CN101742532A - Control method for receiving downlink data by mobile communication terminal and mobile communication terminal - Google Patents

Control method for receiving downlink data by mobile communication terminal and mobile communication terminal Download PDF

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Publication number
CN101742532A
CN101742532A CN200810226581A CN200810226581A CN101742532A CN 101742532 A CN101742532 A CN 101742532A CN 200810226581 A CN200810226581 A CN 200810226581A CN 200810226581 A CN200810226581 A CN 200810226581A CN 101742532 A CN101742532 A CN 101742532A
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timer
time
length
correctly
receive
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CN101742532B (en
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谢芳
胡臻平
崔春风
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Priority to CN2008102265815A priority Critical patent/CN101742532B/en
Priority to PCT/CN2009/001260 priority patent/WO2010054535A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to mobile communication technology, in particular to technology for receiving downlink data in a discontinuous reception way by a mobile terminal, and provides a control method for receiving the downlink data and the mobile communication terminal, which are used for improving the success rate of receiving retransmission data. The control method for receiving the downlink data and the mobile communication terminal provided by the embodiment of the invention utilizes a third timer to monitor time difference between the earliest arrival time of second retransmission data and the latest arrival time of first retransmission data, to turn on a receiver to wait receiving the re-transmitted data when the third timer is expired, and to start a fourth timer at the same time to monitor the difference between the earliest arrival time and the latest arrival time of the second retransmission data so as to determine whether the receiver is turned off in time when the fourth timer is expired, thereby ensuring that the receiver keeps an opening state in a time period when the second retransmission data is possibly arrived and improving the success rate of receiving the retransmission data.

Description

The control method of mobile communication terminal downlink data receiving and mobile communication terminal
Technical field
The present invention relates to mobile communication technology, particularly a kind of technology of portable terminal downlink data receiving of discontinuous reception.
Background technology
Discontinuous reception (Discontinuous Reception:DRX) function allows subscriber equipment (UserEquipment:UE) to close receiver under certain conditions, and needn't intercept Physical Downlink Control Channel (Physical Downlink Control Channel:PDCCH), thereby reach the purpose of saving the UE electric weight always.
The basic principle of DRX is illustrated in fig. 1 shown below, DRX cycle intercepts the stage (OnDuration) by the PDCCH that continues and the possible dormant stage (Opportunity for DRX) constitutes, and the unit of On Duration stage and Opportunity for DRX stage length is number of sub frames.In the On Duration stage, UE must continue to intercept the subframe that each comprises PDCCH, indicate with the resource allocation that the uplink and downlink that obtain each subframe transmit, frequency resource when determining that according to the resource allocation of each subframe indication base station assigns is given oneself up-downgoing, and in the enterprising line data processing of the running time-frequency resource that is distributed etc.UE may not need to continue to intercept PDCCH in the Opportunity for DRX stage.
At E-UTRAN (Evolved Universal Terrestrial Radio Access Network, the universal land radio access web of evolution) in the system, in order when not having data to receive and dispatch, to save the battery consumption of UE, UE can carry out the DRX operation, it is the temporary close receiver, with the time of the base station agreement corresponding PDCCH of monitoring that wakes up whether have data need send to UE so that be informed in the dormancy base stations during.The DRX operation includes the parameter of some settings and the timer that some are controlled, the parameter that for example comprises has DRX cycle (DRX Cycle), and the timer that comprises has duration section timer (OnDuration Timer), the nonactive timer of DRX (DRX Inactivity Timer) etc.UE monitors PDCCH at OnDuration in the period, does not send to own data when indicating if monitor the base station, to after date, promptly carries out resting state at On Duration Timer timer.If monitoring PDCCH in the On Duration period, UE knows when the data indication that sends to oneself is arranged, then start DRX InactivityTimer, if before DRX Inactivity Timer timer expires, PDCCH has indicated transfer of data to give this user once more, and DRX Inactivity Timer will restart; Have only the DRX Inactivity Timer timer of working as and On Duration timer all to expire, this UE just can enter the dormant stage.Therefore, the On Duration of UE in DRX cycle keeps activating (Active) state always, then may be in state of activation in the Opportunity forDRX stage, also may be in resting state.
At E-UTRAN (Evolved Universal Terrestrial Radio Access Network, the universal land radio access web of evolution) regulation DRX control and mixing retransmit (HybridAutomatic Repeat Request:HARQ) independent operating separately automatically in the system, also just say, when in HARQ, needing to carry out the downlink data re-transmission, evolution subscriber equipment (eUE) in the LTE system will be regardless of the state of current DRX operation, necessarily start receiver and intercept PDCCH, to prepare to receive downlink retransmitted data according to HARQ RTT (the Round Trip Time) Timer that sets.In addition, HARQ retransmits can further not influence normal DRX operation.And because the asynchronous HARQ of the descending employing of LTE, so also defined the DRX Retransmission Timer timer relevant among the existing LTER8 with descending HARQ Data Transmission Controlling, so that eUE can return to resting state when not receiving data retransmission within a certain period of time, close receiver.
