CN107154905A - Scheduling vector generation method, method for eliminating serial interference, base station and mobile station - Google Patents
Scheduling vector generation method, method for eliminating serial interference, base station and mobile station Download PDFInfo
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- H—ELECTRICITY
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H04L25/03006—Arrangements for removing intersymbol interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The embodiment provides a kind of scheduling vector generation method, method for eliminating serial interference, base station and mobile station.Scheduling vector generation method according to embodiments of the present invention is performed by base station, including：Obtain the code check of machine type communication (MTC) mobile station carried out data transmission in current transmission time interval (TTI) on each subband；Public MTC scheduling vectors are generated according to the code check obtained；The public MTC scheduling vectors are notified to all LTE mobile stations for being connected to the base station.
Description
Technical field
The present invention relates to wireless communication field, and can specifically related to use in a wireless communication system
Scheduling vector generation method, method for eliminating serial interference and corresponding base station and mobile station.
Background technology
Non-orthogonal multiple (NOMA) is the LTE studied in 3GPP (third generation partner program)
The wireless access technology proposed in (Long Term Evolution) Release 13.In NOMA systems, sending
End, base station is multiplexed the data for multiple mobile stations to improve in each resource block with different power stages
Throughput of system, in receiving terminal, mobile station carries out serial interference elimination (SIC) for received data,
To obtain the data of itself.
On the other hand, machine type communication (MTC) turns into and used in 4G and 5G communication systems
Important technology.In order to obtain 15-20dB coverage enhancement, it will be weighed in the packet of MTC technologies identical
Hair 200-300 times.Compared with LTE mobile stations, MTC mobile stations are transmitted using narrower bandwidth.
If base station is desirable for NOMA technologies by for the data of LTE mobile stations and for MTC mobile stations
Data-reusing, then frequency band used in a LTE mobile station correspond to multiple MTC mobile stations made
Frequency band.
At present, there is provided the method for dispatching two LTE mobile stations simultaneously in NOMA systems.
Base station generates the special of the mobile station for one in simultaneously scheduled LTE mobile stations in the dispatching method
Scheduling vector, and specific schedule vector is notified to another mobile station, so that another mobile station is gone here and there
Row interference is eliminated.However, when base station is by for the data of LTE mobile stations and for MTC mobile stations
When data are multiplexed, existing dispatching method can cause to need substantial amounts of control signaling, therefore inapplicable
In the wireless communication system that NOMA and MTC are applied in combination.
The content of the invention
According to an aspect of the invention, there is provided a kind of scheduling vector generation method performed by base station,
Including：Obtain the machine carried out data transmission in current transmission time interval (TTI) on each subband
The code check of type communication (MTC) mobile station；According to the code check that is obtained generate public MTC dispatch to
Amount；The public MTC scheduling vectors are notified to all LTE mobile stations for being connected to the base station.
There is provided a kind of serial interference elimination performed by LTE mobile stations according to another aspect of the present invention
Method, including：Pair with the LTE mobile stations match machine type communication (MTC) mobile station tune
Mode processed carries out blind check, to determine the modulation system for the MTC mobile stations matched with the LTE mobile stations；
According to the public MTC scheduling vectors notified from base station, it is determined that the MTC matched with the LTE mobile stations
The code check of mobile station, wherein the public MTC scheduling vectors include indicating in current TTI at each
The code rate information of the code check of the MTC mobile stations carried out data transmission on subband；And adjusted according to identified
Mode processed and code check, the data to the MTC mobile stations for being matched with the LTE mobile stations are gone here and there
Row interference is eliminated.
In accordance with a further aspect of the present invention there is provided a kind of base station, including：Code check acquiring unit, configuration
To obtain the machine type carried out data transmission in current transmission time interval (TTI) on each subband
The code check of (MTC) mobile station that communicates；Scheduling vector generation unit, is configured to according to the code check obtained
Generate public MTC scheduling vectors；Transmitting element, is configured to all LTE for being connected to the base station
Mobile station notifies the public MTC scheduling vectors.
Include according to another aspect of the invention there is provided a kind of LTE mobile stations：Modulation system determines single
Member, is configured to the modulation pair machine type communication (MTC) mobile station matched with the LTE mobile stations
Mode carries out blind check, to determine the modulation system for the MTC mobile stations matched with the LTE mobile stations；
Code check determining unit, be configured to according to from base station notify public MTC scheduling vectors, it is determined that with it is described
The code check of the MTC mobile stations of LTE mobile stations pairing, wherein the public MTC scheduling vectors include referring to
Show the code check letter of the code check of the MTC mobile stations carried out data transmission in current TTI on each subband
Breath；And serial interference elimination unit, be configured to according to identified modulation system and code check, to for
The data for the MTC mobile stations matched with the LTE mobile stations carry out serial interference elimination.
Utilize the scheduling vector generation method according to above-mentioned aspect of the invention, method for eliminating serial interference, base
Stand and LTE mobile stations, can be by generating in current TTI, in the enterprising row data of each subband
The data that MTC mobile stations are transmitted are carried out by the public MTC scheduling vectors of the MTC mobile stations of transmission
Serial interference elimination, so that base station need not generate special scheduling vector to each MTC mobile stations, this
Enable wireless communication system as small as possible increase signaling consumption in the case of, support NOMA with
MTC's is applied in combination.
Brief description of the drawings
By the way that with reference to accompanying drawing, embodiments of the present invention is described in detail, above and other mesh of the invention
, feature, advantage will become apparent.
Fig. 1 shows the flow of the scheduling vector generation method according to embodiments of the present invention performed by base station
Figure.
Fig. 2 shows candidate modulation mode and the signal of candidate's code check of an example according to the present invention
Figure.
Fig. 3 shows the schematic diagram of the public MTC scheduling vectors of an example according to the present invention.
Fig. 4 shows the signal identified according to the example of the present invention to MTC mobile station distributions user
Figure.
Fig. 5 shows the schematic diagram of the mobile station identification vector according to the user's mark generation distributed in Fig. 4.
Fig. 6 shows the flow of the method for eliminating serial interference according to embodiments of the present invention performed by mobile station
Figure.
Fig. 7 shows an example according to the present invention, user's mark sum of caching MTC mobile stations
The flow chart of Fast Sequential interference elimination method is carried out according to this.
