CN101399646B - Method and apparatus for indicating ACK/NACK transmission by LTE-TDD system - Google Patents
Method and apparatus for indicating ACK/NACK transmission by LTE-TDD system Download PDFInfo
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Abstract
The invention discloses a method for indicating ACK/NACK transmission for an LTE-TDD system. The method comprises the following steps: a network side makes statistics on distributing condition of downlink service data of each user equipment; physical resource for loading ACK/NACK is determined, after determining that downlink service data of certain user equipment is scheduled by a plurality of times in a preset related period; indication information is transmitted to indicate the user equipment to transmit ACK/NACK of the downlink data on physical resource. The invention simultaneously discloses a device for indicating ACK/NACK transmission for the LTE-TDD system. The invention can uniformly arrange the physical resource in advance under the circumstance that the user equipment needs to simultaneously feed back a plurality of ACK/NACKs so as to ensure that a plurality of ACK/NACKs of the user equipment can be transmitted on the same physical resource, thereby ensuring the characteristic of single carrier.
Description
The application require on September 30th, 2007 submit that Patent Office of the People's Republic of China, application number are 200710164204.9 to, denomination of invention is the priority of the one Chinese patent application of " method and apparatus of the indication ACK/NACK of LTE-TDD system transmission ", its full content combines in this application by reference.
Technical field
The present invention relates to LTE (the Long Time Evolution of mobile communication; Long Term Evolution) technical field; More particularly, relate to the indication ACK (Acknowledgement of a kind of LTE-TDD (Time Division Duplex, time division duplex) system; True team's information)/method and apparatus of NACK (Non-Acknowledgement, nonacknowledgement information) transmission.
Background technology
Third generation communication system 3G has adopted CDMA (Code Division Multiple Access; Code division multiple access inserts) mode; To support multimedia service; Thereby make in several years of future, can have higher competitiveness, but keep this competitiveness, 3GPP (3rd Generation Partnership Project in longer time in order to ensure the pool; Third generation partner program) started LTE (Long Term Evolution, the Long Term Evolution) research project of 3G wireless interface technology.The pith of LTE comprises: shorten time delay, improve user data rate, improve power system capacity and covering, and reduce the cost of operator.
For FDD (Frequency Division Duplex; FDD) system because its up-downgoing separates on frequency, concerns so ascending-descending subframes can be set up one to one at an easy rate; That is to say the control signaling of a sub-frame of uplink; Ack signal for example, only corresponding descending sub frame, corresponding relation is simple relatively, fixing.Therefore, professional for non-continuous dispatching in the meeting of LTE system standard, confirm that its ACK feedback adopts the method for setting up mapping relations with the needs of the control channel that carries its dispatch.
Yet for the TDD system, its up-downgoing adopts unsymmetric structure to support non-symmetrical service, and the resource quantity of up-downgoing is different, and ratio is variable, and this asymmetry structure causes up-downgoing can't set up simple one-to-one relationship.In addition, the DFT-S-OFDMA technology is adopted in the uplink of LTE system, and the single-carrier property of uplink (signaling bearer is on a physical resource) has guaranteed that upward signal has lower peak-to-average power ratio PAPR, to reduce the hardware requirement to subscriber equipment.Existing LTE-TDD system does not provide under the concrete situation of technical scheme with the bonding carrier characteristics, carries out the uplink ACK transmission.
Summary of the invention
In view of this, the present invention provides a kind of LTE-TDD indication ACK/NACK of system the method and apparatus of transmission, can't under the situation of bonding carrier characteristics, carry out the problem of uplink ACK transmission to solve prior art.
The present invention is achieved in that
The method of a kind of LTE-TDD indication ACK/NACK of system transmission comprises:
Each user's equipment downward business datum distribution situation of network side statistics;
Confirmed to be used for the physical resource of loading ACK/NACK by after the scheduling repeatedly judging certain subscriber equipment downlink service data in preset associated period;
Sending indication information transmits on said physical resource to the ACK/NACK of said downlink service data to indicate this subscriber equipment.
Concrete, confirm to be used for the physical resource of loading ACK/NACK according to following steps:
Set up the corresponding relation of physical resource and ack channel in advance, the corresponding physical resource of the ack channel of predetermined number;
Confirm the number of times that is scheduled of subscriber equipment downlink service data in preset associated period, select to have physical resource, it is confirmed as the physical resource that is used for loading ACK/NACK more than perhaps equaling the free ACK channels of said scheduling times.
