CN102077669A - Method and apparatus for allocating the multi-carrier ack channel - Google Patents

Method and apparatus for allocating the multi-carrier ack channel Download PDF

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Publication number
CN102077669A
CN102077669A CN2009801249201A CN200980124920A CN102077669A CN 102077669 A CN102077669 A CN 102077669A CN 2009801249201 A CN2009801249201 A CN 2009801249201A CN 200980124920 A CN200980124920 A CN 200980124920A CN 102077669 A CN102077669 A CN 102077669A
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ack channel
sequence number
sub
uplink ack
distribution
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CN102077669B (en
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陈小波
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and apparatus for allocating the multi-carrier ACK channel are provided in the present invention. The said method comprises: assigning sequence numbers by a base station to at least one DL CC and/or downlink subframe; dividing the uplink ACK channel corresponding to the downlink subframe of the DL CC into subblocks, and assigning subblock labels, and allocating the uplink ACK channel to at least one DL CC first in the ascending order of the said sequence numbers and then in the ascending order of the said labels. The present invention can better support dynamic scheduling PUSCH transmission on the idle resource block, and meanwhile can effectively reduce the signaling from the base station.

Description

Method and apparatus for allocating the multi-carrier ack channel
A kind of method and apparatus technical field of multicarrier ack channel distribution
The present embodiments relate to the communication technology, more particularly to a kind of method and apparatus of multicarrier ack channel distribution.Background of invention
In strengthening system LTE- A (the Long Term Evolution-Advanced, senior long term evolution by LTE (Long Term Evolution, Long Term Evolution) further evolution of system）In, carrier aggregation (Carrier Aggregation) technology is selected to be used, and to support broader bandwidth, meets peak data rate requirement of the International Telecommunication Union for the forth generation communication technology.One LTE system, using only one or a pair of member carriers（Component Carrier), in the LTE-A of carrier aggregation, multiple member carriers can be used simultaneously, to obtain wider transmission bandwidth.Each member carrier in LTE-A systems may be configured to that LTE system is compatible, the frequency spectrum of each member carrier can be adjacent continuous frequency spectrum, can also be non-conterminous frequency spectrum even different frequency bands in identical frequency band in discontinuous spectrum.In lte-a system, LTE UE (LTE User Equipment, LTE user equipmenies) one of them or a pair of member carriers progress data transmit-receives are only had access, and LTE-AUE can access multiple member carriers simultaneously according to its ability and business demand and carry out data transmit-receives.Carrier aggregation technology is also spectrum aggregating (Spectrum Aggregation) technology, or bandwidth expansion (Bandwidth Extension) technology sometimes.
In LTE-A systems, each member carrier has independent HARQ (Hybrid Automatic Repeat Request, physical layer hybrid automatic repeat-request) process, and can configure different UL CC (UpLink Component Carrier, uplink member carrier for LTE-A UE）With DL CC (Downlink Component Carrier, downlink member carrier）Number.May be at least one PDCCH (Physical Downlink Control that at least one DL CC is issued in a UL CC when LTE-A UE access at least one DL CC and at least one UL CC transceiving data simultaneously CHannel, physical layer descending control channel）Uplink ACK channel is distributed respectively（Up responder link）.In the prior art, LTE-A base stations are that the method for at least one DL CC assigning ACK is to set different uplink ACK channels to map startup offset respectively for each DL CC, it result in the discontinuous of uplink ACK channel distribution, so each DL CC are discontinuous by the corresponding resource block of idle uplink ACK channel, these discontinuous resource blocks are used blunt hardly possible.And prior art needs base station to be signaling under each startup offset, adds the quantity of the lower signaling of base station.The content of the invention
The embodiments of the invention provide method, equipment and the system of a kind of multicarrier ack channel distribution.The embodiments of the invention provide a kind of method of multicarrier ack channel distribution, including：For at least one DL CC and/or descending sub frame Allotment Serial Number；
Sub-block is divided for the DL CC corresponding uplink ACK channel of descending sub frame, and distributes sub-block label；Order according to first incremental above-mentioned sequence number, then incremental above-mentioned sub-block label is distributed uplink ACK channel at least one DL CC.
The embodiments of the invention provide a kind of base station, including：
First sequence number distribute module, for at least one DL CC and/or descending sub frame Allotment Serial Number；First label distribute module, for dividing sub-block for the corresponding uplink ACK channel of each descending sub frame, and distributes sub-block label；
First channel assignment module, for distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned sub-block label.
The embodiments of the invention provide a kind of UE, including：
Second channel distribute module, for according to first incrementally sequence number, the then incrementally order of sub-block label is distributed uplink ACK channel at least one DL CC.
The embodiments of the invention provide a kind of system of multicarrier ack channel distribution, including： Above-mentioned base station is used to divide sub-block for the corresponding uplink ACK channel of each descending sub frame, and distributes sub-block label；For to distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned sub-block label；For to distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned label.
Method, equipment and the system of a kind of multicarrier ack channel distribution provided in an embodiment of the present invention are in the corresponding uplink ACK channel of the different DL CC actual association subframes of distribution, and being first incremented by sequence number, incrementally sub-block label will be corresponding with not paired DL CC by less actual association number of sub frames and smaller n againCFIIdle uplink ACK block of channels caused by value is organized into continuously distributed, it is thus possible to preferably support the dynamic dispatching physical layer Uplink Shared Channel on resource block corresponding with these idle uplink ACK block of channels.Brief Description Of Drawings
Fig. 1 is prior art LTE-A TDD (LTE-A Time Division Duplex, LTE-A time division duplexs）Ack channel allocation result schematic diagram in system；
Fig. 2 distributes the embodiment schematic diagram of uplink ACK channel for the present invention；
Fig. 3 is the uplink ACK channel distribution schematic diagram that PDCCH is distributed；
Fig. 4 is the uplink ACK channel distribution schematic diagram that PDCCH is distributed；
Fig. 5 is ack channel allocation result schematic diagram of the embodiment of the present invention；
Fig. 6 is that the present invention is the embodiment schematic diagram that at least one DL CC reserves uplink ACK channel；Fig. 7 is the structural representation of base station of the embodiment of the present invention；
Fig. 8 is UE of embodiment of the present invention structural representation.Implement the mode of the present invention
The embodiments of the invention provide the ack channel distribution method under a kind of carrier aggregation and equipment, the technical scheme to the embodiment of the present invention is described in further detail below.
