CN102149132A - Method, base station and terminal for retransmitting data - Google Patents
Method, base station and terminal for retransmitting data Download PDFInfo
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- CN102149132A CN102149132A CN2010101137145A CN201010113714A CN102149132A CN 102149132 A CN102149132 A CN 102149132A CN 2010101137145 A CN2010101137145 A CN 2010101137145A CN 201010113714 A CN201010113714 A CN 201010113714A CN 102149132 A CN102149132 A CN 102149132A
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- 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
Abstract
The invention discloses a method, base station and terminal for retransmitting data. The method comprises the following steps: transmitting a first data stream to a terminal; receiving a first feedback message returned by the terminal, wherein the first feedback message carries first retransmission power required for correctly decoding the first data stream by the terminal; and when the first retransmission power is less than downlink full power and is provided with a second data stream which is required to be sent to the terminal, retransmitting the first data stream to the terminal by the first retransmission power and transmitting the second data stream to the terminal by the surplus power of the downlink full power relative to the first retransmission power. According to the invention, the transmission efficiency of the data is improved, and the power resources are saved.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of data repeating method, base station and terminal.
Background technology
In wireless communication system,, reduced reliability of data transmission in the wireless system because there are time-varying characteristics such as decline and multipath in wireless channel.For improving reliability of data transmission, introduce the data retransmission mechanism in the wireless communication system, be used for data retransmission under the situation that transfer of data is made mistakes.
Comprise in the existing data re-transmission mechanism and mix automatic repeat requests (HARQ, Hybrid AutomaticRepeat Request) mechanism, mixed automatic retransmission request method mainly comprises: the base station sends packet to terminal, and this packet of buffer memory; The base station is that (ACK Acknowledge) during message, then continues to send remaining packet to terminal in positive acknowledgement at the feedback message that receives; The feedback message that receives in the base station is a negative acknowledgement message, then to the terminal re-sends cached data packet, till the positive confirmation message that receives the terminal transmission.
The inventor finds in the process of research prior art, existing mixed automatic retransmission request method is sending with total power when terminal retransmits cached data packet, cause the gross power of the packet that terminal receives to surpass the required power of decoding, caused the power resource waste.
Summary of the invention
The invention provides a kind of data repeating method, base station and terminal, when terminal sends retransmission data packet may, improve the power resource utilance in the base station.
The data repeating method that the embodiment of the invention provides comprises:
Send first data flow to terminal;
Receive first feedback message that described terminal is returned, carried terminal is correctly decoded the first required re-transmission power of described first data flow in described first feedback message;
Retransmit power less than descending total power and exist need be to second data flow that terminal sends the time described first, retransmit power with described first and retransmit described first data flow of transmission, send described second data flow with respect to first dump power that retransmits power to described terminal with described descending total power to described terminal.
The embodiment of the invention also provides another data repeating method, comprising:
Receive first data flow that the base station sends, described first data flow is decoded;
When described first traffic error of decoding, obtain the Signal to Interference plus Noise Ratio S1 of first data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described first data flow;
Calculate the first required re-transmission power of described first data flow of re-transmission according to described S1 and S2;
Send first feedback message to described base station, carry described first in described first feedback message and retransmit power;
Receive the base station and retransmit first data flow and second data flow that sends;
Second data flow that receives is decoded, first data flow that receives for the first time and base station are retransmitted first data flow that sends merge decoding.
The embodiment of the invention also provides a kind of base station, comprising:
The data flow transmitting element is used for sending first data flow to terminal;
The message sink unit is used to receive first feedback message that described terminal is returned, and carried terminal is correctly decoded the first required re-transmission power of described first data flow in described first feedback message;
Described data flow transmitting element also is used for retransmitting power less than descending total power and exist need be to second data flow that terminal sends the time described first, retransmit power with described first and retransmit transmission first data flow, send second data flow with respect to first dump power that retransmits power to described terminal with described descending total power to described terminal.
The embodiment of the invention also provides a kind of terminal, comprising:
The data flow receiving element is used to receive first data flow that the base station sends;
The data flow decoding unit is used for described first data flow is decoded;
First acquiring unit is used for obtaining the Signal to Interference plus Noise Ratio S1 of first data flow that receives and being correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described first data flow when described first traffic error of decoding;
First computing unit is used for calculating the first required re-transmission power of described first data flow of re-transmission according to described S1 and S2;
Message sending unit is used for sending first feedback message to described base station, carries described first in described first feedback message and retransmits power;
Described data flow receiving element also is used to receive the base station and retransmits first data flow and second data flow that sends;
Described data flow decoding unit also is used for second data flow that receives is decoded, and first data flow that receives for the first time and base station is retransmitted first data flow that sends merge decoding.
