CN101730245A - Method, system and device for activating SPS under condition of losing PDSSH - Google Patents
Method, system and device for activating SPS under condition of losing PDSSH Download PDFInfo
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Abstract
The invention provides a method, a system and a device for activating SPS under the condition of losing PDSSH. User equipment (UE) receives a continuous scheduling retransmission command transmitted by an evolution base station (eNB) through the PDSSH, activates corresponding SPS service by the continuous scheduling retransmission command and calculates the starting time of the SPS service according to the transmitting time of the continuous scheduling retransmission command. In the invention, the UE can activate the continuous schedule according to the received retransmission scheduling command to rapidly realize continuous scheduling activation under the condition of losing the PDSSH, thereby solving the problem of mistaken continuous scheduling process caused by losing the PDSSH and preventing data transmission error and interference caused by losing a control command activating the continuous schedule.
Description
Technical field
The present invention relates to communication technical field, be particularly related to a kind of PDCCH (Physical DownlinkControl Channel, Physical Downlink Control Channel) method, system and device that SPS (Semi-PersistentScheduling, semi-continuous scheduling) activates under the loss situation.
Background technology
Introduced SPS mechanism in LTE (Long Term Evolution, the Long Term Evolution) system.Semi-continuous scheduling can be at specific transactions, use as VoIP (internet protocol voice technology) is professional, its working method is: adopt the mode of continuous dispatching during to the initial transmission of particular data packet (as the voice packets of VoIP business), the mode that adopts dynamic dispatching to combine with continuous dispatching during re-transmission.The difference of continuous dispatching and dynamic dispatching is whether need to use the control command indication, control command is then carried by PDCCH.
Below just dynamic dispatching and two kinds of scheduling modes of continuous dispatching are simply introduced:
1, dynamic dispatching is meant eNB (Evolved Node B, evolution base station) must first these data of transmitting control commands indication UE (subscriber equipment) will with which kind of transformat send on which resource before sending data, UE receives (descending) packet or transmission (up) packet according to control command.Wherein, be illustrated in figure 1 as the essential information that comprises in the control command, because up employing synchronous HARQ (Hybrid Automatic Repeat Request mixes automatically retransmitting), so do not comprise the HARQ process number in the dispatching command.Except these explicit informations, control command also includes the distinctive sign of UE C-RNTI (Radio Network Temporary Identity, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI), this control command is carried out scrambling so that distinguish the control command of giving different user.
2, continuous dispatching is meant that eNB gives certain professional allocation of packets fixed resource (time, frequency, code channel) and specifies fixing transformat, and packet sends with the regulation transformat in the allocated resource position, need not dispatch.In the LTE system, eNB is by RRC (Radio Resource Control, Radio Resource control) the appearance cycle of signaling indication persistent resources, specify the frequency location of continuous dispatching and transformat etc. by special control command at first in continuous dispatching, follow-up continuous dispatching packet is according to the cycle of this starting point and the indication of RRC signaling, form by this control command appointment receives (descending) packet or transmission (up) packet, no longer needs the control command indication.This special control command has two effects: 1) activate continuous dispatching, specify continuous dispatching starting point and form; 2) dispatch first packet, being equivalent to first packet is dynamic dispatching.
In the LTE system, in order to distinguish continuous dispatching control command and dynamic dispatching control command, these two kinds of control commands are distinguished, mainly show 2 points:
1) dynamic dispatching control command is carried out addressing with C-RNTI; And the continuous dispatching control command is carried out addressing with SPSC-RNTI.
2) the NDI territory of dynamic dispatching is used to distinguish different packets, everyly reaches a new data packets, and NDI carries out once inside out; And the NDI territory of continuous dispatching control command is used to distinguish initial transmission and re-transmission, NDI=0 represents initial transmission scheduling (being equivalent to the continuous dispatching activation command), NDI=1 represents retransfer scheduling, the re-transmission of all continuous dispatching packets all is that the control command of NDI=1 is dispatched by band SPS C-RNTI.
The shortcoming that prior art exists is, existing above-mentioned mechanism does not have any problem when normal data transfer, if but the continuous dispatching activation command is lost, then can bring packet to lose problem wrong and that disturb continuously, and the problem that can bring a large amount of wastings of resources, data transfer delay and data to disturb.
Be that example is analyzed the shortcoming of above-mentioned prior art with downlink transfer and uplink respectively below.
