CN101621849B - Feedback method of downlink data receiving state - Google Patents
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- CN101621849B CN101621849B CN2008101282137A CN200810128213A CN101621849B CN 101621849 B CN101621849 B CN 101621849B CN 2008101282137 A CN2008101282137 A CN 2008101282137A CN 200810128213 A CN200810128213 A CN 200810128213A CN 101621849 B CN101621849 B CN 101621849B
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Abstract
The invention discloses a feedback method of downlink data receiving state. When a base station needs to transmit downlink data to a terminal, the downlink resource allocation control signalling of the terminal is transmitted in a physical downlink control channel; the base station judges whether a subframe upper terminal of the feedback downlink data receiving state of the terminal, which expects to be received, transmits uplink data on a physical uplink shared channel of the subframe or not, if yes, the base station transmits the uplink dispatching authorization signalling of the terminal in the downlink control channel; the signalling comprises a first information zone which indicates whether the downlink resource allocation control signalling of the terminal exists or not; after the terminal receives the signalling, the terminal reserves resource feeding back the downlink data receiving state on the uplink shared channel to feed back the receiving state of the downlink data when the first information zone indicates that the downlink resource allocation control signalling of the terminal exists. In the invention, when the physical uplink shared channel needs to be used to transmit the downlink data receiving state, the base station can acquire whether the terminal detects the downlink resource allocation control signalling or not.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of feedback method of downlink data receiving state.
Background technology
In the current radio digital communication system, for under abominable channel, especially in high data rate or the high-speed mobile environment, provide reliability high data communication, (HybridAutomatic Repeat Request, HARQ) technology is a kind of error-control technique that generally adopts to mix automatic request retransmission.
In the HARQ mode, the sign indicating number that transmitting terminal sends not only can detect mistake, but also have certain error correcting capability.After the receiving terminal decoder is received code word, at first check error situation, if in the error correcting capability of sign indicating number, then carry out error correction automatically, if mistake is a lot, surpassed the error correcting capability of sign indicating number, come out but can detect mistake, then receiving terminal sends a decision signal by feedback channel to transmitting terminal, requires the transmitting terminal retransmission of information.
At present, at LTE (Long Term Evolution, Long Term Evolution) in the system, carry out error control with the HARQ technology, be by control signaling ACK (Acknowledgement, correctly reply signaling) or NACK (Non-acknowledgement, the non-signaling of correctly replying) come the correct or mistake of feedback transmission, need to judge whether to retransmit with this.
Terminal is to control signaling by its downlink resource distribution to obtain the transmission resource location of one's own downlink data on Physical Shared Channel (PDSCH), and downlink resource distributes the control signaling bear on Physical Downlink Control Channel (PDCCH), and terminal is sought the Physical Downlink Control Channel that sends to oneself by the mode of blind Detecting.Because wireless channel environment more complicated, under some abominable transmission conditions, terminal detects probably less than the Physical Downlink Control Channel of issuing oneself, just lose the downlink resource of oneself and distributed the control signaling, thereby do not know the resource location of the downlink data of oneself, terminal just can not removed to receive the downlink data to oneself like this, just can not feed back the affirmation message of corresponding downstream Data Receiving yet.Distribute the control signaling if terminal has detected the downlink resource of oneself, will on PDSCH, receive the downlink data of oneself, according to reception condition, feedback acknowledgment information A CK or NACK.Therefore, system needs establishment of a mechanism, effective these two kinds of downlink data receiving states of feeding back ACK or NACK can also guarantee that the base station can know whether terminal has detected the downlink resource that belongs to it and distributed the control signaling on Physical Downlink Control Channel.
For downlink data transmission, current LTE system regulation, if being authorized on the capable physically shared channel (PUSCH) by its uplink scheduling authorization signaling (Uplink scheduling grant), terminal have resource to be used for the upstream data transmission, comprise dynamic dispatching and semi-continuous scheduling, the PUSCH transmitted over resources that terminal just must oneself authorized for the affirmation message (ACK or NACK) of the downlink data that oneself receives, that is to say, terminal is on the subframe (Sub-frame) that sends the downlink data acknowledge message, there is the PUSCH resource to send upstream data if terminal possesses simultaneously on this subframe, so the affirmation information of the terminal downlink data that just should receive in this terminal of this PUSCH transmitted over resources.Otherwise terminal just should be gone control channel (PUCCH) physically and be gone up the affirmation message that transmitting downlink data receives.