Fig. 8 shows the user's mark for being used to cache in LTE mobile stations according to the example of the present invention
And the schematic diagram of the buffer of data.
Fig. 9 shows the block diagram of base station according to embodiments of the present invention.
Figure 10 shows the block diagram of LTE mobile stations according to an embodiment of the invention.
Figure 11 shows the block diagram of LTE mobile stations according to another embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings to describe scheduling vector generation method according to embodiments of the present invention, it is serial dry
Disturb removing method, base station and mobile station.In the accompanying drawings, identical reference number represents identical from beginning to end
Element.It should be understood that：The embodiments described herein is merely illustrative, and is not necessarily to be construed as limit
The scope of the present invention processed.In addition, UE described here can include various types of user terminals, example
Such as mobile terminal (or being mobile station) or fixed terminal, however, for convenience, hereinafter
UE and mobile station is sometimes interchangeably used.
In the example according to the present invention, in a TTI, base station can be by the number for LTE mobile stations
It is multiplexed according to the data for MTC mobile stations by NOMA.Specifically, in a TTI,
The frequency band carried out data transmission includes multiple subbands (Sub Band, SB), and each MTC mobile stations
Carried out data transmission using one of subband, and each LTE mobile stations are using two therein or more
Many subbands carry out data transmission.In other words, base station can by for the data of a LTE mobile station with being used for
The data of multiple MTC mobile stations are multiplexed by NOMA.
First, reference picture 1 describes the scheduling vector generation side according to embodiments of the present invention performed by base station
Method.Fig. 1 shows the flow chart of the scheduling vector generation method 100.In serial interference elimination, one moves
Dynamic platform needs to obtain and using information such as modulation system, the code checks of other mobile stations matched with it.In order to
The control signaling used needed for further reducing, according to embodiments of the present invention, base station can not be moved to LTE
Platform notifies the modulation system of MTC mobile stations, and LTE mobile stations can determine that MTC is moved by blind check
The modulation system of dynamic platform, and base station only can notify MTC mobile stations by scheduling vector to LTE mobile stations
Code check.
As shown in figure 1, in step S101, obtaining and being carried out in current TTI, on each subband
The code check of the MTC mobile stations of data transfer.Then in step s 102, given birth to according to the code check obtained
Into public MTC scheduling vectors., can in advance can to MTC mobile stations according to the example of the present invention
The various code checks used are encoded, to indicate corresponding code check.Can determine that in step s 102 with each
The corresponding code word of code check of the MTC mobile stations carried out data transmission on height band, and according to each code word
Generate public MTC scheduling vectors.
The Different Modulations such as QPSK, 16QAM, 64QAM can be used in current MTC mobile stations,
And every kind of modulation system can have various code rate corresponding with which.Preferably, can be in advance from multiple
A part of modulation system is selected in modulation system as candidate modulation mode.MTC mobile stations are in data transfer
When use a modulation system in candidate modulation mode.So as to which LTE mobile stations are only needed to being selected as
The modulation system of candidate modulation mode carries out blind check, simplifies answering for the blind detection operation that LTE mobile stations are carried out
Miscellaneous degree.In addition, also a part of code check can be selected from the multiple code checks of each candidate modulation mode correspondence in advance
It is used as candidate's code check.MTC mobile stations use a code check in candidate's code check in data transfer.So as to
The control signaling for notifying to be used needed for public MTC scheduling vectors can further be reduced.
Fig. 2 shows candidate modulation mode and the signal of candidate's code check of an example according to the present invention
Figure.As shown in Fig. 2 QPSK can be selected from multiple modulation systems that MTC mobile stations can be used in advance
Candidate modulation mode is used as with 16QAM.So as to which LTE mobile stations only need to be in QPSK when carrying out blind check
Modulation system used in MTC mobile stations is determined between 16QAM both modulation systems.
In addition, three code checks can be selected from the corresponding all code checks of QPSK in advance as QPSK correspondences
Candidate's code check；Similarly, from the corresponding all code checks of 16QAM three code checks can be selected to make in advance
For the corresponding candidate's code checks of 16QAM (as shown in grey entry in Fig. 2).Shown according to one of the present invention
Example, code word 1,2,3 can be used to indicate respectively the corresponding candidate's code checks 0.11,0.28 and 0.48 of QPSK；
Similarly, code word 1,2,3 can be used to indicate respectively the corresponding candidate's code checks 0.31,0.44 of 16QAM
With 0.54.
Although it should be noted that representing candidate using code word 1,2,3 herein with QPSK and 16QAM
It is described exemplified by code check, but the invention is not restricted to this.In alternative embodiments of the invention,
Different code words can be used to represent candidate's code check.For example, code word 1,2,3,4,5,6 can be used
Indicate respectively candidate's code check 0.11,0.28,0.48,0.31,0.44 and 0.54.
Fig. 3 shows the schematic diagram of the public MTC scheduling vectors of an example according to the present invention.
In example shown in Fig. 3, it is assumed that in current TTI, the frequency band available for data transfer includes 6 sons
Band, i.e. SB1 is to SB6, wherein the MTC mobile stations on SB1 are modulated simultaneously using QPSK
Encoded with code check 0.11, there is no MTC mobile stations to carry out data transmission on SB2, on SB3
MTC mobile stations be modulated and encoded with code check 0.48 using QPSK, on SB4
MTC mobile stations are modulated using 16QAM and encoded with code check 0.31, are not had on SB5
MTC mobile stations carry out data transmission, and the MTC mobile stations on SB6 are modulated using 16QAM
And encoded with code check 0.54.According to step S102, the coding staff that can be described above in connection with Fig. 2
Formula generates public MTC scheduling vectors 300.As shown in figure 3, in public MTC scheduling vectors 300,
SB1 fields include code word 1, and SB2 fields include code word 0, and SB3 fields include code word 3, SB4 fields
Comprising code word 1, SB5 fields include code word 0, and SB6 fields include code word 3, wherein " 0 " is represented at this
The upper no MTC mobile stations of SB carry out data transmission with base station.
