CN102347823A - Merging feedback and instruction method, device and system for answer information - Google Patents
Merging feedback and instruction method, device and system for answer information Download PDFInfo
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Abstract
The invention discloses a merging feedback and instruction method, a device and a system for answer information, which are used for merging and feeding back the answer information on the basis of a feedback window in a long term evolution-advanced (LTE-A) system. The merging feedback method comprises the following steps that: user equipment (UE) merges and feeds back data receiving conditions in the feedback window to a base station side in a mode of not feeding back answer information but feeding back ACK/NACK information according to the preset configuration information so that the base station side can obtain the data receiving state of the UE in time, in addition, when the data receiving is abnormal, the corresponding processing is carried out through adopting the accurate strategy in time, so the fault tolerance capability of the system is improved, and the performance and the service quality of the system are also improved. The invention simultaneously provides a merging feedback device and a system for the answer information and provides a merging feedback and instruction method of the answer information, and a corresponding device and a system.
Description
Technical field
The present invention relates to the communications field, particularly a kind of merging feedback of response message and indicating means thereof, Apparatus and system.
Background technology
Advanced Long Term Evolution (Long Term Evolution-Advanced LTE-Advanced) in the system, is called for short the LTE-A system, is to support the system bandwidth wideer than LTE system, like 100MHz, normally adopts following two kinds of spectrum allocation may modes:
A kind of is to adopt the mode of single-frequency spectral directly to distribute the frequency spectrum of 100M bandwidth, specifically as shown in Figure 1.
Another kind is the mode that adopts spectrum aggregating, becomes 100M bandwidth confession system to use the spectrum aggregating of distributing to existing system, specifically as shown in Figure 2.
As shown in Figure 2, when adopting the spectrum aggregating mode, the up-downgoing carrier wave can asymmetricly dispose in the LTE-A system, and promptly user terminal can take N >=1 carrier wave and carries out downlink transfer, takies M >=1 carrier wave and carries out uplink.When the data on each descending carrier are independently carried out coding and decoding; User terminal will carry out mixed self-adapting (HARQ) repeat requests respectively to the packet on each carrier wave; The i.e. correct response/non-correct response (ACK/NACK information) of feedback; Therefore, user terminal can feed back a plurality of ACK/NACK information to base station side simultaneously in a sub-frame of uplink.
At present; Formulated following scheme among the agreement Rel-8 of the LTE system that standardization effort has been accomplished basically: to Frequency Division Duplexing (FDD) (Frequency Division Duplexing; FDD) system and time division duplex (TimeDivision Duplexing; TDD) work of each in system carrier wave; Defined downlink signaling, downlink data, up signaling and upstream data respectively, and transmission relation each other, wherein; The FDD system schematic as shown in Figure 3, the TDD system schematic is as shown in Figure 4.When having opened the HARQ function in the descending transmission; User terminal is after having accomplished demodulation to the last data of descending sub frame n '=n-5, decoding; The signaling that will whether need retransmit in the data on this descending sub frame of base station side feedback on the sub-frame of uplink n (is ACK/NACK; Wherein ACK is with ' 1 ' expression; This moment, data correctly received, and did not retransmit; NACK is with ' 0 ' expression, and this moment, the data decoding mistake needed to retransmit).For FDD system, k=4.For the TDD system, k ∈ K, the uplink-downlink configuration of value and the system of set K and concrete subframe are numbered relevant, as shown in table 1, and for example, uplink-downlink configuration is 3 o'clock, is numbered 2 subframe for subframe, and its K value can be chosen for 7,6,11.
Table 1
In above-mentioned table 1, K can have a plurality of values, is designated as K:{k
0, k
1... K
M-1; When a plurality of radio frames sequence arrangement; Even last subframe is k among the radio frames a; Then first subframe is k+1 among the radio frames a+1; Table 1 is the value condition that example has provided the pairing K of each sub-frame of uplink with a radio frames, wherein the descending sub frame in the last radio frames of expression of n-k＜0.
In the LTE-A system, tentatively confirm to continue to use scheme feeding back ACK/nack message of formulating among the Rel-8.And the LTE-A system can support 5 carrier waves to carry out polymerization at present at most, hereinafter, need in same sub-frame of uplink, carry out a plurality of descending carriers and the descending sub frame of ACK/NACK feedback information, abbreviates " feedback window " as.For the FDD system, the big or small L=N of feedback window, N are the descending carrier quantity of user terminal polymerization.For the TDD system, the big or small L=N * M of feedback window, wherein N is the descending carrier quantity of user terminal polymerization; The descending sub frame quantity of M for feeding back at same sub-frame of uplink; For different uplink-downlink configuration and sub-frame of uplink numbering, the value of M is different, i.e. the quantity of K in each hurdle in the table 1.
In the LTE-A system, when carrying out many code words (code word) transmission, through the usage space multiplex technique, on same physical resource, multiplexing transmission belongs to same user's multiplex data stream.In one sub-frame, the data on the different data flow will independently be encoded, and become code word.At this moment, the ACK/NACK information of feedback will produce based on code word, promptly to obtaining independently ACK/NACK information of 1bit behind each codeword decoding.In the system that adopts carrier aggregation technology; The ACK/NACK information that needs feedback in sub-frame of uplink; Come from a plurality of descending sub frames in a plurality of descending carriers; Promptly a sub-frame of uplink need feed back 2*M*C ACK/NACK information at most; Wherein M is the corresponding descending sub frame quantity of each sub-frame of uplink in the table 1, and C is polymerization carrier number (supposing that each carrier wave uplink-downlink configuration is identical).
