CN104079394B - The feedback information relevant with the GSM using carrier aggregation - Google Patents
The feedback information relevant with the GSM using carrier aggregation Download PDFInfo
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Abstract
The present invention relates to a kind of method for being used to encode several feedback information messages in the mobile radio communicaltions system using carrier aggregation, methods described includes：Encode several described feedback information messages by codeword set, each of which feedback information message can be at least the first species or second species.Methods described is characterised by：For at least one feedback information message, at least one code word of at least one code word in the presence of the information corresponding to first species and the information corresponding to the second species, wherein described have ultimate range corresponding to the modulation symbol of one of at least one code word of information of first species and the modulation symbol corresponding to one of at least one code word of information of the second species.The invention further relates to a kind of terminal and radio base station for communication system.
Description
Technical field
It is used to encode several feedbacks in the mobile radio communicaltions system using carrier aggregation the present invention relates to a kind of
The method of informational message.Moreover, it relates to a kind of terminal and radio base station for mobile radio communicaltions system.
Background technology
In advanced (LTE the is advanced) system of Long Term Evolution, multiple component carriers can be respectively in up-link and downlink
Middle polymerization.For example, in order to provide high data rate, user equipment (UE) can be received in multiple downlink component carriers
Launch simultaneously.For a UE, each component carrier is used to launch 1 transmission block (for multiple-input and multiple-output (MIMO) transmitting
It is 2 transmission blocks).If it successfully be detected transmission block, then UE sends confirmation (ACK), and if detection on uplink
It is unsuccessful, then to send NACK (NACK).Can be with the position of value " 1 " to represent ACK, and represent NACK with value " 0 ".Cause
This, it is in the case of carrier aggregation, it is necessary in response to the transmission block launched on different component carriers and more from a UE transmitting
Individual ACK or NACK positions.
Sometimes, component carrier is replaced using the concept of cell, polymerization can equally be directed to cell.In the case of polymerization, use
Family equipment may be configured with multiple serving cells.Cell can provide the communication of up-link and downlink both direction, therefore can
Including up-link and downlink component carrier.Can be assumed that UE has a main services cell (P cells), and if one or
Dry auxiliary serving cell (S cells).Those skilled in the art equally can replace gathering with carrier wave using term " cell "
Close relevant component carrier.
Before transmission block is detected, it is necessary first to detect downlink control channel, it, which contains, receives data channel and solution
Downlink allocation information needed for code transmission block.If control channel is not correctly received by UE, then UE does not know its expection
Any data channel is received, and it does not send any feedback, either ACK or NACK in the uplink.This is referred to as not
Continuous transmitting (DTX).ENB is aware of when to be expected NACK or ACK, and if eNB performs data transmitting, is then examined in DTX
After survey, eNB must originate repeating transmission.In MIMO transmission, a downlink control channel contains for two transmission blocks
Distribution.Therefore, DTX is applied to two transmission blocks simultaneously for MIMO.
In addition to downlink distribution is lost, the ACK/NACK signalings in up-link are also possible to be wrong, such as institute
The ACK of transmitting is received possibly as NACK, or the NACK launched is received possibly as ACK.NACK to ACK mistakes
Hybrid automatic repeat-request (HARQ) buffering collapse may be introduced in the receiver because of the faulty combination of some transmittings, because with
Family equipment (UE) can expectability retransmit, and base station (such as eNB in Long Term Evolution (LTE) communication system) dispatches new bag.ACK
To NACK mistakes because UE is not expected retransmit when unnecessary re-transmission cause system operatio poorly efficient.It is therefore important that provide steady
Strong ACK/NACK signalings.In order to ensure appropriate systematic function, LTE specification lists to be wanted to ACK/NACK error performances
Ask.
Channel assignment is a kind of feasible method for being used to launch multiple confirmation (ACK) and NACK (NACK) positions.Pass through
Sequence through QPSK (QPSK) (or other modulation order symbols) modulation performs transmitting, and passes through sequence and QPSK
The Channel assignment of the form of constellation point carrys out encoder feedback information.Channel assignment is related to the selection of sequence, and can be provided in same frequency
Launch some sequences on source.That is, channel is obtained by the code division multiplex (CDM) of sequence.UE is generally once only at one
Launched on channel.Therefore, because only select and launch a sequence, therefore Channel assignment for a user equipment (UE)
The beneficial single-carrier property of lower peak value average power (PAPR) to keeping UE of stick signal.This feedback principle has been used
In time division duplex (TDD) Long Term Evolution (LTE) version 8, wherein the ACK/NACK from multiple downlink subframes is by list
One in individual uplink sub-frames is launched to notify.For LTE advanced systems, Channel assignment is will also use, but passing on
Used in the case of ACK/NACK from multiple component carriers (i.e. carrier aggregation).This is applied to up to 4 ACK/NACK
Position, and also include FDD (FDD) situation.Each transmission block usually requires an ACK/NACK position, therefore 4 positions can correspond to
In the configuration for respectively thering is MIMO to launch on 2 component carriers.
In order to encode ACK/NACK/DTX information, it is necessary to ACK, NACK and DTX different conditions and channel and QPSK constellations
Mapping between point.These mapping tables exist because of the Channel assignment of the TDD in version 8, but for the load in LTE advanced systems
Ripple polymerization needs new mapping, because ACK/NACK/DTX various combination will be needed to encode, and the availability of channel and reserved
By difference.
Code book is needed come the ACK/NACK launched for carrier aggregation by means of Channel assignment, wherein for ACK/NACK/
DTX each efficient combination, a channel and a constellation point should be distributed, therefore, this scheme needs one and uses carrier aggregation
Mobile radio communicaltions system.
The content of the invention
It is an object of the present invention to propose a kind of solution to prior art problem, or reduce prior art problem.Cause
This, main target is to design a kind of scheme of the feedback information message of the suitable GSM using carrier aggregation.
