CN101795177A - Method, system and equipment for back feeding retransmission confirmation information - Google Patents
Method, system and equipment for back feeding retransmission confirmation information Download PDFInfo
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Abstract
The invention provides a method, a system and equipment for back feeding retransmission confirmation information in a multi-carrier system, wherein the method comprises that: user equipment (UE) receives a plurality of downlink packets sent by a base station, and generates M retransmission confirmation information corresponding to the plurality of downlink packets, wherein M is larger than 4; the UE separates the M retransmission confirmation information into k groups according to grouping rules, and determines k groups of available feedback channel numbers and feedback information which correspond to the k groups of retransmission confirmation information according to mapping relations between the retransmission confirmation information and the available feedback channel numbers as well as between the retransmission confirmation information and the feedback information; and the UE transmits the k groups of feedback information to the base station on the available feedback channel numbers in the k groups of feedback channels of an uplink subframe. The method, the system and the equipment provided by the invention are easy to realize, applicable to FDD and TDD systems at the same time, and compatible to an LTE Release 8 system very well.
Description
Technical field
The present invention relates generally to the mobile communication technology field, relate in particular to the feedback of the retransmission confirmation information in the multicarrier system.
Background technology
For long-term evolution multi-carrier system, for supporting the system bandwidth wideer than LTE system, such as 100MHz, a kind of may be the frequency spectrum that directly distributes the 100M bandwidth, is illustrated in figure 1 as the single-frequency spectral system schematic; A kind of may be to distribute to some spectrum aggregatings of existing systems, gather into big bandwidth and supply with the long-term evolution multi-carrier system use, be that the user may take M 〉=1 carrier wave and carries out downlink transfer, N 〉=1 carrier wave carries out uplink, is illustrated in figure 2 as the spectrum aggregating system schematic.
The basic transmission plan of LTE (Long Term Evolution, the Long Term Evolution) system (Rel-8) that present standardization effort has been finished substantially is as follows: FDD system and TDD are respectively shown in Fig. 3,4.For each work carrier wave, defined downlink signaling, downlink data, up signaling and upstream data respectively, and transmission relation each other.The two ends of upstream control signaling band occupancy use the frequency hopping mode to transmit, and promptly in two time slots in a subframe, upstream control signaling will take different band transmissions.
When having opened the HARQ function in the descending transmission, UE (User Equipment, subscriber equipment) after finishing downlink data and receiving, to whether need the signaling that retransmits to base station feedback, be ACK (affirmation)/NACK (non-affirmation), wherein the ACK state representation does not retransmit, the NACK state representation needs to retransmit, and does not then use the DTX state representation if detect any information.
In the LTE system, the packet on each subframe is independently encoded, and packet on each subframe obtains so ACK/NACK information is based on.If carry out many code words (code word) transmission, be that system passes through the usage space multiplex technique, will be on same physical resource, multiplexing transmission belongs to same user's multiplex data stream, to comprise a plurality of data flow in the packet of a subframe, data on the different data flow will independently be encoded, and become code word.This moment, the LTE system supported two codeword transmission at most at present to obtaining 1 independently ACK/NACK behind each codeword decoding.
When the descending control signaling transmission is carried out in the base station, can distribute exclusive resource for each user, but feedback transmission for uplink ACK/NACK, the user does not know that other users use channel situation, for fear of the user resource contention takes place when feeding back, the UE that feeds back will be according to the resource number (n of its pairing descending control signaling of downlink data packet that receives
CCE), calculate it and carry out ACK/NACK and feed back employed resource or channel number (n
UL), n then
ULBe one about n
CCEFunction n
UL=f (n
CCE)+N
UL, N wherein
ULBe high-rise configuration parameter, this function satisfies one-to-one relationship, promptly different n
CCECan obtain different n after the mapping
UL
For LTE FDD system, its ascending-descending subframes quantity is always identical, and therefore always corresponding this sub-frame of uplink of descending sub frame carries out the ACK/NACK feedback transmission.But for LTE TDD system, because there is the various configurations ratio in its ascending-descending subframes, when descending number of sub frames is counted greater than sub-frame of uplink, UE then will feed back the ACK/NACK information on a plurality of descending sub frames in a sub-frame of uplink, and each descending sub frame all has a feedback channel numbering corresponding with it.
Support in the LTE TDD system at present a plurality of ACK/NACK information are carried out multiplexing transmission, will carry M the ACK/NACK feedback information on the descending sub frame in a sub-frame of uplink in the system of setting up departments, 1＜M≤4 wherein, the method for multiplexing transmission is:
At first, the ACK/NACK on a plurality of code words in each descending sub frame is carried out obtain a compound ACK/NACK after the logic add;
According to the concrete condition of the pairing compound ACK/NACK of M descending sub frame, table look-up 3～5, obtain 2 bit feedback information b (0), the channel number n that b (1) and transmission are used
UL, wherein:
Have M channel number in the sub-frame of uplink, unique corresponding with M descending sub frame respectively, promptly the pairing feedback channel of subframe m is numbered n
UL, m, m ∈ 0,1 ..., M-1}.