For power not limited users terminal (below be called UE), in order to guarantee the efficient of system descending transmission, UE should feed back many bit ACK/nack messages respectively to the descending carrier of actual schedule in the feedback window; For the UE of power limited,, feed back again after then many bit ACK/nack message need being merged for guaranteeing the covering of up channel.Yet, at present about the LTE-A systematic research, merge the scheme that feedback does not also have formulation to be correlated with for how carrying out ACK/NACK information.
Summary of the invention
The embodiment of the invention provides a kind of merging feedback and indicating means thereof, Apparatus and system of response message, in order in the LTE-A system, to realize the merging feedback of response message based on feedback window.
The concrete technical scheme that the embodiment of the invention provides is following:
The merging feedback indication method of response message in a kind of LTE-A system comprises:
The down dispatch information of user terminal is confirmed in the base station, carries downlink data packet number DAI in this down dispatch information;
Said down dispatch information is sent to user terminal in the base station, and the descending carrier number that is scheduled that indicating user terminal is provided with based on the said DAI of correspondence merges the feedback response message to base station side.
The merging feedback method of response message in a kind of LTE-A system comprises:
User terminal receives the down dispatch information that carries downlink data packet number DAI that the base station adopts said method to send, and based on the said DAI descending carrier number of confirming to be scheduled;
User terminal receives data through each descending carrier that is scheduled, and judges whether lose descending carrier in the feedback window;
If user terminal confirms to lose in the feedback window descending carrier according to judged result, then not to the base station feedback response message;
If user terminal confirms not lose in the feedback window descending carrier according to judged result; Then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
The merging of response message feedback indicating device in a kind of LTE-A system comprises:
Confirm the unit, be used for confirming the down dispatch information of user terminal, carry downlink data packet number DAI in this down dispatch information;
Communication unit is used for sending said down dispatch information to user terminal, and the descending carrier number that is scheduled that indicating user terminal is provided with based on the said DAI of correspondence merges the feedback response message to base station side.
The merging feedback device of response message in a kind of LTE-A system comprises:
Communication unit is used to receive the down dispatch information that carries downlink data packet number DAI that said apparatus sends, and based on the said DAI descending carrier number of confirming to be scheduled;
Processing unit is used for receiving data through each descending carrier that is scheduled, and judges whether lose descending carrier in the feedback window;
Feedback unit is used for when confirming that according to judged result feedback window is lost descending carrier, not to the base station feedback response message; And when confirming not lose descending carrier in the feedback window according to judged result; Whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
A kind of LTE-A system that supports the merging feedback indication of response message; Comprise base station and user terminal; Wherein, Said base station is used for confirming the down dispatch information of user terminal; Carry downlink data packet number DAI in this down dispatch information; And sending said down dispatch information to user terminal, the descending carrier number that is scheduled that indicating user terminal is provided with based on the said DAI of correspondence merges the feedback response message to base station side.
A kind of LTE-A that supports the merging feedback of response message; It is characterized in that; Comprise base station and user terminal; Wherein, Said user terminal is used to receive the down dispatch information that carries downlink data packet number DAI that send above-mentioned base station; Based on the said DAI descending carrier number of confirming to be scheduled; And each descending carrier reception data by being scheduled; And judge whether lose descending carrier in the feedback window; If confirm to lose in the feedback window descending carrier according to judged result; Then not to the base station feedback response message; If confirm not lose in the feedback window descending carrier according to judged result; Then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If, then to the base station feedback nack message, otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
In the embodiment of the invention, in the LTE-A system, after UE receives the DAI that sends the base station, according to the DAI descending carrier number of confirming to be scheduled, and receive data, and judge whether lose descending carrier in the feedback window through each descending carrier that is scheduled; If confirm to lose in the feedback window descending carrier, then not to the base station feedback response message according to judged result; If confirm not lose in the feedback window descending carrier according to judged result; Then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.Like this; UE is not just through feeding back the mode of response message, feeding back ACK/nack message; The merging of Data Receiving situation in the feedback window is fed back to base station side; Make base station side can in time know the data receiving state of UE; And take place when unusual in Data Receiving; Adopt in time accurately that strategy carries out handled, thereby improved system survivability to a great extent, also promoted the performance and the service quality of system.
Description of drawings
Fig. 1 is the prior art spectrum systems sketch map that places an order;
Fig. 2 is a spectrum aggregating system schematic under the prior art;
Fig. 3 is a FDD system schematic under the prior art;
Fig. 4 is a TDD system schematic under the prior art;
Fig. 5 is a LTE-A Solution Architecture sketch map in the embodiment of the invention;
Fig. 6 A is a base station functions structural representation in the embodiment of the invention;
Fig. 6 B is a UE illustrative view of functional configuration in the embodiment of the invention;
Fig. 7 carries out response message for base station in the embodiment of the invention and merges feedback indication flow chart;
Fig. 8 is that the descending carrier based on the TDD technology is dispatched sketch map in the embodiment of the invention;
Fig. 9 and Figure 10 are that the descending carrier based on the FDD technology is dispatched sketch map in the embodiment of the invention;
Figure 11 merges process of feedback figure for UE in the embodiment of the invention carries out response message to the base station.
