correctly demodulating the DCI information in PDCCH
Afterwards, the data information of the PDSCH in received same TTI is demodulated using the DCI information.
However in some cases, such as channel burst interferes etc., in fact it could happen that the case where terminal cannot be demodulated correctly.If
Terminal fails the downlink data information for correctly demodulating corresponding PDSCH after demodulating DCI, then can be to base station feedback NACK
(Negative Acknowledgment, negative acknowledge), if correct demodulation, terminal is to base station feedback ACK, if terminal cannot
DCI information (correspondingly, terminal can not also demodulate PDSCH) in correct demodulation PDCCH, then terminal will be to base station feedback DTX
(Discontinuous Transmission, uninterrupted to send).If base station receives NACK, learn that the data information of terminal connects
Mistake is received, the re-transmission of downlink data can be initiated at the time of next suitable, re-transmission generally will use new redundancy versions.If base
Station receives DTX, learns that terminal D CI receives mistake, then can send again data in next proper timing.It, can when data pass again
The processing that PDCCH channel power can be enhanced, to guarantee the demodulation performance of PDCCH, in addition, the redundancy versions for passing data again can
Can be identical as the redundancy versions that last data are transmitted, no replacement is required new redundancy versions.
With the development of mobile internet, the applied business for largely meeting various specific functions has been emerged.It is some of
Business is lower to data delay requirement, such as receiving and dispatching mail, downloading film etc.；But separately there are some business to have strictly data delay
Requirement, such as network on-line game, rush to purchase, rob red packet etc., the time delay that this kind of business is usually required user data to the greatest extent may be used
Can it is short.In the lte networks, transmission time interval TTI is the important indicator for influencing user data delay.Current LTE system
The TTI (hereinafter referred to as legacy TTI) of use is 1ms namely subframe, and the every 1ms of transmitting terminal sends a data block, connects
Receiving end can one data block of every 1ms reception.
In 3GPP RAN#69 plenary session to being set up the project in the lte networks using the project of shorter TTI, research is used
The feasibility of the TTI (short-TTI is hereinafter sTTI, such as 0.5ms etc.) of shorter duration and possible beneficial effect
Fruit.The reduction for having studied TTI duration for having some documents for example [R1-160942] [R1-160930] quantitative at present is to LTE data
The influence of time delay, analysis shows that, using sTTI be not merely base station, terminal transmission time interval shorten, correspondingly, with this
Sending the corresponding data processing time in interval can also decrease, such as data code modulation and data demodulation time all can
It is reduced with the reduction of data block size.In the LTE network of later release it is possible that using legacy TTI with
The case where two kinds of the sTTI UE (User Equipment, user terminal) for sending interval coexist.And it is drawn in LTE system radio resource
On point, it is also possible to there is a part of frequency resource using legacy TTI, and another part frequency resource uses sTTI.One
Multiple sTTI are may included in legacy TTI duration.
In the lte networks, for flexible adaptive scheduling, each legacy TTI can have the downlink for the TTI
Control information.Downlink Control Information is carried on preceding n OFDM (the Orthogonal Frequency of whole system bandwidth
Division Multiplexing, orthogonal frequency division multiplexing) (n is 1~4, is had according to specific system configuration value in symbol
Institute is different), it include for the common downlink control information of all UE of cell and respectively for the exclusive downlink control of UE of each UE
Information processed.Wherein, common control information mainly includes indicating that control channel resource occupies the information of OFDM symbol quantity and (is carried on
PCFICH (Physical Control Format Indicator Channel, Physical Control Format Indicator Channel)), for
The HARQ ACK/NACK feedback information of upstream data (is carried on PHICH (Physical Hybrid ARQ Indicator
Channel, physical mixed automatic re-transmission indicating channel)), paging, random access response, broadcast message etc. (are carried on PDCCH letter
Road is mapped in public search space) relevant control information.The exclusive Downlink Control Information of UE mainly includes the time-frequency money of UE distribution
Source, modulating-coding format, HARQ (Hybrid Automatic Repeat reQuest, mixed automatic retransfer agreement) process number,
Ascending frequency-hopping, uplink power control information etc. (are carried on PDCCH channel, be generally mapped in the exclusive search space UE).It is using
In the resource of sTTI, if also designed using down control channel identical with legacy TTI, i.e., each sTTI has respectively
Independent Downlink Control Information includes common downlink control information and the exclusive Downlink Control Information of UE.Then section at the same time
The Downlink Control Information resource overhead of interior sTTI by be legacy TTI the more times of (durations depending on legacy TTI and sTTI
Multiple proportion).Excessive Downlink Control Information resource overhead will affect the data transmission efficiency of sTTI, it is difficult to play sTTI reduction
The effect of time delay.
