Embodiment
In order to transmit the implementation of a plurality of HARQ acknowledge messages in the carrier aggregation system that provides LTE at a sub-frame of uplink, the embodiment of the invention provides the feedback method of HARQ acknowledge message in the carrier aggregation system, in the method, at first be identified for feeding back the sub-frame of uplink of SR, UE transmits a plurality of HARQ acknowledge message signals to be feedback on this sub-frame of uplink.
Be explained in detail to the main realization principle of technical solution of the present invention, specific implementation process and to the beneficial effect that should be able to reach below in conjunction with Figure of description and specific embodiment, below in the narration, the HARQ acknowledge message represents with ACK/NACK, wherein, ACK and NACK be or/and relation, and in the practical application, the HARQ acknowledge message may also comprise DTX.
In the feedback method of the ACK/NACK that first embodiment of the invention provides, UE transmits a plurality of ack/nack signals to be feedback at the sub-frame of uplink that is used for feedback SR, and when UE has SR, specifies feedback signal in the up channel transmission that is used for feedback SR.Specifically as shown in Figure 3, this feedback method comprises the steps:
Step 301, judge whether the subframe of current data to be transmitted is the SR subframe, if judge and be, then execution in step 302, otherwise execution in step 304.
In this step, the SR subframe is definite sub-frame of uplink that is used for feedback SR of cycle of the feedback SR of UE configuration according to system namely, and for example, system is that the cycle of the feedback SR of UE configuration is 20us, and corresponding subframe is the SR subframe when this cycle arrives.
Step 302, judge whether UE needs to network side feedback SR, if judge and be, then execution in step 303, otherwise execution in step 304.
Step 303, transmit feedback signal for the up channel that is used for feedback SR that this UE distributes in advance in system.
Because receiving terminal is detecting only detect when whether UE has SR whether the signal transmission is arranged in the corresponding up channel, therefore, in this step, when UE had SR, the feedback signal that only need to transmit appointment in the up channel of correspondence got final product.
Step 304, use the method for systemic presupposition to feed back a plurality of ack/nack signals, signal transmission not in up channel corresponding to SR.
In this step, the method for systemic presupposition comprises:
Rule according to systemic presupposition is identified for transmitting the up channel of specifying ACK/NACK, and one of regulation specifies ack/nack signal to a up channel should be arranged in this systemic presupposition rule.Particularly, can be identified for according to the occupancy of each down control channel resources the up channel of transferring ACK/NACK;
Then as required a plurality of ACK/NACK are carried out preliminary treatment, for example, if the number of ACK/NACK is greater than setting threshold (this threshold value is the quantity of the ACK/NACK that once can feed back of system specialization), then before transmission, at least two among a plurality of ACK/NACK are merged, make the quantity of the ACK/NACK that obtains after the merging be not more than this setting threshold;
To in the up channel of correspondence, transmit through merging the ACK/NACK that processes.
For the ease of understanding, below provided two embodiments (wherein, a plurality of ACK/NACK surpass setting threshold from M descending sub frame and its quantity) that realize this process in the TDD system:
A plurality of ACK/NACK are merged, the merging mode can for:
With M descending sub frame respectively corresponding ACK/NACK carry out logic add based on code word; Perhaps,
ACK/NACK on a plurality of code words in each descending sub frame is carried out logic add.
To through merging the one group of compound ACK/NACK that obtains, after Base-Band Processing, use specific up channel to transmit.
Wherein, the descending control signaling resource number that is used for belonging on numbering and this M employed first subframe of subframe user reality of up channel of transferring ACK/NACK this user is bound, namely according to the descending control signaling resource number that belongs to this user on actual employed first subframe of user in M the subframe, can obtain by a predefined function numbering of a unique up channel.
The above only is the embodiment of a plurality of ACK/NACK of feedback of systemic presupposition in the embodiment of the invention, and the method for a plurality of ACK/NACK of feedback of systemic presupposition is not limited to upper type in the embodiment of the invention, to those skilled in the art, the method for a plurality of ACK/NACK of any feedback of systemic presupposition all belongs to the category of implementing the embodiment of the invention.
Behind above flow process employing independent channel transmission SR and a plurality of ACK/NACK, the processing mode that network side is taked may further comprise the steps as shown in Figure 4:
Step 401, network side judge whether the subframe of current reception is the SR subframe, if judge and to be, then execution in step 402, otherwise execution in step 404.
In this step, network side at first is defined as the cycle of the feedback SR of UE configuration, and corresponding subframe is the SR subframe when this cycle arrives.
Step 402, detect whether the signal transmission is arranged in up channel corresponding to SR, if judge and be, then execution in step 403, otherwise execution in step 404.