Embodiment
In the embodiment of the invention; In the LTE-A system; In order to realize the merging feedback indication of response message; Intrasystem base station is sent to user terminal and is carried downlink data packet number (Downlink AssignmentIndex; DAI) down dispatch information; Indicating user terminal merges the feedback response message based on the descending carrier number that is scheduled to should DAI being provided with to base station side.Simultaneously; In order to realize the merging feedback of response message; In the embodiment of the invention; Intrasystem usefulness terminal in every family receives the down dispatch information that carries DAI that send above-mentioned base station; Based on this DAI descending carrier number of confirming to be scheduled; And each descending carrier reception data through being scheduled; And judge whether lose descending carrier in the feedback window; If confirm to lose in the feedback window descending carrier according to judged result; Then not to the base station feedback response message; If confirm not lose in the feedback window descending carrier according to judged result, then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result, if; Then to the base station feedback nack message; Otherwise, according to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Consult shown in Fig. 5, Fig. 6 A and Fig. 6 B, in the embodiment of the invention, be used to carry out comprise several base stations and user terminal in the system that response message merges feedback and indication (like, LTE-A system), wherein,
Consult shown in Fig. 6 A, the base station comprises confirms unit 60 and communication unit 61, wherein,
Confirm unit 60, be used for confirming the down dispatch information of user terminal, carry DAI in this down dispatch information;
Communication unit 61 is used for sending down dispatch information to user terminal, and the descending carrier number that is scheduled that indicating user terminal is provided with based on corresponding DAI merges the feedback response message to base station side.
Wherein, if system adopts the TDD technology, then communication unit 61 carries corresponding D AI respectively in the descending carrier that is scheduled in each wireless sub-frame when the down dispatch information of DAI is carried in the user terminal transmission.If system adopts the FDD technology, then communication unit 61 carries corresponding D AI respectively in each descending carrier that is scheduled when the down dispatch information of DAI is carried in the user terminal transmission.
Shown in Fig. 6 A; Comprise further in the base station that being used in the TDD system, being provided with first of mapping relations between DAI and the descending carrier scheduling number is provided with unit 62, and second of mapping relations between DAI and the descending carrier scheduling number are set in the FDD system unit 63 is set.First is provided with unit 62 and second is provided with the concrete set-up mode of carrying out unit 63 and will in the subsequent implementation example, describes in detail.
Consult shown in Fig. 6 B, user terminal comprises communication unit 600, processing unit 601 and feedback unit 602, wherein
Communication unit 600 is used to receive the down dispatch information that carries DAI that send base station shown in Fig. 6 A, and based on the said DAI descending carrier number of confirming to be scheduled;
Processing unit 601 is used for receiving data through each descending carrier that is scheduled, and judges whether lose descending carrier in the feedback window;
Feedback unit 602 is used for when confirming that according to judged result feedback window is lost descending carrier, not to the base station feedback response message; And when confirming not lose descending carrier in the feedback window according to judged result; Whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
Wherein, the concrete mode of the various response messages of feedback unit 602 execution feedbacks will describe in detail in the subsequent implementation example.
Based on the said system framework, consult shown in Figure 7ly, during the present invention implemented, the detailed process of merging feedback indication of response message is carried out in the base station to user terminal (below be called UE) following:
Step 700: the down dispatch information of user terminal is confirmed in the base station, carries DAI in this down dispatch information.
Step 710: down dispatch information is sent to user terminal in the base station, and the descending carrier number that is scheduled that indicating user terminal is provided with based on corresponding DAI merges the feedback response message to base station side.
In the present embodiment, corresponding DAI is provided with when being scheduled the descending carrier number accordingly, is divided into following two kinds of situation:
Under first kind of situation; For the TDD system; The DAI of the 2bits in the down dispatch information of formulating among the Rel-8 of LTE system (DL grant) is reused in the base station; Dispatch several descending carriers altogether in the current descending sub frame of notice UE and carried out transfer of data; Being the base station sends when carrying the down dispatch information of DAI to UE, carries corresponding D AI respectively in the descending carrier that is scheduled in each wireless sub-frame.For example, consult shown in Figure 8ly, the base station has been dispatched descending carrier and has been carried out transfer of data on descending sub frame 1, descending sub frame 3, descending sub frame 4, dispatched 3 descending carriers in the descending sub frame 1 altogether, then the DAI=3 that carries in the descending sub frame 1; Dispatched 1 descending carrier in the descending sub frame 3; The DAI=1 that carries in the descending sub frame 3 then; And 2 descending carriers have been dispatched in the descending sub frame 4; The DAI=2 that carries in the descending sub frame 4 then; Wherein, The descending carrier of dispatching in each descending sub frame can be downlink sharied signal channel (Physical Downlink SharedChannel, PDSCH).
In the present embodiment, in the TDD system, because DAI has only 2bits; And the descending carrier number of UE polymerization is N in the system, and N gets natural number, aggregate maximum carrier number T≤N that system can support; Then corresponding DAI is provided with when being scheduled the descending carrier number accordingly, comprises but is not limited to following mode:
In four kinds of values that DAI characterizes, set the respectively corresponding b1 kind descending carrier scheduling of any a1 value number, and set the respectively corresponding b1-1 kind descending carrier scheduling of other 4-a1 values number; Wherein, a1=(T-1) mod 4+1, b1=ceil (T/4), T are the aggregate maximum carrier number that system can support, and mod is for getting surplus operation, and ceil is the capping operation.
