CN102413505A - Downlink ACK (acknowledgement)/NACK (negative acknowledgement) feedback resource allocation method and corresponding base station and user equipment - Google Patents
Downlink ACK (acknowledgement)/NACK (negative acknowledgement) feedback resource allocation method and corresponding base station and user equipment Download PDFInfo
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Abstract
The invention discloses a resource allocation method by adopting ACK (acknowledgement)/NACK (negative acknowledgement) feedback bound by component carriers. In the method, for a binding component carrier collection of a downlink subframe having data scheduling, if one data scheduling is transmitted on a principal component carrier or at least one data scheduling is subjected to over-carrier scheduling from the principal component carrier and is transmitted on a subsidiary component carrier, single downlink ACK/NACK feedback resource can be allocated by an implicit resource allocation mode; if not, the single downlink ACK/NACK feedback resource can be allocated by a mixed resource allocation mode.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly adopted the LTE-Advanced of carrier aggregation technology and resource allocation methods and the relevant base station and the subscriber equipment of the descending ACK/NACK feedback in the 4G system.
Background technology
Third generation partner program (3rd Generation Partnership Project; 3GPP) Long Term Evolution (Long Term Evolution; LTE) time division duplex of system (Time Division Duplex; TDD) in the pattern,, possibly there be the situation of sub-frame of uplink (subframe) number less than the descending sub frame number according to the setting of up-downgoing proportioning.In this case,, need in a sub-frame of uplink, reply, promptly carry out descending ACK/NACK feedback downlink transmission data in a plurality of descending sub frames or data retransmission in order to reduce the propagation delay time of data.Traditionally, replying of each downlink transmission data or data retransmission generally is the ACK/NACK information of 1 bit.Yet,, introduced ACK/NACK multiplexing (ACK/NACK Multiplexing) scheme among the LTE in order to realize the feedback of a plurality of ACK/NACK information bits on limited resources.
ACK/NACK among the LTE is multiplexing to be called channel again and to select (channel selection), is the method that mode that a kind of ACK/NACK information of the transmission data with a plurality of descending sub frames makes up with two bits and a plurality of feedback resources in a sub-frame of uplink is fed back.Wherein, if transmit the data of a plurality of code words on each descending sub frame simultaneously, then adopt spatial domain binding (Spatial bundling) method, that is: each code word is corresponding ACK/NACK bit is operated the feedback information that becomes a bit through logical AND.The channel selection scheme is through the selection and QPSK (the Quadrature Phase Shift Keying of actual feedback resource; QPSK) combination of modulator approach; Make that (User Equipment feeds back in the time of UE) can supporting the ACK/NACK information of same of a plurality of bits subscriber equipment.The base station (evolved Node B, eNB) receive feedback information after, tabling look-up with the used real resource of feedback according to the corresponding value of information of its modulation symbol obtains the ACK/NACK information of transmission data in the corresponding descending sub frame.The feedback resources relevant with channel selective mode among the LTE is to distribute to the user's through the mode of implicit expression (implicit); Particularly: the transmission data in each descending sub frame are dispatched by the downlink resource assignment information; The downlink resource assignment information is at Physical Downlink Control Channel (Physical Downlink Control CHannel; PDCCH) transmission in; Each PDCCH is mapped to several control channel unit (Control Channel Element respectively; CCE) on, and the sequence number of first CCE that the corresponding ACK/NACK feedback resources of the transmission data in each descending sub frame (being the resource of the PUCCH Format 1b that defines among the LTE) is mapped to through corresponding PDCCH is derived according to following formula (1) and is drawn (referring to non-references 1):
n
PUCCH＝n
CCE+N
PUCCH (1)
Wherein, n
CCEThe sequence number of first CCE that is mapped to for said PDCCH, N
PUCCHIt is Radio Resource control (Radio Resource Control, RRC) higher level parameters of configuration.
Descending ACK/NACK number of bits of feedback generally is n the corresponding n of a resource ACK/NACK information bit with relation between the feedback resources number.Notice that the descending ACK/NACK number of bits of feedback here is through the result after the binding of spatial domain, rather than the corresponding real ACK/NACK information bit of original downlink data transmission.
Introduced carrier aggregation (carrier aggregation) technology in the LTE-Advanced system, that is: (Component Carrier, CC) polymerization is to support the up-downgoing transmission bandwidth greater than 20MHz for two or more component carriers.The LTE-Advanced standardization is stipulated at present; The up CC of a subscriber equipment proprietary (UE specific) be configured to carry semi-staticly this subscriber equipment based on Physical Uplink Control Channel (Physical Uplink Control CHannel, PUCCH) transmission ACK/NACK information.Therefore, in the LTE-Advanced system, (Frequency Division Duplex, FDD) pattern and tdd mode all will be supported the ACK/NACK multiplex mode to FDD.
The LTE-Advanced system standardization stipulates that at present channel selective mode need be supported FDD and TDD simultaneously.And under fdd mode, the required descending ACK/NACK feedback resources of channel selective mode distributes (referring to non-references 2) as follows:
It is blank that the corresponding descending ACK/NACK feedback resource distribution method of channel selection under the tdd mode remains in present standardization effort, needs further research.In addition, a prerequisite of the descending ACK/NACK feedback resource distribution method under the above-mentioned fdd mode is to require to use the spatial domain binding.If spatial domain binding finally is proved and can causes performance loss thereby can not be used; The resource that descending ACK/NACK resource allocation methods is distributed under the then above-mentioned fdd mode will be not enough to through the channel selective mode transmission above-mentioned not through the ACK/NACK information of spatial domain binding, therefore also need study new resource allocation methods.
The list of references tabulation
Non-references 1:TS 36.213V8.7.0, " Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ";
Non-references 2:3GPP R1-105040, Way Forward on PUCCH Resource Allocation, Samsung, CATT, ETRI; Panasonic, Ericsson, ST-Ericsson, LG-Ericsson, LGE; InterDigital, MediaTek, Huawei, NTT DOCOMO, Potevio; Alcatel-Lucent, Alcatel-Lucent Shanghai Bell, RIM, Sharp.
Summary of the invention
Technical problem to be solved by this invention is: the resource allocation methods and corresponding base station and the subscriber equipment that propose the descending ACK/NACK feedback information of a kind of LTE-Advanced of being used for and later release system.
For addressing the above problem; According to a first aspect of the invention; Proposed a kind of resource allocation methods, having comprised: for the binding CC set of the descending sub frame that has data dispatch, if there is a data scheduling on the principal component carrier wave, to transmit to the ACK/NACK feedback that has adopted the CC binding; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, distribute single descending ACK/NACK feedback resources through the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave; Otherwise, distribute single descending ACK/NACK feedback resources through mixing resource distribution mode.