Inventor has found LTE-A base station in the prior art during the embodiment of the present invention is realized It is to set different ack channels to map startup offset respectively for each DL CC at least one DL CC methods for distributing uplink ACK channel, and needs base station to be signaling under each startup offset.Not paired DL CC are corresponding by less actual association number of sub frames and smaller in this distribution method, and " the idle uplink ACK block of channels caused by ^ values is discontinuously arranged, so it is difficult to by these idle resource dynamic dispatchings to data transfer；And due to issue startup offset respectively to each DL CC, add the quantity of the lower signaling of base station.
The uplink ACK channel for for example setting i-th of DL CC setting maps startup offset as NCCHJ, then CCE (Control Channel Element, the control channel unit) labels for being shown as i-th of DL CC map reserved uplink ACK channel number to uplink ACK channel label.N in similar LTE system is used in each member carrierCCEArriveCCHThe mode of mapping.
In LTE TDD "CC£To " mapping mode be：It is that each sub-frame of uplink defines descending association subframe collection index according to ratio of uplink subframe to downlink subframe and HARQ timing relationships：..., ^^ is as shown in table 1 below, to solve the problem of the PDCCH that a sub-frame of uplink is issued as at least one descending sub frame distributes uplink ACK channel respectively.In descending association subframe collection index： ,… , In, it is that the PDCCH that M descending sub frame is issued distributes uplink ACK channel respectively that the number M of element, which is represented in the sub-frame of uplink, in set；The order of element, i.e. tmSubscript w (0≤w≤M -1), represent M descending sub frame distribution uplink ACK channel when subframe mapping order；The value k of elementmIt is to count that corresponding subframe after respective number subframe forward since the sub-frame of uplink, which to represent corresponding descending sub frame or special subframe, so as to give in the sub-frame of uplink feeding back ACK/NACK (ACKnowledgement/Negative-ACKnowledgement confirm response/denies response) descending sub frame set.By taking ratio of uplink subframe to downlink subframe 3 and subframe 2 as an example, in the ACK/NACK of sub-frame of uplink internal feedback M=3 subframe, the numerical value " 7,6,11 " of element specifies the subframe of the 5th, 6 and 1 that this 3 subframes are previous radio frames respectively respectively in set. Subframe label w in the sub- radio frames of up-downgoing
Frame proportioning 0123456789
0 6 4 6 4
1 7, 6 4 7, 6 4
2 8, 7, 4, 6 8, 7, 4, 6
3 7, 6, 11 6, 5 5, 4
6, 5,
4 12, 8, 7, 11
4, 7
5 13, 12, 9, 8, 7, 5, 4, 11, 6
6 7 7 5 7 7
For some PDCCH dispatched in descending sub frame corresponding with element in descending association subframe collection index or special subframe, it is assumed that the starting CCE that it takes is marked as nCCEIf the uplink ACK channel of correspondence distribution is marked as the then first selection one from set ^ { 0,1,2,3 }；7 values cause
Np < nCCE < Np+1, then by obtained ρ values substitute into
np( uccH = (M - m - \) x Np + m x Np+l + nCCE + N CCH
Middle to calculate the uplink ACK channel label distributed, wherein ^^^ represents the uplink ACK channel mapped according to CCE labels in all PUCCH (Physical Uplink Control CHannel, physical layer ascending control channel）Startup offset in form 1/la/lb channels,
Np = max {0, It is that the downlink system bandwidth that is represented with resource block number, N are that the continuous subcarrier number that is taken on frequency domain of a resource block, L " represent downward rounding operation.
As can be seen from Table 1, when LTE TDD systems use ratio of uplink subframe to downlink subframe 1 and 3, element number is different in descending association subframe collection index in different sub-frame of uplink, is now setting uplink ACK channel to map startup offset ACOTWhen, the greatest member number in subframe collection index is associated according to the proportioning up-downgoing to set.For example in ratio of uplink subframe to downlink subframe 3, the greatest member number in descending association subframe collection index is 3, i.e., to reserve uplink ACK channel resource according to the CCE numbers of 3 descending sub frames.When element number in the descending association subframe collection index of a sub-frame of uplink When less, in such as subframe 3 and subframe 4 in ratio of uplink subframe to downlink subframe 3, reserved uplink ACK channel resource can exceed actual demand, and the corresponding resource block of these idle uplink ACK channels can dynamically be scheduled for PUSCH transmission in LTE TDD systems.