According to the present invention, by for encoding several feedbacks in the mobile radio communicaltions system using carrier aggregation
The method of informational message realizes the target, and methods described includes：
- several described feedback information messages are encoded by codeword set, each of which feedback information message can be extremely
Few first species or second species, and each code word includes a channel in A channel, and selected from S modulation symbol
A modulation symbol in number.Methods described is characterised by：For at least one feedback information message, exist corresponding to first
At least one code word of at least one code word of the information of species and information corresponding to second species, for described at least one
Individual feedback information message, corresponding to one of at least one code word of information of the first species modulation symbol with it is corresponding
There is ultimate range, and wherein described code in the modulation symbol of one of at least one code word of information of second species
Word includes same channel and different modulating symbol, and wherein at least one feedback information message, in S symbol extremely
Few one is not used for any code word for including the same channel.
Therefore, by means of the method, the scheme designed for the feedback information message in mobile radio communicaltions system.By
It is maximum in having when the information and the symbol of the code word of the information of second species that represent the first species are launched on the same channel
Interval, thereby, it is ensured that the possibility that this symbol is obscured each other is minimized.That is, the information of the first species is sent but is detected as
The possibility of the information of second species is minimized.
The present invention relates to following understanding：The code word tool of the phase information for the symbol launched using Channel assignment and on channel
There is asymmetric detection probability, because that energy is have sent on channel is more simply too much than the phase of detection symbols for detection.Enter one
Step is recognized：By ensuring the mostly undesired feedback information message obscured in detection in terms of its modulation symbol at utmost
Upper separation, above-mentioned characteristic can be utilized in this case.
Therefore, the present invention proposes following viewpoint：Codebook design can influence ACK to NACK and NACK to ACK error probabilities,
Channel and constellation point are distributed into effective ACK/NACK/DTX states so that the error probability of state is minimized, can try really
Protect and represent that the code word of different types of information has largest interval in terms of its corresponding modulation symbol.
The invention further relates to the terminal and radio base station with the method according to the invention with equivalent advantage.
Other advantageous embodiments are disclosed in the dependent claims.
Brief description of the drawings
The example embodiment of the present invention will be described by means of accompanying drawing now, wherein
Fig. 1 illustrates the QPSK constellations through Gray code,
Fig. 2 illustrates the probability [NACK- of table 1>ACK] (having markd dotted line) and probability [ACK->NACK/DTX] (have
The solid line of mark) curve map,
Fig. 3 illustrates the probability [NACK- of table 3>ACK] (having markd dotted line) and probability [ACK->NACK/DTX] (have
The solid line of mark) curve map,
Fig. 4 illustrates radio base station and terminal.
Embodiment
Consider one group of A channel (nPUCCH..., n (0)PUCCH) and 2 (A-1)mModulation is (for QPSK, m=2), wherein from A
1 channel is selected in individual channel, and launches 2 on this channelmOne of individual modulation symbol.Like this, it is encoded into more
Up to A2mThe information of individual state.This signaling method is referred to as Channel assignment.In LTE, channel includes sequence, and QPSK symbols
Modulate the sequence.QPSK symbols are assumed in describing below, but without loss of generality.
Code word can be defined as to the position (n of channel indexes and QPSK symbolsPUCCH(k),b(0),...,b(m-1))(k∈{0,
1 ..., A-1, b (i) ∈ { 0,1 }) cascade.Therefore, code word element can have different alphabets.Each effectively code word represents
One information state.Due to passing on the first element n by selecting channelPUCCH, and other element b (0) ..., b (m-1) (k)
Passed on by modulation symbol, therefore detection performance is different between the element in code word.First element is related to the use of channel, and can lead to
Cross energy measuring or detected by correlator, and modulation symbol must be by the phase-detection of the signal received.Generally, energy measuring
It is more more reliable than symbol detection.Therefore, the design of code book must account for the degree of reliability difference of code word element.One consequence is
Error probability (for example, NACK to ACK or ACK to NACK mistakes) is mainly due to the error detection to modulation symbol, and will take
Certainly a certain information is encoded in distributing which code word.Therefore, it is necessary to modulation symbol and channel are cautiously distributed to reduce wrong thing
Part.
The code book that size is N includes the set of N number of information state to the mapping of code word.Generally, this packet is containing (but unlimited
In) ACK, NACK, NACK/DTX or DTX one or several entities.United state NACK/DTX generally implies that eNB will be performed
Retransmit.If N≤A2m, then the number of used code word is not more than the sum of available codeword, therefore receiver can be clear and definite
Ground determines each coding information state.Each information state can be further by one or several fields (such as herein by HARQ-
ACK (i) is represented) composition, feedback information of each of which field expression for given transmission block.This field is also referred to as feedback information
Message, the two terms are used interchangeably.The state of this field can be at least any in ACK, NACK, NACK/DTX or DTX
Person.If two carrier wave (or cell) polymerizations, then HARQ-ACK (0) can represent the feedback information message for component carrier 0,
And HARQ-ACK (1) can represent component carrier 1.Informational message can discharge control with the transmitting of dynamic dispatching and with semi-persistent scheduling
The associated data transmitting of channel processed is associated.
In LTE, if launched using MIMO, then send 2 transmission blocks, and each transmission block needs the anti-of their own
Feedforward information.Therefore, if polymerization with MIMO 2 carrier waves, then need have 4 fields (HARQ-ACK (0) arrives HARQ-
ACK (3)) code book.The code book with 4 fields can also be used in the polymerization of 4 carrier waves without MIMO.Similarly,
Can be used in the polymerization of 3 carrier waves without MIMO or one of carrier wave are using the polymerization of MIMO 2 carrier waves has 3
The code book of individual field.
In order that error probability is minimized, and because modulation symbol of the known error essentially from mistake detects, the present invention
A kind of construction comprising code book, wherein at least one HARQ-ACK fields (feedback information message), representing different information
And share same channel nPUCCHCode word between, the modulation symbol of given HARQ-ACK fields separates as far as possible.Assuming that letter
Road is correctly detected, then above-mentioned movement is minimized NACK to ACK and NACK to ACK probability.
