CN101594211B - Method for sending correct/wrong response message in multicarrier system with big bandwidth - Google Patents
Method for sending correct/wrong response message in multicarrier system with big bandwidth Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
- H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
Abstract
The invention discloses a method for sending a correct/wrong response message, which is suitable for a correct/wrong response of a terminal in a multicarrier system with big bandwidth, and comprises that: according to carrier aggregation allocation information in the multicarrier system, each downlink component carrier allocated to the terminal is detected, and a correct/wrong response message HARQ_ACK(i) of each downlink component carrier is obtained; and the terminal selects an available physical uplink control channel N[PUCCH]<(1)> according to a combined state [HARQ_ACK(0), HARQ_ACK(1), ellipsis, HARQ_ACK(M-1)] of correct/wrong response messages of downlink component carriers, and adopts a format 1b of the physical uplink control channel PUCCH to send 2-bit correct/wrong response message information recorded as b(0)b(1), wherein M is the number of the downlink component carriers allocated to the terminal; and the available physical uplink control channel is one of M physical uplink control channels corresponding to the M downlink component carriers, namely N<(1)>PUCCH belongs to a set of N<(1)>[PUCCH, i], wherein i=0, 1, ellipsis, M-1.
Description
Technical field
The present invention relates to digital communicating field, particularly relate to the method that sends correct/error response message in the multicarrier system under a kind of large bandwidth.
Background technology
The develop rapidly of digital communication system is had higher requirement to the reliability of data communication, yet, under severe channel, especially, in high data rate or high-speed mobile environment, multipath interference and Doppler frequency shift etc. seriously affect systematic function.Therefore, effective error-control technique, especially mixing automatic repeat request (Hybrid Automatic Repeat Request, HARQ) technology just becomes the focus that research is endeavoured in the communications field.
In the HARQ mode, the code that sends of making a start not only can error detection, but also has certain error correcting capability.After the receiving terminal decoder is received code word, at first check error situation, if in the error correcting capability of code, automatically carry out error correction; If wrong a lot, surpass the error correcting capability of code, but can detect mistake out, receiving terminal is given to make a start by feedback channel and is sent a decision signal, and requirement is made a start and is retransmitted corresponding codeword information.At OFDM (Orthogonal Frequency Division Multiplexing, OFDM) in system, mean transmission correctly or mistake by correct response message/error response message (ACK/NACK:Acknowledgement/Negative Acknowledgement) control signal, and judge whether to need to retransmit with this.
In the descending HARQ of long evolving system (LTE:Long Term Evolution), the ACK/NACK response message of Physical Downlink Shared Channel (PDSCH:Physical Downlink Shared Channel), when terminal (UE:User Equipment) does not have Physical Uplink Shared Channel (PUSCH:Physical Uplink Shared Channel), be to go physically that control channel (PUCCH:PhysicalUplink Control Channel) is upper to be sent.When PDSCH only comprises a transmission block, terminal will be fed back the ACK/NACK response message of 1 bit, and when PDSCH comprises two transmission blocks, terminal will be fed back the ACK/NACK response message of 2 bits.LTE has defined multiple PUCCH form (format), comprises PUCCH format 1/1a/1b and format 2/2a/2b, and wherein format 1a and 1b are used for respectively feeding back the ACK/NACK response message of 1 bit and the ACK/NACK response message of 2 bits.
In FDD (Frequency Division Duplexing (FDD)) system, because ascending-descending subframes is one to one, therefore, a sub-frame of uplink only feeds back the ACK/NACK response message of a corresponding PDSCH of descending sub frame, according to the bit number of feedback, select PUCCH format 1a or 1b to send and get final product.
And in TDD (time division duplex) system, because the proportionate relationship of ascending-descending subframes is configurable, therefore, when occurring that the descending sub frame number is greater than sub-frame of uplink and counts, just there is a sub-frame of uplink need to feed back the situation of the ACK/NACK response message of the corresponding PDSCH of a plurality of descending sub frames.Current LTE has defined two kinds of feedback models: binding pattern (bundling) and multiplexer mode (Multiplexing).
For binding pattern, the ACK/NACK response message that terminal UE will flow each subframe corresponding codewords detected is carried out bindings (bundling, also claim the logical “and” operation, only have when whole ACK/NACK response messages are ACK, after binding, be ACK, otherwise be NACK), obtain corresponding 1 bit (situation of corresponding 1 streams of code words) or 2 bits (situations of corresponding 2 streams of code words) information, then in the physical downlink control channel PDCCH of the descending sub frame detected with last on corresponding Physical Uplink Control Channel PUCCH, adopt the bit information after format 1a or 1b send binding.
For multiplexer mode, terminal UE is according to the proportionate relationship of up-downgoing, determine that this sub-frame of uplink needs the number M (the descending sub frame number that namely the ACK/NACK response message need to be fed back at this sub-frame of uplink, also referred to as the feedback window) of feeding back ACK/NACK response message; Then respectively the ACK/NACK response message of the streams of code words of each subframe in the feedback window is carried out to bindings, obtain M the feedback states after binding; Then according to the relation of default feedback states and available PUCCH channel and b (0) b (1), select an available Physical Uplink Control Channel PUCCH, adopt format 1b to send b (0) b (1).This mode is selected also referred to as channel.