Below with eUE in a subframe in On Duration stage, determine that by the resource allocation indication of intercepting PDCCH evolution base station (eNB) in the LTE system is an example for eUE has distributed the downlink data transmission resource in this subframe, describe the control flow that cooperates of eUE execution DRX and descending HARQ in LTE version 8 (Release 8) in detail.
Referring to shown in Figure 2, be example with a DRX cycle, establishing DRX cycle is 20 subframes, wherein: establishing On Duration stage length is two subframes, and DRX Inactivity Timer length is two subframes, the existing standard regulation, the length of a subframe is 1ms.If in first subframe in On Duration stage, eUE listens to the downlink data of issuing oneself, then the reception control procedure of downlink data specifically comprises the steps:
S201, eUE are that corresponding HARQ process starts first timer in first subframe of current DRX cycle, HARQ RTT (Round Trip Time) Timer timer, and handle downlink data; Simultaneously, eUE starts DRX Inactivity Timer;
Whether S202, eUE judgment data correctly receive, if correct the reception, then eUE is to eNB feeding back ACK (Acknowledgement); Do not receive if downlink data is correct, eUE feeds back NACK (Negative Acknowledgement) to eNB;
The purpose of HARQ RTT Timer timer is to determine that possible data retransmission arrives preceding minimum interval, the length of HARQ RTT Timer timer can only be in open mode to guarantee UE receiver when retransmitting arrival smaller or equal to this minimum interval.In the prior art, eUE receives and handle downlink data generally needs 4ms, promptly the 4th subframe after first subframe of current DRX cycle may be to eNB feeding back ACK or NACK, ACK or NACK arrive the propagation delay time of eNB and the temporal summation of eNB demodulation ACK or NACK is generally 4ms, like this, even eNB demodulates NACK and dispatches data retransmission at once, then 8th subframe of the fastest meeting of data retransmission after first subframe is handed down to eUE, therefore, when setting the length of HARQ RTT Time timer, minimum interval generally is set at 8ms, thereby guarantees at data retransmission arrival front opening receiver, to guarantee that data retransmission can be received.
S203, when HARQ RTT Timer expire and downlink data is not correctly received, be eUE when eNB feedback NACK, eUE opens receiver, finishes resting state, enter accepting state, start another timer DRX Retransmission Timer timer simultaneously.
The startup of DRX Retransmission Timer timer is the stand-by period that receives data retransmission in order to monitor, prevent that eNB mistake is demodulated into NACK when no longer carrying out data re-transmission behind the ACK, eUE waits for unlimitedly, its length maximum wait duration is as required determined, is disposed to eUE by Radio Resource control (Radio Resource Control:RRC) flow process by eNB.At DRX Retransmission Timer run duration,, then after the reception data finish, close receiver and enter into resting state if eUE correctly receives data retransmission; When the arrival of DRX Retransmission Timer setting duration did not all receive data retransmission, eUE then no longer waited for, closes receiver, is transferred to resting state.
If eUE listened in the On Duration stage downlink data indication of issuing oneself is not arranged on the PDCCH, UE just closed receiver after On Duration finished so, entered the dormant stage; If monitoring PDCCH in the On Duration period, UE knows when the data indication that sends to oneself is arranged, then start DRXInactivity Timer, if before DRX Inactivity Timer timer expires, PDCCH has indicated transfer of data to give this user once more, and DRX Inactivity Timer will restart; Have only the DRXInactivity Timer timer of working as and On Duration timer all to expire, this UE just can enter the dormant stage.When eUE failed correct downlink data receiving, eUE also need open receiver to after date at HARQ RTT Timer, and the maximum duration of opening equals the duration of DRX Retransmission Timer.
But, if because the PDCCH of indicating downlink data retransmission transmission loses, caused DRXRetransmission Timer to set duration arrival and all do not received data retransmission, can't receive the once more re-transmission of eNB if eUE enters resting state for this eUE scheduling.
