CN101777972B - Method, device and system for receiving data under ACK (Acknowledgement Character)/NACK(Negative Acknowledgement) repeating mechanism - Google Patents
Method, device and system for receiving data under ACK (Acknowledgement Character)/NACK(Negative Acknowledgement) repeating mechanism Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for receiving data under a ACK (Acknowledgement Character)/NACK(Negative Acknowledgement) repeating mechanism. The method comprises the following steps: receiving downlink data and timing; monitoring a downlink physical control channel when the timing reaches the preconfigured round-trip time of a repeating feedback mechanism; receiving subsequent downlink data according to a control signaling loaded by the downlink physical control channel; and ensuring that the round-trip time of the repeating feedback mechanism is equal to the summation of the conventional round-trip time and the difference value of the time for feeding back the ACK/NACK for the last time and the time for feeding back the ACK/NACK for the first time. The embodiment of the invention also discloses a method and a device for configuring the round-trip time under the repeating mechanism as well as a communication system. The embodiment of the invention considers the time delay caused by the feedback of the repeated ACK/NACK and thereby reconfigures a RTT(Round-trip time) timer, so that UE(User Equipment) can determine the time for monitoring PDCCH(Physical Downlink Control Channel) and avoid the waste of electricity energy resources caused by prematurely monitoring the PDCCH.
Description
Technical field
The present invention relates to the mobile communication technology field, more particularly, relate to data receive method and device under a kind of repeat ACK (Acknowledgement confirms notice)/NACK (Negative Acknowledgment, the notice of makeing mistakes) mechanism.
Background technology
In communication system, control command downlink data receiving or transmission upstream data that UE (User Equipment, subscriber equipment) issues according to network side.When carrying out transfer of data, UE monitoring control channel PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel), if descending control command for this terminal is arranged, then according to downlink data that should descending control command demodulation network side transmission.
In order to guarantee the reliability of transfer of data, HARQ (Hybrid Automatic Repeat Request, mixed automatic retransfer) technology is introduced into and develops, in the communication system, receiving terminal is after the data that receive the opposite end transmission, send the ACK/NACK feedback according to demodulation result to transmitting terminal, transmitting terminal can determine whether to carry out data re-transmission according to feedback result.In addition, in some communication system, in order to guarantee the reliability of HARQ feedback, introduced repeat ACK/NACK (ACK/NACK repetition) mechanism, be after UE sends conventional ACK/NACK feedback, to send same ACK/NACK feedback at ensuing continuous several sub-frame of uplink.
The inventor finds, under repeat ACK/NACK mechanism, the feedback of UE need to take several sub-frame of uplink continuously, therefore can exert an influence to existing minimum RRT (Round-Trip Time, two-way time), and prior art is not by considering this impact, the configuration of its RRT timer (RRT timer) is still carried out according to existing mode, cause UE can not grasp the correct opportunity of monitoring PDCCH, for example: monitor too early, cause the problem of power resource waste.In addition, in UE configuration DRX situation, when the DRX unreasonable allocation, during network side scheduling UE, UE may enter resting state, causes traffic control normally to carry out.
Summary of the invention
In view of this, the invention provides data receive method, device and communication system under a kind of repeat ACK/NACK mechanism, consider the impact that repeat ACK/the NACK mode is brought, to being configured two-way time, so that UE can grasp the correct opportunity of monitoring PDCCH.
Data receive method under a kind of repeat ACK/NACK mechanism comprises:
Downlink data receiving, and carry out timing;
Reach default repeating feedback mechanism during two-way time in timing, monitor downlink physical control channel; Described repeating feedback mechanism equals to add the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first two-way time conventional two-way time;
Control signal according to described downlink physical control channel carrying receives follow-up downlink data.
Preferably, in the said method, described repeat ACK/NACK comprises the ACK/NACK that cancels because of conflict.
Preferably, in the said method, dispose described repeating feedback mechanism two-way time according to following steps:
Determine to need to send the number of repetition of ACK/NACK;
Calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
With described difference and conventional two-way time and be defined as described repeating feedback mechanism two-way time.
The embodiment of the invention also discloses a kind of configuration repeat ACK/NACK method of machine-processed lower two-way time, comprising:
Determine to need to send the number of repetition of ACK/NACK;
Calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
With described difference and conventional two-way time and be defined as described repeating feedback mechanism two-way time.