Two kinds of current LTE system send in the mode of downlink data confirmation of receipt information, when in the affirmation message of downlink data is gone control channel physically, transmitting, the base station can judge whether the user has sent the affirmation message of downlink data by the method for blind Detecting Physical Uplink Control Channel, thereby, can know whether terminal has detected the downlink resource that belongs to it on the PDCCH and distributed the control signaling.But, when in the affirmation message of downlink data should be gone shared channel physically, transmitting, technical specification (Technical Specification) according to present LTE, the base station can't detect terminal and whether correctly receive the downlink resource distribution control signaling that belongs to it on the PDCCH, because confirmation ACK or NACK transmit by some upstream data symbols of destroying on the PUSCH, terminal does not detect the downlink resource distribution control signaling of oneself if the base station has sent downlink data, the nature terminal does not receive any information just can not feed back any confirmation yet, just terminal is thought interrupted emission (DiscontinuousTransmission, abbreviate DTX as), thereby should send the place of confirmation ACK or NACK on the PUSCH resource of this terminal, what send all is upstream data, but this moment, the base station still can go to receive the affirmation information of oneself on the PUSCH resource, the affirmation information of upstream data being treated as downlink data that will be wrong, thereby can become ACK or NACK by flase drop, just the base station might terminal do not receive downlink resource distribute the control signaling the situation mistake think correct reception (the DTX error detection becomes ACK), because the last employing of PUSCH all is common coded modulation, it is that the possibility of ACK is still bigger that descending acknowledge message is misread into DTX in the base station, the information that the data block that obtaining of causing that terminal can not be correct receives is transmitted, need the more high-rise retransmission process of carrying out, this has just increased extra time-delay and complexity, and this is that system is unacceptable.
The problem that occurs when transmitting in the capable physically shared channel of affirmation message at above-mentioned downlink data, whether a solution of discussing in 3GPP (third generation partner program) meeting is to increase 1bit (bit) in the uplink scheduling authorization signaling of passing through in terminal to indicate this terminal to have downlink resource to distribute the control signaling at present, notifies terminal whether should reserve the resource that sends confirmation at PUSCH by this 1bit.In this way, as long as the uplink scheduling authorization signaling that sends to this terminal is arranged, even if detecting the downlink resource of oneself, terminal do not distribute the control signaling, also can know it oneself is to have lost downlink resource to distribute control signaling rather than base station not to send by the indication in this uplink scheduling authorization signaling, terminal can go physically still that reserved resource reports downlink data receiving state rather than all is used to send upstream data in the shared channel so, thereby the base station just can know whether terminal detects the downlink resource of issuing it and distribute the control signaling, just terminal is except sending ACK or NACK state, indication by the uplink scheduling authorization signaling, can also be on PUSCH reserved resource sending the DTX state, thereby the base station known lost terminal downlink resource distribute the control signaling.
But, at present in the LTE system, when terminal is when sending semi-continuous scheduling data or data retransmission, might not follow the transmission of uplink scheduling authorization signaling, under this scene, can not correctly report the state of own downlink data receiving on the capable physically shared channel of terminal equally, the base station just can't know definitely also whether terminal detects the downlink resource of issuing oneself and distribute the control signaling.In addition, in LTE time division duplex (LTE TDD) system, a terminal exists a Physical Uplink Shared Channel need send the situation of the affirmation information of a plurality of descending sub frames, only increases by 1 bit information this moment in the uplink scheduling authorization signaling and possibly can't solve the problem that reports that downlink resource distributes the control signaling of losing.Therefore in the present LTE system on PUSCH the mode of feeding back downlink data receiving state also need a step perfect.
