CN102957521A - DRX (discontinuous reception) downlink data transmission method and DRX downlink data transmission system for reducing co-existing interference in terminal, terminal and base station - Google Patents

DRX (discontinuous reception) downlink data transmission method and DRX downlink data transmission system for reducing co-existing interference in terminal, terminal and base station Download PDF

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Publication number
CN102957521A
CN102957521A CN2011102389716A CN201110238971A CN102957521A CN 102957521 A CN102957521 A CN 102957521A CN 2011102389716 A CN2011102389716 A CN 2011102389716A CN 201110238971 A CN201110238971 A CN 201110238971A CN 102957521 A CN102957521 A CN 102957521A
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terminal
base station
downlink data
time period
operation time
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CN102957521B (en
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江小威
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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Abstract

The invention provides a DRX (discontinuous reception) downlink data transmission method and a DRX downlink data transmission system for reducing co-existing interference in a terminal and further provides the terminal and a base station. The DRX downlink data transmission method includes that in an LTE (long term evolution) operation time, the base station transmits downlink data; the terminal receives the downlink data transmitted from the base station and computes transmission time for transmitting feedback information according to the received downlink data; by judging whether the transmission time is included in the LTE operation time or not, the terminal does not transmit feedback information to the base station if the transmission time is excluded from the LTE operation time, and transmits the feedback information to the base station if the transmission time is included in the LTE operation time. Since the terminal can avoid from transmitting the feedback information in non-LTE operation time, co-existing interference in the terminal as a result that the terminal transmits the feedback information in the non-LTE operation time is avoided.

Description

Reduce DRX downlink data transmission method, system, terminal and the base station of mutual interference in the terminal
Technical field
The application relates to a kind of DRX (Discontinuous Reception, discontinuous reception) downlink data transmission method, terminal, base station and system that reduces mutual interference in the terminal.
Background technology
Growing along with the intelligent terminal market scale, wireless communication module that can integrated multiple types in the increasing terminal when two wireless modules in the same equipment work in adjacent or close frequency range, will produce mutual interference.
For example, at LTE (Long Term Evolution, Long Term Evolution) in the system, terminal is except being integrated with the LTE module, all right integrated WiFi (WirelessFidelity, wireless compatibility authentication) module, bluetooth module, perhaps GPS (Global Positioning System, global positioning system) module.At this moment, just may produce mutual interference between LTE module and WiFi/ bluetooth/GPS module.
A kind of DRX (Discontinuous Reception, discontinuous reception) data transmission method is provided in the 3GPP TR36.816 technical report.In the method, transmit in time-multiplexed mode between LTE data and the WiFi/ bluetooth/gps data, thereby can reduce mutual interference.
According to the DRX data transmission method, a DRX cycle is divided into two time periods: LTE operation time period (LTE On-duration) and ISM (Industrial Scientific Medical) operation time period (Opportunity for ISM operations).Wherein, the LTE operation time period is corresponding to DRX active (enlivening) state, as the LTE data transfer.The ISM operation time period as non-LTE data transfer, for example, can be used as WiFi data, the transmission of blue-teeth data or gps data corresponding to DRX inactive (non-active) state.
Fig. 1 shows the sequential chart of DRX downlink data transmission method of the prior art.As shown in the figure, base station eNB will send the LTE downlink data to terminal UE in the LTE operation time period.Terminal will send feedback information ACK (affirmation)/NACK (unconfirmed) according to the downlink data that receives.For example, when terminal correctly receives downlink data, send ACK information as feedback information; Otherwise, send nack message as feedback information.Data re-transmission will be carried out after receiving nack message in the base station,, retransmit the downlink data that sent last time that is.
When the LTE operation time period finished, terminal judged whether the not yet downlink retransmitted data of reception according to feedback information.If no, then terminal will transfer DRX inactive state to from DRX active state,, enter the ISM operation time period from the LTE operation time period that is.If the downlink retransmitted data that not yet receives is arranged, for example last feedback information is nack message, and terminal will be calculated DRX and retransmit the time, begin to intercept PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) data are to receive data retransmission.If the reception of data retransmission is failure still, terminal will send the NACK feedback information again, and again calculate the DRX re-transmission time, until reach maximum retransmission.
Yet there is following problem in existing DRX downlink data transmission method:
1) terminal may receive downlink retransmitted data from the base station in the ISM operation time period.When LTE operation time period proportion is LTE FDD band (frequency range) 7/13/14, receive the LTE data in the ISM operation time period and can't cause mutual interference, but when LTE operation time period proportion is LTE TDD band (frequency range) 40, receives the LTE data in the ISM operation time period and will cause mutual interference in the terminal.