This illustrates in the following example, wherein consider according to QPSKs of the Fig. 1 through Gray code and following code book, wherein
When suitable, DTX is mapped to NACK.When carrying out this mapping, it is contemplated that represent to be used for the MIMO on the first component carrier and send out
The HARQ-ACK (0) and HARQ-ACK (1) for the feedback information message penetrated, and represent that the feedback information on second component carrier wave disappears
The HARQ-ACK (2) of breath.The number of code word is N=8, and uses 3 channels.
Table 1. is used for the example code book with the HARQ-ACK of 3 bit multiplexs.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1)、HARQ-ACK(2) | nPUCCH | b(0),b(1) |
| 1 | ACK、ACK、ACK | nPUCCH(2) | 1,1 |
| 2 | ACK、ACK、NACK/DTX | nPUCCH(0) | 1,1 |
| 3 | ACK、NACK、ACK | nPUCCH(0) | 1,0 |
| 4 | ACK、NACK、NACK/DTX | nPUCCH(1) | 1,0 |
| 5 | NACK、ACK、ACK | nPUCCH(1) | 0,1 |
| 6 | NACK、ACK、NACK/DTX | nPUCCH(0) | 0,1 |
| 7 | NACK/DTX、NACK/DTX、ACK | nPUCCH(2) | 0,1 |
| 8 | NACK/DTX、NACK/DTX、NACK/DTX | nPUCCH(2) | 0,0 |
| 9 | DTX、DTX、DTX | N/A | N/A |
It can be assumed that the channel used in code book will be launched on an antenna port.If UE is equipped with multiple antenna ends
Mouthful, then the symbol can be summarized as channel n(p) PUCCH(k) it is used for antenna port p.The feature of the present invention is not limited to single day
Line end mouth, but can summarize for those skilled in the art so that the feature is applied to one or several antenna ports
Any one of.For example, it is contemplated that having a code book per antenna port, each code book has the feature of the present invention.
In order to further appreciate that codebook construction, it is assumed that NACK and NACK/DTX are grouped together, can be according to following each
The coded information of HARQ-ACK fields and further configure code word.
The packet of the code word of code book of the table 2. in table 1.
The method for encoding some feedback information messages in mobile radio communicaltions system is put up with now to come further
The possibility embodiment of the present invention is described.This system uses above-mentioned carrier aggregation.It is expansible and change methods described, paragraph below
In will be described in detail.The citation form of methods described disappears including encoding several described feedback informations by codeword set
Breath, each of which feedback information message can be at least the first species or second species.As mentioned, at least two is different types of
The positive or negative that information may correspond to previously transmitted data confirms (ACK/NACK/DTX).Each code word includes being selected from A
One channel of individual channel, and selected from S modulation symbol modulation symbol.Now, code word is configured according to the present invention
Code book so that at least one feedback information message, exist corresponding to the information of the first species at least one code word and
It is described to correspond to corresponding at least one code word of the information of second species, and at least one feedback information message
The modulation symbol of one of at least one code word of the information of first species and the information corresponding to second species
The modulation symbol of one of at least one code word has ultimate range.That is, in planisphere, the two code words are in the drawings
Separate as much as possible.For example, in Fig. 1, symbol 10 and 01 has ultimate range, and equally, symbol 11 and 00 is also most
Separated in big degree.In addition, according to the method, code word includes same channel and different modulation symbols.Moreover, for it is described extremely
At least one of a few feedback information message, S symbol are not used for any code word for including the same channel.
In this method, ultimate range can be the Euclidean distance in signal space, such as previously combined Fig. 1 and demonstrated.
Term " ultimate range " is meant in the context of the present invention：Select two modulation symbols so that for available symbols collection
Close, the probability that another one is had falsely detected when sending one of described modulation symbol is minimized.
According to one embodiment of the method for the invention, at least one feedback information message, exist and correspond to
The only one code word of the only one code word of the information of first species and information corresponding to second species.This embodiment is described
For following instance.
In this first embodiment, the present invention is applied to situations below：For HARQ-ACK fields, a code word is used for
Encode the information (such as NACK and NACK/DTX) of the first species, by a code word be used for encode second species information (such as
ACK), described two code words include same channel, and the channel is used without other code words in this HARQ-ACK field.
Consider the HARQ-ACK (0) in table 2, and assume to transmit code word (nPUCCH(1),1,0).This code word represents to be directed to
HARQ-ACK (0) NACK or NACK/DTX.Different information (i.e. ACK) are represented for the HARQ-ACK (0) including same channel
Code word be (nPUCCH(1),1,0).In HARQ-ACK (0) channel n is used without other code wordsPUCCH(1).If correctly detect
To channel, then NACK to ACK mistakes occur (if detecting (nPUCCH(1),1,0)).It is main according to the present invention, error event
Be attributed to the detection of modulation symbol, by by the modulation symbol for the two code words be chosen so as to its distance increase to it is maximum come
It is minimized NACK to ACK and ACK to NACK error probabilities.This can see in Fig. 1, wherein corresponding to (b (0), b (1))
The constellation point of=(0,1) and (b (0), b (1))=(1,0) is to the full extent away from each other.Can be it is further seen that dividing in table 2
Same principle with modulation symbol, wherein respectively in each field (feedback information message), for for containing nPUCCH(1) institute
The HARQ-ACK (1) and HARQ-ACK (2) for having code word maintain ultimate range.
In second embodiment of the method according to the invention, at least one feedback information message, exist correspondingly
Two code words of a code word in the information of the first species and the information corresponding to second species.This reality of explanation exemplified below
Apply example.