Summary of the invention
The technical problem to be solved in the present invention is the feedback method that proposes a kind of downlink data receiving state, the base station can't know whether terminal detects downlink resource and distribute the control signaling in the existing feedback method of solution, whether correctly receive data, thereby can not in time carry out the problem of data re-transmission.
In order to solve the problems of the technologies described above, the invention provides a kind of feedback method of downlink data receiving state, when the base station will send downlink data to terminal, the downlink resource that sends this terminal at Physical Downlink Control Channel distributed the control signaling, also comprise,
The base station is judged whether the base station will dispatch this terminal on the subframe of downlink data receiving state of this terminal feedback that its expectation receives and send upstream data on the Physical Uplink Shared Channel of this subframe, if, the uplink scheduling authorization signaling of this terminal is given in described base station at described Physical Downlink Control Channel beard and hair, comprise a first information territory in the described uplink scheduling authorization signaling, indicate the downlink resource that whether has this terminal on the described Physical Downlink Control Channel to distribute the control signaling;
After terminal is received this uplink scheduling authorization signaling, if described first information territory indicates the downlink resource that has this terminal on the described Physical Downlink Control Channel to distribute the control signaling, reserve the resource of feeding back downlink data receiving state on the capable physically shared channel of described terminal, feeding back downlink data receiving state on this resource.
Further, said method also can have following characteristics, and described upstream data is the data retransmission of up semi-continuous scheduling, up many subframe binding transmission, up dynamic dispatching data or these scheduling forms.
Further, said method also can have following characteristics, and described first information territory is 1 bit.
Further, said method also can have following characteristics, if described base station expectation terminal is fed back the accepting state of a plurality of downlink datas on described Physical Uplink Shared Channel, second information field of one N bit also is set in described uplink scheduling authorization signaling, indicate the resource number K of the downlink data receiving state of reserving on the capable physically shared channel of described terminal, described terminal is gone K reserved resource on the shared channel physically and is fed back the accepting state of K downlink data, and wherein 2
N〉=K.
Further, said method also can have following characteristics, and described base station is the blind Detecting Physical Uplink Shared Channel on the subframe of this terminal downlink data receiving state that expectation receives, and obtains downlink data receiving state.
Further, said method also can have following characteristics, if the base station is judged on the subframe of the downlink data receiving state that this terminal of its expectation reception is fed back, the base station is not dispatched this terminal and send upstream data on the Physical Uplink Shared Channel of this subframe, feeding back downlink data receiving state on the capable physically control channel of described terminal, the base station obtains downlink data receiving state by blind Detecting Physical Uplink Control Channel on the subframe of this terminal feeding back downlink data receiving state of expecting to receive.
Further, said method also can have following characteristics, and described method is applicable to long term evolution TDD system and/or Long Term Evolution frequency division duplex system.
The present invention can guarantee in the LTE system, use Physical Uplink Shared Channel to send all situations of downlink data receiving state for need, the base station can know accurately whether terminal detects the base station and issue its downlink resource distribution control signaling from Physical Uplink Shared Channel.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.
Fig. 1 is the frame structure schematic diagram of tdd systems among the LTE;
Fig. 2 is the embodiment of the invention one flow chart;
Fig. 3 is the frame structure schematic diagram of frequency division duplex system among the LTE;
Fig. 4 is the embodiment of the invention two flow charts.
Embodiment
Main design of the present invention is, when the base station needs dynamic dispatching ground when Physical Downlink Shared Channel (PDSCH) is gone up the downlink data of certain terminal of transmission, the base station distributes the control signaling to indicate the resource that sends downlink data by the downlink resource that the Physical Downlink Control Channel (PDCCH) that is associated with this PDSCH sends this terminal, simultaneously the base station is judged on the subframe at affirmation message (ACK or NACK) place of downlink data transmission of this terminal feedback that its expectation receives, whether this terminal has upstream data is gone up transmission with the Physical Uplink Shared Channel (PUSCH) that certain form is scheduled in this subframe, be whether the base station will dispatch this terminal send upstream data on the Physical Uplink Shared Channel of this subframe, the base station is that PUSCH goes up the scheduler that resource sends, so can know that PUSCH goes up this terminal and whether is assigned resource transmission upstream data, wherein, described upstream data comprises semi-continuous scheduling (Semi-persistent scheduling), up many subframe binding transmission (TTI bundling), re-transmission (Re-transmission) data of dynamic dispatching (Dynamic scheduling) or these scheduling forms.