As shown in Figure 3, T 0When constantly listening to the downlink data indication, HARQ RTT Timer is activated, and HARQ RTT Timer is activated to after date DRX Retransmission Timer, if downlink data is not correctly received, then eUE is at T 1Constantly to eNB feedback NACK.ENB establishes the PDCCH that retransmits indication first and appears at T the earliest according to the data retransmission of NACK scheduling eUE 2Constantly, appear at T the latest 4Constantly, if this PDCCH that retransmits indication first loses, then eUE can be to the correct ACK that receives downlink retransmitted data of eNB feedback; If this fashion do not reach maximum retransmission, eNB then once more after the time span of the HARQ RTT Timer distance PDCCH last time after, dispatches data retransmission to eUE once more.Corresponding to may being T the earliest 2The PDCCH of re-transmission first that the moment occurs, it retransmits once more and appears at T the earliest 3Constantly: T 3=T 2+ HARQ RTT Timer appears at T at the latest 5Constantly, T 5=T 2+ HARQ RTTTimer+DRX Retransmission Timer=T 3+ DRX Retransmission Timer.Corresponding to may being T at the latest 4The PDCCH of re-transmission first that the moment occurs, it retransmits once more and appears at T the earliest 5Constantly, T 5=T 4+ HARQ RTT Timer appears at T at the latest 6Constantly, T 6=T 4+ HARQ RTT Timer+DRXRetransmission Timer=T 5+ DRX Retransmission Timer.In fact, data retransmission once more may be at T 3～T 6Any time all arrive.If eUE is according to DRX Retransmission Timer, from T 4Enter resting state after finishing, will miss T 4～T 6The data retransmission that occurs.
Summary of the invention
The embodiment of the invention provides a kind of downlink data acceptance control method and mobile communication terminal, in order to improve the success rate that receives data retransmission.
The control method of first kind of mobile communication terminal downlink data receiving that the embodiment of the invention provides comprises:
When the first timer of the data retransmission first time of advent that is used to monitor downlink data expires, if being in closed condition, receiver opens receiver, and starting the second timer be used to monitor the data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first;
When expiring, described second timer do not receive data retransmission, and when determining that described first timer length is greater than second timer length, close receiver and start the 3rd timer, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Open receiver and wait for receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the 4th timer that monitoring receiver continues to open duration, the length of described the 4th timer is the twice of second timer length.
Further, when expiring, described second timer do not receive data retransmission, and when determining that further described first timer length is not more than second timer length, start the 5th timer and wait for to receive the data that retransmit once more, the length of described the 5th timer for first timer length add second timer length and.
Preferable, described first timer: be when the stage of intercepting of discontinuous reception receives the downlink data transmission indication, to start.
Perhaps, described first timer: be when correct downlink data receiving, determine to send and start after downlink data does not correctly receive indication information to the base station.
And, when the start-up time of described first timer is identical with the transmitting time that does not correctly receive indication information, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive obtain behind the indication information required time and;
When start-up time of described first timer when correctly not receiving the transmitting time of indication information, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described that obtain after correctly not receiving indication information required time and timer start-up time and correctly not receiving time difference between the indication information transmitting time and;
When be later than the transmitting time that does not correctly receive indication information the start-up time of described first timer, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive that the indication information required time obtains and, the value that obtains after deducting timer start-up time again and correctly not receiving time difference between the indication information transmitting time.
Preferable, described control method also comprises: when determining that downlink data is correctly received, return correct reception indication information to the base station.
The control method of second kind of mobile communication terminal downlink data receiving that the embodiment of the invention provides comprises:
When the first timer of the data retransmission first time of advent that is used to monitor downlink data expires, if being in closed condition, receiver opens receiver, and startup is used to monitor the second timer of data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first, and described first timer length is greater than second timer length;
Do not receive data retransmission and close receiver and start the 3rd timer when described second timer expires, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Open receiver and wait for receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the 4th timer that monitoring receiver continues to open duration, the length of described the 4th timer is the twice of second timer length.
First kind of mobile communication terminal that the embodiment of the invention provides comprises:
Be used for when the first timer of data retransmission first time of advent of monitoring downlink data expires, if being in closed condition, receiver opens receiver, and starting the unit of the second timer be used to monitor the data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first;
Be used for when described second timer expires, not receiving data retransmission, and when determining that described first timer length is greater than second timer length, close receiver and start the unit of the 3rd timer, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Be used for opening receiver and wait for and receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the unit that monitoring receiver continues to open the 4th timer of duration, the length of described the 4th timer is the twice of second timer length.
Further, mobile communication terminal also comprises:
Be used for when described second timer expires, not receiving data retransmission, and when determining that further described first timer length is not more than second timer length, start the unit that the 5th timer wait for to receive the data that retransmit once more, the length of described the 5th timer for first timer length add second timer length and.
Wherein, described first timer: be when the stage of intercepting of discontinuous reception receives the downlink data transmission indication, to start; Or when the correct downlink data receiving, determine to send and start after downlink data does not correctly receive indication information to the base station.
