CN102136894B

CN102136894B - Method and device for determining ACK (acknowledgement)/NACK (negative Acknowledgement) feedback bit number

Info

Publication number: CN102136894B
Application number: CN 201110090839
Authority: CN
Inventors: 高雪娟; 沈祖康; 林亚男
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2013-10-16
Anticipated expiration: 2031-04-12
Also published as: CN102136894A

Abstract

The invention discloses a method and a device for determining ACK (acknowledgement)/NACK (negative Acknowledgement) feedback bit number, and an indicating method and an indicating device for determining the ACK/NACK feedback bit number, which are used for enabling a UE (user equipment) to dynamically determine the ACK/NACK feedback bit number according to a configured downstream carrier, an activated downstream carrier or an indicated downstream carrier set, so as to improve the transmission reliability and transmission efficiency of the ACK/NACK information. The indicating method for determining the ACK/NACK feedback bit number comprises the following steps: a substation determines the indication information, wherein the indication information is used for indicating the UE to determine the mode of the ACK/NACK feedback bit number; and the substation sends the indication information to the UE through a physical downstream control communication channel (PDCCH).

Description

A kind of method of definite ACK/NACK number of bits of feedback and device

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method and device of definite ACK/NACK number of bits of feedback.

Background technology

For long-term evolution upgrading (LTE-A) carrier aggregation (CA, Carrier Aggregation) system is in order to support the wider system bandwidth than Long Term Evolution (LTE) system, such as 100MHz, a kind of may be the frequency spectrum that directly distributes the 100M bandwidth, as shown in Figure 1.Another kind may be to distribute to some spectrum aggregatings of existing system, gather into large bandwidth and supply with the long-term evolution multi-carrier system use, the up-downgoing carrier wave can asymmetricly dispose in the system at this moment, be that the user may take the individual carrier wave of N (N 〉=1) and carries out downlink transfer, take the individual carrier wave of M (M 〉=1) and carry out uplink, N is not equal to M, as shown in Figure 2.

The LTE-A system determines to support at most 5 carrier waves to carry out polymerization at present, a LTE-A system customer equipment (UE, User Equipment, also become user terminal) need to be at the positive acknowledgement (ACK of a plurality of descending carriers of same sub-frame of uplink internal feedback and descending sub frame, Acknowledgment) or Negative Acknowledgement (NACK, Negative Acknowledgment) information (below be abbreviated as ACK/NACK).In the LTE-A system, can pass through high-level signaling, i.e. media access control (MAC, Medium Access Control) signaling activates or deexcitation the descending carrier of UE configuration or polymerization.Because needing one section, the high-level signaling reconfiguration course comes into force the phase, in this section period, the base station can not judge whether activation or the deactivating operation to UE configuration carrier wave comes into force, if determine the ACK/NACK number of bits of feedback according to activating carrier number, then because the fuzzy period in carrier activation or deactivation process, UE and base station cause activating understanding differently of carrier number, can cause UE and base station that understanding differently of ACK/NACK number of bits of feedback caused, thereby cause the base station can't correctly receive the ACK/NACK feedback of UE, therefore in the LTE-ARel-10 system, the bit number of the ACK/NACK feedback information of UE feedback is determined according to the descending carrier number of UE configuration, that is:

For Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) system, UE is N+N at the ACK/NACK feedback information bits number that a sub-frame of uplink need to feed back ₀, wherein N is the descending carrier number of UE configuration, N0 is that transmission mode is the descending carrier number of many code words (2 code words).

For time division duplex (TDD, Time Division Duplex) system, UE is M (N+N at the ACK/NACK feedback information bits number that a sub-frame of uplink need to feed back ₀), wherein M carries out the descending sub frame number of ACK/NACK feedback for a corresponding sub-frame of uplink on each descending carrier, M is different with different uplink-downlink configuration values to different sub-frame of uplink, is descending sub frame set { k corresponding to each sub-frame of uplink shown in the following table 1 ₀, k ₁, Λ k _M-1In descending sub frame sum.Especially, for uplink-downlink configuration 0 and 5 under regular circulation prefix (CP, Cyclic Prefix), and the special descending sub frame of uplink-downlink configuration 0 and 4 under expansion CP, can not count, namely M can not comprise this subframe, and UE is not to this subframe feeding back ACK/NACK.

Table 1

Determined in the LTE-A system that Physical Uplink Control Channel form 1b (PUCCHFormat 1b with channel selection) that channel is selected and Physical Uplink Control Channel form 3 (PUCCH format 3) are as the multiplexing transmission scheme of ACK/NACK information, wherein, the maximum transmitted bit number of PUCCH Format 1b with channel selection transmission plan is 4 bits, and the maximum transmitted bit number of PUCCH format 3 transmission plans is 20 bits.Which kind of transmission plan transferring ACK/NACK feedback information the base station specifically adopts by signal deployment UE.When the ACK/NACK of UE number of bits of feedback surpasses the transmission capacity of allocation plan, need to merge the ACK/NACK feedback information, comprise that the space merges (spatial bundling), time domain merges merging modes such as (time-domain bundling), thereby the limit feedback bit number is no more than transmission capacity.PUCCH format 3 schemes adopt different coded systems for different ACK/NACK number of bits of feedback, when the ACK/NACK number of bits of feedback is no more than 11 bit, adopt RM (Reed-Muller) coded system, namely reuse the RM (32 of Rel-8 system, O)+and repeat (repetition) coded system the ACK/NACK feedback bits is encoded to bit (coded bits) after 48 bits of encoded, transmit at 2 time slots; When the ACK/NACK number of bits of feedback surpasses 11 bits but is no more than 20 bit, adopt the Dual-RM coded system, at first the ACK/NACK feedback bits is divided into 2 groups, every group is adopted RM (32, O)+brachymemma (truncation) coded system is encoded to 24 bit coded bits with the ACK/NACK feedback bits, transmits at 2 time slots respectively.

For PUCCH format 3 schemes, the ACK/NACK transmission performance of different coding mode is different, and the ACK/NACK number of bits of feedback is larger, and coding gain is less, and the ACK/NACK transmission performance is poorer.In addition, ACK/NACK merged to cause unnecessary re-transmission, thereby affect throughput of system.When UE is not in carrier activation or deexcitation pattern during the period, UE only can be on the descending carrier that activates receive data, if always the descending carrier number according to configuration or polymerization carries out the ACK/NACK feedback, UE need to produce at least 1 bit NACK as feedback information to the descending carrier (for example deexcitation descending carrier in the configurating downlink carrier wave) that does not receive data, thereby increased unnecessary ACK/NACK feedback information volume, may introduce ACK/NACK feedback information union operation, reduce the ACK/NACK transmission availability, increasing unnecessary system retransmits, perhaps because number of bits of feedback is larger, PUCCH format 3 needs to adopt the Dual-RM coding, has reduced the ACK/NACK information transmission performance.

In sum, in the LTE-A system, if always determine the ACK/NACK number of bits of feedback according to the descending carrier number of UE configuration or polymerization, when the descending carrier number of UE activation is counted less than the descending carrier of configuration or polymerization, can increase unnecessary ACK/NACK feedback information bits number, thereby cause ACK/NACK feedback information union operation, reduce ACK/NACK communication validity, increasing unnecessary system retransmits, perhaps because number of bits of feedback is larger, reduce coding gain, and then reduced the ACK/NACK information transmission performance.

Summary of the invention

The embodiment of the invention provides a kind of method and device of definite ACK/NACK number of bits of feedback, and, a kind of indicating means of definite ACK/NACK number of bits of feedback and device, with so that UE can dynamically determine the ACK/NACK number of bits of feedback according to the descending carrier of the descending carrier that disposes or activation or the descending carrier set of indication, improve transmission reliability and the efficiency of transmission of ACK/NACK information.

The indicating means of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises:

Indication information is determined in the base station, and wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback;

Described base station sends to described UE by physical downlink control channel PDCCH with described indication information.

The method of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises:

User equipment (UE) obtains indication information by physical downlink control channel PDCCH, and wherein, described indication information is used to indicate the mode that described UE determines the ACK/NACK number of bits of feedback;

Described UE determines the ACK/NACK number of bits of feedback according to described indication information.