Step 403, determine that UE has sent SR, and the SR of response UE.
The method of step 404, use systemic presupposition detects ack/nack signal, and determines whether data retransmission.
In the step 404, according to the difference of the method for a plurality of ACK/NACK of feedback of systemic presupposition in the step 304, the processing mode that receiving terminal is taked is also different, and is specific as follows:
Receiving terminal detects the ack/nack signal that transmits in the up channel of correspondence, determine the state of the ACK/NACK that each descending sub frame is corresponding, and judge according to the state of determining whether needs retransmit for data on each descending sub frame, particularly, if reaching maximum retransmission (comprising first transmission) before, the data of transmitting on arbitrary descending sub frame decoding error or loss of data occur at receiving terminal, and then the data on this M descending sub frame all will retransmit; If the data on this M descending sub frame all correctly receive, then do not need to retransmit.Wherein, the ack/nack signal that transmits in the up channel of correspondence can be compound ack/nack signal.
Because receiving terminal only detects for the detection of SR whether the signal transmission is arranged in its corresponding up channel, so among this embodiment, the feedback signal of in up channel corresponding to SR, transmitting can for:
In a plurality of ack/nack signals any one; Or,
In the compound ack/nack signal that at least two merging in a plurality of ack/nack signals obtain any one.
Namely in above-mentioned steps 303, use system to transmit above-mentioned ack/nack signal as the up channel that SR distributes in advance.
Corresponding therewith, if the appointment feedback signal of transmitting in up channel corresponding to SR is ack/nack signal, then receiving terminal detects after the identical ack/nack signal from different channels can being merged, wherein, this different channels is respectively for the up channel of feedback SR and the up channel that is used for transferring ACK/NACK of determining according to the systemic presupposition rule.Merge the detection performance that has improved ack/nack signal by signal, also namely when above-mentioned steps 402 detection SR respective channels have signal, the signal that transmits on the up channel that this signal is corresponding with ACK/NACK merges, then execution in step 404, wherein, the ack/nack signal that detects in the step 404 is the signal after merging.
In the feedback method of the ACK/NACK that second embodiment of the invention provides, before being used for a plurality of ACK/NACK to be feedback of sub-frame of uplink transmission of feedback SR, the SR feedback requirements of UE is mapped as ACK/NACK, ACK/NACK and ACK/NACK to be feedback that mapping obtains is multiplexing, and be used for the multiplexing ack/nack signal that obtains of sub-frame of uplink transmission of feedback SR, specifically as shown in Figure 5, this process specifically comprises the steps:
Step 501, judge whether the subframe of current data to be transmitted is the SR subframe, if judge and be, then execution in step 502, otherwise execution in step 507.
The concrete execution principle of this step is consistent with above-mentioned steps 301 described principles, is not described in detail herein.
Step 502, judge that whether the number M of ack/nack signal to be feedback is more than or equal to setting threshold (in the subsequent descriptions, supposing that this threshold value is 4), if then execution in step 503; Otherwise execution in step 504.
Step 503, with at least two merging among M the ACK/NACK to be feedback, obtain the individual compound ACK/NACK of M ', wherein, 1≤M '≤3.
In this step, when at least two among M the ACK/NACK were merged, the ACK/NACK that can flexible choice merges as shown in Figure 6, if 4 ACK/NACK are arranged, then can merge the 3rd and the 4th ACK/NACK.Certainly, also the 1st and the 2nd ACK/NACK can be merged, perhaps the 2nd and the 3rd ACK/NACK be merged.
Step 504, determine whether UE has SR, will determine that according to default corresponding relation the result is mapped as ACK/NACK, and ACK/NACK and ACK/NACK to be feedback that mapping is obtained are multiplexing.
In this step, ACK/NACK to be feedback is M original ACK/NACK to be feedback, also can be to merge the individual compound ACK/NACK of M ' that obtains through step 503.
Step 505, according to number and the state of the signal of the multiplexing ACK/NACK that obtains, be identified for channel number corresponding to the up channel of signal transmission and the feedback information of setting bit.
In this step, according to number and the state of the signal of the multiplexing ACK/NACK that obtains, the feedback information that is identified for channel number corresponding to the up channel of signal transmission and sets bit is specially:
Number according to the multiplexing ACK/NACK that obtains is determined corresponding mapping relations (or mapping table), these mapping relations are corresponding with the number of ACK/NACK, and these mapping relations are the corresponding relation between state, the up channel numbering of ACK/NACK and the feedback information of setting bit, wherein, ACK/NACK can be the ACK/NACK that obtains after compound, up channel comprises corresponding with ACK/NACK respectively up channel and the up channel that is used for feedback SR, and the bit number of feedback information can be set as required;
According to the mapping relations of determining, determine the up channel numbering corresponding with the state of the multiplexing ACK/NACK that obtains and the feedback information of setting bit.
