CN104378182A - Method and device for sending downlink data - Google Patents
Method and device for sending downlink data Download PDFInfo
- Publication number
- CN104378182A CN104378182A CN201310351329.8A CN201310351329A CN104378182A CN 104378182 A CN104378182 A CN 104378182A CN 201310351329 A CN201310351329 A CN 201310351329A CN 104378182 A CN104378182 A CN 104378182A
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- subframe
- harq process
- occur
- special subframe
- wait
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
Abstract
The invention provides a method and device for sending downlink data, and belongs to the technical field of communication. The method comprises the steps that the type of each subframe with initial transmission is recorded as a conventional subframe or a special subframe; whether the currently-dispatched downlink subframe is the conventional subframe or the special subframe is judged, the to-be-retransmitted HARQ process with the conventional subframe initially transmitted is dispatched if the currently-dispatched downlink subframe is the conventional subframe, and the to-be-retransmitted HARQ process with the special subframe to be initially transmitted is dispatched if the currently-dispatched downlink subframe is the special subframe. According to the method and device for sending the downlink data, it is guaranteed that initial transmission and retransmission happen to the subframes of the same type, and therefore resource waste is avoided, and the system error rate is reduced.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of downlink data transmission method and device.
Background technology
At LTE(Long Term Evolution, Long Term Evolution) in system, LTE interface supports Type1FDD(Frequency Division Duplexing aloft, Frequency Division Duplexing (FDD)) and Type2TDD(Time Division Duplexing, time division duplex) two kinds of frame structures, and in Type2TDD frame structure, there is the special subframe of 1ms and multiple conventional subframe.In downlink data process of transmitting, according to timing relationship, descending sub frame different HARQ(Hybrid Automatic RepeatRequest, hybrid automatic repeat-request) ACK(Acknowledgement of process, affirmative acknowledgement)/NACK(Negative Acknowledgement, negative response) feed back on same sub-frame of uplink, simultaneously, down direction adopts adaptive HARQ mechanism, has multiple HARQ and carry out wait re-transmission in same descending scheduling subframe.
In order to reduce propagation delay time, in the prior art, after just having passed, according to waiting that retransmitting first biography moment sequencing corresponding to HARQ process will wait that retransmitting HARQ process retransmits successively.For upstream and downstream proportioning for 1, as shown in Figure 1, wherein, D is descending conventional subframe, and S is special subframe, and U is sub-frame of uplink, the uplink ACK/NACK of D0 to be HARQ process 0, A/N0,1 be descending HARQ process 0,1 downlink data.In first biography process, descending conventional subframe 0 transmitting HARQ process 0, special subframe 1 transmitting HARQ process 1, descending conventional subframe 4 transmitting HARQ process 2, descending conventional subframe 5 transmitting HARQ process 3, special subframe 6 transmitting HARQ process 4, descending conventional subframe 9 transmitting HARQ process 5, in retransmission processes, first biography moment corresponding to HARQ process from morning to night will wait that retransmitting HARQ process retransmits successively, therefore, special subframe 1 retransmits HARQ process 0, descending conventional subframe 4 retransmits HARQ process 1, descending conventional subframe 5 retransmits HARQ process 2, special subframe 6 retransmits HARQ process 3, descending conventional subframe 9 retransmits HARQ process 4, descending conventional subframe 0 retransmits HARQ process 5.
But prior art does not consider the feature of HARQ process in the subframe of just biography moment generation.For downlink data transmission, available resources in special subframe are than few in conventional subframe, if, the first biography moment of HARQ process occurs in conventional subframe, the distribution available resources then obtained are more, and retransmission time occurs in special subframe, then the available resources provided for HARQ process in special subframe then can occur not mate relative to conventional subframe; If the first biography moment of HARQ process occurs in special subframe, and retransmission time occurs in conventional subframe, then obtain with the available resources just passing moment same allocated after, result in the waste of surplus resources in conventional subframe.Therefore, if just pass and occur in dissimilar subframe when retransmitting, then can cause the waste of system resource, the error rate such as to increase at the problem.
Summary of the invention
(1) technical problem solved
The technical problem that the present invention solves is: how to provide a kind of downlink data transmission method and device, make when downlink data transmission, just passes and retransmit to occur in the subframe of identical type.
(2) technical scheme
For solving the problems of the technologies described above, embodiments provide a kind of downlink data transmission method, described method comprises:
The type that the subframe that each just passes occurs record is conventional subframe or special subframe;
Judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, if be special subframe, then to just pass occur in special subframe treat that re-transmission HARQ process is dispatched.