Second kind of mobile communication terminal that the embodiment of the invention provides comprises:
Be used for when the first timer of data retransmission first time of advent of monitoring downlink data expires, if being in closed condition, receiver opens receiver, and start the unit of the second timer be used to monitor the data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first, and described first timer length is greater than second timer length;
Be used for not receiving when described second timer expires the unit that data retransmission is closed receiver and started the 3rd timer, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Be used for opening receiver and wait for and receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the unit that monitoring receiver continues to open the 4th timer of duration, the length of described the 4th timer is the twice of second timer length.
In sum, downlink data acceptance control method and mobile communication terminal that the embodiment of the invention provides, utilize the 3rd timer to monitor once more the earliest arrival time of data retransmission and data retransmission time difference between the time of advent the latest first, and when the 3rd timer expires, open the data that receiver waits for that reception retransmits once more, and start the 4th timer simultaneously, with the earliest arrival time of monitoring once more data retransmission and the difference between the time of advent the latest, thereby can when expiring, the 4th timer determine whether in time close receiver.Guaranteed that receiver stays open state in the time period that data retransmission once more may arrive, and has improved the success rate that receives data retransmission.
Description of drawings
Fig. 1 is the DRX controlling mechanism principle schematic of existing mobile communication terminal;
The downlink data that Fig. 2 and Fig. 3 are respectively existing mobile communication terminal receives the control principle schematic diagram;
The mobile communication terminal downlink data that Fig. 4, Fig. 5, Fig. 6 are respectively the embodiment of the invention to be provided receives the control principle schematic diagram.
Embodiment
As shown in Figure 4, the embodiment of the invention is for improve receiving the success rate of data retransmission, as the length of the DRXRetransmission Timer length less than HARQ RTT Timer, i.e. T 3Constantly appear at T 4In the time of constantly, provide following technical scheme:
Step S401, eUE are at T 0When constantly listening to the downlink data indication, start first timer HARQ RTT Timer;
HARQ RTT Timer timer is used to monitor the time of advent of data retransmission first of downlink data, and HARQ RTT Timer timer length should be smaller or equal to the minimum interval between the start-up time of timer and the data retransmission arrival first.
Step S402, HARQ RTT Timer timer are at T 2Constantly expire, if eUE when HARQ RTTTimer timer expires in dormancy, receiver is in closed condition and then opens receiver, and starts second timer: DRX Retransmission Timer timer; If receiver had been in open mode when eUE expired at HARQ RTT Timer timer, then to keep receiver be open mode and start DRX Retransmission Timer timer;
DRX Retransmission Timer timer is used to monitor the data retransmission stand-by period, and length should be the data retransmission first difference between the time of advent and the earliest arrival time, i.e. T the latest 4Deduct T 2
Step S403, DRX Retransmission Timer timer are at T 4Constantly expire, when eUE expires at Retransmission Timer timer, do not enter resting state and start the 3rd timer, Timer X if receive data retransmission then close receiver;
Timer X timer is used to monitor once more the earliest arrival time of data retransmission and data retransmission time difference between the time of advent the latest first, and length is T 3Deduct T 4, the length that promptly equals HARQ RTT Timer timer deducts the length of DRX Retransmission Timer timer.
Step S404, when Timer X timer expires, eUE must open receiver and wait for receive the data that retransmit once more, and starts the 4th timer Timer Y simultaneously;
Timer Y timer be used for monitoring receiver be receive once more data retransmission continue to open duration, it should be once more the earliest arrival time of data retransmission and the difference between the time of advent the latest that the continuing of receiver opened duration, length is T 6Deduct T 3, promptly equal the twice of DRX Retransmission Timer timer length.
Like this, when Timer Y timer run duration receives once more data retransmission, eUE can not close receiver when having other relevant timer to move, when perhaps still not receiving once more data retransmission when Timer Y timer expires, eUE also can close receiver when not having other relevant timer to move.Thereby, guaranteed at T 4～T 6Receiver is in open mode during this time, can receive the data retransmission once more that may occur, and make receiver at T 4～T 3Do not have once more the stage of data retransmission to be in closed condition during this time, saved the electric weight of eUE.
In the above-described embodiments, if limit the length of the length of DRX Retransmission Timer less than HARQRTT Timer, then in step S403, eUE can directly start the 3rd timer TimerX, if the length of unqualified DRX Retransmission Timer must be less than the length of HARQ RTT Timer, after then needing to determine the length of length of DRX Retransmission Timer earlier less than HARQ RTT Timer, restart the 3rd timer Timer X, otherwise do not start the 3rd timer, but starting the 5th timer, concrete technical scheme is as follows.