2) terminal may send the LTE feedback information in the ISM operation time period.No matter the frequency that adopts of LTE operation time period is LTE FDD band 7/13/14, or LTE TDD band 40 sends the LTE feedback information in the ISM operation time period and all can cause mutual interference in the terminal.
For reducing mutual interference, can reserve certain non-scheduled time in the LTE operation time period.For example, can be before the LTE operation time period finishes 4ms (FDD situation) or 6-13ms (TDD situation) just stop the new biography downlink data.But, reserve the non-scheduled time will bring loss of throughput.
Summary of the invention
The application's purpose provides a kind of DRX downlink data transmission method, system, terminal and the base station that can partly improve at least the interior mutual interference of reduction terminal of above-mentioned defective of the prior art.
According to the application's a aspect, a kind of DRX downlink data transmission method that reduces mutual interference in the terminal is disclosed, comprising: in the LTE operation time period, the base station sends downlink data; After terminal receives downlink data from described base station, calculating sends the transmitting time of feedback information according to received downlink data, judge whether described transmitting time falls into the LTE operation time period, if described transmitting time does not fall into the LTE operation time period, then described terminal does not send feedback information to described base station; And if described transmitting time falls into the LTE operation time period, then described terminal sends feedback information to described base station.
According to another aspect of the application, a kind of system that realizes reducing the DRX downlink data transmission method of mutual interference in the terminal is disclosed, comprising: terminal and base station, described base station sends downlink data in the LTE operation time period; After described terminal receives downlink data from the base station, calculating sends the transmitting time of feedback information according to received downlink data, judge whether described transmitting time falls into the LTE operation time period, if described transmitting time does not fall into the LTE operation time period, then described terminal does not send feedback information to described base station, if described transmitting time falls into the LTE operation time period, then described terminal sends feedback information to described base station; The downlink data transmission operation is carried out according to the feedback information of receiving in described base station.
Another aspect according to the application, disclose a kind of terminal that realizes reducing the DRX downlink data transmission method of mutual interference in the terminal, having comprised: receiver module, computing module, judge module and sending module, described receiver module receives the downlink data from the base station; Described computing module calculates described terminal sends feedback information to the base station according to received downlink data transmitting time; Described judge module judges whether described transmitting time falls into the LTE operation time period, if fall into the LTE operation time period, then described judge module indicates described sending module to send feedback information to described base station; If the transmitting time of described feedback information does not fall into the LTE operation time period, then described judge module indicates described sending module not send feedback information to described base station; Described sending module sends feedback information according to the indication that receives from described judge module to the base station.
According to another aspect of the application, a kind of base station of realizing reducing the DRX downlink data transmission method of mutual interference in the terminal is disclosed, further comprise: sending module, receiver module, judge module, computing module, described sending module sends downlink data in the LTE operation time period; Described receiver module is from the terminal receiving feedback information; Described judge module judges whether the feedback information that receives is nack message, if nack message, then judge module sends to described computing module and calculates indication; Described computing module calculates the re-transmission time that will retransmit downlink data according to the calculating indication that receives; Described judge module further judges whether the described re-transmission time fall into described LTE operation time period, if fall into, described judge module indicates described sending module to described terminal transmission data retransmission; Otherwise described judge module determines whether to indicate described sending module to send data retransmission to described terminal according to the current LTE frequency range that adopts.
Description of drawings
Fig. 1 shows DRX downlink data transmission method sequential chart of the prior art;
Fig. 2 a shows the flow chart according to the DRX downlink data transmission method of a kind of execution mode of the application, and Fig. 2 b shows the sequential chart according to the DRX downlink data transmission method of a kind of execution mode of the application;
Fig. 3 shows the DRX downlink data transmission method flow chart according to the application's another kind of execution mode; And
Fig. 4 shows the block diagram according to the system of a kind of execution mode of the application.
Embodiment
With reference to the accompanying drawings the disclosed DRX downlink data transmission method of the application, system, terminal and base station are elaborated.For simplicity's sake, in the explanation of each embodiment of the application, same or similar device has used same or analogous Reference numeral.
