CN101827439A - Time alignment timer adjustment method, and related device and system - Google Patents
Time alignment timer adjustment method, and related device and system Download PDFInfo
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- CN101827439A CN101827439A CN 201010144671 CN201010144671A CN101827439A CN 101827439 A CN101827439 A CN 101827439A CN 201010144671 CN201010144671 CN 201010144671 CN 201010144671 A CN201010144671 A CN 201010144671A CN 101827439 A CN101827439 A CN 101827439A
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Abstract
The embodiment of the invention discloses a time alignment timer adjustment method, which comprises the following steps: when the timer reaches the preset transmission time length, a base station transmits a time alignment element carrying a first time alignment value to a user terminal; the base station judges whether a confirmation message corresponding to the time alignment element back fed by the user terminal is received within the preset feedback time length since transmitting the time alignment element; if not, the base station transmits a time alignment retransmission element carrying the first time alignment value to the user terminal; after receiving the first time alignment retransmission element, the user terminal judges whether the time alignment element or time alignment retransmission element is received within the preset time length difference before receiving the first time alignment retransmission element; and if so, transmitting the confirmation message corresponding to the first time alignment retransmission element to the base station. The embodiment of the invention also provides a corresponding device and system which can reduce the phenomenon of repeatedly adjusting the timer by the user terminal and mistakenly reporting of the upstream stepout information by the base station.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of time alignment timer adjustment method and relevant device and system.
Background technology
Because the uncertainty of user terminal (UE, User Equipment) position in the wireless environment causes the time-delay difference of the upward signal arrival base station (NODEB) of different UEs, even same UE delays time also in variation at any time in moving process.In order to make the base station can correct demodulation upward signal in regular hour window scope, the interference of avoiding the uplink time delay because of each UE to cause simultaneously, time unifying (TA, Time alignment) adjustment is introduced into Long Term Evolution (LTE, Long Term Evolution).
It is constantly to measure the reference signal (RS that UE reports by the base station that TA adjusts, Reference Signal), detect up time delay information (being the TA value), send the TA control (MCE of unit that carries the TA value then, MAC Control Element) notifies UE to adjust up transmitting time, thereby guarantee that the upward signal that this UE sends can arrive in the time window of expection.
UE side and base station side are respectively safeguarded a TA timer, and by the identical overtime duration of base station configuration, when the TA of base station side timer expiry, and base station reporting uplink step-out then.The TA value is that the base station sends to UE by MCE, uses and mixes automatic repeat requests (HARQ, Hybrid Automatic Repeat-reQuest) channel transfer.After the base station sends TA MCE, if receive the confirmation message (ACK, ACKnowledge), then think and send successfully, if do not receive ACK, (NACK NegativeAcknowledgement), demodulation error message (DTX) or do not have response message (No Reponse), then thinks to send failure and receive nack message.After the ACK feedback is received in the base station, restart the TA timer.If the base station can not get the ACK feedback after UE sends the TA value, then the TA timer of base station side can not get restarting, and causes the TA timer expiry of base station side, reports this UE uplink loss.
Because the demodulation of ACK/NACK itself has certain error rate, therefore, may occur that UE correctly receives the TA value and behind base station feedback ACK, the base station receives the situation of NACK/DTX/No Reponse, when causing the base station to receive NACK/DTX/No Reponse, can't judge whether UE correctly receives TAMCE, thereby the base station to the control that sends the TA value difficulty has just appearred, and can produce the problem that UE repeats to adjust TA timer or base station mistake reporting uplink step-out information.
Summary of the invention
The embodiment of the invention provides a kind of time alignment timer adjustment method and relevant device and system, can reduce the generation that UE repeats to adjust timer and base station mistake reporting uplink step-out information phenomenon.
The embodiment of the invention provides a kind of time alignment timer adjustment method, comprising:
When timer reaches predetermined when sending duration, send the time unifying unit of carrying very first time alignment value to user terminal;
Whether judgement receives the corresponding affirmation message of described time unifying unit of user terminal feedback in sending the first feedback on reservation duration of described time unifying;
If do not receive, then send the time unifying retransmission element of carrying very first time alignment value to user terminal.