Preferably,
Passed originally occur in conventional subframe when the number retransmitting HARQ process is greater than 1, described to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, and specifically comprises:
To just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed;
Passed originally occur in special subframe when the number retransmitting HARQ process is greater than 1, described to just pass occur in special subframe wait that retransmitting HARQ process dispatches, and specifically comprises:
To just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed.
Preferably,
After judging that the descending sub frame of current scheduling is conventional subframe, the method comprises further:
Just pass if current occur in conventional subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
Preferably,
After judging that the descending sub frame of current scheduling is special subframe, the method comprises further:
Just pass if current occur in special subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
Preferably, the type that the subframe that each just passes occurs described record comprises before being conventional subframe or special subframe further:
When just passing, subscriber equipment being authorized, utilizing the subscriber equipment after authorizing to carry out up acknowledgement/non-acknowledgement feedback to base station.
For solving the problems of the technologies described above, the embodiment of the present invention additionally provides a kind of downlink data dispensing device, and described device comprises:
Logging modle is conventional subframe or special subframe for recording the type that the subframe that each just passes occurs;
Judge module, the descending sub frame for current scheduling is conventional subframe or special subframe;
Scheduler module, for when the judged result of judge module is conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches; When the judged result of judge module is special subframe, then to just pass occur in special subframe wait that retransmitting HARQ process dispatches.
Preferably, described device also comprises:
Scheduler module, also for passed originally occur in conventional subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed; And passed originally occur in special subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed.
Preferably, described device also comprises:
Scheduler module, if also for current just pass occur in conventional subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
Preferably, described device also comprises:
Scheduler module, if also for current just pass occur in special subframe in time retransmitting HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
Preferably, described device also comprises:
Authorization module, for authorizing subscriber equipment when just passing;
Feedback responder module, carries out up acknowledgement/non-acknowledgement feedback for utilizing the subscriber equipment after mandate to base station.
(3) beneficial effect
The present invention is by providing a kind of downlink data transmission method and device, and the type that the subframe that each just passes is occurred by record is conventional subframe or special subframe; Judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, if be special subframe, then to just pass occur in special subframe treat that re-transmission HARQ process is dispatched.Therefore ensure that just to pass and retransmit and occur in the subframe of identical type, thus avoid the wasting of resources, and reduce error rate of system.
Accompanying drawing explanation
Pass and retransmission processes schematic diagram at the beginning of when Fig. 1 is subframe proportioning 1 in prior art;
Fig. 2 is the method flow diagram that the embodiment of the present invention provides;
Fig. 3 is the method detail flowchart that the embodiment of the present invention provides;
Fig. 4 be the embodiment of the present invention provide subframe proportioning 1 time first biography and retransmission processes figure schematic diagram;
Fig. 5 is the apparatus structure schematic diagram that the embodiment of the present invention provides.
Embodiment
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Embodiment 1:
For solving the problem, embodiments provide a kind of downlink data transmission method, as shown in Figure 2, the method comprises:
S1: the type that the subframe that each just passes occurs record is conventional subframe or special subframe;
S2: judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, jump procedure S3; If be special subframe, then jump procedure S4;
S3: to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches;
S4: to just pass occur in special subframe wait that retransmitting HARQ process dispatches.
The type that the embodiment of the present invention, by record, the subframe that each just passes occurs is conventional subframe or special subframe; Judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, if be special subframe, then to just pass occur in special subframe treat that re-transmission HARQ process is dispatched.Therefore ensure that just to pass and retransmit and occur in the subframe of identical type, thus avoid the wasting of resources, and improve error rate of system.
Passed originally occur in conventional subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed; Passed originally occur in special subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed.Thus ensure that the priority waiting to retransmit time scheduling in HARQ process meeting conventional subframe/special subframe condition.
After judging that the descending sub frame of current scheduling is conventional subframe, just pass if current occur in conventional subframe wait retransmit HARQ process, then utilization idle HARQ process carries out the scheduling of new data or does not carry out any scheduling.Thus ensure that just pass be sent in conventional subframe wait that retransmitting HARQ process can all retransmit at conventional subframe, reduces the error rate.
After judging that the descending sub frame of current scheduling is special subframe, just pass if current occur in special subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.Thus ensure that just pass occur in special subframe wait that retransmitting HARQ process can all retransmit at special subframe, has saved system resource.
When just passing, subscriber equipment being authorized, utilizing the subscriber equipment after authorizing to carry out up acknowledgement/non-acknowledgement feedback to base station.By authorizing subscriber equipment, ensure that subscriber equipment retransmits, and by up acknowledgement/non-acknowledgement, ensure that the accuracy of transmission.