For example, suppose T=4, a1=4 then, b1=1 so, consults shown in the table 2, and when the value of DAI was " 00 ", " 01 ", " 10 ", " 11 ", the expression descending carrier number that is scheduled was 1,2,3,4 respectively.Certainly, table 2 only is giving an example of a kind of situation, is not limited to this a kind of set-up mode.
Table 2
Again for example, suppose T=5, a=1 then, b=2; So, consult shown in the table 3, when the value of DAI is " 00 "; Then the expression descending carrier number that is scheduled is 1 or 5, and the value of DAI is when be " 01 ", " 10 ", " 11 ", and the descending carrier number of then representing respectively to be scheduled is 2,3,4.
Table 3
Certainly; T=5; A1=1; During b1=2; The four kinds of values of DAI and the mapping relations that are scheduled between the descending carrier number also can be set to the form shown in table 4 or the table 5; Concrete set-up mode is decided in its sole discretion according to actual application environment by administrative staff, and following examples are all like this, will repeat no more at this.
Table 4
Table 5
Again for example, suppose T=10, then a1=2; B1=3; So, consult shown in the table 6, when the value of DAI is " 00 "; The descending carrier number of then representing to be scheduled is 1 or 2 or 3; The value of DAI is when " 01 ", then the expression descending carrier number that is scheduled is 4 or 5 or 6, and when the value of DAI be " 10 ", the descending carrier number of then representing to be scheduled was 7 or 8; And the DAI value is when being " 11 ", and then the expression descending carrier number that is scheduled is 9 or 10.Wherein, three kinds of corresponding respectively descending carrier numbers that are scheduled of " 00 " and " 01 " have nothing in common with each other, and in like manner, two kinds of corresponding respectively number of lines that are scheduled down of " 10 " and " 11 " also have nothing in common with each other.Certainly, the mapping relations shown in the table 6 only are a kind of giving an example, and do not limit other set-up modes.
Table 6
Be different from above-mentioned first kind of situation; Under second kind of situation; For the FDD system; Also can in down dispatch information (DL grant), carry DAI; The descending carrier scheduling number that notice UE is current; Being the base station sends when carrying the down dispatch information of DAI to UE, in each descending carrier that is scheduled, carries corresponding D AI respectively.
Different with the TDD system, for reducing signaling consumption, DAI can comprise the 1bit data, also can comprise the 2bits data.
If DAI comprises the 1bit data; Then base station descending carrier that system can be dispatched is divided at least two groups (preferable ,≤three groups), and the descending carrier number that comprises in every group is not more than 2; And, set the corresponding respectively a kind of descending carrier scheduling number of two kinds of values that DAI characterizes to each group descending carrier.
For example, consult shown in Figure 9ly, have 5 polymerization descending carriers in the supposing the system, the base station is divided into it 3 groups in advance so, and wherein, descending carrier 1 is first group with descending carrier 2, and descending carrier 3 is second group with descending carrier 4, and descending carrier 5 is the 3rd group.2 descending carriers in first group all are scheduled, then corresponding DAI=2; Have only 1 descending carrier to be scheduled in second group, then corresponding DAI=1; 1 descending carrier in the 3rd group is scheduled, then corresponding DAI=1.And the two kinds of values of the DAI of 1bit and the mapping relations that are scheduled between the descending carrier number can be set to the form shown in the table 7, but only for for example, are not limited thereto.
Table 7
If DAI comprises the 2bit data; Then base station descending carrier that system can be dispatched is divided at least two groups; The descending carrier number that comprises in every group is not more than 4, and to each group descending carrier, sets the corresponding respectively a kind of descending carrier scheduling number of four kinds of values that DAI characterizes.
For example, consult shown in Figure 10ly, have 5 polymerization descending carriers in the supposing the system, the base station is divided into it 2 groups in advance so, and wherein, descending carrier 1, descending carrier 2, descending carrier 3 and descending carrier 4 are first group, and descending carrier 5 is second group.There are 3 descending carriers to be scheduled in first group, then corresponding DAI=3; 1 descending carrier in second group is scheduled, then corresponding DAI=1.And the four kinds of values of the DAI of 2bit and the mapping relations that are scheduled between the descending carrier number can be set to the form shown in the table 8, but only for for example, are not limited thereto.
Table 8
Various DAI that put down in writing among the above embodiment and the mapping relations between the descending carrier number of being scheduled are made an appointment by base station side and end side, are present in base station side and end side simultaneously.
Based on the foregoing description, to consult shown in Figure 11ly, in the present embodiment, after UE received the down dispatch information that carries DAI that sends the base station, the detailed process that merges the feedback response message was following:
Step 1100:UE receives the down dispatch information that carries DAI that the base station adopts the method for step 700-step 710 record to send, and based on this DAI descending carrier number of confirming to be scheduled.
Step 1110:UE receives data through each descending carrier that is scheduled, and judges and whether lose descending carrier in the feedback window, if then carry out step 1120; Otherwise, carry out step 1130.