Fig. 1 is returned, in step s 103, the public affairs are notified to all LTE mobile stations for being connected to base station
Common MTC scheduling vectors.For example, base station can be used Radio Network Temporary Identifier public MTC is dispatched to
Amount scrambling, and the public MTC scheduling vectors after scrambling are notified to give LTE mobile stations.
Due to notifying the public MTC scheduling vectors to all mobile stations in step s 103, rather than such as
Existing scheduling vector generation method like that, generate on specific mobile station specific schedule vector and should
Specific schedule vector notifies that giving the specific mobile station matches another mobile station, therefore need not use movement
The specific Radio Network Temporary Identifier of platform is scrambled, but public Radio Network Temporary Identifier can be used
Being scrambled, and be connected to all LTE mobile stations of base station can be used the public wireless network interim
Mark is descrambled.
Specifically, can previously generate the public MTC of all LTE mobile stations for being connected to base station without
Line Network Temporary Identifier, and notify that the public MTC is wireless to all LTE mobile stations for being connected to base station
Network Temporary Identifier.After public MTC scheduling vectors are generated according to step S102, by public
MTC Radio Network Temporary Identifiers are scrambled to public MTC scheduling vectors, and in step S103
It is middle that the public MTC scheduling vectors after row scrambling are broadcasted to all LTE mobile stations for being connected to base station.
In the scheduling vector generation method of the present embodiment, according on current TTI, in each height
The code check for taking the MTC mobile stations carried out data transmission generates public MTC scheduling vectors to carry out serially
Interference is eliminated, without generating single scheduling vector to each mobile station.This causes radio communication system
System can be in the case of increase signaling consumption as small as possible, and supporting NOMA and MTC combination makes
With.
In addition in the scheduling vector generation method of the present embodiment, it may be unnecessary to including on each mobile station
Modulation system information.Furthermore, it is contemplated that MTC mobile stations are carried out data transmission using arrowband, and
Shared frequency band is continuous resource block, and pass can be also omitted in the public MTC scheduling vectors of the present embodiment
In the information of the frequency resource shared by MTC mobile stations.Thus further reduce signaling consumption.
In addition, the scheduling vector generation method 100 shown in Fig. 1 may also include MTC mobile station distributions
User identifies and notifies to give LTE mobile stations, so that LTE mobile stations are to the MTC mobile stations that receive
Transmitting data information is identified.Specifically, scheduling vector generation method 100 may also include for being connected to base
The MTC mobile station distributions user mark (ID) stood；According in current TTI in the enterprising line number of each subband
According to user's mark generation mobile station identification vector of the MTC mobile stations of transmission；And to being connected to base station
All LTE mobile stations notify mobile station identification vector.Due to being incited somebody to action in the packet of MTC technology identicals
It is retransmitted 200-300 times, so by identifying and notifying to move to LTE to MTC mobile station distribution users
Dynamic platform, LTE mobile stations can correspond to user's mark and the packet of storage MTC mobile stations, to use
The packet stored rapidly carries out serial interference elimination, without sending packet every time
When all to the packet carry out the operation such as decode.
Fig. 4 shows the signal identified according to the example of the present invention to MTC mobile station distributions user
Figure.Fig. 5 shows the schematic diagram of the mobile station identification vector according to the user's mark generation distributed in Fig. 4.
As shown in figure 4, in current TTI, the frequency band available for data transfer includes 6 subbands, i.e. SB1
To SB6, wherein thering is MTC mobile stations and base station to enter line number respectively on SB1, SB3, SB4 and SB6
According to transmission.Base station can be right for the MTC mobile station distribution ID values 1 that carry out data transmission on SB1
In the MTC mobile station distribution ID values 2 carried out data transmission on SB3, in the enterprising line numbers of SB4
According to the MTC mobile station distribution ID values 3 of transmission, moved for the MTC carried out data transmission on SB6
Dynamic platform distribution ID values 4.Then in the ID allocation results that base station can be according to Fig. 4, generation Fig. 5
The mobile station identification vector 500 shown.In the example depicted in fig. 5, mobile station identification vector 500
The maximum number of MTC mobile station of the size with being connectable to base station in a TTI is corresponding.Tool
Body, in mobile station identification vector 500, the ID values of SB1 fields are the ID values of 1, SB2 fields
The ID values for being 2, SB4 for 0, SB3 ID values are that 3, SB5 ID values are 0, SB6 ID values
For 4, wherein " 0 " represents do not have MTC mobile stations to carry out data transmission on the SB.
Because MTC uses frequency hopping to obtain frequency gain, in each TTI, in each subband
On the MTC mobile stations that carry out data transmission may change.It is preferred that base station can be in each TTI
Generate and notify current TTI mobile station identification vector.
According to the example of the present invention, can be assigned to the ID of MTC mobile stations number can be
The maximum number of the MTC mobile stations of base station is connectable in a TTI.For example in Fig. 4 and Fig. 5
In shown example, the maximum number that the MTC mobile stations of base station are connectable in a TTI is 6,
Therefore ID 1-6 can be pre-set to distribute to MTC mobile stations.
It there may be the MTC mobile stations that base station is newly connected in current TTI.In the case, in order to
The ID for avoiding and distributing to the MTC mobile stations for having been coupled to base station is repeated, preferably can be for working as
Preceding TTI is newly connected to the ID that the MTC mobile station distributions of base station be previously not previously allocated.For example, false
There is the MTC mobile stations for being newly connected to base station in the next TTI for the TTI being located at shown in Fig. 4 and Fig. 5,
The MTC mobile station distribution ID values 5 of base station then can be newly connected to this.In addition, equal in all predetermined ID
MTC mobile stations are already allocated to, and there is the MTC mobile stations for being newly connected to base station in current TTI
In the case of, the MTC movements that can will be previously connected and be no longer connected in current TTI with base station with base station
The ID values of platform distribute to the new MTC mobile stations for being connected to base station.