But in the mode in LTE system to mapping to be used to LTE-A TDD systems nCCEnPUCCH
Afterwards, these idle uplink ACK channels are just discontinuous, it is difficult to dynamically be scheduled for PUSCH transmission simultaneously.In LTE-A TDD systems when setting different uplink ACK channels to map startup offsets respectively for each DL CC at least one DL CC of identical UL CC mapping uplink ACK channels, greatest member number that also will be in descending association subframe collection index corresponding with each DL CC is set.Fig. 1 gives an example, wherein all member carriers all use ratio of uplink subframe to downlink subframe 3, and is that the PDCCH issued in 3 DL CC distributes corresponding uplink ACK channel in identical UL CC；3 subframes are up in descending association subframe collection index during ratio of uplink subframe to downlink subframe 3 as can be seen from Table 1, so being set when setting uplink ACK channel mapping startup offset according to 3 subframes；In UL CC subframe 3 and 4, for 2 subframes distribution in each DL CC descending association subframe collection index uplink ACK channel respectively as shown in grey in Fig. 1 and black fritter, reserved uplink ACK channel idle also corresponding with 1 subframe, as shown in white fritter in Fig. 1, wherein each fritter correspond to the continuous uplink ACK channel of at least one label.In addition when system load is light, in this 3 DL CC descending sub frame, OFDM (Orthogonal Frequency Division Multiplexing, OFDM) number of symbols n shared by PDCCH channelsCFIIt is smaller, for example "Cf =2, then the starting CCE labels of PDCCH channel occupancies "CC£Always it is less than P="OT^ values when=2.After distribution uplink ACK channel, the 3rd fritter for distributing to each subframe is also idle uplink ACK channel.Now all idle uplink ACK channels are as shown in Fig. 1, as we can see from the figure, idle uplink ACK channel in the uplink ACK channel reserved for each DL CC is discontinuously arranged, the corresponding resource block of these discontinuous idle uplink ACK channels can not be utilized in data transfer, so foring waste.
The embodiment of the present invention will be organized into by allocation rule as the idle uplink ACK block of channels caused by less actual association number of sub frames and smaller value it is continuously distributed, can will be up by these free time The corresponding resource block of ack channel is put together, and preferably supports the dynamic dispatching PUSCH transmission on these resource blocks.It can effectively reduce the signaling that base station is issued simultaneously.Descending sub frame Allotment Serial Number, distribution sub-block labels of the Fig. 2 at least one DL CC of the present invention, the embodiment schematic diagram for uplink ACK channel of reallocating.The present embodiment includes：
Step 201, it is at least one DL CC and/or descending sub frame Allotment Serial Number；
Step 202, the corresponding uplink ACK channel of the descending sub frame for being DL CC divides sub-block, and distributes sub-block label；
Step 203, according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned sub-block label is distributed uplink ACK channel at least one DL CC.
The present embodiment is suitable for LTE-A TDD and LTE-A FDD systems, during base station is DL CC distribution uplink ACK channels.DL CC points are first paired and azygous before distribution uplink ACK channel by base station, then are their distributing carrier waves mapping sequence number, and for TDD system, distribution subframe mapping sequence number is also needed after distributing carrier wave mapping sequence number.According to above-mentioned sequence number and sub-block label, by calculation formula, the 4 of uplink ACK channel to be distributed are obtainedCff.Each step is kept company below thin explanation.
In lte-a system, LTE UE, which can only access a UL CC and DL CC, LTE-A a UE simultaneously, can access A UL CC and A simultaneouslyDiIndividual DL CC, wherein AmAnd ADiAll be positive integer and both can not wait.
To LTE-A UE, when the DL CC numbers of configuration>1 and PDCCH is dispersed in when being transmitted on the DL CC of configuration, the UL CC corresponding relation according to where DL CC where LTE-A UE PDCCH and uplink ACK channel, it is possible to be the PDCCH distribution uplink ACK channels that the LTE-A UE are handed down in multiple DL CC in identical UL CC.A kind of corresponding relation is ^ UL CC of the uplink ACK channel dispersion in configuration for the PDCCH distribution that will be issued for multiple DL CC, such as Fig. 3 examples, DL CC 1, DL CC 2, DL CC 3, UL CC 1 and UL CC 2 wherein are configured with for some LTE-A UE, and the PDCCH issued in DL CC 1 distributes corresponding uplink ACK in UL CC 1 Channel, the PDCCH issued in DL CC 2 and DL CC 3 distributes corresponding uplink ACK channel in UL CC 2.Another corresponding relation is that the uplink ACK channel for the PDCCH distribution for issuing all DLCC of configuration concentrates on some UL CC of configuration, such as Fig. 4 examples, DLCC 1, DLCC 2, DLCC 3, the ^ULCC2 of ULCC 1 wherein are configured with for some LTE-A UE, all concentrating on UL CC 2 in DLCC 1, DL CC 2 and DL CC 3 PDCCH issued distributes corresponding uplink ACK channel.Wherein, it is the angle from a LTE-AUE in the description to example.From the point of view of system, ULCC corresponding relations where DL CC where each LTE-A UE PDCCH and uplink ACK channel can be with identical, can also be different.
From the point of view of system, to a UL CC, as long as there is the PDCCH that at least one LTE-AUE and/or LTE UE is issued in DL CC to distribute corresponding uplink ACK channel in the UL CC, then will be that PDCCH that DL CC i are issued is reserved and distribution uplink ACK channel in the UL CC.
For convenience of description, in embodiments of the present invention, if ULCC and DLCC can simultaneously be accessed by a LTEUE, referred to as one composition is to member carrier, and the paired member carrier that will be referred to as other side each other；Otherwise it is referred to as one group of not paired member carrier, and the not paired member carrier that other side will be referred to as each other.In figs. 3 and 4, ULCC1 and DLCC 1, ULCC 2 and DLCC 2 are exactly such two composition to member carrier；A UL CC and a DL CC in the case of remaining then constitute one group of not paired member carrier.