At the international mobile communication of advanced person (International MobileTelecommunications-Advanced, referred to as IMT-Advanced) in system, can realize the high-speed transfer of data, and have larger power system capacity: in the situation that low speed moves, focus covers, the peak rate of IMT-Advanced system can reach 1Gbit/s; In the situation that high-speed mobile, wide area cover, the peak rate of IMT-Advanced system can reach 100Mbit/s.
In order to meet (the International TelecommunicationUnion-Advanced of advanced International Telecommunications Union, referred to as ITU-Advanced) requirement, senior Long Term Evolution (Long Term Evolution Advanced as the evolution standard of LTE, referred to as LTE-A) system need to support larger system bandwidth (reaching as high as 100MHz), and need the existing standard of backward compatibility LTE.On the basis of existing LTE system, the bandwidth of LTE system can be merged to obtain larger bandwidth, this technology is called carrier aggregation (Carrier Aggregation, referred to as CA) technology, the availability of frequency spectrum, alleviation frequency spectrum resource that this technology can improve the IMT-Advance system are in short supply, and then optimize the utilization of frequency spectrum resource.
After introducing carrier aggregation, current about downlink component carrier with Physical Downlink Shared Channel PDSCH transmission block and mix in the discussion of automatic repeat request HARQ process relation, a groundwork supposition is: when not adopting space division multiplexing, a corresponding PDSCH transmission block of downlink component carrier and a HARQ process, that is to say, UE need to feed back for a PDSCH transmission block of each component carrier the ACK/NACK response message of 1 bit.
In LTE-A system after having adopted the spectrum aggregating technology, upstream bandwidth and downlink bandwidth just can comprise a plurality of component carriers.When scheduling is arranged on a plurality of downlink component carriers when base station to the PDSCH of certain UE, and as UE when current subframe does not have PUSCH to send, terminal need to be fed back the ACK/NACK response message that the PDSCH of these a plurality of downlink component carriers transmits on PUCCH.A kind of direct method is exactly on a plurality of PUCCH channels corresponding with a plurality of downlink component carriers, adopts with the identical mode of LTE, feeds back respectively a plurality of ACK/NACK response messages.This method is fairly simple, can be good at the compatibility of maintenance and LTE, but has a plurality of PUCCH channels to transmit due to up simultaneously, destroyed uplink single-carrier property, when the UE power limited, will affect the detection performance of ACK/NACK, or cause up covering performance to descend.To this, different company has proposed a lot of methods, as the ACK/NACK response message to a plurality of descending carriers carries out feeding back on single PUCCH channel after bindings (namely logic "and" operation).Due to the channel of each carrier wave differs may be larger, therefore, to the method for the ACK/NACK response message binding feedback of a plurality of descending carriers, make throughput decline problem more serious.
In addition, a kind of method that also has channel based on the TDD system to select, the core concept of the method is exactly to utilize different modulation symbol on different PUCCH channels and this channel to mean the different feedback states of all carrier waves., owing to only feeding back on a PUCCH channel, therefore there is not the problem of destroying single-carrier property in the method, the throughput decline problem of simultaneously having avoided binding method to bring, so the method is subject to the support of a plurality of companies.But a major defect of the method is, if directly use the mapping method in the TDD system, 4 downlink component carriers can only be dispatched to UE at most in base station simultaneously, and consider at present about supporting at most 100MHz on the system bandwidth problem of carrier aggregation, so the situation of 5 component carriers is arranged after carrier aggregation.And in top-priority typical application scenarios, can support at most the polymerization of 5 component carriers about needs in the carrier aggregation of current LTE-A, therefore, when 5 downlink component carriers have been dispatched to UE in base station, need the new mapping ruler of design.
Thereby, in the multicarrier system of large bandwidth, need a kind of method that sends correct/error response message in this system on capable physically control channel, solve the transmission problem of how to carry out correct/error response message under large bandwidth in a plurality of downlink component carrier situations.
Summary of the invention
Technical problem to be solved by this invention is, the method that sends correct/error response message on Physical Uplink Control Channel in a kind of multicarrier system under large bandwidth is provided, when realizing the situation of a plurality of downlink component carriers under large bandwidth to the correct transmission of correct storage mistake response message.