For solving the problems of the technologies described above, the embodiment of the present invention additionally provides a kind of detailed process of downlink data transmission method, as shown in Figure 3, comprising:
Step 101: base station sends downlink data to subscriber equipment, carry out just passing to described downlink data, described downlink data carries PDCCH and authorizes, and in first biography process, the type of the subframe that each just passes occurs record is conventional subframe or special subframe;
Wherein, carrying out just in biography process, base station is authorized subscriber equipment, and PDCCH authorizes the size that comprises data retransmission and original position etc.
In embodiments of the present invention, as shown in Figure 4, be 1 for example according to upstream and downstream proportioning, in first biography process, the type that the subframe that each just passes occurs record is conventional subframe or special subframe, and records the HARQ process of its corresponding transmission.Record result is drawn: descending conventional subframe 0 transmitting HARQ process 0 according to Fig. 4, special subframe 1 transmitting HARQ process 1, descending conventional subframe 4 transmitting HARQ process 2, descending conventional subframe 5 transmitting HARQ process 3, special subframe 6 transmitting HARQ process 4, descending conventional subframe 9 transmitting HARQ process 5.By carrying out record to first biography process, thus make follow-up scheduling process more convenient.
Step 102: subscriber equipment receives downlink data and the PDCCH mandate of base station transmission, and to base station feedback ACK/NACK;
Subscriber equipment is decoded to downlink data after receiving downlink data, if successfully decoded, show that the downlink data received is correct, then to base station feedback ACK, after returning ACK to base station, base station can continue to carry out downlink data transmission to other subscriber equipmenies; If unsuccessful decoding, show that the downlink data received is mistake, then to base station feedback NACK, downlink data, according to the NACK fed back to, is sent to this subscriber equipment by base station again.Ensure that the correctness of subscriber equipment downlink data receiving.
Step 103: judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, then jump procedure 104; If be special subframe, then jump procedure 108;
Step 104: judge just to pass occur in conventional subframe wait whether the number retransmitting HARQ process is greater than 1, if judged result is for certainly, then jump procedure 105; If judged result is negative, then jump procedure 106, if just passing the number treating re-transmission HARQ process occurring in conventional subframe is 0, then jump procedure 107;
Wherein, just pass occur in conventional subframe wait the number retransmitting HARQ process be multiple or one time, different to its scheduling mode.
Step 105: to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed;
The embodiment of the present invention by according to the sequencing just passed to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, and ensure that in data transmission procedure, the priority of procedural sequences.
Step 106: directly to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches;
Step 107: utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling;
Wherein, each user has several HARQ processes at down direction, and removing is using the HARQ process waiting for acknowledge feedback, may remain idle HARQ process.This idle HARQ process is utilized to carry out the scheduling of new data.If do not have new data to need to dispatch, then do not carry out any scheduling.
Step 108: judge just to pass the moment be special subframe wait whether the number retransmitting HARQ process is greater than 1, if judged result is for certainly, then jump procedure 109; If judged result is negative, then jump procedure 110; If just the biography moment is the number treating re-transmission HARQ process of special subframe is 0, then jump procedure 111.
Step 109: to just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed;
Step 110: directly to just pass occur in special subframe wait that retransmitting HARQ process dispatches;
Step 111: utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
In embodiments of the present invention, as shown in Figure 4, can draw in retransmission processes, it is conventional subframe or special subframe that each type of subframe retransmitted occurs, and its corresponding transmission wait retransmit HARQ process.Wherein, special subframe 1 retransmits HARQ process 1, and descending conventional subframe 4 retransmits HARQ process 0, descending conventional subframe 5 retransmits HARQ process 2, special subframe 6 retransmits HARQ process 4, and descending conventional subframe 9 retransmits HARQ process 3, and descending conventional subframe 0 retransmits HARQ process 5.Can draw thus, in first biography process, HARQ process matching convention subframe, in retransmission processes or matching convention subframe; In first biography process, the corresponding special subframe of HARQ process, in retransmission processes or corresponding special subframe.
The present invention is by providing a kind of downlink data transmission method, and the type that the subframe that each just passes is occurred by record is conventional subframe or special subframe; Judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, if be special subframe, then to just pass occur in special subframe treat that re-transmission HARQ process is dispatched.Therefore ensure that just to pass and retransmit and occur in the subframe of identical type, thus avoid the wasting of resources, and reduce error rate of system.
Embodiment 2:
For solving the problems of the technologies described above, the embodiment of the present invention additionally provides a kind of downlink data dispensing device, and as shown in Figure 5, described device comprises:
Logging modle 201 is conventional subframe or special subframe for recording the type that the subframe that each just passes occurs;
Judge module 202, the descending sub frame for current scheduling is conventional subframe or special subframe;
Scheduler module 203, for when the judged result of judge module is conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches; When the judged result of judge module is special subframe, then to just pass occur in special subframe wait that retransmitting HARQ process dispatches.