In the related technology, in order to solve the above problem using the design of two layers of control information, this method will use the UE of sTTI
Exclusive control information be divided at a slow speed with quick two levels, as shown in Figure 1, at a slow speed control information be carried on legacy downlink control
In channel resource processed, several preceding OFDM symbols of each sTTI are set as sPDCCH channel resource, are somebody's turn to do for carrying to use
The exclusive fast downlink of the UE of sTTI resource controls information.It is needed using the UE of sTTI according to control information at a slow speed and quickly control
The actual Downlink Control Information of information acquisition.Due to need to only update quickly control information in each sTTI, reduce in sTTI
Control information overhead, while meeting the dispatching flexibility in sTTI again.
In this design method for using two layers of control information, terminal needs to obtain in conjunction with information is controlled at a slow speed and quickly
Obtain complete Downlink Control Information.If it is correct and quick that control information demodulation at a slow speed when receiving control information, occurs in terminal
The situation of information demodulation mistake is controlled, terminal may directly be abandoned in demodulation sTTI since Downlink Control Information demodulates mistake
Data information, to base station feedback DTX.Base station can send again the data information to terminal in next suitable sTTI, eventually
End needs to wait for a period of time to be likely to be assigned passes resource again, and this processing mode can bring biggish time delay, in this regard, at present
There are no effective solution schemes.
Summary of the invention
The present invention is based at least one above-mentioned technical problem, proposes a kind of demodulation scheme of new downlink data,
The probability that can reduce the re-transmission of sTTI data, avoids unnecessary extra latency.
In view of this, being used for terminal, comprising: in target first the invention proposes a kind of demodulation method of downlink data
When dispatching the terminal in class TTI, the first exclusive Downlink Control Information, the second exclusive Downlink Control Information that base station is sent are received
And downlink data, wherein the first exclusive Downlink Control Information is carried in the down control channel resources of the second class TTI,
The second exclusive Downlink Control Information is carried in the down control channel resources of the target first kind TTI, and described second
Class TTI includes multiple first kind TTI, and the target first kind TTI is any first kind TTI；Detecting whether can be correct
Demodulate the described second exclusive Downlink Control Information；When determination correctly can not demodulate the second exclusive Downlink Control Information, root
According to the described first exclusive Downlink Control Information and the exclusive Downlink Control Information of target second, reality needed for determining the terminal
Downlink Control Information, wherein the exclusive Downlink Control Information of the target second includes at least one first kind TTI scheduling institute
State the exclusive Downlink Control Information of second correctly demodulated in terminal procedures；Based on actual downstream control information to described
Downlink data is demodulated.