In order to address the above problem, the present invention proposes a kind of method that sends correct/error response message, be suitable for terminal in the multicarrier system of large bandwidth and carry out correct/error and reply, comprising:
According to the carrier aggregation configuration information in multicarrier system, detect configuration each downlink component carrier to terminal, obtain the correct/error response message HARQ_ACK (i) of each downlink component carrier;
Terminal according to the assembled state of the correct/error response message of downlink component carrier HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) }, select an available Physical Uplink Control Channel n
pUCCH (1), the form 1b of employing Physical Uplink Control Channel PUCCH sends the correct/error response message information of 2 bits, is designated as b (0) b (1);
Wherein, M is the number of configuration to the downlink component carrier of terminal, and described available Physical Uplink Control Channel is one of M Physical Uplink Control Channel corresponding with M downlink component carrier,
i＝0，1，...，M-1
In addition, when described terminal detection configures to each downlink component carrier of terminal,
At first, the physical downlink control channel PDCCH of each downlink component carrier detected;
Then, the physical downlink control channel PDCCH information out according to demodulation, carry out demodulation to the Physical Downlink Shared Channel PDSCH on each component carrier, thereby obtain the correct/error response message HARQ_ACK (i) of each downlink component carrier.
One of the correct/error response message HARQ_ACK (i) of each downlink component carrier that in addition, described terminal obtains is following three kinds of states:
ACK, mean that terminal correctly receives the Physical Downlink Shared Channel PDSCH on component carrier i;
NACK, mean that terminal does not correctly receive the Physical Downlink Shared Channel PDSCH on component carrier i;
DTX, mean terminal correctly do not receive the physical downlink control channel PDCCH on component carrier i and can't correctly demodulate Physical Downlink Shared Channel PDSCH or base station current subframe on downlink component carrier i not to terminal scheduling Physical Downlink Shared Channel PDSCH.
In addition, if the multicarrier system of described large bandwidth is FDD system, the mode that described terminal is obtained the correct/error response message HARQ_ACK (i) of downlink component carrier i is:
When terminal detects this downlink component carrier i and comprises two streams of code words, the response message HARQ_ACK (i) that this downlink component carrier i is corresponding is defined as: the correct/error response message of described two streams of code words carries out resulting response message after the logical AND operation;
When terminal detects this downlink component carrier i and only has a streams of code words, the response message HARQ_ACK (i) that this downlink component carrier i is corresponding is defined as: the correct/error response message of this streams of code words;
When terminal detects on this downlink component carrier i while to terminal, sending data, the response message HARQ_ACK (i) that this downlink component carrier i is corresponding is defined as: NACK or DTX.
In addition, if the multicarrier system of described large bandwidth is TDD system, the mode that described terminal is obtained the correct/error response message HARQ_ACK (i) of downlink component carrier i is:
When the sub-frame of uplink of upstream components carrier wave corresponding to this downlink component carrier i need feed back the correct/error response message of a plurality of descending sub frames, the correct/error response message of terminal corresponding a plurality of descending sub frames to each streams of code words of this downlink component carrier carries out the logical AND operation, obtain the correct/error response message after binding between subframe, this process is called " binding between subframe ";
Thereby, if terminal detects this downlink component carrier i while comprising two streams of code words, the correct/error response message that terminal has obtained having carried out described " binding between subframe " operation carries out i.e. " binding between streams of code words " operation of logical AND operation of described two streams of code words again, thereby obtains the correct/error response message HARQ_ACK (i) of this downlink component carrier;
Thereby, if terminal detects this downlink component carrier i while only comprising a streams of code words, terminal determines that the correct/error response message that has carried out described " binding between subframe " operation and obtained is the correct/error response message HARQ_ACK (i) of this downlink component carrier;
Wherein, in carrying out described " binding between subframe " operation, if, while sending data in the descending sub frame of this downlink component carrier i this terminal, suppose that its correct/error response message is ACK;
While on this downlink component carrier i, to terminal, not sending data, terminal determines that the feedback states of the correct/error response message that this this downlink component carrier i is corresponding is NACK or DTX.
In addition, the available Physical Uplink Control Channel n that described terminal is selected
pUCCH (1), be that terminal can obtain or by according to the Physical Downlink Control Channel that correctly receives and implicit the obtaining between the Physical Uplink Control Channel index by signaling method; The correct/error response message of the downlink component carrier that this Physical Uplink Control Channel PUCCH is corresponding is necessary for non-DTX state, is ACK state or NACK state.
In addition, the assembled state of the correct/error response message of the M that described terminal an is obtained downlink component carrier { HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) } the available Physical Uplink Control Channel n that selects with described terminal
pUCCH (1)and there are default mapping relations between the transmission form adopted;
The described terminal mapping relations default according to this are determined the Physical Uplink Control Channel n that this is available
pUCCH (1);
Upper 2 bit b (0) b (1) that send of the form 1b that described transmission form is Physical Uplink Control Channel PUCCH.
In addition, described default mapping relations are relevant with the value of M; When M=1, mean that described system does not adopt carrier aggregation technology, terminal adopt with have now Long Term Evolution LTE systems compliant up correct/feedback method of response message.