Below, reference picture 6 describes the serial interference elimination according to embodiments of the present invention performed by mobile station
Method.Fig. 6 shows the flow chart of the method for eliminating serial interference 600 performed by mobile station.Such as Fig. 6 institutes
Show, in step s 601, the modulation system progress of pair MTC mobile stations matched with LTE mobile stations is blind
Inspection, to determine the modulation system for the MTC mobile stations matched with LTE mobile stations.Specifically, in NOMA
In system, the MTC mobile stations matched with LTE mobile stations are used for the frequency band and LTE of data transfer for it
Mobile station is used for the MTC mobile stations of the band overlapping of data transfer.In other words, in current TTI,
Its downlink band MTC mobile station overlapping with the downlink band of a LTE mobile stations be and this
The MTC mobile stations of LTE mobile stations pairing.In step s 601, LTE mobile stations can be to descending at its
The modulation system of the MTC mobile stations carried out data transmission on the subband that link frequency bands are included carries out blind check.
In addition as described above, can be selected in advance from multiple modulation systems that MTC mobile stations can be used
QPSK and 16QAM is used as candidate modulation mode, i.e. the modulation system QPSK of MTC mobile stations and
One kind in 16QAM.So as to LTE mobile stations carry out blind check when only need to QPSK and 16QAM this
Modulation system used in determining MTC mobile stations between two kinds of modulation systems, simplifies LTE mobile stations
The complexity of blind check.
For example, in the example described above in association with Fig. 3, available for data transfer in current TTI
Frequency band includes this 6 subbands of SB1 to SB6, it is assumed that the data transmission frequency band of a LTE mobile stations is SB1
To SB3.According to step S601, LTE mobile stations are in the enterprising row data of SB1, SB2 and SB6
The modulation system of MTC mobile stations carries out blind check, and determines that the MTC mobile stations on SB1 use QPSK
It is modulated, does not have MTC mobile stations to carry out data transmission on SB2, the MTC on SB6 is moved
Dynamic platform is modulated using 16QAM.
, can be according to the public MTC scheduling vectors notified from base station, it is determined that and LTE in step S602
The code check of the MTC mobile stations of mobile station pairing, wherein public MTC scheduling vectors include indicating current
The code rate information of the code check of the MTC mobile stations carried out data transmission in TTI on each subband.It can pass through
Public MTC scheduling vectors are generated above in association with Fig. 1-4 methods described, be will not be repeated here.In addition such as
Upper described, the public MTC scheduling vectors that base station is sent can be the public MTC scheduling vectors after scrambling.
According to the example of the present invention, LTE mobile stations can receive public MTC when being connected with base station from base station
Radio Network Temporary Identifier, to descramble to the vector received.
For example in the example described above in association with Fig. 3, determined according to step S601 on SB1
MTC mobile stations are modulated using QPSK, and the MTC mobile stations on SB6 are entered using 16QAM
After row modulation, public MTC scheduling vectors 300 that can be according to Fig. 3 further obtain SB1
Field includes code word 1, and SB2 fields include code word 0, and SB6 fields include code word 3, and according to predetermined
Coded system can determine that the MTC mobile stations on SB1 are encoded with code check 0.11, on SB6
MTC mobile stations encoded with code check 0.54.
Although being described it should be noted that first carrying out herein exemplified by step S601 performs step S602 again,
But the invention is not restricted to this.For example, the code check of MTC mobile stations need not determined according to modulation system
In the case of, step S601 and step S602 can be performed simultaneously.
Finally in step S603, according to identified modulation system and code check, to for being moved with LTE
The data of the MTC mobile stations of dynamic platform pairing carry out serial interference elimination.
In the method for eliminating serial interference of the present embodiment, the modulation of MTC mobile stations is obtained by blind check
Mode, and pass through the code check of public MTC scheduling vectors acquisition MTC mobile stations.This causes channel radio
Letter system can support NOMA and MTC group in the case of increase signaling consumption as small as possible
Conjunction is used.
In addition as noted previously, as will be retransmitted 200-300 times in MTC technology identical packets,
So LTE mobile stations can store user's mark and the packet that MTC mobile stations are distributed in correspondence storage,
To use stored packet rapidly to carry out serial interference elimination, without sending every time
All the packet is carried out during packet the operation such as to decode.
Specifically, the method in Fig. 6 may also include user's mark sum of caching MTC mobile stations according to this
Carry out the step of Fast Sequential interference is eliminated.Fig. 7 shows an example according to the present invention, caches MTC
User's mark sum of mobile station carries out the flow chart of Fast Sequential interference elimination method according to this.Such as Fig. 7
It is shown, step S701 cache be connected to base station MTC mobile stations user mark and for with
Family identifies the data of corresponding MTC mobile stations.Here the user cached identifies and corresponding with user's mark
Data can be obtained in previous TTI.
As described above, it can be in a TTI that can be assigned to the ID of MTC mobile stations number
It is connectable to the maximum number of the MTC mobile stations of base station.Correspondingly, can be according in a TTI
The maximum number of the MTC mobile stations of base station is connectable to, it is determined that the cache user in LTE mobile stations
The buffer size of mark and data.
Fig. 8 shows the user's mark for being used to cache in LTE mobile stations according to the example of the present invention
And the schematic diagram of the buffer of data.Assuming that in the example depicted in fig. 8, can in a TTI
The maximum number for being connected to the MTC mobile stations of base station is 6.Storage can be pre-set in buffer 800
Table, and wherein include the entry of the ID 1-6 corresponding to MTC mobile stations.Received in previous TTI
To the data aa of the MTC mobile stations for ID=1, MTC mobile stations for ID=2 are received
Data bb, receives the data dd of the MTC mobile stations for ID=4, receives for ID=6's
In the case of the data ff of MTC mobile stations, as shown in figure 8, data storage aa corresponding with ID 1, with
ID 2 corresponding data storage bb, data storage dd corresponding with ID 4, and with the corresponding data storages of ID 6
ff。
Return Fig. 7, in step S702, according to the current TTI notified from base station mobile station identification to
Amount, obtains user's mark of the MTC mobile stations carried out data transmission in current TTI on each subband.
Then the data of caching corresponding with the user's mark obtained are determined whether there is in step S703.
, can be according to institute in step S603 when the data that presence is corresponding with the user's mark obtained, cache
The modulation system and code check of determination, pair corresponding with the user's mark obtained, caching a data are gone here and there
Row interference is eliminated.On the other hand, when in the absence of user's mark with being obtained it is corresponding, caching data
When, the number for the corresponding MTC mobile stations of user's mark with being obtained is can detect in step S603
According to；And according to identified modulation system and code check, pair carrying out serial interference with the data that are detected disappears
Remove.