The embodiment of the invention provides a kind of time alignment timer adjustment method, comprising:
Receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends;
Judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration;
If then send the affirmation message of very first time alignment retransmission element correspondence to the base station.
The embodiment of the invention provides a kind of base station, comprising:
First sending module is used for reaching predetermined when sending duration when timer, sends the time unifying unit of carrying very first time alignment value to user terminal;
First judge module is used to judge the corresponding affirmation message of described time unifying unit of whether receiving the user terminal feedback in sending the first feedback on reservation duration of described time unifying, if do not receive, then triggers second sending module execution associative operation;
Second sending module is used for sending the time unifying retransmission element of carrying very first time alignment value to user terminal.
The embodiment of the invention provides a kind of user terminal, comprising:
Receiver module is used to receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends;
Judge module is used to judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration, if then trigger sending module and carry out associative operation;
Sending module is used for the affirmation message to base station transmission very first time alignment retransmission element correspondence.
The embodiment of the invention provides a kind of communication system, comprising:
The base station is used for reaching predetermined when sending duration when timer, sends the time unifying unit of carrying very first time alignment value to user terminal; Whether judgement receives the corresponding affirmation message of described time unifying unit of user terminal feedback in sending the first feedback on reservation duration of described time unifying; If do not receive, then send the time unifying retransmission element of carrying very first time alignment value to user terminal;
User terminal is used to receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends; Judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration; If then send the affirmation message of very first time alignment retransmission element correspondence to the base station.
Compared with prior art, the embodiment of the invention comprises following beneficial effect:
In the embodiment of the invention, after the time unifying unit of a TA value is carried in transmission in the base station,, then send the time unifying retransmission element of carrying a TA value to UE if in the feedback on reservation duration, do not receive acknowledge message; UE is after receiving the very first time alignment retransmission element of carrying a TA value, before receiving very first time alignment retransmission element, be scheduled to differ time of receipt (T of R) alignment unit in the duration if judge, then can determine, this time unifying unit is that the base station is with once obtaining with the TA value that very first time alignment retransmission element is carried, UE has adjusted timer according to this TA value, therefore, UE directly sends acknowledge message to the base station, thereby can reduce the generation that UE repeats to adjust timer and base station mistake reporting uplink step-out information phenomenon.
Description of drawings
Fig. 1 is the schematic diagram of an embodiment of time alignment timer adjustment method in the embodiment of the invention;
Fig. 2 is the schematic diagram of another embodiment of time alignment timer adjustment method in the embodiment of the invention;
Fig. 3 is the schematic diagram of another embodiment of time alignment timer adjustment method in the embodiment of the invention;
Fig. 4 is the schematic diagram of an embodiment of base station in the embodiment of the invention;
Fig. 5 be embodiment illustrated in fig. 4 in the schematic diagram of an embodiment of second judge module;
Fig. 6 is the schematic diagram of an embodiment of user terminal in the embodiment of the invention;
Fig. 7 is the schematic diagram of an embodiment of communication system in the embodiment of the invention;
Fig. 8 is the schematic diagram of another embodiment of communication system in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of time alignment timer adjustment method and relevant device and system.Below be elaborated respectively.
See also Fig. 1, time alignment timer adjustment method embodiment comprises in the embodiment of the invention:
110, reach predetermined when sending duration when timer, send the time unifying unit of carrying very first time alignment value to user terminal;
In the embodiment of the invention, abbreviate the time unifying timer as timer.
The executive agent of present embodiment can be base station (NODEB).The time of the timer of base station monitors base station side, when timer reaches predetermined when sending duration, the base station can send to user terminal carry the TA MCE of a TA value.
120, judge this corresponding affirmation message of time unifying unit of in sending time unifying unit feedback on reservation duration, whether receiving the user terminal feedback, if do not receive that then execution in step 130, otherwise execution in step 140;
The base station can be when transmission TA MCE reaches the feedback on reservation duration, whether judgement receives the ACK message of this TAMCE correspondence of UE feedback in sending this TA MCE feedback on reservation duration, if do not receive, then can send the time unifying retransmission element (TA retrans MCE) of carrying a TA value to user terminal.
If judge this corresponding affirmation message of time unifying unit of receiving the user terminal feedback in sending time unifying unit feedback on reservation duration, then timer restart can be triggered in the base station.