The indicating device of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises:

The indication information determining unit is used for determining indication information that wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback;

The indication information transmitting element is used for by physical downlink control channel PDCCH described indication information being sent to described UE.

The device of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises:

The indication information acquiring unit is used for obtaining indication information by physical downlink control channel PDCCH, and wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback;

Determining unit is used for described UE according to described indication information, determines the ACK/NACK number of bits of feedback.

The embodiment of the invention, indication information is determined in the base station, wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback; Described base station sends to described UE by physical downlink control channel PDCCH with described indication information.Thereby realized by PDCCH dynamic-configuration UE determines the ACK/NACK number of bits of feedback according to which descending carrier.

The embodiment of the invention, user equipment (UE) obtains indication information by physical downlink control channel PDCCH, and wherein, described indication information is used to indicate the mode that described UE determines the ACK/NACK number of bits of feedback; Described UE determines the ACK/NACK number of bits of feedback according to described indication information.Thereby UE determines which descending carrier to determine the ACK/NACK number of bits of feedback according to according to the dynamic-configuration of passing through PDCCH of base station side.And then avoiding UE and base station the ACK/NACK number of bits of feedback to be understood differently on the basis that causes, reduce the ACK/NACK number of bits of feedback, avoided ACK/NACK information to merge, improved ACK/NACK communication reliability and system's retransmission efficiency.

Description of drawings

Fig. 1 is the single-frequency spectral system schematic;

Fig. 2 is the frequency spectrum polymerization system schematic diagram;

The schematic flow sheet of the indicating means of a kind of definite ACK/NACK number of bits of feedback that Fig. 3 provides for the embodiment of the invention;

The schematic flow sheet of the method for a kind of definite ACK/NACK number of bits of feedback that Fig. 4 provides for the embodiment of the invention;

Definite schematic diagram of the ACK/NACK number of bits of feedback among the embodiment 1 that Fig. 5 provides for the embodiment of the invention;

Definite schematic diagram of the ACK/NACK number of bits of feedback among the embodiment 1 that Fig. 6 provides for the embodiment of the invention;

Definite schematic diagram of the ACK/NACK number of bits of feedback among the embodiment 1 that Fig. 7 provides for the embodiment of the invention;

Definite schematic diagram of the ACK/NACK number of bits of feedback among the embodiment 2 that Fig. 8 provides for the embodiment of the invention;

Definite schematic diagram of the ACK/NACK number of bits of feedback among the embodiment 2 that Fig. 9 provides for the embodiment of the invention;

Definite schematic diagram of the ACK/NACK number of bits of feedback among the embodiment 2 that Figure 10 provides for the embodiment of the invention;

The structural representation of the indicating device of a kind of definite ACK/NACK number of bits of feedback that Figure 11 provides for the embodiment of the invention;

The structural representation of the device of a kind of definite ACK/NACK number of bits of feedback that Figure 12 provides for the embodiment of the invention.

Embodiment

The embodiment of the invention has provided a kind of by Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) signaling dynamic-configuration UE determines the scheme of ACK/NACK number of bits of feedback according to the carrier wave of the carrier wave that disposes or activation, on the basis of avoiding UE and base station to understand differently causing, improve transmission reliability and the efficiency of transmission of ACK/NACK information.

For having carrier aggregation (CA in the LTE-A system, Carrier Aggregation) UE of ability, when the base station is activated UE polymerization carrier wave by high-level signaling or during deexcitation, because needing one section, the high-level signaling reconfiguration course comes into force the phase, come into force interim in this section, the base station can not judge whether high level comes into force to reshuffling of UE polymerization carrier wave, therefore may exist UE and base station that UE is activated understanding differently of carrier number and cause situation.Cause for fear of understanding differently of UE and base station, definition is determined the ACK/NACK number of bits of feedback according to the descending carrier number of UE configuration in the standard at present, when the descending carrier number of UE activation is counted less than the descending carrier of configuration, the ACK/NACK number of bits of feedback of determining is greater than the number of bits of feedback of actual needs, thereby affects the ACK/NACK transmission performance.Therefore the embodiment of the invention has provided a kind of definite scheme of ACK/NACK number of bits of feedback, on the basis of avoiding UE and base station to understand differently causing, and raising ACK/NACK transmission reliability and efficient.

The below provides the explanation of the concrete scheme that the embodiment of the invention provides.

Referring to Fig. 3, in base station side, the indicating means of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises step:

Indication information is determined in S101, base station, and wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback.

S102, described base station send to described UE by physical downlink control channel PDCCH with described indication information.

Preferably, described base station sends to described UE by PDCCH with described indication information, comprising:

Described base station indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates by the indication of 1 bit among described PDCCH domain information.

Preferably, described base station indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates by the indication of 1 bit among described PDCCH domain information, comprising:

The descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates;

In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration.

Perhaps, described base station sends to described UE by PDCCH with described indication information, comprising:

A descending carrier set is indicated by the indication of the K bit among described PDCCH domain information in described base station, is used for described UE and determines the ACK/NACK number of bits of feedback according to described descending carrier set, and wherein, K is the integer more than or equal to 1.

Preferably, described K bit indication domain information, a descending carrier in a plurality of descending carriers set of making an appointment by high-level signaling configuration or base station and described UE in advance in the indication base station is gathered; Perhaps,

The descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information.

Preferably, for FDD system, the descending carrier set of described K bit indication domain information indication is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink;

For TDD system:

The descending carrier set of described K bit indication domain information indication is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps,

The descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of described K bit indication domain information indication is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of described K bit indication domain information indication is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, the descending carrier set of described K bit indication domain information indication, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, the descending carrier set of described K bit indication domain information indication is the described former activation carrier wave of UE.

Preferably, correspondence is identical at descending carrier and/or the described indication information among the PDCCH in the descending sub frame that same sub-frame of uplink carries out the ACK/NACK feedback.

Preferably, pass through PDCCH in described base station, described indication information is sent to before the described UE, and the method also comprises: whether described base station supports to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback by the pre-configured described UE of high-level signaling;

When described high-level signaling disposed described UE and can adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback, described base station sent to described UE by PDCCH with described indication information.

Preferably, described high-level signaling is radio resource control RRC signaling or media access control MAC layer signaling.

Preferably, described PDCCH is the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release.

Correspondingly, in the UE side, referring to Fig. 4, the method for a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises step:

S201, user equipment (UE) obtain indication information by physical downlink control channel PDCCH, and wherein, described indication information is used to indicate the mode that described UE determines the ACK/NACK number of bits of feedback.

S202, described UE determine the ACK/NACK number of bits of feedback according to described indication information.

Preferably, described indication information is the indication of 1 bit among described PDCCH domain information, indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates.

Preferably, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, 1 bit indication domain information among the described PDCCH indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates;

In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the 1 bit indication domain information among the described PDCCH indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration.

Perhaps, described indication information is the indication of the K bit among described PDCCH domain information, and this information has been indicated a descending carrier set, is used for described UE and determines the ACK/NACK number of bits of feedback according to described descending carrier set, and wherein, K is the integer more than or equal to 1.

For TDD system:

It is preferably, corresponding that to carry out indication information described in the descending carrier of ACK/NACK feedback and/or the PDCCH in the descending sub frame at same sub-frame of uplink identical.

Preferably, pass through PDCCH at described UE, obtain before the indication information, the method also comprises: described UE receives high-level signaling, and whether described high-level signaling disposes described UE and support to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback;

When described high-level signaling configuration can adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback, by described PDCCH, obtain described indication information.

That is to say that the embodiment of the invention can be determined by PDCCH dynamic-configuration UE the mode of ACK/NACK number of bits of feedback in the LTE-A system, specifically can adopt following three kinds of methods:

Method one: by the indication of 1 bit among PDCCH domain information, indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates.

Wherein, described 1 bit indication domain information is reusing of original information field in Downlink Control Information (DCI, the Downlink Control Information) form (format) of PDCCH, perhaps the additional bit domain information for increasing newly.

Described PDCCH is the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling (SPS, Semi-Persistent Scheduling) resource release.