The embodiment of the invention also discloses the data receive method under a kind of repeat ACK/NACK mechanism, comprising:
The data receiver unit is used for downlink data receiving;
Timer is used for carrying out timing when described data receiver unit downlink data receiving;
Monitoring unit is used for reaching default repeating feedback mechanism during two-way time in described timer timing, monitors downlink physical control channel; Described repeating feedback mechanism equals to add the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first two-way time conventional two-way time;
Control unit is used for indicating described data receiver unit to receive follow-up downlink data according to the control signal of described downlink physical control channel carrying.
Preferably, said apparatus also comprises:
The timer dispensing unit, be used for: determine that needs send the number of repetition of ACK/NACK, calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first, with this difference and maximum clocking value conventional two-way time and that be configured to timer.
Preferably, described repeat ACK/NACK comprises the ACK/NACK that cancels because of conflict.
The embodiment of the invention also provides the device of the two-way time under a kind of configuration repeat ACK/NACK mechanism simultaneously, comprising:
Determining unit is used for definite number of repetition that needs to send ACK/NACK;
The first computing unit is used for calculating the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
The second computing unit, be used for to calculate this difference and conventional two-way time and;
Dispensing unit is used for result of calculation with described the second computing unit and is defined as repeating feedback mechanism two-way time.
The embodiment of the invention also discloses a kind of communication system, comprises base station and subscriber equipment;
Described subscriber equipment is used for: downlink data receiving, and carry out timing; Reach default repeating feedback mechanism during two-way time in timing, monitor downlink physical control channel; And the control signal that carries according to described downlink physical control channel receives follow-up downlink data; Equal to add conventional two-way time the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first described two-way time.
Preferably, in the said system, described communication system is long-term advancing time division duplex LTE TDD system or Long Term Evolution Frequency Division Duplexing (FDD) LTE FDD system.
Can find out from above-mentioned technical scheme, compared with prior art, the embodiment of the invention has been considered the time delay that repeat ACK/the NACK feedback causes, to reconfiguring two-way time, thereby so that UE can determine to monitor the opportunity of PDCCH, avoid too early monitoring PDCCH and caused the power resource waste, reached the effect of power saving.In addition, in UE configuration DRX situation, can guarantee that UE can in time monitor PDCCH when network side is dispatched, and then guarantee normally carrying out of network side traffic control.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the minimum RRT schematic diagram of LTE FDD system;
Fig. 2 is the frame structure schematic diagram of LTE TDD system;
Data receive method flow chart under a kind of repeat ACK that Fig. 3 provides for the embodiment of the invention/NACK mechanism;
The structural representation of the data sink under a kind of repeat ACK that Fig. 4 provides for the embodiment of the invention/NACK mechanism;
The structural representation of the data sink under the another kind of repeat ACK that Fig. 5 provides for the embodiment of the invention/NACK mechanism;
A kind of structural representation that disposes the device of two-way time that Fig. 6 provides for the embodiment of the invention;
The structural representation of a kind of communication system that Fig. 7 provides for the embodiment of the invention.
Embodiment
Problem based on prior art exists the invention provides the data receiver scheme under a kind of repeat ACK/NACK mechanism, and the time-delay for repeat ACK/NACK produces reconfigures RRT timer, thereby so that UE can rationally monitor PDCCH.
For the purpose of clear, the below at first does simple introduction to the technical term or the noun that hereinafter occur:
LTE, Long Term Evolution, i.e. Long Term Evolution;
TDD, Time Division Duplexing, i.e. time-division duplex;
FDD, Frequency Division Duplexing, i.e. Frequency Division Duplexing (FDD);
Conventional RRT, Round-Trip Time i.e. conventional two-way time, refers under conventional ACK/NACK feedback mechanism, sends certain data from network side and feeds back the time that also can again carry out transfer of data to receiving ACK/NACK.For example, in LTE FDD system, this, minimum value can equal the time T 4 that time T 3+eNB that time T 2+UE that downlink data transmission time T 1+UE processes downlink data sends feedback processes feedback and organizes data retransmission two-way time, as shown in Figure 1;
Repeating feedback mechanism RRT i.e. repeating feedback mechanism two-way time, refers under repeat ACK/NACK feedback mechanism, sends certain data to receiving the ACK/NACK feedback and can again carrying out time of transfer of data from network side.
DwPTS, Downlink Pilot Time Slot, descending pilot frequency time slot;
GP, Guard Period, protection time slot;
UpPTS, Uplink Pilot Time Slot, uplink pilot time slot;
MCS, Modulation and Coding Scheme, the set of coded modulation form;
DRX, Discontinuous Reception, i.e. discontinuous reception.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention discloses the data receive method under a kind of repeat ACK/NACK mechanism, the method utilizes pre-configured repeating feedback mechanism RRT Timer to carry out data receiver.