In addition, described default mapping relations are relevant with the value of M; When M=2/3/4/5, described default mapping relations meet following design principle:
Principle 1: when HARQ-ACK (0), HARQ-ACK (1) ..., HARQ-ACK (M-1) } in the number N of ACK state be greater than zero and while being less than M, merge NACK and DTX state on other component carriers of non-ACK state;
Principle 2: as { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } in the number of ACK state be 0 o'clock, select one can correctly demodulation physical downlink control channel PDCCH the corresponding Physical Uplink Control Channel PUCCH of component carrier fed back, the feedback states of the correct/error response message of the component carrier that this Physical Uplink Control Channel PUCCH is corresponding is necessary for NACK, remerges NACK and DTX state on other component carriers;
Principle 3: when the feedback states of the correct/error response message on all downlink component carriers all is DTX, terminal does not send any signal to base station;
Principle 4: when the number M=4 of descending component carrier, according to the number of N, the state obtained according to described principle 1 is further merged, the partial status of N=3 and N=2 is merged; When the number M=5 of descending component carrier, number according to N, the state obtained according to described principle 1 is further merged, the partial status of N=1 and N=2 is merged, the partial status of the partial status of the remainder of N=2 and N=3 is merged, by the remaining part state of N=3 and the status merging of N=4; As the number M=5 of descending component carrier, and during N=0, if { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } in while having the correct/error response message of 4 component carriers to be the DTX state, terminal does not send any signal to base station.
Adopt correct/error response message sending method of the present invention, terminal, on the basis of the feedback system of the existing LTE of compatibility, can also be fed back the feedback information on received downlink component carrier, thereby can not cause the decline of throughput of system performance.Simultaneously, terminal can adopt the feedback information of each downlink component carrier of PUCCH channel feedback, thereby has kept up single carrier, and this is particularly important for covering limited terminal UE.In addition, owing to having adopted default mapping relations of the present invention, also solve the feedback problem of uplink ACK/NACK response message in all typical application scenarios of carrier aggregation of current LTE-A definition, there is sufficient fault-tolerant compatibility.
The accompanying drawing explanation
Fig. 1 is the process chart that terminal sends the ACK/NACK response message;
Fig. 2 is the schematic diagram that terminal obtains the ACK/NACK response message of each downlink component carrier in the FDD system;
Fig. 3 is the schematic diagram that terminal obtains the ACK/NACK response message of each downlink component carrier in the TDD system;
Fig. 4 is the specific design schematic flow sheet of default mapping relations design principle while adopting M=2/3/4/5;
Fig. 5～Fig. 8 is when M=5/4/3/2, the assembled state of the ACK/NACK response message of downlink component carrier { HARQ_ACK (0), HARQ_ACK (1), ..., HARQ_ACK (M-1) } with the available PUCCH channel of selecting and PUCCH form 1b in the specific embodiment signal chart of default mapping relations of 2 bit information b (0) b (1).
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
In the system that has adopted carrier aggregation technology, when scheduling is arranged on M downlink component carrier when base station to the PDSCH of certain UE, and when current subframe does not have PUSCH to send, terminal need to be fed back the ACK/NACK response message of the PDSCH transmission of this M downlink component carrier on PUCCH as UE.Multicarrier system for the large bandwidth that adopts carrier aggregation technology, there is no the preferably problem of the feedback method of correct/error response message at present, the invention provides a kind of method of corresponding transmission correct/error response message.
When the present invention is intended to provide UE and adopts the method for selecting based on channel to carry out the ACK/NACK feedback, mapping relations between 2 bit information b (0) b (1) that carry on the combinations of states of the ACK/NACK response message of M downlink component carrier and the PUCCH channel of selection and this channel, and adopt described mapping relations to carry out the method for ACK/NACK response message feedback.
For convenience of description, suppose that the ACK/NACK response message on downlink component carrier i is expressed as HARQ_ACK (i), i=0 wherein, 1, ..., M-1, M configures the number to the downlink component carrier of UE in base station constantly for certain, HARQ_ACK (i) ∈ { ACK, NACK, DTX}; Wherein:
ACK means that UE correctly receives the PDSCH on component carrier i,
NACK means that UE does not correctly receive the PDSCH on component carrier i,
DTX mean UE correctly do not receive the PDCCH on component carrier i thereby can't correctly demodulate PDSCH or base station current subframe on downlink component carrier i to UE scheduling PDSCH.
The channel indexes that terminal UE obtains the available PUCCH channel of its correspondence according to the physical downlink control channel PDCCH on component carrier i is n
pUCCH, i (1), the assembled state of the ACK/NACK response message of the M that UE need to a feed back downlink component carrier can be expressed as HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) }; The upper dibit information sent of PUCCH form 1b is designated as b (0) b (1);
The main thought that sends the ACK/NACK response message in the present invention comprises: terminal UE, according to the carrier aggregation configuration information, detects configuration each downlink component carrier to it, obtains the ACK/NACK response message HARQ_ACK (i) of each downlink component carrier; According to the assembled state of the ACK/NACK response message of M downlink component carrier HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) }, select an available PUCCH channel n
pUCCH (1), adopt PUCCH form 1b to send 2 bit information b (0) b (1), described available PUCCH channel is
i＝0，1，...，M-1
Fig. 1 has provided and has adopted UE of the present invention to send the handling process of ACK/NACK response message:
In described step 103, for the terminal of FDD system and TDD system, the mode that corresponding terminal UE obtains the ACK/NACK response message HARQ_ACK (i) of certain downlink component carrier is different.