And 1 bit in same sub-frame of uplink carries out a plurality of descending sub frames on a plurality of descending carriers of ACK/NACK feedback among the PDCCH of (only have for each descending carrier of FDD system a descending sub frame corresponding with this sub-frame of uplink) indicates the domain information should be consistent; If inconsistent, UE can take one of following manner to process:

Mode one: UE can think to dispatch mistake, does not carry out the ACK/NACK feedback.

Mode two: according to the rule of making an appointment, in a plurality of PDCCH, select one, for example select first PDCCH or descending Allotment Serial Number (DAI, Downlink Assignment Index)=1 PDCCH, according to the indication of 1 bit among this PDCCH domain information, determine to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates.

Mode three: the descending carrier according to configuration is determined the ACK/NACK number of bits of feedback.

The state of the 1 bit indication domain information among the above-mentioned PDCCH and the corresponding relation of instruction content are as follows, for example, when 1 bit indication territory is " 1 ", indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier of configuration, when 1 bit indication territory was " 0 ", indication UE determined the ACK/NACK number of bits of feedback according to the descending carrier that activates; Perhaps, when 1 bit indication territory was " 0 ", indication UE determined the ACK/NACK number of bits of feedback according to the descending carrier of configuration, and when 1 bit indication territory was " 1 ", indication UE determined the ACK/NACK number of bits of feedback according to the descending carrier that activates.

Better, the descending carrier of UE is not being activated or period of deexcitation or reconfiguration operation, period after perhaps having determined the activation of UE descending carrier or deexcitation or reconfiguration operation come into force, when having downlink transfer, the base station should preferentially be determined the ACK/NACK number of bits of feedback by the indication of 1 bit among PDCCH territory indication UE according to the descending carrier that activates, to reduce the ACK/NACK number of bits of feedback, improve transmission performance;

In the period whether activation that can not determine the UE descending carrier or deexcitation or reconfiguration operation come into force, when having downlink transfer, the base station should preferentially be determined the ACK/NACK number of bits of feedback by the indication of 1 bit among PDCCH territory indication UE according to the descending carrier of configuration, to avoid UE and base station understanding differently of ACK/NACK number of bits of feedback is caused.

Method two: the descending carrier set of K bit indication domain information indication among the PDCCH, UE determines the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

Be that UE only feeds back ACK/NACK feedback information corresponding to descending carrier in this descending carrier set; Perhaps, UE only feeds back ACK/NACK feedback information corresponding to descending carrier the descending carrier in this descending carrier is gathered in all descending carriers of UE configuration.Wherein, base station and UE can make an appointment and adopt a kind of in these two kinds of corresponded manners.

Described K bit indication territory is reusing of original information field among the DCI format of PDCCH, perhaps the additional bit for increasing newly;

Described PDCCH is the PDCCH of dispatching downlink data, and/or the PDCCH of indication SPS resource release.

The K bit configuration information of carrying out among the PDCCH in a plurality of descending sub frames (only have for each descending carrier of FDD system a descending sub frame corresponding with this sub-frame of uplink) on a plurality of descending carriers of ACK/NACK feedback at same sub-frame of uplink should be consistent; If inconsistent, UE can take one of following manner to process:

Mode one: think to dispatch mistake, do not carry out the ACK/NACK feedback;

Mode two: rule is selected one in a plurality of PDCCH according to making an appointment, for example select the PDCCH of first PDCCH or selection DAI=1, according to the descending carrier set of the indication of the K bit among this PDCCH domain information indication, determine the ACK/NACK number of bits of feedback;

Better, for the FDD system, the descending carrier set of the K bit indication domain information indication among the PDCCH, should be and to carry out the set of the descending carrier of physical presence downlink data transmission (being the PDCCH transmission that PDSCH and/or indication SPS resource discharge) in the descending sub frame of ACK/NACK feedback at same sub-frame of uplink, to reduce the ACK/NACK number of bits of feedback, improve transmission performance.

Better, for the TDD system:

If the base station can determine which descending carrier to have the downlink data transmission that need to carry out at same sub-frame of uplink the ACK/NACK feedback in the individual descending sub frame of M (M is the integer more than or equal to 1) in the descending sub frame of first scheduling, the then descending carrier set of the indication of the K bit among PDCCH domain information indication, should be and to carry out the set of the descending carrier of physical presence downlink data transmission (being the PDCCH transmission that PDSCH and/or indication SPS resource discharge) in the descending carrier of ACK/NACK feedback and the descending sub frame at same sub-frame of uplink, to reduce the ACK/NACK number of bits of feedback, improve transmission performance;

Otherwise, the descending carrier of UE is not being activated or period of deactivating operation, period after perhaps having determined the activation of UE descending carrier or deexcitation or reconfiguration operation come into force, when having downlink transfer, the descending carrier set of the K bit indication domain information indication among the PDCCH, should be the descending carrier set that UE activates, to reduce the ACK/NACK number of bits of feedback, improve transmission performance; Within the fuzzy period whether activation that can not determine the UE descending carrier or deexcitation or reconfiguration operation come into force, when having downlink transfer, the descending carrier set of the K bit indication territory indication among the PDCCH, should be the descending carrier set of UE configuration, to avoid UE and base station understanding differently of ACK/NACK number of bits of feedback caused; Perhaps, within the fuzzy the period whether activation that can not judge the UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, the descending carrier set of the K bit indication domain information indication among the PDCCH, (this is because the base station is in case sent the deexcitation order to one or more descending carriers for the set of the descending carrier except the deactivating operation carrier wave in the former activation carrier wave of UE, even at the deexcitation Pending The Entry Into Force in period, downlink data transmission can not dispatched at this carrier wave in the base station yet), when activating one or more descending carrier, the descending carrier set of the K bit indication domain information indication among the PDCCH, (this is because before activating Pending The Entry Into Force for the former activation carrier set of UE, the base station can not send to these descending carrier dispatching downlink transfer of data of activation command), to reduce the ACK/NACK number of bits of feedback, improve transmission performance.

In the method two, according to the difference of indicating mode, can be divided into following two schemes again:

Scheme one: during a plurality of descending carriers of making an appointment by high-level signaling configuration or base station and UE in advance in K bit indication domain information indication base station are gathered one;

Wherein,

A is the descending carrier set number that the pre-configured or base station of high-level signaling and UE make an appointment;

The configuration of descending carrier set can be configured based on the descending carrier numbering.

Scheme two: adopt bitmap (bitmap) mode, whether the corresponding UE configuration of every bit or the descending carrier that activates in the K bit indication domain information indicate this descending carrier in the descending carrier set of PDCCH notice by this bit information;

Wherein, K=N, N are the descending carrier number of UE configuration or activation; Perhaps, change along with disposing or activate carrier number for fear of K, thereby cause the DCI length among the PDCCH to change, increase the UE blind check, also desirable K is fixed as 5, i.e. the present maximum polymerization carrier number of supporting of LTE-A.

The state of the K bit indication domain information among the above-mentioned PDCCH and the corresponding relation of instruction content are as follows, for example, when 1 bit of a corresponding descending carrier is " 1 " in the K bit, represent that this descending carrier is in the descending carrier set of PDCCH indication, during for " 0 ", expression is not in this descending carrier set; Perhaps, when 1 bit of a corresponding descending carrier is " 0 " in the K bit, represent this descending carrier in the descending carrier set of PDCCH indication, during for " 1 ", expression is not in this descending carrier set.

Method three: whether support to adopt PDCCH signaling dynamic-configuration UE to determine the mode of ACK/NACK number of bits of feedback by the pre-configured UE of high-level signaling; When high-level signaling configuration can adopt PDCCH signaling dynamic-configuration UE to determine the mode of ACK/NACK number of bits of feedback, the advice method of PDCCH was as described in above-mentioned method one or the method two.

Wherein, high-level signaling can be controlled for Radio Resource (RRC) signaling or media access control (MAC) layer signaling;

The corresponding relation of the mode whether pre-configured UE of above-mentioned high-level signaling supports to adopt PDCCH signaling dynamic-configuration UE to determine the ACK/NACK number of bits of feedback is as follows, for example, by 1 bit in the high-level signaling, be used for representing whether support to adopt PDCCH signaling dynamic-configuration UE to determine the mode of ACK/NACK number of bits of feedback, when this bit is " 1 ", to express support for, this bit represents not support when being " 0 ", when perhaps this bit is " 0 ", express support for, this bit represents not support when being " 1 ";

The bit field that is used to refer to the descending carrier of determining the ACK/NACK number of bits of feedback among the PDCCH, only effective when the support of higher level parameters configuration UE adopts the PDCCH signaling dynamic, to reduce blind check and the signaling consumption of PDCCH.