In the technical scheme, in the target first kind TTI when dispatch terminal, under the first of receivable base station transmission is exclusive
Row control information, the second exclusive Downlink Control Information and downlink data, and it is exclusive by detecting whether can correctly to demodulate second
Downlink Control Information, when determination correctly can not demodulate the second exclusive Downlink Control Information, according to the first exclusive downlink control letter
Breath and the exclusive Downlink Control Information of target second (wherein, the exclusive Downlink Control Information of target second include at least one first
The the second exclusive Downlink Control Information correctly demodulated during class TTI dispatch terminal), actual downstream needed for determining terminal
Information is controlled, since the time interval of first kind TTI (i.e. sTTI) is shorter, under the second of the adjacent sTTI of same terminal is exclusive
The correlation of row control information is stronger, in the case that second exclusive Downlink Control Information of the terminal in this sTTI demodulates mistake,
Replace failing in this sTTI correctly demodulate second specially using the exclusive control information of second in the adjacent sTTI correctly demodulated
Belong to control information to put to increase the probability for correctly demodulating the downlink data in this sTTI compared to terminal in the related technology
The demodulation of this sTTI downlink data, the directly way to base station feedback DTX are abandoned, the re-transmission for significantly reducing sTTI data is general
Rate, while terminal abandons the demodulation of this sTTI downlink data in the related technology, directly needs to this process of base station feedback DTX
There is the regular hour, terminal can efficiently use this period according to the first exclusive Downlink Control Information and target in this programme
Two exclusive Downlink Control Information determine that actual downstream controls information, and are solved based on actual downstream control information to downlink data
It adjusts, so extra latency will not be generated.
In the above-mentioned technical solutions, it is preferable that the exclusive Downlink Control Information of the target second is specified first kind TTI tune
Spend the exclusive Downlink Control Information of second correctly demodulated in the terminal procedures, wherein the specified first kind TTI be away from
From the target first kind TTI time shortest TTI.
In the technical scheme, it is contemplated that each sTTI of same terminal is more adjacent in time, the second exclusive downlink control
The correlation of information processed is stronger, thus by during distance objective first kind TTI time shortest TTI dispatch terminal just
The exclusive Downlink Control Information of second really demodulated increases correct to a greater extent as the exclusive Downlink Control Information of target second
Demodulate the probability of the downlink data in this sTTI.
In any of the above-described technical solution, it is preferable that further include: it can correctly demodulate the described second exclusive downlink control
In the case where information processed, according to the described first exclusive Downlink Control Information and the second exclusive Downlink Control Information, determine
The actual downstream controls information.
In the technical scheme, in the case where correctly the second exclusive Downlink Control Information can be demodulated, according to
One exclusive Downlink Control Information and the second exclusive Downlink Control Information determine that actual downstream controls information, reduce in sTTI
Control information overhead, while meeting the dispatching flexibility in sTTI again.
In any of the above-described technical solution, it is preferable that further include: information is controlled based on the actual downstream detecting
When demodulating failure to the downlink data, the base station Xiang Suoshu sends DTX information.
In the technical scheme, when demodulating failure to downlink data, by sending DTX information to base station, to obtain again
Take related control information, it is ensured that terminal can effectively parse downlink data.
According to the second aspect of the invention, a kind of demodulating equipment of downlink data is proposed, terminal is used for, comprising: is received
Unit, when for dispatching the terminal in target first kind TTI, the first exclusive Downlink Control Information of reception base station transmission,
Second exclusive Downlink Control Information and downlink data, wherein the first exclusive Downlink Control Information is carried on second class
In the down control channel resources of TTI, the second exclusive Downlink Control Information is carried on the downlink of the target first kind TTI
In control channel resource, the second class TTI includes multiple first kind TTI, and the target first kind TTI is any described first
Class TTI；Detection unit, for detecting whether the described second exclusive Downlink Control Information can be demodulated correctly；Determination unit is used for
When the detection unit determination correctly can not demodulate the second exclusive Downlink Control Information, according to TTI pairs of the first kind
The exclusive Downlink Control Information of first answered and the exclusive Downlink Control Information of target second, under reality needed for determining the terminal
Row control information, wherein the exclusive Downlink Control Information of the target second includes described at least one described first kind TTI scheduling
The exclusive Downlink Control Information of second correctly demodulated in terminal procedures；Demodulating unit, for being based on the actual downstream control
Information processed demodulates the downlink data.