In step 201 when base station will be 4) (4) >=1 in some ULCC) individual DLCC ....During the PDCCH channel distribution uplink ACK channels issued, to LTE-A TDD systems, it can be set with similar LTE TDD systems according to member carrier ratio of uplink subframe to downlink subframe and HARQ timing relationships, descending association subframe collection index defined respectively for 4) individual DL CC in UL CC.When ratio of uplink subframe to downlink subframe setting is identical, recommend to index using with the descending association subframe collection of LTE TDD system identical, as shown in table 1.Above-mentioned is the number of element in the descending association subframe collection index defined for UL CC current sub-frame of uplink with each DL CC actual number of subframes associated.Above-mentioned Allotment Serial Number can be at least one descending direct Unified number distribution of association subframe at least one DLCC, it is contemplated that the order of element is had been presented in the subframe mapping sequence number in DLCC, recommendation in descending association subframe collection index The sequence number for stating distribution is made up of carrier wave mapping sequence number and subframe mapping sequence number.It is above-mentioned be identical UL CC mapping uplink ACK channels at least one DL CC it is each it is descending association subframe Allotment Serial Number be specially：The order of elements indexed for the not paired DL CC distributing carrier waves mapping sequence number in 4) individual DL CC according to descending association subframe collection is each association descending sub frame distribution subframe mapping sequence number w in each DL CC.
To LTE-A FDD systems, above-mentioned is 1 with each DL CC actual number of subframes associated.It is above-mentioned be identical UL CC mapping uplink ACK channels at least one DL CC it is each it is descending association subframe Allotment Serial Number be specially：Sequence number is mapped for the not paired DL CC distributing carrier waves in 4 DL CC
During distributing carrier wave mapping sequence number, only it is the not paired DL CC distributing carrier waves mapping sequence number in 4 DL CC, this is the uplink ACK channel allocation mechanism in order to allow paired DL CC to use LTE system, to maintain the backwards compatibility to LTE UE.At least one i.e. above-mentioned DL CC is at least one not paired DL CC.
In view of that for two DL CC distribution same carrier wave mapping sequence numbers the uplink ACK channel of distribution can be caused to be in same area, it is understood that there may be the uplink ACK channel confliction between DL CC, it is recommended as different DL CC and distributes different carrier wave mapping sequence numbers.When having and only DL CC.Be paired member carrier and 4 >=2When, be not paired DL CC 4) in individual DL CC distribute respectively different carrier waves mapping sequence numbers be considered as set ', U to gathering 0,4 _2--- mapping.
After for not paired DL CC distributing carrier waves mapping sequence number, the carrier wave mapping sequence number of distribution can be notified to give LTE-A UE by base station in the following way.Mode one, base station notifies that the carrier wave for not paired DL CC distribution maps sequence number in UL CC paired DL CC broadcast.Mode two, the carrier wave mapping sequence number of distribution is mapped according to the not paired DL CC labels of preset rules as per advice, and further, above-mentioned preset rules can be that carrier wave label maps sequence number to carrier wave --- mapping.Mode three, to LTE-A UE, base station at least notifies the not paired DL CC of LTE-A UE configurations carrier wave to map sequence number by signaling proprietary UE. In step 202., the first label of base station distribute module divides sub-block for the DL CC corresponding uplink ACK channel of descending sub frame, and distributes sub-block label.
Above-mentioned division sub-block refers to according to the different OFDM symbol number n of PDCCH channel occupanciesCFIWhen different CCE numbers carry out.
In step 202 and 203 discuss, assuming that step 201 be in 4) individual DL CC not paired DL CC distributing carrier waves mapping at least one above-mentioned DL CC of sequence number be at least one not paired DL CC, and not paired DL CC number is set as-impair,< A _ impair <A^, 0<q<A_ impair.
The DL CC of sequence number are mapped for being assigned with carrier wave, CCE numbers when value is P are NZE = Wherein expression is assigned with the DL cc of the carrier wave mapping sequence number bandwidth represented with resource block number, Nc=i, L " represent downward rounding operation.
DL CC to being assigned with carrier wave mapping sequence number ^, uplink ACK channel corresponding with a descending sub frame is after sub-block is divided, if preceding P sub-block is made up of N uplink ACK channel, then the P sub-block is by Nq, the continuous uplink ACK channel composition of d label.N represents to be assigned with the OFDM symbol number of the DL CC PDCCH channel occupancies of carrier wave mapping sequence number "OTThe uplink ACK channel number distributed during=P.
When distributing a uplink ACK channel for each CCE, have Wherein maX{ x, j } represents to take the greater computing in X and y.It is only possible to betide LTE-A UE in view of the PDCCH channel distributions correspondence uplink ACK channel issued for not paired DL CC, it is not necessary to consider the backwards compatibility to LTE UE.During to not paired DLCC distribution uplink ACK channel, some header compression mechanism can be introduced to reduce the expense of corresponding uplink ACK channel.A kind of header compression mechanism is the uplink ACK channel number that base station broadcast notifies to reserve for not paired DL CC, at this point for LTE-A FDD systems , to LTE-A TDD systems A^=min { N, max{ 0, N } }, wherein N^ represents to be to be assigned with the uplink ACK channel number that the corresponding descending sub frames of not paired DL CC of carrier wave mapping sequence number are reserved in LTE-A FDD systems, ^ represents that the descending association subframe collection of the not paired DL CC to be assigned with carrier wave mapping sequence number in LTE-A TDD systems indexes the reserved uplink ACK channel number of the corresponding descending sub frame of w-th of element Min { x, j } represents to take smaller's computing in x and y.Another header compression mechanism is that base station broadcast notifies that, wherein being positive integer, now, wherein Π is represented to be assigned with used resource compressibility factor when the not paired DL CC of carrier wave mapping sequence number reserve uplink ACK channel
Round up computing.
Above-mentioned distribution sub-block label is according to CCE labels "CC£To distribute sub-block label ^.Further, CCE labels nCCEIt is the label of the CCE shared by UE PDCCH channels.The starting CCE labels of PDCCH channel occupancies are can also be as the multiple CCE of PDCCH channel occupancies.