Described repeating feedback mechanism RRT Timer is configured to: the time of the last feeding back ACK/NACK of conventional RRT+ and the difference of the time of feeding back ACK/NACK first.
Corresponding different system, the concrete configuration of above-mentioned RRT Timer are also different, and the below describes as an example of LTE TDD system and LTE FDD system example:
1, for LTE TDD system
The frame structure of LTE TDD system as shown in Figure 2, each radio frames is made of two fields (Half-frame), each half frame length is 5ms, formed by 5 subframes (Subframe), each subframe lengths is 1ms, subframe 1 and subframe 6 comprise three special time slots (DwPTS, GP and UpPTS) in a radio frames, and other subframes all have two normal time slots to consist of, and each normal time slot is 0.5ms.
LTE TDD system definition 7 kinds of uplink-downlink configuration modes (label is respectively 0-6) as shown in table 1:
Table 1
Wherein: D represents descending, and U represents up, and S represents to comprise the subframe of special time slot.
And which sub-frame of uplink feedback is LTE TDD system also stipulated the data of which descending sub frame transmission in, and the corresponding relation of regulation sub-frame of uplink and descending sub frame is as shown in table 2:
Table 2
Wherein: TBD is To Be Decide, namely represents character to be determined.
As shown in table 2, subframe 2 is sub-frame of uplink, its corresponding descending sub frame is the 8th, 7,6,4 subframe before this subframe 2, means that the downlink transfer of the 8th, 7,6,4 subframe before this subframe 2 (also i.e. subframe 4,5,6,8 in the previous radio frames of this subframe place radio frames) is all fed back in this subframe 2.
When the conventional RRT Timer of configuration, the interval between the ascending time slot that needs to consider the downlink data sending time slots and send feedback, that is: the interval of the descending sub frame of the transmission of data and current sub-frame of uplink for these data being carried out the ACK/NACK feedback.
Suppose: the downlink data transmission time is t1 (generally being fixed as 1ms), the descending sub frame of the transmission of data and current sub-frame of uplink for these data being carried out ACK/NACK feedback be spaced apart t2, it is t3 that network side carries out the time delay that data process, then:
Conventional RRT Timer=t1+t2+t3.
The embodiment of the invention determines to send the number of repetition of ACK/NACK feedback under repeat ACK/NACK feedback mechanism, and then determines to repeat to send the time of ACK/NACK feedback cost.And represent to repeat to send time of ACK/NACK feedback cost with moment of last transmission ACK/NACK feedback and the difference that sends first the moment of ACK/NACK feedback.
The difference of supposing this last ACK/NACK of the transmission moment of feeding back and moment that sends first the ACK/NACK feedback is t4, then repeating feedback mechanism RRT Timer=RRT Timer+t4, that is: repeating feedback mechanism RRT Timer=t1+t2+t3+t4.
Send the number of repetition of ACK/NACK feedback by the high level configuration, its numerical value can be 2,4,6 or reserved (retention).
For example: when number of repetition is 4, and feedback is in the 3rd subframe for the first time, and feedback is in the 4th subframe for the second time, and the 3rd feedback is in the 5th subframe, the 4th feedback when the 6th subframe, the conventional RRT+3 of the conventional RRT+6-3=of repeating feedback mechanism RRTTimer=.
2, for LTE FDD system
In the LTE FDD system, the downlink data transmission time generally is fixed as 1ms, and UE processes time of downlink data and eNB and processes feedback and also organize the time of data retransmission to be 3ms, and UE sends the time of conventional ACK/NACK feedback and is fixed as 1ms.Therefore, conventional RRT Timer is configured to 8m.
Consider the impact of repeat ACK/NACK feedback, repeating feedback mechanism RRT Timer is configured to: the time of the last feeding back ACK/NACK of 8ms+ and the difference of the time of feeding back ACK/NACK first.
Need to prove, no matter for LTE FDD system or LTE TDD system, comprise the feedback of cancelling because of conflict in repeat ACK/NACK feedback.
The specific implementation process of present embodiment may further comprise the steps as shown in Figure 3:
Step S31, UE receive the downlink data from network side, and carry out timing.
Step S32, judge whether timing arrives repeating feedback mechanism RRT Timer, if enter step S33; Otherwise, return step S32;
Step S33-step S34, monitor PDCCH, and judge whether to have the descending control command for this UE, if, then enter step S35, otherwise, step S333 returned;
Step S35, obtain this descending control command, and according to this descending control command downlink data receiving.