Above-mentioned each method is applicable to PUCCH and the transmission of the ACK/NACK on the PUSCH under FDD system and the TDD system.

Above-mentioned each method can be applied to the transmission of other information except ACK/NACK information equally.

The below provides the explanation of specific embodiment.

Embodiment 1: for the TDD system.

Suppose that descending carrier 1 is downlink main carrier to carry, UE has disposed 4 descending carriers, the descending carrier that is in state of activation has 3, be descending carrier 1,2 and 3, descending carrier 1 and 2 adopts the single codeword transmission mode, descending carrier 3 and 4 adopts many codeword transmission pattern, M=4, be that correspondence is 4 at the descending sub frame number that a sub-frame of uplink carries out the ACK/NACK feedback on each descending carrier, UE is configured to adopt PUCCHformat 3 transferring ACKs/nack message, then indicates UE which kind of mode to determine that the example of ACK/NACK number of bits of feedback is as follows according to:

Scene (1): in the non-fuzzy phase of not carrying out any carrier activation or deexcitation or reconfiguration operation;

Base station end: if calculate the ACK/NACK number of bits of feedback according to the descending carrier of configuration, then according to the transmission mode of 4 configurating downlink carrier waves and each descending carrier, UE need to feed back the ACK/NACK of 4+4+8+8=24 bit, the maximum transfer capacity that has surpassed PUCCH format3, therefore need to carry out the space to ACK/NACK and merge, then will cause unnecessary re-transmission; If calculate the ACK/NACK number of bits of feedback according to the descending carrier that activates, then according to 3 transmission modes that activate descending carrier and each descending carrier, UE need to feed back 4+4+8=16 bit ACK/NACK, not needing to carry out the space merges, can adopt the Dual-RM coded system that 16 bit ACK/NACK feedback information is transmitted, avoided merging, improved the ACK/NACK transmission availability, therefore the base station determines that indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier that activates, and concrete grammar is as follows:

Method A1 (corresponding said method one): will be in subframe n0 to n3 all scheduling Physical Downlink Shared Channels (PDSCH) of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or the 1 bit indication territory reset among the PDCCH that indication SPS resource discharges, expression indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier that activates, and sends to UE;

Method A2-1 (scheme one in the corresponding said method two): the pre-configured or base station of RRC signaling and UE A=4 the descending carrier set of having made an appointment, wherein, set 1={ descending carrier 1, descending carrier 2, descending carrier 3, descending carrier 4}, set 2={ descending carrier 1, descending carrier 2, descending carrier 3}, set 3={ descending carrier 1, descending carrier 2}, set 4={ descending carrier 1}.

Therefore need

The indication territory of bit, the corresponding relation in the indication territory of the K bit among descending carrier set and the PDCCH is shown in following table 2.

Because the descending carrier set that set 2 is present UE to be activated, be the base station will be in subframe n0 to n3 all scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or the K bit indication territory among the PDCCH that indication SPS resource discharges be set to " 01 ", send to UE, indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

The descending carrier set	K bit indication territory among the PDCCH
		Set 1	0 0
Set 2	0 1
		Set 3	1 0
Set 4	1 1

Table 2

Method A2-2 (scheme two in the corresponding said method two): the bitmap mode is adopted in the base station, UE has disposed 4 descending carriers, so K=4, this moment, 4 bits were indicated the descending carrier of the corresponding configuration of every bit in the territory, this bit reset represents that the descending carrier of this configuration does not comprise this carrier wave in gathering, set represents to comprise this carrier wave, be the base station will be in subframe n0 to n3 all scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission or the K bit indication territory among the PDCCH that indication SPS resource discharges be set to " 1110 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

Method A3 (corresponding said method three): the base station supports to adopt definite side of PDCCH dynamic-configuration ACK/NACK number of bits of feedback to show by the pre-configured UE of RRC signaling, is about to this indication bit set, sends to UE; Then, specifically indicate by PDCCH base station according to the method described above A1, A2-1 or A2-2, and the content of concrete indicating means is the same, does not give unnecessary details.

The UE end:

Method B1 (corresponding said method one): receive data on the descending carrier that activates, indicating domain information according to 1 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 0 ", determine to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates, be that UE only produces ACK/NACK information to descending carrier 1,2,3, as shown in Figure 5, and 16 bit ACK that will obtain/the NACK feedback information adopts the Dual-RM coded system to send to the base station;

Method B2-1 (scheme one in the corresponding said method two): receive data on the descending carrier that activates, indicating domain information according to the K=2 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 01 ", the descending carrier set of determining the base station configuration is set 2, and the sets definition relation that make an appointment in pre-configured or UE and base station according to the base station, determine to comprise in this set descending carrier 1,2,3, be that UE is only to descending carrier 1,2,3 produce ACK/NACK information, as shown in Figure 5, and 16 bit ACK that will obtain/the NACK feedback information adopts the Dual-RM coded system to send to the base station.

Method B2-2 (scheme two in the corresponding said method two): receive data on the descending carrier that activates, indicating domain information according to the K=4 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 1110 ", determine to comprise descending carrier 1,2,3 in the descending carrier set of base station configuration, be that UE only produces ACK/NACK information to descending carrier 1,2,3, as shown in Figure 5, and 16 bit ACK that will obtain/the NACK feedback information adopts the Dual-RM coded system to send to the base station.

Method B3 (corresponding said method three): whether effectively the ACK/NACK number of bits of feedback that at first receives among the configuration PDCCH indicates territory RRC signaling, be " 1 " according to this 1 bit RRC signaling, determine to support to adopt the ACK/NACK number of bits of feedback of PDCCH dynamic-configuration UE to determine mode, be to exist indication ACK/NACK number of bits of feedback to determine the bit field that mode is relevant among the PDCCH, UE further according to the method described above B1, B2-1 or B2-2 determine the ACK/NACK number of bits of feedback according to the indication domain information among the PDCCH, particular content is not given unnecessary details.

Scene (2): in the fuzzy phase of carrier wave deactivating operation.

Base station end: issue high-level signaling deexcitation descending carrier 3, within the unenforced time period of descending carrier 3 deexcitations, the base station can not determine whether 3 deexcitations of UE end descending carrier come into force, but during this period of time, downlink data transmission can not dispatched at descending carrier 3 in the base station, then indicates UE which kind of mode to determine that the example of ACK/NACK number of bits of feedback is as follows according to:

Method C1 (corresponding said method one): because in the unenforced pattern of carrier wave deexcitation in the period, the base station can't determine whether the deactivating operation of UE end carrier wave 3 comes into force, if determine that the ACK/NACK number of bits of feedback may exist to understand differently and cause problem according to activating carrier wave, cause for fear of understanding differently, the base station need indicate UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration, 1 bit indication territory set among the PDCCH that soon the scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or indication SPS resource will discharge in subframe n0 to n3, expression indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier of configuration, and sends to UE; At this moment, the base station determines that according to the descending carrier of UE configuration and the transmission mode of each descending carrier the number of bits of feedback of UE is 24 bits, surpass 20 bits, therefore determine further that UE carries out the space to many code words and merges, the ACK/NACK number of bits of feedback of namely determining the actual transmission of UE is 16 bits, adopts the Dual-RM coded system.

