Background technology
Relaying (Relay) technology as a kind of emerging technology, has caused more and more widely and has noted, has been regarded as the key technology of B3G/4G.Because future wireless system or cellular system require to improve the network coverage, support higher rate transmission, this has proposed new challenge to wireless communication technology.Meanwhile, the cost issues of system building and maintenance is more outstanding.Along with the increase of transmission rate and communication distance, it is outstanding that the energy consumption issues of battery also becomes, and following radio communication will adopt higher frequency, and the pathloss attenuation causing is thus more serious.By relaying technique, traditional one hop link can be divided into multiple multi-hop links, due to Distance Shortened, this will greatly reduce path loss, contribute to improve transmission quality, expand communication range, thereby provide quicker better service for user.
Introducing relay station (Relay Node, RN) in network, as shown in Figure 1, base station in network (eNB) and macrocell user (Macro User Equipment, M-UE) link between is called the link that direct transfers (Direct Link), link between base station and relay station is called back haul link, link between relay station and relay domain user (Relay User Equipment, R-UE) is called access link (Access Link).
In LTE system, between eNB and UE, need to set up HARQ process and feed back accordingly for the transmission of signal.When UE receives after the signal of eNB, generate the uplink feedback information to this HARQ process according to the receipt decoding situation of signal, correctly generate ACK feedback information as received, receive the incorrect NACK feedback information that generates, and by the up ACK/NACK information eNB that sends to.ENB is for further processing according to the feedback information receiving, if receive ACK, continues the new data of transmission, if receive NACK, the data that take defeat is transferred to UE again.
Direct transferring on link of LTE system, it is upper that ACK/NACK uplink feedback information is carried on Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel), is divided into PUCCH format1a/1b, as shown in Figure 2 and Figure 3.
In the time that system frame structure adopts general cyclic prefix (Normal Cyclic Prefix), each subframe contains 14 SC-FDMA (Single Carrier-Frequency Division Multiple Access, the multiplexing access of single carrier frequency division) symbol, as shown in Figure 2, be divided into 2 time slots (slot), on each slot, comprise 7 SC-FDMA symbols, between slot, carry out frequency hopping (Hopping).Fig. 2 (a) is ordinary construction, wherein #0, #1, #5, loading ACK/nack message on #6, #7, #8, #12, #13 symbol, on remaining #2, #3, #4, #9, #10, #11 symbol, shine upon pilot tone (RS, Reference Signal) signal, Fig. 2 (b) is for carry the Shortened structure of SRS (Sounding Reference Signal) simultaneously, wherein #0, #1, #5, loading ACK/nack message on #6, #7, #8, #12 symbol, #13 symbols carry SRS, shines upon pilot tone on remaining #2, #3, #4, #9, #10, #11 symbol.
In the time that system frame structure adopts extended cyclic prefix (Extended Cyclic Prefix), every subframe contains 12 SC-FDMA symbols, as shown in Figure 3, be divided into 2 slot, on each slot, comprise 6 SC-FDMA symbols, between slot, carry out frequency hopping (Hopping), Fig. 3 (a) is ordinary construction, #0 wherein, #1, #4, #5, #6, #7, #10, loading ACK/nack message on #11 symbol, remaining #2, #3, #8, on #9 symbol, shine upon RS signal, Fig. 3 (b) is Shortened structure, wherein #0, #1, #4, #5, #6, #7, loading ACK/nack message on #10 symbol, #11 symbols carry SRS, remaining #2, #3, #8, on #9 symbol, shine upon pilot tone.
On Direct Link, M-UE carries out, after the processing such as frequency domain expansion, time domain expansion, being mapped on distributed PUCCH physical resource according to system configuration to the ACK/NACK information generating, and at respective symbol position mapping RS, sends to eNB in addition.Simultaneously, eNB can distribute identical PUCCH physical resource to multiple UE, the frequency domain expansion index CS_index and the time domain expansion index OC_index that use due to each UE have orthogonality, ACK/NACK feedback information that can multiplexing multiple UE on identical PUCCH physical resource, relevant parameter and resource are distributed by eNB configuration indication UE.ENB UE to dispatch service in a subframe transmits a packet, and configuration indication is fed back relevant information to HARQ, be parameter and the resource distribution that ACK/NACK information processing is relevant, UE generates ACK/NACK information after receiving data, and according to configuration indication, the ACK/NACK information of self is processed the up eNB that is transmitted to.
M-UE processes the ACK/NACK information generating according to the configuration indication of eNB and corresponding account form, and step is as follows:
Step 10, configuration indication gets parms
M-UE obtains the configuration indication of eNB to PUCCH relevant parameter:
N
pUCCH (1), for the PUCCH resource index number of loading ACK/NACK feedback information, by high-level signaling configuration indication;
N
cs (1)in mixed RB (mixing Resource Block) for the CS_index quantity of PUCCH format 1/1a/1b, wherein mixed RB refers to be configured for and carries PUCCH format 1/1a/1b and PUCCH format 2/2a/2b, the i.e. RB of channel quality report information (Resource Block) simultaneously;
Δ
shift pUCCH, the value interval of PUCCH format 1/1a/1b frequency domain expansion index CS_index, by high level configuration indication.
N
rB (2), for the bandwidth of PUCCH format 2/2a/2b, take RB as unit, by high level configuration indication.
Step 20, obtains resource distribution
According to above-mentioned configuration parameter, M-UE can obtain according to corresponding computational methods the resource distribution of PUCCH format 1/1a/1b, as follows:
2a) calculate n
pRB
First according to n
pUCCH (1)can obtain RB that the PUCCH format 1/1a/1b channel of configuration is corresponding to call number m:
C be every slot for carrying the SC-FDMA symbolic number of RS, when when normal CP, c value is 3, extended CP, c value is 2, that is:
Further, obtain the RB resource number n of actual physical resources configuration according to m
pRB:
Wherein, n
sfor No. slot in radio frames; N
sc rBfor the contained sub-carrier number of every RB; N
rB uLfor the upstream bandwidth of system configuration, take RB as unit.