After obtaining descending control command, according to the downlink data of the demodulates information eNB such as the frequency resource position in this descending control command and MCS transmission.
The embodiment of the invention has taken into full account the time delay that repeat ACK/the NACK feedback causes, RTT timer is reconfigured, thereby so that UE can determine to monitor the opportunity of PDCCH, avoided too early monitoring PDCCH and caused power resource waste, reached the purpose of power saving.
In addition, in UE configuration DRX situation, can so that UE can in time monitor PDCCH when network side is dispatched, guarantee normally carrying out of network side traffic control.
Need to prove that the mode that disposes described RTT timer also belongs to protection category of the present invention.
For the data receive method under above-mentioned repeat ACK/NACK mechanism, the embodiment of the invention also provides a kind of device for realizing the method simultaneously, the structure of this device comprises as shown in Figure 4: data receiver unit 41, timer 42 (being RTT timer), monitoring unit 43 and control unit 44; Wherein:
Monitoring unit 43 is used for reaching pre-configured repeating feedback mechanism during two-way time in described timer timing, monitors downlink physical amount control channel.
Described repeating feedback mechanism equals to add the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first two-way time conventional two-way time.
Can find out, consider the time delay of repeat ACK/NACK feedback described two-way time, so that UE can rationally monitor PDCCH.
The another kind that Fig. 5 shows the embodiment of the invention to be provided is realized the structure of the device of said method, and this device comprises: data receiver unit 51, timer 52, monitoring unit 53, control unit 54 and timer dispensing unit 55; Wherein:
The function of data receiver unit 51, timer 52, monitoring unit 53 and control unit 54, basic identical with the function of data receiver unit 41, timer 42 (being RTT timer), monitoring unit 43 and control unit 44;
Timer dispensing unit 55 is used for timer 52 is configured, and concrete mode is as follows:
Determine to need send the number of repetition of ACK/NACK, calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first, with this difference and maximum clocking value conventional two-way time and that be configured to timer 52.
This maximum clocking value namely equals two-way time, so when timer 52 timing arrived maximum clocking value, monitoring unit 53 began to monitor PDCCH.
Need to prove that the subscriber equipment that comprises said apparatus belongs to protection category of the present invention too.
Above-described embodiment disclosed device goes for LTE TDD system and LTE FDD system, in the LTEFDD system, conventional two-way time=downlink data transmission time+UE process downlink data time+eNB processes feedback and organizes the time+UE of data retransmission to send the time=8ms of conventional ACK/NACK feedback, so repeating feedback mechanism equals two-way time: the time of the last feeding back ACK/NACK of 8ms+ and the difference of the time of feeding back ACK/NACK first.And in LTE TDD system, UE processes time of downlink data can be by the descending sub frame of the transmission of data and current time interval for these data being carried out the sub-frame of uplink that ACK/NACK feeds back, therefore, equal to conventional two-way time: the descending sub frame of downlink data transmission time+the transmission of data carries out the time delay that data are processed with the interval+network side of current sub-frame of uplink for these data being carried out the ACK/NACK feedback, the time of conventional two-way time repeating feedback mechanism two-way time=described+last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first.
The embodiment of the invention also discloses a kind of device that disposes two-way time, and its structure comprises as shown in Figure 6: determining unit 61, the first computing unit 62, the second computing unit 63 and dispensing unit 64; Wherein:
Determining unit 61 is used for definite number of repetition that needs to send ACK/NACK, can determine according to the configuration messages of high level;
The first computing unit 62 is used for calculating the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
The second computing unit 63, be used for to calculate this difference and conventional two-way time and;
Dispensing unit 64 is used for result of calculation with the second computing unit 63 as two-way time.
In addition, the embodiment of the invention also provides a kind of communication system, and the structure of this communication system comprises eNB71 and UE72 as shown in Figure 7, wherein:
UE comprises the data sink 721 under repeat ACK/NACK mechanism, and data sink 721 is used for: downlink data receiving, and carry out timing, reaching pre-configured repeating feedback mechanism during two-way time, monitor downlink physical amount control channel; Described repeating feedback mechanism equals to add the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first two-way time conventional two-way time; Then, the control signal according to described downlink physical control channel carrying receives follow-up downlink data.
The structure of data sink 721 can be identical with the structure of Fig. 4, device shown in Figure 5.