Preferably, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
Preferably, in the said method, network side is through extra additional Indication message in descending control signaling, the physical resource of informing subscriber equipment feeding back ACK/NACK; Perhaps, network side sends indication information, the physical resource of informing subscriber equipment feeding back ACK/NACK through broadcast channel.
Preferably, in the said method, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
Preferably, in the said method, when descending sub-frame number is less than sub-frame of uplink quantity:
Network side is provided with the mapping relations of the shared physical resource of descending control signaling and feeding back ACK/NACK channel in advance;
Said mapping relations are sent through descending control signaling, and the indication subscriber equipment is according to said mapping relations feeding back ACK/NACK on corresponding physical resource.
The present invention also discloses the device of a kind of LTE-TDD indication ACK/NACK of system transmission simultaneously, comprising:
First processing unit is used to add up each user's equipment downward business datum distribution situation, and calculates in preset associated period the number of times that the user's equipment downward data are scheduled;
Second processing unit is used for when the user's equipment downward data are repeatedly dispatched, confirming to be used for the physical resource of loading ACK/NACK in said preset associated period;
The 3rd processing unit is used to send indication information, on said physical resource, transmits to the ACK/NACK of said downlink service data to indicate this subscriber equipment.
Concrete, said second processing unit comprises:
The information reference unit is used to preserve the physical resource of foundation in advance and the corresponding relation of ack channel, the corresponding physical resource of the ack channel of predetermined number;
Physical resource is confirmed the unit; Be used for the number of times that is scheduled according to subscriber equipment downlink service data in preset associated period; Select to have physical resource, it is confirmed as the physical resource that is used for loading ACK/NACK more than perhaps equaling the free ACK channels of said scheduling times.
Preferably, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
Preferably, in the said apparatus, said indication information is an extra additional indication information in the descending control signaling, or is carried on the indication information on the broadcast channel.
Preferably, in the said apparatus, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
Preferably, said apparatus also comprises:
Manages the unit everywhere; Be used for when descending sub-frame number is less than sub-frame of uplink quantity; The indication information that will comprise the mapping relations of shared physical resource of the descending control signaling that presets and ACK/NACK sends to subscriber equipment through descending control signaling, indicates this subscriber equipment according to said mapping relations feeding back ACK/NACK on corresponding physical resource.
Can find out that from above-mentioned technical scheme compared with prior art, the present invention is through judging that whether subscriber equipment is by repeatedly scheduling in the preset associated period; If; Confirm physical resource according to scheduling times, and when said associated period finishes, send indication information and give subscriber equipment.Can guarantee up single-carrier property according to the unified ack channel of arranging of the scheduling situation of the subscriber equipment in the associated period thus.Solve prior art and can't under the situation of bonding carrier characteristics, carry out the problem of uplink ACK transmission.
Description of drawings
Fig. 1 is a prior art first kind frame structure sketch map;
Fig. 2 is second type of frame structure sketch map of prior art;
Fig. 3 is a prior art LTE-FDD system feedback ACK scheme sketch map;
Fig. 4 is one of ACK/NACK and service subframe mapping sketch map;
Fig. 5 is two of ACK/NACK and a service subframe mapping sketch map;
Fig. 6 is three of ACK/NACK and a service subframe mapping sketch map;
Fig. 7 is the flow chart of the embodiment one of the method for the indication ACK/NACK of a kind of LTE-TDD of the present invention system transmission;
Fig. 8 is 1: 6 sketch map at the uplink and downlink timeslot ratio of second type of frame for the present invention;
Fig. 9 is set the goal the really flow chart of physical resource of the embodiment of the invention one;
Figure 10 is the structural representation of the embodiment one of the device of the indication ACK/NACK of a kind of LTE-TDD of the present invention system transmission;
Figure 11 is the structural representation of the embodiment two of the device of the indication ACK/NACK of a kind of LTE-TDD of the present invention system transmission;
Figure 12 is the structural representation of second processing unit of the embodiment three of the device of the indication ACK/NACK of a kind of LTE-TDD of the present invention system transmission.
Embodiment
The LTE system confirms to support following two types of frame structures:
First kind frame structure is applicable to FDD and TDD system, and its structure is as shown in Figure 1.
The frame length 10ms of said first kind frame is made up of 20 time slots, and each slot length is 0.5ms, and from 0 to 19, two continuous time slot of mark is defined as a sub-frame, and subframe i is made up of time slot 2i and time slot 2i+1, wherein, i=0,1 ..., 9.