Fig. 2 a shows the DRX downlink data transmission method flow chart according to a kind of execution mode of the application, and Fig. 2 b further shows the sequential chart of the DRX downlink data transmission method in this execution mode.According to present embodiment, in the step 201, in the LTE operation time period, the base station sends downlink data.In step 202, after terminal receives downlink data from the base station, calculate the transmitting time that sends feedback information ACK/NACK according to received downlink data.In step 203, whether the terminal judges transmitting time falls into the LTE operation time period.If transmitting time does not fall into the LTE operation time period, for example this transmitting time has fallen into the ISM operation time period, and then in step 204, terminal does not send feedback information to the base station.If transmitting time falls into the LTE operation time period, then in step 205, terminal sends feedback information to the base station.
Like this, because terminal can be avoided sending feedback information in non-LTE operation time period, therefore avoided terminal to cause mutual interference in the terminal because sending feedback information in non-LTE operation time period (for example ISM operation time period).In addition, need not to reserve the non-scheduled time according to the application's DRX downlink data transmission method, so that base station and terminal can take full advantage of system resource.
Fig. 3 shows the DRX downlink data transmission method flow chart according to the application's another kind of execution mode.As shown in the figure, in the step 301, in the LTE operation time period, the base station sends downlink data.In step 302, after terminal receives downlink data from the base station, calculate the transmitting time that sends feedback information ACK/NACK according to received downlink data.In step 303, whether the terminal judges transmitting time falls into the LTE operation time period.If transmitting time does not fall into the LTE operation time period, for example this transmitting time has fallen into the ISM operation time period, and then in step 304, terminal does not send feedback information to the base station.
If transmitting time falls into the LTE operation time period, then in step 305, the base station judges whether the feedback information that receives from terminal is nack message.If the feedback information that the base station receives from terminal is not nack message, that is, receive the ACK feedback information after, in step 306, the operation of new biography data can be carried out in the base station.Because the concrete operations mode that the base station receives after the ACK information is same as the prior art, does not repeat them here.
If the base station is nack message from the feedback information that terminal receives, in step 307, the re-transmission time that retransmits downlink data is calculated in the base station.
In step 308, the base station judges whether the re-transmission time falls into the LTE operation time period.
If the re-transmission time falls into the LTE operation time period, then in step 309, the base station sends data retransmission to terminal.If the re-transmission time does not fall into the LTE operation time period, then in step 310, the base station determines whether to send data retransmission to terminal according to the current LTE frequency range that adopts.
According to a kind of embodiment, if the current LTE frequency range that adopts is LTE TDD band40, the base station will not send data retransmission to terminal.Like this, can avoid receiving mutual interference in the terminal that the LTE data cause in non-LTE operation time period (for example, in the ISM operation time period).In addition, if the current LTE frequency range that adopts is LTE TDD band 40, because the base station will can not send data retransmission to terminal in non-LTE operation time period, terminal can only be carried out data interception in the LTE operation time period, does not carry out data interception in non-LTE operation time period.
According to a kind of embodiment, if the current LTE frequency range that adopts is LTE FDD band7/13/14, because the LTE data that receive this frequency range in the ISM operation time period can not cause the mutual interference in the terminal, so will send at least one times data retransmission to terminal according to the base station of the present embodiment.Terminal can correspondingly receive at the time of reception of data retransmission at least one times data retransmission that the base station sends.According to a kind of embodiment, if after terminal correctly receives a data retransmission in the described at least one times data retransmission, with other data retransmission that no longer receives in the described at least one times data retransmission.Terminal can when twice re-transmission time arrives, receive data retransmission.Alternatively, terminal can when the re-transmission time first time arrives, receive for the first time data retransmission.If can correctly receive, then when the second time, data retransmission arrived, terminal can select not receive this time data retransmission.If terminal can not correctly receive for the first time data retransmission, then when the second time, data retransmission arrived, terminal will receive this of data retransmission second time.But for fear of sending the mutual interference that feedback information causes in the ISM operation time period, will can the data retransmission that receive in the ISM operation time period not fed back according to the terminal of the present embodiment.
In addition, receive the accuracy of downlink data in order to improve terminal, can when next LTE operation time period begins, judge whether to exist the incorrect downlink data that receives, need to determine whether the executing data retransmit operation.
According to a kind of execution mode, when next LTE operation time period began, terminal can be determined the current incorrect downlink data that receives that whether exists.If exist, terminal will send nack message as feedback information to the base station, the downlink data that the current existence of informing base station does not correctly receive.The base station will retransmit the downlink data that terminal does not correctly receive according to the nack message that receives.Otherwise, the downlink data that if there is no correctly receives, then terminal will send ACK information as feedback information to the base station, and the base station is according to the ACK information and executing new biography operation that receives.For example, the base station can send new data to terminal according to the ACK information that receives.