In this second embodiment, the present invention is applied to situations below：For HARQ-ACK fields, two code words are used for
Encode the information (such as NACK and NACK/DTX) of the first species, by a code word be used for encode second species information (such as
ACK), all code words include same channel, and the channel is used without other code words in this HARQ-ACK field.
For example, in table 2, for HARQ-ACK (0), code word (nPUCCH(2), 0,1) and (nPUCCH(2), 0,0) table
Show NACK or NACK/DTX.The code word for representing different information (i.e. ACK) for the HARQ-ACK (0) including same channel is
(nPUCCH(2),1,1).If channel is correctly detected, then NACK to ACK mistakes occur (if detecting (nPUCCH(2),
1,1)).According to the present invention, existed by the distance that the modulation symbol for these three code words is chosen so as to the modulation symbol
Represent the code word of different information at least increases to maximum be minimized this error probability between the two.For example, code word
(nPUCCH(2), 0,0) with code word (nPUCCH(2), 1,1) ultimate range is separated.This can see in Fig. 1, wherein corresponding to (b
(0), b (1))=(1,1) and (b (0), b (1))=(0,0) constellation point to the full extent away from each other.It can enter in table 2
One step sees the same principle of distribution modulation symbol, wherein any feelings for being used for its code word several times for same channel be present
Condition, it is that HARQ-ACK (1) and HARQ-ACK (2) maintains ultimate range.For NACK or NACK/DTX, this is directed to HARQ-ACK
(0), HARQ-ACK (1) and HARQ-ACK (2) includes 2,2,0 respectively.For ACK, this is directed to HARQ-ACK (0), HARQ-ACK
(1) and HARQ-ACK (2) includes 0,0,2 respectively.
In the another 3rd embodiment of the method according to the invention, at least one feedback information message, exist pair
Should be in more than one code word of the information of the first species, and more than one code word of the information corresponding to second species, and
One and the number of codewords of information of second species be identical.
In this 3rd embodiment, the present invention is applied to situations below：For HARQ-ACK fields, by K>1 code word is used
In encode the first species information (such as NACK and NACK/DTX), by K code word for encode second species information (such as
ACK), all code words include same channel, include the channel without other code words in this HARQ-ACK field.
According to the present invention, by the distance that the modulation symbol for this 2K code word is chosen so as to the modulation symbol
Representing at least one of the code word of information of at least one of code word of information of the first species with representing second species
Between increase to maximum be minimized error probability.
For any version of the method according to the invention, the information of the first species can be NACK (NACK),
NACK (NACK)/discontinuous transmitting (DTX), any combinations or single status of discontinuous transmitting (DTX), and second species
Information include validating that (ACK).This information for being not precluded from first and second species can be the information of a certain other species, or very
To a greater variety of information, such as the information of the third class may be present.
Any one of version for the method according to the invention, at least one feedback information message can with it is how defeated
It is relevant to enter multi output (MIMO) feedback.
In addition, at least one feedback information message of the method according to the invention can be with hybrid automatic repeat-request (HARQ)
It is relevant.
In addition, in any version of the method according to the invention, each of A channel may correspond to for example
The sequences such as the quasi orthogonal sequences used in code division multiplex.This sequence can have two-dimensional map, such as in time and frequency
On mapping.However, other communication channels are not foreclosed.
Can be directed in feedback information message at least both the method according to the invention used with same channel distribution.It is another
Possibility is same channel distribution be present for all feedback information messages.
Because each code word includes a channel and multiple symbols, therefore the multiple feedback information messages of code word codified.
The method of the present invention manages the characteristic of at least one feedback information message so that feedback information to the first species and
The feedback information of second species, realize most possible the advantages of correctly detecting the feedback information message.It is however, at least one anti-
The characteristic of feedforward information message is applicable to all feedback information messages, so as to realize this maximum possible for all such message
Property.So, whole mechanism of information feedback is sure is optimized.
Can be according to the method according to the present invention come further encoder feedback informational message so that on feedback information message,
In the presence of a pattern, the pattern includes：
First number code word, it includes same channel and information-related with the first species；Second number code word, its
Including the same channel and information-related with second species,
And wherein described pattern is applicable all feedback information messages.If that is, (such as) for a feedback
Informational message, exist including same channel and relevant with NACK two code words (that is, the first number is two), and for described same
One feedback information message, exist including the same channel and relevant with ACK code word (that is, the second number is one).Connect
, this pattern of 2+1 code word is repeated for all other feedback information message.However, for other feedback information messages
The channel of the code word encoded can be different between feedback information message, but it is identical in same feedback information message.
Consider (such as) table 2：(feedback information message) is arranged for the NACK/ACK for HARQ-ACK (0), is existed
Two include same channel and the code word relevant with the information (NACK, NACK/DTX) of the first species：(nPUCCH(2), 0,1) and
(nPUCCH(2),0,0).In addition, for same feedback information message, having one includes the same channel (nPUCCH(2)) and
The relevant code word with the information (ACK) of second species：(nPUCCH(2),1,1).Now, other two feedback information messages are considered,
This same pattern can be recognized.For HARQ-ACK (1)：Two code words are used for NACK, NACK/DTX：(nPUCCH(2), 0,1) and
(nPUCCH(2), 0,0), a code word is used for ACK：(nPUCCH(2),1,1).For HARQ-ACK (2)：Two code words are used for
NACK、NACK/DTX：(nPUCCH(0), 1,1) and (nPUCCH(0), 0,1), a code word is used for ACK：(nPUCCH(0),1,0).Cause
This, same pattern is repeated for all three feedback information messages.Pay attention to, channel only must in same feedback information message phase
Together, need not be identical between multiple feedback information messages.For the first two feedback information message of this example, channel nPUCCH
(2), and for last feedback information message, channel nPUCCH(0).Therefore, this is the 2+1 schema instances from table 2.Together
Sample, 1+1 and 1+2 schema instances can be shown as being present in table 2.Equally, for example, in table 14, all feedback information messages
On 1+1 patterns be present.