Method C2 (corresponding said method two): whether come into force although the deexcitation of descending carrier 3 can't be judged in the base station, but the base station is transmitting downlink data on descending carrier 3 during this period of time not, therefore, in order to reduce the ACK/NACK number of bits of feedback, improve transmission performance, the base station can indicate UE only to determine the ACK/NACK number of bits of feedback according to the descending carrier 1 that activates and 2, and concrete indicating means is as follows:

Method C2-1 (scheme one in the corresponding said method two): 4 descending carriers that the pre-configured or base station of RRC signaling and UE make an appointment are gathered same scene (1), corresponding relation is as shown in table 2, give UE with the indication bit territory indicating downlink carrier set 3 among the PDCCH, be the base station will be in subframe n0 to n3 all scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission or the K bit indication territory among the PDCCH that indication SPS resource discharges be set to " 10 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

Method C2-2 (scheme two in the corresponding said method two): the bitmap mode is adopted in the base station, UE has disposed 4 descending carriers, so K=4, this moment, 4 bits were indicated the descending carrier of the corresponding configuration of every bit in the territory, this bit reset represents that the descending carrier of this configuration does not comprise this carrier wave in gathering, set represents to comprise this carrier wave, be the base station will be in subframe n0 to n3 all scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or the K bit indication territory among the PDCCH that indication SPS resource discharges be set to " 1100 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

Method C3 (corresponding said method three): the base station is about to this indication bit set by definite mode of the pre-configured UE support of RRC signaling employing PDCCH dynamic-configuration ACK/NACK number of bits of feedback, sends to UE; Then the base station according to the method described above C1, C2-1, C2-2 specifically indicate definite mode of ACK/NACK number of bits of feedback by PDCCH, concrete indicating means content is the same, does not give unnecessary details.

The UE end:

Method D1 (corresponding said method one): receive data on the descending carrier that activates, indicating domain information according to 1 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 1 ", determine to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration, be that UE needs the descending carrier of all configurations is produced ACK/NACK information, descending carrier and the descending sub frame that does not receive data produced nack message, because the ACK/NACK bit number that UE need to feed back is 4+4+8+8=24, need to carry out the space to many code words merges, as shown in Figure 6, then 16 bit ACK that obtain after will merging of UE/NACK feedback information adopts PUCCH format 3 Dual-RM coded systems to send to the base station;

Method D2-1 (scheme one in the corresponding said method two): receive data on the descending carrier that activates, indicating domain information according to the K=2 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 10 ", the descending carrier set of determining the base station configuration is set 3, and the sets definition relation that make an appointment in pre-configured or UE and base station according to the base station, determine to comprise in this set descending carrier 1 and 2, be that UE only produces ACK/NACK information to descending carrier 1 and 2, as shown in Figure 7, and 8 bit ACK that will obtain/the NACK feedback information adopts PUCCH format 3RM coded system to send to the base station;

Method D2-2 (scheme two in the corresponding said method two): receive data on the descending carrier that activates, indicating domain information according to the K=4 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 1100 ", determine to comprise descending carrier 1 and 2 in the descending carrier set of base station configuration, be that UE only produces ACK/NACK information to descending carrier 1 and 2, as shown in Figure 7, and 8 bit ACK that will obtain/the NACK feedback information adopts the RM coded system to send to the base station;

Method D3 (corresponding said method three): whether effectively the ACK/NACK number of bits of feedback that at first receives among the configuration PDCCH indicates territory RRC signaling, be " 1 " according to this 1 bit RRC signaling, determine to support to adopt the ACK/NACK number of bits of feedback of PDCCH dynamic-configuration UE to determine mode, be to exist indication ACK/NACK number of bits of feedback to determine the bit field that mode is relevant among the PDCCH, UE further according to the method described above D1, D2-1 or D2-2 determine the ACK/NACK number of bits of feedback according to the indication territory among the PDCCH, particular content is not given unnecessary details.

Scene (3): in the fuzzy phase of carrier activation operation.

Base station end: issue high-level signaling and activate descending carrier 4, activate in the unenforced time period at descending carrier 4, the base station can not determine whether 4 activation of UE end descending carrier come into force, but during this period of time, downlink data transmission can not dispatched at descending carrier 4 in the base station, then indicates UE which kind of mode to determine that the example of ACK/NACK number of bits of feedback is as follows according to:

Method E1 (corresponding said method one): because in the unenforced pattern of carrier wave deexcitation in the period, the base station can't determine whether the activation manipulation of UE end carrier wave 4 comes into force, if determine that the ACK/NACK number of bits of feedback may exist to understand differently and cause problem according to activating carrier wave, cause for fear of understanding differently, the base station needs configuration UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration, 1 bit indication territory set among the PDCCH that soon the scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or indication SPS resource will discharge in subframe n0 to n3, the expression configuration UE is determined the ACK/NACK number of bits of feedback according to the descending carrier of configuration, and sends to UE; At this moment, the base station determines that according to the descending carrier of UE configuration and the transmission mode of each descending carrier the number of bits of feedback of UE is that 24 bits surpass 20 bits, therefore determine further that UE carries out the space to many code words and merges, the ACK/NACK number of bits of feedback of namely determining the actual transmission of UE is 16 bits, adopts the Dual-RM coded system.

Method E2 (corresponding said method two): whether come into force although the activation of descending carrier 4 can't be judged in the base station, but the base station is transmitting downlink data on descending carrier 4 during this period of time not, therefore, in order to reduce the ACK/NACK number of bits of feedback, improve transmission performance, the base station can indicate UE only to determine the ACK/NACK number of bits of feedback according to the descending carrier 1,2 and 3 of former activation, and concrete indicating means is as follows:

Method E2-1 (scheme one in the corresponding said method two): 4 descending carriers that the pre-configured or base station of RRC signaling and UE make an appointment are gathered same scene (1), corresponding relation is as shown in table 2, give UE with the indication bit territory indicating downlink carrier set 2 among the PDCCH, be the base station will be in subframe n0 to n3 all scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or the K bit indication territory among the PDCCH that indication SPS resource discharges be set to " 01 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set;

Method E2-2 (scheme two in the corresponding said method two): the bitmap mode is adopted in the base station, UE has disposed 4 descending carriers, so K=4, this moment, 4 bits were indicated the descending carrier of the corresponding configuration of every bit in the territory, this bit reset represents that the descending carrier of this configuration does not comprise this carrier wave in gathering, set represents to comprise this carrier wave, be the base station will be in subframe n0 to n3 all scheduling PDSCH of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission and/or the K bit indication territory among the PDCCH that indication SPS resource discharges be set to " 1110 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set;

Method E3 (corresponding said method three): the base station is about to this indication bit set by definite method of the pre-configured UE support of RRC signaling employing PDCCH dynamic-configuration ACK/NACK number of bits of feedback, sends to UE; Then the base station according to the method described above E1, E2-1, E2-2 specifically indicate definite method of ACK/NACK number of bits of feedback by PDCCH, concrete indicating means content is the same, does not give unnecessary details;

The UE end:

Method F1 (corresponding said method one): receive data on the descending carrier that activates, indicating domain information according to 1 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 1 ", determine to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration, be that UE needs the descending carrier of all configurations is produced ACK/NACK information, descending carrier and the descending sub frame that does not receive data produced NACK, because the ACK/NACK bit number that UE need to feed back is 4+4+8+8=24, need to carry out the space to many code words merges, as shown in Figure 6, then 16 bit ACK that obtain after will merging of UE/NACK feedback information adopts PUCCH format 3Dual-RM coded system to send to the base station;

Method F2-1 (scheme one in the corresponding said method two): receive data on the descending carrier that activates, indicating domain information according to the K=2 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 01 ", the descending carrier set of determining the base station configuration is set 2, and the sets definition relation that make an appointment in pre-configured or UE and base station according to the base station, determine to comprise in this set descending carrier 1,2 and 3, be that UE is only to descending carrier 1,2 and 3 produce ACK/NACK information, as shown in Figure 5, and 16 bit ACK that will obtain/the NACK feedback information adopts PUCCH format 3RM coded system to send to the base station.

Method F2-2 (scheme two in the corresponding said method two): receive data on the descending carrier that activates, indicating domain information according to the K=4 bit among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource is " 1110 ", determine to comprise descending carrier 1,2 and 3 in the descending carrier set of base station configuration, be that UE only produces ACK/NACK information to descending carrier 1,2 and 3, as shown in Figure 5, and 16 bit ACK that will obtain/the NACK feedback information adopts the RM coded system to send to the base station.