According to CCE labels nCCEIt is the detailed process of distributing sub-block label P：It is to the descending sub frame internal label for being assigned with carrier wave mapping sequence number "CC£CCE, one P value of selection is so that N from set { 0,1,2,3 }q,p≤fO< Nq,p+l, distribution sub-block label is wherein/("CC£) represent CCE labels "CC£Function.
As no introducing header compression mechanism, i.e. A^=maXWhen { 0, N }, have/("CC£) = "CC£；When introducing header compression mechanism, have to LTE-A FDD systems/("CC£) = "CCE
~SF
K or f (nCCE CCE
) = mod("CC+ mod W+1,2) x ACK have to LTE-A TDD systems
N.
CCE or CCE
f(nCCE ) f(jiCCE ) = mod("CC£ + mod(N^c m K + 1, 2) x ACK Nq Ac m K), wherein
K N
Step 203, it is incremented by the order of above-mentioned sub-block label again to distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number.
For the paired DL CC in 4) individual DL CC, to maintain the backwards compatibility to LTE UE, the uplink ACK channel allocation mechanism of LTE system is reused, be will not be described in detail herein.Discussed below is the process for being distributed for not paired DL CC uplink ACK channel.
To LTE-A TDD systems, when above-mentioned sequence number maps sequence number by carrier wave and subframe mapping sequence number w constitute, it is above-mentioned according to be first incremented by above-mentioned sequence number again incrementally the order of above-mentioned sub-block label come at least one DL CC distribute uplink ACK channel：Sequence number ^ is mapped according to first increasing carrier, is incremented by subframe mapping sequence number w again, is finally incremented by sub-block label P order to distribute uplink ACK channel at least one DL CC；Or according to be first incremented by subframe mapping sequence number ^, again increasing carrier map sequence number and be finally incremented by sub-block label P order and distribute uplink ACK channel at least one DL CC.
In the DL CC for being assigned with carrier wave mapping sequence number, in descending sub frame corresponding with m-th of element ^ of descending association subframe collection index marked as nCCECCE, map sequence number q, the order for being incremented by subframe mapping sequence number w again, being finally incremented by sub-block label p according to first increasing carrier, the detailed process for distributing uplink ACK channel is as follows：
If distribution uplink ACK channel marked asUCCH, the sub-block label P values substitution that step 202 is distributed
-l
∑ N. p + gl (i, p)) +∑g2 (I, p) + f(nCCE ) - Nq,p + N CCH,unpairMiddle to calculate the uplink ACK channel label distributed, wherein Μ represents to be assigned with the association descending sub frame number that the not paired DL CC of carrier wave mapping sequence number descending association subframe collection index is provided,
Ni p+「Ni pIf M; > m 0 is other
A¾CCff fl, represent startup offset of the uplink ACK channel mapped according at least one not paired DL CC CCE label in all PUCCH format 1/la/lb channels.Descending association subframe collection index in there is identical to associate descending sub frame number M, now gi (P)=m x (N! +1 - Ν ρ ) , g2 ( , p) = N! +1 - Ν ρ.In the DL CC for being assigned with carrier wave mapping sequence number, in descending sub frame corresponding with m-th of element ^ of descending association subframe collection index marked as nCCECCE, according to be first incremented by subframe mapping sequence number m, again increasing carrier map sequence number ^, be finally incremented by sub-block label P order, the detailed process for distributing uplink ACK channel is as follows： If distribution uplink ACK channel marked asUCCH, the sub-block label Ρ values substitution that step 202 is distributed
-l -l
n CCH = ∑ ,. x N,p +∑Mt x (N,p+1 - N,p ) + m x (Λ^+1 - Nq + f(nCCE ) - + N UCCH,UMiddle to calculate the uplink ACK channel label distributed, wherein Μ represents to be assigned with the association descending sub frame number that the DL CC of carrier wave mapping sequence number descending association subframe collection index is provided, Acai fl,>Represent startup offset of the uplink ACK channel mapped according at least one not paired DL CC CCE label in all PUCCH format 1/la/lb channels.
To LTE-A FDD systems, above-mentioned sequence number is made up of carrier wave mapping sequence number, above-mentioned to be incremented by the order of above-mentioned sub-block label again according to first incremental above-mentioned sequence number to be specially at least one DL CC distribution uplink ACK channels：Sequence number is mapped according to first increasing carrier, is incremented by sub-block label P order again to distribute uplink ACK channel at least one DL CC.Above-mentioned is 1 with each DL CC actual number of subframes associated
Be assigned with carrier wave mapping sequence number DL CC in, in corresponding descending sub frame marked as nCCE^C E, map sequence number ^ according to first increasing carrier, are incremented by sub-block label P order again, the detailed process for distributing uplink ACK channel is as follows：
If distribution uplink ACK channel marked asCCH, by the sub-block label that step 202 is distributed directly substitute into npucc= It is middle to calculate the uplink ACK channel label distributed, wherein, Represent startup offset of the uplink ACK channel mapped according at least one not paired DL CC CCE label in all PUCCH format 1/la/lb channels.