The number of the feedback information message of the method according to the invention can (such as) any one of for following numeral：2、3
Or 4.If can be used for coded message if enough modulation symbols, more message also may be present.
In the method according to the invention, the number S of modulation symbol can (such as) be four.Use this modulation of four symbols
An example be the QPSK (QPSK) through Gray code.However, it is not present in methods described to using other tune
The inherent limitations of system, therefore the number of modulation symbol can not be four.For example, 8 phase shifts using eight symbols can be used
Keying.
The method according to the invention is also not necessarily limited to any specific mobile radio communicaltions system, can be used to make by methods described
With in any mobile radio communicaltions system (such as Long Term Evolution (LTE) advanced system) of carrier aggregation.
A channel in the method according to the invention can by any one of the following and for (such as) specific user
Equipment (UE) is reserved：The combination of implicit reservation, explicit signaling or implicit reservation and explicit signaling.Implicit reservation will imply that user
Equipment observes the behavior of wireless base station, and calculates which channel used based on pre-defined rule.For example, based on wireless base station
Decision sends a certain other message on which channel, and described information can be used to determine which channel should be used for according to this in UE
The code word of invention.For example, for launch associated downlink control channel running time-frequency resource can implicitly with uniquely
Channel is relevant.Explicit signaling will be related to explicit message to indicate which channel used.For example, when implicit reservation can not carry
Enough implicit transmission are not present for the different channels of sufficient amount, or in communication between UE and base station on which will be used believe
During the average information in road, implicitly the combination with explicit reservation will be useful.In said case, can be supplemented with explicit signaling surplus
Remaining information.
If necessary to further flexibility, the method according to the invention may include by higher level signaling to configure
State feedback information message.Like this, feedback information message configuration can according to circumstances change, while still keep according to the present invention
And the characteristic specified.For example, can be according to the number for the serving cell being configured and the downlink of each serving cell
Emission mode and the number for configuring feedback information message.
It is noted that for the method according to the invention, the codeword set may make up the subset of larger codeword set.That is,
Larger code book may be present, it need not have the characteristic of the codeword set according to the present invention, but the subset of code words that larger code book includes
Really there is the characteristic.This of the larger code book may be taken out by the subset of code words using only the larger code book
Subset.
It is also possible to prediction：The method according to the invention can with reference to (such as) multiple antenna ports of user equipment and make
With.If that is, by codeword coding feedback information message number it is said that form the first code book, and exist with the first code book
At least one extra code book of characteristic, then each of the first code book and at least one extra code book can be assigned to corresponding
Antenna port.This also touch upon above.
It must be stressed that all changes form and embodiment of the method according to the invention described above can groups
Close, as long as in the absence of the intrinsic contradictions combined for this.For example, the basic skills of the present invention is combined so that modulation
It is entirely possible that the number of symbol corresponds to a sequence for each of four and channel, therefore this forms efficient combination.Phase
Instead, the basic skills of the present invention is combined so that：
- at least one feedback information message, the only one code word corresponding to the information of the first species be present,
And the only one code word of the information corresponding to second species,
Cause simultaneously：
- at least one feedback information message, a code word of the information corresponding to the first species be present, with
And two code words of the information corresponding to second species, this combination is invalid, since it is considered that multiple code words are including same
Channel, above-mentioned two are contradiction.
All efficient combinations are regarded as disclosing above.
For the performance for the explanation present invention that demonstrates, Fig. 2 contains the Numerical evaluation of the detection performance of the code book using table 1.Table 3
An example of the code book of the distribution of the modulation symbol according to the present invention is not applied in displaying.Fig. 3 is shown, uses this exemplary code book
Shi Xingneng is very different.
Table 3. is used for the example code book with the HARQ-ACK of 3 bit multiplexeds.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1)、HARQ-ACK(2) | nPUCCH | b(0),b(1) |
| 1 | ACK、ACK、ACK | nPUCCH(2) | 1,1 |
| 2 | ACK、ACK、NACK/DTX | nPUCCH(0) | 1,1 |
| 3 | ACK、NACK、ACK | nPUCCH(0) | 1,0 |
| 4 | ACK、NACK、NACK/DTX | nPUCCH(1) | 1,1 |
| 5 | NACK、ACK、ACK | nPUCCH(1) | 0,1 |
| 6 | NACK、ACK、NACK/DTX | nPUCCH(0) | 0,0 |
| 7 | NACK/DTX、NACK/DTX、ACK | nPUCCH(2) | 0,1 |
| 8 | NACK/DTX、NACK/DTX、NACK/DTX | nPUCCH(2) | 1,0 |
| 9 | DTX、DTX、DTX | N/A | N/A |
In table 2, for every HARQ-ACK fields, a channel is used in two code words, and in two code words
Use two channels.For example, for HARQ-ACK (0), when information is NACK or NACK/DTX, nPUCCH(2) it is used for two
In individual code word, and nPUCCHAnd n (0)PUCCH(1) respectively in a code word.For HARQ-ACK (1), when information is ACK,
nPUCCH(0) it is used in two code words, and nPUCCHAnd n (1)PUCCH(2) respectively in a code word.The use of channel can be described as
Channel distribution.Herein, channel distribution illustrates the number for including the code word of a certain channel, but does not differentiate using which channel.Therefore,
It is identical that the distribution of several used channels, which is directed to any one of HARQ-ACK fields in table 2,.The present invention is unlimited
Contained channel or the specific distribution of distribution in table 2.One example of this situation is following code book.