Method F3 (corresponding said method three): whether effectively the ACK/NACK number of bits of feedback that at first receives among the configuration PDCCH indicates territory RRC signaling, be " 1 " according to this 1 bit RRC signaling, determine to support to adopt the ACK/NACK number of bits of feedback of PDCCH dynamic-configuration UE to determine method, be to exist indication ACK/NACK number of bits of feedback to determine the bit field that mode is relevant among the PDCCH, UE further according to the method described above F1, F2-1 or F2-2 determine the ACK/NACK number of bits of feedback according to the indication territory among the PDCCH, particular content is not given unnecessary details.

Embodiment 2: for the FDD system.

Suppose that descending carrier 1 is downlink main carrier to carry, UE has disposed 4 descending carriers, the descending carrier that is in state of activation has 3, be descending carrier 1,2 and 3, all descending carriers all are many codeword transmission pattern, downlink data transmission has only been dispatched at descending carrier 1 and 2 in the base station in current descending sub frame, UE is configured to adopt PUCCH format 1b with channel selection transferring ACK/nack message, then indicates UE which kind of mode to determine that the example of ACK/NACK number of bits of feedback is as follows according to:

The base station end:

When adopting said method for the moment, be divided into following scene:

Scene (1): in the non-fuzzy phase of not carrying out any carrier activation or deexcitation or reconfiguration operation, if the descending carrier according to configuration calculates the ACK/NACK number of bits of feedback, then according to the transmission mode of 4 configurating downlink carrier waves and each descending carrier, UE need to feed back 2+2+2+2=8 bit ACK/NACK, the maximum transfer capacity that has surpassed PUCCH format1b with channel selection, therefore need to carry out the space to ACK/NACK merges, adopt channel selection to transmit the ACK/NACK that 4 bits merge, this will cause unnecessary re-transmission; If calculate the ACK/NACK number of bits of feedback according to the descending carrier that activates, then according to 3 transmission modes that activate descending carrier and each descending carrier, UE need to feed back 2+2+2=6 bit ACK/NACK, need to carry out equally the space and merge, adopt channel selection to transmit the ACK/NACK that 3 bits merge; As seen, no matter determine ACK/NACK number of bits of feedback based on descending carrier or the descending carrier that activates of configuration this moment, all can not avoid the space to merge, therefore the configurable UE in base station determines the ACK/NACK number of bits of feedback according to any mode in this dual mode, consider that perhaps the definite ACK/NACK number of bits of feedback of activation descending carrier is less, transmission performance is good than 4 bits, the base station also can be indicated according to the descending carrier that activates and be determined the ACK/NACK number of bits of feedback, the for example 1 bit indication territory reset among the PDCCH that will discharge in all scheduling PDSCH and/or the indication SPS resource of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission of base station, the expression configuration UE is determined the ACK/NACK number of bits of feedback according to the descending carrier that activates, and sends to UE;

Scene (2): the fuzzy phase of carrier activation or deactivating operation, high-level signaling deexcitation descending carrier 3 for example, within the deexcitation Pending The Entry Into Force time, the base station can not judge that descending carrier 3 holds whether deexcitation at UE, therefore may exist base station and UE to cause activating understanding differently of carrier number, therefore the ACK/NACK number of bits of feedback can not be determined (avoiding understanding differently of number of bits of feedback to cause) based on activating carrier wave, can only determine based on the descending carrier of configuration, it is the 1 bit indication territory set among the PDCCH that will discharge in all scheduling PDSCH and/or the indication SPS resource of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission of base station, expression indication UE determines the ACK/NACK number of bits of feedback according to the descending carrier of configuration, and sends to UE.

When method two is adopted in the base station: consider that the method can notify descending carrier set of UE, and in fact the base station can determine which descending carrier to have downlink data transmission in current descending sub frame, in order to reduce the ACK/NACK number of bits of feedback, avoid ACK/NACK to merge, no matter whether be in the fuzzy phase of carrier activation or deexcitation, the base station all can indicate UE only to determine the ACK/NACK number of bits of feedback according to the descending carrier with transfer of data, be only to determine the ACK/NACK number of bits of feedback according to descending carrier 1 and 2 among this embodiment, do not need the ACK/NACK feedback information is carried out any union operation this moment, to improve efficiency of transmission, avoid unnecessary re-transmission, concrete grammar is as follows:

Method G2-1 (scheme one in the corresponding said method two): the pre-configured or base station of RRC signaling and UE A=4 the descending carrier set of having made an appointment with embodiment 1, therefore needs

Bit, each set is as shown in table 2 with the corresponding relation in PDCCH signaling indicating territory; Because set 3 is the descending carrier set of physical presence downlink data transmission, be that K bit indication territory among the PDCCH that will discharge in all scheduling PDSCH and/or the indication SPS resource of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission of base station is set to " 10 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

Method G2-2 (scheme two in the corresponding said method two): the bitmap mode is adopted in the base station, UE has disposed 4 descending carriers, so K=4, this moment, 4 bits were indicated the descending carrier of the corresponding configuration of every bit in the territory, this bit reset represents that the descending carrier of this configuration does not comprise this carrier wave in gathering, set represents to comprise this carrier wave, be that K bit indication territory among the PDCCH that will discharge in all scheduling PDSCH and/or the indication SPS resource of all descending carriers (only having the descending carrier of activation to have transfer of data) transmission of base station is set to " 1100 ", send to UE, indicate it to determine the ACK/NACK number of bits of feedback according to the descending carrier in this descending carrier set.

When base station employing method three: definite method of PDCCH dynamic-configuration ACK/NACK number of bits of feedback is supported to adopt by the pre-configured UE of RRC signaling in the base station, is about to this indication bit set, sends to UE; Then the base station can be according to the method described above 1, G2-1, G2-2 specifically indicate definite method of ACK/NACK number of bits of feedback by PDCCH, and concrete indicating means content is the same, does not give unnecessary details;

The UE end:

Method H1 (corresponding said method one): receive data on the descending carrier that activates, according to the 1 bit indication domain information among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource, determine to determine the ACK/NACK number of bits of feedback according to configuration or the descending carrier that activates, be divided into following scene:

Scene (1): the non-fuzzy phase of not carrying out any carrier activation or deexcitation or reconfiguration operation, UE is " 0 " according to the 1 bit indication domain information among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource, determine to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates, be that UE is to descending carrier 1,2 and 3 produce ACK/NACK information, and many code words descending carrier is carried out the space merge, obtain 3 bit feedback information, as shown in Figure 8, and according to the mapping form of 3 bit ACK/NACK, adopt channel selection scheme to transmit this 3 bit ACK/NACK feedback information.

Scene (2): the fuzzy phase of carrier activation or deactivating operation, for example during high-level signaling deexcitation descending carrier 3, UE is " 1 " according to the 1 bit indication domain information among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource, determine to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration, be that UE produces ACK/NACK information to all descending carriers, and many code words descending carrier is carried out the space merge, obtain 4 bit feedback information, as shown in Figure 9, and according to the mapping form of 4 bit ACK/NACK, adopt channel selection scheme to transmit this 4 bit ACK/NACK feedback information.

Method H2-1 (scheme one in the corresponding said method two): receive data on the descending carrier that activates, no matter whether in the fuzzy phase content of carrier activation or deexcitation, UE is " 10 " according to the K=2 bit indication domain information among the PDCCH of all scheduling PDSCH that transmit on it and/or the release of indication SPS resource, the descending carrier set of determining the base station configuration is set 3, and the sets definition relation that make an appointment in pre-configured or UE and base station according to the base station, determine to comprise in this set descending carrier 1 and 2, be that UE only produces ACK/NACK information to descending carrier 1 and 2, do not need the ACK/NACK feedback information is carried out any merging, obtain 4 bit feedback information, as shown in figure 10, and according to the mapping form of 4 bit ACK/NACK, adopt channel selection scheme to transmit this 4 bit ACK/NACK feedback information.

Method H2-2 (scheme two in the corresponding said method two): receive data on the descending carrier that activates, no matter whether in the fuzzy phase content of carrier activation or deexcitation, UE is " 1100 " according to the K=4 bit indication domain information among the PDCCH of all scheduling PDSCH that transmit on it or the release of indication SPS resource, determine to comprise descending carrier 1 and 2 in the descending carrier set of base station configuration, be that UE only produces ACK/NACK information to descending carrier 1 and 2, do not need the ACK/NACK feedback information is carried out any merging, obtain 4 bit feedback information, as shown in figure 10, and according to the mapping form of 4 bit ACK/NACK, adopt channel selection scheme to transmit this 4 bit ACK/NACK feedback information.