As shown in Figure 2, lose the schematic diagram of the problem of bringing by the continuous dispatching activation command for the prior art downlink transfer.Lose if eNB dispatches the PDCCH of first VoIP bag, UE also can't the downlink data receiving bag when can not receive control command.This moment, eNB received that not UE confirms to reply under the situation of ACK feedback, with the re-transmission of first packet of scheduling.If UE receives correct, then feeding back ACK.At this moment, because eNB can't judge that UE is that initial transmission or the initial transmission control command that is not correctly decoded out first packet lost, therefore after first data packet transmission success, can think the persistent scheduling resource configuration successful, to adopt continuous dispatching follow-up, promptly initial transmission is not sent out control command.Yet UE can't judge the initial moment of continuous dispatching because the initial transmission PDCCH of first packet loses, and can only think that continuous dispatching does not also activate.For follow-up data bag 2,3, eNB sends initial transmission on persistent scheduling resource, does not send out control command; And UE does not receive downlink transfer in the persistent scheduling resource position, so eNB have to dispatch re-transmission.Like this,, also wasted downlink resource, strengthened data transmission delay because eNB and UE, not only do not reach the purpose that continuous dispatching is saved control command to the understanding disunity of continuous dispatching state of activation.This mistake also can continue the long period, finishes until a VoIP active period.
As shown in Figure 3, lose the problem schematic diagram that brings by the continuous dispatching activation command for the prior art uplink.Lose if eNB dispatches the PDCCH of first VoIP bag, UE can not receive control command, does not send out the upstream data bag.ENB does not receive the upstream data bag, and then eNB will dispatch the re-transmission of first packet.UE sends the uplink retransmission packet according to retransmitting order, and is correct if eNB receives, then feeding back ACK.At this moment, eNB thinks the persistent scheduling resource configuration successful after the success of first data packet transmission, follow-uply will adopt continuous dispatching, and promptly initial transmission is not sent out control command.Yet UE can not judge the initial moment of continuous dispatching because the initial transmission PDCCH of first packet loses, and can only think that continuous dispatching does not also activate.Follow-up data bag 2,3, eNB receives initial transmission on persistent scheduling resource, do not send out control command; UE can not send uplink in the persistent scheduling resource position.ENB have to dispatch re-transmission.Like this, the same with descending scheduling described above, because eNB and UE, not only do not reach the purpose that continuous dispatching is saved control command to the understanding disunity of continuous dispatching state of activation, also wasted ascending resource, strengthened data transmission delay.This wrong meeting continuity long period, finish until a VoIP active period.
More serious situation is that the PDCCH of the reprovision persistent scheduling resource that sends during continuous dispatching is carried out of eNB loses.If this PDCCH loses, concerning up, UE also can continue to use the persistent scheduling resource of original configuration to send uplink, and this ascending resource may have been distributed to other users, therefore also can cause uplink interference, make other users all can't carry out normal data transfer.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solve in the prior art to lose, and the packet that brings lost mistake and interference continuously owing to PDCCH, and the problem of the wasting of resources.
For achieving the above object, one aspect of the present invention proposes the method that semi-continuous scheduling SPS activates under a kind of physical downlink control channel PDCCH loss situation, may further comprise the steps: user equipment (UE) receives evolution base station eNB and retransmits order by the continuous dispatching that PDCCH sends; Described UE retransmits order according to described continuous dispatching and activates corresponding SPS business, and retransmits the zero-time that the transmitting time of ordering is calculated described SPS business according to described continuous dispatching.
As one embodiment of the present of invention, for downlink continuous scheduling activates for the first time, also comprised before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission: described eNB sends the continuous dispatching activation command by described PDCCH to described UE, dispatches first downlink data packet of continuous dispatching simultaneously to described UE; Described eNB judges whether described UE correctly receives first downlink data packet of described continuous dispatching; If described eNB judges described UE and does not correctly receive first downlink data packet of described continuous dispatching, then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, and first downlink data packet with described continuous dispatching retransmits to described UE simultaneously.
As one embodiment of the present of invention, described eNB judges that first downlink data packet whether described UE correctly receives described continuous dispatching comprises: described eNB judges whether to receive the ACK or the NACK of described UE feedback; If described eNB does not receive the ACK of described UE feedback, or described eNB receives the NACK of described UE feedback, judges that then described UE does not correctly receive first downlink data packet of described continuous dispatching.