In embodiments of the present invention, first of terminal feedback retransmit power less than descending flat-out situation under, total power is used for sending second data flow to terminal with respect to first dump power that retransmits power, thereby send first data flow and second data flow to terminal with descending total power, improve the efficiency of transmission of data, saved power resource.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the data repeating method that provides of the embodiment of the invention one;
Fig. 2 is the flow chart of the data repeating method that provides of the embodiment of the invention two;
Fig. 3 is the flow chart of the data repeating method that provides of the embodiment of the invention three;
Fig. 4 is the flow chart of the data repeating method that provides of the embodiment of the invention four;
Fig. 5 is the flow chart of the data repeating method that provides of the embodiment of the invention five;
Fig. 6 is the application scenarios figure of the data repeating method that provides of the embodiment of the invention six;
Fig. 7 is the structural representation of the base station that provides of the embodiment of the invention seven;
Fig. 8 is the structural representation of the terminal that provides of the embodiment of the invention eight.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme of data repeating method, base station and the terminal that the embodiment of the invention is provided is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 1, Fig. 1 is the flow chart of the data repeating method that provides of the embodiment of the invention one.
The data repeating method that the embodiment of the invention provides can comprise:
A1, send first data flow to terminal.
In embodiments of the present invention, the base station can obtain first data flow that need send to terminal, and sends first data flow by transmission block (TB, Transport Block) to terminal.Terminal will be returned first feedback message after receiving first data flow.
First feedback message that A2, receiving terminal return, carried terminal is correctly decoded the first required re-transmission power of first data flow in first feedback message.
Concrete, first feedback message that the base station receiving terminal returns in the embodiment of the invention, carried terminal is correctly decoded the first required re-transmission power of first data flow in first feedback message.
A3, retransmit power less than descending total power first, and existing need be when second data flow that terminal sends, retransmit power with first and retransmit transmission first data flow, send second data flow with respect to first dump power that retransmits power to terminal with descending total power to terminal.
Concrete, the base station is when first retransmits power less than descending total power and exist need be when second data flow that terminal sends in the embodiment of the invention, retransmit power by transmission block with first and retransmit transmission first data flow to terminal, send second data flow with respect to first dump power that retransmits power to terminal with descending total power, first data flow with second distribution of flows identical transmission block.
In embodiments of the present invention, first of terminal feedback retransmit power less than descending flat-out situation under, total power is used for sending second data flow to terminal with respect to first dump power that retransmits power, thereby retransmit transmission first data flow and second data flow to terminal with descending total power, improve the efficiency of transmission of data, saved power resource.
In embodiments of the present invention, the base station can be when first retransmits power more than or equal to descending total power, retransmit transmission first data flow with descending total power to terminal, thereby make the decoding power of first data flow that terminal receives meet the demands, realize first data flow is correctly decoded.
Referring to Fig. 2, Fig. 2 is the flow chart of the data repeating method that provides of the embodiment of the invention two
In embodiments of the present invention, the base station need send first data flow to terminal, and the base station obtains first data flow that need send to terminal in the embodiment of the invention, and first data flow is dispatched coding.The data repeating method that the embodiment of the invention provides mainly comprises:
B1, send first data flow to terminal with descending total power.
In embodiments of the present invention, the base station sends first data flow with descending total power to terminal by transmission block.Terminal will be returned first feedback message after receiving first data flow.
It is to be noted, it only is a kind of preferred implementation that the base station sends first data flow with descending total power to terminal, the base station can also send first data flow and second data flow to terminal with descending total power, perhaps sends data flow more than two with descending total power to terminal.
First feedback message that B2, receiving terminal return, carried terminal is correctly decoded the first required re-transmission power of first data flow in first feedback message.
Concrete, first feedback message that the base station receiving terminal returns in the embodiment of the invention, carried terminal is correctly decoded the first required re-transmission power of first data flow in first feedback message.
B3, retransmit power less than descending total power and exist need be to second data flow that terminal sends the time first, retransmit power with first and retransmit transmission first data flow, send second data flow with respect to first dump power that retransmits power to terminal with descending total power to terminal.
Concrete, the base station is when first retransmits power less than descending total power and exist need be when second data flow that terminal sends in the embodiment of the invention, retransmit power by transmission block with first and retransmit transmission first data flow to terminal, send second data flow with respect to first dump power that retransmits power to terminal with descending total power, first data flow with second distribution of flows identical transmission block.