According to a second aspect of the invention; A kind of resource allocation methods to the ACK/NACK feedback that has adopted the descending sub frame binding has been proposed; Comprise: for the downlink component carrier that has data dispatch; If there is the scheduling of data on the principal component carrier wave, to transmit, perhaps have at least a data scheduling to stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, distribute two descending ACK/NACK feedback resources through the implicit expression resource distribution mode; Otherwise, distribute two descending ACK/NACK feedback resources through mixing resource distribution mode.
Resource allocation methods according to second aspect present invention; If do not receive the pairing data allocations of first PDSCH of being dispatched on the said carrier component; Subscriber equipment produces DTX as special ACK/NACK feedback, and need not allocation of downlink ACK/NACK feedback resources.
Preferably; Resource allocation methods according to second aspect present invention; The sequence number of first control channel unit CCE that said implicit expression resource distribution mode is mapped to based on the pairing data allocations of first PDSCH of being dispatched on the said carrier component derives two descending ACK/NACK feedback resources.
Preferably, according to the resource allocation methods of second aspect present invention, said mixing resource distribution mode is: the base station disposes some resources through RRC signaling explicitly in advance and gives subscriber equipment; And by two in subscriber equipment indication RRC resources configured of the ARI territory in the corresponding data allocations of said data dispatch.
According to a third aspect of the invention we, proposed a kind of resource allocation methods of ACK/NACK feedback, having comprised:, judged that it is single codeword transmission or many codeword transmission for the PDSCH of needs distribution ACK/NACK feedback resources; If the single codeword transmission, according to the resource allocation methods under the fdd mode in the LTE-Advanced system, adopt implicit expression or mixing resource distribution mode to distribute single descending ACK/NACK feedback resources; If many codeword transmission, adopt improved implicit expression or mixing resource distribution mode to distribute a plurality of descending ACK/NACK feedback resources.
Like this, this patent has proposed to be used for the resource allocation methods of the descending ACK/NACK feedback information of LTE-Advanced and later release system, has filled up the present blank of standardization.
The present invention propose some be applicable to that the resource allocation methods of tdd mode equally also goes for fdd mode be a special case of 1: 1 o'clock because fdd mode can be regarded as up-downgoing proportioning in the tdd mode.
Description of drawings
Through below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 shows in a kind of typical LTE-Advanced system sketch map of resources for user equipment allocation result under the fdd mode;
Fig. 2 shows and mixes in the resource allocation methods, and the base station disposes to the resource of the subscriber equipment sketch map for all identical resource distribution result of all CC through RRC in advance;
Fig. 3 shows and mixes in the resource allocation methods, and the base station disposes the resource distribution result's who has nothing in common with each other for each CC to the resource of subscriber equipment sketch map in advance through RRC;
Fig. 4 shows in a kind of typical LTE-Advanced system sketch map of resources for user equipment allocation result under the tdd mode;
Fig. 5 shows the flow chart according to the resource allocation methods of the embodiment of the invention 1;
Fig. 6 shows and mixes in the resource allocation methods, and the base station disposes to the resource of the subscriber equipment sketch map for all identical resource distribution result of all descending sub frames through RRC in advance;
Fig. 7 shows and mixes in the resource allocation methods, and the base station disposes the resource distribution result's who has nothing in common with each other for each descending sub frame to the resource of subscriber equipment sketch map in advance through RRC;
Fig. 8 shows in a kind of typical LTE-Advanced system sketch map of resources for user equipment allocation result under the tdd mode;
Fig. 9 shows in a kind of typical LTE-Advanced system sketch map of resources for user equipment allocation result under the tdd mode, and wherein, the method for counting of DAI is the number of the PDCCH on certain descending CC of statistics;
Figure 10 shows in a kind of typical LTE-Advanced system sketch map of resources for user equipment allocation result under the tdd mode, and wherein, the method for counting of DAI is the number of the PDSCH on certain descending CC of statistics;
Figure 11 shows the flow chart according to the resource allocation methods of the embodiment of the invention 2;
Figure 12 shows in the typical LTE-Advanced system sketch map of resources for user equipment allocation result under the fdd mode.
Figure 13 shows the flow chart according to the resource allocation methods of the embodiment of the invention 3;
Figure 14 shows the hardware capability block diagram according to base station 1400 of the present invention; And
Figure 15 shows the hardware capability block diagram according to subscriber equipment 1500 of the present invention.
Embodiment
At length set forth performing step of the present invention for clear, provided some specific embodiments of the present invention below, be applicable to wireless communication system, especially the LTE-Advanced cell mobile communication systems of supporting carrier aggregation technology.Need to prove, the invention is not restricted to these and use, but applicable to more other relevant wireless communication systems.
To a preferred embodiment of the present invention will be described in detail, in the description process, having omitted is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent understanding of the present invention caused.
Below, at first with reference to Fig. 1, select resource allocation methods to be described in detail to the channel that fdd mode in the LTE-Advanced system adopts.Fig. 1 shows a kind of sketch map of typical subscriber equipment end resource allocation result.
As shown in Figure 1; The base station is used for transfer of data to current user equipment 4 descending CC of configuration and 2 up CC; One of them descending CC and a up CC are configured to descending PCC and up PCC by the base station semi-staticly, and other descending CC is descending SCC, and other up CC is up SCC.According to the discussion result of present LTE-Advanced standardization meeting, the PUCCH of bearing downlink ACK/NACK feedback only transmits on a up CC, and promptly PUCCH only transmits on up PCC as shown in Figure 1; In addition, carrier dispatching is striden with support by the LTE-Advanced system, for example through the transmission of the PDCCH on descending PCC downlink resource assignment information A2, is used for the transmission of the PDSCH on the dispatching downlink SCC1.
In addition, as shown in Figure 1, this subscriber equipment is implemented the non-carrier dispatching of striding on descending PCC and descending SCC3, on descending SCC1 and descending SCC2, implements to stride carrier dispatching.Downlink resource on the descending PCC distributes the non-carrier wave ground of striding of A1 to distribute PDSCH on descending PCC, to transmit; The descending ACK/NACK feedback resources corresponding with this PDSCH obtains according to defined implicit expression resource distribution mode among the LTE, and the sequence number of first CCE that promptly can be mapped to through the PDCCH on the corresponding descending PCC of this downlink resource distribution obtains according to formula (1); Downlink resource distribution A2 on the descending PCC strides carrier wave ground and distributes PDSCH on descending SCC 1, to transmit, and the descending ACK/NACK feedback resources corresponding with this PDSCH also obtains according to defined implicit expression resource distribution mode among the LTE; Downlink resource distribution A3 on the descending SCC 1 strides carrier wave ground and distributes PDSCH on descending SCC 2, to transmit; The descending ACK/NACK feedback resources corresponding with this PDSCH distributes according to a kind of hybrid mode; Be that subscriber equipment is given through several resources of RRC signaling explicitly configuration in advance in the base station, indicate in the above-mentioned RRC resources configured by the ARI territory among the corresponding PDCCH of this PDSCH (being the PDCCH at A3 place) to subscriber equipment then; Downlink resource on the descending SCC 4 distributes the non-carrier wave ground of striding of A4 to distribute PDSCH on descending SCC 4, to transmit, and the descending ACK/NACK feedback resources corresponding with this PDSCH also distributes according to above-mentioned hybrid mode.Above-mentioned ARI territory can be at Downlink Control Information (Downlink Control Information among the LTE-Advanced; DCI) the new data field of introducing in the form; Also can reuse the original data field of DCI among the LTE, control (Transmission Power Control) territory etc. like through-put power.