As one embodiment of the present of invention, the zero-time that the described transmitting time that retransmits order according to described continuous dispatching is calculated described SPS business comprises: the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
As one embodiment of the present of invention, be the downlink continuous scheduling reprovision, before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprise: when described eNB decision is carried out persistent scheduling resource when reshuffling to described UE, described eNB sends the continuous dispatching reconfigure command to described UE, and first downlink data packet scheduling that will reshuffle is simultaneously given described UE; Described eNB judges whether described UE correctly receives described first downlink data packet of reshuffling; If described eNB judges described UE and does not correctly receive described first downlink data packet of reshuffling that then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, simultaneously described first downlink data packet of reshuffling is retransmitted to described UE.
As one embodiment of the present of invention, described eNB judges whether described UE correctly receives described first downlink data packet of reshuffling and comprise: described eNB judges whether to receive the ACK or the NACK of described UE feedback; If described eNB does not receive the ACK of described UE feedback, or described eNB receives the NACK of described UE feedback, judges that then described UE does not correctly receive described first downlink data packet of reshuffling.
As one embodiment of the present of invention, after described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprise: described UE judges whether described continuous dispatching re-transmission order is unusual; If described UE judges described continuous dispatching and retransmits order unusually, then described UE abandons original continuous dispatching configuration, and retransmit order according to described continuous dispatching and activate corresponding SPS business again, and calculate the zero-time of described SPS business according to the transmitting time that described continuous dispatching retransmits order.
As one embodiment of the present of invention, described UE judges that described continuous dispatching retransmits order and whether comprises unusually: described UE judges whether described continuous dispatching retransmits in the order transmission block size TBS obviously different with the TBS of continuous dispatching configuration before, if both obvious differences then to judge that described continuous dispatching retransmits order unusual.
As one embodiment of the present of invention, the zero-time that the described transmitting time that retransmits order according to described continuous dispatching is calculated described SPS business comprises: the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
As one embodiment of the present of invention,, before receiving the continuous dispatching re-transmission order of eNB by the PDCCH transmission, described UE also comprises for up continuous dispatching activates for the first time:
Described eNB sends the continuous dispatching activation command by described PDCCH to described UE, dispatches first upstream data bag that described UE sends continuous dispatching; If described eNB does not receive first upstream data bag of described continuous dispatching, then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, dispatches described UE first upstream data bag of described continuous dispatching is retransmitted to described eNB.
As one embodiment of the present of invention, the zero-time that the described transmitting time that retransmits order according to continuous dispatching is calculated the SPS business comprises: the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
As one embodiment of the present of invention, be up continuous dispatching reprovision, before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprise: when described eNB decision is carried out persistent scheduling resource when reshuffling to described UE, described eNB sends the continuous dispatching reconfigure command to described UE, dispatches described UE and sends first upstream data bag of reshuffling; If described eNB does not receive first upstream data bag of reshuffling that described UE sends, then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, dispatches described UE described first upstream data bag of reshuffling is retransmitted to described eNB.
As one embodiment of the present of invention, after described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprise: described UE judges whether described continuous dispatching re-transmission order is unusual; If described UE judges described continuous dispatching and retransmits order unusually, then described UE abandons original continuous dispatching configuration, and retransmit order according to described continuous dispatching and activate corresponding SPS business again, and calculate the zero-time of described SPS business according to the transmitting time that described continuous dispatching retransmits order
As one embodiment of the present of invention, described UE judges that described continuous dispatching retransmits order and whether comprises unusually: described UE judges whether described continuous dispatching retransmits in the order TBS obviously different with the TBS of continuous dispatching configuration before, if both obvious differences then to judge that described continuous dispatching retransmits order unusual.
As one embodiment of the present of invention, described UE judges that described continuous dispatching retransmits order and whether comprises unusually: if the time location that described UE judgement continuous dispatching retransfer scheduling order indication retransmits is run counter to the principle of synchronous hybrid automatic repeat HARQ, judge that then described continuous dispatching retransmits order unusually.
As one embodiment of the present of invention, the zero-time that the described transmitting time that retransmits order according to described continuous dispatching is calculated described SPS business comprises: the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
The present invention also proposes SPS activated system under a kind of PDCCH loss situation on the other hand, comprises at least one UE of eNB and described eNB service, and described eNB is used for sending continuous dispatching to described UE by PDCCH and retransmits order; Described UE, be used to receive described eNB and retransmit order by the continuous dispatching that PDCCH sends, and according to the corresponding SPS business of described continuous dispatching re-transmission order activation, and the zero-time of calculating described SPS business according to the transmitting time of described continuous dispatching re-transmission order.