Table 4. is used for the example code book with the HARQ-ACK of 3 bit multiplexeds.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1)、HARQ-ACK(2) | nPUCCH | b(0),b(1) |
| 1 | ACK、ACK、ACK | nPUCCH(1) | 1,1 |
| 2 | ACK、ACK、NACK/DTX | nPUCCH(0) | 1,1 |
| 3 | ACK、NACK、ACK | nPUCCH(2) | 0,1 |
| 4 | ACK、NACK、NACK/DTX | nPUCCH(0) | 1,0 |
| 5 | NACK、ACK、ACK | nPUCCH(1) | 0,1 |
| 6 | NACK、ACK、NACK/DTX | nPUCCH(0) | 0,1 |
| 7 | NACK/DTX、NACK/DTX、ACK | nPUCCH(2) | 0,0 |
| 8 | NACK/DTX、NACK/DTX、NACK/DTX | nPUCCH(0) | 0,0 |
| 9 | DTX、DTX、DTX | N/A | N/A |
The code word in this code book can be further configured as follows according to the coded information for every HARQ-ACK fields.
The packet of the code word of code book of the table 5. in table 1.
From table 5 it can be seen that, HARQ-ACK (0) for NACK, NACK/DTX have with for ACK identical channel distributions.
HARQ-ACK (1) has with dividing for ACK and with HARQ-ACK (2) for ACK identicals channel for NACK, NACK/DTX
Cloth.
Table 5 also shows that 3rd embodiment is applicable.For example, HARQ-ACK (1) uses (nPUCCH(0), 1,0) and (nPUCCH
(0), 0,0) encode NACK or NACK/DTX, and use (nPUCCH(0), 1,1) and (nPUCCH(0), 0,1) ACK is encoded.Code
Word (nPUCCH(0), 1,0) it is in away from (nPUCCH(0), 0,1) maximum distance apart, and code word (nPUCCH(0), 0,0) it is in away from (nPUCCH
(0), 1,1) maximum distance apart.
Table 5 also shows that first embodiment does not apply to, because for HARQ-ACK (0), (nPUCCH(1), 0,1) be not at away from
(nPUCCH(1), 1,1) maximum distance apart.
The present invention is applied to one of three embodiments or any combinations of some persons.
The present invention is applied at least one HARQ-ACK fields in code book.
The present invention is applied to the code book of the number of HARQ-ACK fields or the number of channel not equal to 3.One embodiment is
Code book with 2 fields and 2 channels, such as：
Table 6. is used for the example code book with the HARQ-ACK of 2 bit multiplexeds.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1) | nPUCCH | b(0),b(1) |
| 1 | ACK、ACK | nPUCCH(1) | 1,0 |
| 2 | ACK、NACK/DTX | nPUCCH(0) | 1,1 |
| 3 | NACK、ACK | nPUCCH(1) | 0,1 |
| 4 | NACK、NACK/DTX | nPUCCH(0) | 0,0 |
| 5 | DTX、DTX | N/A | N/A |
Another embodiment be directed to by 4 HARQ-ACK fields and 4 channels or usual P HARQ-ACK fields and P' ≠
The code book of P channel composition.
Alternative
As an alternative, method of the invention can be not used for any code word by omitting at least one of S symbol
Requirement and loosen requirement.The method for loosening requirement is described as follows：
Method for encoding several feedback information messages in the mobile radio communicaltions system using carrier aggregation,
Methods described includes：
- several described feedback information messages are encoded by codeword set, each of which feedback information message can be extremely
Few first species or second species, and each code word includes a channel in A channel, and selected from S modulation symbol
A modulation symbol in number.Methods described is characterised by：For at least one feedback information message, exist corresponding to first
At least one code word of at least one code word of the information of species and information corresponding to second species, and for it is described at least
The modulation symbol of one of one feedback information message, at least one code word of the information for corresponding to the first species and
The modulation symbol of one of at least one code word of the information corresponding to second species has ultimate range, and wherein institute
Stating code word includes same channel and different modulating symbol.
It is contrasted with previously described the method according to the invention, this method for loosening requirement will also include a letter
All modulation symbols in road are used to the embodiment of code word.For example, four modulation symbols and further wherein described are used
Both in symbol are used for the information of the first species and other two symbol is used for the systems of information of second species and thus sent
It is required that method includes.
Therefore, this transmission requires that method includes large range of possible code book, at the same still provide make it is as described earlier
The probability that feedback information message is correctly received increases to biggest advantage.
This relaxation method can combine with all changes form of original described method of the invention above, to form this
The new framework of the embodiment of relaxation method.
According to the terminal of the present invention
The present invention further comprises the terminal 320 for the mobile radio communicaltions system 300 using carrier aggregation, described
Terminal is suitable to send several feedback information messages, wherein the terminal is suitable to encode by codeword set, described several are anti-
Feedforward information message, each of which feedback information message can be at least the first species or second species, and each code word includes being selected from A
A channel in individual channel and a modulation symbol in S modulation symbol.The terminal is characterised by that it can
To cause：For at least one feedback information message, exist corresponding at least one code word of the information of the first species and right
Should be at least one code word of the information of second species, corresponding to one at least one code word of the information of the first species
The modulation symbol of person and the modulation symbol of one of at least one code word of information corresponding to second species are directed to institute
Stating at least one feedback information message has ultimate range, and wherein described code word includes same channel and different modulating symbol,
And wherein at least one feedback information message, at least one of S symbol is not used for including the same channel
Any code word.
The terminal forms the entity for the part for terminal for being adapted for carrying out the method for the present invention.For example, it is described
Terminal is suitable to send feedback information message, and configures this feedback information message so that it shows the characteristic of the present invention.The present invention
Terminal may be adapted to using the present invention method any specific embodiment relevant with terminal.Fig. 4 describes terminal 320.
According to the base station of the present invention
The present invention further comprises the radio base station for the mobile radio communicaltions system 300 using carrier aggregation
310, the base station is suitable to receive several feedback information messages for organizing codeword coding by (first), and each of which feedback information disappears
Breath can be at least the first species or second species, and each code word is including a channel in A channel and selected from S
A modulation symbol in modulation symbol.The base station is characterised by that it can cause：Disappear at least one feedback information
Breath, at least one code of at least one code word corresponding to the information of the first species and the information corresponding to second species be present
Word, corresponding to one of at least one code word of information of the first species modulation symbol with corresponding to second species
The modulation symbol of one of at least one code word of information has maximum at least one feedback information message
Distance, and wherein described code word includes same channel and different modulating symbol, and wherein at least one feedback information
At least one of message, S symbol are not used for any code word for including the same channel.