Table 1:TDD pattern uplink-downlink configuration (Uplink-downlink configurations)
Wherein, Uplink-downlink configuration is a uplink-downlink configuration, and Downlink-to-UplinkSwitch-point periodicity is descending-up switching point cycle, and Subframe number is a subframe numbers, wherein D represents descending Downlink, and U represents up Uplink.
To b (0), b (1) carries out resulting signal after the Base-Band Processing, will be numbered n
ULChannel on transmit.Following table has provided the descending sub frame position in same ascending resource correspondence, and pairing M number is 1 to 4.
Line correlation is provided with index (Downlink association set indexfor TDD) K:{k under the table 2:TDD
0, k
1... k
M-1}
The base station is by judging in M the available feedback channel on which channel data are arranged, and to the data on the feedback channel detect, demodulation, obtain concrete feedback information, 1～3 can know M the ACK/NACK state that belongs to same UE by tabling look-up, thereby judge M the Data Receiving situation on the descending sub frame.
Feedback combination during table 3:M=2
| ??HARQ-ACK(1)，HARQ-ACK(2) | ??n UL | ??b(0)，b(1) |
| ??ACK，ACK | ??n UL，1 | ??1，1 |
| ??ACK，NACK/DTX | ??n UL，0 | ??0，1 |
| ??NACK/DTX，ACK | ??n UL，1 | ??0，0 |
| ??NACK/DTX，NACK | ??n UL，1 | ??1，0 |
| ??NACK，DTX | ??n UL，0 | ??1，0 |
| ??DTX，DTX | ??N/A | ??N/A |
Feedback combination during table 4:M=3
| ??HARQ-ACK(1)，HARQ-ACK(2)，??HARQ-ACK(3) | ??n UL | ??b(0)，b(1) |
| ??ACK，ACK，ACK | ??n UL，2 | ??1，1 |
| ??ACK，ACK，NACK/DTX | ??n UL，1 | ??1，1 |
| ??ACK，NACK/DTX，ACK | ??n UL，0 | ??1，1 |
| ??ACK，NACK/DTX，NACK/DTX | ??n UL，0 | ??0，1 |
| ??NACK/DTX，ACK，ACK | ??n UL，2 | ??1，0 |
| ??NACK/DTX，ACK，NACK/DTX | ??n UL，1 | ??0，0 |
| ??NACK/DTX，NACK/DTX，ACK | ??n UL，2 | ??0，0 |
| ??DTX，DTX，NACK | ??n UL，2 | ??0，1 |
| ??DTX，NACK，NACK/DTX | ??n UL，1 | ??1，0 |
| ??NACK，NACK/DTX，NACK/DTX | ??n UL，0 | ??1，0 |
| ??DTX，DTX，DTX | ??N/A | ??N/A |
Feedback combination during table 5:M=4
The essence of this method promptly is to set up mapping relations one to one on the state of being made up of M ACK/NACK to be feedback and feedback channel and the feedback channel between information transmitted.Under the condition of not considering the DTX state, the status number that M ACK/NACK can form is 2
MAnd the status number that feedback channel in the said method and signal can be formed is M2
2When 1＜M≤4,2
M=＜M2
2, the method can operate as normal be represented the feedback information state; When M 5 the time, 2
M＞M2
2, this method can't be worked this moment.
Use the long evolving system of spectrum aggregating technology, when CU X descending carrier transmission data, processing such as the data on each descending carrier will independently be encoded, modulation, be that UE arrives the separate data in X road with parallel receive in a descending sub frame, and to carry out demodulation, decoding respectively to the X circuit-switched data, thereby produce X independently ACK/NACK feedback information, this moment, UE need transmit this X ACK/NACK feedback signal simultaneously in a sub-frame of uplink.For the TDD system, if sub-frame of uplink quantity is less than descending sub frame quantity in the system, then sub-frame of uplink also will carry the ACK/NACK feedback signal on a plurality of descending sub frames.
In research at present about the long evolving system that uses the spectrum aggregating technology, the situation that exists a downlink data packet pairing ACK/NACK informational needs in M 〉=5 to feed back in a sub-frame of uplink does not also have implementation at present for the feedback of ACK/NACK under this kind situation.
Summary of the invention
In order one of to address the above problem, the present invention proposes the retransmission confirmation information feedback method in a kind of multicarrier system, comprise: user equipment (UE) receives a plurality of downlink data packet that the base station sends, and producing M the retransmission confirmation information that corresponds respectively to described a plurality of downlink data packet, wherein said M is greater than 4; Described UE is divided into the k group according to rule of classification with a described M retransmission confirmation information, and, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information; Described UE will send to described base station in the described available feedback channel number of described k group feedback information in k feedback channel of a sub-frame of uplink.
According to embodiments of the invention, described method also comprises: if the number of described a plurality of downlink data packet smaller or equal to the number N of 4 times available uplink feedback channel, then described M equals the number of described a plurality of downlink data packet; If the number of described downlink data packet greater than 4N, then merges processing to the pairing a plurality of retransmission confirmation informations of described a plurality of downlink data packet, generate a described M retransmission confirmation information, so that M is smaller or equal to 4N.