Step 506, set the feedback information of bit by up channel transmission corresponding to the up channel determined numbering.
The method of step 507, use systemic presupposition is fed back a plurality of ACK/NACK.
Principle described in the detailed process of this step 507 and the above-mentioned steps 304 is basically identical, is not described in detail herein.
In the above-mentioned steps 504, default corresponding relation can for:
Corresponding A CK when UE has SR, UE be corresponding NACK or DTX during without SR.
This corresponding relation on-fixed pattern is NACK or DTX in the time of also can SR being arranged for UE, is ACK during without SR.
Add the schematic diagram of SR on the basis of Fig. 6 as shown in Figure 7, be about to SR and feed back as M '+1 ack/nack signal.
ACK/NACK and ACK/NACK to be feedback that mapping obtains is multiplexing, be about to ACK/NACK that mapping obtains and insert among M (or individual multiplexing the obtaining of M ') ACK/NACK to be feedback.
And, after inserting the ACK/NACK that mapping obtains, the insertion position of the ACK/NACK that need to obtain according to this mapping, adjusting up channel numbering corresponding to ACK/NACK to be feedback and system is the up channel numbering that is used for feedback SR that UE distributes.For example, among Fig. 7, the ACK/NACK that mapping is obtained is inserted into the 4th position, then Adjustment System is that the up channel that is used for feedback SR that UE distributes is numbered 3, and to adjust channel number corresponding to compound ACK/NACK that former the 3rd and the 4th ACK/NACK merging obtain be 2 (channel number is since 0).
In the above-mentioned steps 505, according to the signal condition of the multiplexing ACK/NACK that obtains, determine channel number that up channel is corresponding and set the embodiment of feedback information of bit as follows:
At first, number according to the multiplexing ACK/NACK that obtains is determined corresponding mapping relations (or mapping table), then the state of the compound ACK/NACK that obtains according to merging, look into the mapping table of determining and obtain 2 bit feedback information b (0), b (1), and for channel number corresponding to up channel of transmitting this feedback information, with b (0), b (1) carries out using corresponding up channel transmission after the Base-Band Processing.
Each descending sub frame exist one with its unique corresponding up channel numbering.In this execution mode, UE need to select corresponding channel number and 2 bit feedback information b (0) according to the concrete condition of compound ACK/NACK corresponding to each descending sub frame, b (1), wherein, b (0), the concrete condition of the compound ACK/NACK that the value of b (1) and each descending sub frame are corresponding is relevant, and following table has provided mapping table corresponding when 2 descending sub frames are arranged, the method is only applicable to the situation of 1<M≤4, and wherein M is the quantity of descending sub frame.
Subframe 1, subframe 2 |
n
UL,m |
b(0),b(1) |
ACK, ACK | n | |
UL,1 |
1,1 |
ACK,NACK/DTX | n |
UL,0 |
0,1 |
NACK/DTX,ACK |
n
UL,1 |
0,0 |
NACK/DTX,NACK | n |
UL,1 |
1,0 |
NACK,DTX | n |
UL,0 |
1,0 |
DTX,DTX |
N/A (sky) |
N/A (sky) |
Above mapping table can also provide by the alternate manner that can embody above-mentioned mapping relations, particularly, mapping table described in the embodiment of the invention can be with reference to the regulation of TS36.213 standard, namely according to the different corresponding different mapping tables of the number of compound rear ACK/NACK, different from the TS36.213 standard code, the ACK/NACK in the embodiment of the invention in the mapping table can be the compound ACK/NACK that obtains after merging.
After according to above flow process the SR feedback requirements of UE being mapped as ACK/NACK and being multiplexed in the UE ack/nack signal to be feedback, the processing mode that network side is taked may further comprise the steps as shown in Figure 8:
Step 801, network side judge whether the subframe of current reception is the SR subframe, if judge and to be, then execution in step 802, otherwise execution in step 806.
Step 802, determine the employed up channel of signal transmission.
In this step, available up channel is carried out blind check, to determine the up channel of signal transmission.Wherein, available up channel comprises: a plurality of ACK/NACK respectively up channel and the system of correspondence are the up channel that UE feedback SR distributes.
Step 803, detect the signal that transmits on the up channel determine, determine the content of the feedback information that transmits on this up channel.