Concerning the FDD system, every 10ms is in the time, because up-downgoing separates on frequency domain, the provisional capital has 10 sub-frame to use up and down.
And for the TDD system, every 10ms is in the time, and up-downgoing also all has 10 sub-frame to use, and wherein subframe 0 always is assigned as downlink transfer with subframe 5.
Fig. 2 shows the sketch map of second type of frame structure.
The frame length of second type of frame also is 10ms, and every frame at first is split into the field of 2 5ms, and each field is made up of 7 business time-slots (being labeled as 0～6) and 3 special time slots (descending pilot frequency time slot, protection interval and uplink pilot time slot).Every subframe definition is a business time-slot, and wherein subframe 0 always is used for downlink transfer with descending pilot frequency time slot, and uplink pilot time slot and subframe 1 always are used for uplink.
For the data block to error of transmission is fed back re-transmission fast, and through the data block merging, make full use of the information that misdata is carried, the LTE system has adopted HARQ (Hybrid Automatic Repeat Request mixes automatic repeat requests) technology.
Accurately and efficiently feed back designation data piece how in time, whether wrong information (being ACK or NACK signal) is the important step of setting up the HARQ process.
Uplink ACK/NACK signaling is as a uplink control signaling part, and transmission means has two kinds, a kind ofly be, when UE (User Equipment, subscriber equipment) has the uplink business data transmission, ACK/NACK signaling and business datum multiplexing transmission; Another kind is that when UE did not have uplink business data, the ACK/NACK signaling was transmitted in the frequency band that the frequency band both sides of bandwidth of operation are reserved, and adopted the frequency hopping mode to improve transmission performance.
This paper discusses to second kind of situation.
For second kind of ACK/NACK transmission means; The scheme that the LTE system confirms is: the ACK/NACK of 1 bit (corresponding to the single codeword feelings) is mapped as BPSK (Binary Phase Shift Keying; Biphase phase shift keying) symbol, the ACK/NACK of 2 bits (corresponding 2 code words) is mapped as QPSK (Quadrature Phase Shift Keying, QPSK) symbol; Each modulation symbol spreads to CAZAC (permanent envelope zero autocorrelation sequence), adopts the method transmission of relevant modulation.
For first kind frame structure shown in Figure 1, each PRB (Physical Resources Blocks, Physical Resource Block) can support that at most 18U E is multiplexing; For second type of frame structure shown in Figure 2, also adopt the every PRB of hopping structure to support that at most 12UE is multiplexing.
Because the ACK/NACK signaling generally is merely 1 bit or 2 bits; If extra increase UE identifying information can increase information redundance greatly, reduce efficiency of transmission, therefore; In the LTE-FDD system; Confirm to adopt the mode of implicit indication, set up the mapping relations of the control channel sequence number that ACK/NACK signaling and corresponding scheduling control signaling of downlink take, made eNB (evolved base station) can judge the UE and the data block of ACK correspondence.Referring to Fig. 3; Indicate the method sketch map of ack channel based on implicit mode for existing LTE-FDD system; Wherein, through setting up the mapping relations of ACK/NACK signaling channel and corresponding scheduling control signaling of downlink channel in advance, make eNB can judge ACK signaling corresponding UE and data block.
In the FDD system, because the up-downgoing of FDD system is symmetrical, so ascending-descending subframes can be set up relation one to one at an easy rate.But for the TDD system, because the unsymmetric structure of its up-downgoing can't be set up the one-to-one relationship of up-downgoing as the FDD system.Referring to Fig. 4, when descending sub frame is less than or equal sub-frame of uplink, can confirm transferring ACK/NACK and service subframe mapping relations through stipulated form.Referring to Fig. 5, when descending subframe is less than sub-frame of uplink, mean that an ascending time slot need send the ack/nack signal of a plurality of descending time slot data blocks.For example, the up-downgoing ratio of first kind frame structure is that 1/9, the second type of frame structure up-downgoing ratio is 1/6, and then each sub-frame of uplink need transmit 9 or 6 ack/nack signals that the descending sub frame data block is corresponding.And, for a subscriber equipment, once transmit 9 or 6 ack/nack signals at most possibly, in order to ensure the single-carrier property of uplink, a plurality of ACK/NACK signalings must be unified to arrange.