In LTE-A TDD systems, when to distribute uplink ACK channel at least one DL CC of identical uplink member carrier mapping uplink ACK channel, greatest member number that be in descending association subframe collection index corresponding with each DL CC is set.The embodiment of the present invention is proposed according to the actual number of subframes associated with each DL CC, is in identical uplink member carrier mapping uplink ACK channel At least one DL CC each descending association subframe Allotment Serial Number, the uplink ACK channel of distribution divides sub-block and distributes sub-block label in subframe, is incremented by the order of above-mentioned sub-block label again to distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number.Continue Fig. 1 example, H an ancient weapon made of bamboo DL CC 3 are paired DL CC, be not paired DL CC 1 and during difference distributing carrier wave mapping sequence number 0 and 1 of DL CC 2, be in pairs and not paired DL CC uplink ACK channel distribution notifies mapping startup offset U respectivelyCCH,x CH,u,ir, sequence number, the order for being incremented by subframe mapping sequence number again, being finally incremented by sub-block label are mapped according to first increasing carrier, is that the uplink ACK channel of each DL CC distribution is as shown in Figure 5.As seen from Figure 4, the idle uplink ACK block of channels as caused by less actual association number of sub frames and smaller value corresponding with not paired DL CC can be organized into continuously distributed by the embodiment of the present invention, it is thus possible to preferably support the dynamic dispatching physical layer Uplink Shared Channel on resource block corresponding with these idle uplink ACK block of channels.
Simultaneously, the embodiment of the present invention avoids base station from notifying a uplink ACK channel to map startup offset for each DL CC, notify a common uplink ACK channel to map startup offset for not paired DL CC, can effectively reduce the signaling that base station is issued.Meanwhile, this method can be used for FDD system, to keep LTE-A TDD and FDD system same design., can be by not paired DL CC due to smaller in LTE-A FDD systems "OTIdle uplink ACK block of channels caused by value is organized into continuously distributed, can preferably support the dynamic dispatching physical layer Uplink Shared Channel on resource block corresponding with these idle uplink ACK block of channels.Fig. 6 is that the present invention is the embodiment schematic diagram step 601 that at least one DL CC reserves uplink ACK channel, and uplink ACK channel is reserved at least one DL CC according to the maximum number of subframes associated with DL CC；
Step 602, it is at least one DL CC and/or descending sub frame Allotment Serial Number；
Step 603, the corresponding uplink ACK channel of the descending sub frame for being DL CC divides sub-block, and distributes sub-block label； Step 604, according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned sub-block label is distributed uplink ACK channel at least one DL CC.
The present embodiment is suitable for LTE-A TDD and LTE-A FDD systems, during base station is DL CC distribution uplink ACK channels.Base station is before distribution uplink ACK channel, first uplink ACK channel is reserved for some DL CC, it is again paired and azygous by DL CC points, again sequence number is mapped for their distributing carrier waves, for TDD system, distribution subframe mapping sequence number is also needed after distributing carrier wave mapping sequence number, according to above-mentioned sequence number and sub-block label, by calculation formula, the n of uplink ACK channel to be distributed is obtainedCCH.Each step is described in detail below.
In step 601, it to LTE-A TDD systems, can be set with similar LTE TDD systems according to member carrier ratio of uplink subframe to downlink subframe and HARQ timing relationships, be that at least one DL CC defines descending association subframe collection index respectively in uplink member carrier.When ratio of uplink subframe to downlink subframe setting is identical, recommends to use and the descending association subframe collection of LTE TDD system identicals is indexed.A kind of simple resource reservation mode is greatest member number in being indexed according to each DL CC descending association subframe collection, the maximum number of subframes that is associated with DL CC come for the reserved uplink ACK channels of at least one DL CC.To LTE-A FDD systems, above-mentioned is 1 with each DL CC maximum number of subframes associated.
The startup offset A for being the reserved uplink ACK channel resources of at least one DL CC by the uplink ACK channel that represents to be mapped according at least one DL CC CCE label in all PUCCH format 1/la/lb channelsCTo notify UE.When at least one above-mentioned DL CC refers at least one not paired DL CC, startup offset A of the uplink ACK channel mapped according at least one DL CC CCE label in all PUCCH format 1/la/lb channelsCOTRefer to Λ ^,Μ„ραί, this parameter can notify UE by base station broadcast.In addition, for each paired DL CC, base station, which will also be broadcasted, notifies a different uplink ACK channel mapping startup offset, and reserves uplink ACK channel resource by the uplink ACK channel mapping startup offset of notice.
It is that the PDCCH channel distribution uplink ACK channels that not paired DL CC are issued are only possible to betide LTE-A UE to a uplink member carrier, so the problem of distribution of this part resource can not consider LTE UE backwards compatibilities.It is not paired DL CC to reduce the resource overhead of uplink ACK channel Reserved uplink ACK channel resource can be without being reserved as LTE system according to maximum CCE numbers, but introduces some header compression mechanism.Kind of header compression mechanism is the uplink ACK channel number that base station broadcast notifies to reserve for not paired DL CC, for example or.Another header compression mechanism is that used resource compressibility factor when reserving uplink ACK channel for not paired DL CC is extensively known in base station all, for example, be wherein positive integer, can be with identical to respectively not paired DL CC, can also be different.When notifying resource compressibility factor, the uplink ACK channel number reserved to be assigned with the not paired DL CC of carrier wave mapping sequence number is calculated according to the resource compressibility factor of notice, such as to max -4)]/3]
LTE-A TDD systems ACK
, to LTE-A FDD systems ACK 0 Shang [(
SF, wherein ^ represent that PDCCH believes in subframe
The maximum OFDM symbol number that K roads take.In LTE system, whether according to downlink system bandwidth and be the subframe that carries TDD system synchronizing channel, ^ value can be 23 or 4
Step 602 refers to that base station is that the DL CC for having reserved ack channel distribute uplink ACK channel respectively according to above-mentioned sequence number and sub-block to base station in 604 marked as at least one DL CC distribution uplink ACK channels, specific distribution method and step 201 distribute a set of ack channel to 203 identical to having reserved the DL CC of ack channel according to step 302.