For the FDD system:
When UE detects certain downlink component carrier and comprises two streams of code words, the ACK/NACK that its corresponding response message is two streams of code words carries out the response message obtained after the logical AND operation;
Obtain certain downlink component and carry while only having a streams of code words, the response message of the ACK/NACK that its corresponding response message is this streams of code words when UE detects;
While on certain component carrier, to UE, not sending data, its corresponding feedback states is NACK or DTX.
Fig. 2 has provided in the step 103 of Fig. 1, and in the FDD system, UE obtains the schematic diagram of the ACK/NACK response message of each downlink component carrier.Specific as follows described:
For component carrier # 0,2 streams of code words detected on this component carrier due to UE, therefore, UE need to carry out the logical AND operation to the ACK/NACK response message of 2 streams of code words on this component carrier, a response message after being bound, be designated as HARQ-ACK (0) here;
For component carrier # 1,1 streams of code words only detected on this component carrier due to UE,, therefore, the ACK/NACK response message that on this component carrier, corresponding feedback states is streams of code words # 0 on it, be designated as HARQ-ACK (1);
For component carrier # 2,2 streams of code words detected on this component carrier due to UE, therefore, UE need to carry out the logical AND operation to the ACK/NACK response message of 2 streams of code words on this component carrier, a response message after being bound, be designated as HARQ-ACK (2) here;
For component carrier # 3,2 streams of code words detected on this component carrier due to UE, therefore, UE need to carry out the logical AND operation to the ACK/NACK response message of 2 streams of code words on this component carrier, a response message after being bound, be designated as HARQ-ACK (3) here;
For component carrier # 4,2 streams of code words detected on this component carrier due to UE, therefore, UE need to carry out the logical AND operation to the ACK/NACK response message of 2 streams of code words on this component carrier, a response message after being bound, be designated as HARQ-ACK (4) here.
For the TDD system:
When the sub-frame of uplink of upstream components carrier wave corresponding to certain downlink component carrier need to feed back the ACK/NACK response message of a plurality of descending sub frames, UE need to be corresponding to each streams of code words of this downlink component carrier the ACK/NACK response message of a plurality of descending sub frames carry out the logical AND operation, obtain the ACK/NACK response message after binding between subframe; This process is called " binding between subframe ";
● when UE detects certain downlink component carrier and comprises 2 streams of code words, the ACK/NACK response message that UE need to obtain after above-mentioned " binding between subframe " operation is carried out " binding between streams of code words " operation again, thereby obtains the ACK/NACK response message HARQ_ACK (i) of this downlink component carrier;
● obtain certain downlink component and carry while only having a streams of code words, its corresponding response message " binds " for this streams of code words the ACK/NACK obtained after operation response message between subframe when UE detects
● in the middle of " binding between subframe " operation, if, while in certain descending sub frame, to this UE, not sending data, suppose that its ACK/NACK response message is ACK;
While on certain component carrier, to UE, not sending data, its corresponding feedback states is NACK or DTX.
Fig. 3 has provided in the step 103 of Fig. 1, and in the TDD system, UE obtains the schematic diagram of the ACK/NACK response message of each downlink component carrier.Specific as follows described: as to suppose that a sub-frame of uplink need to feed back 4 descending sub frame ACK/NACK response messages here:
For component carrier # 0,2 streams of code words detected on this component carrier due to UE, therefore, UE need to first carry out " binding between subframe " operation to the ACK/NACK response message of 2 corresponding descending sub frames of streams of code words on this component carrier, and then carry out " between streams of code words, binding " operation, a response message after finally being bound, be designated as HARQ-ACK (0) here; When carrying out " binding between subframe " operation, for streams of code words # 1, owing at descending sub frame # 1, to UE, not sending data, therefore, when carrying out " binding between subframe " operation, the response message of this descending sub frame is assumed to be ACK;
For component carrier # 1,1 streams of code words only detected on this component carrier due to UE, UE need to carry out " binding between subframe " operation to the ACK/NACK response message of the corresponding descending sub frame of streams of code words # 0 on this component carrier, thereby a response message after being bound, be designated as HARQ-ACK (1) here;
For component carrier # 2,2 streams of code words detected on this component carrier due to UE, therefore, UE need to first carry out " binding between subframe " operation to the ACK/NACK response message of 2 corresponding descending sub frames of streams of code words on this component carrier, and then carry out " between streams of code words, binding " operation, a response message after finally being bound, be designated as HARQ-ACK (2) here; When carrying out " binding between subframe " operation, for streams of code words # 1, owing at descending sub frame # 2, to UE, not sending data, therefore, when carrying out " binding between subframe " operation, the response message of this descending sub frame is assumed to be ACK;
For component carrier # 3,2 streams of code words detected on this component carrier due to UE, therefore, UE need to first carry out " binding between subframe " operation to the ACK/NACK response message of 2 corresponding descending sub frames of streams of code words on this component carrier, and then carry out " between streams of code words, binding " operation, a response message after finally being bound, be designated as HARQ-ACK (3) here;
For component carrier # 4, the data of distributing to it does not detected on this component carrier due to UE, therefore, the ACK/NACK response message HARQ-ACK (4) that component carrier # 4 is corresponding is NACK or DTX.