If have, the base station also must send the uplink scheduling authorization signaling (Uplink scheduling grant) of this terminal simultaneously on the Physical Downlink Control Channel (PDCCH) that is associated with this PDSCH, and whether the information field that is provided with 1 bit in this uplink scheduling authorization signaling can be used to indicate this terminal to exist the downlink resource of self to distribute the control signaling on this PDCCH, promptly utilizes this bit to come indicating terminal whether should reserve the resource of feeding back downlink data receiving state on its PUSCH.
After terminal is received the uplink scheduling authorization signaling of oneself, if this signaling indicates this terminal to exist the downlink resource of self to distribute the control signaling on this PDCCH, reserved resource on its PUSCH, the accepting state of the downlink data transmission of transmission base station expectation.
Terminal can judge whether that the downlink resource of having lost oneself distributes the control signaling according to the uplink scheduling authorization signaling, if promptly this signaling indication exists downlink resource to distribute the control signaling on PDCCH, and terminal does not detect PDCCH, thereby lost downlink resource and distributed the control signaling, terminal can't downlink data receiving, when the feeding back downlink data receiving state, the feedback nack message, thereby on the PUSCH resource of reserving, send the accepting state of the downlink data of base station expectation accurately, solve actual this reception of original terminal but when not receiving downlink data, do not fed back the problem of receiving status information.And, among the present invention, when the upstream data of terminal transmission is semi-continuous scheduling or data retransmission, also send the uplink scheduling authorization signaling, solved in original technology when upstream data is semi-continuous scheduling or data retransmission, do not sent the uplink scheduling authorization signaling, the terminal that may occur does not receive downlink resource and distributes the control signaling, the feeding back downlink data receiving state does not cause the base station can't know whether terminal detects the problem that the downlink resource of issuing oneself distributes the control signaling.
In addition, further, if the base station is expected this terminal and feed back the accepting state of a plurality of downlink datas on same PUSCH, the information field of one n bit also need be set in the uplink scheduling authorization signaling in addition, the accepting state feedback resources numbering that is used for the downlink data transmission that indicating terminal reserves on PUSCH, just order is indicated last k the feedback resources of k downlink data transmission correspondence PUSCH, and wherein 2
n〉=k.
If no, the Physical Uplink Control Channel (PUCCH) of this terminal in the sub-frame of uplink of base station expectation gone up the accepting state that sends downlink data.This moment the base station can by the PUCCH blind Detecting know terminal whether with PDCCH that this downlink data transmission is associated on detected the downlink resource that belongs to it and distributed the control signaling.
Below in conjunction with embodiment technical solution of the present invention is described in further detail.
Embodiment 1
Fig. 1 shows Long Term Evolution (Long Term Evolution, abbreviate LTE as) system's time division duplex (Time Division Duplex, abbreviate TDD as) frame structure of pattern, in this frame structure, the radio frames of a 10ms (radio frame) is divided into two fields (half frame), it is the 0.5ms time slot that each field is divided into 10 length, and adjacent two time slots are formed the subframe that length is 1ms.In this frame structure, the configuration characteristics of subframe are:
(1) in order to reduce the configured number of ascending-descending subframes number, LTE TDD has stipulated the allocation plan of 7 kinds of ascending-descending subframes numbers in a radio frames, and is as shown in table 1, under the heterogeneous networks configuration mode, and the allocation plan of ascending-descending subframes in the radio frames.All subframes all are divided three classes, descending sub frame, special subframe and sub-frame of uplink, and wherein, D represents descending sub frame, and U represents sub-frame of uplink, and S represents special subframe.For example configuration mode is 1 o'clock, subframe #2, and #3, #7, #8 are sub-frame of uplink, subframe #0, #4, #5, #9 are descending sub frame, subframe #1, #6 are special subframe.