As shown in Figure 5, be not less than the length of HARQ RTT Timer, i.e. T when the length of DRX Retransmission Timer 4Constantly appear at T 3In the time of constantly, eUE keeps receiver to be open mode and to start the 5th timer, NEW Timer timer after DRX Retransmission Timer expires, its length is HARQ RTT Timer and DRX Retransmission Timer sum, and the receiver of eUE just can be at T like this 4～T 6Stage is in open mode, waits for receiving the data retransmission once more that may occur.
Fig. 4 and embodiment illustrated in fig. 5 in, the minimum interval of setting HARQ RTT Timer timer length comprises that following three part-time sum: eUE receive and handles the propagation delay time that downlink data required time, eUE send to ACK or the NACK of eNB, and eNB demodulation and handle ACK or the NACK required time.General, eUE receives and handle downlink data generally needs 4ms, i.e. the 4th subframe after first subframe of current DRX cycle, T 1Constantly may be to eNB feeding back ACK or NACK, ACK or NACK arrive the propagation delay time of eNB and the temporal summation of eNB demodulation ACK or NACK is generally 4ms, like this, even eNB demodulates NACK and dispatches data retransmission at once, then 8th subframe of the fastest meeting of data retransmission after first subframe is handed down to eUE, therefore, when setting the length of HARQ RTTTime timer, minimum interval generally is set at 8ms.
Consider the correct downlink data receiving of eUE and when the eNB feeding back ACK, there is not downlink retransmitted data to arrive, therefore the embodiment of the invention is further to reduce the electric energy loss of eUE, following improvement project also is provided, eUE is only after eNB feedback NACK, restart the HARQ RTTTimer timer that the control data retransmission receives, avoided the timer behind the correct downlink data receiving to start, thereby saved the power consumption of eUE.As shown in Figure 6, comprise the steps:
Step S601, eUE are at T 0Receive constantly and handle downlink data, whether judgment data correctly receives;
Step S602, if correct the reception, then eUE is at T 1Constantly to the eNB feeding back ACK; Do not receive if downlink data is correct, eUE is at T 1Feed back NACK to eNB constantly, and be that corresponding HARQ process starts timer, the embodiment of the invention is referred to as eNB processing delay timer (eNB ProcessingTimer);
Step S603, when eNB Processing Timer timer expires, if eUE is in dormancy, receiver is in closed condition, and eUE opens receiver and finishes resting state, enter the accepting state of data retransmission, start DRX Retransmission Timer timer simultaneously.
Step S604, DRX Retransmission Timer timer are at T 4Constantly expire, when eUE expires at DRXRetransmission Timer timer, do not enter resting state and start the 3rd timer, Timer X if receive data retransmission then close receiver;
Timer X timer is used to monitor once more the earliest arrival time of data retransmission and data retransmission time difference between the time of advent the latest first, and length is T 3Deduct T 4, the length that promptly equals HARQ RTT Timer timer deducts the length of DRX Retransmission Timer timer.
Step S605, when Timer X timer expires, eUE must open receiver and wait for receive the data that retransmit once more, and starts the 4th timer Timer Y simultaneously.
Timer Y timer be used for monitoring receiver be receive once more data retransmission continue to open duration, it should be once more the earliest arrival time of data retransmission and the difference between the time of advent the latest that the continuing of receiver opened the duration maximum, length is T 6Deduct T 3, promptly equal the twice of DRX Retransmission Timer timer.
Wherein: the effect of eNB Processing Timer timer is still the minimum interval before the monitoring data retransmission arrives, the length of eNB processing delay timer must be less than or equal to this minimum interval, to guarantee arriving the front opening receiver at data retransmission, when the expiring of eNB processing delay timer, if eUE is in resting state, eUE need open the receiver machine and finish resting state, receives data retransmission by the time.
EUE starts eNB Processing Timer timer can be identical with the time that sends NACK with the time, for example same subframe or same millisecond (ms), also can be different, as long as the length of this timer is smaller or equal to time interval that the start-up time of eNB Processing Timer timer and the data retransmission of this downlink data the earliest may be between the times of advent.Data retransmission the earliest may the time of advent and start-up time of eNB ProcessingTimer timer between the time interval be minimum interval before data retransmission arrives, eNB Processing Timer timer expires in the time of must or just in time reaching before data retransmission arrives, and opens receiver thereby trigger eUE.