In the described step 104 of Fig. 1, available PUCCH channel is that UE can obtain, be to obtain or mode by signaling obtains according to implicit between the Physical Downlink Control Channel correctly received and PUCCH channel indexes specifically, that is to say that the ACK/NACK response message of the downlink component carrier corresponding with this PUCCH channel is necessary for non-DTX state.
In the described step 104 of Fig. 1, assembled state { the HARQ_ACK (0) of the ACK/NACK response message of upper 2 bit b (0) b (1) that send of the PUCCH channel of selecting and PUCCH form 1b and M downlink component carrier, HARQ_ACK (1), ..., HARQ_ACK (M-1) } default mapping relations are arranged; Described preset relation is relevant with the value of M, specifically,
(do not adopt carrier aggregation technology) when M=1, the feedback method of uplink ACK/NACK response message is consistent with existing LTE system.
When M=2/3/4/5, its design meets following design principle:
Principle 1: as { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } in the number of ACK while being N (0<N<M), do not distinguish NACK and DTX state on all the other (M-N) individual component carriers, namely merge NACK and DTX state on other component carriers;
Principle 2: as { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } in the number of ACK be 0 o'clock, when namely UE does not correctly receive the data of any downlink component carrier, to select the correctly corresponding PUCCH channel of component carrier of demodulation PDCCH to be fed back, the ACK/NACK feedback states of the component carrier that the PUCCH channel of namely selecting is corresponding is necessary for NACK, then do not distinguish NACK and DTX state on other component carriers, namely merge NACK and DTX state on other component carriers;
Principle 3: when the feedback states on all downlink component carriers all is DTX, UE does not send any signal to base station;
Principle 4: when the number M=4/5 of descending component carrier, the status number that can express due to the combination of available PUCCH channel and b (0) b (1) is less than { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } possible combinations of states number, therefore, existence merges and (refers to different { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } combinations of states adopts identical PUCCH channel and b (0) b (1) combination to mean) situation:
● during for M=4, according to the number of N, the state obtained in described principle 1 is further merged, specifically, the partial status of N=3 and N=2 is merged;
● during for M=5, number according to N, the state obtained in described principle 1 is further merged, specifically, the partial status of N=1 and N=2 is merged, the partial status of the partial status of the remainder of N=2 and N=3 is merged, by the remaining part state of N=3 and the status merging of N=4;
● during for M=5 and N=0, when HARQ-ACK (0), HARQ-ACK (1) ..., HARQ-ACK (M-1) } in while having the response message of 4 component carriers to be DTX, UE does not send any signal yet to base station.
Fig. 4 has provided the specific design schematic flow sheet of default mapping relations design principle while adopting above-mentioned M=2/3/4/5, specifically describes as follows:
Statistics HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) } in the response message number that is ACK, be designated as N;
When N=0, adopt above-mentioned principle 1 to carry out channel selection and status merging;
When N>0, adopt above-mentioned principle 2 to carry out channel selection and status merging;
Finally, for the situation of M=4/5, adopt principle 4 to carry out further status merging.