In the present embodiment, UE monitors PDCCH according to determining when predetermined two-way time, and described two-way time determine to have taken into full account the impact that repeat ACK/NACK feedback is brought, thereby so that be rationally the opportunity of UE monitoring PDCCH compared with prior art, avoid monitoring too early the waste that PDCCH causes power resource.In addition, when UE disposes DRX, can also make UE when network side is dispatched, in time monitor PDCCH, guarantee normally carrying out of network side traffic control.
It will be understood by those skilled in the art that and to represent information, message and signal with many different techniques and in the technology any one.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.
The professional can also further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the data receive method under repeat ACK/NACK mechanism is characterized in that, comprising:
Downlink data receiving, and carry out timing;
Reach default repeating feedback mechanism during two-way time in timing, monitor downlink physical control channel; Described repeating feedback mechanism equals to add the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first two-way time conventional two-way time, described conventional two-way time, refer under conventional ACK/NACK feedback mechanism, send data to the time that receives the ACK/NACK feedback and can again carry out transfer of data from network side;
Control signal according to described downlink physical control channel carrying receives follow-up downlink data.
2. the method for claim 1 is characterized in that, described repeat ACK/NACK comprises the ACK/NACK that cancels because of conflict.
3. the method for claim 1 is characterized in that, disposes described repeating feedback mechanism two-way time according to following steps:
Determine to need to send the number of repetition of ACK/NACK;
Calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
With described difference and conventional two-way time and be defined as described repeating feedback mechanism two-way time.
4. a method that disposes the two-way time under repeat ACK/NACK mechanism is characterized in that, comprising:
Determine to need to send the number of repetition of ACK/NACK;
Calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
With described difference and conventional two-way time and be defined as repeating feedback mechanism two-way time, described conventional two-way time, refer under conventional ACK/NACK feedback mechanism, send data to the time that receives the ACK/NACK feedback and can again carry out transfer of data from network side.
5. the data sink under repeat ACK/NACK mechanism is characterized in that, comprising:
The data receiver unit is used for downlink data receiving;
Timer is used for carrying out timing when described data receiver unit downlink data receiving;
Monitoring unit is used for reaching default repeating feedback mechanism during two-way time in described timer timing, monitors downlink physical control channel; Described repeating feedback mechanism equals to add the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first two-way time conventional two-way time, described conventional two-way time, refer under conventional ACK/NACK feedback mechanism, send data to the time that receives the ACK/NACK feedback and can again carry out transfer of data from network side;
Control unit is used for indicating described data receiver unit to receive follow-up downlink data according to the control signal of described downlink physical control channel carrying.
6. device as claimed in claim 5 is characterized in that, also comprises:
The timer dispensing unit, be used for: determine that needs send the number of repetition of ACK/NACK, calculate the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first, with this difference and maximum clocking value conventional two-way time and that be configured to timer.
7. device as claimed in claim 5 is characterized in that, described repeat ACK/NACK comprises the ACK/NACK that cancels because of conflict.
8. a device that disposes the two-way time under repeat ACK/NACK mechanism is characterized in that, comprising:
Determining unit is used for definite number of repetition that needs to send ACK/NACK;
The first computing unit is used for calculating the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first;
The second computing unit, be used for to calculate this difference and conventional two-way time and, refer to described conventional two-way time under conventional ACK/NACK feedback mechanism, sends data to the time that receives the ACK/NACK feedback and can again carry out transfer of data from network side;
Dispensing unit is used for result of calculation with described the second computing unit and is defined as repeating feedback mechanism two-way time.
9. a communication system comprises base station and subscriber equipment, it is characterized in that:
Described subscriber equipment is used for: downlink data receiving, and carry out timing; Reach default repeating feedback mechanism during two-way time in timing, monitor downlink physical control channel; And the control signal that carries according to described downlink physical control channel receives follow-up downlink data; Equal to add conventional two-way time the time of last feeding back ACK/NACK and the difference of the time of feeding back ACK/NACK first described two-way time, described conventional two-way time, refer under conventional ACK/NACK feedback mechanism, send data to the time that receives the ACK/NACK feedback and can again carry out transfer of data from network side.
10. communication system as claimed in claim 9 is characterized in that, described communication system is long-term advancing time division duplex LTE TDD system or Long Term Evolution Frequency Division Duplexing (FDD) LTE FDD system.
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| CN103368706A (en) * | 2012-03-26 | 2013-10-23 | 中兴通讯股份有限公司 | Transmission method, device and system for hybrid automatic repeat request |
| CN107113118B (en) * | 2015-04-27 | 2020-01-31 | 华为技术有限公司 | Reply message transmission method and network device |
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