Above-mentioned mixing resource distribution mode requires the base station to give user device configuration several downlink ACK/NACK feedback resources through RRC signaling explicitly in advance, is used to feed back the corresponding ACK/NACK information of PDSCH on some descending CC.When adopting above-mentioned mixing resource distribution mode, the base station disposes through RRC in advance can be for all CC all identical (CC-common) to the resource of subscriber equipment; Also can be for each CC incomplete same (CC-specific).It is the sketch map of the situation of CC-common and CC-specific through the resource that RRC disposes to subscriber equipment in advance that Fig. 2 and Fig. 3 show the base station respectively.As shown in Figure 2, the base station is that each descending CC of subscriber equipment is identical through the set of RRC resources configured, promptly all comprises 4 PUCCH resources, and sequence number is PUCCH (1)～PUCCH (4).ARI territory among the PDCCH that PDSCH on the different descending CC is corresponding at this moment all is from above-mentioned identical resource collection, to select a PUCCH resource allocation to give subscriber equipment.In Fig. 3; The base station is that each descending CC of subscriber equipment is incomplete same through the RRC resources configured; Can be fully different between resource collection PUCCH (the 1)～PUCCH (4) that promptly distributes to descending CC1 and the resource collection PUCCH (5) that the distributes to descending CC2～PUCCH (8), also can there be the part resource identical.Than the CC-common resource allocation method, the CC-specific resource allocation method need be reserved more PUCCH resource, but the procurement division that brings is sex-limited smaller.
Embodiment 1:
The channel that present embodiment is selected at the channel under the above-mentioned fdd mode to provide under a kind of tdd mode that adopts the CC binding on the basis of resource distribution mode is selected resource allocation methods.
Fig. 4 shows in a kind of typical LTE-Advanced system resources for user equipment allocation result under the tdd mode.In Fig. 4, with up-downgoing related (association) be 1: 4 be example, promptly some sub-frame of uplink need feed back the ACK/NACK information of four descending sub frames associated therewith.It is to be noted; The described resource allocation methods of present embodiment also goes for other up-downgoing association (having provided the related tabulation of all up-downgoings under the LTE system TDD mode in the table 1), as 1: 2, and 1: 3; 1: 9 etc., describe with comparatively typical 1: 4 scene here.
Up-downgoing linked list (selecting from non-references 1) under the table 1TDD pattern
Under the tdd mode of LTE-Advanced system; Scheduling situation according to the base station; Subscriber equipment not only has the corresponding ACK/NACK informational needs of transmission data on a plurality of descending sub frames to feed back to the base station, also has the corresponding ACK/NACK informational needs of transmission data on a plurality of descending CC to feed back to the base station on each subframe.These descending ACK/NACK feedback informations all will transmit on the up PCC of a sub-frame of uplink, so the load of the feedback of the ACK/NACK under the tdd mode will be much higher than the LTE system TDD mode in the LTE-Advanced system.For reducing the load of ACK/NACK feedback, subscriber equipment can adopt some binding technology.In the present embodiment; Subscriber equipment will adopt a kind of technology of CC binding; Promptly for some descending sub frames; The corresponding ACK/NACK information of transmission data on a plurality of CC bundlees the back and (notes as an overall ACK/NACK information bit of this descending sub frame; The corresponding ACK/NACK information of the transmission data of this moment on each CC at first will be done the spatial domain binding, if promptly on each descending sub frame the descending distribution of each CC corresponding be the transfer of data of a plurality of code words, will be corresponding to a plurality of ACK/NACK information of a plurality of code words through the ACK/NACK feedback information of a bit of logical AND operation becoming).With Fig. 4 be on four descending sub frames of example through four ACK/NACK information bits after spatial domain binding and the CC binding will according to LTE under the tdd mode identical channel selective mode send (promptly obtaining modulation symbols and the PUCCH resource of transmitting this modulation symbol) through question blank 2.In the present embodiment because adopted the CC binding, so the resource allocation methods that channel is selected only need be corresponding to each descending sub frame to descending ACK/NACK feedback resources of user side distribution.
The HARQ information of table 2 four bits and feedback resources and modulation symbol mapping table
(selecting from non-references 1)
For detecting discontinuous transmission (the Discrete Transmission that possibly exist in the descending distribution; DTX) problem; A descending distribution indication will be arranged among each descending distribution PDCCH, and (Downlink Assignment Indicator, DAI) data field is in order to the sum of descending distribution in the descending sub frame of indicating this descending distribution PDCCH place.Like this, in case the number of descending allotment that the subscriber equipment discovery is received and DAI indication is not inconsistent, then can produce a DTX as special ACK/NACK feedback information for this descending sub frame.The ACK/NACK information that this special ACK/NACK information will produce with other descending sub frames together according to LTE under the tdd mode identical channel selective mode send.It should be noted that the CC binding relates to all 3 descending CC among Fig. 4, thereby be a kind of full CC binding method.Also can adopt portion C C binding method in the LTE-Advanced system; For example 3 descending CC as shown in Figure 4 are divided into two groups; One group of 1 descending CC, another organizes 2 descending CC, carries out CC binding (have only certainly in the group of 1 CC and need not to carry out the CC binding in fact) respectively.Adopt the up-downgoing under the tdd mode that above-mentioned portion C C binding method and channel select related generally smaller, as 1: 2 etc.Although be noted that in the present embodiment with 3 descending CC to be example in addition, the described resource allocation methods of present embodiment also is applicable to the descending CC of other quantity.But when the bit number of DAI (as m) was not enough to indicate the descending distribution number of distributing in certain descending sub frame, the descending distribution number that value that can DAI is set to distribute in this descending sub frame was by 2
mResult behind the delivery.For example, descending have 5 CC, and the bit number of DAI is 2, if on 5 CC of certain descending sub frame scheduling is arranged all, then the DAI territory among the descending distribution of all on this descending sub frame PDCCH all is set to 5mod2
2=1.
With reference to Fig. 5 the feedback resource distribution method according to present embodiment is described below.
As shown in Figure 5, under the tdd mode that has adopted the CC binding, at first in step S501, judge whether there is PDSCH in some descending sub frames.If have PDSCH in this descending sub frame then execution in step S502, judge whether that a PDSCH transmits on PCC, perhaps have at least a PDSCH to stride carrier dispatching and transmit at SCC from PCC.If the judged result of step S502 is sure, then carry out following steps S503.Particularly,
Should be noted in the discussion above that the implicit expression resource distribution mode is not limited to according to formula (1) the descending ACK/NACK feedback resources of deriving.One of ordinary skill in the art it will also be appreciated that and adopt other formula and based on the implicit expression resource distribution mode of other indexs beyond the CCE sequence number.