For example according to the current TTI notified from base station mobile station identification vector, obtain in current TTI
The ID of the MTC mobile stations carried out data transmission on each subband is 1,2 and 3.In showing shown in Fig. 8
In example, ID is buffered in advance for the data of 1 and 2 MTC mobile stations, and LTE mobile stations can be according to institute
The modulation system and code check of determination, using data cached to being 1 and 2 MTC mobile stations for ID
Data carry out serial interference elimination.Specifically, LTE mobile stations can the preferred mobile station according to current TTI
Mark vector determines the SB shared by the data for the MTC mobile stations that ID is 1 and 2, and determines caching
Whether the MTC with identified (such as according to step S601 and S602), on the SB is moved data
The modulation system of dynamic platform is corresponding with code check, and in data cached and identified modulation system and code check pair
In the case of answering, serial interference elimination is carried out.On the other hand in data cached and identified modulation system
In the case of not corresponding with code check, LTE mobile stations need to be detected in current TTI again, be 1 for ID
With the data of 2 MTC mobile stations, and pair serial interference elimination is carried out with the data that are detected.In addition,
Because ID is not buffered in advance for the data of 3 MTC mobile stations, LTE mobile stations need to be detected and ID
For the data of 3 corresponding MTC mobile stations transmission, and pair disappear with the data progress serial interference that is detected
Remove.
Preferably, detection for MTC mobile stations corresponding with the user's mark obtained data it
Afterwards, the data of caching can be updated according to the data detected.
Scheme according to Fig. 7 and Fig. 8, the user of LTE mobile stations correspondence storage MTC mobile stations
Mark and packet, so as to use stored packet rapidly to carry out serial interference elimination,
Without all carrying out the operation such as decoding to the packet when sending packet every time.
Below, reference picture 9 describes base station according to embodiments of the present invention.Fig. 9 is shown according to this hair
The block diagram of the base station 900 of bright embodiment.As shown in figure 9, base station 900 include code check acquiring unit 910,
Scheduling vector generation unit 920 and transmitting element 930.In addition to these three units, base station 900 is also
Miscellaneous part can be included, however, because these parts are unrelated with the content of the embodiment of the present invention, therefore
Its diagram is omitted herein and is described.Further, since what base station 900 according to embodiments of the present invention was performed
The detail of operations described below is identical with the details described above with reference to Fig. 1-5, therefore is herein
The repeated description for avoiding repeating and omitting to same detail.
In serial interference elimination, a mobile station needs to obtain and using other mobile stations matched with it
The information such as modulation system, code check.For the control signaling used needed for further reducing, according to the present invention
Embodiment, base station 900 can not notify the modulation system of MTC mobile stations, and LTE to LTE mobile stations
Mobile station can determine the modulation system of MTC mobile stations by blind check, and base station 900 can only pass through scheduling
Vector notifies the code check of MTC mobile stations to LTE mobile stations.
Code check acquiring unit 910 obtained in current TTI, carried out data transmission on each subband
The code check of MTC mobile stations.Then scheduling vector generation unit 920 is public according to the code check generation obtained
MTC scheduling vectors.According to the example of the present invention, MTC mobile stations can be used in advance
Various code checks are encoded, to indicate corresponding code check.Scheduling vector generation unit 920 can determine that with
The corresponding code word of code check of the MTC mobile stations carried out data transmission on each subband, and according to each code
Word generates public MTC scheduling vectors.
The Different Modulations such as QPSK, 16QAM, 64QAM can be used in current MTC mobile stations,
And every kind of modulation system can have various code rate corresponding with which.Preferably, base station 900 may be used also
Including modulation system selecting unit, using selected in advance from multiple modulation systems a part of modulation system as
Candidate modulation mode.MTC mobile stations use a modulation methods in candidate modulation mode in data transfer
Formula.So as to which LTE mobile stations only need to carry out blind check to the modulation system for being selected as candidate modulation mode,
Simplify the complexity of the blind detection operation of LTE mobile stations progress.
In addition, base station 900 may also include code rate selection unit, with advance from each candidate modulation mode pair
Answer and a part of code check is selected in multiple code checks as candidate's code check.MTC mobile stations are used in data transfer
A code check in candidate's code check.Notify to use needed for public MTC scheduling vectors so as to further reduction
Control signaling.
Transmitting element 930 notifies the public MTC to dispatch to all LTE mobile stations for being connected to base station
Vector.For example, Radio Network Temporary Identifier can be used to scramble public MTC scheduling vectors for base station, and will
Public MTC scheduling vectors after scrambling notify to give LTE mobile stations.In the case, base station 900 is gone back
It may include identification generation unit and vector processing unit.
Because transmitting element 930 to all mobile stations notifies the public MTC scheduling vectors, rather than such as
Existing scheduling vector generation method like that, generate on specific mobile station specific schedule vector and should
Specific schedule vector notifies that giving the specific mobile station matches another mobile station, therefore need not use movement
The specific Radio Network Temporary Identifier of platform is scrambled, but public Radio Network Temporary Identifier can be used
Being scrambled, and be connected to all LTE mobile stations of base station can be used the public wireless network interim
Mark is descrambled.
Specifically, identification generation unit can previously generate all LTE mobile stations for being connected to base station
Public MTC Radio Network Temporary Identifiers, and transmitting element can be to all LTE shiftings for being connected to base station
Dynamic platform notifies the public MTC Radio Network Temporary Identifiers.Scheduling vector generation unit 920 generates public
After MTC scheduling vectors, vector processing unit can be by public MTC Radio Network Temporary Identifiers to public affairs
Common MTC scheduling vectors are scrambled, and transmitting element 930 is moved to all LTE for being connected to base station
Public MTC scheduling vectors after dynamic platform broadcast row scrambling.
In the base station of the present embodiment, according on current TTI, in the enterprising row data of each subband
The code check of the MTC mobile stations of transmission generates public MTC scheduling vectors to carry out serial interference elimination, and
Single scheduling vector need not be generated to each mobile station.This enables wireless communication system to the greatest extent may be used
In the case of signaling consumption can be increased smallly, being applied in combination for NOMA and MTC is supported.