According to embodiments of the invention, described rule of classification comprise according to the feedback resources number of reserving determine each group in the described k group retransmission confirmation information number p1, p2 ... pk, wherein said p1, p2 ... pk is smaller or equal to 4.
According to embodiments of the invention, described rule of classification comprises that with described k value be the number N that is not more than available uplink feedback channel.
According to embodiments of the invention, described rule of classification comprise with described k value for make described p1, p2 ... pk meets the minimum value that the feedback resources number of described reservation requires.
According to embodiments of the invention, described rule of classification is the number N that equals described available uplink feedback channel with described k value.
According to embodiments of the invention, described rule of classification comprises that a described M retransmission confirmation information is divided into average or uneven k to be organized.
According to embodiments of the invention, described rule of classification comprises fixing rule of classification.Described method also comprises: described UE receives described rule of classification by signaling, and described signaling comprises broadcast signaling and/or high-level signaling.
According to embodiments of the invention, described rule of classification comprises dynamic rule of classification.Described method also comprises: described UE receives described rule of classification by signaling, and described signaling comprises: high-level signaling and/or descending control indication signaling.
According to embodiments of the invention, described rule of classification comprises the pairing retransmission confirmation information of the packet of a plurality of descending sub frames of same carrier wave is preferentially divided into groups.
According to embodiments of the invention, described rule of classification comprises the pairing retransmission confirmation information of the packet of same descending sub frame in the multicarrier is preferentially divided into groups.
The invention allows for a kind of system, comprise base station and user equipment (UE).Described base station, be used for sending a plurality of downlink data packet to described UE, and send rule of classification to described UE by signaling, and receive M the retransmission confirmation information that described UE sends in a subframe corresponding to described a plurality of downlink data packet according to described rule of classification, wherein said M is greater than 4.Described UE, be used to receive a plurality of downlink data packet that described base station sends, generation corresponds respectively to M retransmission confirmation information of described a plurality of downlink data packet, and a described M retransmission confirmation information is divided into k group according to described rule of classification, and according to retransmission confirmation information and available feedback channel number, the mapping relations of feedback information, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information, and described k group feedback information is sent to described base station in the described available feedback channel number in k feedback channel of a sub-frame of uplink respectively.
The invention allows for a kind of base station, comprising: determination module, it is used for determining rule of classification; Sending module, it is used for sending a plurality of downlink data packet to UE, and sends described rule of classification by signaling to described UE; Receiver module, it is used for receiving M the retransmission confirmation information corresponding to described a plurality of downlink data packet that described UE sends a subframe according to described rule of classification, and wherein M is greater than 4.
The invention allows for a kind of user equipment (UE), comprise: receiver module, it is used to receive a plurality of downlink data packet that the base station sends, and receive the rule of classification that described base station sends by signaling, and producing M the retransmission confirmation information that corresponds respectively to described a plurality of downlink data packet, wherein said M is greater than 4; Grouping module, it is used for according to described rule of classification a described M retransmission confirmation information being divided into the k group, and, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information; Sending module, it is used for described k group feedback information is sent to described base station respectively in the described available feedback channel number of k feedback channel of a sub-frame of uplink.
The invention allows for the retransmission confirmation information feedback method in the another kind of multicarrier system, comprise: user equipment (UE) receives M the downlink data packet that the base station sends, and producing M retransmission confirmation information corresponding to a described M downlink data packet, wherein said M is greater than 4; Described UE is according to the mapping relations of retransmission confirmation information and feedback channel, feedback information, determines to number and N organizes feedback information corresponding to N feedback channel of a described M retransmission confirmation information; Described UE sends to described base station with described N group feedback information on described N feedback channel of a sub-frame of uplink.
According to embodiments of the invention, described mapping relations comprise that the number N of the described feedback channel of described M retransmission confirmation information correspondence satisfies
Wherein said k is the bit number that carries in each described feedback channel.
According to embodiments of the invention, the bit number k that carries in described each feedback channel is 1 or 2.
According to embodiments of the invention, the mapping relations between described retransmission confirmation information and feedback channel, the feedback information are the relation of shining upon one by one.
According to embodiments of the invention, described method also comprises: if comprise a plurality of code words in a packet, then the pairing retransmission confirmation information of described a plurality of code words that belongs to same packet is merged processing, generate a retransmission confirmation information.
According to embodiments of the invention, described UE is by reading the mapping relations that memory obtains described retransmission confirmation information and feedback channel, feedback information.
The invention allows for a kind of system, comprise base station and user equipment (UE).Described base station, be used for sending M downlink data packet to described UE, and receive the feedback information that described UE sends in the feedback channel of a sub-frame of uplink, obtain retransmission confirmation information corresponding to a described M downlink data packet according to the mapping relations of retransmission confirmation information and feedback channel, feedback information, wherein said M is greater than 4.Described UE, be used to receive M the downlink data packet that the base station sends, generation is corresponding to M retransmission confirmation information of a described M downlink data packet, and according to the mapping relations of described retransmission confirmation information and feedback channel, feedback information, determine to organize feedback information, and described N is organized feedback information on described N feedback channel of a sub-frame of uplink, send to described base station corresponding to N the feedback channel and the N of a described M retransmission confirmation information.