Should be noted in the discussion above that the mode that resource distribution mode is not limited to above description of mixing.One of ordinary skill in the art it will also be appreciated that and adopt other to dispose some resources and indicate one of resource wherein to subscriber equipment with other data fields of PDCCH to the subscriber equipment explicitly.
If there is not descending scheduling in this descending sub frame, process is back to step S501, judges whether there is descending scheduling in next subframe.Though in the method flow diagram according to embodiment 1, adopt endless form by descending sub frame ground execution in step S501, one of ordinary skill in the art will recognize, also can adopt parallel mode, judge whether there is descending scheduling in a plurality of descending sub frames simultaneously.
In brief; Angle from subscriber equipment; Above-mentioned resource allocation methods can be expressed as: for some descending sub frames; If the indicated data dispatch of the descending distribution that subscriber equipment is received transmits on the principal component carrier wave; Or stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, subscriber equipment obtains the descending ACK/NACK feedback resources of a resource as this descending sub frame through the implicit expression resource distribution mode, otherwise subscriber equipment obtains the descending ACK/NACK feedback resources of a resource as this descending sub frame through mixing resource distribution mode.
Below, being that example is further introduced above-mentioned resource allocation methods for example like resources for user equipment allocation result under the tdd mode in the LTE-Advanced system among Fig. 4.Notice that the square frame representative of consumer equipment that numeral arranged among Fig. 4 has the PDSCH transfer of data on corresponding descending sub frame of this square frame and descending CC, the value of the DAI among the corresponding PDCCH of this PDSCH of the digitized representation in the square frame.
Have only a PDSCH in the 1st descending sub frame, on descending PCC, transmit, the DAI value among the pairing PDCCH of this PDSCH this moment is 1.If the descending distribution PDCCH that this PDSCH is corresponding is correctly received by UE; UE can be according to the implicit expression resource distribution mode among the aforementioned LTE, and the sequence number of first CCE that is mapped to through the pairing PDCCH of this PDSCH is derived a descending ACK/NACK feedback resources as the corresponding descending ACK/NACK feedback resources of this descending sub frame.
Also have only a PDSCH in the 2nd descending sub frame, transmission on descending SCC 1, the DAI value among the pairing PDCCH of this PDSCH this moment is 1.If the PDCCH corresponding to this PDSCH transmits (promptly this PDSCH strides carrier dispatching from PCC) on PCC; And this PDCCH is correctly received by UE; UE can be according to the implicit expression resource distribution mode among the aforementioned LTE, and the sequence number of first CCE that is mapped to through the pairing PDCCH of this PDSCH is derived a descending ACK/NACK feedback resources as the corresponding descending ACK/NACK feedback resources of this descending sub frame.If the PDCCH corresponding to this PDSCH transmits (promptly this PDSCH is non-that stride carrier dispatching or stride carrier dispatching from SCC) on SCC 1 or SCC2; And this PDCCH is correctly received by UE; UE can dispose to selecting one some resources of UE as the corresponding descending ACK/NACK feedback resources of this descending sub frame through RRC signaling explicitly from eNB according to aforementioned mixing resource distribution mode in advance, and which specifically selects then indicated by the ARI territory among the PDCCH.
If the PDCCH in the 1st or the 2nd descending sub frame is not correctly received by UE; UE produces a DTX as ACK/NACK information for this descending sub frame, can find out according to the channel selecting method in the table 2 this moment to need not the feedback resources into this descending sub frame allocation of downlink ACK/NACK.Particularly, for four HARQ information bits in the table 2 the 3rd, 8,12～19 kind of combination (corresponding to the PDCCH in the 1st descending sub frame not by the correct situation about receiving of UE), do not use feedback resources n
PUCCH, 0For four HARQ information bits in the table 2 the 3rd, 5,7～11,17～19 kind of combination (corresponding to the PDCCH in the 2nd descending sub frame not by the correct situation about receiving of UE), do not use feedback resources n
PUCCH, 1
In the 3rd descending sub frame two PDSCH are arranged, transmission on descending SCC 1 and SCC 2 respectively, the DAI value among these two pairing PDCCH of PDSCH all is 2 at this moment.If two all transmission (promptly two PDSCH stride carrier dispatching from PCC) on PCC of the pairing PDCCH of PDSCH; And these two PDCCH are correctly received by UE; UE can be according to the implicit expression resource distribution mode among the aforementioned LTE; Sequence number through one of them first CCE that is mapped among pairing two PDCCH of these two PDSCH is derived a descending ACK/NACK feedback resources, as the corresponding descending ACK/NACK feedback resources of this descending sub frame.As for concrete with the corresponding PDCCH of which PDSCH descending ACK/NACK feedback resources of deriving, certain rule of can making an appointment.Such as; Can be according to frequency height order, carrier wave sequence number (the Carrier Index of CC; CI) in proper order carrier wave indication territory (Carrier Indicator Field; CIF) the height sequential scheduling is selected that high or minimum PDCCH of ordering, can certainly be concrete with the corresponding PDCCH of which PDSCH descending ACK/NACK feedback resources of deriving through the RRC configuration.
If the PDSCH on the descending SCC 1 strides carrier dispatching from PCC; And the PDSCH on the descending SCC 2 is non-that stride carrier dispatching or stride carrier dispatching from SCC 1; And these two PDCCH are correctly received by UE; UE can be according to the implicit expression resource distribution mode among the aforementioned LTE; The sequence number of first CCE that is mapped to through the pairing PDCCH of the PDSCH on the SCC 1 is derived a descending ACK/NACK feedback resources, as the corresponding descending ACK/NACK feedback resources of this descending sub frame.
If PDSCH on the descending SCC 1 and the PDSCH on the descending SCC 2 are non-that stride carrier dispatching or stride carrier dispatching from SCC 2 and SCC 1 respectively; And these two PDCCH are correctly received by UE; UE can dispose to selecting one some resources of UE, as the corresponding descending ACK/NACK feedback resources of this descending sub frame through RRC signaling explicitly from eNB according to aforementioned mixing resource distribution mode in advance.Concrete which resource of selecting then indicated by the ARI territory among above-mentioned any PDCCH, because mention like the before resource allocation methods this moment, the ARI territory among these two PDCCH is CC-common, and promptly these two indicated resources in ARI territory are identical.