In the technical scheme, in the target first kind TTI when dispatch terminal, under the first of receivable base station transmission is exclusive
Row control information, the second exclusive Downlink Control Information and downlink data, and it is exclusive by detecting whether can correctly to demodulate second
Downlink Control Information, when determination correctly can not demodulate the second exclusive Downlink Control Information, according to the first exclusive downlink control letter
Breath and the exclusive Downlink Control Information of target second (wherein, the exclusive Downlink Control Information of target second include at least one first
The the second exclusive Downlink Control Information correctly demodulated during class TTI dispatch terminal), actual downstream needed for determining terminal
Information is controlled, since the time interval of first kind TTI (i.e. sTTI) is shorter, under the second of the adjacent sTTI of same terminal is exclusive
The correlation of row control information is stronger, in the case that second exclusive Downlink Control Information of the terminal in this sTTI demodulates mistake,
Replace failing in this sTTI correctly demodulate second specially using the exclusive control information of second in the adjacent sTTI correctly demodulated
Belong to control information to put to increase the probability for correctly demodulating the downlink data in this sTTI compared to terminal in the related technology
The demodulation of this sTTI downlink data, the directly way to base station feedback DTX are abandoned, the re-transmission for significantly reducing sTTI data is general
Rate, while terminal abandons the demodulation of this sTTI downlink data in the related technology, directly needs to this process of base station feedback DTX
There is the regular hour, terminal can efficiently use this period according to the first exclusive Downlink Control Information and target in this programme
Two exclusive Downlink Control Information determine that actual downstream controls information, and are solved based on actual downstream control information to downlink data
It adjusts, so extra latency will not be generated.
In the above-mentioned technical solutions, it is preferable that the exclusive Downlink Control Information of the target second is specified first kind TTI tune
Spend the exclusive Downlink Control Information of second correctly demodulated in the terminal procedures, wherein the specified first kind TTI be away from
From the target first kind TTI time shortest TTI.
In the technical scheme, it is contemplated that each sTTI of same terminal is more adjacent in time, the second exclusive downlink control
The correlation of information processed is stronger, thus by during distance objective first kind TTI time shortest TTI dispatch terminal just
The exclusive Downlink Control Information of second really demodulated increases correct to a greater extent as the exclusive Downlink Control Information of target second
Demodulate the probability of the downlink data in this sTTI.
In any of the above-described technical solution, it is preferable that the determination unit is also used to correctly demodulate described
In the case where two exclusive Downlink Control Information, according to the described first exclusive Downlink Control Information and the second exclusive downlink control
Information processed determines the actual downstream control information.
In the technical scheme, in the case where correctly the second exclusive Downlink Control Information can be demodulated, according to
One exclusive Downlink Control Information and the second exclusive Downlink Control Information determine that actual downstream controls information, reduce in sTTI
Control information overhead, while meeting the dispatching flexibility in sTTI again.
In any of the above-described technical solution, it is preferable that further include: transmission unit, for detecting based on the reality
When border Downlink Control Information demodulates failure to the downlink data, the base station Xiang Suoshu sends DTX information.
In the technical scheme, when demodulating failure to downlink data, by sending DTX information to base station, to obtain again
Take related control information, it is ensured that terminal can effectively parse downlink data.
According to the third aspect of the invention we, it is also proposed that a kind of terminal, comprising: as described in any one of above-mentioned technical proposal
Downlink data demodulating equipment.
By above technical scheme, it can reduce the probability of sTTI data re-transmission, avoid unnecessary extra latency.
Detailed description of the invention
Fig. 1 shows the schematic diagram of the resource allocation of down control channel in the related technology；
Fig. 2 shows the schematic flow diagrams of the demodulation method of the downlink data of embodiment according to the present invention；
Fig. 3 shows the schematic block diagram of the demodulating equipment of the downlink data of embodiment according to the present invention；
Fig. 4 shows the schematic block diagram of the terminal of embodiment according to the present invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 2 shows the schematic flow diagrams of the demodulation method of the downlink data of embodiment according to the present invention.
As shown in Fig. 2, the demodulation method of the downlink data of embodiment according to the present invention, is used for terminal, comprising:
Step 202, when dispatching the terminal in target first kind TTI, the first exclusive downlink control that base station is sent is received
Information, the second exclusive Downlink Control Information and downlink data processed, wherein the first exclusive Downlink Control Information is carried on second
In the down control channel resources of class TTI, the second exclusive Downlink Control Information is carried under the target first kind TTI
In row control channel resource, the second class TTI includes multiple first kind TTI, and the target first kind TTI is any described the
A kind of TTI.