According to a kind of execution mode, when next LTE operation time period began, the base station can judge whether terminal exists the incorrect downlink data that receives according to channel quality.For example, when channel quality was better, for example correctly downlink data receiving of terminal can be judged in channel quality indicator CQI>15 o'clock,, did not have the correct downlink data that receives that is.If bad channel quality is then judged correctly downlink data receiving, that is, there is the incorrect downlink data that receives.If judge to exist, the base station will retransmit the downlink data that terminal does not correctly receive to terminal.If there is not the correct downlink data that receives in base station judgement terminal, the new biography operation will be carried out in the base station.
Fig. 4 shows the block diagram according to the system 1000 of a kind of execution mode of the application.As shown in the figure, system 1000 comprises terminal 400 and base station 500.According to present embodiment, in the LTE operation time period, base station 500 sends downlink data.After terminal 400 receives downlink data from base station 500, calculate the transmitting time that sends feedback information ACK/NACK according to received downlink data.Terminal 400 judges whether this transmitting time falls into the LTE operation time period.If transmitting time does not fall into the LTE operation time period, for example this transmitting time has fallen into the ISM operation time period, and terminal 400 is the 500 transmission feedback informations to the base station not.If transmitting time falls into the LTE operation time period, terminal 400 is 500 transmission feedback informations to the base station.
Like this, avoided terminal to send feedback information in non-LTE operation time period (for example ISM operation time period), and mutual interference in the terminal that causes.In addition, owing to need not to reserve the non-scheduled time, so that terminal 400 and base station 500 can take full advantage of system resource.
According to a kind of execution mode, when the feedback information that receives from terminal 400 when base station 500 was ACK information, the new biography operation was carried out in base station 500; When the feedback information that receives from terminal when base station 500 is nack message, the re-transmission time that retransmits downlink data is calculated in base station 500, judge whether the re-transmission time fall into the LTE operation time period, if the re-transmission time falls into the LTE operation time period, then base station 500 sends data retransmissions to terminal 400; If the re-transmission time does not fall into the LTE operation time period, then base station 500 determines whether to send data retransmission to terminal 400 according to the current LTE frequency range that adopts.
According to a kind of execution mode of the application, terminal 400 may further include receiver module 410, computing module 420, judge module 430 and sending module 440.
The downlink data that receiver module 410 receives from the base station.Computing module 420 computing terminals send the transmitting time of feedback information, that is, terminal will send according to received downlink data the transmitting time of feedback information to the base station.Judge module 430 judges whether the transmitting time that calculates falls into the LTE operation time period.If fall into the LTE operation time period, then judge module 430 indication sending modules 440 send feedback information to the base station, or ACK information nack message for example.If the transmitting time of feedback information falls into non-LTE operation time period, then judge module 430 indication sending modules 440 do not send feedback information to the base station.Sending module 440 can correspondingly send feedback information according to the indication that receives from judge module 430.
According to a kind of embodiment, when judge module 430 determined that the current LTE frequency range that adopts is TDD band 40, judge module 430 indication receiver modules 410 only carried out data interception in the LTE operation time period, do not carry out data interception in non-LTE operation time period.
According to another kind of embodiment, when judge module 430 determined that the current LTE frequency range that adopts is FDD band 7/13/14, judge module 430 indication receiver modules 410 correspondingly received the data retransmission that base station 500 sends at the time of reception of data retransmission.
According to a kind of embodiment, when next LTE operation time period begins, judge module 430 determines whether current terminals 400 exist the correct downlink data that receives, if exist, judge module 430 indication sending modules 440 500 send nack messages as feedback information to the base station; Otherwise judge module 430 indication sending modules 440 500 send the ACK information as feedback information to the base station.
According to a kind of execution mode of the application, base station 500 may further include receiver module 510, computing module 520, judge module 530 and sending module 540.
Sending module 540 sends downlink data in the LTE operation time period.Receiver module 510 is from terminal 400 receiving feedback informations.Judge module 530 judges whether the feedback information that receives is nack message, if nack message, then judge module 530 sends to computing module and calculates indication.Computing module 520 calculates the re-transmission time that will retransmit downlink data according to the calculating indication that receives.Judge module 530 further judges whether the re-transmission time falls into the LTE operation time period.If fall into, judge module 530 indication sending modules 540 send data retransmission to terminal 400.Otherwise judge module 530 determines whether to indicate sending module 540 to send data retransmission to terminal 400 according to the current LTE frequency range that adopts.