In the 4th descending sub frame two PDSCH are arranged also, transmission on PCC and SCC 1 respectively, the DAI value among these two pairing PDCCH of PDSCH all is 2 at this moment.If the PDSCH on the SCC 1 corresponding PDCCH (promptly strides carrier dispatching from PCC) on PCC; And these two PDCCH are correctly received by UE; UE can be according to the implicit expression resource distribution mode among the aforementioned LTE; Sequence number through first CCE that is mapped among pairing two PDCCH of these two PDSCH is derived a descending ACK/NACK feedback resources, as the corresponding descending ACK/NACK feedback resources of this descending sub frame.As for concrete with the corresponding PDCCH of which PDSCH descending ACK/NACK feedback resources of deriving, certain rule of can making an appointment.Such as, can select that high or minimum PDCCH of ordering according to frequency height order, carrier wave numeric order, the carrier wave indication territory height sequential scheduling of CC, can certainly be configured through RRC.In addition, first CCE that the corresponding PDCCH of PDSCH (the non-carrier dispatching of striding) that also can arrange to select in this case PCC to go up transmission is mapped to, descending ACK/NACK feedback resources is used to derive.
If the PDSCH on the SCC 1 is the non-carrier dispatching of striding; Or stride carrier dispatching from SCC 2; And the corresponding PDCCH of above-mentioned two PDSCH is correctly received by UE; UE can be according to the implicit expression resource distribution mode among the aforementioned LTE, and the sequence number of first CCE that is mapped to through the pairing PDCCH of the PDSCH on the PCC is derived a descending ACK/NACK feedback resources, as the corresponding descending ACK/NACK feedback resources of this descending sub frame.At this moment, any resource is not indicated in the ARI territory among the PDCCH of the PDSCH correspondence on the SCC 1, can reserve for other use.
If have at least one correctly not received among the PDCCH in the 3rd or the 4th descending sub frame by UE; The number of the PDCCH that UE correctly receives through DAI territory among the PDCCH that has more correctly received and UE reality can be judged and exists PDCCH not have the correctly fact of reception in the current subframe.UE will produce a DTX as special ACK/NACK information for this descending sub frame this moment.PDCCH with in the 1st or the 2nd descending sub frame is not the same by the correct situation that receives of UE, can find out according to the channel selecting method in the table 2 this moment to need not the feedback resources into this descending sub frame allocation of downlink ACK/NACK.
In the present embodiment when adopt mixing resource distribution mode; The base station in advance through RRC dispose to the resource of subscriber equipment can be all identical for all descending sub frames (subframe-common), also can be incomplete same for each descending sub frame (subframe-specific).It is the sketch map of the situation of subframe-common and subframe-specific through the resource that RRC disposes to subscriber equipment in advance that Fig. 6 and Fig. 7 show the base station respectively.As shown in Figure 6, the base station is that each descending sub frame of subscriber equipment is all identical through the set of RRC resources configured, promptly all comprises 4 PUCCH resources, and sequence number is PUCCH (1)～PUCCH (4).ARI territory among the PDCCH that PDSCH on the different descending sub frames is corresponding at this moment all is from an above-mentioned identical resource collection, to select one to distribute to subscriber equipment.In Fig. 7; The base station is that each descending sub frame of subscriber equipment is all incomplete same through the RRC resources configured; Can be fully different between resource collection PUCCH (the 1)～PUCCH (4) that promptly distributes to descending sub frame 1 and the resource collection PUCCH (5) that the distributes to descending sub frame 2～PUCCH (8), also can there be the part resource identical.Than the resource allocation method of subframe-common, subframe-specific resource allocation method need be reserved more PUCCH resource, but the procurement division that brings is sex-limited smaller.
Channel under the fdd mode that channel selection resource allocation methods under the tdd mode in the present embodiment and standardization have been passed through at present selects the difference of resource allocation methods mainly at following 2 points:
if there is not the data dispatch from PCC in certain descending sub frame, then the ARI territory indication among the PDCCH of the correspondence of the transfer of data (PDSCH) on all SCC is identical ACK/NACK feedback resources;
If there is the data dispatch from PCC in
in certain descending sub frame, what then all SCC went up transmission non-ly strides carrier dispatching or all need not to indicate the ACK/NACK feedback resources from the ARI territory that SCC strides the pairing PDCCH of PDSCH of carrier dispatching;
Above-mentionedly need not to indicate the ARI territory of ACK/NACK feedback resources to reserve for other use.If for example the ARI territory is to be reused by the TPC territory, then this moment, the ARI territory reverted to the TPC territory again, in order to indication ascending power adjustment information.
Adopt under the tdd mode that portion C C binding and channel select resource allocation methods to gather and use the resource allocation methods described in the present embodiment respectively to the CC of each part binding; Obtain channel and select needed ACK/NACK resource, wherein the CC set corresponding to each the part binding in each descending sub frame distributes an ACK/NACK feedback resources.Particularly, resource allocation methods is with the difference of adopting resource allocation methods under the tdd mode that full CC bundlees and channel is selected under the tdd mode of employing portion C C binding and channel selection:
Under the tdd mode that has adopted portion C C binding, for the CC set of some part bindings of some descending sub frames:
The corresponding semi-static resources configured of each CC set can be identical or incomplete same in the same descending sub frame in the above-mentioned mixing resource distribution mode.Each CC is integrated into semi-static resources configured corresponding in the different descending sub frames also can be identical or incomplete same.
Embodiment 2:
Described in embodiment 1, for reducing the load of ACK/NACK feedback under the LTE-Advanced system TDD mode, UE can adopt some binding technology.In the present embodiment; UE will adopt the technology of a kind of subframe binding (subframe bundling); Promptly for some descending CC; The corresponding reception result of data on a plurality of descending sub frames bundlees the back and feeds back as the overall ACK/NACK of this descending CC, the ACK/NACK information after the binding on a plurality of descending CC according to LTE under the tdd mode identical channel selective mode send.Different with the channel selective mode under the LTE-Advanced tdd mode that adopts the CC binding is that under the LTE-Advanced tdd mode that adopts the subframe binding, the ACK/NACK feedback result after each binding is at least 2 bits.Cause the reason of this difference to be, adopting the LTE-Advanced tdd mode DAI down of subframe binding is a pure counter (pure counter), and is a sum unlike the DAI under the LTE-Advanced tdd mode that adopts CC to bundle.Therefore; For each CC under the LTE-Advanced tdd mode that adopts the subframe binding; All exist UE whether correctly to receive the problem of last descending distribution PDCCH; Be that UE can't judge that which descending distribution PDCCH is last the descending distribution on this descending CC, cause in that to produce binding ACK/NACK at a loss as to what to do as a result the time.A solution to this problem is that UE adds the information of the DAI value of last the descending distribution PDCCH on this CC that receives in the binding ACK/NACK result who produces.Like this; The problem whether above-mentioned last descending distribution PDCCH UE correctly receives transfers to by eNB and solving: be not inconsistent if eNB finds the DAI value of last descending distribution that UE reports and the result that eNB dispatches, eNB can judge that UE has lost one or several last descending distribution PDCCH.Another solution to this problem is that UE adds the information of the sum of the descending distribution on this CC that receives in producing binding ACK/NACK result.Like this; The problem whether above-mentioned last descending distribution PDCCH UE correctly receives also transfers to by eNB and solving; If eNB finds the sum of the descending distribution that UE reports and the result of eNB scheduling and is not inconsistent that eNB can judge that UE has lost some or several descending distribution PDCCH wherein.In above-mentioned two kinds of solutions, which descending distribution PDCCH the latter can't be notified to eNB by the correct information that receives of UE as the former, but the latter can not need add the DAI territory in descending distribution, save the Downlink Control Information expense.