So-called feedback window promptly is meant a plurality of descending carriers and the descending sub frame that in same sub-frame of uplink, carry out the ACK/NACK feedback information.For the TDD system, the big or small L=N * M of feedback window, wherein N is the descending carrier number of UE polymerization, the descending sub frame number of M in same sub-frame of uplink, feeding back.For the FDD system, the big or small L=N of feedback window, N are the descending carrier number of UE polymerization.
In the present embodiment, during UE execution in step 1110, comprise but be not limited to following two kinds of implementations:
First kind: receive before the data/receive in the data procedures/receive after the data; UE (also can adopt other modes based on the DAI that receives with each down dispatch information; Here only for giving an example) judge whether lose descending carrier in the feedback window; If; Then data are not deciphered, do not fed back any information yet to base station side; Otherwise, again data are deciphered and are carried out subsequent treatment.
Second kind: decipher immediately after receiving data; Walk abreast; UE (also can adopt other modes based on the DAI that receives with each down dispatch information; Here only for giving an example) judge whether lose descending carrier in the feedback window; If; Then regardless of the data decoding result, all preferential selection is not fed back any information to base station side; Otherwise, carry out subsequent treatment according to the data decoding result.
In the above-mentioned steps 1100, so-called UE confirms to lose in the feedback window situation that descending carrier is meant that the part descending carrier is lost.For example; Consult shown in Figure 8; In descending sub frame 1; UE receives only the descending carrier 1 and descending carrier 2 that is scheduled, and loses descending carrier 3, and then UE can be according in descending sub frame 1; Confirm to lose descending carrier 3 from descending carrier 1 and DAI and down dispatch information that descending carrier 2 receives; If descending carrier 1, descending carrier 2 and descending carrier 3 are all lost, then UE can not judge and lose descending carrier, and the handled mode of this situation will be introduced in flow.Again for example; Consult shown in Figure 9; In first group of downstream carrier group; If UE receives only the descending carrier 1 that is scheduled; Lose descending carrier 2, then UE can confirm to lose descending carrier 2 according to the DAI and the down dispatch information that receive from descending carrier 1, if descending carrier 1 is all lost with descending carrier 2; Then UE can not judge and lose descending carrier, and the handled mode of this situation also will be introduced in flow.
Step 1120:UE confirms to lose in the feedback window descending carrier according to judged result, then not to the base station feedback response message, i.e. and DTX state.
Step 1130:UE confirms not lose in the feedback window descending carrier according to judged result, then whether further judges in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result, if then carry out step 1140; Otherwise, carry out step 1150.
Step 1140:UE is to the base station feedback nack message.
Step 1150:UE is according to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
In the present embodiment; For the TDD system; The number of the correct descending carrier relevant information that receives in the then above-mentioned feedback window; Number for the correct descending sub frame that receives in the feedback window; And for the FDD system; The number of the correct descending carrier relevant information that receives in the above-mentioned feedback window is the number of the correct downstream carrier group that receives in the feedback window.
When carrying out above-mentioned steps 1140 with step 1150, UE can adopt but be not limited to following dual mode and come feeding back ACK/nack message:
1) adopt the b0 comprise the 2bits data, b1 is to base station side feeding back ACK/nack message, wherein,
At b0, in four kinds of values that b1 characterizes, set the corresponding nack message of any value; And in other values; Set a2 value corresponding b2 kind ACK information respectively, set 3-a2 value corresponding b2-1 kind ACK information respectively, be used for the number of the descending carrier relevant information of indicating correct reception; Wherein, A2=(T-1) mod 3+1, b2=ceil (T/3), T are the aggregate maximum carrier number that system can support; Mod is for getting surplus operation, and ceil is the capping operation.
For example, suppose T=3, then a2=3; B1=1; So, consult shown in the table 9 b0; When the value of b1 is " 00 "; What then represent UE feedback is nack message, b0, the value of b1 be " 01 ", " 10 " and " 11 " time; What then represent the UE feedback is ACK information, and the number of the descending carrier relevant information of the correct reception of indication is respectively 1,2 and 3.Certainly, the mapping relations shown in the table 9 only for for example, are not limited to this a kind of mapping mode, and the various values of the number of the correct descending carrier relevant information that receives shown in the table 9 also can set up on their own according to actual application environment, repeat no more at this.
Table 9
Again for example, suppose T=8, a2=2 then, b2=3 so, consults shown in the table 10, b0, when the value of b1 was " 00 ", what then represent the UE feedback was nack message; B0; When the value of b1 is " 01 ", " 10 " and " 11 "; What then represent the UE feedback is ACK information; And the number of the descending carrier relevant information of the correct reception of " 01 " indication is for being 1 or 2 or 3; The number of the descending carrier relevant information of the correct reception of " 10 " indication is 4 or 5 or 6; The number of the descending carrier relevant information of the correct reception of " 11 " indication is 7 or 8; Obviously, the value of the number of the descending carrier relevant information of " 01 ", " 10 " and " 11 " pairing correct reception has nothing in common with each other.Certainly, the mapping relations shown in the table 10 only for for example, are not limited to this a kind of mapping mode, and the various values of the number of the correct descending carrier relevant information that receives shown in the table 10 also can set up on their own according to actual application environment, repeat no more at this.