Prior art does not provide concrete technical scheme to the ack/nack signal transmission that how to meet single-carrier property in this case.
In fact, those skilled in the art may expect adopting following scheme to solve: in the UL subframe, set a plurality of ACK/NACK zone, the corresponding descending sub frame in each zone; Adopt the method for FDD system then, still, owing to must carry out resource distribution according to maximum U E quantity; Resource occupation is many like this; And the situation that a plurality of UE send ACK/NACK simultaneously in the practical application seldom, therefore, causes the very big wasting of resources.In addition, when a UE when a plurality of descending sub frames all have transmission of data blocks, a plurality of ACK/NACK are mapped to a plurality of zones, can destroy up single-carrier property.
In order to solve the problem that prior art exists; The present invention provides a kind of improved technical scheme, and its basic thought is: network side judges whether certain subscriber equipment downlink service data in preset associated period is repeatedly dispatched, if; When said preset associated period finishes; Confirm to be used for the physical resource of loading ACK/NACK, and send indication information, indication subscriber equipment feeding back ACK/NACK on said physical resource.Guaranteed single-carrier property.
At first can set up under the different time-gap ratio situation, confirm the corresponding relation of uplink ACK/NACK subframe and downlink business subframe, suppose that it is 3ms that subscriber equipment is handled the time of delay of a data block, ignores signal transmission delay.
The mapping relations of second type of frame structure such as table 1 are with shown in Figure 6.
Table 1
Wherein "
*" N-1 field in the presentation graphs 6, "
*" N-2 field in the presentation graphs 6, "-" representes that this subframe is a descending sub frame, " 0 " representes that this subframe does not have corresponding UL (up) ACK.
For the UL ACK/NACK that only shines upon a DL (Downlink, down link) time slot (being called single ACK/NACK situation), obviously can directly adopt the method for LTE FDD, set up corresponding relation with the control channel sequence number.When sub-frame of uplink during less than descending sub frame; Can only arrange a sub-frame of uplink need transmit a plurality of ACK signalings; For the up-downgoing ratio is three kinds of situation of 3: 4/, 2: 5 and 1: 6; A certain sub-frame of uplink need send the corresponding ACK/NACK signaling of 2,4,6 descending time slot data blocks, and these three kinds of situation are referred to as " many ACK/NACK situation ".
Under many ACK situation, for the bonding carrier characteristics, if a subscriber equipment has a plurality of ACK or NACK to send, must unified mapping.And if employing is like the method for the implicit mapping of FDD system employing; In order to guarantee to tackle various situation; Requirement eN B can discern the ACK/NACK of different user devices, need be used to send the channel resource of ACK/NACK to each user equipment allocation independently, fully.For example; Many ACK situation for LTE-TDD (FS2); Suppose that descending sub frame is maximum and support that the quantity of descending scheduling subscriber equipment is M, the channel resource that then need reserve is respectively 2M, 4M and 6M, and if take not according to maximum resource and to arrange channel; Because each subscriber equipment is not also known the situation of other subscriber equipmenies, so may produce conflict between the different user equipment.And in practical communication; Can not all be scheduled by all subscriber equipmenies at each descending time slot; If arrange channel so take according to maximum resource; The utilance that then means channel is extremely low, and especially for mini system bandwidth (for example 1.25M Hz or 2.5MHz) or in the current scheduling user amount of equipment seldom the time, the wasting of resources is very serious.
So for many ACK/NACK situation, the present invention adopts the method indication subscriber equipment of direct indication to carry out the ACK/NACK transmission, avoids the appearance of above-mentioned situation.For example, in the DL of eNB dispatch, increase the channel of its ACK feedback of specific bit indication.In order to make those skilled in the art better understand technical scheme of the present invention, be described in detail below in conjunction with accompanying drawing and embodiment.
Please refer to Fig. 7, be the flow chart of the embodiment one of the method for a kind of LTE-TDD of the present invention system indication ACK/NACK transmission.
Specifically may further comprise the steps:
Step S101: each user's equipment downward business datum distribution situation of network side statistics.
Step S102: whether the downlink service data of judging each subscriber equipment is scheduled, if, get into step S103, otherwise, wait for.
Step S103: judge whether same subscriber equipment is repeatedly dispatched in preset associated period, if get into step S104; Otherwise, get into step S106.
Step S104: confirm the number of times that is scheduled, and then definite target physical resource, get into step S105.