The present invention also proposes a kind of UE on the other hand, comprises receiver module, active module and zero-time computing module, and described receiver module is used to receive eNB and retransmits order by the continuous dispatching that PDCCH sends; Described active module, the continuous dispatching that is used for receiving according to described receiver module retransmits order and activates corresponding SPS business; Described zero-time computing module is used for retransmitting the zero-time that the transmitting time of ordering is calculated described SPS business according to described continuous dispatching.
As one embodiment of the present of invention, for downlink transfer, the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
As one embodiment of the present of invention, for uplink, the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
UE can activate continuous dispatching according to the retransfer scheduling order that receives among the present invention, make UE can realize apace under the situation that PDCCH loses that continuous dispatching activates, thereby solve the problem that PDCCH loses the continuous dispatching process error situation that causes, can prevent to lose data transmission fault and the interference that brings because of the control command that activates continuous dispatching.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
The essential information schematic diagram of Fig. 1 for comprising in the control command;
Fig. 2 is lost the schematic diagram of the problem of bringing for the prior art downlink transfer by the continuous dispatching activation command;
Fig. 3 is lost the problem schematic diagram that brings for the prior art uplink by the continuous dispatching activation command;
Fig. 4 is the method flow diagram that SPS activates under the PDCCH loss situation of the embodiment of the invention one;
Fig. 5 is the method flow diagram that SPS activates under the PDCCH loss situation of the embodiment of the invention two;
Fig. 6 is the method flow diagram that SPS activates under the PDCCH loss situation of the embodiment of the invention three;
Fig. 7 is the method flow diagram that SPS activates under the PDCCH loss situation of the embodiment of the invention four;
Fig. 8 is the structure chart of SPS activated system under the PDCCH loss situation of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention mainly was before UE continuous dispatching activation of service, retransmitted order if UE receives eNB by the continuous dispatching that PDCCH sends, and then UE will retransmit order according to this continuous dispatching and activate corresponding SPS business.Perhaps, though existed among the UE under the situation of persistent scheduling resource configuration, but UE has received the obvious unusual continuous dispatching that eNB sends and has retransmitted order that then UE will retransmit order according to this continuous dispatching and abandon original continuous dispatching configuration, and activate corresponding SPS business again.And owing to be to retransmit order according to continuous dispatching to activate corresponding SPS business in the present invention, therefore the zero-time of SPS business can not be determined with the transmitting time of continuous dispatching re-transmission order, need revise it, for uplink of the present invention and downlink transfer, also there is difference in the mode of its revision, will describe zero-time how to calculate the SPS business in detail in following embodiment.
Below will in conjunction with above-mentioned thought of the present invention the present invention be described in detail in the mode of specific embodiment; need to prove that these embodiment only are in order to have clearer to above-mentioned thought of the present invention; more complete understanding; be not to concrete qualification of the present invention; that is to say not to be that the present invention only can realize by following embodiment; it should be understood that those skilled in the art can above-mentioned thought according to the present invention make variation to following embodiment of the present invention; to realize identical purpose; reach same technique effect, therefore similarly change or revise also should be included within protection scope of the present invention.
Embodiment one,
This embodiment is that example is described with first activation of downlink continuous scheduling, as shown in Figure 4, method flow diagram for SPS activation under the PDCCH loss situation of the embodiment of the invention one, in this embodiment, UE is in initial transmission phase, the continuous dispatching business is not activated, and UE retransmits the order back in the continuous dispatching of receiving eNB and activates corresponding SPS business, and calculates the zero-time of described SPS business according to the transmitting time of continuous dispatching re-transmission order.May further comprise the steps:
Step S401, eNB sends the continuous dispatching activation command by PDCCH to UE, dispatches first downlink data packet of continuous dispatching simultaneously to UE.Wherein, be 0 in the control command, its expression initial transmission scheduling.
Step S402, eNB judge whether UE correctly receives first downlink data packet of continuous dispatching.Particularly, can judge whether to receive the ACK or the NACK of UE feedback as eNB; If eNB does not receive the ACK of UE feedback, or eNB receives the NACK of UE feedback, judges that then UE does not correctly receive first downlink data packet of described continuous dispatching.
Step S403 does not correctly receive first downlink data packet of continuous dispatching if eNB judges UE, and then eNB sends continuous dispatching by PDCCH to UE and retransmits order, and first downlink data packet with continuous dispatching retransmits to UE simultaneously.
Step S404, UE receive first downlink data packet that the continuous dispatching re-transmission is ordered and eNB retransmits that eNB sends.