The radio base station forms the entity for the part for radio base station for being adapted for carrying out the method for the present invention.Lift
For example, radio base station is suitable to connect by decoding such feedback information message of the code word from the characteristic with the present invention
Receive feedback information message.The radio base station of the present invention may be adapted to appoint using the relevant with radio base station of method of the present invention
What specific embodiment.Fig. 4 describes radio base station 310.
The size N of code book determines the amount of communicable information.Each information state corresponds to a code word, and in receiver
In, the most probable code word in code book should be detected.For each detected code word, therefore N-1 false candidates in code book be present
Code word.Make the probability of detection mistake therefore increase with the size of code book.
It can be further adapted for receiving the feedback information message by second group of codeword coding according to the radio base station of the present invention,
And after obtaining on the extraneous information of communication system, radio base station may be adapted to second group by using dependence extraneous information
The subset of code word receives by these feedback information messages of second group of codeword coding, and wherein subset of code words has and (first)
Group code word identical characteristic.
Therefore, in one embodiment, there is receiver transmitter its available information state can be used (that is, in code book
Entry) extraneous information.By only performing the detection to available information state, the number of candidate codewords is reduced, this to detect
Probability improves.Receiver can therefore codebook size reduce in the case of perform detection.
In addition, when using extraneous information, radio base station can be adapted to so that extraneous information, which is base station, prevents scheduling
On the data transmitting of at least one carrier wave of mobile terminal, and wherein subset of code words includes those codes from second group of code word
Word, it includes NACK and discontinuous transmitting (NACK/DTX) or DTX at least one carrier wave.
Therefore, in one embodiment, including transmitter, above, scheduling should report that its up-link is anti-to extraneous information
Present the carrier wave of the data of (that is, ACK, NACK, DTX).For example, if radio base station (for example, eNB in LTE) only exists
First carrier raises degrees of data, then its by only to the state perform detection in the code book including the DTX on the second carrier wave because
ENB knows that any ACK or NACK relevant with the second carrier wave fed back is wrong.For example, in table 9, it is assumed that
HARQ-ACK (0) and HARQ-ACK (1) is relevant with first carrier (for example, primary component carrier or non-primary cell), and HARQ-
ACK (2) and HARQ-ACK (3) is relevant with the second carrier wave (for example, secondary component carrier or secondary cell).If e nodes B only exists
Dispatched on first carrier, it will be only to entry 4,8,10 and 13 perform detections.
These entries will equally be considered as sub-codebook as configured in table 7, and it is only included corresponding to first carrier
HARQ-ACK fields.
Example sub-codebook of the table 7. from table 9.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1) | nPUCCH | QPSK |
| 1(4) | ACK、ACK | nPUCCH(0) | 1,1 |
| 2(8) | ACK、NACK | nPUCCH(1) | 1,0 |
| 3(13) | NACK、ACK | nPUCCH(1) | 0,1 |
| 4(10) | NACK/DTX、NACK/DTX | nPUCCH(0) | 0,0 |
| 5 | DTX、DTX | N/A | N/A |
It is assumed that be grouped together in NACK and NACK/DTX such as table 8 below, the code word in this code book can further as follows according to
The coded information of every HARQ-ACK fields and configure.
The packet of the code word of code book of the table 8. in table 7.
In another embodiment, sub-codebook includes constellation point and be in the code word of maximum distance apart because code word use it is same
Channel and the information that the first class or second species are represented for given HARQ-ACK fields.
For example, can be seen from table 8：The standard for meeting to make the distance of modulation symbol increase to maximum according to the sub-codebook of table 7
Then.
Table 9. is used for the example code book with the HARQ-ACK of 4 bit multiplexeds.
Another example with the HARQ-ACK of 4 bit multiplexeds code book is provided in table 10.
Table 10. is used for the example code book with the HARQ-ACK of 4 bit multiplexeds.
Similar as above, the sub-codebook will be such as table 11.
Example sub-codebook of the table 11. from table 10.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1) | nPUCCH | QPSK |
| 1(4) | ACK、ACK | nPUCCH(1) | 0,0 |
| 2(8) | ACK、NACK | nPUCCH(0) | 1,0 |
| 3(13) | NACK、ACK | nPUCCH(0) | 0,1 |
| 4(10) | NACK/DTX、NACK/DTX | nPUCCH(0) | 0,0 |
| 5 | DTX、DTX | N/A | N/A |
It is assumed that be grouped together in NACK and NACK/DTX such as table 12 below, the code word in this code book can further as follows according to
The coded information of every HARQ-ACK fields and configure.
The packet of the code word of code book of the table 12. in table 11.
It can be observed from table 12, second embodiment (such as) it is applied to HARQ-ACK (0), (nPUCCH(0), 0,1) it is in
Away from (nPUCCH(0), 1,0) maximum distance apart.
Another alternate example
As another example of the HARQ-ACK with 3 bit multiplexeds, following code book is provided.
Table 13. is used for the example code book with 3 position HARQ-ACK multiplexings.
| Entry number | HARQ-ACK(0)、HARQ-ACK(1)、HARQ-ACK(2) | nPUCCH | b(0),b(1) |
| 1 | ACK、ACK、ACK | nPUCCH(1) | 1,1 |
| 2 | ACK、ACK、NACK/DTX | nPUCCH(1) | 0,0 |
| 3 | ACK、NACK、ACK | nPUCCH(1) | 1,0 |
| 4 | ACK、NACK、NACK/DTX | nPUCCH(0) | 1,0 |
| 5 | NACK、ACK、ACK | nPUCCH(1) | 0,1 |
| 6 | NACK、ACK、NACK/DTX | nPUCCH(0) | 0,1 |
| 7 | NACK/DTX、NACK/DTX、ACK | nPUCCH(2) | 1,1 |
| 8 | NACK/DTX、NACK/DTX、NACK/DTX | nPUCCH(2) | 0,0 |
| 9 | DTX、DTX、DTX | N/A | N/A |
It is assumed that NACK is grouped together with NACK/DTX, the code word in this code book can be further as follows according to every HARQ-
The coded information of ACK fields and configure.