According to a kind of embodiment, when judge module 530 determined that the current LTE frequency range that adopts is TDD band 40, judge module 530 indication sending modules 540 did not send data retransmission to terminal.
According to a kind of embodiment, when judge module 530 determined that the current LTE frequency range that adopts is FDD band7/13/14, judge module 530 indication sending modules 540 sent at least one times data retransmission to terminal.
According to a kind of embodiment, when next LTE operation time period began, receiver module 510 was from terminal 400 receiving feedback informations, and when feedback information was nack message, judge module 530 indication sending modules 540 retransmitted downlink data; When feedback information was ACK information, judge module 530 was carried out the new biography operation.
According to a kind of embodiment, when next LTE operation time period begins, judge module 530 judges according to channel quality whether terminal exists the incorrect downlink data that receives, if judge to exist, judge module 530 indication sending modules 540 retransmit the downlink data that terminal does not correctly receive to terminal 400; Otherwise judge module 530 is carried out the new biography operation.
Abovely be described with reference to the exemplary embodiment of accompanying drawing to the application.Those skilled in the art should understand that; above-mentioned embodiment only is the example of lifting for illustrative purposes; rather than be used for limiting; all in the application instruction and the claim protection range under do any modification, be equal to replacement etc., all should be included in the claimed scope of the application.

Claims (20)

1. DRX downlink data transmission method that reduces mutual interference in the terminal comprises:
In the LTE operation time period, the base station sends downlink data;
After terminal receives downlink data from described base station, calculate the transmitting time that sends feedback information according to received downlink data, judge whether described transmitting time falls into the LTE operation time period,
If described transmitting time does not fall into the LTE operation time period, then described terminal does not send feedback information to described base station; And
If described transmitting time falls into the LTE operation time period, then described terminal sends feedback information to described base station.
2. method according to claim 1 further comprises:
When the feedback information that receives from terminal when the base station was nack message, the re-transmission time that retransmits downlink data was calculated in described base station, judged whether the described re-transmission time fall into described LTE operation time period,
If the described re-transmission time falls into the LTE operation time period, then described base station sends data retransmission to described terminal; And
If the described re-transmission time does not fall into the LTE operation time period, then described base station determines whether to send data retransmission to described terminal according to the current LTE frequency range that adopts.
3. method according to claim 2, wherein, described base station determines whether that according to the current LTE frequency range that adopts the step that sends data retransmission to described terminal further comprises: if the current LTE frequency range that adopts is frequency range 40, described base station does not send data retransmission to described terminal.
4. method according to claim 3, further comprise: if the current LTE frequency range that adopts is frequency range 40, terminal is only carried out data interception in the LTE operation time period, does not carry out data interception in non-LTE operation time period.
5. method according to claim 2, wherein, described base station determines whether that according to the current LTE frequency range that adopts the step that sends data retransmission to described terminal further comprises: if the current LTE frequency range that adopts is frequency range 7/13/14, described base station sends at least one times data retransmission to described terminal.
6. method according to claim 5, further comprise: if the current LTE frequency range that adopts is frequency range 7/13/14, terminal correspondingly receives at least one times data retransmission that the base station sends at the time of reception of data retransmission.
7. method according to claim 6, wherein, described terminal comprises in the step that the time of reception of data retransmission correspondingly receives at least one times data retransmission that the base station sends: if after terminal correctly receives a data retransmission in the described at least one times data retransmission, with other data retransmission that no longer receives in the described at least one times data retransmission.
8. each described method according to claim 1-7 further comprises:
When next LTE operation time period began, described terminal was determined the current incorrect downlink data that receives that whether exists,
If exist, described terminal sends nack message as feedback information to described base station, and described base station retransmits the downlink data that described terminal does not correctly receive according to the nack message that receives;
Otherwise described terminal sends ACK information as feedback information to described base station, and described base station is according to the ACK information and executing new biography operation that receives.
9. each described method according to claim 1-7 further comprises:
When next LTE operation time period began, described base station judged according to channel quality whether terminal exists the incorrect downlink data that receives,
If judge to exist, described base station retransmits the downlink data that described terminal does not correctly receive to terminal;
Otherwise the new biography operation is carried out in described base station.