Method H3 (corresponding said method three): whether effectively the ACK/NACK number of bits of feedback that at first receives among the configuration PDCCH indicates territory RRC signaling, be " 1 " according to this 1 bit RRC signaling, determine to support to adopt the ACK/NACK number of bits of feedback of PDCCH dynamic-configuration UE to determine method, be to exist indication ACK/NACK number of bits of feedback to determine the bit field that mode is relevant among the PDCCH, further H1, H2-1 or H2-2 are according to the acquisition of the indication territory among PDCCH configuration information according to the method described above for UE, and particular content is not given unnecessary details.

Referring to Figure 11, in base station side, the indicating device of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises:

Indication information determining unit 101 is used for determining indication information that wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback;

Indication information transmitting element 102 is used for by physical downlink control channel PDCCH described indication information being sent to described UE.

Preferably, described indication information transmitting element 102 by the indication of 1 bit among described PDCCH domain information, indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates.

Preferably, described indication information transmitting element 102, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates; In the period whether activation of not determining the described E descending carrier of U or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration.

Preferably, described indication information transmitting element 102 is by the indication of the K bit among described PDCCH domain information, indicate a descending carrier set, be used for described UE and determine the ACK/NACK number of bits of feedback according to described descending carrier set, wherein, K is the integer more than or equal to 1.

Preferably, described indication information transmitting element 102, the described K bit indication domain information of transmission, a descending carrier in a plurality of descending carriers set of making an appointment by high-level signaling configuration or base station and described UE in advance in the indication base station is gathered; Perhaps,

Described indication information transmitting element 102, the descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information of transmission.

Preferably,

For FDD system, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element 102 sends is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink;

For TDD system:

The descending carrier set of the described K bit indication domain information indication that described indication information transmitting element 102 sends is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps,

The descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element 102 sends is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element 102 sends is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element 102 sends, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element 102 sends is the described former activation carrier wave of UE.

Preferably, described indication information transmitting element 102, it is corresponding that to carry out the described indication information that sends among the descending carrier of ACK/NACK feedback and/or the PDCCH in the descending sub frame at same sub-frame of uplink identical.

Preferably, this device also comprises:

High-level signaling dispensing unit 103, be used for passing through PDCCH at described indication information transmitting element, described indication information is sent to before the described UE, whether support to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback by the pre-configured described UE of high-level signaling;

Described indication information transmitting element 102 when the described UE of described high-level signaling dispensing unit 103 configurations can adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback, by PDCCH, sends to described UE with described indication information.

Preferably, described high-level signaling dispensing unit 103, the described high-level signaling of transmission is radio resource control RRC signaling or media access control MAC layer signaling.

Preferably, described indication information transmitting element 102, by the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release, described indication information is sent to described UE.

Preferably, the indicating device of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides is the base station.

Referring to Figure 12, in the UE side, the device of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides comprises:

Indication information acquiring unit 201 is used for obtaining indication information by physical downlink control channel PDCCH, and wherein, described indication information is used to indicate the mode that user equipment (UE) is determined the ACK/NACK number of bits of feedback;

Determining unit 202 is used for described UE according to described indication information, determines the ACK/NACK number of bits of feedback.

Preferably, the described indication information that described indication information acquiring unit 201 obtains is the indication of 1 bit among described PDCCH domain information, indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates.

Preferably, described indication information acquiring unit 201, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, 1 bit indication domain information among the described PDCCH that obtains indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the 1 bit indication domain information among the described PDCCH that obtains indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration.

Perhaps, described indication information acquiring unit 201, the described indication information that obtains, be the indication of the K bit among described PDCCH domain information, this information has been indicated a descending carrier set, be used for described UE and determine the ACK/NACK number of bits of feedback according to described descending carrier set, wherein, K is the integer more than or equal to 1.

Preferably, described indication information acquiring unit 201, the described K bit that obtains indication domain information has indicated a descending carrier in a plurality of descending carriers set that the base station makes an appointment by high-level signaling configuration or base station and described UE in advance to gather; Perhaps,

Described indication information acquiring unit 201, the descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information that obtains.

Preferably,

For FDD system, described indication information acquiring unit 201, the descending carrier set of the described K bit indication domain information indication of obtaining is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink;

For TDD system:

Described indication information acquiring unit 201, the descending carrier set of the described K bit that obtains indication domain information indication is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps,

The descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, described indication information acquiring unit 201, the descending carrier set of the described K bit indication domain information indication of obtaining is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, described indication information acquiring unit 201, the descending carrier set of the described K bit indication domain information indication of obtaining is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, described indication information acquiring unit 201, the descending carrier set of the described K bit indication domain information indication of obtaining, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, described indication information acquiring unit 201, the descending carrier set of the described K bit indication domain information indication of obtaining is the described former activation carrier wave of UE.

Preferably, described indication information acquiring unit 201, it is corresponding that to carry out the indication information that obtains among the descending carrier of ACK/NACK feedback and/or the PDCCH in the descending sub frame at same sub-frame of uplink identical.

Preferably, this device also comprises:

High-level signaling receiving element 203, be used for passing through PDCCH at described indication information acquiring unit, obtain before the indication information, receive high-level signaling, whether described high-level signaling configuration UE supports to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback;

Described indication information acquiring unit 201, when the described high-level signaling configuration of described high-level signaling receiving element 203 receptions can adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback, by described PDCCH, obtain described indication information.

Preferably, the described high-level signaling that described high-level signaling receiving element 203 receives is radio resource control RRC signaling or media access control MAC layer signaling.

Preferably, described indication information acquiring unit 201, by the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release, obtain described indication information.

Preferably, the device of a kind of definite ACK/NACK number of bits of feedback that the embodiment of the invention provides is UE.

In sum, the embodiment of the invention has provided the scheme which descending carrier to determine the ACK/NACK number of bits of feedback in a kind of LTE-A system by PDCCH dynamic-configuration UE according to, avoiding UE and base station the ACK/NACK number of bits of feedback to be understood differently on the basis that causes, reduce as far as possible the ACK/NACK number of bits of feedback, avoid ACK/NACK to merge, improve ACK/NACK transmission reliability and system's retransmission efficiency.

Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.

The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device of the function that is used for being implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. the indicating means of a definite positive acknowledgement ACK/ Negative Acknowledgement NACK number of bits of feedback is characterized in that the method comprises:

Described base station indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates by the indication of 1 bit in physical downlink control channel PDCCH domain information; Perhaps, a descending carrier set is indicated by the indication of the K bit among described PDCCH domain information in described base station, is used for described UE and determines the ACK/NACK number of bits of feedback according to described descending carrier set, and wherein, K is the integer more than or equal to 1;

Wherein, described base station is by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates, comprise: the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration;

Perhaps, described base station is by the indication of the K bit among described PDCCH domain information, indicate a descending carrier set, be used for described UE and determine the ACK/NACK number of bits of feedback according to described descending carrier set, comprise: described K bit indication domain information, indicate a descending carrier in a plurality of descending carriers set that described base station makes an appointment by high-level signaling configuration or described base station and described UE in advance to gather; Perhaps, the descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information; Perhaps, for FDD system, the descending carrier set of described K bit indication domain information indication is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, for TDD system: the descending carrier set of described K bit indication domain information indication, for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of described K bit indication domain information indication is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of described K bit indication domain information indication is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, the descending carrier set of described K bit indication domain information indication, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, the descending carrier set of described K bit indication domain information indication is the described former activation carrier wave of UE.

2. method according to claim 1 is characterized in that, correspondence is identical at descending carrier and/or the described indication information among the PDCCH in the descending sub frame that same sub-frame of uplink carries out the ACK/NACK feedback.

3. method according to claim 1, it is characterized in that, pass through PDCCH in described base station, described indication information is sent to before the described UE, and the method also comprises: whether described base station supports to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback by the pre-configured described UE of high-level signaling;

4. method according to claim 3 is characterized in that, described high-level signaling is radio resource control RRC signaling or media access control MAC layer signaling.