The embodiment of the present invention proposes to be at least one DL CC distributing carrier wave mapping sequence number in identical UL CC mapping uplink ACK channels, it is that at least one DL CC reserves uplink ACK channel according to the maximum number of subframes associated with DL CC, according to sequence number and sub-block label come at least one DL CC continuous dispensing uplink ACK channel.The corresponding idle uplink ACK block of channels of not paired DL CC can be organized into continuously distributed by the embodiment of the present invention, it is thus possible to preferably support the dynamic dispatching PUSCH transmission on resource block corresponding with these idle uplink ACK block of channels.
Fig. 7 is that the base station in the structural representation of base station of the embodiment of the present invention, the present embodiment includes: First sequence number distribute module 701, for at least one DL CC and/or descending sub frame Allotment Serial Number；
First label distribute module 702, divides sub-block, and distribute sub-block label for the corresponding uplink ACK channel of descending sub frame for DL CC；
First channel assignment module 703, for distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned sub-block label.
It can also include：
First sending module 704, carrier wave mapping sequence number or CC labels for sending the distribution of the first sequence number distribute module；
It can also include：
First reserved module 705, for reserving uplink ACK channel according to the maximum number of subframes associated with DL CC at least one DL CC, and is sent to the first sequence number distribute module by reserved result.
The embodiment of the present invention is in the embodiment shown in Fig. 2,6, its feature to be repeated no more.Fig. 8 is that the UE in UE of embodiment of the present invention structural representation, the present embodiment includes：Second channel distribute module 801, for according to first incrementally sequence number, the then incrementally order of sub-block label is distributed uplink ACK channel at least one DL CC.
It can also include：
First receiving module 802, for receiving carrier wave mapping sequence number or CC labels and being sent to second channel distribute module or CC labels are sent into the first mapping block carrier wave mapping sequence number；
What if the first receiving module was received is CC labels, in addition to：
First mapping block 803, the carrier wave for mapping distribution according to the CC labels of reception according to preset rules maps sequence number.
The embodiment of the present invention is in the embodiment shown in Fig. 2,6, its feature to be repeated no more.Through the above description of the embodiments, those skilled in the art can be understood that this Invention can be realized by hardware, the mode of necessary general hardware platform can also be added to realize by software.Understood based on such, technical scheme can be embodied in the form of software product, and the software product can be stored in a non-volatile memory medium（Can be CD-ROM, U disks, mobile hard disk etc.）In, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform the above-mentioned method of each embodiment of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module or flow in accompanying drawing are not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, respective change can also be carried out and be disposed other than in one or at least one device of the present embodiment.The module of above-described embodiment can be merged into a module, can also be further split at least one submodule.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Disclosed above is only several specific embodiments of the present invention, and still, the present invention is not limited to this, and the changes that any person skilled in the art can think of should all fall into protection scope of the present invention.

Claims (1)

  1. Claims
    1. a kind of method of multicarrier ack channel distribution, it is characterised in that including：For at least one DL CC and/or descending sub frame Allotment Serial Number；
    Sub-block is divided for the DL CC corresponding uplink ACK channel of descending sub frame, and distributes sub-block label；Order according to the first incremental sequence number, then the incremental sub-block label is distributed uplink ACK channel at least one DL CC.
    2. the method for a kind of multicarrier ack channel distribution as claimed in claim 1, it is characterised in that described is that at least one DL CC and/or descending sub frame Allotment Serial Number include：
    For TDD system：
    Sequence number is mapped at least one DL CC distributing carrier wave；
    It is for FDD system in identical UL CC mapping uplinks according to the actual number of subframes associated with each DL CC：
    Sequence number is mapped at least one DL CC distributing carrier wave.
    3. the method for a kind of multicarrier ack channel distribution as claimed in claim 2, it is characterised in that the actual number of subframes includes being set according to member carrier ratio of uplink subframe to downlink subframe and HARQ timing relationships are predefined.
    4. the method for a kind of multicarrier ack channel distribution as claimed in claim 2, it is characterised in that at least one described DL CC includes the azygous DL CC of UL CC ated least one with mapping uplink ACK channel.
    5. the method for a kind of multicarrier ack channel distribution as claimed in claim 2, it is characterised in that the distribution subframe mapping sequence number specifically includes the order of elements distribution subframe mapping sequence number according to descending association subframe collection index.
    6. the method for a kind of multicarrier ack channel distribution as described in claim 2 or 5, it is characterised in that the distribution carrier wave mapping sequence number and the distribution subframe mapping sequence number, is specifically included：Different carrier waves, which are distributed, for different DL CC maps sequence number； Different subframes, which are distributed, for different subframes maps sequence number.
    7. the method for a kind of multicarrier ack channel distribution as claimed in claim 1, it is characterised in that the corresponding uplink ACK channel of the descending sub frame for DL CC, which divides sub-block, to be included, and sub-block is divided according to the corresponding uplink ACK channel of row subframe；The distribution sub-block label includes distributing sub-block label according to CCE labels.
    8. a kind of method of multicarrier ack channel distribution as claimed in claim 7, it is characterized in that, the CCE labels are the labels of the CCE shared by UE PDCCH channels, are the starting CCE of PDCCH channel occupancies label as PDCCH at least two CCE of channel occupancy.
    9. the method for a kind of multicarrier ack channel distribution as claimed in claim 7, it is characterised in that the sub-block label that distributed according to CCE labels includes：
    From set Pe0, i,2, 3 } in one P value of selection so thatNq'p≤ /("c <, wherein CCE is that the descending sub frame internal label for being assigned with carrier wave mapping sequence number ^ isnccECCE, distribute sub-block label P, wherein "）Represent CCE labelsnccEFunction, represent to be assigned with the uplink ACK channel number that is included of preceding P sub-block of mono- descending sub frame of DL CC of carrier wave mapping sequence number.