10. system that realizes reducing the DRX downlink data transmission method of mutual interference in the terminal comprises: terminal and base station,
Described base station sends downlink data in the LTE operation time period;
After described terminal receives downlink data from the base station, calculate the transmitting time that sends feedback information according to received downlink data, judge whether described transmitting time falls into the LTE operation time period,
If described transmitting time does not fall into the LTE operation time period, then described terminal does not send feedback information to described base station;
If described transmitting time falls into the LTE operation time period, then described terminal sends feedback information to described base station,
The downlink data transmission operation is carried out according to the feedback information of receiving in described base station.
11. system according to claim 10, wherein, when the feedback information that receives from terminal when the base station was ACK information, the new biography operation was carried out in described base station; When the feedback information that receives from terminal when the base station is nack message, the re-transmission time that retransmits downlink data is calculated in described base station, judge whether the described re-transmission time falls into described LTE operation time period, if the described re-transmission time falls into the LTE operation time period, then described base station sends data retransmission to described terminal; If the described re-transmission time does not fall into the LTE operation time period, then described base station determines whether to send data retransmission to described terminal according to the current LTE frequency range that adopts.
12. a terminal that realizes reducing the DRX downlink data transmission method of mutual interference in the terminal comprises: receiver module, computing module, judge module and sending module,
Described receiver module receives the downlink data from the base station;
Described computing module calculates described terminal sends feedback information to the base station according to received downlink data transmitting time;
Described judge module judges whether described transmitting time falls into the LTE operation time period, if fall into the LTE operation time period, then described judge module indicates described sending module to send feedback information to described base station; If the transmitting time of described feedback information does not fall into the LTE operation time period, then described judge module indicates described sending module not send feedback information to described base station;
Described sending module sends feedback information according to the indication that receives from described judge module to the base station.
13. terminal according to claim 12, wherein, when described judge module determined that the current LTE frequency range that adopts is frequency range 40, described judge module indicated described receiver module only to carry out data interception in the LTE operation time period, does not carry out data interception in non-LTE operation time period.
14. terminal according to claim 12, wherein, when described judge module determined that the current LTE frequency range that adopts is frequency range 7/13/14, described judge module indicated described receiver module correspondingly to receive the data retransmission that the base station sends at the time of reception of data retransmission.
15. terminal according to claim 12, wherein, when next LTE operation time period begins, described judge module determines whether current terminal exists the incorrect downlink data that receives, if exist, described judge module indicates described sending module to send nack message as feedback information to described base station; Otherwise described judge module indicates described sending module to send ACK information as feedback information to described base station.
16. a base station of realizing reducing the DRX downlink data transmission method of mutual interference in the terminal further comprises: sending module, receiver module, judge module, computing module,
Described sending module sends downlink data in the LTE operation time period;
Described receiver module is from the terminal receiving feedback information;
Described judge module judges whether the feedback information that receives is nack message, if nack message, then judge module sends to described computing module and calculates indication;
Described computing module calculates the re-transmission time that will retransmit downlink data according to the calculating indication that receives;
Described judge module further judges whether the described re-transmission time fall into described LTE operation time period,
If fall into, described judge module indicates described sending module to send data retransmission to described terminal;
Otherwise described judge module determines whether to indicate described sending module to send data retransmission to described terminal according to the current LTE frequency range that adopts.
17. base station according to claim 16, wherein, when described judge module determined that the current LTE frequency range that adopts is frequency range 40, described judge module indicated described sending module not send data retransmission to described terminal.
18. base station according to claim 16, wherein, when described judge module determined that the current LTE frequency range that adopts is frequency range 7/13/14, described judge module indicated described sending module to send at least one times data retransmission to described terminal.
19. base station according to claim 16, when next LTE operation time period began, described receiver module was from described terminal receiving feedback information, and when feedback information was nack message, described judge module indicated described sending module to retransmit downlink data; When feedback information was ACK information, described judge module was carried out the new biography operation.
20. base station according to claim 16, when next LTE operation time period begins, described judge module judges according to channel quality whether terminal exists the incorrect downlink data that receives, if judge to exist, described judge module indicates described sending module to retransmit the downlink data that described terminal does not correctly receive to terminal; Otherwise described judge module is carried out the new biography operation.
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CN105407490A (en) * 2014-09-16 2016-03-16 上海无线通信研究中心 Implement method and system to allow different communication systems to coexist in license-free frequency band
WO2022121908A1 (en) * 2020-12-10 2022-06-16 维沃移动通信有限公司 Data receiving method and apparatus, and terminal and readable storage medium
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