The invention allows for a kind of base station, comprising: sending module, it is used for sending M downlink data packet to described UE, and wherein said M is greater than 4; Receiver module, it is used for receiving the feedback information that described UE sends at the feedback channel of a sub-frame of uplink; Acquisition module, it is used for obtaining retransmission confirmation information corresponding to a described M downlink data packet according to the mapping relations of retransmission confirmation information and feedback channel, feedback information.
According to embodiments of the invention, described base station also comprises memory module.Described memory module is used to store the mapping relations of described retransmission confirmation information and feedback channel, feedback information.Described acquisition module also is used to read described memory module to obtain the mapping relations of described retransmission confirmation information and feedback channel, feedback information.
The invention allows for a kind of user equipment (UE), comprising: receiver module, it is used to receive M the downlink data packet that the base station sends, and produces M retransmission confirmation information corresponding to a described M downlink data packet, and wherein said M is greater than 4; Determination module, it is used for the mapping relations according to described retransmission confirmation information and feedback channel, feedback information, determines to organize feedback information corresponding to N the feedback channel and the N of a described M retransmission confirmation information; Sending module, it is used for described N group feedback information is sent to the base station on described N feedback channel of a sub-frame of uplink.
According to embodiments of the invention, described UE also comprises memory module.Described memory module is used to store the mapping relations of described retransmission confirmation information and feedback channel, feedback information.Described determination module also is used to read described memory module to obtain the mapping relations of described retransmission confirmation information and feedback channel, feedback information.
Message feedback method proposed by the invention, system and equipment, realized that in the long evolving system that uses the spectrum aggregating technology UE uses the method for multi-channel multiplexing transmission to transmit the scheme of the pairing retransmission confirmation information of a plurality of downlink data packet in a sub-frame of uplink.Scheme of the present invention is easy to implement, is applicable to FDD and TDD system simultaneously, and can well with LTE Release 8 system compatibles.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the single-frequency spectral system schematic;
Fig. 2 is the spectrum aggregating system schematic;
Fig. 3 is the FDD system schematic;
Fig. 4 is the TDD system schematic;
Fig. 5 is the flow chart of an embodiment of retransmission confirmation information feedback method of the present invention;
Fig. 6 is the functional structure chart of an embodiment of system of the present invention;
Fig. 7 is the flow chart of an embodiment of retransmission confirmation information feedback method of the present invention;
Fig. 8 is the functional structure chart of an embodiment of system of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention proposes a kind of message feedback method, be illustrated in figure 5 as the flow chart of an embodiment of message feedback method of the present invention, this method 100 comprises:
S101:UE receives a plurality of downlink data packet that the base station sends, and produces M the retransmission confirmation information that corresponds respectively to described a plurality of downlink data packet, and wherein said M is greater than 4.Wherein, retransmission confirmation information can comprise ACK, NACK, DTX etc.ACK represents correct reception, and the expression base station does not need to retransmit, and NACK represents correctly not receive, and DTX represents not receive, and the expression base station need retransmit.
As embodiments of the invention, if the number of a plurality of downlink data packet smaller or equal to the number N of 4 times available uplink feedback channel, then M equals the number of a plurality of downlink data packet; If the number of downlink data packet is greater than 4N, then the pairing a plurality of retransmission confirmation informations of a plurality of downlink data packet are merged processing, for example, carry out logic add, generate M retransmission confirmation information, so that the number M of retransmission confirmation information to be sent is smaller or equal to 4N.
S102:UE is divided into the k group according to rule of classification with M retransmission confirmation information, and, determine to correspond respectively to the k group available feedback channel number and the feedback information of k group retransmission confirmation information according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information.Wherein, on k feedback channel, the PUCCH that feedback channel promptly uses (Physical Uplink Control Channel) can only use a PUCCH to the channel number of k group available feedback in single-carrier system, can number with M=4 feedback channel in a PUCCH respectively.For multicarrier system, may use k PUCCH, k uplink feedback channel just can be arranged.
S103:UE will send to described base station in the available feedback channel number of above-mentioned k group feedback information in k feedback channel of a sub-frame of uplink.
As embodiments of the invention, rule of classification can comprise according to the feedback resources number of reserving determine each group among the k group ACK/NACK number p 1, p2 ... pk.For example, according to the method for existing 1＜P≤4, the M of M 〉=5 is divided into k group, total M=P1+P2+...Pk.So 2
P1+ 2
P2+ ... 2
Pk=＜(P1+P2+...Pk) 2
2, wherein, 1＜Pk≤4.Like this, the number of every group of retransmission confirmation information is less than the number that can carry in the existing system, can be according to the mapping relations of existing retransmission confirmation information and feedback channel, feedback information, for example above-mentioned table 3-5 determines feedback channel n respectively to every group of retransmission confirmation information
ULWith feedback information b (0), b (1).
As embodiments of the invention, above-mentioned grouping number k is equal to or less than the number N of operable uplink feedback channel in the multicarrier system, i.e. N 〉=k.