When the transmitting time of start-up time of eNB Processing Timer timer and NACK is identical, minimum interval is just: correctly do not receive the propagation delay time that indication information NACK transmits between mobile communication terminal and base station, add the base station handle obtain behind the NACK required time and.When start-up time of eNBProcessing Timer timer during early than the transmitting time of NACK, should correspondingly add the time difference between eNB Processing Timer timer start-up time and the NACK transmitting time between minimum time, otherwise when be later than the transmitting time of NACK the start-up time of eNB Processing Timer timer, should the value that obtain after the time difference that deduct again between eNB Processing Timer timer start-up time and the NACK transmitting time between minimum time.
Below be all preferred embodiment mutually with the transmitting time of start-up time of eNB Processing Timer timer and NACK and be elaborated.
EUE receives data retransmission when DRX Retransmission Timer timer run duration, then after receiving data retransmission, close receiver and enter resting state once more, perhaps do not receive data retransmission, then after DRXRetransmission Timer timer is set duration arrival, close receiver and enter resting state once more at DRXRetransmission Timer timer run duration.Certainly, if when DRX Retransmission Timer timer expires, DRX Inactivity Timer is also not yet due, and then eUE need close receiver and enters resting state once more at the DRX Inactivity Timer timer Shi Caineng that expires.
Like this, after eUE downlink data receiving and the correct reception of judgment data quilt,, therefore do not start eNB processing delay timer, thereby reduced the number of starts of timer, avoided extra power consumption because the data re-transmission in later stage can not take place.Particularly in the good environment of communication condition, the data re-transmission odds is very low, has saved the power consumption of eUE especially greatly.
Referring to Fig. 4 as seen, the minimum interval of setting the length of HARQ RTT Timer timer comprises that following three part-time sum: eUE receive and handles the propagation delay time that downlink data required time, eUE send to ACK or the NACK of eNB, and eNB demodulation and handle ACK or the NACK required time.And referring to shown in Figure 6, the minimum interval of setting the length of corresponding eNB Processing Timer timer in the embodiment of the invention only need consider that eUE sends to propagation delay time and the eNB demodulation NACK required time of the NACK of eNB, common, this two parts time sum equals eUE substantially and receives processing downlink data required time, so when setting the maximum duration of eNB processing delay timer according to the propagation delay time of ACK or NACK and eNB demodulation ACK or NACK required time sum, 4ms for example, thereby further reduced the running time of first timer, also just further saved the electric energy loss of eUE.Certainly, also eNB Processing Timer length of timer can be set at 3ms or 2ms etc.
The basis of above-mentioned analysis is that eUE is not after judgement has correct downlink data receiving, can obtain to send the ascending resource of ACK or NACK feedback information to eNB, thereby successfully send ACK or NACK feedback information, duplex mode according to the FDD system, in the FDD system without any problem, but in the TDD system, owing to there are 7 kinds of different uplink and downlink timeslot proportionings, after the eUE judgement does not have correct downlink data receiving, might not have uplink resources available at once, be used for feeding back ACK or NACK, this has just caused the long enough that the duration of DRX Retransmission Timer must be set, could guarantee that eNB dispatches the data retransmission of eUE in DRX Retransmission Timer run duration.Therefore prior art is for the TDD system, must consider eUE in the some time after opening receiver all possibility do not receive data retransmission, this has just caused meaningless power consumption.Simultaneously, this means that also eNB must dispatch the downlink retransmitted data that sends to this eUE in the remaining time at DRXRetransmission Timer, this will reduce the flexibility of eNB scheduling, and cause eUE can not use less DRX RetransmissionTimer, and as 1ms, 2ms etc., and must adopt as 16ms, 24ms, the numerical value that 33ms etc. are bigger, thus further cause the electricity-saving function of DRX mechanism to be had a greatly reduced quality.And after the technical scheme that the employing embodiment of the invention provides, in the TDD system, because the start-up time of eNB Processing Timer timer is for sending the time of NACK, when therefore setting eNB Processing Timer timer maximum duration, needn't consider because time delay different between the downlink transfer that difference caused of TDD uplink and downlink timeslot proportioning and employed descending sub frame and corresponding uplink ACK or the NACK feedback information, only need to consider that eUE sends to propagation delay time and the eNB demodulation NACK required time of the NACK of eNB, thereby in the TDD system, further reduced running time of first timer, and improved the flexibility of eNB scheduling data retransmission.
Need to prove, among above-mentioned all embodiment, after the correct reception of eUE judgment data, can not feed back any information to eNB yet, only when correctly not receiving, feed back NACK to eNB, default data was not correctly received data retransmission when receiving NACK when eNB received any feedback information of eUE like this.
The embodiment of the invention is controlled to be example with the reception of a downlink data and describes technical scheme in detail, and in fact, the reception control procedure of each downlink data is identical.