(2) special subframe comprises 3 special time slots; be respectively descending pilot frequency time slot (Downlink PilotTime Slot; abbreviate DwPTS as), protection (Guard Period abbreviates GP as) and uplink pilot time slot (Uplink Pilot Time Slot abbreviates UpPTS as) at interval.Wherein, DwPTS is used for descending, and a minimum symbol is used to transmit primary synchronization channel (Primary-Synchronization Channel abbreviates P-SCH as); GP is a guard time, does not transmit any data; UpPTS is used for up, can be used to transmit signals such as Random Access Channel (Random Access Channel abbreviates RACH as), detecting pilot frequency.
Table 1 LTE TDD up-downgoing proportional arrangement
DL/UL is than transfer point subframe numbers
Routine configuration cycle 0123456789
0 5ms D?S?U?U?U?D?S?U?U?U
1 5ms D?S?U?U?D?D?S?U?U?D
2 5ms D?S?U?D?D?D?S?U?D?D
3 10ms D?S?U?U?U?D?D?D?D?D
4 10ms D?S?U?U?D?D?D?D?D?D
5 10ms D?S?U?D?D?D?D?D?D?D
6 10ms D?S?U?U?U?D?S?U?U?D
In LTE TDD, subscriber equipment (User Equipment, abbreviate UE as) can be at Physical Uplink Control Channel (the Physical Uplink Control Channel of the sub-frame of uplink of subframe n+k (k＞3), abbreviate PUCCH as) in, to (the Physical DownlinkShared Channel of the Physical Downlink Shared Channel among the descending sub frame n, abbreviate PDSCH as) transmission data feedback acknowledgment information, correctly reply (ACK)/wrong responses (NACK); The accepting state that also can in this sub-frame of uplink, be used for the middle feeding back downlink subframe n of Physical Uplink Shared Channel (Physical Uplink Shared Channel abbreviates PUSCH as) of transmitting uplink data.But in LTE TDD, the number of subframes of descending distribution can be greater than the number of subframes of uplink assignment, promptly sub-frame of uplink need feed back the affirmation information of a plurality of PDSCH subframes, and table 2 shows under the difference configuration of table 1, the pairing descending sub frame number of sub-frame of uplink feeding back downlink PDSCH.
The descending sub frame number of correspondence during table 2 sub-frame of uplink feedback acknowledgment information
DL/UL is than all subframe numbers of transfer point
The example configuration phase 0123456789
0 -?-?1?-?1?-?-?1?-?1
1 5ms -?-?2?1?-?-?-?2?1?-
2 -?-?4?-?-?-?-?4?-?-
3 -?-?3?2?2?-?-?-?-?-
4 10ms -?-?4?4?-?-?-?-?-?-
5 -?-?9?-?-?-?-?-?-?-
6 -?-?1?1?1?-?-?1?1?-
Below be example just with DL/UL proportional arrangement 3, further specify the application of the present invention in LTE TDD, as shown in Figure 2, comprise following steps:
Step 101: according to LTE TDD DL/UL proportional arrangement, base station and terminal are all known the timing relationship (as table 1,2) of predefined HARQ feedback and the numbering of ascending-descending subframes, and all are caught up with the relevant parameter of downstream arrangements and all dispose down.
Step 102: the base station will be at the descending sub frame #5 of certain radio frames m, #6, last certain terminal of giving of #7 sends the dynamic dispatching downlink data, the base station must be at the descending sub frame #5 of radio frames m so, #6, the downlink resource that sends this terminal on the PDCCH on the #7 respectively distributes control signaling, the resource location of indicating downlink data.
Step 103: according to the descending HARQ feedback timing of DL/UL proportional arrangement 3, the descending sub frame #5 of radio frames m, #6, the feedback of #7 corresponding downlink data accepting state should be on the subframe #2 of next radio frames m+1, and the subframe #2 of radio frames m+1 goes up this terminal and whether be assigned resource transmission upstream data in some way on PUSCH under the pre-judgement in base station at this moment, comprises semi-continuous scheduling, up many subframe binding transmission, dynamic dispatching or any type of re-transmission, if having, execution in step 104; If no, execution in step 106.