Predetermined transmission duration and two feedback on reservation duration sums should be less than the predetermined overtime durations of timer, and for example, when predetermined overtime duration was 500 milliseconds, the predetermined duration that sends can be 300 milliseconds, and the feedback on reservation duration can be set to less than 100 milliseconds.
Preferably, the feedback on reservation duration can be set to more than or equal to 8 milliseconds and smaller or equal to 33 milliseconds.
130, send the time unifying retransmission element of carrying very first time alignment value to user terminal;
140, trigger timer restart.
See also Fig. 2, another embodiment of time alignment timer adjustment method comprises in the embodiment of the invention:
210, reach predetermined when sending duration when timer, send the time unifying unit of carrying very first time alignment value to user terminal;
220, judge this corresponding affirmation message of time unifying unit of in sending time unifying unit feedback on reservation duration, whether receiving the user terminal feedback, if do not receive that then execution in step 230, otherwise execution in step 260;
230, send the time unifying retransmission element of carrying very first time alignment value to user terminal;
240, judge the affirmation message of in up-to-date transmitting time alignment retransmission element feedback on reservation duration, whether receiving this time unifying retransmission element correspondence, if do not receive that then execution in step 250, otherwise execution in step 260;
In the present embodiment, after execution in step 230, the affirmation message of whether not receiving this time unifying retransmission element correspondence in up-to-date transmitting time alignment retransmission element feedback on reservation duration can be judged in the base station, and timer does not reach predetermined overtime duration, if, then repeated execution of steps 230, otherwise trigger timer restart.
250, judge whether timer reaches predetermined overtime duration, and if not, then execution in step 230, otherwise execution in step 260;
Particularly, can guarantee that timer can not reach predetermined overtime duration by the predetermined maximum times that allows the transmitting time alignment retransmission element is set.For example, when predetermined overtime duration is 500 milliseconds, predetermined transmission duration is 300 milliseconds, when the feedback on reservation duration was 30 milliseconds, can set predetermined maximum times was 2, if the affirmation message of time of receipt (T of R) alignment retransmission element correspondence not, whether the number of times of then judging the transmitting time alignment retransmission element reaches predetermined maximum times 2, if do not reach, determine that then timer does not reach predetermined overtime duration, repeats the step to user terminal transmitting time alignment retransmission element.
Be understandable that judge whether timer reaches predetermined overtime duration, be scheduled to maximum times realizes except can whether reaching by the number of times of judging the transmitting time alignment retransmission element, can also be by realizing with other existing known manner.
260, trigger timer restart.
The foregoing description is the time alignment timer adjustment method from the angle explanation embodiment of the invention of base station, describes the time alignment timer adjustment method that illustrates the embodiment of the invention from the angle of user terminal below.
See also Fig. 3, Fig. 3 is another embodiment of time alignment timer adjustment method in the embodiment of the invention, comprising:
310, receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends;
Executive agent in the present embodiment can be user terminal.
320, judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration, if then execution in step 330, otherwise execution in step 340;
In embodiment illustrated in fig. 2, the base station is after the TAMCE of a TA value is carried in the user terminal transmission, if do not receive the affirmation message of this TA MCE correspondence of user terminal feedback in sending this TA MCE feedback on reservation duration, then the base station sends the time unifying retransmission element (TAretrans MCE) of carrying a TA value to user terminal; If do not receive the affirmation message of this time unifying retransmission element correspondence in up-to-date transmitting time alignment retransmission element feedback on reservation duration, and timer do not reach predetermined overtime duration, then repeats to send the time unifying retransmission element of carrying a TA value to user terminal.
As seen, the base station sends the time that differs between the time unifying unit of the very first time alignment retransmission element carry a TA value and last transmission cycle transmission or the time unifying retransmission element, all surpass predetermined duration and the feedback on reservation duration sum of sending at least, as long as therefore the predetermined duration that differs is set smaller or equal to predetermined duration and the feedback on reservation duration sum of sending, then can determine, predetermined time unifying unit and the time unifying retransmission element that receives in the duration that differ before receiving very first time alignment retransmission element, the TA value of carrying with very first time alignment retransmission element is that the base station once obtains together, and UE has adjusted timer according to this TA value.