As embodiments of the invention, can pay the utmost attention to the restriction of group number, promptly at first determine the value of k.
As embodiments of the invention, can use minimum group to count k.For example, as far as possible at 4 pairing retransmission confirmation informations of downlink data packet of each uplink feedback channel feedback.Adopt this embodiment, can effectively reduce uplink transmission power.
As an alternative embodiment of the invention, can use maximum group to count k, for example, use the uplink feedback channel of maximum number to send retransmission confirmation information, i.e. k=N as far as possible.
As embodiments of the invention, the value of the number P of every group of retransmission confirmation information is can right and wrong average.For example, the retransmission confirmation information information of M 〉=5 downlink data packet is divided into some groups, wherein every group is satisfied 1＜Pk≤4.For example, M=5 can be divided into N=2 group according to unalterable rules, P1=2 and P2=3, and perhaps P1=4 and P2=1, the downlink data packet in every group is fed back according to existing feedback method.This method needs between base station and the subscriber equipment to provide for each M value and uplink feedback channel number the mapping relations of a grouping.
The beneficial effect of this embodiment is to take into consideration with scheduling the feedback resources of reservation.For example, if do not consider that reserved resource is so under the situation for M=5, if N=2 is arranged, when reserved resource, the every group of resource that all will reserve M=4 is if determined P1=4, the grouping of P2=1, reserved resource just can be M=4 and M=1 so, can save reserved resource.
As embodiments of the invention, the value of the number P of every group of retransmission confirmation information can be an average packet, promptly according to one group of P downlink data packet the method average packet, wherein to satisfy 1＜P≤4, the group number be:
Wherein
Expression rounds up to the merchant of M/P, and wherein when M mod P＞0, the size of one of them group is:
Wherein
Expression rounds downwards the merchant of M/P.For example, M=5, N uplink feedback channel group counted N=2, P1=3 so, P2=2.
As one embodiment of the present of invention, can use certain rule of classification at the regular hour internal fixation, promptly adopt fixing rule of classification.
As one embodiment of the present of invention, can in the regular hour according to the change in resources situation, promptly adopt dynamic rule of classification.
For example, N the uplink feedback channel number that same subframe is used in the multicarrier system can change rule of classification because of ascending power is limited.M=8 for example, the principle N=3 according to mean allocation is divided into P1=3, P2=3, P3=2, when ascending power was limited, next sub-frame of uplink can only transmit 2 uplink feedback channel, needs to change N=2 so, is divided into P1=4, P2=4.
Again for example, can reduce needs according to the uplink feedback channel number and redefine rule of classification.
As embodiments of the invention, the notice of above-mentioned rule of classification needs the signaling indication notice between base station and the user.For example, fixing rule of classification relative cycle is longer, can think a kind of semi-static variation, and the base station can be by sending broadcast signaling and/or high-level signaling notifying user equipment.Again for example, dynamic rule of classification transformation period is very fast, and grouping is flexible, and the base station can be by sending high-level signaling and/or descending control indication signaling notifying user equipment.
As one embodiment of the present of invention, arrangement during grouping or counting sequence can be a plurality of descending sub frames of the same carrier wave of preferential counting, promptly when the time in multicarrier system, feed back the packet resource of a plurality of descending sub frames in the same carrier wave of prioritization in every group, represent the pairing ACK/NACK information of a plurality of downlink data packet of a plurality of subframes more successively.
As one embodiment of the present of invention, rule of classification can preferentially be counted the same descending sub frame of a plurality of carrier waves when grouping, promptly when multicarrier system, feed back the packet resource in the same descending sub frame of prioritization in every group, represent the pairing ACK/NACK information of a plurality of downlink data packet of a plurality of carrier waves more successively.
Be illustrated in figure 6 as the functional structure chart of an embodiment of system of the present invention, described system comprises base station 200 and UE300.
Wherein, base station 200 is used for sending a plurality of downlink data packet to UE300, and send rule of classification to UE300 by signaling, and receive M the retransmission confirmation information that UE300 sends in a subframe corresponding to described a plurality of downlink data packet according to rule of classification, wherein M is greater than 4.
UE300 is used to receive a plurality of downlink data packet that base station 200 sends, generation corresponds respectively to M retransmission confirmation information of described a plurality of downlink data packet, and a described M retransmission confirmation information is divided into k group according to rule of classification, and according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information, and k is organized feedback information send to base station 200 in the available feedback channel number in k feedback channel of a sub-frame of uplink respectively.
As shown in Figure 6, base station 200 comprises determination module 201, sending module 202 and receiver module 203.Wherein, determination module 201 is used for determining rule of classification; Sending module 202 is used for sending a plurality of downlink data packet to UE300, and sends described rule of classification by signaling to UE300; Receiver module 203 is used for receiving M the retransmission confirmation information corresponding to described a plurality of downlink data packet that UE300 sends a subframe according to rule of classification, and wherein M is greater than 4.