If subscriber equipment has just been explained its ACK/NACK channel that need utilize quantity to equate with scheduling times simultaneously by repeatedly scheduling.So said target physical resource is exactly the physical resource that corresponding ack channel quantity is greater than or equal to said scheduling times.
Step S105: when said preset associated period finishes, send an ACK indication information, finish.
Said ACK indication information is used to indicate subscriber equipment on said physical resource, to feed back to the repeatedly ACK or the NACK of scheduling in the said preset associated period.
Step S106: send the ACK indication information, finish.
Need to prove that said preset associated period can be adjusted according to user's request or network practical operation situation.
The embodiment of the invention is through setting an associated period, and whether judges equipment is repeatedly dispatched in this associated period, if; After then the last scheduling in this associated period is accomplished; Send an ACK indication information, this user all scheduling in said associated period are unified to arrange, thus; Guarantee single-carrier property, and reduced the number of times that sends the ACK indication information.
Through a concrete example present technique scheme is further explained below:
Please refer to Fig. 8, with the uplink and downlink timeslot ratio of second type of frame be 1: 6 be example, be labeled as the corresponding uplink ACK/NACK of down2 descending time slot among the figure and all send at the ascending time slot that is being labeled as up2, all the other are similar.Suppose that network side judges certain subscriber equipment and in an associated period (be made as down2 form 6 descending time slots), 3 scheduling are arranged, respectively constantly, dispatch, 3 ACK indication informations are arranged respectively for then corresponding these three times at t1, t2 and t3.Wherein, ACK indication information 1 comprises the ACK/NACK channel Mapping of this time slot packet (being made as packet 1) to be arranged; Network side is after carrying out the scheduling second time to this subscriber equipment; Utilize ACK indication information 2 to upgrade said ACK indication information 1, said ACK indication information comprises the packet (being made as packet 2) and the packet 1 corresponding ACK/NACK channel Mapping of this time slot simultaneously to be arranged; Same; Network side is after dispatching this subscriber equipment for the third time; Utilize ACK indication information 3 to upgrade ACK indication information 2, said ACK indication information 3 comprises packet (being made as packet 3), packet 1 and the packet 2 corresponding ACK/NACK channel Mapping of this time slot to be arranged.
When said associated period finished, network side sent to subscriber equipment with said ACK indication information 3, and subscriber equipment receives behind this ACK indication information 3 can be according to specified ACK/NACK channel feedback ACK/NACK wherein.
Can find out that the embodiment of the invention can guarantee up single-carrier property according to the unified ack channel of arranging of the scheduling situation of the subscriber equipment in the associated period.
Need to prove that the mode that network side sends the ACK indication information can be: in the DL dispatch, increase the channel of its ACK feedback of specific bit indication.In addition, also can send through the mode of BCH broadcasting.
Fig. 9 shows the flow chart of confirming the target physical resource among the step S104 of the foregoing description.
Network side can be in advance carry out different resources according to the number of loading ACK signal and divide into groups, and corresponding certain subscriber equipment of each group resource for example for second type of frame, can be set at 6 ack signals of a resource bearing or still less.If a certain subscriber equipment need feed back a plurality of ACK simultaneously, for the bonding carrier characteristics, all ack signals of this subscriber equipment need utilize a physical resource to send.
This flow process specifically may further comprise the steps:
Step S201: the ack channel number of confirming needs according to the number of times of dispatching user facility.
Step S202: confirm the ack channel resource group that this user is corresponding according to user device parameters.
Said user device parameters comprises and is used to indicate this subscriber equipment to belong to the information of which ack channel resource group.Ack channel resource group is called for short the ACK group.
Step S203: judge in this ACK group whether have enough idle channels, if get into step S204; Otherwise, get into step S205.
Step S204: be this user equipment allocation ack channel, finish.
Step S205: search for other ACK groups, judge whether to exist enough idle channels, if get into step S206; Otherwise, get into step 207.
Step S206: the ack channel resource that channel allocation ack channel resource, and release for this reason originally took, finish.
Step S207: definite no ack channel can be used, and this packet is not scheduled, and finishes.
Network side is according to the updating network parameters as a result of above-mentioned flow process, and sends corresponding information and give scheduler, and said network parameter comprises all user device parameters.Scheduler is attached to ACK on the DL dispatch and sends to subscriber equipment.
Need to prove that the present invention is equally applicable to first kind frame.
Corresponding with said method, the invention also discloses the device that a kind of LTE-TDD indication ACK/NACK of system transmits, it is arranged in the network equipment, for example is present among the eNB.