Step 204, it detects whether correctly demodulate the described second exclusive Downlink Control Information.
Step 206, exclusive according to described first when determination correctly can not demodulate the second exclusive Downlink Control Information
Downlink Control Information and the exclusive Downlink Control Information of target second, actual downstream needed for determining the terminal control information,
Wherein, the exclusive Downlink Control Information of the target second includes that at least one described first kind TTI is dispatched in the terminal procedures
The exclusive Downlink Control Information of second correctly demodulated.
Step 208, the downlink data is demodulated based on actual downstream control information.
In the technical scheme, in the target first kind TTI when dispatch terminal, under the first of receivable base station transmission is exclusive
Row control information, the second exclusive Downlink Control Information and downlink data, and it is exclusive by detecting whether can correctly to demodulate second
Downlink Control Information, when determination correctly can not demodulate the second exclusive Downlink Control Information, according to the first exclusive downlink control letter
Breath and the exclusive Downlink Control Information of target second (wherein, the exclusive Downlink Control Information of target second include at least one first
The the second exclusive Downlink Control Information correctly demodulated during class TTI dispatch terminal), actual downstream needed for determining terminal
Information is controlled, since the time interval of first kind TTI (i.e. sTTI) is shorter, under the second of the adjacent sTTI of same terminal is exclusive
The correlation of row control information is stronger, in the case that second exclusive Downlink Control Information of the terminal in this sTTI demodulates mistake,
Replace failing in this sTTI correctly demodulate second specially using the exclusive control information of second in the adjacent sTTI correctly demodulated
Belong to control information to put to increase the probability for correctly demodulating the downlink data in this sTTI compared to terminal in the related technology
The demodulation of this sTTI downlink data, the directly way to base station feedback DTX are abandoned, the re-transmission for significantly reducing sTTI data is general
Rate, while terminal abandons the demodulation of this sTTI downlink data in the related technology, directly needs to this process of base station feedback DTX
There is the regular hour, terminal can efficiently use this period according to the first exclusive Downlink Control Information and target in this programme
Two exclusive Downlink Control Information determine that actual downstream controls information, and are solved based on actual downstream control information to downlink data
It adjusts, so extra latency will not be generated.
In the above-mentioned technical solutions, it is preferable that the exclusive Downlink Control Information of the target second is specified first kind TTI tune
Spend the exclusive Downlink Control Information of second correctly demodulated in the terminal procedures, wherein the specified first kind TTI be away from
From the target first kind TTI time shortest TTI.
In the technical scheme, it is contemplated that each sTTI of same terminal is more adjacent in time, the second exclusive downlink control
The correlation of information processed is stronger, thus by during distance objective first kind TTI time shortest TTI dispatch terminal just
The exclusive Downlink Control Information of second really demodulated increases correct to a greater extent as the exclusive Downlink Control Information of target second
Demodulate the probability of the downlink data in this sTTI.
In any of the above-described technical solution, it is preferable that further include: it can correctly demodulate the described second exclusive downlink control
In the case where information processed, according to the described first exclusive Downlink Control Information and the second exclusive Downlink Control Information, determine
The actual downstream controls information.
In the technical scheme, in the case where correctly the second exclusive Downlink Control Information can be demodulated, according to
One exclusive Downlink Control Information and the second exclusive Downlink Control Information determine that actual downstream controls information, reduce in sTTI
Control information overhead, while meeting the dispatching flexibility in sTTI again.
In any of the above-described technical solution, it is preferable that further include: information is controlled based on the actual downstream detecting
When demodulating failure to the downlink data, the base station Xiang Suoshu sends DTX information.
In the technical scheme, when demodulating failure to downlink data, by sending DTX information to base station, to obtain again
Take related control information, it is ensured that terminal can effectively parse downlink data.