Step 104: the base station also must be at the subframe #5 of radio frames m, #6, send the uplink scheduling authorization signaling of this terminal on the PDCCH on the #7 respectively, system also must be in the uplink scheduling authorization signaling pre-defined two message fields: whether the information field A indicating terminal of one 1 bit exists the downlink resource of self to distribute the control signaling on this PDCCH, here suppose that 1 expression exists, 0 expression does not exist; The information field B of one 2 bit represents the DL/UL proportional arrangement 3 times, and terminal is fed back the accepting state that is no more than 4 descending sub frames on a PUSCH, and the numbering of information field B is indicated the numbering of PUSCH feedback resources simultaneously in proper order here.Then base station PDCCH that subframe #5 is set respectively goes up in the uplink scheduling authorization signaling of this terminal, and information field A is set to 1, and information field B is set to 00; The PDCCH that subframe #6 is set goes up in the uplink scheduling authorization signaling of this terminal, and information field A is set to 1, and information field B is set to 01; The PDCCH that subframe #7 is set goes up in the uplink scheduling authorization signaling of this terminal, and information field A is set to 1, and information field B is set to 10, execution in step 105;
Step 105, terminal send the subframe #5 of radio frames m, #6, the downlink data receiving state of #7 on the PUSCH of the subframe #2 of radio frames m+1.Terminal is according to the subframe #5 of radio frames m, #6, uplink scheduling authorization signaling on the #7, no matter at #5, whether #6 detects downlink resource and distributes the control signaling on the #7, all in the subframe #2 of radio frames m+1, reserve 3 accepting state feedback resources, the accepting state of the downlink data of the 1st feedback subframe #5, the accepting state of the downlink data of the 2nd feedback subframe #6, the accepting state of the downlink data of the 3rd feedback #7.Then the base station is detected the subframe #5 of radio frames m respectively on the feedback resources that terminal on the PUSCH of the subframe #2 of radio frames m+1 is reserved, and 3 kinds of accepting state: DTX of 6,7 or ACK or NACK finish.
Step 106: terminal sends the subframe #5 of radio frames m, #6, the downlink data receiving state of #7 on the PUCCH of the subframe #2 of radio frames m+1.Downlink data receiving state is determined by blind Detecting PUCCH in the base station on the subframe #2 of radio frames m+1, finish.
Embodiment 2
Fig. 3 shows Long Term Evolution (Long Term Evolution, abbreviate LTE as) system's Frequency Division Duplexing (FDD) (Frequency Division Duplex, abbreviate FDD as) frame structure of pattern, in this frame structure, the radio frames of a 10ms (radio frame) is divided into two fields (half frame), and it is the 1ms subframe that each field is divided into 5 length.What LTE FDD up-downgoing was adopted is different band resources, the subframe numbering also is identical, so its uplink and downlink are symmetrical fully, sub-frame of uplink and descending sub frame can be accomplished corresponding one to one completely, can not exist a sub-frame of uplink to feed back the situation of a plurality of descending sub frame accepting states, the timing of the HARQ of LTE FDD just is one to one.According to LTE FDD predetermined process time delay 3ms, the accepting state of descending sub frame #k, terminal should be fed back on sub-frame of uplink #k+4.
As shown in Figure 4, the embodiment of the invention two further illustrates the application of the present invention in LTE FDD, comprises:
Step 201: the base station sends the dynamic dispatching downlink data on descending sub frame certain terminal, just trigger descending dynamic dispatching, the base station sends the downlink resource distribution control signaling of this terminal, the resource location of indicating downlink data on the PDCCH on the descending sub frame #k so.
Step 202: the base station judges that in advance sub-frame of uplink #k+4 goes up this terminal and whether be assigned resource transmission upstream data in some way on PUSCH, comprise whether up semi-continuous scheduling is arranged, whether up dynamic dispatching is arranged, whether up many subframe binding transmission are arranged, whether the re-transmission of up semi-continuous scheduling data or the re-transmission of up dynamic dispatching data are arranged.If there is wherein any upstream data to send, execution in step 203, if do not have, execution in step 205.