Table 10
2) adopt comprise 5 phase-shift keyings (PSK) symbol d (n) to base station side feeding back ACK/nack message, wherein,
In five kinds of values that d (n) characterizes; Set the corresponding nack message of any value, and in other values, set a3 value corresponding b3 kind ACK information respectively; Set 4-a3 value corresponding b3-1 kind ACK information respectively; The number that is used for the descending carrier relevant information of indicating correct reception, wherein, a3=(T-1) mod 4+1; B3=ceil (T/4); T is the aggregate maximum carrier number that system can support, mod is for getting surplus operation, and ceil is the capping operation.
For example, suppose T=4, a3=4 then, b3=1.Then, refer to Table 11, d (n) whose value is "1", the UE indicates a NACK feedback information, d (n) whose value is
and
, it means UE feedback is ACK information, and indicates the correct reception of the information related to the number of downlink carrier 2, 3 and 4, respectively.Certainly, the mapping relations shown in the table 11 only for for example, are not limited to this a kind of mapping mode, and the various values of the number of the correct descending carrier relevant information that receives shown in the table 11 also can set up on their own according to actual application environment, repeat no more at this.
Table 11
As another example, assume that T = 8, then a3 = 2, b3 = 2, then, see Table 12, d (n) whose value is "1", the UE indicates a NACK feedback information; d (n ) whose value is
and
, the UE indicates that the ACK information feedback, and
indicates the correct reception of the downlink carrier of information related to the number of 1 or 2,
indicates the correct information received downlink carrier number is 3 or 4 ,
indicating correct reception of the information related to the number of downlink carriers is 5 or 6,
instructions correctly received information related to the number of downlink carrier is 7 or 8, obviously,
and
corresponding to the correct reception of downlink carrier to take the number of relevant information value is different....Certainly, the mapping relations shown in the table 12 only for for example, are not limited to this a kind of mapping mode, and the various values of the number of the correct descending carrier relevant information that receives shown in the table 12 also can set up on their own according to actual application environment, repeat no more at this.
Table 12
Adopt aforesaid way, UE can feed back to the base station with the merging of the Data Receiving situation in the feedback window through not to the mode of base station feedback response message, feeding back ACK/nack message, carries out corresponding subsequent processing by the base station according to the feedback of UE.Comprise:
After situation 1:UE receives data; Confirm to have at least one descending carrier decoding error in the feedback window, then feed back nack message, after the base station receives nack message; Know the data packet transmission mistake, then all descending carriers that are scheduled in the feedback window are retransmitted.
For example, consult shown in Figure 8ly, suppose to have a descending carrier decoding failure at least, then to base station feedback d (n)=1 in each descending carrier that UE confirms that descending sub frame 1-4 comprises.The data packet transmission mistake is known after receiving d (n)=1 in the base station, and then all descending carriers that are scheduled that all wireless sub-frames in the feedback window are comprised retransmit.
Again for example, consult shown in Figure 9ly, suppose to have a descending carrier decoding failure at least, then to base station feedback d (n)=1 in each descending carrier that UE confirms that downstream carrier group one to three comprises.The data packet transmission mistake is known after receiving d (n)=1 in the base station, and then all descending carriers that are scheduled that all downstream carrier group in the feedback window are comprised retransmit.
Situation 2:UE confirms to have at least in the feedback window descending carrier to lose, then not to the base station feedback response message after receiving data; It is the DTX state; The data packet transmission mistake is known after confirming that UE is the DTX state in the base station, then all descending carriers that are scheduled in the feedback window is retransmitted.
UE confirms to have at least in the feedback window descending carrier to lose to comprise:
For example, consult shown in Figure 8ly, the number of the descending carrier that UE receives in certain descending sub frame is less than the value of the DAI that carries in this descending sub frame;
Again for example, consult shown in Figure 9ly, the number of the descending carrier that UE receives in certain downstream carrier group is less than the value of the DAI that carries in this downstream carrier group.
After situation 3:UE receives data, confirm that the data of reception in the feedback window are all deciphered correctly, then to the corresponding ACK information of base station feedback, all packets are known all by correct reception after receiving ACK information in the base station, do not need to retransmit.
For example, referring to Figure 8, UE determines the received data in the downlink subframes 1, a downlink sub-frame 3, the downlink subframe 4, all the scheduled downlink carrier are decoded correctly, the feedback to the base station
base station receives
after , informed that all packets are received correctly, do not be retransmitted.
As another example, referring to Figure 9, UE determines the data in the received downlink carrier Group 1, the downlink carrier group II group III of the downlink carrier, of all the scheduled downlink carrier are decoded correctly, the feedback to the base station
base station receives
after informed that all packets are received correctly, do not be retransmitted.
After situation 4:UE receives data; Confirm that the data that receive in the feedback window all decipher correctly, then to the corresponding ACK information of base station feedback, after the base station reception ACK information; Know to have the packet of losing, just the descending carrier that all are scheduled in the feedback window is retransmitted.
For example, referring to Figure 8, UE in the feedback window, only the downlink subframe 1 and downlink sub-frame 3, data is received, the downlink subframe 4 lost, and in the downlink subframe 1 and downlink sub-frame 3 in the closed to all downstream carriers are decoded properly, the UE to the base station feedback
base station receives
After informed of a packet loss, the loss of a downlink sub-frame, the feedback window downlink subframes 1, a downlink sub-frame 3 and the downstream subframe 4 contains all the downlink carrier is scheduled for retransmission.