As shown in Figure 6, UE300 comprises receiver module 301, grouping module 302 and sending module 303.Wherein, receiver module 301 is used to receive a plurality of downlink data packet that base station 200 sends, and receives the rule of classification that base station 200 sends by signaling, and produces M the retransmission confirmation information that corresponds respectively to described a plurality of downlink data packet, and wherein said M is greater than 4; Grouping module 302 is used for according to rule of classification M retransmission confirmation information being divided into the k group, and, determine to correspond respectively to the k group available feedback channel number and the feedback information of k group retransmission confirmation information according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information; Sending module 303 is used for that k is organized feedback information and sends to base station 200 respectively in the available feedback channel number of k feedback channel of a sub-frame of uplink.
Be illustrated in figure 7 as the flow chart of another embodiment 400 of retransmission confirmation information feedback method of the present invention, may further comprise the steps:
S401:UE receives M the downlink data packet that the base station sends, and produces M retransmission confirmation information corresponding to M downlink data packet, and wherein M is greater than 4.Wherein, retransmission confirmation information can comprise ACK, NACK, DTX etc.ACK represents correct reception, and the expression base station does not need to retransmit.NACK represents correctly not receive, and DTX represents not receive, and the expression base station need retransmit.
As one embodiment of the present of invention, if comprise a plurality of code words in a packet, then the pairing retransmission confirmation information of a plurality of code words that belongs to same packet is merged processing, for example, carry out logic add, generate a compound retransmission confirmation information.
S402:UE is according to the mapping relations of retransmission confirmation information and feedback channel numbering, feedback information, determines to organize feedback information corresponding to N the feedback channel and the N of a described M retransmission confirmation information.
As one embodiment of the present of invention, in described mapping relations, the number N of the described feedback channel of M retransmission confirmation information correspondence satisfies
N=1 wherein, 2,3......,
K is the bit number that carries in each described feedback channel,
Expression meets
The minimum value of the n value of condition.As one embodiment of the present of invention, the bit number k that carries in each feedback channel can be 1 or 2.
As one embodiment of the present of invention, carrying 2 bit feedback information in each feedback channel, i.e. k=2, then each corresponding one group of N channel number of state to be feedback and 2 of forming by M retransmission confirmation information
NBit feedback information.As embodiments of the invention, the number N of feedback channel satisfies
As one embodiment of the present of invention, if
Then not only can distinguish ACK, NACK state to each packet this moment, can also distinguish the DTX state.
For example, when M=5, obtain N=2, then each feedback combination that 5 retransmission confirmation informations are formed all corresponding 2 different feedback channels and 4 bit feedback information, promptly UE will use 2 corresponding feedback channels to transmit 4 bit feedback information in a sub-frame of uplink this moment, carrying 2 bit feedback information in each feedback channel.
As embodiments of the invention, the mapping relations between retransmission confirmation information and feedback channel, the feedback information can be the relation of shining upon one by one.
S403:UE organizes feedback information with N and send to the base station on N feedback channel of a sub-frame of uplink.
As one embodiment of the present of invention, UE is stored in the mapping relations of retransmission confirmation information and feedback channel, feedback information in the memory in advance, obtains this mapping relations by reading memory.For example, UE searches the mapping table in the memory according to the situation of M retransmission confirmation information that meets, and obtains information to be feedback and corresponding feedback channel.After feedback information carried out Base-Band Processing, use the respective feedback channel to transmit.
Be illustrated in figure 8 as the functional structure chart of an embodiment of system of the present invention.This system comprises base station 500 and UE600.
Wherein, base station 500 is used for sending M downlink data packet to UE600, and receive the feedback information that UE600 sends in the feedback channel of a sub-frame of uplink, obtain retransmission confirmation information corresponding to a described M downlink data packet according to the mapping relations of retransmission confirmation information and feedback channel, feedback information, wherein M is greater than 4.As one embodiment of the present of invention, there are data base station 500 by judging on which available feedback channel, and to the feedback information data of carrying on each feedback channel detect, demodulation obtains concrete feedback information, can know M retransmission confirmation information state by looking into the mapping relations form, thereby judge the Data Receiving situation on M the descending sub frame.
UE600 is used to receive M the downlink data packet that base station 500 sends, generation is corresponding to M retransmission confirmation information of M downlink data packet, and according to the mapping relations of retransmission confirmation information and feedback channel, feedback information, determine to organize feedback information, and N is organized feedback information on above-mentioned N feedback channel of a sub-frame of uplink, send to base station 500 corresponding to N the feedback channel and the N of M retransmission confirmation information.
As shown in Figure 8, base station 500 comprises sending module 501, receiver module 502 and acquisition module 503.Wherein, sending module 501 is used for sending M downlink data packet to UE600, and wherein M is greater than 4.Receiver module 502 is used for receiving the feedback information that UE600 sends at the feedback channel of a sub-frame of uplink.Acquisition module 503 is used for obtaining retransmission confirmation information corresponding to M downlink data packet according to the mapping relations of retransmission confirmation information and feedback channel, feedback information.
As one embodiment of the present of invention, base station 500 also comprises memory module 504, is used to store the mapping relations of described retransmission confirmation information and feedback channel, feedback information.In this embodiment, acquisition module 503 also is used to read described memory module to obtain the mapping relations of retransmission confirmation information and feedback channel, feedback information.