The embodiment of the invention also provides first kind of mobile communication terminal, comprising:
Be used for when the first timer of data retransmission first time of advent of monitoring downlink data expires, if being in receiver is in closed condition then opens receiver, and starting the unit of the second timer be used to monitor the data retransmission stand-by period, the length of first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first;
Be used for when second timer expires, not receiving data retransmission, and definite first timer length is during greater than second timer length, close receiver and start the unit of the 3rd timer, the length of the 3rd timer deducts the difference of second timer length for first timer length;
Be used for opening receiver and wait for and receive the data that retransmit once more when the 3rd timer expires, and start and be used for the unit that monitoring receiver continues to open the 4th timer of duration, the length of the 4th timer is the twice of second timer length.
Further, first kind of mobile communication terminal that the embodiment of the invention provides also comprises:
Be used for when second timer expires, not receiving data retransmission, and when determining that further first timer length is not more than second timer length, start the unit that the 5th timer wait for to receive the data that retransmit once more, the length of the 5th timer for first timer length add second timer length and.
The embodiment of the invention also provides second kind of mobile communication terminal, comprising:
Be used for when the first timer of data retransmission first time of advent of monitoring downlink data expires, if being in closed condition, receiver opens receiver, and start the unit of the second timer be used to monitor the data retransmission stand-by period, the length of first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first, and first timer length is greater than second timer length;
Be used for not receiving the unit that data retransmission is closed receiver and started the 3rd timer when second timer expires, the length of the 3rd timer deducts the difference of second timer length for first timer length;
Be used for opening receiver and wait for and receive the data that retransmit once more when the 3rd timer expires, and start and be used for the unit that monitoring receiver continues to open the 4th timer of duration, the length of the 4th timer is the twice of second timer length.
Wherein, first timer: be when the stage of intercepting of discontinuous reception receives the downlink data transmission indication, to start; Perhaps
Be when correct downlink data receiving, determine to send and start after downlink data does not correctly receive indication information to the base station.
In sum, downlink data acceptance control method and mobile communication terminal that the embodiment of the invention provides, utilize the TimerX timer to monitor once more the earliest arrival time of data retransmission and data retransmission time difference between the time of advent the latest first, and when Timer X timer expires, open the data that receiver waits for that reception retransmits once more, and start timer Timer Y simultaneously, with the earliest arrival time of monitoring once more data retransmission and the difference between the time of advent the latest, thereby can when expiring, Timer Y determine whether in time close receiver.Thereby guaranteed that receiver stays open state in the time period that data retransmission once more may arrive, and has improved the reception success rate of data retransmission.
Further, the embodiment of the invention is only being received the timer that the back startup is used to monitor the data retransmission time of reception by correct when downlink data receiving and judgment data, start this timer under the situation of having avoided data correctly to receive, thereby significantly reduced the number of starts of timer, avoided extra power consumption.Further, also just further saved the electric energy loss of eUE owing to for sending the time of NACK, therefore can reduce the setting duration of timer, thereby further reduce the running time of first timer the start-up time of timer.And in the TDD system, avoid UE to open receiver in advance and wait for the reception data retransmission, improved the flexibility of eNB scheduling data retransmission simultaneously.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (18)

1. the control method of a mobile communication terminal downlink data receiving is characterized in that, comprising:
When the first timer of the data retransmission first time of advent that is used to monitor downlink data expires, if being in closed condition, receiver opens receiver, and starting the second timer be used to monitor the data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first;
When expiring, described second timer do not receive data retransmission, and when determining that described first timer length is greater than second timer length, close receiver and start the 3rd timer, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Open receiver and wait for receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the 4th timer that monitoring receiver continues to open duration, the length of described the 4th timer is the twice of second timer length.
2. control method as claimed in claim 1 is characterized in that, also comprises:
When expiring, described second timer do not receive data retransmission, and when determining that further described first timer length is not more than second timer length, start the 5th timer and wait for to receive the data that retransmit once more, the length of described the 5th timer for first timer length add second timer length and.
3. control method as claimed in claim 1 or 2 is characterized in that, described first timer: be to start when the stage of intercepting of discontinuous reception receives the downlink data transmission indication.
4. control method as claimed in claim 1 or 2 is characterized in that, described first timer: be when correct downlink data receiving, determine to send to the base station and start after downlink data does not correctly receive indication information.
5. control method as claimed in claim 4, it is characterized in that, when the start-up time of described first timer is identical with the transmitting time that does not correctly receive indication information, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive obtain behind the indication information required time and;
When start-up time of described first timer when correctly not receiving the transmitting time of indication information, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described that obtain after correctly not receiving indication information required time and timer start-up time and correctly not receiving time difference between the indication information transmitting time and;
When be later than the transmitting time that does not correctly receive indication information the start-up time of described first timer, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive that the indication information required time obtains and, the value that obtains after deducting timer start-up time again and correctly not receiving time difference between the indication information transmitting time.