2b) calculate n ' (n
s)
According to n
pUCCH (1)calculate n ' (n
s):
N
swhen mod 2=0, i.e. first slot of each subframe
N
swhen mod 2=1, i.e. second of each subframe slot
Wherein,
D=2 when normal CP, d=0 when extended CP
2c) calculate n
oc(n
s)
According to n ' (n
s) can further obtain orthogonal sequence call number (Sequence index) n
oc(n
s):
According to n
oc(n
s) can obtain corresponding orthogonal sequence (Orthogonal sequences) in time domain expansion
in the ordinary construction of
PUCCH format 1/1a/1b, on 2 slot
In the Shortened structure of
PUCCH format 1/1a/1b, on first slot
On second slot
Accordingly
sequence is chosen as table 1, shown in table 2.
Table 1 orthogonal sequence [w (0) ... w (N
sF pUCCH-1)] for
Sequence index n
oc(n
s)
|
Orthogonal sequences [w(0)…w(N
SF PUCCH-1)]
|
0 |
[+1 +1 +1 +1] |
1 |
[+1 -1 +1 -1] |
2 |
[+1 -1 -1 +1] |
Table 2 orthogonal sequence [w (0) ... w (N
sF pUCCH-1)] for
Sequence index n
oc(n
s)
|
Orthogonal sequences [w(0)…w(N
SF PUCCH-1)]
|
0 |
[1 1 1] |
1 |
[1 e
j2π/3 e
j4π/3]
|
2 |
[1 e
j4π/3 e
j2π/3]
|
2d) calculate n
cs(n
s, l)
According to n ' (n
s) can further obtain n
cs(n
s, l):
Wherein,
L is the SC-FDMA symbol number in each slot, N
symb uLfor the SC-FDMA symbolic number comprising in each slot.
2e) calculate α (ns, l)
According to n
cs(n
s, l) can further obtain circulation offset alpha (n
s, l):
Step 30, the processing mapping of ACK/NACK information
M-UE processes the ACK/NACK information generating according to above-mentioned resource distribution, and is finally mapped in distributed PUCCH resource, and step is as follows:
3a) coded modulation
M-UE encodes the ACK/NACK information of generation, and ACK is encoded to 1, NACK and is encoded to 0.The amount of information of ACK/NACK information b (i) after coding is 1 or 2bit, respectively through BPSK or QPSK be modulated to one oneself adjust symbol d (0), modulator approach is as shown in table 3:
Table 3 d (0) for PUCCH formats 1a and 1b.
3b) frequency domain expansion
M-UE is according to system configuration parameter, and after modulating, information d (0) carries out frequency domain expansion processing:
Wherein, cyclic shift length
R
u, v (α)(n) according to circulation offset parameter α (n
s, l) obtain:
R
u, v(n) be basic sequence,
3c) time domain expansion
Sequences y (0) after frequency domain expansion ..., y (N
seq pUCCH-1) through time domain, expansion obtains z (i) wherein again,
m′=0,1
3d) mapping
M-UE by z (i) sequence after time domain expansion according to first frequency domain after the order of time domain be filled into successively distributed RB to upper, finally complete the mapping of ACK/NACK information to physical resource.
On Backhaul Link, HARQ feedback information and Direct Link are different, the data of the descending RN of sending to of eNB comprise the data that are transferred to RN itself, and need the data of RN relaying to R-UE, simultaneously because Backhaul downlink data transmission can adopt different send modes, as transmitted multiple packets in a subframe, aggregated data bag transmission etc., make the HARQ feedback information of Backhaul Link different with the feedback information content of Direct Link possibility, may in a BackhaulLink sub-frame of uplink, report many tops ACK/NACK feedback information.On the other hand, because RN needs certain interval change-over time between the transmitting-receiving conversion of signal relay forwarding, RN is on the Backhaul Link sub-frame of uplink of configuration, the SC-FDMA symbolic number that can be actually used in uplink is less than the symbolic number that a subframe comprises, in the time of Normal CP, available symbols number is less than 14, when Extended CP, available symbols number is less than 12, and therefore the channel architecture of the Physical Uplink Control Channel of Backhaul Link (R-PUCCH) and PUCCH are also different.The above-mentioned information content is different from Physical Uplink Control Channel structure, and the processing of the ACK/NACK uplink feedback information of Backhaul Link cannot be carried out according to Direct Link method.
Summary of the invention
The present invention proposes a kind of processing method and device of the HARQ uplink feedback information for Backhaul Link, effectively realizing RN is carried on ACK/NACK uplink feedback information on R-PUCCH, to be transferred to eNB, and make full use of Backhaul link channel condition, improve the efficiency of transmission of Backhaul Link uplink feedback information.
In order to address the above problem, the invention provides a kind of processing method of the HARQ uplink feedback information for back haul link, comprise: HARQ uplink feedback information generates step, the data that receive are generated to a feedback information, coding obtains feedback information sequence, or, the multinomial data that receive are generated to multinomial feedback information, coding obtains multinomial feedback information sequence, and described multinomial feedback information sequence is carried out to the multiplexing feedback information sequence obtaining after multiplexing; Modulation step, to described feedback information sequence or multiplexing after feedback information sequence modulate, the feedback information sequence after being modulated; Frequency domain expansion step, carries out frequency domain expansion processing to the feedback information sequence after described modulation, obtains the complex-valued sequences after frequency domain expansion; Time domain spread step, carries out time domain extension process to the complex-valued sequences after described frequency domain expansion, obtains the complex-valued sequences after time-frequency expansion; Mapping step, is mapped to the complex-valued sequences after described time-frequency expansion on the Physical Uplink Control Channel physical resource of system configuration; Or, the complex-valued sequences after multiple time-frequency expansions is carried out to channel multiplexing, obtain multiplexed sequence, described multiplexed sequence is mapped on the Physical Uplink Control Channel physical resource of system configuration.