330, send the affirmation message of very first time alignment retransmission element correspondence to the base station;
If step 320 is judged, illustrate that UE has adjusted timer according to this TA value, therefore directly to the base station feedback acknowledge message, thereby can avoid to timer repeat adjust, can reduce again NODEB after sending TA MCE because of not receiving the generation of the wrong reporting uplink step-out of acknowledge message information phenomenon.
340, adjust timer according to very first time alignment value, and send the affirmation message of very first time alignment retransmission element correspondence to the base station.
If step 320 is judged not, illustrate that UE did not receive this TA value before receiving very first time alignment retransmission element, therefore UE need adjust timer according to a TA value, again to the base station feedback acknowledge message, thus can further reduce NODEB after sending TA MCE because of not receiving the generation of the wrong reporting uplink step-out of acknowledge message information phenomenon.
Be understandable that, do not receive time unifying unit or time unifying retransmission element in the duration if in step 320, judge predetermined the differing before the reception very first time alignment retransmission element, illustrate that UE does not adjust timer according to this TA value, then UE can end operation, make the base station because of not receiving ACK message reporting uplink step-out information, therefore, step 340 is omissible.
When the base station received NACK/DTX/No Reponse, the time alignment timer adjustment method as if not adopting in the embodiment of the invention then can produce the problem that UE repeats to adjust TA timer or base station mistake reporting uplink step-out information.For example, after UE correctly receives the TA value, when the base station receives NACK/DTX/NoReponse: (1) if TA MCE is retransmitted in the base station, then UE might repeat to adjust the TA timer with the TA value of once obtaining according to the base station, causes tuningout TA timer; (2) if TA MCE is not retransmitted in the base station, then the TA timer of base station side can not get restarting, and causes this TA timer expiry, wrong report uplink loss information.
In conjunction with Fig. 1 and as can be known embodiment illustrated in fig. 3, after the time unifying unit of a TA value is carried in transmission in the base station,, then send the time unifying retransmission element of carrying a TA value to UE if in the feedback on reservation duration, do not receive acknowledge message; UE is after receiving the very first time alignment retransmission element of carrying a TA value, before receiving very first time alignment retransmission element, be scheduled to differ time of receipt (T of R) alignment unit in the duration if judge, then can determine, this time unifying unit is that the base station is with once obtaining with the TA value that very first time alignment retransmission element is carried, UE has adjusted timer according to this TA value, therefore, UE directly sends acknowledge message to the base station, thereby can reduce the generation that UE repeats to adjust timer and NODEB mistake reporting uplink step-out information phenomenon.
In conjunction with Fig. 2 and as can be known embodiment illustrated in fig. 3, UE is after receiving the very first time alignment retransmission element of carrying a TA value, if judge the predetermined time of receipt (T of R) alignment unit or time unifying retransmission element that differs in the duration before receiving very first time alignment retransmission element, then can determine, predetermined time unifying unit and the time unifying retransmission element that receives in the duration that differ before receiving very first time alignment retransmission element, the TA value of carrying with very first time alignment retransmission element is that the base station is with once obtaining, UE has adjusted timer according to this TA value, therefore, UE directly sends acknowledge message to the base station, thereby can reduce the generation that UE repeats to adjust timer and NODEB mistake reporting uplink step-out information phenomenon.
With a concrete application scenarios time alignment timer adjustment method in the embodiment of the invention is elaborated below.
Suppose that predetermined overtime duration is 500 milliseconds, predetermined transmission duration is 300 milliseconds, and the feedback on reservation duration is 8 milliseconds, and predetermined maximum times is 3 times, and being scheduled to differ duration is 300 milliseconds;
The base station reaches predetermined when sending 300 milliseconds of durations at timer, sends to UE and carries the TA MCE of a TA value.
UE receives the TA MCE that carries a TA value that the base station sends, and has adjusted timer according to a TA value, has sent the ACK message of this TA MCE correspondence to the base station.
Because the ACK message of TA MCE correspondence is become NACK message by the demodulation mistake, the ACK message of this TA MCE correspondence is not received in the base station in 8 milliseconds of the TA MCE of a TA value are carried in transmission, and the TA retrans MCE of a TA value is carried to the UE transmission for the first time in the base station.