Because the ACK/NACK feedback result after each binding is at least 2 bits; Therefore the employing in the present embodiment tdd mode channel down of subframe binding select resource allocation methods to be applicable to the scene of 2 descending CC shown in Fig. 8 because channel selective mode supports the ACK/NACK of 4 bits to feed back at most.
The square frame representative of consumer equipment of noting having among Fig. 8 numeral has the PDSCH transfer of data on corresponding descending sub frame of this square frame and descending CC, the value of the DAI among the corresponding PDCCH of this PDSCH of the digitized representation in the square frame.DAI is a counter, two kinds of method of counting is arranged, like Fig. 9 and shown in Figure 10.Fig. 9 shows that the DAI counting is the number of the PDCCH on certain descending CC of statistics; Figure 10 shows that the DAI counting is the number of the PDSCH on certain descending CC of statistics.In order to show that DAI specifically counts the sign of the descending CC that also marks in Fig. 9 square frame to the PDCCH on which descending CC.
As shown in Figure 8, be that example is specifically introduced resource allocation with above-mentioned second kind of DAI method of counting in the present embodiment.With reference to Figure 11 the feedback resource distribution method according to present embodiment is described below.Shown in figure 11, under the tdd mode that has adopted the subframe binding, at first in step S1101, judge among some descending CC whether have PDSCH.If have PDSCH then execution in step S1102 among this descending CC, judge whether that a PDSCH transmits on PCC, perhaps have at least a PDSCH to stride carrier dispatching and transmit at SCC from PCC.If the judged result of step S1102 is sure, then carry out following steps S1103.Particularly,
n
PUCCH，1＝n
CCE+N
PUCCH (2)
n
PUCCH，2＝n
CCE+1+N
PUCCH (3)
Should be noted in the discussion above that the implicit expression resource distribution mode is not limited to according to formula (2) and (3) the descending ACK/NACK feedback resources of deriving.One of ordinary skill in the art it will also be appreciated that and adopt other formula and based on the implicit expression resource distribution mode of other indexs beyond the CCE sequence number.
If the judged result of step S1102 negates, execution in step S1104 then.Particularly,
If do not have descending scheduling among this descending CC, process is back to step S1101, judges whether there is descending scheduling among next CC.Though in the method flow diagram according to embodiment 2, adopt endless form by descending CC ground execution in step S1101, one of ordinary skill in the art will recognize, also can adopt parallel mode, judge whether there is descending scheduling among a plurality of CC simultaneously.
Notice that the prerequisite of aforementioned resource allocation is that can to find DAI be 0 descending distribution PDCCH (promptly indicating the corresponding PDSCH of this descending distribution PDCCH is first PDSCH that is dispatched on the CC of this PDSCH of transmission).If DAI is that the corresponding PDCCH UE of 0 PDSCH does not receive among the corresponding PDCCH on some descending CC; Then UE can produce the binding ACK/NACK information of a DTX for this descending CC, can find out according to the channel selecting method in the table 2 this moment to need not to be this descending CC allocation of downlink ACK/NACK feedback resources.
With similar among the embodiment 1, the descending ACK/NACK feedback resources for the semi-static configuration of each descending CC in the above-mentioned improved resource allocation hybrid mode also can be identical or incomplete same.
Embodiment 3:
Channel selective mode under the fdd mode in the LTE-Advanced system requires to use the spatial domain binding.If finally being proved, the spatial domain binding can cause performance loss; Thereby can not be used, the resource that descending ACK/NACK resource allocation methods is distributed under the then above-mentioned fdd mode will be not enough to through the above-mentioned ACK/NACK information that does not bundle through the spatial domain of channel selective mode transmission.
Figure 12 shows in a kind of typical LTE-Advanced system sketch map of resources for user equipment allocation result under the fdd mode.Shown in figure 12; Under the fdd mode in the LTE-Advanced system, if descending distribution A1 and A2 exist simultaneously, and A1 and/or A2 are the descending distribution of the downlink data transmission of indication two code words; Owing to can not use the spatial domain binding; Need the descending ACK/NACK bit number of feedback this moment is 3～4, and the descending ACK/NACK feedback resource distribution method of introducing according to the front only can distribute 2 resources, is not enough to support channel selective mode.
Present embodiment selects resource distribution mode to do the improvement in the similar embodiment 2 to the channel under the fdd mode in the LTE-Advanced system, to solve the above-mentioned shortage of resources problem that possibly occur.Figure 13 shows the flow chart according to the feedback resource distribution method of present embodiment.Shown in figure 13, in step S1301, select resource distribution mode according to the channel under the fdd mode in the aforementioned LTE-Advanced system, judgement should adopt the implicit expression resource distribution mode still to mix resource mode allocation of downlink ACK/NACK feedback resources.In step S1302 and S1303, judge that the PDSCH that is dispatched still is two codeword transmission corresponding to single codeword.For can adopting implicit expression resource distribution mode Resources allocation and be the PDSCH of single codeword transmission, execution in step S1304 that is: distributes single feedback resources to UE according to the fdd mode implicit expression resource distribution mode down in the aforementioned LTE-Advanced system.Mix the resource distribution mode Resources allocation and be the PDSCH of single codeword transmission for adopting, execution in step S1305 that is: distributes single feedback resources to UE according to the mixing resource distribution mode under the fdd mode in the aforementioned LTE-Advanced system.To adopting implicit expression resource distribution mode Resources allocation and being the PDSCH of dicode word transmission; Execution in step S1306; That is: the implicit expression resource distribution mode of aforementioned improved distributes two descending HARQ resources corresponding with this PDSCH to give UE; The sequence number of first CCE that one of them resource can be mapped to by the pairing PDCCH of this PDSCH is derived and is drawn, and the sequence number of first CCE that another can be mapped to by the pairing PDCCH of this PDSCH adds the sequence number that obtains after 1 and derives and draw.To adopting the PDSCH that mixes the resource distribution mode Resources allocation; Execution in step S1307 then; That is: adopt improved mixing resource distribution mode to distribute two descending HARQ resources corresponding to give UE with this PDSCH; Be that eNB can dispose some resources to UE through RRC signaling explicitly; Indicate two resources in the above-mentioned RRC resources configured to give UE by an ARI territory among the corresponding PDCCH of this PDSCH then, the corresponding relation between the data that indicate in the resource group that wherein can confirm in advance in advance to constitute through two resources in the RRC resources configured and ARI territory is not can misread between assurance UE and the eNB.