Further, said method also has following characteristics:
Described to multinomial feedback information sequence carry out information multiplexing one of refer to as follows carry out multiplexing: connect multiplexing, bind multiplexing and compress multiplexing, wherein: multiplexing the referring to of connecting, multinomial feedback information sequence multiplexing need is connected successively, form the feedback information sequence after multiplexing, the amount of information of the feedback information sequence after multiplexing equals the summation of the amount of information of this multinomial feedback information sequence; Bind multiplexing referring to, the identical information position of each feedback information sequence in multinomial feedback information sequence multiplexing need is carried out and operation, obtain the value of this information bit in the feedback information sequence after multiplexing, the amount of information of the feedback information sequence after wherein, multiplexing is identical with the feedback information sequence of amount of information maximum in this multinomial feedback information sequence; Compress multiplexing referring to, to each the feedback information sequence in the multiplexing multinomial feedback information sequence of need, all information bits of this feedback information sequence are carried out and operation, obtain a compressed value of this feedback information sequence, corresponding this multinomial feedback information sequence multiple compressed values series connection are obtained to the feedback information sequence after multiplexing, and the amount of information of the feedback information sequence after multiplexing equals the item number of multiplexing feedback information sequence.
Further, said method also has following characteristics:
Described complex-valued sequences after the expansion of multiple time-frequencies is carried out to channel multiplexing, obtains multiplexed sequence and specifically refer to:
Complex-valued sequences after k multiplexing time-frequency expansion is z
k(i
k),
k=0,1,…,n-1;
And
System is each z
k(i
k) configure corresponding multiplexing coefficient A
k(j
k)=0,1,
:
Obtain multiplexed sequence
Wherein, n is the number of carrying out the complex-valued sequences after the time-frequency expansion of channel multiplexing, n
sfor the timeslot number in radio frames,
according to the corresponding value of different channels structure choice of R-PUCCH.
Further, said method also has following characteristics:
Described HARQ uplink feedback information generates multinomial feedback information sequence described in step and refers to: relay station is several packets in same subframe transmission to base station, and/or relay station to base station several packets in the transmission of different subframes, and/or relay station is to the some sub data packets that comprise in the aggregated data bag of base-station transmission, the multinomial feedback information of generation.
Further, said method also has following characteristics:
In described mapping step, carry out complex-valued sequences after the multiple time-frequencies expansion of channel multiplexing from following multinomial feedback information: relay station is several packets in same subframe transmission to base station, and/or base station is at several packets of different subframe transmission, and/or the some sub data packets that comprise in the aggregated data bag of base-station transmission, the multinomial feedback information of generation.
Further, said method also has following characteristics:
In described frequency domain expansion step, feedback information sequence after using frequency domain expansion sequence to modulation is carried out frequency domain expansion processing, wherein, one or more definite described frequency domain expansion sequence according in following parameters: the cell ID of community, relay station place, system configuration is to the resource index n of the respective physical ascending control channel of relay station
r-PUCCH (1), high-rise configuration parameter N
cs (1), Δ
shift pUCCH.
Further, said method also has following characteristics:
In described time domain spread step, carry out as follows time domain expansion:
Wherein,
Y (n) represents the complex-valued sequences after frequency domain expansion; N
seq pUCCHcyclic shift length;
according to the corresponding value of different channels structure choice of R-PUCCH;
Orthogonal sequence
according to N
sF r-PUCCHand system configuration parameter n
r-PUCCH (1), N
cs (1), Δ
shift pUCCHobtain.
In order to solve the problems of the technologies described above, the present invention also provides a kind of processing unit of the uplink feedback information for back haul link, comprise: HARQ uplink feedback information generation module, for the data that receive are generated to a feedback information, coding obtains feedback information sequence, or, for the multinomial data that receive are generated to multinomial feedback information, coding obtains multinomial feedback information sequence, and described multinomial feedback information sequence is carried out to the multiplexing feedback information sequence obtaining after multiplexing; Modulation module, for to described feedback information sequence or multiplexing after feedback information sequence modulate, the feedback information sequence after being modulated; Frequency domain expansion module, carries out frequency domain expansion processing for the feedback information sequence to after described modulation, obtains the complex-valued sequences after frequency domain expansion; Time domain expansion module, carries out time domain extension process for the complex-valued sequences to after described frequency domain expansion, obtains the complex-valued sequences after time-frequency expansion; Mapping block, for being mapped to the complex-valued sequences after described time-frequency expansion the Physical Uplink Control Channel physical resource of system configuration; Or, for the complex-valued sequences after multiple time-frequency expansions is carried out to channel multiplexing, obtain multiplexed sequence, described multiplexed sequence is mapped on the Physical Uplink Control Channel physical resource of system configuration.