In addition the modulation system on each mobile station need not can be included in the base station 900 of the present embodiment
Information.Furthermore, it is contemplated that MTC mobile stations are carried out data transmission using arrowband, and shared frequency band is
Continuous resource block, can also be omitted in the public MTC scheduling vectors of the present embodiment on MTC movements
The information of frequency resource shared by platform.Thus further reduce signaling consumption.
In addition, base station 900 can also identify to MTC mobile station distribution users and notify to give LTE mobile stations,
The transmitting data information of MTC mobile stations so as to LTE mobile stations to receiving is identified.Specifically, base
Stand and 900 may also include mark allocation unit and mark vector generation unit.Identifying allocation unit can be for even
It is connected to the MTC mobile station distributions user mark (ID) of base station.Mark vector generation unit can be according to current
User's mark generation mobile station identification of the MTC mobile stations carried out data transmission in TTI on each subband
Vector.In addition transmitting element 930 can also notify mobile station symbol to all LTE mobile stations for being connected to base station
Know vector.
Due to that will be retransmitted 200-300 times in MTC technology identical packets, so by MTC
Mobile station distribution user identifies and notifies to give LTE mobile stations, and LTE mobile stations can correspond to storage MTC and move
User's mark of dynamic platform and packet, to use stored packet rapidly serially to be done
Elimination is disturbed, without all carrying out the operation such as decoding to the packet when sending packet every time.
The big I of mobile station identification vector and the MTC movements that base station is connectable in a TTI
The maximum number of platform is corresponding.Further, since MTC uses frequency hopping to obtain frequency gain, every
In individual TTI, the MTC mobile stations carried out data transmission on each subband may change.Therefore preferably
Ground, base station 900 can generate in each TTI and notify current TTI mobile station identification vector.
According to the example of the present invention, the ID that allocation unit distributes to MTC mobile stations can be identified
Number can be connectable in a TTI base station MTC mobile stations maximum number.Can
There can be the MTC mobile stations that base station is newly connected in current TTI.In the case, in order to avoid with
The ID for distributing to the MTC mobile stations for having been coupled to base station is repeated, and preferably identifying allocation unit can be right
The ID being previously not previously allocated in the MTC mobile station distributions that base station is newly connected in current TTI.This
Outside, MTC mobile stations are already allocated in all predetermined ID, and there is new connection in current TTI
To base station MTC mobile stations in the case of, mark allocation unit previously will can be connected with base station and current
The ID values for the MTC mobile stations that TTI is no longer connected with base station distribute to the new MTC movements for being connected to base station
Platform.
Below, reference picture 10 describes LTE mobile stations according to an embodiment of the invention.Figure 10 shows
The block diagram of LTE mobile stations 1000 according to an embodiment of the invention is gone out.As shown in Figure 10, LTE
Mobile station 1000 disappears including modulation system determining unit 1010, code check determining unit 1020 and serial interference
Except unit 1030.In addition to these three units, LTE mobile stations 1000 can also include miscellaneous part,
However, because these parts are unrelated with the content of the embodiment of the present invention, thus omit herein its diagram and
Description.Further, since the operations described below that LTE mobile stations 1000 according to embodiments of the present invention are performed
Detail is identical with the details described above with reference to Fig. 6-8, therefore herein in order to avoid repetition
And omit the repeated description to same detail.
The modulation system for the MTC mobile stations that 1010 pairs of modulation system determining unit is matched with LTE mobile stations
Blind check is carried out, to determine the modulation system for the MTC mobile stations matched with LTE mobile stations.Specifically,
In NOMA systems, the MTC mobile stations matched with LTE mobile stations are used for the frequency of data transfer for it
Band is used for the MTC mobile stations of the band overlapping of data transfer with LTE mobile stations.In other words, current
In TTI, the MTC movement overlapping with the downlink band of a LTE mobile stations of its downlink band
Platform is the MTC mobile stations matched with the LTE mobile stations.Modulation system determining unit 1010 can be at it
The modulation system of the MTC mobile stations carried out data transmission on the subband that downlink band is included is carried out
Blind check.
In addition as described above, can be selected in advance from multiple modulation systems that MTC mobile stations can be used
QPSK and 16QAM is used as candidate modulation mode, i.e. the modulation system QPSK of MTC mobile stations and
One kind in 16QAM.So as to which modulation system determining unit 1010 only need to be in QPSK when carrying out blind check
Modulation system used in determining MTC mobile stations between 16QAM both modulation systems, is simplified
The complexity of blind check.
Code check determining unit 1020 can be according to the public MTC scheduling vectors notified from base station, it is determined that and LTE
The code check of the MTC mobile stations of mobile station pairing, wherein public MTC scheduling vectors include indicating current
The code rate information of the code check of the MTC mobile stations carried out data transmission in TTI on each subband.According to this
One example of invention, can first pass through modulation system determining unit 1010 and carry out blind check, then pass through code check
Determining unit 1020 is according to identified modulation system and public MTC scheduling vectors, it is determined that being moved with LTE
The code check of the MTC mobile stations of dynamic platform pairing.Alternatively, MTC need not determined according to modulation system
In the case of the code check of mobile station, also blind check can be carried out by modulation system determining unit 1010 simultaneously and led to
Cross code check determining unit 1020 and determine code check.
Last serial interference elimination unit 1030 according to identified modulation system and code check, to for
The data of the MTC mobile stations of LTE mobile stations pairing carry out serial interference elimination.
The modulation system of MTC mobile stations is obtained by blind check according to the LTE mobile stations of the present embodiment, and
And the code check of MTC mobile stations is obtained by public MTC scheduling vectors.This enables wireless communication system
Enough in the case of increase signaling consumption as small as possible, being applied in combination for NOMA and MTC is supported.
In addition as noted previously, as will be retransmitted 200-300 times in MTC technology identical packets,
So LTE mobile stations can store user's mark and the packet that MTC mobile stations are distributed in correspondence storage,
To use stored packet rapidly to carry out serial interference elimination, without sending every time
All the packet is carried out during packet the operation such as to decode.