As shown in Figure 8, UE600 comprises receiver module 601, determination module 602 and sending module 603.Wherein, receiver module 601 is used to receive M the downlink data packet that base station 500 sends, and produces M retransmission confirmation information corresponding to M downlink data packet, and wherein M is greater than 4.Determination module 602 is used for the mapping relations according to retransmission confirmation information and feedback channel, feedback information, determines to organize feedback information corresponding to N the feedback channel and the N of M retransmission confirmation information.Sending module 603 is used for that N is organized feedback information and sends to base station 500 on N feedback channel of a sub-frame of uplink.
As one embodiment of the present of invention, UE600 also comprises memory module 604, and it is used to store the mapping relations of described retransmission confirmation information and feedback channel, feedback information.In this embodiment, determination module 602 also is used to read memory module to obtain the mapping relations of retransmission confirmation information and feedback channel, feedback information.
The embodiment of message feedback method proposed by the invention, system and equipment, proposed in the long evolving system that uses the spectrum aggregating technology, UE uses the method for multi-channel multiplexing transmission, the scheme of the pairing ACK/NACK of a plurality of downlink data packet of transmission in a sub-frame of uplink.This scheme is easy to realize, is applicable to FDD and TDD system simultaneously, and can well with LTE Release 8 system compatibles.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (25)
1. the retransmission confirmation information feedback method in the multicarrier system is characterized in that, comprising:
User equipment (UE) receives a plurality of downlink data packet that the base station sends, and produces M the retransmission confirmation information that corresponds respectively to described a plurality of downlink data packet, and wherein said M is greater than 4;
Described UE is divided into the k group according to rule of classification with a described M retransmission confirmation information, and, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information;
Described UE will send to described base station in the described available feedback channel number of described k group feedback information in k feedback channel of a sub-frame of uplink.
2. retransmission confirmation information feedback method according to claim 1 is characterized in that, also comprises:
If the number of described a plurality of downlink data packet is smaller or equal to the number N of 4 times available uplink feedback channel, then described retransmission confirmation information number M equals the number of described a plurality of downlink data packet;
If the number of described downlink data packet greater than 4N, then merges processing to the pairing a plurality of retransmission confirmation informations of described a plurality of downlink data packet, generate a described M retransmission confirmation information, so that M is smaller or equal to 4N.
3. retransmission confirmation information feedback method according to claim 2 is characterized in that,
Described rule of classification comprise according to the feedback resources number of reserving in each uplink feedback channel determine each group in the described k group retransmission confirmation information number p1, p2 ... pk, wherein said p1, p2 ... pk is smaller or equal to 4.
4. retransmission confirmation information feedback method according to claim 2 is characterized in that,
Described rule of classification comprises that with described group of number k value be the number N that is not more than available uplink feedback channel.
5. according to each described retransmission confirmation information feedback method of claim 2-4, it is characterized in that,
Described rule of classification comprise with described group of number k value for make described p1, p2 ... pk meets the minimum value that the feedback resources number of described reservation requires.
6. according to each described retransmission confirmation information feedback method of claim 2-4, it is characterized in that,
Described rule of classification is the number N that equals described available uplink feedback channel with described k value.
7. according to each described retransmission confirmation information feedback method of claim 2-4, it is characterized in that,
Described rule of classification comprises that a described M retransmission confirmation information is divided into average or uneven k to be organized.
8. retransmission confirmation information feedback method according to claim 1 and 2 is characterized in that,
Described rule of classification comprises fixing rule of classification,
Described method also comprises:
Described UE receives described rule of classification by signaling, and described signaling comprises broadcast signaling and/or high-level signaling.
9. retransmission confirmation information feedback method according to claim 1 and 2 is characterized in that,
Described rule of classification comprises dynamic rule of classification,
Described method also comprises:
Described UE receives described rule of classification by signaling, and described signaling comprises: high-level signaling and/or descending control indication signaling.
10. retransmission confirmation information feedback method according to claim 1 and 2 is characterized in that,
Described rule of classification comprises the pairing retransmission confirmation information of the packet of a plurality of descending sub frames of same carrier wave is preferentially divided into groups.
11. retransmission confirmation information feedback method according to claim 1 and 2 is characterized in that,
Described rule of classification comprises the pairing retransmission confirmation information of the packet of same descending sub frame in the multicarrier is preferentially divided into groups.
12. a system is characterized in that, comprises base station and user equipment (UE),
Described base station, be used for sending a plurality of downlink data packet to described UE, and send rule of classification to described UE by signaling, and receive M the retransmission confirmation information that described UE sends in a subframe corresponding to described a plurality of downlink data packet according to described rule of classification, wherein said M is greater than 4;
Described UE, be used to receive a plurality of downlink data packet that described base station sends, generation corresponds respectively to M retransmission confirmation information of described a plurality of downlink data packet, and a described M retransmission confirmation information is divided into k group according to described rule of classification, and according to retransmission confirmation information and available feedback channel number, the mapping relations of feedback information, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information, and described k group feedback information is sent to described base station in the described available feedback channel number in k feedback channel of a sub-frame of uplink respectively.