After UE receives the TA retrans MCE that carries a TA value, judgement predetermined before receiving this TA retransMCE differs in 300 milliseconds of the durations and receives TA MCE, determine to have adjusted timer according to the TA value in this transmission cycle, directly send the ACK message of this TA retrans MCE correspondence to the base station.
Because the ACK message of TA retrans MCE correspondence is by the demodulation mistake, the ACK message of this TA retrans MCE correspondence is not received in the base station in sending for the first time 8 milliseconds of TA retrans MCE that carry a TA value, the TA retrans MCE of a TA value is carried to the UE transmission for the second time in the base station;
After UE receives the TA retrans MCE that carries a TA value once more, judgement predetermined before receiving this TAretrans MCE differs in 300 milliseconds of the durations and receives TA MCE and TA retrans MCE, determine to have adjusted timer according to the TA value in this transmission cycle, directly send the ACK message of this TA retransMCE correspondence to the base station.
The ACK message of this TAretrans MCE correspondence, base station triggers timer restart are received in the base station in sending for the second time 8 milliseconds of TA retrans MCE that carry a TA value.
Should be with in the scene, the base station is after carrying the TA MCE of a TA value to the UE transmission, and UE receives this TA MCE and has adjusted timer, but because the demodulation mistake, the ACK message of TA MCE correspondence is not received in the base station; The TA retrans MCE of a TA value is carried by sending to UE in the base station, makes the UE can be once more to base station feedback ACK message, thereby can reduce the phenomenon of base station mistake reporting uplink step-out information; And, UE is after receiving the TA retrans MCE of a TA value, receive by judging this TA retransMCE is predetermined before to differ whether receive TA MCE or TA retrans MCE in the duration, can determine whether to adjust timer according to the TA value in this transmission cycle, determining whether need to adjust timer, thereby can reduce the phenomenon that UE repeats to adjust timer.
In addition, in the prior art, for reducing the rate of false alarm of uplink loss, the base station sends N TA MCE by the equispaced in the predetermined overtime duration of timer, if N TA MCE all issues failure, then think uplink loss, the N value is selected big more, and then the uplink loss rate of false alarm is more little.For example, when the predetermined overtime duration of timer was 500 milliseconds, the base station sent 3 TA MCE by the equispaced in these 500 milliseconds.Though this scheme of the prior art can reduce the uplink loss rate of false alarm, has increased offered load simultaneously, has wasted network transmission resource.
And in the embodiment of the invention, the transmission number of times of TA MCE in a predetermined overtime duration equals predetermined overtime duration divided by the predetermined duration that sends, therefore, can be by increasing the predetermined transmission frequency that duration reduces TAMCE that sends, when reducing offered load, can reduce the uplink loss rate of false alarm by sending TA retrans MCE again.For example, when the predetermined overtime duration of timer was 500 milliseconds, it was 400 milliseconds that predetermined transmission duration is set, and the predetermined maximum times that sends TA retrans MCE is 2 times, then the base station is sent in the predetermined overtime duration and only sends 1.25 TA MCE, has reduced offered load.
Below, relevant device in the embodiment of the invention and system are elaborated.
See also Fig. 4, the base station embodiment comprises in the embodiment of the invention:
First sending module 410 is used for reaching predetermined when sending duration when timer, sends the time unifying unit of carrying very first time alignment value to user terminal;
Further, the base station in the present embodiment can also comprise:
Particularly, can guarantee that timer can not reach predetermined overtime duration by the predetermined maximum times that allows the transmitting time alignment retransmission element is set, at this moment, as shown in Figure 5, second judge module 440 can comprise:
First judging unit 441, be used to judge the affirmation message of in the described time unifying retransmission element of up-to-date transmission feedback on reservation duration, whether not receiving this time unifying retransmission element correspondence, if then trigger second judging unit 442 and carry out associative operation, otherwise trigger timer restart;
See also Fig. 6, user terminal embodiment comprises in the embodiment of the invention:
Sending module 630 is used for the affirmation message to base station transmission very first time alignment retransmission element correspondence.
Further, user terminal in the present embodiment can also comprise: adjusting module 640, be used for adjusting timer according to very first time alignment value, and trigger sending module 630 and carry out associative operation, at this moment, predetermined differ when duration in not receiving time unifying unit or time unifying retransmission element of judge module 620 before judging reception very first time alignment retransmission element triggered adjusting module 640 and carried out associative operations.