According to above design principle, default mapping relations of the present invention have following characteristics:
When M=2, after adopting principle 1 and principle 2 to carry out status merging, (HARQ_ACK (0), HARQ_ACK (1)) status number is 5, and the number of combinations of available PUCCH channel and b (0) b (1) is 2*4=8, therefore, situation for M=2, the assembled state of PUCCH and b (0) b (1) counts up to all-round enough (H4RQ_ACK (0) of expression, HARQ_ACK (1)) possible assembled state number, thereby do not need to carry out the status merging of principle 4;
When M=3, after adopting principle 1 and principle 2 to carry out status merging, (HARQ_ACK (0), HARQ_ACK (1), HARQ_ACK (2)) status number is 10, and the number of combinations of available PUCCH channel and b (0) b (1) is 3*4=12, therefore, situation for M=3, the assembled state of PUCCH and b (0) b (1) counts up to all-round enough (HARQ_ACK (0) of expression, HARQ_ACK (1), HARQ_ACK (2)) possible assembled state number, thereby do not need to carry out the status merging of principle 4;
When M=4, after adopting principle 1 and principle 2 to carry out status merging, (HARQ_ACK (0), HARQ_ACK (1), HARQ_ACK (2), HARQ_ACK (3)) status number is 19, and the number of combinations of available PUCCH channel and b (0) b (1) is 4*4=16, therefore, situation for M=4, the assembled state number of PUCCH and b (0) b (1) can not mean (HARQ_ACK (0), HARQ_ACK (1), HARQ_ACK (2), HARQ_ACK (3)) whole possibility assembled state numbers, thereby need to carry out the status merging of principle 4, partial status to N=3 and N=2 is merged,
When M=5, after adopting principle 1 and principle 2 to carry out status merging, (HARQ_ACK (0), HARQ_ACK (1), HARQ_ACK (2), HARQ_ACK (3), HARQ_ACK (4)) status number is 36, and the number of combinations of available PUCCH channel and b (0) b (1) is 5*4=20, therefore, situation for M=4, the assembled state number of PUCCH and b (0) b (1) can not mean (HARQ_ACK (0), HARQ_ACK (1), HARQ_ACK (2), HARQ_ACK (3), HARQ_ACK (4)) whole possibility assembled state numbers, thereby need to carry out the status merging of principle 4, the partial status of N=1 and N=2 is merged, the partial status of the partial status of the remainder of N=2 and N=3 is merged, by the remaining part state of N=3 and the status merging of N=4, like this, situation for N>0, need altogether to mean 16 kinds of different states, because the number of combinations of available PUCCH channel and b (0) b (1) is 20, and 2 carry out after status merging having 5 kinds of situations on principle, 4 kinds of remaining situations can not these 5 kinds of situations of perfect representation, thereby as (HARQ_ACK (0), HARQ_ACK (1), HARQ_ACK (2), HARQ_ACK (3), the response message that 4 component carriers are arranged HARQ_ACK (4)) is DTX, when the response message of 1 component carrier is NACK, UE does not send any signal yet to base station.
When Fig. 5～Fig. 8 has provided M=5/4/3/2 of the present invention, the assembled state of the ACK/NACK response message of downlink component carrier { HARQ_ACK (0), HARQ_ACK (1), ..., HARQ_ACK (M-1) } with the available PUCCH channel of selecting and PUCCH form 1b in the embodiment of default mapping relations of 2 bit information b (0) b (1).N/A in Fig. 5～Fig. 8 means that UE does not send any signal to base station.
Adopt sending method of the present invention, UE can feed back the feedback information on received downlink component carrier, thereby can not cause the decline of throughput of system performance.Simultaneously, UE can adopt the feedback information of each downlink component carrier of PUCCH channel feedback, thereby has kept up single carrier, and this is particularly important for covering limited UE.In addition, adopt default mapping relations of the present invention, solved the feedback problem of uplink ACK/NACK response message in all typical application scenarios of carrier aggregation of current LTE-A definition.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (6)
1. a method that sends correct/error response message, be suitable for terminal in the multicarrier system of large bandwidth and carry out correct/error and reply, and it is characterized in that, comprising:
According to the carrier aggregation configuration information in multicarrier system, detect configuration each downlink component carrier to terminal, obtain the correct/error response message HARQ_ACK (i) of each downlink component carrier;
One of the correct/error response message HARQ_ACK (i) of each downlink component carrier that described terminal obtains is following three kinds of states:
ACK, mean that terminal correctly receives the Physical Downlink Shared Channel PDSCH on component carrier i;
NACK, mean that terminal does not correctly receive the Physical Downlink Shared Channel PDSCH on component carrier i;
DTX, mean terminal correctly do not receive the physical downlink control channel PDCCH on component carrier i and can't correctly demodulate Physical Downlink Shared Channel PDSCH or base station current subframe on downlink component carrier i not to terminal scheduling Physical Downlink Shared Channel PDSCH;
Terminal according to the assembled state of the correct/error response message of downlink component carrier HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) }, select an available Physical Uplink Control Channel
the form 1b of employing Physical Uplink Control Channel PUCCH sends the correct/error response message information of 2 bits, is designated as b (0) b (1);
Wherein, M is the number of configuration to the downlink component carrier of terminal, and described available Physical Uplink Control Channel is one of M Physical Uplink Control Channel corresponding with M downlink component carrier,
i＝0，1，...，M-1；
The assembled state of the correct/error response message of the M that described terminal an is obtained downlink component carrier HARQ_ACK (0), HARQ_ACK (1) ..., HARQ_ACK (M-1) } the available Physical Uplink Control Channel selected with described terminal
and there are default mapping relations between the transmission form adopted;
The described terminal mapping relations default according to this are determined the Physical Uplink Control Channel that this is available
Upper 2 bit b (0) b (1) that send of the form 1b that described transmission form is Physical Uplink Control Channel PUCCH;
Described default mapping relations are relevant with the value of M; When M=2/3/4/5, described default mapping relations meet following design principle:
Principle 1: when HARQ-ACK (0), HARQ-ACK (1) ..., HARQ-ACK (M-1) } in the number N of ACK state be greater than zero and while being less than M, merge NACK and DTX state on other component carriers of non-ACK state;
Principle 2: as { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } in the number of ACK state be 0 o'clock, select one can correctly demodulation physical downlink control channel PDCCH the corresponding Physical Uplink Control Channel PUCCH of component carrier fed back, the feedback states of the correct/error response message of the component carrier that this Physical Uplink Control Channel PUCCH is corresponding is necessary for NACK, remerges NACK and DTX state on other component carriers;
Principle 3: when the feedback states of the correct/error response message on all downlink component carriers all is DTX, terminal does not send any signal to base station;
Principle 4: when the number M=4 of descending component carrier, according to the number of N, the state obtained according to described principle 1 is further merged, the partial status of N=3 and N=2 is merged; When the number M=5 of descending component carrier, number according to N, the state obtained according to described principle 1 is further merged, the partial status of N=1 and N=2 is merged, the partial status of the partial status of the remainder of N=2 and N=3 is merged, by the remaining part state of N=3 and the status merging of N=4; As the number M=5 of descending component carrier, and during N=0, if { HARQ-ACK (0), HARQ-ACK (1), ..., HARQ-ACK (M-1) } in while having the correct/error response message of 4 component carriers to be the DTX state, terminal does not send any signal to base station.