Further, said apparatus also has following characteristics:
HARQ uplink feedback information generation module, for one of as follows multinomial feedback information sequence being carried out to information multiplexing: connect multiplexing, bind multiplexing and compress multiplexing, wherein: multiplexing the referring to of connecting, multinomial feedback information sequence multiplexing need is connected successively, form the feedback information sequence after multiplexing, the amount of information of the feedback information sequence after multiplexing equals the summation of the amount of information of this multinomial feedback information sequence; Bind multiplexing referring to, the identical information position of each feedback information sequence in multinomial feedback information sequence multiplexing need is carried out and operation, obtain the value of this information bit in the feedback information sequence after multiplexing, the amount of information of the feedback information sequence after wherein, multiplexing is identical with the feedback information sequence of amount of information maximum in this multinomial feedback information sequence; Compress multiplexing referring to, to each the feedback information sequence in the multiplexing multinomial feedback information sequence of need, all information bits of this feedback information sequence are carried out and operation, obtain a compressed value of this feedback information sequence, corresponding this multinomial feedback information sequence multiple compressed values series connection are obtained to the feedback information sequence after multiplexing, and the amount of information of the feedback information sequence after multiplexing equals the item number of multiplexing feedback information sequence.
Further, said apparatus also has following characteristics:
Described mapping block, for as follows the complex-valued sequences after multiple time-frequency expansions being carried out to channel multiplexing, obtains multiplexed sequence:
Complex-valued sequences after k multiplexing time-frequency expansion is z
k(i
k),
k=0,1,…,n-1;
And
The system of obtaining is each z
k(i
k) configure corresponding multiplexing coefficient A
k(j
k)=0,1,
:
Obtain multiplexed sequence
Wherein, n is the number of carrying out the complex-valued sequences after the time-frequency expansion of channel multiplexing, n
sfor the timeslot number in radio frames,
according to the corresponding value of different channels structure choice of R-PUCCH.
Further, said apparatus also has following characteristics:
Described HARQ uplink feedback information generation module is used for generating following multinomial feedback information and carrying out information multiplexing: several packets to base station in same subframe transmission, and/or relay station to base station several packets in the transmission of different subframes, and/or relay station is to the some sub data packets that comprise in the aggregated data bag of base-station transmission, generates described multinomial feedback information.
Further, said apparatus also has following characteristics:
Described mapping block carries out channel multiplexing for using from the complex-valued sequences after multiple time-frequency expansions of following multinomial feedback information: several packets to base station in same subframe transmission, and/or base station is at several packets of different subframe transmission, and/or the some sub data packets that comprise in the aggregated data bag of base-station transmission, the multinomial feedback information of generation.
Further, said apparatus also has following characteristics:
Described frequency domain expansion module, carry out frequency domain expansion processing for the feedback information sequence after using frequency domain expansion sequence to modulation, wherein, one or more definite described frequency domain expansion sequence according in following parameters: the cell ID of community, relay station place, system configuration is to the resource index n of the respective physical ascending control channel of relay station
r-PUCCH (1), high-rise configuration parameter N
cs (1), Δ
shift pUCCH.
Further, said apparatus also has following characteristics:
Described time domain expansion module, for carrying out as follows time domain expansion:
Wherein,
Y (n) represents the complex-valued sequences after frequency domain expansion; N
seq pUCCHcyclic shift length;
according to the corresponding value of different channels structure choice of R-PUCCH;
Orthogonal sequence
according to N
sF r-PUCCHand system configuration parameter n
r-PUCCH (1), N
cs (1), Δ
shift pUCCHobtain.
The present invention proposes a kind of processing method and device of the ACK/NACK uplink feedback information for Backhaul Link, effectively realizing RN is carried on HARQ uplink feedback information on R-PUCCH, to be transferred to eNB, in addition, because Backhaul Link generally has the channel condition that is obviously better than Direct Link, and the up emissivities of RN are also better than UE, the present invention can make full use of Backhaul link channel condition, improves the efficiency of transmission of Backhaul Link uplink feedback information.
Embodiment
The R-PUCCH physical resource of eNB configuration indication RN, according to call number m obtain RB to resource with the PUCCH physical resource RB of M-UE to the same two ends in system bandwidth, R-PUCCH and PUCCH can configure multiplexing identical RB on, also can distribute independently RB to resource for R-PUCCH.
R-PUCCH channel architecture for loading ACK/nack message has multiple, in the time that system adopts normal CP, there are three kinds of structures, as shown in Figures 5 to 7, be called R-PUCCH format 1 channel architecture one, structure two, structure three under normal CP below, the physical resource distributing is the upper RB of each slot, and the RB configuring is to comprising altogether 14 SC-FDMA symbols, frequency hopping between slot, carries RS signal on #2, #3 in subframe, #4, #9, #10, #11 symbol.For structure one, #0 wherein, #13 symbol can not carrying signals due to transmitting-receiving interval change-over time of RN, #1, #5, loading ACK/nack message on #6, #7, #8, #12 symbol.For structure two, #13 symbol can not carrying signal due to transmitting-receiving interval change-over time of RN, #0, #1, #5, loading ACK/nack message on #6, #7, #8, #12 symbol.For structure three, #0 symbol can not carrying signal due to transmitting-receiving interval change-over time of RN, #1, #5, loading ACK/nack message on #6, #7, #8, #12, #13 symbol.
In the time that system adopts extended CP, there are three kinds of structures, as shown in Fig. 8 to Figure 10, be called R-PUCCH format 1 channel architecture one, structure two, structure three under extended CP below, the physical resource distributing is the upper RB of each slot, the RB configuring is to comprising altogether 12 SC-FDMA symbols, and frequency hopping between slot is carried RS signal on #2, #3 in subframe, #8, #9 symbol.For structure one, #0 wherein, #11 symbol can not carrying signals due to transmitting-receiving interval change-over time of RN, #1, #4, #5, loading ACK/nack message on #6, #7, #10 symbol.For structure two, #11 symbol wherein can not carrying signal due to transmitting-receiving interval change-over time of RN, #0, #1, #4, #5, loading ACK/nack message on #6, #7, #10 symbol.For structure three, #0 symbol wherein can not carrying signal due to transmitting-receiving interval change-over time of RN, #1, #4, #5, loading ACK/nack message on #6, #7, #10, #11 symbol.