Specifically, it is contemplated that the time interval of sTTI is shorter, the quick control information (i.e. of the adjacent sTTI of same terminal
Two exclusive Downlink Control Information) correlation it is stronger, such as may have been used same or similar MCS in adjacent sTTI
(Modulation and Coding Scheme, modulation and coding strategy) deviant may be assigned in adjacent sTTI for UE
Identical RB etc..In the case that terminal controls information demodulation mistake in this sTTI, correct sTTI is demodulated using the last time
Control information replace this sTTI in fail the quick control information correctly demodulated, increase the data correctly demodulated in this sTTI
The probability of information.
If downlink data demodulates successfully, terminal is to base station feedback ACK；If demodulation failure, terminal is to base station feedback DTX.Phase
Than the demodulation for abandoning this sTTI downlink data in terminal in the related technology, the directly way to base station feedback DTX, above-mentioned implementation
The technical solution of example can be effectively reduced the probability of sTTI data re-transmission.Meanwhile data information demodulation failure after terminal again
The demodulation that this sTTI downlink data is abandoned compared to terminal to the method for base station feedback DTX, directly to the base station feedback side DTX
Method not will increase feedback delay, because terminal is needed at standard predefined moment (such as 4sTTI after this sTTI)
Could be to base station feedback DTX/ACK/NACK, and within this period, terminal has time enough that can solve adjusting data and sentences
The correctness of disconnected solution adjusting data.
In addition, the quick control information for the sTTI that terminal can also correctly demodulate the last time adjusts, after adjustment
Quick control information replace this sTTI in fail the quick control information correctly demodulated.For example, to the last correct demodulation
STTI quick control information in MCS deviant do appropriate up-regulation or lower, using MCS deviant adjusted as
Secondary sTTI quickly controls the deviant in information.
Fig. 3 shows the schematic block diagram of the demodulating equipment of the downlink data of embodiment according to the present invention.
As shown in figure 3, the demodulating equipment 300 of the downlink data of embodiment according to the present invention, is used for terminal, comprising: connect
Receive unit 302, detection unit 304, determination unit 306 and demodulating unit 308.
Wherein, receiving unit 302 is for when dispatching the terminal in target first kind TTI, receiving base station is sent the
One exclusive Downlink Control Information, the second exclusive Downlink Control Information and downlink data, wherein the first exclusive downlink control letter
Breath is carried in the down control channel resources of the second class TTI, and the second exclusive Downlink Control Information is carried on described
In the down control channel resources of target first kind TTI, the second class TTI includes multiple first kind TTI, the target first
Class TTI is any first kind TTI；Detection unit 304 is for detecting whether the described second exclusive downlink can be demodulated correctly
Control information；Determination unit 306 is used to correctly demodulate the described second exclusive downlink control letter in the detection unit determination
When breath, according to the corresponding first exclusive Downlink Control Information of the first kind TTI and the exclusive Downlink Control Information of target second,
Actual downstream needed for determining the terminal controls information, wherein the exclusive Downlink Control Information of the target second includes at least
One first kind TTI dispatches the exclusive Downlink Control Information of second correctly demodulated in the terminal procedures；Demodulation is single
Member 308 is for demodulating the downlink data based on actual downstream control information.
In the technical scheme, in the target first kind TTI when dispatch terminal, under the first of receivable base station transmission is exclusive
Row control information, the second exclusive Downlink Control Information and downlink data, and it is exclusive by detecting whether can correctly to demodulate second
Downlink Control Information, when determination correctly can not demodulate the second exclusive Downlink Control Information, according to the first exclusive downlink control letter
Breath and the exclusive Downlink Control Information of target second (wherein, the exclusive Downlink Control Information of target second include at least one first
The the second exclusive Downlink Control Information correctly demodulated during class TTI dispatch terminal), actual downstream needed for determining terminal
Information is controlled, since the time interval of first kind TTI (i.e. sTTI) is shorter, under the second of the adjacent sTTI of same terminal is exclusive
The correlation of row control information is stronger, such as may have been used same or similar MCS deviant in adjacent sTTI, adjacent
Identical RB etc. may be assigned in sTTI for UE, second exclusive Downlink Control Information demodulation mistake of the terminal in this sTTI
In the case of, it replaces failing correctly to demodulate in this sTTI using the exclusive control information of second in the adjacent sTTI correctly demodulated
Second exclusive control information, so that the probability for correctly demodulating the downlink data in this sTTI is increased, compared in the related technology
Terminal abandons the demodulation of this sTTI downlink data, the directly way to base station feedback DTX, significantly reduces sTTI data
Retransmission probability, while terminal abandons the demodulation of this sTTI downlink data in the related technology, directly to this mistake of base station feedback DTX
Journey needs the regular hour, in this programme terminal can efficiently use this period according to the first exclusive Downlink Control Information and
The exclusive Downlink Control Information of target second determines that actual downstream controls information, and based on actual downstream control information to downlink data
It is demodulated, so extra latency will not be generated.