    10. the method for a kind of multicarrier ack channel distribution as claimed in claim 2, it is characterised in that described to distribute uplink ACK channel at least one DL CC according to the first incremental sequence number, then the order of the incremental sub-block label, including：
    For TDD system：
    Sequence number is mapped according to first increasing carrier, is incremented by subframe mapping sequence number again, is finally incremented by the order of sub-block label to distribute uplink ACK channel at least one DL CC；Or
    According to first be incremented by subframe mapping sequence number, again increasing carrier mapping sequence number, finally be incremented by sub-block label order come at least one DL CC distribute uplink ACK channel；
    For FDD system： Sequence number is mapped according to first increasing carrier, is incremented by the order of sub-block label again to distribute uplink ACK channel at least one DL CC.
    11. a kind of method of multicarrier ack channel distribution as claimed in claim 10, it is characterized in that, it is described that sequence number is mapped according to first increasing carrier, is incremented by subframe mapping sequence number again, is finally incremented by the order of sub-block label at least one DL CC distribution uplink ACK channels to include for TDD system：
    The sub-block label P values of distribution are substituted into
    ∑ (M{ N. p + gl ( , p)) +∑g2 (i, p) + f(nCCE、- Nq,p + N UCCH,unpairIt is middle to calculate the uplink ACK channel label 4 distributed
    Its towel：
    M, represents to be assigned with the association descending sub frame number that the not paired DL CC of carrier wave mapping sequence number descending association subframe collection index is provided,
    A¾CQ/ a, startup offset of the uplink ACK channel mapped according at least one not paired DL CC CCE label in all PUCCH format 1/la/lb channels is represented,
    12. the method for a kind of multicarrier ack channel distribution as claimed in claim 11, it is characterised in that when the not paired DL CC have identical ratio of uplink subframe to downlink subframe, gi (' ', P)=m x (N! +1 - Ν ρ ) , g2 ( , ρ) = - Ν ρ。
    13. a kind of method of multicarrier ack channel distribution as claimed in claim 10, it is characterized in that, for TDD system, described according to being first incremented by, subframe maps sequence number, increasing carrier maps sequence number, finally incrementally the order of sub-block label includes to distribute uplink ACK channel at least one DL CC again： The sub-block label P values of distribution are substituted into CCH=∑ ^ Χ N,p +∑ ,. x (N,p+1 - N,p ) + m x (Λ^+1 - NQ + f(nCCE ) - + CCH,unIt is middle to calculate the uplink ACK channel label " ^c^ distributed；
    Its towel：
    MThe association descending sub frame number that the DL CC of ' represent be assigned with carrier wave mapping sequence number ' ' descending association subframe collection index is provided, Η represents startup offset of the uplink ACK channel mapped according at least one not paired DL CC CCE label in all PUCCH format 1/la/lb channels.
    14. a kind of method of multicarrier ack channel distribution as claimed in claim 10, it is characterized in that, it is described that sequence number is mapped according to first increasing carrier, is incremented by the order of sub-block label again at least one DL CC distribution uplink ACK channels to include for FDD system：
    The sub-block label P values of distribution are substituted into
    = ΥΝ + Σ Ν Ρ + fincCE ) +
    Its towel：
    A¾Co aiRepresent startup offset of the uplink ACK channel mapped according at least one not paired DL CC CCE label in all PUCCH format 1/la/lb channels.
    15. a kind of method of multicarrier ack channel distribution as claimed in claim 1, it is characterised in that it is described at least one DL CC and/or descending sub frame Allotment Serial Number before also include：Uplink ACK channel is reserved at least one DL CC according to the maximum number of subframes associated with DL CC.
    16. also include before a kind of method of multicarrier ack channel distribution as claimed in claim 1, the distribution uplink ACK channel：
    To notify a uplink ACK channel mapping startup offset respectively with not paired DL CC in pairs.
    17. a kind of base station, it is characterised in that including： First sequence number distribute module, for at least one DL CC and/or descending sub frame Allotment Serial Number；First label distribute module, divides sub-block, and distribute sub-block label for the corresponding uplink ACK channel of descending sub frame for DL CC；
    First channel assignment module, for distribute uplink ACK channel at least one DL CC according to the first incremental sequence number, then the order of the incremental label.
    18. a kind of base station as claimed in claim 17, it is characterised in that including：First sending module, for sending carrier wave mapping sequence number or CC labels.
    19. a kind of base station as claimed in claim 17, it is characterised in that including：First reserved module, for reserving uplink ACK channel according to the maximum number of subframes associated with DL CC at least one DL CC.
    20. a kind of UE, it is characterised in that including：
    Second channel distribute module, for according to first incrementally sequence number, the then incrementally order of label is distributed uplink ACK channel at least one DL CC.
    21. a kind of UE as claimed in claim 20, it is characterised in that also include：First receiving module, for receiving carrier wave mapping sequence number or CC labels.
    22. a kind of UE as claimed in claim 20, it is characterised in that if what is received is CC labels, in addition to：
    First mapping block, the carrier wave for mapping distribution according to the CC labels of reception according to preset rules maps sequence number.
    23. a kind of system of multicarrier ack channel distribution, it is characterised in that including base station：The base station is used to be at least one DL CC and/or descending sub frame Allotment Serial Number；Sub-block is divided for the DL CC corresponding uplink ACK channel of descending sub frame, and distributes sub-block label；For to distribute uplink ACK channel at least one DL CC according to first incremental above-mentioned sequence number, then the order of incremental above-mentioned sub-block label；For to distribute uplink ACK channel at least one DL CC according to the first incremental sequence number, then the order of the incremental label.
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