The sequence of the code word of code book of the table 14. in table 13.
In this example, channel distribution is different for NACK, NACK/DTX code word and ACK code words.For example, it is right
In any HARQ-ACK fields for NACK or NACK/DTX, 2 code words include 1 channel, and 2 code words include 2 not
Cochannel.However, for any HARQ-ACK fields for ACK, 3 code words include 1 channel, and 1 code word includes 1
Channel.By checking table 14, it is seen that for every HARQ-ACK fields, a code word be present for NACK, NACK/DTX, at it
In away from a code word maximum distance apart for ACK.Therefore, even if channel distribution is different for different types of information,
First embodiment can be used.
Using and alternative solution
The present invention is applied to the system with multiple carrier waves, and it signals control information in the uplink.
Claims (18)
- A kind of 1. side for being used to encode several feedback information messages in the mobile radio communicaltions system using carrier aggregation Method, methods described include：Encode several described feedback information messages by codeword set, each of which feedback information message be the first species or Second species, and each code word includes a channel in A channel, and a tune in S modulation symbol Symbol processed, methods described are characterised by：For at least one feedback information message, exist corresponding to the anti-of first species At least one code word of at least one code word of feedforward information message and feedback information message corresponding to the second species is right In at least one feedback information message, corresponding at least one code word of the feedback information message of first species In first code word modulation symbol with corresponding to the second species feedback information message at least one code The modulation symbol of second code word in word has ultimate range, and wherein described first and second code word includes same channel And different modulating symbol, and wherein at least one of at least one feedback information message, the S modulation symbol It is not used for any code word for including the same channel.
- 2. according to the method for claim 1, wherein the ultimate range is the Euclidean distance in signal space.
- 3. according to the method for claim 1, exist wherein at least one feedback information message corresponding to described The only one code word of the feedback information message of first species, and only one of feedback information message corresponding to the second species Individual code word.
- 4. according to the method for claim 1, wherein at least one feedback information message, exist corresponding to first One code word of the feedback information message of species, and two code words of the feedback information message corresponding to second species.
- 5. according to the method for claim 1, wherein the feedback information message of the first species is NACK (NACK), negative Confirm (NACK)/discontinuous transmitting (DTX), any combinations or single status of discontinuous transmitting (DTX), and second species is anti- Feedforward information message includes validating that (ACK).
- 6. according to the method for claim 1, wherein at least one feedback information message and multiple-input and multiple-output MIMO Feed back relevant.
- 7. according to the method for claim 1, wherein at least one feedback information message and hybrid automatic repeat-request HARQ is relevant.
- 8. according to the method for claim 1, wherein each in the A channel corresponds to a sequence.
- 9. according to the method for claim 1, wherein both at least be present in the feedback information message, with same channel Distribution.
- 10. according to the method for claim 1, wherein the number of feedback information message is 2 or 3.
- 11. according to the method for claim 1, the wherein number S=4 of modulation symbol.
- 12. according to the method for claim 11, wherein the QPSK QPSK being modulated to through Gray code.
- 13. according to the method for claim 1, wherein the mobile radio communicaltions system is the advanced systems of Long Term Evolution LTE System.
- 14. according to the method for claim 1, wherein the number of the feedback information message is configured by high-level signaling.
- 15. according to the method for claim 1, wherein the codeword set forms the subset of a larger codeword set.
- 16. the method according to any claim in claim 1 to 15, wherein several are anti-as described in codeword coding Feedforward information message forms the first code book, and at least one extra code book of the characteristic with first code book wherein be present, its Described in each of the first code book and described at least one extra code book be assigned to corresponding antenna port.
- 17. a kind of terminal for being used for the mobile radio communicaltions system using carrier aggregation, the terminal are fitted comprising sending module In sending several feedback information messages, if wherein the terminal is described suitable for being encoded by codeword set comprising coding module Dry feedback information message, each of which feedback information message is at least the first species or second species, and each code word includes A channel in A channel and a modulation symbol in S modulation symbol, the terminal are characterised by Its is adapted to cause：For at least one feedback information message, the feedback information message corresponding to first species be present At least one code word and feedback information message corresponding to the second species at least one code word, for it is described at least One feedback information message, corresponding to one at least one code word of the feedback information message of first species The modulation symbol of one code word and one at least one code word corresponding to the feedback information message of the second species The modulation symbol of second code word has ultimate range, and wherein described first and second code word includes same channel and different modulating At least one of symbol, and wherein at least one feedback information message, S modulation symbol are not used for including described Any code word of same channel.
- 18. a kind of radio base station for being used for the mobile radio communicaltions system using carrier aggregation, the base station, which includes, to be received Module is suitable to receive several feedback information messages by one group of codeword coding, and each of which feedback information message is at least first Species or second species, and each code word includes a channel in A channel and one in S modulation symbol Individual modulation symbol, the radio base station are characterised by that its is adapted to cause：For at least one feedback information message, deposit At least one code word in the feedback information message corresponding to first species and the feedback corresponding to the second species At least one code word of informational message, at least one feedback information message, corresponding to the feedback of first species The modulation symbol of first code word at least one code word of informational message is with corresponding to the anti-of the second species The modulation symbol of second code word at least one code word of feedforward information message has ultimate range, and wherein described First and second code words include same channel and different modulating symbol, and wherein at least one feedback information message, S At least one of individual modulation symbol is not used for any code word for including the same channel.
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