In the above-mentioned technical solutions, it is preferable that the exclusive Downlink Control Information of the target second is specified first kind TTI tune
Spend the exclusive Downlink Control Information of second correctly demodulated in the terminal procedures, wherein the specified first kind TTI be away from
From the target first kind TTI time shortest TTI.
In the technical scheme, it is contemplated that each sTTI of same terminal is more adjacent in time, the second exclusive downlink control
The correlation of information processed is stronger, thus by during distance objective first kind TTI time shortest TTI dispatch terminal just
The exclusive Downlink Control Information of second really demodulated increases correct to a greater extent as the exclusive Downlink Control Information of target second
Demodulate the probability of the downlink data in this sTTI.
In any of the above-described technical solution, it is preferable that the determination unit 306 is also used to correctly demodulate institute
In the case where stating the second exclusive Downlink Control Information, according to the described first exclusive Downlink Control Information and it is described second it is exclusive under
Row control information determines the actual downstream control information.
In the technical scheme, in the case where correctly the second exclusive Downlink Control Information can be demodulated, according to
One exclusive Downlink Control Information and the second exclusive Downlink Control Information determine that actual downstream controls information, reduce in sTTI
Control information overhead, while meeting the dispatching flexibility in sTTI again.
In any of the above-described technical solution, it is preferable that further include: transmission unit 310, for detecting based on described
When actual downstream controls information to downlink data demodulation failure, the base station Xiang Suoshu sends DTX information.
In the technical scheme, when demodulating failure to downlink data, by sending DTX information to base station, to obtain again
Take related control information, it is ensured that terminal can effectively parse downlink data.
Fig. 4 shows the schematic block diagram of the terminal of embodiment according to the present invention.
As shown in figure 4, the terminal 400 of embodiment according to the present invention, comprising: the demodulation of downlink data as shown in Figure 3
Device 300.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, and the invention proposes a kind of new downlink datas
Demodulation scheme can reduce the probability of sTTI data re-transmission, avoid unnecessary extra latency.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of demodulation method of downlink data is used for terminal characterized by comprising
When dispatching the terminal in target first kind TTI, the first exclusive Downlink Control Information of reception base station transmission, second are specially
Belong to Downlink Control Information and downlink data, wherein the first exclusive Downlink Control Information is carried on the downlink control of the second class TTI
In channel resource processed, the second exclusive Downlink Control Information is carried on the down control channel money of the target first kind TTI
In source, the second class TTI includes multiple first kind TTI, and the target first kind TTI is any first kind TTI；
It detects whether correctly demodulate the described second exclusive Downlink Control Information；
When determination correctly can not demodulate the second exclusive Downlink Control Information, according to the described first exclusive Downlink Control Information
And the exclusive Downlink Control Information of target second, actual downstream needed for determining the terminal control information, wherein the target
Second exclusive Downlink Control Information includes that at least one described first kind TTI is dispatched in the terminal procedures and correctly demodulated
Second exclusive Downlink Control Information；
The downlink data is demodulated based on actual downstream control information.
2. the demodulation method of downlink data according to claim 1, which is characterized in that
The exclusive Downlink Control Information of the target second is correctly to demodulate in the specified first kind TTI scheduling terminal procedures
The second exclusive Downlink Control Information, wherein the specified first kind TTI be apart from the target first kind TTI time it is most short
TTI.