Described device also comprises:
Scheduler module, also for passed originally occur in conventional subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed; And passed originally occur in special subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed.
Described device also comprises:
Scheduler module, if also for current just pass occur in conventional subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
Scheduler module, if also for current just pass occur in special subframe in time retransmitting HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
Described device also comprises:
Authorization module, for authorizing subscriber equipment when just passing;
Feedback responder module, carries out up acknowledgement/non-acknowledgement feedback for utilizing the subscriber equipment after mandate to base station.
The embodiment of the present invention is by providing a kind of downlink data dispensing device, and the type that the subframe that each just passes is occurred by logging modle record is conventional subframe or special subframe; Judge that the descending sub frame of current scheduling is conventional subframe or special subframe by judge module, if be conventional subframe, then utilize scheduler module to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, if be special subframe, then utilize scheduler module to just pass occur in special subframe wait that retransmitting HARQ process dispatches.Therefore ensure that just to pass and retransmit and occur in the subframe of identical type, thus avoid the wasting of resources, and reduce error rate of system.
Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. a downlink data transmission method, is characterized in that, described method comprises:
The type that the subframe that each just passes occurs record is conventional subframe or special subframe;
Judge that the descending sub frame of current scheduling is conventional subframe or special subframe, if be conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, if be special subframe, then to just pass occur in special subframe treat that re-transmission HARQ process is dispatched.
2. method according to claim 1, is characterized in that,
Passed originally occur in conventional subframe when the number retransmitting HARQ process is greater than 1, described to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches, and specifically comprises:
To just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed;
Passed originally occur in special subframe when the number retransmitting HARQ process is greater than 1, described to just pass occur in special subframe wait that retransmitting HARQ process dispatches, and specifically comprises:
To just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed.
3. method according to claim 1, is characterized in that,
After judging that the descending sub frame of current scheduling is conventional subframe, the method comprises further:
Just pass if current occur in conventional subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
4. method according to claim 1, is characterized in that,
After judging that the descending sub frame of current scheduling is special subframe, the method comprises further:
Just pass if current occur in special subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
5. according to described method arbitrary in Claims 1-4, it is characterized in that, the type that the subframe that each just passes occurs described record comprises before being conventional subframe or special subframe further:
When just passing, subscriber equipment being authorized, utilizing the subscriber equipment after authorizing to carry out up acknowledgement/non-acknowledgement feedback to base station.
6. a downlink data dispensing device, is characterized in that, described device comprises:
Logging modle is conventional subframe or special subframe for recording the type that the subframe that each just passes occurs;
Judge module, the descending sub frame for current scheduling is conventional subframe or special subframe;
Scheduler module, for when the judged result of judge module is conventional subframe, then to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches; When the judged result of judge module is special subframe, then to just pass occur in special subframe wait that retransmitting HARQ process dispatches.
7. device according to claim 6, is characterized in that, described device also comprises:
Scheduler module, also for passed originally occur in conventional subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in conventional subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed; And passed originally occur in special subframe when the number retransmitting HARQ process is greater than 1, to just pass occur in special subframe wait that retransmitting HARQ process dispatches according to the sequencing just passed.
8. device according to claim 6, is characterized in that, described device also comprises:
Scheduler module, if also for current just pass occur in conventional subframe wait retransmit HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
9. device according to claim 6, is characterized in that, described device also comprises:
Scheduler module, if also for current just pass occur in special subframe in time retransmitting HARQ process, then utilize idle HARQ process carry out the scheduling of new data or do not carry out any scheduling.
10. the device according to any one of claim 6 to 9, is characterized in that, described device also comprises:
Authorization module, for authorizing subscriber equipment when just passing;
Feedback responder module, carries out up acknowledgement/non-acknowledgement feedback for utilizing the subscriber equipment after mandate to base station.
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| CN201310351329.8A CN104378182A (en) | 2013-08-13 | 2013-08-13 | Method and device for sending downlink data |
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| CN201310351329.8A CN104378182A (en) | 2013-08-13 | 2013-08-13 | Method and device for sending downlink data |
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| CN106941392A (en) * | 2016-01-04 | 2017-07-11 | 中国移动通信集团公司 | A kind of method and apparatus retransmitted |
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| CN102158981A (en) * | 2010-02-11 | 2011-08-17 | 中兴通讯股份有限公司 | Contention-based uplink data transmission method and system |
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| CN107211394A (en) * | 2015-04-07 | 2017-09-26 | 华为技术有限公司 | The network equipment, user equipment and downlink data transmission method |
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