As another example, referring to Figure 9, UE in the feedback window, only the downlink carrier group I and group II received downlink carrier data downlink carrier group of three all lost, and in the downlink carrier downlink carrier group I and group II all received downlink carrier are decoded properly, the UE to the base station feedback
base station receives
after informed that there is packet loss, which lost a downlink carrier group, the feedback window downlink carrier group one, group two and downlink carrier groups of three downlink carrier contains all the downlink carrier is scheduled for retransmission.
In sum, in the embodiment of the invention, in the LTE-A system; After UE receives the DAI that sends the base station; According to the DAI descending carrier number of confirming to be scheduled, and receive data, and judge whether lose descending carrier in the feedback window through each descending carrier that is scheduled; If confirm to lose in the feedback window descending carrier, then not to the base station feedback response message according to judged result; If confirm not lose in the feedback window descending carrier according to judged result; Then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.Like this; UE is not just through to the mode of base station feedback response message, feeding back ACK/nack message; The merging of Data Receiving situation in the feedback window is fed back to base station side; Make base station side can in time know the data receiving state of UE; And take place when unusual in Data Receiving; Adopt in time accurately that strategy carries out handled, thereby improved system survivability to a great extent, also promoted the performance and the service quality of system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from this
Bright spirit and scope.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1. the merging feedback indication method of response message in the LTE-A system is characterized in that, comprising:
The down dispatch information of user terminal is confirmed in the base station, carries downlink data packet number DAI in this down dispatch information;
Said down dispatch information is sent to user terminal in the base station, and the descending carrier number that is scheduled that indicating user terminal is provided with based on the said DAI of correspondence merges the feedback response message to base station side.
2. the method for claim 1 is characterized in that, if system adopts the TDD technology, the down dispatch information that carries DAI is sent to user terminal in then said base station, comprising:
Carry corresponding D AI respectively in the descending carrier that is scheduled of base station in each wireless sub-frame and mail to user terminal.
3. method as claimed in claim 2 is characterized in that, corresponding DAI is provided with when being scheduled the descending carrier number accordingly, comprising:
DAI comprises the 2bits data, in four kinds of values that DAI characterizes, sets the respectively corresponding b1 kind descending carrier scheduling of any a1 value number, and sets the respectively corresponding b1-1 kind descending carrier scheduling of other 4-a1 values number; Wherein, a1=(T-1) mod 4+1, b1=ceil (T/4), T are the aggregate maximum carrier number that system can support, and mod is for getting surplus operation, and ceil is the capping operation.
4. the method for claim 1 is characterized in that, if system adopts the FDD technology, the down dispatch information that carries DAI is sent to user terminal in then said base station, comprising:
The base station is carried corresponding D AI respectively and is mail to user terminal in each descending carrier that is scheduled.
5. method as claimed in claim 4 is characterized in that, corresponding DAI is provided with when being scheduled the descending carrier number accordingly, comprising:
If DAI comprises the 1bit data, then the descending carrier that system can be dispatched is divided at least two groups, and the descending carrier number that comprises in every group is not more than 2, and to each group descending carrier, sets the corresponding respectively a kind of descending carriers scheduling number of two kinds of values that DAI characterizes;
If DAI comprises the 2bit data, then the descending carrier that system can be dispatched is divided at least two groups, and the descending carrier number that comprises in every group is not more than 4, and to each group descending carrier, sets the corresponding respectively a kind of descending carriers scheduling number of four kinds of values that DAI characterizes.
6. the merging feedback method of response message in the LTE-A system is characterized in that, comprising:
User terminal receives the down dispatch information that carries downlink data packet number DAI that the base station adopts the method for claim 1 to send, and based on the said DAI descending carrier number of confirming to be scheduled;
User terminal receives data through each descending carrier that is scheduled, and judges whether lose descending carrier in the feedback window;
If user terminal confirms to lose in the feedback window descending carrier according to judged result, then not to the base station feedback response message;
If user terminal confirms not lose in the feedback window descending carrier according to judged result; Then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
7. method as claimed in claim 6 is characterized in that, user terminal comprises to base station feedback ACK/NACK information:
Employing comprises the b0 of 2bits data, and b1 is to base station feedback ACK/NACK information, wherein,
At b0, in four kinds of values that b1 characterizes, set the corresponding nack message of any value; And in other values; Set a2 value corresponding b2 kind ACK information respectively, set 3-a2 value corresponding b2-1 kind ACK information respectively, be used for the number of the descending carrier relevant information of indicating correct reception; Wherein, A2=(T-1) mod 3+1, b2=ceil (T/3), T are the aggregate maximum carrier number that system can support; Mod is for getting surplus operation, and ceil is the capping operation.
8. method as claimed in claim 6 is characterized in that, user terminal comprises to base station feedback ACK/NACK information:
Employing comprises the symbol d (n) of 5 phase-shift keyings to base station feedback ACK/NACK information, wherein,
In five kinds of values that d (n) characterizes; Set the corresponding nack message of any value, and in other values, set a3 value corresponding b3 kind ACK information respectively; Set 4-a3 value corresponding b3-1 kind ACK information respectively; The number that is used for the descending carrier relevant information of indicating correct reception, wherein, a3=(T-1) mod 4+1; B3=ceil (T/4); T is the aggregate maximum carrier number that system can support, mod is for getting surplus operation, and ceil is the capping operation.