Illustrate above-mentioned feedback resource distribution method below in conjunction with Figure 12.
Shown in figure 12; Descending distribution A1 is the non-carrier dispatching of striding on the descending PCC; The PDSCH that distributes transmits on descending PCC, if this PDSCH is the transfer of data of single codeword, the descending ACK/NACK feedback resources corresponding with this PDSCH obtains according to the implicit expression resource distribution mode among the LTE; If this PDSCH is the transfer of data of two code words; ENB distributes two the descending ACK/NACK feedback resources corresponding with this PDSCH according to the improved implicit expression resource distribution mode in the present embodiment; Promptly can derive first resource through this descending sequence number of first CCE that the corresponding PDCCH on descending PCC be mapped to of distributing, adding 1 sequence number that produces through this descending sequence number of distributing first CCE that the corresponding PDCCH on descending PCC is mapped to derives second resource;
Descending distribution A2 is the carrier dispatching of striding on the top to bottm capable SCC 1 of descending PCC; The PDSCH that distributes transmits on descending SCC 1; If this PDSCH is the transfer of data of single codeword, the descending ACK/NACK feedback resources corresponding with this PDSCH also obtains according to implicit expression resource distribution mode among the LTE; If this PDSCH is the transfer of data of two code words, eNB distributes two the descending ACK/NACK feedback resources corresponding with this PDSCH according to the improved implicit expression resource distribution mode in the present embodiment;
Descending distribution A3 is descending SCC 1 to the descending SCC 2 strides carrier dispatching; The PDSCH that distributes transmits on descending SCC 2; If this PDSCH is the transfer of data of single codeword; The descending ACK/NACK feedback resources corresponding with this PDSCH distributes according to a kind of hybrid mode, and promptly eNB disposes some resources through RRC signaling explicitly in advance and gives UE, indicates one in the above-mentioned RRC resources configured to give UE by the ARI territory among the PDCCH of this PDSCH correspondence then; If this PDSCH is the transfer of data of two code words; ENB distributes two the descending ACK/NACK feedback resources corresponding with this PDSCH according to the improved mixing resource distribution mode in the present embodiment; Be that eNB passes through RRC signaling explicitly and disposes some resources and give UE; Indicate two resources in the above-mentioned RRC resources configured to give UE by an ARI territory among the corresponding PDCCH of this PDSCH then, wherein the corresponding relation between the data of indicating of the resource group that constitutes of two resources in the RRC resource allocation and ARI territory can be confirmed in advance in advance;
Descending distribution A4 is the non-carrier dispatching of striding on the descending SCC 4; The PDSCH that distributes transmits on descending SCC 4; If this PDSCH is the transfer of data of single codeword, a descending ACK/NACK feedback resources corresponding with this PDSCH distributes according to mixing resource distribution mode; If this PDSCH is the transfer of data of two code words, eNB distributes two the descending ACK/NACK feedback resources corresponding with this PDSCH according to the improved mixing resource distribution mode in the present embodiment.
Should be understood that present embodiment only is schematic and nonrestrictive.One of ordinary skill in the art can expect various changes and modification based on present embodiment.For example, judgement should be adopted step that the implicit expression resource distribution mode still mixes resource mode allocation of downlink ACK/NACK feedback resources and judge that the PDSCH that dispatched still is that the order of step of two codeword transmission can be changed corresponding to single codeword.PDSCH can extend to the situation of many codeword transmission corresponding to the situation of two codeword transmission.
[hardware capability realization]
Figure 14 shows the hardware capability block diagram according to base station 1400 of the present invention.Shown in figure 14, base station 1400 comprises: transmitting element 1410 is used for sending data based on data dispatch, and sends the data allocations of the said data dispatch of indication; Feedback resource allocation unit 1420; And receiving element 1430, be used to receive the descending ACK/NACK feedback information that subscriber equipment feeds back on the descending ACK/NACK feedback resources that is distributed.Wherein, corresponding to the method according to embodiment 1,2 and 3, feedback resource allocation unit 1420 has different functions respectively.
Particularly; Corresponding to method according to embodiment 1; Feedback resource allocation unit 1420 is used for: for the binding CC set of the descending sub frame that has data dispatch; If there is the scheduling of data on the principal component carrier wave, to transmit, perhaps have at least a data scheduling to stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, through the implicit expression resource distribution mode to the single descending ACK/NACK feedback resources of user equipment allocation; Otherwise, through mixing resource distribution mode to the single descending ACK/NACK feedback resources of user equipment allocation.
Corresponding to method according to embodiment 2; Feedback resource allocation unit 1420 is used for: for the downlink component carrier that has data dispatch; If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, distribute two descending ACK/NACK feedback resources through the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave; Otherwise, distribute two descending ACK/NACK feedback resources through mixing resource distribution mode.
Corresponding to the method according to embodiment 3, feedback resource allocation unit 1420 is used for: for the PDSCH of needs distribution ACK/NACK feedback resources, judge that it is single codeword transmission or many codeword transmission; If the single codeword transmission, according to the resource allocation methods under the fdd mode in the LTE-Advanced system, adopt implicit expression or mixing resource distribution mode to distribute single descending ACK/NACK feedback resources; If many codeword transmission, adopt improved implicit expression or mixing resource distribution mode to distribute a plurality of descending ACK/NACK feedback resources.
Figure 15 shows the hardware capability block diagram according to subscriber equipment 1500 of the present invention.Shown in figure 15, subscriber equipment 1500 comprises: receiving element 1510 is used to receive the base station based on the downlink data of data dispatch transmission and the data allocations of indicating said data dispatch; Feedback resources is confirmed unit 1520; And transmitting element 1530, be used for confirming feeding back downlink ACK/NACK feedback information on the feedback resources that the unit is confirmed by feedback resources.Wherein, corresponding to the method according to embodiment 1,2 and 3, feedback resources confirms that unit 1520 has different functions respectively.
Particularly; Corresponding to method according to embodiment 1; Feedback resources confirms that unit 1520 is used for: for the binding CC set of the descending sub frame that has data dispatch; If there is the scheduling of data on the principal component carrier wave, to transmit, perhaps have at least a data scheduling to stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, obtain single descending ACK/NACK feedback resources based on the implicit expression resource distribution mode; Otherwise, obtain single descending ACK/NACK feedback resources based on mixing resource distribution mode.
Corresponding to method according to embodiment 2; Feedback resources confirms that unit 1520 is used for: for the downlink component carrier that has data dispatch; If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, obtain two descending ACK/NACK feedback resources based on the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave; Otherwise, obtain two descending ACK/NACK feedback resources based on mixing resource distribution mode.