As shown in figure 11, RN processes mapping according to the configuration indication of eNB to HARQ feedback information to the processing method of the HARQ uplink feedback information for back haul link provided by the invention, and step is as follows:
Step 1101, RN generates feedback information to the eNB downlink data receiving, and is encoded to the ACK/NACK feedback information b (i) of p bit, i=0,1 ..., p-1;
Step 1102, according to system configuration indication, RN is undertaken multiplexing by multinomial ACK/NACK information.
This step is optional step, if system configuration RN does not carry out information multiplexing, the feedback information in step 1101 is directly carried out to step 1103 and processes.
Wherein, described multinomial ACK/NACK information is:
RN is the multinomial feedback information in the corresponding generation of multiple packets of same subframe transmission to eNB;
RN is the multinomial feedback information in the corresponding generation of multiple packets of different subframe transmission to eNB;
The multinomial feedback information of RN to the corresponding generation of many sub data packets comprising in the aggregated data bag of eNB transmission;
Or, the mixing situation of above situation;
; relay station is several packets in same subframe transmission to base station; and/or relay station to base station several packets in the transmission of different subframes, and/or relay station is to the some sub data packets that comprise in the aggregated data bag of base-station transmission, the multinomial feedback information of generation.
Wherein: concrete multiplexing method has serial multiplex, Bundling (binding) is multiplexing and compression is multiplexing, wherein:
Multiplexing the referring to of connecting: multinomial feedback information sequence multiplexing need is connected successively, form the feedback information sequence after multiplexing;
Specifically, need the amount of information of multiplexing n item ACK/NACK information to be respectively p
0, p
1..., p
n-1bit, connects this n item ACK/NACK information successively, forms multiplexing ACK/NACK information sequence b (i), i.e. b
0(0), b
0(1) ..., b
0(p
0-1), b
1(0), b
1(1) ..., b
1(p
1-1) ..., b
n-1(p
n-1-1).The amount of information of multiplexing ACK/NACK information equals the summation of every ACK/NACK information, i.e. b (i), and i=0,1 ..., p-1bit, wherein, p=p
1+ p
2+ ...+p
n.
Bundling is multiplexing to be referred to: the identical information position of each feedback information sequence in multinomial feedback information sequence multiplexing need is carried out and operation, obtain the value of this information bit in the feedback information sequence after multiplexing, the amount of information of the feedback information sequence after wherein, multiplexing is identical with the feedback information sequence of amount of information maximum in this multinomial feedback information sequence;
Specifically, need the amount of information of multiplexing n item ACK/NACK information to be respectively p
0, p
1..., p
n-1bit, carries out AND-operation, i.e. the b of every ACK/NACK information by this n item ACK/NACK information successively step-by-step
k(i) information bit is carried out "AND", wherein, k=0,1 ..., n-1, i=0,1 ..., MAX (p
k-1), i.e. b (i)=b
0(i) & b
1(i) & b
2(i) & ... & b
n-1(i), form multiplexing ACK/NACK information sequence b (i).The amount of information of multiplexing ACK/NACK information equals the amount of information of the ACK/NACK information of amount of information maximum in every ACK/NACK information, i.e. b (i), and i=0,1 ..., p-1bit, wherein, p=Max (p
0, p
1..., p
n-1).
Compress multiplexing referring to:
To each the feedback information sequence in the multiplexing multinomial feedback information sequence of need, all information bits of this feedback information sequence are carried out and operation, obtain a compressed value of this feedback information sequence, corresponding this multinomial feedback information sequence multiple compressed values series connection are obtained to the feedback information sequence after multiplexing;
Specifically, need the amount of information of multiplexing n item ACK/NACK information to be respectively p
0, p
1..., p
n-1bit, carries out respectively p item by item by this n item ACK/NACK information
kthe AND-operation of bit, wherein, k=0,1 ..., n-1, i.e. b (k)=b
k(0) & b
k(1) & b
k(2) ... b
k(p
k-1), be 1bit by every ACK/NACK Information Compression, then the n item ACK/NACK after compression is connected, form multiplexing ACK/NACK information sequence b (i), b (i)=b (k).The amount of information of multiplexing ACK/NACK information equals multiplexing ACK/NACK information item number, i.e. b (i), and i=0,1 ..., p-1bit, wherein, p=n.
Step 1103, modulation step, RN modulates ACK/NACK information b (i);
The ACK/NACK information here can be the ACK/NACK information of non-multiplexed, can be also the ACK/NACK information after multiplexing process.
When RN modulates ACK/NACK information, adopt different modulation systems according to b (i) amount of information, as BPSK, QPSK, 8PSK, 16QAM, 64QAM or the modulation system of high-order more, b (i) is modulated to an own symbol of adjusting, ACK/NACK information after modulation becomes complex value symbol, represents with d (0).
Step 1104, frequency domain expansion step, RN, according to system configuration parameter, carries out frequency domain expansion processing by the complex value ACK/NACK information d (0) after modulation:
y(n)=d(0)·r(n),
Wherein, r (n) is frequency domain expansion sequence, according in following parameters one or more determine: the Cell ID of community, RN place, system configuration is to the resource index n of the corresponding R-PUCCH of RN
r-PUCCH (1), high-rise configuration parameter N
cs (1), Δ
shift pUCCH.