Up channel numbering and the feedback information content of the signal transmission that step 804, basis are determined are looked into the mapping table corresponding with the number of the ACK/NACK that feeds back, determine the state of the ack/nack signal of feedback.
In this step, the ACK/NACK of feedback is: UE is mapped as ACK/NACK to the feedback requirements of SR is multiplexed into the compound ACK/NACK that obtains in the UE ack/nack signal to be feedback.
Step 805, according to the state of ack/nack signal of feedback, determined whether SR and whether needed to carry out data re-transmission.
In this step, at first determine the state of the ACK/NACK that mapping obtains according to the state of the ack/nack signal that feeds back, particularly, the insertion position of the ACK/NACK that obtains according to user's SR Demand mapping, i.e. corresponding sequence number (in such as Fig. 7 in the ACK/NACK of feedback corresponding the 4th sequence number) in the ACK/NACK of feedback, the state of the ACK/NACK that definite mapping obtains, the state of the ACK/NACK that then obtains according to mapping and default corresponding relation determine whether this UE has SR.
The method of step 806, use systemic presupposition detects a plurality of ack/nack signals, and determines whether data retransmission.
Principle described in this step detailed process and the above-mentioned steps 404 is basically identical, is not described in detail herein.
Among this embodiment, if the predetermined method of system will be fed back a plurality of ACK/NACK groupings, can be ACK/NACK to the Demand mapping of feedback SR with UE then carries out multiplexingly with wherein one group of ACK/NACK, and the ACK/NACK of other group continues the predetermined method of use system and feeds back.
In the feedback method of the ACK/NACK that third embodiment of the invention provides, if UE has SR, then transmit a plurality of ack/nack signals to be feedback at the up channel that is used for feedback SR.
Preferably, the compound ack/nack signal of ack/nack signal to be feedback for obtaining through merging that transmits at the up channel that is used for feedback SR.
Among this embodiment, when UE has SR, transmitting a plurality of ack/nack signals to be feedback at the up channel that is used for feedback SR, and at the channel that is used for feeding back ACK/NACK of determining according to systemic presupposition method signal transmission not, thereby channel resource saved.
Corresponding therewith, receiving terminal determine that then UE has SR, and the signal that further up channel that is used for feeding back SR is transmitted detects when the system of detecting is the up channel that is used for feedback SR that UE distributes when the signal transmission is arranged, and determines the state of ACK/NACK.
In the feedback method of the ACK/NACK that fourth embodiment of the invention provides, when UE had SR, any one in being used for the up channel transmission ack/nack signal to be feedback of transmission SR or ack/nack signal to be feedback were through merging any one in the compound ack/nack signal that obtains;
To be feedback in the up channel transmission that is used for feeding back ACK/NACK of determining according to the systemic presupposition method
Other signal in the ack/nack signal, i.e. other signal beyond the ack/nack signal that the up channel that is used for transmission SR transmits.
Concrete feedback procedure is consistent with the described basic principle of step 301~step 304 among above-mentioned the first embodiment; Concrete receiving course is consistent with the described basic principle of step 401~step 404 among above-mentioned the first embodiment, and after above-mentioned signal transfers to receiving terminal, need and to merge rear the detection for the signal that transmits on the up channel that feeds back SR and the signal that is used for transmitting on the up channel of feeding back ACK/NACK of determining according to the systemic presupposition method, to strengthen network side to the detection accuracy of ack/nack signal.
Corresponding with the described feedback method of above-described embodiment, the embodiment of the invention also provides the feedback device of HARQ acknowledge message in a kind of carrier aggregation system, and as shown in Figure 9, this device comprises:
SR subframe determining unit 901 and signal transmission unit 902.Wherein:
SR subframe determining unit 901 is for the sub-frame of uplink that is identified for feedback scheduling request SR;
Signal transmission unit 902, the sub-frame of uplink for determining in SR subframe determining unit 901 transmits a plurality of HARQ acknowledge message signals to be feedback.
Among the embodiment, above-mentioned signal transmission unit also is used for: when UE has SR, specify feedback signal in the up channel transmission that is used for feedback SR.
Particularly, the appointment feedback signal of above-mentioned signal transmission unit transmission comprises:
In a plurality of HARQ acknowledge message signals to be feedback any one; Or,
A plurality of HARQ acknowledge message signals to be feedback are through merging any one in the compound HARQ acknowledge message signal that obtains.
Among the embodiment, as shown in figure 10, feedback device shown in Figure 9 also comprises:
Signal merge cells 903 is used for appointment feedback signal and the HARQ acknowledge message signal to be feedback of signal transmission unit 902 transmission are merged at receiving terminal.