Step 203: the base station also must send the uplink scheduling authorization signaling of this terminal at descending sub frame #k, system also must be in the uplink scheduling authorization signaling a pre-defined message field: whether the information field A indicating terminal of 1 bit exists the downlink resource of self to distribute the control signaling on the PDCCH of descending sub frame #k, here suppose that 1 expression exists, 0 expression does not exist; Then this information field in the uplink scheduling authorization signaling of descending sub frame #k is set is 1 in the base station, execution in step 204;
Step 205: terminal is at the downlink data receiving state that sends on the PUCCH of sub-frame of uplink #k+4 on the descending sub frame #k.Downlink data receiving state is determined by blind Detecting PUCCH in the base station on sub-frame of uplink #k+4, finish.
From the foregoing description as can be seen, the technical program can guarantee in the LTE system, for using Physical Uplink Shared Channel to send all situations of downlink data receiving state, the base station can know accurately whether terminal detects the base station and issue its downlink resource distribution control signaling from Physical Uplink Shared Channel.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (7)
1. the feedback method of a downlink data receiving state, when the base station will send downlink data to terminal, the downlink resource that sends this terminal at Physical Downlink Control Channel distributed the control signaling, it is characterized in that, also comprise,
The base station is judged whether the base station will dispatch this terminal on the subframe of downlink data receiving state of this terminal feedback that its expectation receives and send upstream data on the Physical Uplink Shared Channel of this subframe, if, the uplink scheduling authorization signaling of this terminal is given in described base station at described Physical Downlink Control Channel beard and hair, comprise a first information territory in the described uplink scheduling authorization signaling, indicate the downlink resource that whether has this terminal on the described Physical Downlink Control Channel to distribute the control signaling;
After terminal is received this uplink scheduling authorization signaling, if described first information territory indicates the downlink resource that has this terminal on the described Physical Downlink Control Channel to distribute the control signaling, reserve the resource of feeding back downlink data receiving state on the capable physically shared channel of described terminal, feeding back downlink data receiving state on this resource.
2. the method for claim 1 is characterized in that, described upstream data is the data retransmission of up semi-continuous scheduling, up many subframe binding transmission, up dynamic dispatching data or these scheduling forms.
3. the method for claim 1 is characterized in that, described first information territory is 1 bit.
4. as claim 1 or 2 or 3 described methods, it is characterized in that, if described base station expectation terminal is fed back the accepting state of a plurality of downlink datas on described Physical Uplink Shared Channel, second information field of one N bit also is set in described uplink scheduling authorization signaling, indicate the resource number K of the feeding back downlink data receiving state of reserving on the capable physically shared channel of described terminal, described terminal is gone K reserved resource on the shared channel physically and is fed back the accepting state of K downlink data, and wherein 2
N〉=K.
5. as claim 1 or 2 or 3 described methods, it is characterized in that described base station is the blind Detecting Physical Uplink Shared Channel on the subframe of the downlink data receiving state of this terminal feedback that expectation receives, and obtains downlink data receiving state.
6. the method for claim 1, it is characterized in that, if the base station is judged on the subframe of the downlink data receiving state that this terminal of its expectation reception is fed back, the base station is not dispatched this terminal and send upstream data on the Physical Uplink Shared Channel of this subframe, feeding back downlink data receiving state on the capable physically control channel of described terminal, the base station obtains downlink data receiving state by blind Detecting Physical Uplink Control Channel on the subframe of this terminal feeding back downlink data receiving state of expecting to receive.
7. as claim 1,2,3 or 6 described methods, it is characterized in that described method is applicable to long term evolution TDD system and/or Long Term Evolution frequency division duplex system.
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| US9337962B2 (en) | 2010-02-17 | 2016-05-10 | Qualcomm Incorporated | Continuous mode operation for wireless communications systems |
| CN108900288B (en) * | 2010-04-06 | 2023-09-05 | 北京璟石知识产权管理有限公司 | Channel state information transmission method, device and computer readable storage medium |
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