See also Fig. 7, communication system embodiment comprises in the embodiment of the invention:
In the present embodiment, after the time unifying unit of a TA value is carried in transmission in the base station,, then send the time unifying retransmission element of carrying a TA value to UE if in the feedback on reservation duration, do not receive acknowledge message; UE is after receiving the very first time alignment retransmission element of carrying a TA value, before receiving very first time alignment retransmission element, be scheduled to differ time of receipt (T of R) alignment unit in the duration if judge, then can determine, this time unifying unit is that the base station is with once obtaining with the TA value that very first time alignment retransmission element is carried, UE has adjusted timer according to this TA value, therefore, UE directly sends acknowledge message to the base station, thereby can reduce the generation that UE repeats to adjust timer and NODEB mistake reporting uplink step-out information phenomenon.
See also Fig. 8, another embodiment of communication system comprises in the embodiment of the invention:
Base station 810 is used for reaching predetermined when sending duration when first timer, sends the time unifying unit of carrying very first time alignment value to user terminal; Whether judgement receives this corresponding affirmation message of time unifying unit of user terminal feedback in sending time unifying unit feedback on reservation duration; If do not receive, then send the time unifying retransmission element of carrying very first time alignment value to user terminal; Otherwise triggering first timer restarts; If in up-to-date transmitting time alignment retransmission element feedback on reservation duration, do not receive the affirmation message of this time unifying retransmission element correspondence, and first timer does not reach predetermined overtime duration, then repeat the step that sends the time unifying retransmission element of carrying very first time alignment value to user terminal, restart otherwise trigger first timer;
User terminal 820 is used to receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends; Judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration; If then send the affirmation message of very first time alignment retransmission element correspondence, otherwise adjust second timer, and send the affirmation message of very first time alignment retransmission element correspondence to the base station according to very first time alignment value to the base station.
In the present embodiment, UE is after receiving the very first time alignment retransmission element of carrying a TA value, if judge the predetermined time of receipt (T of R) alignment unit or time unifying retransmission element that differs in the duration before receiving very first time alignment retransmission element, then can determine, predetermined time unifying unit and the time unifying retransmission element that receives in the duration that differ before receiving very first time alignment retransmission element, the TA value of carrying with very first time alignment retransmission element is that the base station is with once obtaining, UE has adjusted timer according to this TA value, therefore, UE directly sends acknowledge message to the base station, thereby can reduce the generation that UE repeats to adjust timer and NODEB mistake reporting uplink step-out information phenomenon.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of the foregoing description is to instruct relevant hardware to finish by program, this program can be stored in the computer-readable recording medium, storage medium can comprise: read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.
More than time alignment timer adjustment method that the embodiment of the invention provided and relevant device and system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a time alignment timer adjustment method is characterized in that, comprising:
When timer reaches predetermined when sending duration, send the time unifying unit of carrying very first time alignment value to user terminal;
Whether judgement receives the corresponding affirmation message of described time unifying unit of user terminal feedback in sending the first feedback on reservation duration of described time unifying;
If do not receive, then send the time unifying retransmission element of carrying very first time alignment value to user terminal.
2. according to the described method of claim 1, it is characterized in that, after user terminal sends the time unifying retransmission element of carrying very first time alignment value, also comprise described:
If in the described time unifying retransmission element of up-to-date transmission feedback on reservation duration, do not receive the affirmation message of this time unifying retransmission element correspondence, and described timer does not reach predetermined overtime duration, then repeat and describedly send the step of the time unifying retransmission element carry very first time alignment value, otherwise trigger described timer restart to user terminal.
3. according to the described method of claim 2, it is characterized in that, if the affirmation message of time of receipt (T of R) alignment retransmission element correspondence not, and described timer does not reach predetermined overtime duration, then repeat and describedly send the step of the time unifying retransmission element carry very first time alignment value, specifically comprise to user terminal:
If the affirmation message of time of receipt (T of R) alignment retransmission element correspondence does not judge then whether the number of times that sends described time unifying retransmission element reaches predetermined maximum times, if do not reach, then repeats the step that sends described time unifying retransmission element to user terminal.