6. control method as claimed in claim 5, it is characterized in that, describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive obtain behind the indication information required time and be: 4 milliseconds.
7. control method as claimed in claim 1 or 2 is characterized in that, also comprises: when determining that downlink data is correctly received, return correct reception indication information to the base station.
8. the control method of a mobile communication terminal downlink data receiving is characterized in that, comprising:
When the first timer of the data retransmission first time of advent that is used to monitor downlink data expires, if being in closed condition, receiver opens receiver, and startup is used to monitor the second timer of data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first, and described first timer length is greater than second timer length;
Do not receive data retransmission and close receiver and start the 3rd timer when described second timer expires, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Open receiver and wait for receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the 4th timer that monitoring receiver continues to open duration, the length of described the 4th timer is the twice of second timer length.
9. control method as claimed in claim 8 is characterized in that, described first timer: be to start when the stage of intercepting of discontinuous reception receives the downlink data transmission indication.
10. control method as claimed in claim 8 is characterized in that, described first timer: be when correct downlink data receiving, determine to send to the base station and start after downlink data does not correctly receive indication information.
11. control method as claimed in claim 10, it is characterized in that, when the start-up time of described first timer is identical with the transmitting time that does not correctly receive indication information, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive obtain behind the indication information required time and;
When start-up time of described first timer when correctly not receiving the transmitting time of indication information, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described that obtain after correctly not receiving indication information required time and timer start-up time and correctly not receiving time difference between the indication information transmitting time and;
When be later than the transmitting time that does not correctly receive indication information the start-up time of described first timer, described minimum interval is: describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive that the indication information required time obtains and, the value that obtains after deducting timer start-up time again and correctly not receiving time difference between the indication information transmitting time.
12. control method as claimed in claim 8, it is characterized in that, describedly correctly do not receive the propagation delay time that indication information transmits between mobile communication terminal and base station, add the base station handle described correctly do not receive obtain behind the indication information required time and be: 4 milliseconds.
13. as the arbitrary described control method of claim 8～12, it is characterized in that, also comprise: when determining that downlink data is correctly received, return correct reception indication information to the base station.
14. a mobile communication terminal is characterized in that, comprising:
Be used for when the first timer of data retransmission first time of advent of monitoring downlink data expires, if being in closed condition, receiver opens receiver, and starting the unit of the second timer be used to monitor the data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first;
Be used for when described second timer expires, not receiving data retransmission, and when determining that described first timer length is greater than second timer length, close receiver and start the unit of the 3rd timer, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Be used for opening receiver and wait for and receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the unit that monitoring receiver continues to open the 4th timer of duration, the length of described the 4th timer is the twice of second timer length.
15. mobile communication terminal as claimed in claim 14 is characterized in that, also comprises:
Be used for when described second timer expires, not receiving data retransmission, and when determining that further described first timer length is not more than second timer length, start the unit that the 5th timer wait for to receive the data that retransmit once more, the length of described the 5th timer for first timer length add second timer length and.
16., it is characterized in that described first timer: be when the stage of intercepting of discontinuous reception receives the downlink data transmission indication, to start as claim 14 or 15 described mobile communication terminals; Perhaps
Be when correct downlink data receiving, determine to send and start after downlink data does not correctly receive indication information to the base station.
17. a mobile communication terminal is characterized in that, comprising:
Be used for when the first timer of data retransmission first time of advent of monitoring downlink data expires, if being in closed condition, receiver opens receiver, and start the unit of the second timer be used to monitor the data retransmission stand-by period, the length of described first timer is smaller or equal to first timer start-up time and the minimum interval of data retransmission between the time of advent first, and described first timer length is greater than second timer length;
Be used for not receiving when described second timer expires the unit that data retransmission is closed receiver and started the 3rd timer, the length of described the 3rd timer deducts the difference of second timer length for first timer length;
Be used for opening receiver and wait for and receive the data that retransmit once more when described the 3rd timer expires, and start and be used for the unit that monitoring receiver continues to open the 4th timer of duration, the length of described the 4th timer is the twice of second timer length.
18. mobile communication terminal as claimed in claim 17 is characterized in that, described first timer:
Be when the stage of intercepting of discontinuous reception receives the downlink data transmission indication, to start; Perhaps
Be when correct downlink data receiving, determine to send and start after downlink data does not correctly receive indication information to the base station.
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