Corresponding to the method according to embodiment 3, feedback resources confirms that unit 1520 is used for: for the PDSCH of needs distribution ACK/NACK feedback resources, judge that it is single codeword transmission or many codeword transmission; If the single codeword transmission, according to the resource allocation methods under the fdd mode in the LTE-Advanced system, obtain single descending ACK/NACK feedback resources based on implicit expression or mixing resource distribution mode; If many codeword transmission, obtain a plurality of descending ACK/NACK feedback resources based on improved implicit expression or mixing resource distribution mode.
In above description, to each step, enumerated a plurality of instances, though the inventor indicates instance associated with each other as much as possible, this does not also mean that must there be corresponding relation in these instances according to corresponding label.As long as selected instance do not have contradiction between given condition, can in different steps, select the not corresponding instance of label to constitute the corresponding techniques scheme, such technical scheme also should be regarded as within the scope of the invention involved.
Should be noted in the discussion above that in above description,, show technical scheme of the present invention, but be not intended that the invention be limited to above-mentioned steps and cellular construction only with the mode of example.Under possible situation, can adjust and accept or reject step and cellular construction as required.Therefore, some step and unit are not the necessary element of overall invention thought of embodiment of the present invention.Therefore, technical characterictic essential to the invention only is subject to the minimum requirements that can realize overall invention thought of the present invention, and does not receive the restriction of above instantiation.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited accompanying claims.
Claims (17)
1. resource allocation methods to the ACK/NACK feedback that has adopted the component carrier binding comprises:
For the binding component carrier set of the descending sub frame that has data dispatch,
If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, distribute single descending ACK/NACK feedback resources through the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave;
Otherwise, distribute single descending ACK/NACK feedback resources through mixing resource distribution mode.
2. resource allocation methods according to claim 1, wherein, said component carrier binding is full component carrier binding, and said resource allocation methods comprises:
For the descending sub frame that has data dispatch,
If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, distribute single descending ACK/NACK feedback resources through the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave;
Otherwise, distribute single descending ACK/NACK feedback resources through mixing resource distribution mode.
3. resource allocation methods according to claim 1 and 2, wherein, said implicit expression resource distribution mode is derived descending ACK/NACK feedback resources based on the sequence number of first control channel unit CCE of being mapped to of data allocations of the said data dispatch of indication.
4. resource allocation methods according to claim 3; Wherein, If there is plural data dispatch to stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, agreement or dispose the sequence number of first CCE that said implicit expression resource distribution mode will be mapped to based on the pairing data allocations of which data dispatch through the RRC signaling in advance.
5. resource allocation methods according to claim 1 and 2, wherein, said mixing resource distribution mode is:
The base station disposes some resources through RRC signaling explicitly in advance and gives subscriber equipment; And
One in the RRC resources configured is indicated to subscriber equipment in ACK/NACK resource indication ARI territory by in the data allocations of said data dispatch correspondence.
6. it is all identical or have nothing in common with each other for each subframe for all subframes that resource allocation methods according to claim 5, base station dispose resource to subscriber equipment through RRC in advance.
7. resource allocation methods according to claim 1 and 2; If the data allocations that said data dispatch is corresponding is not correctly received by subscriber equipment; Subscriber equipment produces DTX as special ACK/NACK feedback, and need not allocation of downlink ACK/NACK feedback resources.
8. resource allocation methods according to claim 2, if feedback resources distributes through the implicit assignment mode, the ARI territory in all data allocations is used for to the information of subscriber equipment indication except that the ACK/NACK feedback resources.
9. base station comprises:
Transmitting element is used to send the descending sub frame that has data dispatch, and sends the data allocations of the said data dispatch of indication;
The feedback resource allocation unit is used for the binding component carrier set for the descending sub frame that has data dispatch,
If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, through the implicit expression resource distribution mode to the single descending ACK/NACK feedback resources of user equipment allocation;
Otherwise, through mixing resource distribution mode to the single descending ACK/NACK feedback resources of user equipment allocation; And
Receiving element is used to receive the descending ACK/NACK feedback information that subscriber equipment feeds back on the descending ACK/NACK feedback resources that is distributed.
10. base station according to claim 9, wherein, said component carrier binding is full component carrier binding, and said feedback resource allocation unit is used for:
For the descending sub frame that has data dispatch,
If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit at the component of degree n n carrier wave from the principal component carrier wave, through the implicit expression resource distribution mode to the single descending ACK/NACK feedback resources of user equipment allocation;
Otherwise, through mixing resource distribution mode to the single descending ACK/NACK feedback resources of user equipment allocation.
11. according to claim 9 or 10 described base stations, wherein, said implicit expression resource distribution mode is derived descending ACK/NACK feedback resources based on the sequence number of first CCE of being mapped to of data allocations of the said data dispatch of indication.
12. according to claim 9 or 10 described base stations, wherein, said mixing resource distribution mode is:
The base station disposes some resources through RRC signaling explicitly in advance and gives subscriber equipment; And
One in the RRC resources configured is indicated to subscriber equipment in ARI territory by in the data allocations of said data dispatch correspondence.
13. a subscriber equipment comprises:
Receiving element is used to receive descending sub frame that has data dispatch that sends the base station and the data allocations of indicating said data dispatch;
Feedback resources is confirmed the unit, is used for the binding component carrier set for the descending sub frame that has data dispatch,
If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, obtain single descending ACK/NACK feedback resources based on the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave;
Otherwise, obtain single descending ACK/NACK feedback resources based on mixing resource distribution mode; And
Transmitting element is used for being confirmed feeding back downlink ACK/NACK feedback information on the feedback resources that the unit is confirmed by feedback resources.
14. subscriber equipment according to claim 13, wherein, said component carrier binding is full component carrier binding, and said feedback resources confirms that the unit is used for:
For the descending sub frame that has data dispatch,
If a data scheduling is arranged to be transmitted on the principal component carrier wave; Perhaps have at least the scheduling of data to stride carrier dispatching and transmit, obtain single descending ACK/NACK feedback resources based on the implicit expression resource distribution mode at the component of degree n n carrier wave from the principal component carrier wave;
Otherwise, obtain single descending ACK/NACK feedback resources based on mixing resource distribution mode.
15. according to claim 13 or 14 described subscriber equipmenies, wherein, said implicit expression resource distribution mode is derived descending ACK/NACK feedback resources based on the sequence number of first CCE of being mapped to of data allocations of the said data dispatch of indication.
16. according to claim 13 or 14 described subscriber equipmenies, wherein, said mixing resource distribution mode is:
The base station disposes some resources through RRC signaling explicitly in advance and gives subscriber equipment; And
One in the RRC resources configured is indicated to subscriber equipment in ARI territory by in the data allocations of said data dispatch correspondence.
17. according to claim 13 or 14 described subscriber equipmenies, if indicate the data allocations of said data dispatch correctly not received by subscriber equipment, subscriber equipment produces DTX as special ACK/NACK feedback, and need not allocation of downlink ACK/NACK feedback resources.
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Application publication date: 20120411 |