Step 1105, time domain spread step, RN carries out time domain extension process to the complex-valued sequences y (n) through frequency domain expansion, obtains the complex-valued sequences after time-frequency expansion, is shown below:
Wherein,
According to the corresponding value of different channels structure choice of R-PUCCH;
m′=0,1;
according to n
oc(n
s) and N
sF r-PUCCHobtain, and n
oc(n
s) according to system configuration parameter n
r-PUCCH (1), N
cs (1), Δ
shift pUCCHobtain.
Step 1106, RN is according to system configuration, by n the complex-valued sequences z after above-mentioned frequency domain, time domain extension process
k(i
k), k=0,1 ..., n-1 carries out channel multiplexing, obtains multiplexed sequence Z (i).
Wherein,
N sequence z
k(i
k),
And
To carrying out the sequence z of channel multiplexing
k(i
k), the corresponding multiplexing coefficient A of system configuration RN
k(j
k)=0,1,
Wherein, n
sfor the timeslot number in radio frames,
according to the corresponding value of different channels structure choice of R-PUCCH.
This step is optional step, if system configuration is not carried out channel multiplexing, and Z (i)=z (i).
N z of channel multiplexing carried out in configuration
k(i
k) sequence is from n item ACK/NACK information, described n item ACK/NACK information is:
RN is the multinomial feedback information in the corresponding generation of multiple packets of same subframe transmission to eNB;
RN is the multinomial feedback information in the corresponding generation of multiple packets of different subframe transmission to eNB;
The multinomial feedback information of RN to the corresponding generation of many sub data packets comprising in the aggregated data bag of eNB transmission;
Or, the mixing situation of above situation;
That is, relay station is several packets in the transmission of same subframe to base station, and/or base station is at several packets of different subframes transmission, and/or the some sub data packets that comprise in the aggregated data bag of base-station transmission, the multinomial feedback information of generation.
Step 1107, RN by Z (i) according to first frequency domain after the order of time domain be mapped to successively on the R-PUCCH physical resource of system configuration, the R-PUCCH physical resource configuring is according to the resource index n of corresponding R-PUCCH
r-PUCCH (1), high-rise configuration parameter N
cs (1), Δ
shift pUCCH, N
rB (2)obtain.
RN obtains the related resource for loading ACK/NACK feedback information according to the R-PUCCH channel architecture using and system configuration parameter, comprise physical resource, frequency domain, time domain expansion index etc., further describe implementation process of the present invention below by specific embodiment.
Embodiment mono-
RN adopts R-PUCCH format 1 channel architecture one loading ACK/NACK feedback information under normal CP, and eNB is designated as the relevant parameter configuration of RN:
N
r-PUCCH (1)with n
pUCCH (1)correspondence, RN can obtain the relevant parameter to R-PUCCH resource according to calculating same method with PUCCH resource configuration parameter, as follows:
m=3
According to above-mentioned parameter, according to content of the present invention, RN processes the ACK/NACK information generating, and process is as follows:
Step 1201, the data that RN sends eNB generate and are encoded to the ACK/NACK feedback information b (i) of 2bit, i=0,1;
Step 1202, according to system configuration, RN need carry out information multiplexing to ACK/NACK information at this R-PUCCH, and the ACK/NACK feedback information b (i) of above-mentioned generation is designated as b
1(i) the 1bit ACK/NACK feedback information b of the upper packet that, RN sends eNB
0and b (0)
1(i) connect multiplexingly, forming multiplexing ACK/NACK information is b (i), i=0,1,2;
Step 1203, RN modulates ACK/NACK information b (i), because b (i) sequence length is 3, selects the modulation system of 8PSK that b (i) is modulated to a complex value symbol d (0);
Step 1204, RN, according to system configuration parameter, carries out frequency domain expansion by the complex value ACK/NACK information d (0) after modulation:
y(n)=d(0)·r(n),
Here r (n)=e,
j α nr
u, v(n),
Wherein, r
u, v(n) be basic sequence, circulation offset alpha is above-mentioned parameter α (n
s, l).
Step 1205, RN carries out time domain extension process to the complex-valued sequences y (n) through frequency domain expansion:
Wherein,
According to n
oc(n
s) and N
sF r-PUCCH, obtain corresponding
for:
Step 1206, RN, according to system configuration, does not carry out channel multiplexing to this R-PUCCH, i.e. Z (i)=z (i);
Step 1207, RN by Z (i) sequence according to first frequency domain after the Sequential Mapping of time domain to the RB of above-mentioned configuration to upper, first slot's
The n of second slot
pRB=1.
According to said process, RN by information multiplexing, is mapped to two ACK/NACK uplink feedback informations in distributed R-PUCCH resource, as shown in figure 12, realize effective carrying of the HARQ feedback information to Backhaul Link, improved the resource utilization of R-PUCCH simultaneously.
Embodiment bis-
RN adopts R-PUCCH format 1 channel architecture two loading ACK/NACK feedback information under normal CP, and eNB is designated as the relevant parameter configuration of RN:
Can obtain successively other parameter as follows:
m=4
According to above-mentioned parameter, RN processes the ACK/NACK information generating, and process is as follows:
Step 1301, the data that RN sends eNB generate and are encoded to the ACK/NACK feedback information b (i) of 4bit, i=0,1,2,3;
Step 1302, according to system configuration, RN does not carry out information multiplexing to ACK/NACK information at this R-PUCCH, directly by above-mentioned b (i), i=0,1,2,3 carry out next step modulation treatment;
Step 1303, RN modulates ACK/NACK information b (i), because b (i) sequence length is 4, selects the modulation system of 16QAM that b (i) is modulated to a complex value symbol d (0);
Step 1304, RN, according to system configuration parameter, carries out frequency domain expansion by the complex value ACK/NACK information d (0) after modulation:
Wherein,
Calculate and obtain according to above-mentioned parameter.