Step S405, this moment is owing to UE un-activation continuous dispatching still, therefore before the continuous dispatching activation of service, if UE receives that the control command of scheduling continuous dispatching packet re-transmission is (as band SPSC-RNTI, the PDCCH dispatching downlink transmission of NDI=1), then UE activates continuous dispatching.If the lasting business datum of correct this PDCCH scheduling of UE decoding, then UE is to the eNB feeding back ACK.If UE is the lasting business datum of correct this PDCCH scheduling of decoding not, then UE upwards feeds back NACK, at this moment SPS C-RNTI continue to be used by PDCCH in the base station, and the PDCCH dispatching downlink transmission of NDI=1 is correct or reach maximum transmission times up to the downlink data decoding.In the present invention, as long as first downlink data packet of continuous dispatching transmission is correct, think then that SPS activates to finish that if first downlink data packet bust this of continuous dispatching, then eNB need initiate the activation of SPS in second packet of scheduling.
As one embodiment of the present of invention, because the asynchronous HARQ of descending employing, the time interval between twice transmission is unfixed, therefore this determines to have brought problem with regard to what give semi-continuous scheduling zero hour, be decided to be the continuous dispatching zero-time if continuous dispatching is retransmitted the delivery time of order, this is inaccurate, therefore also needs in this embodiment the continuous dispatching zero-time is adjusted, and the continuous dispatching zero-time is set at retransfer scheduling PDCCH delivery time and deducts descending minimum RTT.
Embodiment two,
This embodiment is that example is described with the downlink continuous scheduling reprovision, as shown in Figure 5, method flow diagram for SPS activation under the PDCCH loss situation of the embodiment of the invention two, in this embodiment, the continuous dispatching business of UE is activated, in UE, had the persistent scheduling resource configuration, and at this moment owing to reasons such as resource allocation are unreasonable, eNB need reconfigure to the continuous dispatching of UE.But because UE does not receive the continuous dispatching reprovision order that eNB sends because PDCCH loses, therefore after UE receives the order of continuous dispatching retransfer scheduling, if think that it is obviously unusual that this continuous dispatching retransmits order, at this moment UE just thinks that the order of continuous dispatching reprovision loses, this moment, UE abandoned original continuous dispatching configuration, and retransmit order according to continuous scheduling and activate corresponding SPS business, and calculate the zero-time of described SPS business according to the transmitting time that described continuous dispatching retransmits order.This embodiment may further comprise the steps:
Step S501 carries out persistent scheduling resource when reshuffling when eNB decision to UE, and eNB sends the continuous dispatching reconfigure command to UE, and first downlink data packet scheduling that will reshuffle is simultaneously given UE.
Step S502, eNB judge whether UE correctly receives first downlink data packet of reshuffling.Particularly, eNB judges whether to receive the ACK or the NACK of UE feedback; If eNB does not receive the ACK of UE feedback, or eNB receives the NACK of UE feedback, judges that then UE does not correctly receive described first downlink data packet of reshuffling.
Step S503 does not correctly receive first downlink data packet of reshuffling if eNB judges UE, and then described eNB sends continuous dispatching by PDCCH to UE and retransmits order, and first downlink data packet that will reshuffle simultaneously retransmits to UE.
Step S504, UE receive eNB and retransmit order by the continuous dispatching that PDCCH sends.
Step S505, UE judge whether this continuous dispatching re-transmission order that receives is unusual.If UE judges continuous dispatching re-transmission order unusually, then UE abandons original continuous dispatching configuration, and retransmits the corresponding SPS business that activates again of ordering according to continuous dispatching, and retransmits the zero-time that the transmitting time of ordering is calculated the SPS business according to continuous dispatching.Owing to the reason that produces the continuous dispatching reprovision generally is because resource allocation is unreasonable, so the reprovision resource generally can be assigned than big difference with original persistent scheduling resource.Therefore, the present invention has proposed a kind ofly to judge that whether unusual continuous dispatching retransmit order mode according to above-mentioned principle, particularly, can judge that continuous dispatching retransmits TBS (TransportBlock Size in the order by UE, the transmission block size) whether obviously differently judges, if both obvious differences then to judge that this continuous dispatching retransmits order unusual with the TBS of continuous dispatching configuration before.Equally in this embodiment, UE also needs the zero-time of SPS business is adjusted, and particularly, the zero-time of SPS business is that continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
Embodiment three,
This embodiment is that example is described with first activation of up continuous dispatching, as shown in Figure 6, method flow diagram for SPS activation under the PDCCH loss situation of the embodiment of the invention three, in this embodiment, UE is in initial transmission phase, the continuous dispatching business is not activated, and UE retransmits the order back in the continuous dispatching of receiving eNB and activates corresponding SPS business, and calculates the zero-time of described SPS business according to the transmitting time of continuous dispatching re-transmission order.May further comprise the steps:
Step S601, eNB sends the continuous dispatching activation command by PDCCH to UE, and scheduling UE sends first upstream data bag of continuous dispatching.Wherein, NDI is 0 in the control command, its expression initial transmission scheduling.