2. the method for claim 1, is characterized in that,
When described terminal detection configures to each downlink component carrier of terminal,
At first, the physical downlink control channel PDCCH of each downlink component carrier detected;
Then, the physical downlink control channel PDCCH information out according to demodulation, carry out demodulation to the Physical Downlink Shared Channel PDSCH on each component carrier, thereby obtain the correct/error response message HARQ_ACK (i) of each downlink component carrier.
3. the method for claim 1, is characterized in that,
If the multicarrier system of described large bandwidth is FDD system, the mode that described terminal is obtained the correct/error response message HARQ_ACK (i) of downlink component carrier i is:
When terminal detects this downlink component carrier i and comprises two streams of code words, the response message HARQ_ACK (i) that this downlink component carrier i is corresponding is defined as: the correct/error response message of described two streams of code words carries out resulting response message after the logical AND operation;
When terminal detects this downlink component carrier i and only has a streams of code words, the response message HARQ_ACK (i) that this downlink component carrier i is corresponding is defined as: the correct/error response message of this streams of code words;
When terminal detects on this downlink component carrier i while to terminal, sending data, the response message HARQ_ACK (i) that this downlink component carrier i is corresponding is defined as: NACK or DTX.
4. the method for claim 1, is characterized in that,
If the multicarrier system of described large bandwidth is TDD system, the mode that described terminal is obtained the correct/error response message HARQ_ACK (i) of downlink component carrier i is:
When the sub-frame of uplink of upstream components carrier wave corresponding to this downlink component carrier i need feed back the correct/error response message of a plurality of descending sub frames, the correct/error response message of terminal corresponding a plurality of descending sub frames to each streams of code words of this downlink component carrier carries out the logical AND operation, obtain the correct/error response message after binding between subframe, this process is called " binding between subframe ";
Thereby, if terminal detects this downlink component carrier i while comprising two streams of code words, the correct/error response message that terminal has obtained having carried out described " binding between subframe " operation carries out i.e. " binding between streams of code words " operation of logical AND operation of described two streams of code words again, thereby obtains the correct/error response message HARQ_ACK (i) of this downlink component carrier;
Thereby, if terminal detects this downlink component carrier i while only comprising a streams of code words, terminal determines that the correct/error response message that has carried out described " binding between subframe " operation and obtained is the correct/error response message HARQ_ACK (i) of this downlink component carrier;
Wherein, in carrying out described " binding between subframe " operation, if, while sending data in the descending sub frame of this downlink component carrier i this terminal, suppose that its correct/error response message is ACK;
While on this downlink component carrier i, to terminal, not sending data, terminal determines that the feedback states of the correct/error response message that this this downlink component carrier i is corresponding is NACK or DTX.
5. the method for claim 1, is characterized in that,
The available Physical Uplink Control Channel that described terminal is selected
that terminal can obtain or by according to the Physical Downlink Control Channel that correctly receives and implicit the obtaining between the Physical Uplink Control Channel index by signaling method; The correct/error response message of the downlink component carrier that this Physical Uplink Control Channel PUCCH is corresponding is necessary for non-DTX state, is ACK state or NACK state.
6. the method for claim 1, is characterized in that, described default mapping relations are relevant with the value of M; When M=1, mean that described system does not adopt carrier aggregation technology, terminal adopt with have now Long Term Evolution LTE systems compliant up correct/feedback method of response message.
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| CN2009101506081A CN101594211B (en) | 2009-06-19 | 2009-06-19 | Method for sending correct/wrong response message in multicarrier system with big bandwidth |
| PCT/CN2010/072824 WO2010145373A1 (en) | 2009-06-19 | 2010-05-17 | Method and terminal for transmitting acknowledgement/negative acknowledgement message |
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| CN2009101506081A CN101594211B (en) | 2009-06-19 | 2009-06-19 | Method for sending correct/wrong response message in multicarrier system with big bandwidth |
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Also Published As
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| CN101594211A (en) | 2009-12-02 |
| WO2010145373A1 (en) | 2010-12-23 |
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