13. a base station is characterized in that, comprising:
Determination module, it is used for determining rule of classification;
Sending module, it is used for sending a plurality of downlink data packet to UE, and sends described rule of classification by signaling to described UE;
Receiver module, it is used for receiving M the retransmission confirmation information corresponding to described a plurality of downlink data packet that described UE sends a subframe according to described rule of classification, and wherein M is greater than 4.
14. a user equipment (UE) is characterized in that, comprising:
Receiver module, it is used to receive a plurality of downlink data packet that the base station sends, and receives the rule of classification that described base station sends by signaling, and produces M the retransmission confirmation information that corresponds respectively to described a plurality of downlink data packet, and wherein said M is greater than 4;
Grouping module, it is used for according to described rule of classification a described M retransmission confirmation information being divided into the k group, and, determine to correspond respectively to the k group available feedback channel number and the feedback information of described k group retransmission confirmation information according to the mapping relations of retransmission confirmation information and available feedback channel number, feedback information;
Sending module, it is used for described k group feedback information is sent to described base station respectively in the described available feedback channel number of k feedback channel of a sub-frame of uplink.
15. the retransmission confirmation information feedback method in the multicarrier system is characterized in that, comprising:
User equipment (UE) receives M the downlink data packet that the base station sends, and produces M retransmission confirmation information corresponding to a described M downlink data packet, and wherein said M is greater than 4;
Described UE is according to the mapping relations of retransmission confirmation information and feedback channel, feedback information, determines to organize feedback information corresponding to N the feedback channel and the N of a described M retransmission confirmation information;
Described UE sends to described base station with described N group feedback information on described N feedback channel of a sub-frame of uplink.
16. retransmission confirmation information feedback method according to claim 15 is characterized in that,
Described mapping relations comprise that the number N of the described feedback channel of described M retransmission confirmation information correspondence satisfies
Wherein said k is the bit number that carries in each described feedback channel.
17. retransmission confirmation information feedback method according to claim 16 is characterized in that,
The bit number k that carries in described each feedback channel is 1 or 2.
18. retransmission confirmation information feedback method according to claim 16 is characterized in that,
Mapping relations between described retransmission confirmation information and feedback channel, the feedback information are the relation of shining upon one by one.
19. retransmission confirmation information feedback method according to claim 15 is characterized in that, also comprises:
If comprise a plurality of code words in the packet, then the pairing retransmission confirmation information of described a plurality of code words that belongs to same packet is merged processing, generate a retransmission confirmation information.
20. according to each described retransmission confirmation information feedback method of claim 15-17, it is characterized in that,
Described UE is by reading the mapping relations that memory obtains described retransmission confirmation information and feedback channel numbering, feedback information.
21. a system is characterized in that, comprises base station and user equipment (UE),
Described base station, be used for sending M downlink data packet to described UE, and receive the feedback information that sends on the feedback channel of described UE in a sub-frame of uplink, obtain retransmission confirmation information corresponding to a described M downlink data packet according to the mapping relations of retransmission confirmation information and feedback channel, feedback information, wherein said M is greater than 4;
Described UE, be used to receive M the downlink data packet that described base station sends, generation is corresponding to M retransmission confirmation information of a described M downlink data packet, and according to the mapping relations of described retransmission confirmation information and feedback channel, feedback information, determine to organize feedback information, and described N is organized feedback information on described N feedback channel of a sub-frame of uplink, send to described base station corresponding to N the feedback channel and the N of a described M retransmission confirmation information.
22. a base station is characterized in that, comprising:
Sending module, it is used for sending M downlink data packet to described UE, and wherein said M is greater than 4;
Receiver module, it is used to receive the feedback information that described UE sends on the feedback channel of a sub-frame of uplink;
Acquisition module, it is used for obtaining retransmission confirmation information corresponding to a described M downlink data packet according to the mapping relations of retransmission confirmation information and feedback channel, feedback information.
23. base station according to claim 22 is characterized in that, also comprises memory module,
Described memory module is used to store the mapping relations of described retransmission confirmation information and feedback channel, feedback information,
Described acquisition module also is used to read described memory module to obtain the mapping relations of described retransmission confirmation information and feedback channel, feedback information.
24. a user equipment (UE) is characterized in that, comprising:
Receiver module, it is used to receive M the downlink data packet that the base station sends, and produces M retransmission confirmation information corresponding to a described M downlink data packet, and wherein said M is greater than 4;
Determination module, it is used for the mapping relations according to described retransmission confirmation information and feedback channel, feedback information, determines to organize feedback information corresponding to N the feedback channel and the N of a described M retransmission confirmation information;
Sending module, it is used for described N group feedback information is sent to the base station on described N feedback channel of a sub-frame of uplink.
25. UE according to claim 24 is characterized in that, also comprises memory module,
Described memory module is used to store the mapping relations of described retransmission confirmation information and feedback channel, feedback information,
Described determination module also is used to read described memory module to obtain the mapping relations of described retransmission confirmation information and feedback channel, feedback information.
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