Please refer to Figure 10, be the structural representation of the embodiment one of the device of a kind of LTE-TDD of the present invention system indication ACK/NACK transmission.
This device comprises first processing unit 100, second processing unit 200 and the 3rd processing unit 300.
Its operation principle and the course of work are following:
First processing unit, 100 each user's equipment downward business datum distribution situation of statistics, and calculate in preset associated period the number of times that the user's equipment downward data are scheduled.Said second processing unit 200 obtains the result of first processing unit 100, when knowing that the user's equipment downward data are repeatedly dispatched in said preset associated period, confirms to be used for the physical resource of loading ACK/NACK according to scheduling times.Said the 3rd processing unit 300 obtains the physical resource that said second processing unit 200 is confirmed, sends indication information, on said physical resource, transmits to the ACK/NACK of said downlink service data to indicate this subscriber equipment.
Need to prove that said preset associated period can be adjusted according to user's request or network practical operation situation.
In addition, need to prove also that the mode that said the 3rd processing unit sends indication information is:, or send with the mode of broadcasting through broadcast channel through the mode of extra additional indication information in descending control signaling.
Whether the embodiment of the invention is through judging in preset associated period by repeatedly scheduling; If, then confirm physical resource according to scheduling times, and after the last scheduling completion in this associated period; Send an ACK indication information; This user all scheduling in said associated period are unified to arrange, thus, guaranteed single-carrier property.
What the foregoing description one was directed against is the situation of the descending sub frame quantity of LTE-TDD system more than sub-frame of uplink quantity.Introduce a kind of situation that is not only applicable to descending sub frame quantity more than sub-frame of uplink quantity below, be applicable to that also descending sub frame quantity is less than the situation of sub-frame of uplink quantity.
Figure 11 shows the structural representation of embodiment two of the device of a kind of LTE-TDD of the present invention system indication ACK/NACK transmission.
On the basis of the foregoing description, can also comprise that manages unit 400 everywhere.
Said the manages unit 400 everywhere is used for being less than or during descending sub frame quantity, adopting the mode of implicit mapping when descending sub-frame number, sends indication information.The mode of said implicit mapping is specially: the indication information that will comprise the mapping relations of shared physical resource of the descending control signaling that presets and ACK/NACK sends to subscriber equipment through descending control signaling, indicates this subscriber equipment according to said mapping relations feeding back ACK/NACK on corresponding physical resource.
Figure 12 shows the structural representation of second processing unit of embodiment three of the device of a kind of LTE-TDD of the present invention system indication ACK/NACK transmission.
Said second processing unit 200 comprises: unit 212 is confirmed with physical resource in information reference unit 211.
Said information reference unit 211 is used to preserve the physical resource of foundation in advance and the corresponding relation of ack channel, the corresponding physical resource of the ack channel of predetermined number.
Said physical resource confirms that unit 212 is used for the number of times that is scheduled according to subscriber equipment downlink service data in preset associated period; Select to have physical resource, it is confirmed as the physical resource that is used for loading ACK/NACK more than perhaps equaling the free ACK channels of said scheduling times.
The embodiment of the invention can be in LTE-TDD system descending sub-frame number during more than sub-frame of uplink quantity; Need feed back under the situation of a plurality of ACK/NACK simultaneously at subscriber equipment; In advance physical resource is unified to arrange; The a plurality of ACK/NACK that guarantee subscriber equipment transmit on same physical resource, have guaranteed single-carrier property thus.
More than disclosedly be merely preferred implementation of the present invention; But the present invention is not limited thereto; Any those skilled in the art can think do not have a creationary variation, and, all should drop in protection scope of the present invention not breaking away from some improvement and the retouching of being done under the principle of the invention prerequisite.
Claims (10)
1. the method for the indication ACK/NACK of long-term advancing time division duplex LTE-TDD system transmission is characterized in that, comprising:
Each user's equipment downward business datum distribution situation of network side statistics;
Confirmed to be used for the physical resource of loading ACK/NACK by after the scheduling repeatedly judging certain subscriber equipment downlink service data in preset associated period;
Sending indication information transmits on said physical resource to the ACK/NACK of said downlink service data to indicate this subscriber equipment;
Concrete, confirm to be used for the physical resource of loading ACK/NACK according to following steps:
Set up the corresponding relation of physical resource and ack channel in advance, the corresponding physical resource of the ack channel of predetermined number;
Confirm the number of times that is scheduled of subscriber equipment downlink service data in preset associated period, select to have physical resource, it is confirmed as the physical resource that is used for loading ACK/NACK more than perhaps equaling the free ACK channels of said scheduling times.