Specifically, LTE mobile stations can also cache MTC mobile stations user mark sum carry out according to this soon
Fast serial interference elimination.Figure 11 shows LTE mobile stations 1100 according to another embodiment of the present invention
Block diagram.As shown in figure 11, LTE mobile stations 1100 include respectively with modulation system determining unit 1010,
The modulation system determining unit 1110 similar with serial interference elimination unit 1030 of code check determining unit 1020,
Code check determining unit 1120 and serial interference elimination unit 1130.In addition, LTE mobile stations 1100 are also wrapped
Include buffer unit 1140, mark acquiring unit 1150 and data determination unit 1160.
Specifically, buffer unit 1140 cache be connected to base station MTC mobile stations user mark and
Data for MTC mobile stations corresponding with user's mark.Here the user's mark cached and and user
Identifying corresponding data can obtain in previous TTI.
As described above, it can be in a TTI that can be assigned to the ID of MTC mobile stations number
It is connectable to the maximum number of the MTC mobile stations of base station.Correspondingly, can be according in a TTI
The maximum number of the MTC mobile stations of base station is connectable to, it is determined that the cache user in LTE mobile stations
The buffer size of mark and data.
Mark acquiring unit 1150 is obtained according to the current TTI notified from base station mobile station identification vector
User's mark of the MTC mobile stations carried out data transmission in current TTI on each subband.Then count
The data of caching corresponding with the user's mark obtained are determined whether there is according to determining unit 1160.When
In the presence of user's mark with being obtained it is corresponding, caching data when, serial interference elimination unit 1130 can
According to identified modulation system and code check, pair corresponding with the user's mark obtained, caching data
Carry out serial interference elimination.On the other hand, when in the absence of user's mark with being obtained it is corresponding, caching
Data when, serial interference elimination unit 1130 can detect corresponding for user's mark with being obtained
The data of MTC mobile stations；And according to identified modulation system and code check, pair with the data that are detected
Carry out serial interference elimination.
Preferably, buffer unit 1140 can be used for the corresponding MTC of user's mark with being obtained in detection
After the data of mobile station, the data of caching can be updated according to the data detected.
Scheme according to Figure 11, LTE mobile stations correspondence storage MTC mobile stations user mark and
Packet, so as to use stored packet rapidly to carry out serial interference elimination, without
Need that all the packet is carried out when sending packet every time the operation such as to decode.
The operation of above-mentioned base station 900 and LTE mobile stations 1000,1100 can be realized by hardware,
Can be by being realized by the software module of computing device, and can further pass through both combination realities
It is existing.
Software module can be disposed in the storage medium of arbitrary format, and such as RAM (deposit by random access
Reservoir), flash memory, ROM (read-only storage), EPROM (erasable programmable ROM), EEPROM
(electrically erasable ROM), register, hard disk, removable disk and CD-ROM.
This storage medium is connected to processor so that processor can to the storage medium write information or
From the read information.This storage medium can also be accumulated within a processor.This storage is situated between
Matter and processor can be disposed in ASIC.This ASIC can be disposed in base station 900 and LTE
In mobile station 1000,1100.As discrete assembly, this storage medium and processor can be disposed in
In base station 900 and LTE mobile stations 1000,1100.
Therefore, the present invention is explained in detail by using above-described embodiment；However, those skilled in the art
It should understand that the invention is not restricted to the embodiment of resonable explanation.The present invention is without departing substantially from being defined by the claims
Correction, modification pattern is may be implemented as in the case of the scope of the present invention.Therefore, specification
Description is intended merely to explain example, and does not apply any limitation to the present invention.
Claims (20)
1. a kind of scheduling vector generation method performed by base station, including：
Obtain the machine type carried out data transmission in current transmission time interval (TTI) on each subband
The code check of type communication (MTC) mobile station；
Public MTC scheduling vectors are generated according to the code check obtained；
The public MTC scheduling vectors are notified to all LTE mobile stations for being connected to the base station.
2. the method as described in claim 1, in addition to：
A part of modulation system is selected from multiple modulation systems as candidate modulation mode in advance, wherein
The MTC mobile stations use a modulation system in candidate modulation mode in data transfer.
3. method as claimed in claim 2, in addition to：
A part of code check is selected as candidate's code check from the multiple code checks of candidate modulation mode correspondence in advance,
Wherein
The MTC mobile stations use a code check in candidate's code check in data transfer.
4. the method as described in claim 1, in addition to：
The public MTC wireless networks of all LTE mobile stations of the generation for being connected to the base station are interim
Mark；
Notify that the public MTC wireless networks are interim to all LTE mobile stations for being connected to the base station
Mark；
The public MTC scheduling vectors are added by the public MTC Radio Network Temporary Identifiers
Disturb, wherein
It is described to notify the public MTC scheduling vectors to all LTE mobile stations for being connected to the base station
Including：
The public MTC broadcasted to all LTE mobile stations for being connected to the base station after row scrambling is adjusted
Degree vector.
5. the method as described in claim 1, in addition to：
Identified for the MTC mobile station distributions user for being connected to the base station；
Marked according to the user of the MTC mobile stations carried out data transmission in current TTI on each subband
Know generation mobile station identification vector；And
The mobile station identification vector is notified to all LTE mobile stations for being connected to the base station.
6. a kind of method for eliminating serial interference performed by LTE mobile stations, including：
Pair modulation system of machine type communication (MTC) mobile station matched with the LTE mobile stations is entered
Row blind check, to determine the modulation system for the MTC mobile stations matched with the LTE mobile stations；
According to the public MTC scheduling vectors notified from base station, it is determined that matched with the LTE mobile stations
The code check of MTC mobile stations, wherein the public MTC scheduling vectors include indicate in current TTI
The code rate information of the code check of the MTC mobile stations carried out data transmission on each subband；And
According to identified modulation system and code check, to the MTC for being matched with the LTE mobile stations
The data of mobile station carry out serial interference elimination.
7. method as claimed in claim 6, in addition to：
Caching be connected to the base station MTC mobile stations user mark and for user mark pair
The data for the MTC mobile stations answered；
According to the mobile station identification vector notified from base station, obtain in current TTI and carried out on each subband
User's mark of the MTC mobile stations of data transfer；
The data of caching corresponding with the user's mark obtained are determined whether there is, wherein
When the data that presence is corresponding with the user's mark obtained, cache, determined by the basis
Modulation system and code check, the data to the MTC mobile stations for being matched with the LTE mobile stations are carried out
Serial interference elimination includes：
It is pair corresponding, slow with the user's mark obtained according to identified modulation system and code check
The data deposited carry out serial interference elimination.