5. method according to claim 1 is characterized in that, described PDCCH is the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release.

6. the method for a definite positive acknowledgement ACK/ Negative Acknowledgement NACK number of bits of feedback is characterized in that the method comprises:

When described indication information was 1 bit indication domain information among the described PDCCH, UE determined the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates; Perhaps, described indication information is the K bit indication domain information among the described PDCCH, and when this information had been indicated a descending carrier set, UE determined the ACK/NACK number of bits of feedback according to described descending carrier set, and wherein, K is the integer more than or equal to 1;

Wherein, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, 1 bit indication domain information among the described PDCCH indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the 1 bit indication domain information among the described PDCCH indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration;

Perhaps, described indication information is the K bit indication domain information among the described PDCCH, when this information has been indicated a descending carrier set, UE determines the ACK/NACK number of bits of feedback according to described descending carrier set, comprise: a descending carrier in a plurality of descending carriers set that described K bit indication domain information, indication base station are made an appointment by high-level signaling configuration or base station and described UE is in advance gathered; Perhaps, the descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information; Perhaps, for FDD system, the descending carrier set of described K bit indication domain information indication is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, for TDD system: the descending carrier set of described K bit indication domain information indication, for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of described K bit indication domain information indication is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of described K bit indication domain information indication is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, the descending carrier set of described K bit indication domain information indication, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, the descending carrier set of described K bit indication domain information indication is the described former activation carrier wave of UE.

7. method according to claim 6 is characterized in that, corresponding to carry out indication information described in the descending carrier of ACK/NACK feedback and/or the PDCCH in the descending sub frame at same sub-frame of uplink identical.

8. according to method claimed in claim 6, it is characterized in that, pass through PDCCH at described UE, obtain before the indication information, the method also comprises: described UE receives high-level signaling, and whether described high-level signaling disposes described UE and support to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback;

9. method according to claim 8 is characterized in that, described high-level signaling is radio resource control RRC signaling or media access control MAC layer signaling.

10. method according to claim 6 is characterized in that, described PDCCH is the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release.

11. the indicating device of a definite positive acknowledgement ACK/ Negative Acknowledgement NACK number of bits of feedback is characterized in that this device comprises:

The indication information transmitting element, be used for passing through physical downlink control channel PDCCH, the indication of 1 bit among described PDCCH domain information is sent to described UE, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates; Perhaps, be used for by described PDCCH, give described UE with the indication of the K bit among described PDCCH domain information, indicate a descending carrier set, described UE determines the ACK/NACK number of bits of feedback according to described descending carrier set, and wherein, K is the integer more than or equal to 1;

Wherein, described indication information transmitting element, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, by the indication of 1 bit among described PDCCH domain information, indicate described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration;

Perhaps, the described K bit indication domain information that described indication information transmitting element sends, a descending carrier in a plurality of descending carriers set of making an appointment by high-level signaling configuration or base station and described UE in advance in the indication base station is gathered; Perhaps, the descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information that described indication information transmitting element sends; Perhaps, for FDD system, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element sends is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, for TDD system: the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element sends, for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element sends is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element sends is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element sends, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, the descending carrier set of the described K bit indication domain information indication that described indication information transmitting element sends is the described former activation carrier wave of UE.

12. device according to claim 11 is characterized in that, described indication information transmitting element, and it is corresponding that to carry out the described indication information that sends among the descending carrier of ACK/NACK feedback and/or the PDCCH in the descending sub frame at same sub-frame of uplink identical.

13. device according to claim 11 is characterized in that, this device also comprises:

The high-level signaling dispensing unit, be used for passing through PDCCH at described indication information transmitting element, described indication information is sent to before the described UE, whether support to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback by the pre-configured described UE of high-level signaling;

Described indication information transmitting element when described high-level signaling dispensing unit disposes described UE and can adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback, by PDCCH, sends to described UE with described indication information.

14. device according to claim 13 is characterized in that, described high-level signaling dispensing unit, and the described high-level signaling of transmission is radio resource control RRC signaling or media access control MAC layer signaling.

15. device according to claim 11 is characterized in that, described indication information transmitting element, and by the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release, described indication information is sent to described UE.

16. the device of a definite positive acknowledgement ACK/ Negative Acknowledgement NACK number of bits of feedback is characterized in that this device comprises:

The indication information acquiring unit is used for obtaining indication information by physical downlink control channel PDCCH; Wherein, described indication information is the 1 bit indication domain information among the described PDCCH, is used to indicate described user equipment (UE) and determines the ACK/NACK number of bits of feedback according to the descending carrier of configuration or according to the descending carrier that activates; Perhaps, described indication information is the K bit indication domain information among the described PDCCH, and this information has been indicated a descending carrier set, is used for described UE and determines the ACK/NACK number of bits of feedback according to described descending carrier set, and wherein, K is the integer more than or equal to 1;

Determining unit is used for described UE according to described indication information, determines the ACK/NACK number of bits of feedback;

Wherein, described indication information acquiring unit, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps, period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, 1 bit indication domain information among the described PDCCH that obtains indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier that activates; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, the 1 bit indication domain information among the described PDCCH that obtains indicates described UE to determine the ACK/NACK number of bits of feedback according to the descending carrier of configuration;

Perhaps, described K bit indication domain information that described indication information acquiring unit obtains has indicated a descending carrier in a plurality of descending carriers set that the base station makes an appointment by high-level signaling configuration or base station and described UE in advance to gather; Perhaps, the descending carrier of the corresponding described UE configuration of every bit information or activation is used to indicate the descending carrier set whether this descending carrier belongs to described PDCCH notice in the described K bit indication domain information that described indication information acquiring unit obtains; Perhaps, for FDD system, described indication information acquiring unit, the descending carrier set of the described K bit that obtains indication domain information indication is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, for TDD system: described indication information acquiring unit, the descending carrier set of the described K bit indication domain information indication of obtaining is for correspondence is carried out the descending carrier of physical presence downlink data transmission in the descending sub frame of ACK/NACK feedback at current sub-frame of uplink; Perhaps, the descending carrier of described UE is not being activated or period of deexcitation or reconfiguration operation, perhaps period after having determined the activation of described UE descending carrier or deexcitation or reconfiguration operation come into force, described indication information acquiring unit, the descending carrier set of the described K bit indication domain information indication of obtaining is the descending carrier of described UE activation; In the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, described indication information acquiring unit, the descending carrier set of the described K bit indication domain information indication of obtaining is the descending carrier of described UE configuration; Perhaps, in the period whether activation of not determining described UE descending carrier or deexcitation or reconfiguration operation come into force, when the one or more descending carrier of deexcitation, described indication information acquiring unit, the descending carrier set of the described K bit indication domain information indication of obtaining, be the descending carrier except described deactivating operation carrier wave in the former activation carrier wave of described UE, when activating one or more descending carrier, described indication information acquiring unit, the descending carrier set of the described K bit indication domain information indication of obtaining is the described former activation carrier wave of UE.

17. device according to claim 16 is characterized in that, described indication information acquiring unit, and it is corresponding that to carry out the indication information that obtains among the descending carrier of ACK/NACK feedback and/or the PDCCH in the descending sub frame at same sub-frame of uplink identical.

18. device according to claim 16 is characterized in that, this device also comprises:

The high-level signaling receiving element, be used for passing through PDCCH at described indication information acquiring unit, obtain before the indication information, receive high-level signaling, whether described high-level signaling disposes described UE and supports to adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback;

Described indication information acquiring unit when the described high-level signaling configuration of described high-level signaling receiving element reception can adopt the described UE of PDCCH signaling dynamic-configuration to determine the mode of ACK/NACK number of bits of feedback, by described PDCCH, obtains described indication information.

19. device according to claim 18 is characterized in that, the described high-level signaling that described high-level signaling receiving element receives is radio resource control RRC signaling or media access control MAC layer signaling.

20. device according to claim 16 is characterized in that, described indication information acquiring unit, and by the PDCCH of dispatching downlink data, and/or the PDCCH of indication semi-continuous scheduling SPS resource release, obtain described indication information.