Step 1305, RN carries out time domain extension process to the complex-valued sequences y (n) through frequency domain expansion:
Wherein,
According to n
oc(n
s) and N
sF r-PUCCH, obtain corresponding
for:
Step 1306, RN, according to system configuration, carries out channel multiplexing to this R-PUCCH, and sequence z obtained above (i) is designated as to z
2(i) the sequence z that the ACK/NACK feedback information processing of two other packet that, RN sends eNB obtains
0and z (i)
1(i) carry out channel multiplexing, the channel multiplexing parameter of configuration is respectively: A
0(j
0)=[1,1,0,0,0,0,0], A
1(j
1)=[0,0,1,1,0,0,0], A
2(j
2)=[0,0,0,0,1,1,1],
Step 1307, RN by Z (i) sequence according to first frequency domain after the Sequential Mapping of time domain to the RB of above-mentioned configuration to upper, i.e. the n of first slot
pRB=2, second slot's
According to said process, RN by channel multiplexing, is mapped to three ACK/NACK uplink feedback informations in distributed R-PUCCH resource, as shown in figure 13, realize effective carrying of the HARQ feedback information to Backhaul Link, improved the resource utilization of R-PUCCH simultaneously.
Embodiment tri-
RN adopts R-PUCCH format 1 channel architecture one loading ACK/NACK feedback information under extended CP, and eNB is designated as the relevant parameter configuration of RN:
Can obtain successively other parameter as follows:
m=6
According to above-mentioned parameter, RN processes the ACK/NACK information generating, and process is as follows:
Step 1401, the data that RN sends eNB generate the ACK/NACK feedback information b (i) of 4bit, i=0,1,2,3;
Step 1402, according to system configuration, RN need carry out information multiplexing to ACK/NACK information at this R-PUCCH, and adopts Bundling multiplex mode.The ACK/NACK feedback information b (i) of above-mentioned generation is designated as b
1(i) the ACK/NACK feedback information b of the upper packet that, RN sends eNB
0(i), i=0,1,2,3 and b
1(i) carry out Bundling multiplexing, form multiplexing ACK/NACK information b (i), b (i)=b
0(i) & b
1(i), i=0,1,2,3, then by b (i), i=0,1,2,3 carry out next step modulation treatment
Step 1403, RN modulates ACK/NACK information b (i), because b (i) sequence length is 4, selects the modulation system of 16QAM that b (i) is modulated to a complex value symbol d (0);
Step 1404, RN, according to system configuration parameter, carries out frequency domain expansion processing by the complex value ACK/NACK information d (0) after modulation:
Wherein,
Calculate and obtain according to above-mentioned parameter.
Step 1405, RN carries out time domain extension process to the complex-valued sequences y (n) through frequency domain expansion:
Wherein,
According to n
oc(n
s) and N
sF r-PUCCH, obtain corresponding
for:
Step 1406, RN, according to system configuration, carries out channel multiplexing to this R-PUCCH, and sequence z obtained above (i) is designated as to z
1(i) the sequence z that the ACK/NACK feedback information processing of the another one packet that, RN sends eNB obtains
0(i) carry out channel multiplexing, the channel multiplexing parameter of configuration is respectively: A
0(j
0)=[1,1,1,0,0,0], A
1(j
1)=[0,0,0,1,1,1],
Step 1407, RN by Z (i) sequence according to first frequency domain after the Sequential Mapping of time domain to the RB of above-mentioned configuration to upper, i.e. the n of first slot
pRB=3, second slot's
According to said process, two ACK/NACK uplink feedback informations are carried out information multiplexing by RN, carry out channel multiplexing with another ACK/NACK feedback information again, finally be mapped in distributed R-PUCCH resource, as shown in figure 14, realize effective carrying of the HARQ feedback information to Backhaul Link, improved the resource utilization of R-PUCCH simultaneously.
Embodiment tetra-
RN adopts R-PUCCH format 1 channel architecture two loading ACK/NACK feedback information under extended CP, and eNB is designated as the relevant parameter configuration of RN:
, according to the computational methods in summary of the invention, can obtain successively other parameter as follows:
According to above-mentioned parameter, RN processes the ACK/NACK information generating, and process is as follows:
Step 1501, eNB sends aggregation group bag data to RN, and aggregated data bag contains 4 sub data packets, and RN generates respectively the ACK/NACK feedback information of 2bit to each sub data packets, be b
k(i), k=0,1,2,3, i=0,1;
Step 1502, according to system configuration, RN need carry out information multiplexing to ACK/NACK information at this R-PUCCH, and adopts Multiplexing multiplex mode.RN carries out the AND-operation of 2bit, b (k)=b item by item to above-mentioned 4 ACK/NACK feedback informations
k(0) & b
k(1), k=0,1,2,3, form multiplexing ACK/NACK information sequence b (i)=b (k), i=0,1,2,3, then b (i) is carried out to next step modulation treatment;
Step 1503, RN modulates ACK/NACK information b (i), because b (i) sequence length is 4, selects the modulation system of 16QAM that b (i) is modulated to a complex value symbol d (0);
Step 1504, RN, according to system configuration parameter, carries out frequency domain expansion by the complex value ACK/NACK information d (0) after modulation:
Wherein,
Calculate and obtain according to above-mentioned parameter.
Step 1505, RN carries out time domain extension process to the complex-valued sequences y (n) through frequency domain expansion:
Wherein,
According to n
oc(n
s) and N
sF r-PUCCH, obtain corresponding
for:
Step 1506, RN, according to system configuration, does not carry out channel multiplexing to this R-PUCCH, i.e. Z (i)=z (i).