Step S602, if eNB does not receive first upstream data bag of continuous dispatching, then eNB sends continuous dispatching by PDCCH to UE and retransmits order (as band SPS C-RNTI, the PDCCH dispatching downlink transmission of NDI=1), and scheduling UE retransmits first upstream data bag of continuous dispatching to eNB.
Step S603, UE receive eNB and retransmit order by the continuous dispatching that PDCCH sends.
Step S604, UE retransmits order according to continuous dispatching and activates corresponding SPS business, and retransmits the zero-time that the transmitting time of ordering is calculated the SPS business according to continuous dispatching.Equally, in this embodiment, UE also needs the zero-time of SPS business is adjusted, but because up employing synchronous HARQ, the time interval between twice transmission is fixed, and need not introduce the re-transmission time restriction in the downlink transfer.Therefore the zero-time of SPS business is that retransfer scheduling PDCCH delivery time deducts up RTT in the present embodiment.
Embodiment four,
This embodiment is that example is described with up continuous dispatching reprovision, as shown in Figure 7, method flow diagram for SPS activation under the PDCCH loss situation of the embodiment of the invention four, in this embodiment, the continuous dispatching business of UE is activated, in UE, had the persistent scheduling resource configuration, and at this moment owing to reasons such as resource allocation are unreasonable, eNB need reconfigure to the continuous dispatching of UE.But because UE does not receive the continuous dispatching reprovision order that eNB sends because PDCCH loses, therefore after UE receives the order of continuous dispatching retransfer scheduling, if think that it is obviously unusual that this continuous dispatching retransmits order, at this moment UE just thinks that the order of continuous dispatching reprovision loses, this moment, UE abandoned original continuous dispatching configuration, and retransmit order according to continuous scheduling and activate corresponding SPS business, and calculate the zero-time of described SPS business according to the transmitting time that described continuous dispatching retransmits order.This embodiment may further comprise the steps:
Step S701 carries out persistent scheduling resource when reshuffling when eNB decision to UE, and eNB sends the continuous dispatching reconfigure command to UE, and scheduling UE sends first upstream data bag of reshuffling.
Step S702, if eNB does not receive first upstream data bag of reshuffling that UE sends, then eNB sends continuous dispatching by PDCCH to UE and retransmits order, first upstream data bag that scheduling UE will reshuffle retransmits to eNB.
Step S703, UE receive eNB and retransmit order by the continuous dispatching that PDCCH sends.
Step S704, UE judge whether continuous dispatching re-transmission order is unusual.
Step S705, if UE judges continuous dispatching and retransmits order unusually, then UE abandons original continuous dispatching configuration, and retransmits the corresponding SPS business that activates again of ordering according to continuous dispatching, and retransmits the zero-time that the transmitting time of ordering is calculated the SPS business according to continuous dispatching.As one embodiment of the present of invention, UE can judge in the following way whether continuous dispatching re-transmission order is unusual in this embodiment.Mode one, UE can judge whether continuous dispatching retransmits in the order TBS obviously different with the TBS of continuous dispatching configuration before, if both obvious differences then to judge that this continuous dispatching retransmits order unusual.Mode two is run counter to the principle of synchronous HARQ if UE judges the time location of continuous dispatching retransfer scheduling order indication re-transmission, and promptly retransmission time interval is not equal to fixing up RTT, judges that then this continuous dispatching re-transmission order is unusual.。Equally, in this embodiment, UE also needs the zero-time of SPS business is adjusted, but because up employing synchronous HARQ, the time interval between twice transmission is fixed, and need not introduce the re-transmission time restriction in the downlink transfer.Therefore the zero-time of SPS business is that retransfer scheduling PDCCH delivery time deducts up RTT in the present embodiment.
As shown in Figure 8, be the structure chart of SPS activated system under the PDCCH loss situation of the present invention, this system comprises at least one UE 200 of eNB 100 and eNB 100 services.ENB 100 is used for sending continuous dispatching to UE 200 by PDCCH and retransmits order.UE 200 is used to receive eNB 100 and retransmits order by the continuous dispatching that PDCCH sends, and activates corresponding SPS business according to continuous dispatching re-transmission order, and the zero-time that retransmits the transmitting time calculating SPS business of order according to continuous dispatching.Wherein, calculate the SPS business zero-time mode can because uplink or downlink transfer and different, concrete account form can be referring to foregoing description.