8. method as claimed in claim 7, in addition to：
When in the absence of user's mark with being obtained is corresponding, caching data when, it is described according to being determined
Modulation system and code check, the data to the MTC mobile stations for being matched with the LTE mobile stations enter
Row serial interference elimination includes：
Detect the data for the corresponding MTC mobile stations of user's mark with being obtained；
According to identified modulation system and code check, pair carrying out serial interference with the data that are detected disappears
Remove.
9. method as claimed in claim 8, in addition to：
After data of the detection for MTC mobile stations corresponding with the user's mark obtained, according to
The data detected update the data of caching.
10. method as claimed in claim 7, wherein
According to the maximum number for the MTC mobile stations that the base station is connectable in a TTI, really
It is scheduled on the buffer size of cache user mark and data in the LTE mobile stations；And
The size of the mobile station identification vector in a TTI with being connectable to the base station
The maximum number of MTC mobile stations is corresponding.
11. a kind of base station, including：
Code check acquiring unit, is configured to obtain in current transmission time interval (TTI) on each subband
The code check of machine type communication (MTC) mobile station carried out data transmission；
Scheduling vector generation unit, is configured to generate public MTC scheduling vectors according to the code check obtained；
Transmitting element, is configured to notify described public to all LTE mobile stations for being connected to the base station
MTC scheduling vectors.
12. base station as claimed in claim 11, in addition to：
Modulation system selecting unit, is configured to select a part of modulation system from multiple modulation systems in advance
As candidate modulation mode, wherein
The MTC mobile stations use a modulation system in candidate modulation mode in data transfer.
13. base station as claimed in claim 12, in addition to：
Code rate selection unit, is configured to select one from the multiple code checks of candidate modulation mode correspondence in advance
Part code check is used as candidate's code check；
The MTC mobile stations use a code check in candidate's code check in data transfer.
14. base station as claimed in claim 11, in addition to：
Identification generation unit, is configured to generation for the public affairs for all LTE mobile stations for being connected to the base station
Common MTC Radio Network Temporary Identifiers；
Vector processing unit, is configured to by the public MTC Radio Network Temporary Identifiers to the public affairs
Common MTC scheduling vectors are scrambled, wherein
The transmitting element broadcasts public after row scrambling to all LTE mobile stations for being connected to the base station
MTC scheduling vectors, and notify the public MTC to all LTE mobile stations for being connected to the base station
Radio Network Temporary Identifier.
15. base station as claimed in claim 11, in addition to：
Allocation unit is identified, is configured to mark for the MTC mobile station distributions user for being connected to the base station
Know；
Mark vector generation unit, is configured to pass in the enterprising row data of each subband according in current TTI
User's mark generation mobile station identification vector of defeated MTC mobile stations, wherein
The transmitting element is additionally configured to notify the shifting to all LTE mobile stations for being connected to the base station
Dynamic station identification vector.
16. a kind of LTE mobile stations include：
Modulation system determining unit, is configured to pair machine type communication matched with the LTE mobile stations
(MTC) modulation system of mobile station carries out blind check, to determine the MTC matched with the LTE mobile stations
The modulation system of mobile station；
Code check determining unit, is configured to according to the public MTC scheduling vectors notified from base station, it is determined that with
The code check of the MTC mobile stations of the LTE mobile stations pairing, wherein the public MTC scheduling vectors bag
Include the code of the code check for the MTC mobile stations for indicating to carry out data transmission in current TTI on each subband
Rate information；And
Serial interference elimination unit, is configured to according to identified modulation system and code check, to for institute
The data for stating the MTC mobile stations of LTE mobile stations pairing carry out serial interference elimination.
17. mobile station as claimed in claim 16, in addition to：
Buffer unit, be configured to cache the MTC mobile stations for being connected to the base station user's mark and
Data for MTC mobile stations corresponding with user's mark；
Mark acquiring unit, is configured to, according to the mobile station identification vector notified from base station, obtain current TTI
In carry out data transmission on each subband MTC mobile stations user mark；
Data determination unit, is configured to determine whether there is, caching corresponding with the user's mark obtained
Data, wherein
When the data that presence is corresponding with the user's mark obtained, cache, the serial interference elimination
Unit modulation system and code check determined by, it is pair corresponding with the user's mark obtained, cache
Data carry out serial interference elimination.
18. mobile station as claimed in claim 17, in addition to：
Detection unit, be configured to when in the absence of user's mark with being obtained it is corresponding, caching data when,
The data for the corresponding MTC mobile stations of user's mark with being obtained are detected, wherein
The serial interference elimination unit modulation system and code check determined by, pair with the number that is detected
According to progress serial interference elimination.
19. mobile station as claimed in claim 18, wherein
Number of the buffer unit in detection for MTC mobile stations corresponding with the user's mark obtained
After, the data of caching are updated according to the data detected.
20. mobile station as claimed in claim 17, wherein
According to the maximum number for the MTC mobile stations that the base station is connectable in a TTI, really
The size of memory space in the fixed buffer unit；And
The size of the mobile station identification vector in a TTI with being connectable to the base station
The maximum number of MTC mobile stations is corresponding.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610124235.0A CN107154905A (en) | 2016-03-04 | 2016-03-04 | Scheduling vector generation method, method for eliminating serial interference, base station and mobile station |
| JP2018546028A JP2019512925A (en) | 2016-03-04 | 2017-03-03 | Scheduling vector generation method, successive interference cancellation method, base station, and mobile station |
| PCT/CN2017/075514 WO2017148427A1 (en) | 2016-03-04 | 2017-03-03 | Scheduling vector generation method, successive interference cancellation method, base station, and mobile station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610124235.0A CN107154905A (en) | 2016-03-04 | 2016-03-04 | Scheduling vector generation method, method for eliminating serial interference, base station and mobile station |
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| US10574417B2 (en) * | 2013-03-04 | 2020-02-25 | Qualcomm Incorporated | Method and apparatus for MTC device association schemes |
| KR101812393B1 (en) * | 2013-03-25 | 2017-12-26 | 후지쯔 가부시끼가이샤 | Radio communication system, base station, radio communication apparatus, and radio communication method |
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