Step 1507, RN by Z (i) sequence according to first frequency domain after the Sequential Mapping of time domain to the RB of above-mentioned configuration to upper, i.e. the n of first slot
pRB=3, second slot's
According to said process, RN will carry out information multiplexing to 4 of each sub data packets ACK/NACK uplink feedback informations, finally be mapped in distributed R-PUCCH resource, as shown in figure 15, realize effective carrying of the HARQ uplink feedback information to Backhaul Link, improved the resource utilization of R-PUCCH simultaneously.
The present invention also provides a kind of processing unit of the uplink feedback information for back haul link, as shown in figure 16, comprising:
HARQ uplink feedback information generation module, for the data that receive are generated to a feedback information, coding obtains feedback information sequence, or, for the multinomial data that receive are generated to multinomial feedback information, coding obtains multinomial feedback information sequence, and described multinomial feedback information sequence is carried out to the multiplexing feedback information sequence obtaining after multiplexing;
Modulation module, for to described feedback information sequence or multiplexing after feedback information sequence modulate, the feedback information sequence after being modulated;
Frequency domain expansion module, carries out frequency domain expansion processing for the feedback information sequence to after described modulation, obtains the complex-valued sequences after frequency domain expansion;
Time domain expansion module, carries out time domain extension process for the complex-valued sequences to after described frequency domain expansion, obtains the complex-valued sequences after time-frequency expansion;
Mapping block, for being mapped to the complex-valued sequences after described time-frequency expansion the Physical Uplink Control Channel physical resource of system configuration; Or, for the complex-valued sequences after multiple time-frequency expansions is carried out to channel multiplexing, obtain multiplexed sequence, described multiplexed sequence is mapped on the Physical Uplink Control Channel physical resource of system configuration.
Wherein, described HARQ uplink feedback information generation module, for one of as follows multinomial feedback information sequence being carried out to information multiplexing: connect multiplexing, bind multiplexing and compress multiplexing, wherein:
Multiplexing the referring to of connecting, connects multinomial feedback information sequence multiplexing need successively, forms the feedback information sequence after multiplexing, and wherein, the amount of information of the feedback information sequence after multiplexing equals the summation of the amount of information of this multinomial feedback information sequence;
Bind multiplexing referring to, the identical information position of each feedback information sequence in multinomial feedback information sequence multiplexing need is carried out and operation, obtain the value of this information bit in the feedback information sequence after multiplexing, the amount of information of the feedback information sequence after wherein, multiplexing is identical with the feedback information sequence of amount of information maximum in this multinomial feedback information sequence;
Compress multiplexing referring to, to each the feedback information sequence in the multiplexing multinomial feedback information sequence of need, all information bits of this feedback information sequence are carried out and operation, obtain a compressed value of this feedback information sequence, corresponding this multinomial feedback information sequence multiple compressed values series connection are obtained to the feedback information sequence after multiplexing, and the amount of information of the feedback information sequence after multiplexing equals the item number of multiplexing feedback information sequence.
Wherein, described mapping block, for as follows the complex-valued sequences after multiple time-frequency expansions being carried out to channel multiplexing, obtains multiplexed sequence:
Complex-valued sequences after k multiplexing time-frequency expansion is z
k(i
k),
k=0,1,…,n-1;
And
The system of obtaining is each z
k(i
k) configure corresponding multiplexing coefficient A
k(j
k)=0,1,
:
Obtain multiplexed sequence
Wherein, n is the number of carrying out the complex-valued sequences after the time-frequency expansion of channel multiplexing, n
sfor the timeslot number in radio frames,
according to the corresponding value of different channels structure choice of R-PUCCH.
Wherein, described HARQ uplink feedback information generation module is used for generating following multinomial feedback information and carries out information multiplexing:
Multinomial feedback information to base station in the corresponding generation of multiple packets of same subframe transmission; Or,
Multinomial feedback information to base station in the corresponding generation of multiple packets of different subframe transmission; Or,
To the multinomial feedback information of the corresponding generation of many sub data packets comprising in the aggregated data bag of base-station transmission;
Or, the mixing situation of above situation;
That is, several packets to base station in the transmission of same subframe, and/or base station is at several packets of different subframes transmission, and/or the some sub data packets that comprise in the aggregated data bag of base-station transmission, generate described multinomial feedback information.
Wherein, described mapping block carries out channel multiplexing for using from the complex-valued sequences after multiple time-frequency expansions of following multinomial feedback information:
Multinomial feedback information to base station in the corresponding generation of multiple packets of same subframe transmission; Or,
Multinomial feedback information to base station in the corresponding generation of multiple packets of different subframe transmission; Or,
To the multinomial feedback information of the corresponding generation of many sub data packets comprising in the aggregated data bag of base-station transmission;
Or, the mixing situation of above situation;
That is, several packets to base station in the transmission of same subframe, and/or base station is at several packets of different subframes transmission, and/or the some sub data packets that comprise in the aggregated data bag of base-station transmission, the multinomial feedback information of generation.
Wherein, described frequency domain expansion module, carry out frequency domain expansion processing for the feedback information sequence after using frequency domain expansion sequence to modulation, wherein, one or more definite described frequency domain expansion sequence according in following parameters: the cell ID of community, relay station place, system configuration is to the resource index n of the respective physical ascending control channel of relay station
r-PUCCH (1), high-rise configuration parameter N
cs (1), Δ
shift pUCCH.
Wherein, described time domain expansion module, for carrying out as follows time domain expansion:
Wherein,
Y (n) represents the complex-valued sequences after frequency domain expansion; N
seq pUCCHcyclic shift length;
according to the corresponding value of different channels structure choice of R-PUCCH;
Orthogonal sequence
according to N
sF r-PUCCHand system configuration parameter n
r-PUCCH (1), N
cs (1), Δ
shift pUCCHobtain.