Wherein UE 200 comprises receiver module 210, active module 220 and zero-time computing module 230.Receiver module 210 is used to receive eNB 100 and retransmits order by the continuous dispatching that PDCCH sends.The continuous dispatching that active module 220 is used for receiving according to receiver module 210 retransmits order and activates corresponding SPS business.Zero-time computing module 230 is used for retransmitting the zero-time that the transmitting time of ordering is calculated described SPS business according to continuous dispatching.
As one embodiment of the present of invention, for downlink transfer, the zero-time of SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
As one embodiment of the present of invention, for uplink, the zero-time of SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
UE can activate continuous dispatching according to the retransfer scheduling order that receives among the present invention, make UE can realize apace under the situation that PDCCH loses that continuous dispatching activates, thereby solve the problem that PDCCH loses the continuous dispatching process error situation that causes, can prevent to lose data transmission fault and the interference that brings because of the control command that activates continuous dispatching.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (20)
1. the method that semi-continuous scheduling SPS activates under the physical downlink control channel PDCCH loss situation is characterized in that, may further comprise the steps:
User equipment (UE) receives evolution base station eNB and retransmits order by the continuous dispatching that PDCCH sends;
Described UE retransmits order according to described continuous dispatching and activates corresponding SPS business, and retransmits the zero-time that the transmitting time of ordering is calculated described SPS business according to described continuous dispatching.
2. the method that SPS activates under the PDCCH loss situation as claimed in claim 1 is characterized in that, for downlink continuous scheduling activates for the first time, also comprises before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission:
Described eNB sends the continuous dispatching activation command by described PDCCH to described UE, dispatches first downlink data packet of continuous dispatching simultaneously to described UE;
Described eNB judges whether described UE correctly receives first downlink data packet of described continuous dispatching;
If described eNB judges described UE and does not correctly receive first downlink data packet of described continuous dispatching, then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, and first downlink data packet with described continuous dispatching retransmits to described UE simultaneously.
3. the method that SPS activates under the PDCCH loss situation as claimed in claim 2 is characterized in that, described eNB judge described UE whether correctly first downlink data packet of the described continuous dispatching of reception comprise:
Described eNB judges whether to receive the ACK or the NACK of described UE feedback;
If described eNB does not receive the affirmation of described UE feedback and replys ACK, or described eNB receive described UE feedback deny replying NACK, judge that then described UE does not correctly receive first downlink data packet of described continuous dispatching.
4. the method that activates as SPS under claim 2 or the 3 described PDCCH loss situation is characterized in that, the zero-time that described transmitting time according to described continuous dispatching re-transmission order is calculated described SPS business comprises:
The zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
5. the method that SPS activates under the PDCCH loss situation as claimed in claim 1 is characterized in that, is the downlink continuous scheduling reprovision, before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprises:
When described eNB decision described UE is carried out persistent scheduling resource when reshuffling, described eNB sends the continuous dispatching reconfigure command to described UE, and first downlink data packet scheduling that will reshuffle is simultaneously given described UE;
Described eNB judges whether described UE correctly receives described first downlink data packet of reshuffling;
If described eNB judges described UE and does not correctly receive described first downlink data packet of reshuffling that then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, simultaneously described first downlink data packet of reshuffling is retransmitted to described UE.
6. the method that SPS activates under the PDCCH loss situation as claimed in claim 5 is characterized in that, described eNB judges whether described UE correctly receives described first downlink data packet of reshuffling and comprise:
Described eNB judges whether to receive the ACK or the NACK of described UE feedback;
If described eNB does not receive the ACK of described UE feedback, or described eNB receives the NACK of described UE feedback, judges that then described UE does not correctly receive described first downlink data packet of reshuffling.
7. the method that SPS activates under the PDCCH loss situation as claimed in claim 5 is characterized in that, after described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprises:
Described UE judges whether described continuous dispatching re-transmission order is unusual;
If described UE judges described continuous dispatching and retransmits order unusually, then described UE abandons original continuous dispatching configuration, and retransmit order according to described continuous dispatching and activate corresponding SPS business again, and calculate the zero-time of described SPS business according to the transmitting time that described continuous dispatching retransmits order.