4. a time alignment timer adjustment method is characterized in that, comprising:
Receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends;
Judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration;
If then send the affirmation message of very first time alignment retransmission element correspondence to the base station.
5. according to the described method of claim 4, it is characterized in that described method also comprises:
If judge that receiving very first time alignment retransmission element predetermined differing does not before receive time unifying unit and time unifying retransmission element in the duration, then adjust timer, and send the affirmation message of very first time alignment retransmission element correspondence to the base station according to very first time alignment value.
6. a base station is characterized in that, comprising:
First sending module is used for reaching predetermined when sending duration when timer, sends the time unifying unit of carrying very first time alignment value to user terminal;
First judge module is used to judge the corresponding affirmation message of described time unifying unit of whether receiving the user terminal feedback in sending the first feedback on reservation duration of described time unifying, if do not receive, then triggers second sending module execution associative operation;
Second sending module is used for sending the time unifying retransmission element of carrying very first time alignment value to user terminal.
7. according to the described base station of claim 6, it is characterized in that described base station also comprises:
Second judge module, be used to judge the affirmation message of in the described time unifying retransmission element of up-to-date transmission feedback on reservation duration, whether not receiving this time unifying retransmission element correspondence, and described timer does not reach predetermined overtime duration, if, then trigger second sending module and carry out associative operation, otherwise trigger described timer restart.
8. a user terminal is characterized in that, comprising:
Receiver module is used to receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends;
Judge module is used to judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration, if then trigger sending module and carry out associative operation;
Sending module is used for the affirmation message to base station transmission very first time alignment retransmission element correspondence.
9. described according to Claim 8 user terminal is characterized in that described user terminal also comprises: adjusting module is used for adjusting timer according to very first time alignment value, and triggers sending module and carry out associative operation;
Predetermined differ when duration in not receiving time unifying unit or time unifying retransmission element of judge module before judging reception very first time alignment retransmission element triggered adjusting module and carried out associative operation.
10. a communication system is characterized in that, comprising:
The base station is used for reaching predetermined when sending duration when timer, sends the time unifying unit of carrying very first time alignment value to user terminal; Whether judgement receives the corresponding affirmation message of described time unifying unit of user terminal feedback in sending the first feedback on reservation duration of described time unifying; If do not receive, then send the time unifying retransmission element of carrying very first time alignment value to user terminal;
User terminal is used to receive the very first time alignment retransmission element of carrying very first time alignment value that the base station sends; Judge receiving predetermined before the very first time alignment retransmission element differs whether receive time unifying unit or time unifying retransmission element in the duration; If then send the affirmation message of very first time alignment retransmission element correspondence to the base station.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010144671 CN101827439B (en) | 2010-04-09 | 2010-04-09 | Time alignment timer adjustment method, and related device and system |
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| CN 201010144671 CN101827439B (en) | 2010-04-09 | 2010-04-09 | Time alignment timer adjustment method, and related device and system |
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| CN101827439A true CN101827439A (en) | 2010-09-08 |
| CN101827439B CN101827439B (en) | 2013-01-16 |
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| CN 201010144671 Active CN101827439B (en) | 2010-04-09 | 2010-04-09 | Time alignment timer adjustment method, and related device and system |
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| CN102111257A (en) * | 2011-03-04 | 2011-06-29 | 中兴通讯股份有限公司 | Method and system for adjusting timing advance |
| WO2012136128A1 (en) * | 2011-04-02 | 2012-10-11 | 华为技术有限公司 | Method and device for acquiring secondary timing advance |
| WO2012167629A1 (en) * | 2011-06-10 | 2012-12-13 | 中兴通讯股份有限公司 | Processing method and device for terminal to maintain uplink synchronization in drx mode |
| CN103795464A (en) * | 2013-07-31 | 2014-05-14 | 深圳光启创新技术有限公司 | Error retransmission mechanism-contained visible optical signal sending method and apparatus and receiving method and apparatus, and system |
| WO2014101229A1 (en) * | 2012-12-31 | 2014-07-03 | 华为技术有限公司 | Data transmission method and base station |
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| CN112867137B (en) * | 2021-01-14 | 2022-08-19 | 江苏亨鑫众联通信技术有限公司 | Uplink synchronization method and device |
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