2. the method for claim 1 is characterized in that, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
3. the method for claim 1 is characterized in that, network side is through extra additional Indication message in descending control signaling, the physical resource of informing subscriber equipment feeding back ACK/NACK; Perhaps, network side sends indication information, the physical resource of informing subscriber equipment feeding back ACK/NACK through broadcast channel.
4. method as claimed in claim 3 is characterized in that, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
5. method as claimed in claim 4 is characterized in that, when descending sub-frame number is less than sub-frame of uplink quantity:
Network side is provided with the mapping relations of the shared physical resource of descending control signaling and feeding back ACK/NACK channel in advance;
Said mapping relations are sent through descending control signaling, and the indication subscriber equipment is according to said mapping relations feeding back ACK/NACK on corresponding physical resource.
6. the device of the indication ACK/NACK of long-term advancing time division duplex LTE-TDD system transmission is characterized in that, comprising:
First processing unit is used to add up each user's equipment downward business datum distribution situation, and calculates in preset associated period the number of times that the user's equipment downward data are scheduled;
Second processing unit is used for when the user's equipment downward data are repeatedly dispatched, confirming to be used for the physical resource of loading ACK/NACK in said preset associated period;
The 3rd processing unit is used to send indication information, on said physical resource, transmits to the ACK/NACK of said downlink service data to indicate this subscriber equipment;
Concrete, said second processing unit comprises:
The information reference unit is used to preserve the physical resource of foundation in advance and the corresponding relation of ack channel, the corresponding physical resource of the ack channel of predetermined number;
Physical resource is confirmed the unit; Be used for the number of times that is scheduled according to subscriber equipment downlink service data in preset associated period; Select to have physical resource, it is confirmed as the physical resource that is used for loading ACK/NACK more than perhaps equaling the free ACK channels of said scheduling times.
7. device as claimed in claim 6 is characterized in that, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
8. device as claimed in claim 6 is characterized in that, said indication information is an extra additional indication information in the descending control signaling, or is carried on the indication information on the broadcast channel.
9. device as claimed in claim 8 is characterized in that, the descending sub frame quantity of said LTE tdd systems is more than sub-frame of uplink quantity.
10. device as claimed in claim 9 is characterized in that, also comprises:
Manages the unit everywhere; Be used for when descending sub-frame number is less than sub-frame of uplink quantity; The indication information that will comprise the mapping relations of shared physical resource of the descending control signaling that presets and ACK/NACK sends to subscriber equipment through descending control signaling, indicates this subscriber equipment according to said mapping relations feeding back ACK/NACK on corresponding physical resource.
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| CN101873610B (en) * | 2009-04-27 | 2013-05-29 | 电信科学技术研究院 | Method and device for allocating resources |
| WO2010133031A1 (en) * | 2009-05-21 | 2010-11-25 | 华为技术有限公司 | Method, device and system for allocating an ack channel under carrier aggregation |
| CN101594209A (en) * | 2009-06-18 | 2009-12-02 | 中兴通讯股份有限公司 | The sending method of feedback states and terminal |
| EP3043590B1 (en) * | 2009-10-02 | 2017-04-26 | Sun Patent Trust | Terminal device and retransmission control method |
| CN102082641B (en) * | 2010-02-11 | 2016-01-20 | 电信科学技术研究院 | The method of the many bit ACK/nack messages of a kind of transmission and device |
| CN104812098B (en) * | 2014-01-24 | 2018-04-27 | 中国科学院计算技术研究所 | Base station protocol processing method and system in centralized base station framework |
| US10624087B2 (en) * | 2016-04-07 | 2020-04-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio-network node, wireless device and methods for feedback-based retransmission |
| EP3531599A4 (en) * | 2016-11-04 | 2019-11-06 | Huawei Technologies Co., Ltd. | Harq-ack feedback information transmission method and related apparatus |
| WO2019157683A1 (en) | 2018-02-13 | 2019-08-22 | 华为技术有限公司 | Method and apparatus for transmitting uplink control information |
| CN111835478B (en) * | 2019-04-23 | 2021-07-23 | 大唐移动通信设备有限公司 | PUCCH resource allocation method and device |
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