3. the demodulation method of downlink data according to claim 1, which is characterized in that further include:
In the case where correctly the second exclusive Downlink Control Information can be demodulated, according to the described first exclusive downlink control letter
Breath and the second exclusive Downlink Control Information determine the actual downstream control information.
4. the demodulation method of downlink data according to any one of claim 1 to 3, which is characterized in that further include:
Detecting that the base station Xiang Suoshu is sent when demodulating failure to the downlink data based on actual downstream control information
DTX information.
5. a kind of demodulating equipment of downlink data is used for terminal characterized by comprising
Receiving unit when for dispatching the terminal in target first kind TTI, receives the first exclusive downlink control that base station is sent
Information, the second exclusive Downlink Control Information and downlink data processed, wherein the first exclusive Downlink Control Information is carried on second
In the down control channel resources of class TTI, the second exclusive Downlink Control Information is carried under the target first kind TTI
In row control channel resource, the second class TTI includes multiple first kind TTI, and the target first kind TTI is any described the
A kind of TTI；
Detection unit, for detecting whether the described second exclusive Downlink Control Information can be demodulated correctly；
Determination unit, for when the detection unit determination correctly can not demodulate the second exclusive Downlink Control Information, root
According to the corresponding first exclusive Downlink Control Information of the first kind TTI and the exclusive Downlink Control Information of target second, institute is determined
Actual downstream needed for stating terminal controls information, wherein the exclusive Downlink Control Information of the target second includes at least one institute
It states first kind TTI and dispatches the exclusive Downlink Control Information of second correctly demodulated in the terminal procedures；
Demodulating unit, for being demodulated based on actual downstream control information to the downlink data.
6. the demodulating equipment of downlink data according to claim 5, which is characterized in that
The exclusive Downlink Control Information of the target second is correctly to demodulate in the specified first kind TTI scheduling terminal procedures
The second exclusive Downlink Control Information, wherein the specified first kind TTI be apart from the target first kind TTI time it is most short
TTI.
7. the demodulating equipment of downlink data according to claim 5, which is characterized in that the determination unit is also used to
In the case where the described second exclusive Downlink Control Information can correctly be demodulated, according to the described first exclusive Downlink Control Information and
The second exclusive Downlink Control Information determines the actual downstream control information.
8. the demodulating equipment of downlink data according to any one of claims 5 to 7, which is characterized in that further include:
Transmission unit, for detect based on the actual downstream control information to the downlink data demodulate failure when, to
The base station sends DTX information.
9. a kind of terminal characterized by comprising the demodulation of the downlink data as described in any one of claim 5 to 8 fills
It sets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611270284.1A CN106656421B (en) | 2016-12-29 | 2016-12-29 | Demodulation method, demodulating equipment and the terminal of downlink data |
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| CN201611270284.1A CN106656421B (en) | 2016-12-29 | 2016-12-29 | Demodulation method, demodulating equipment and the terminal of downlink data |
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| US11197286B2 (en) | 2017-08-08 | 2021-12-07 | Huawei Technologies Co., Ltd. | Downlink control information monitoring method, terminal, and base station |
| CN109391450B (en) * | 2017-08-11 | 2021-06-01 | 华为技术有限公司 | Data transmission method, network equipment and terminal equipment |
| WO2019119321A1 (en) | 2017-12-20 | 2019-06-27 | 北京小米移动软件有限公司 | Data receiving method and device and data transmitting method and device |
| GB2570145B (en) * | 2018-01-12 | 2020-05-20 | Tcl Communication Ltd | Control information transmission |
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| CN105934917B (en) * | 2014-12-31 | 2019-05-03 | 华为技术有限公司 | A kind of downlink control channel transmission and equipment |
| US10142953B2 (en) * | 2015-02-11 | 2018-11-27 | Electronics And Telecommunications Research Institute | Method and apparatus for performing synchronous HARQ operation according to variable TTI allocation |
| CN106131963A (en) * | 2016-06-12 | 2016-11-16 | 珠海市魅族科技有限公司 | Resource allocation method and device, base station |
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