9. the merging of response message feedback indicating device in the LTE-A system is characterized in that, comprising:
Confirm the unit, be used for confirming the down dispatch information of user terminal, carry downlink data packet number DAI in this down dispatch information;
Communication unit is used for sending said down dispatch information to user terminal, and the descending carrier number that is scheduled that indicating user terminal is provided with based on the said DAI of correspondence merges the feedback response message to base station side.
10. device as claimed in claim 9; It is characterized in that; If system adopts the TDD technology, when then said communication unit carries the down dispatch information of DAI to the user terminal transmission, carry corresponding D AI respectively in the descending carrier that is scheduled in each wireless sub-frame.
11. device as claimed in claim 10 is characterized in that, further comprises:
First is provided with the unit, and be used for corresponding DAI the descending carrier number that is scheduled accordingly is set, wherein,
DAI comprises the 2bits data, in four kinds of values that DAI characterizes, sets the respectively corresponding b1 kind descending carrier scheduling of any a1 value number, and sets the respectively corresponding b1-1 kind descending carrier scheduling of other 4-a1 values number; Wherein, a1=(T-1) mod 4+1, b1=ceil (T/4), T are the aggregate maximum carrier number that system can support, and mod is for getting surplus operation, and ceil is the capping operation.
12. device as claimed in claim 9 is characterized in that, if system adopts the FDD technology, when then said communication unit carries the down dispatch information of DAI to the user terminal transmission, in each descending carrier that is scheduled, carries corresponding D AI respectively.
13. device as claimed in claim 12 is characterized in that, further comprises:
Second is provided with the unit, and be used for corresponding DAI the descending carrier number that is scheduled accordingly is set, wherein,
If DAI comprises the 1bit data; Then said second is provided with the descending carrier that the unit can be dispatched by system is divided at least two groups; The descending carrier number that comprises in every group is not more than 2, and to each group descending carrier, sets the corresponding respectively a kind of descending carrier scheduling number of two kinds of values that DAI characterizes;
If DAI comprises the 2bit data; Then said second is provided with the descending carrier that the unit can be dispatched by system is divided at least two groups; The descending carrier number that comprises in every group is not more than 4, and to each group descending carrier, sets the corresponding respectively a kind of descending carrier scheduling number of four kinds of values that DAI characterizes.
14. the merging feedback device of response message is characterized in that in the LTE-A system, comprising:
Communication unit is used to receive the down dispatch information that carries downlink data packet number DAI that device as claimed in claim 10 sends, and based on the said DAI descending carrier number of confirming to be scheduled;
Processing unit is used for receiving data through each descending carrier that is scheduled, and judges whether lose descending carrier in the feedback window;
Feedback unit is used for when confirming that according to judged result feedback window is lost descending carrier, not to the base station feedback response message; And when confirming not lose descending carrier in the feedback window according to judged result; Whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If; Then to the base station feedback nack message; Otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
15. device as claimed in claim 14; It is characterized in that; Said feedback unit is when base station feedback ACK/NACK information; Employing comprises the b0 of 2bits data; B1 is to base station feedback ACK/NACK information; Wherein, At b0, in four kinds of values that b1 characterizes, said feedback unit is set the corresponding nack message of any value; And in other values; Set a2 value corresponding b2 kind ACK information respectively, set 3-a2 value corresponding b2-1 kind ACK information respectively, be used for the number of the descending carrier relevant information of indicating correct reception; Wherein, A2=(T-1) mod 3+1, b2=ceil (T/3), T are the aggregate maximum carrier number that system can support; Mod is for getting surplus operation, and ceil is the capping operation.
16. device as claimed in claim 14; It is characterized in that; Said user terminal is when base station feedback ACK/NACK information; Employing comprises the symbol d (n) of 5 phase-shift keyings to base station feedback ACK/NACK information; Wherein, In five kinds of values that d (n) characterizes; Said feedback unit is set the corresponding nack message of any value; And in other values; Set a3 value corresponding b3 kind ACK information respectively, set 4-a3 value corresponding b3-1 kind ACK information respectively, be used for the number of the descending carrier relevant information of indicating correct reception; Wherein, A3=(T-1) mod 4+1, b2=ceil (T/4), T are the aggregate maximum carrier number that system can support; Mod is for getting surplus operation, and ceil is the capping operation.
17. LTE-A system that supports the merging feedback indication of response message; It is characterized in that; Comprise base station and user terminal; Wherein, The down dispatch information that said base station is used for confirming user terminal carries downlink data packet number DAI, and sends said down dispatch information to user terminal in this down dispatch information; The descending carrier number that is scheduled that indicating user terminal is provided with based on the said DAI of correspondence merges the feedback response message to base station side.
18. LTE-A system that supports the merging feedback of response message; It is characterized in that; Comprise base station and user terminal; Wherein, Said user terminal is used to receive the down dispatch information that carries downlink data packet number DAI that send base station as claimed in claim 18; Based on the said DAI descending carrier number of confirming to be scheduled; And each descending carrier reception data by being scheduled; And judge whether lose descending carrier in the feedback window; If confirm to lose in the feedback window descending carrier according to judged result; Then not to the base station feedback response message; If confirm not lose in the feedback window descending carrier according to judged result; Then whether further judge in each descending carrier that is scheduled in the feedback window arbitrary code word generation decoding error according to the data decoding result; If, then to the base station feedback nack message, otherwise; According to the number of the correct descending carrier relevant information that receives in the feedback window, to the corresponding ACK information of base station feedback.
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