8. the method that SPS activates under the PDCCH loss situation as claimed in claim 7 is characterized in that, described UE judges that described continuous dispatching retransmits order and whether comprises unusually:
Described UE judges whether described continuous dispatching retransmits in the order transmission block size TBS obviously different with the TBS of continuous dispatching configuration before, if both obvious differences then to judge that described continuous dispatching retransmits order unusual.
9. the method that activates as SPS under each described PDCCH loss situation of claim 5-8 is characterized in that,
The zero-time that described transmitting time according to described continuous dispatching re-transmission order is calculated described SPS business comprises:
The zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
10. the method that SPS activates under the PDCCH loss situation as claimed in claim 1 is characterized in that, for up continuous dispatching activates for the first time, also comprises before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission:
Described eNB sends the continuous dispatching activation command by described PDCCH to described UE, dispatches first upstream data bag that described UE sends continuous dispatching;
If described eNB does not receive first upstream data bag of described continuous dispatching, then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, dispatches described UE first upstream data bag of described continuous dispatching is retransmitted to described eNB.
11. the method that SPS activates under the PDCCH loss situation as claimed in claim 10 is characterized in that, the zero-time that described transmitting time according to continuous dispatching re-transmission order is calculated the SPS business comprises:
The zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
12. the method that SPS activates under the PDCCH loss situation as claimed in claim 1 is characterized in that, is up continuous dispatching reprovision, before described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprises:
When described eNB decision described UE is carried out persistent scheduling resource when reshuffling, described eNB sends the continuous dispatching reconfigure command to described UE, dispatches described UE and sends first upstream data bag of reshuffling;
If described eNB does not receive first upstream data bag of reshuffling that described UE sends, then described eNB sends continuous dispatching by described PDCCH to described UE and retransmits order, dispatches described UE described first upstream data bag of reshuffling is retransmitted to described eNB.
13. the method that SPS activates under the PDCCH loss situation as claimed in claim 12 is characterized in that, after described UE receives the continuous dispatching re-transmission order of eNB by the PDCCH transmission, also comprises:
Described UE judges whether described continuous dispatching re-transmission order is unusual;
If described UE judges described continuous dispatching and retransmits order unusually, then described UE abandons original continuous dispatching configuration, and retransmit order according to described continuous dispatching and activate corresponding SPS business again, and calculate the zero-time of described SPS business according to the transmitting time that described continuous dispatching retransmits order.
14. the method that SPS activates under the PDCCH loss situation as claimed in claim 13 is characterized in that, described UE judges that described continuous dispatching retransmits order and whether comprises unusually:
Described UE judges whether described continuous dispatching retransmits in the order TBS obviously different with the TBS of continuous dispatching configuration before, if both obvious differences then to judge that described continuous dispatching retransmits order unusual.
15. the method that SPS activates under the PDCCH loss situation as claimed in claim 13 is characterized in that, described UE judges that described continuous dispatching retransmits order and whether comprises unusually:
If described UE judges the time location of continuous dispatching retransfer scheduling order indication re-transmission and runs counter to the principle of synchronous hybrid automatic repeat HARQ, judge that then described continuous dispatching re-transmission order is unusual.
16. the method as SPS under each described PDCCH loss situation of claim 12-15 activates is characterized in that, the zero-time that described transmitting time according to described continuous dispatching re-transmission order is calculated described SPS business comprises:
The zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
17. SPS activated system under the PDCCH loss situation is characterized in that, comprises at least one UE of eNB and described eNB service,
Described eNB is used for sending continuous dispatching to described UE by PDCCH and retransmits order;
Described UE, be used to receive described eNB and retransmit order by the continuous dispatching that PDCCH sends, and according to the corresponding SPS business of described continuous dispatching re-transmission order activation, and the zero-time of calculating described SPS business according to the transmitting time of described continuous dispatching re-transmission order.
18. a UE is characterized in that, comprises receiver module, active module and zero-time computing module,
Described receiver module is used to receive eNB and retransmits order by the continuous dispatching that PDCCH sends;
Described active module, the continuous dispatching that is used for receiving according to described receiver module retransmits order and activates corresponding SPS business;
Described zero-time computing module is used for retransmitting the zero-time that the transmitting time of ordering is calculated described SPS business according to described continuous dispatching.
19. UE as claimed in claim 18 is characterized in that, for downlink transfer, the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and descending minimum RTT.
20. UE as claimed in claim 18 is characterized in that, for uplink, the zero-time of described SPS business is that described continuous dispatching retransmits the poor of the transmitting time of order and up RTT.
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