Among the embodiment, above-mentioned signal transmission unit 902 also is used for:
When the number of HARQ acknowledge message signal to be feedback during greater than setting threshold, before transmission HARQ acknowledge message signal to be feedback, with at least two merging in the HARQ acknowledge message signal to be feedback, obtain being not more than a described threshold value HARQ acknowledge message signal.
Among the embodiment, above-mentioned signal transmission unit 902 specifically is used for:
On the sub-frame of uplink that SR subframe determining unit is determined, specify HARQ acknowledge message signal by the up channel transmission of determining according to the systemic presupposition rule; Wherein,
The systemic presupposition rule comprises: specify HARQ acknowledge message signal to a described up channel should be arranged for one.
Among the embodiment, as shown in figure 11, feedback device shown in Figure 9 also comprises:
Signal multiplexing unit 904 was used for before signal transmission unit 902 transmission HARQ acknowledge message signal to be feedback, and the SR feedback requirements of UE is mapped as the HARQ acknowledge message, and HARQ acknowledge message and HARQ acknowledge message to be feedback that mapping is obtained are multiplexing;
Correspondingly, signal transmission unit 902 specifically is used for: at described sub-frame of uplink, and the signal transmission Multiplexing Unit 904 multiplexing HARQ acknowledge message signals that obtain.
Among the embodiment, the signal multiplexing unit 904 that feedback device shown in Figure 11 comprises specifically is used for:
Determine whether UE has SR, and will determine that according to default corresponding relation the result is mapped as the HARQ acknowledge message.
Among the embodiment, the signal multiplexing unit 904 that feedback device shown in Figure 11 comprises specifically is used for:
If the HARQ acknowledge message that the number M of HARQ acknowledge message to be feedback less than setting threshold, then obtains mapping is inserted M HARQ acknowledge message;
If the number M of HARQ acknowledge message to be feedback more than or equal to setting threshold, then with at least two merging in the HARQ acknowledge message to be feedback, obtains N HARQ acknowledge message, and the HARQ acknowledge message that mapping obtains is inserted described N HARQ acknowledge message; Wherein, N is less than described threshold value.
Among the embodiment, the signal transmission unit 902 that feedback device shown in Figure 11 comprises can also specifically comprise: channel and information determination module and transport module (not marking in the drawings).Wherein,
Channel and information determination module are used for number and state according to the signal multiplexing unit 904 multiplexing HARQ acknowledge messages that obtain, are identified for up channel numbering and the corresponding feedback information of signal transmission;
Transport module is used at channel and the definite described feedback information of up channel transmission corresponding to described up channel numbering of information determination module.
One more specifically among the embodiment, above-mentioned channel and information determination module specifically are used for:
Number according to the signal multiplexing unit 904 multiplexing HARQ acknowledge messages that obtain is determined default mapping relations; These mapping relations are corresponding with the number of HARQ acknowledge message, and these mapping relations are state, the up channel numbering of HARQ acknowledge message and the corresponding relation between the feedback information; Wherein, up channel comprises corresponding with HARQ acknowledge message to be feedback respectively up channel and the up channel that is used for feedback SR;
According to the mapping relations of determining, determine up channel numbering and the feedback information corresponding with the state of the multiplexing HARQ acknowledge message that obtains.
Among the embodiment, as shown in figure 12, feedback device shown in Figure 11 also comprises:
Signal resolution unit 905, be used for according to default mapping relations, determine the state of HARQ acknowledge message according to the feedback information of channel number corresponding to the up channel of transmitting feedback information and signal transmission unit 902 transmission at receiving terminal, determine the state of the HARQ acknowledge message that mapping obtains according to the state of HARQ acknowledge message, and the state of the HARQ acknowledge message that obtains according to mapping determines whether described UE feeds back SR.
In further embodiment of this invention, signal transmission unit 902 shown in Figure 9 also is used for:
When UE has SR, transmit a plurality of HARQ acknowledge message signals to be feedback at the up channel that is used for feedback SR.
Preferably, the HARQ acknowledge message signal a plurality of to be feedback in the up channel transmission that is used for feedback SR merges the compound HARQ acknowledge message signal that obtains for process.
The technique scheme that provides by the embodiment of the invention, in the carrier aggregation system of LTE, at first be identified for feeding back the sub-frame of uplink of SR, on this sub-frame of uplink, transmit a plurality of HARQ acknowledge message signals to be feedback, thereby realized in the carrier aggregation system of LTE on a sub-frame of uplink in particular for a plurality of HARQ acknowledge message signals of sub-frame of uplink transmission of feedback SR the performance of the carrier aggregation system of perfect LTE.
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.