In embodiments of the present invention, first of terminal feedback retransmit power less than descending flat-out situation under, total power is used for sending second data flow to terminal with respect to first dump power that retransmits power, thereby retransmit transmission first data flow and second data flow to terminal with descending total power, improve the efficiency of transmission of data, saved power resource.
In embodiments of the present invention, base station scheduling need be to first data flow and second data flow of terminal transmission, and the modulating-coding speed of the second data flow correspondence that scheduling obtains is less than the modulating-coding speed of the described first data flow correspondence, and then make descending total power can satisfy the demand that sends second data flow with respect to first dump power that retransmits power as far as possible, reduce the number of transmissions of second data flow, improve data transmission efficiency.
In embodiments of the present invention, the base station can use mutually orthogonal orthogonal intersection to carry out spread spectrum respectively to first data flow and second data flow, use first data flow and second data flow of mode after terminal sends spread spectrum of code division multiplexing, first data flow this moment orthogonal intersection corresponding different respectively with second data flow.Certainly the base station can also adopt other multiplex mode to send first data flow and second data flow.With respect to other multiplex mode, code division multiplexing can reduce the interference between first data flow and second data flow, reduces the data probability of errors.
Referring to Fig. 3, Fig. 3 is the flow chart of the data repeating method that provides of the embodiment of the invention two.
The data repeating method that provides in the embodiment of the invention two can comprise:
C1, send first data flow to terminal.
First feedback message that C2, receiving terminal return, carried terminal is correctly decoded the first required re-transmission power of first data flow in first feedback message.
C3, retransmit power less than descending total power and exist need be to second data flow that terminal sends the time first, retransmit power with first and retransmit transmission first data flow, send second data flow with respect to first dump power that retransmits power to terminal with descending total power to terminal.
Wherein, the implementation of step C1-C3 is identical with above-mentioned steps A1-A3, no longer is repeated in this description at this.
Terminal receives and decode first data flow and second data flow, returns second feedback message to the base station.
Second feedback message that C4, receiving terminal return, carried terminal is correctly decoded the second required re-transmission power of second data flow in second feedback message.
Concrete, second feedback message that the base station receiving terminal returns, carried terminal is correctly decoded the second required re-transmission power of second data flow and is correctly decoded the required retransmission power of first data flow in second feedback message, and be correctly decoded the required re-transmission power of first data flow this moment is 0.
C5, whether judging second, to retransmit power be zero.
Concrete, the base station can judge that second retransmits whether power is 0 in the embodiment of the invention, if, illustrate that then second data flow sends successfully, finish this data re-transmission process.
If the second re-transmission power is not 0, then execution in step B7.
C6, judge whether to exist the 3rd data flow that need send to terminal.
Concrete, the base station is not 0 o'clock at the second re-transmission power in the embodiment of the invention, further judging whether to exist need be to the 3rd data flow of this terminal transmission.If, execution in step C7 then, otherwise execution in step C8.
C7, if there is the 3rd data flow, then retransmit power and retransmit to terminal and send second data flow with second, send three data flow with respect to second dump power that retransmits power to terminal with descending total power.
Concrete, the base station judge to exist need be to the 3rd data flow that terminal sends the time, obtaining need be to the 3rd data flow of terminal transmission, retransmit power by transmission block with second and retransmit transmission second data flow, send the 3rd data flow with respect to second dump power that retransmits power to terminal with descending total power to terminal.
In embodiments of the present invention, the base station is retransmitting the dump power of power with descending total power after terminal sends the 3rd data flow with respect to second, can also receive the feedback message that terminal is returned, can carry in the feedback message and retransmit the required power of the 3rd data flow, if it is non-vanishing to retransmit the required power of the 3rd data flow, then retransmit the 3rd data flow with descending total power.
C8, if there is not the 3rd data flow, then retransmit to terminal and send second data flow with descending total power.
Concrete, the base station then retransmits to terminal with descending total power by transmission block and sends second data flow, and finish this data re-transmission process when not having the 3rd data flow.
In the data repeating method that the embodiment of the invention provides, the base station according to carry in second feedback message that receives second to retransmit power non-vanishing and when having the 3rd data flow, retransmit transmission second data flow and the 3rd data flow with descending total power to terminal, improve the efficiency of transmission of data, saved power resource.
Referring to Fig. 4, Fig. 4 is the flow chart of the data repeating method that provides of the embodiment of the invention four.
The embodiment of the invention is come the data of description repeating method from end side, and data repeating method mainly comprises:
First data flow that D1, reception base station send is decoded to first data flow.
Concrete, terminal can receive the transmission block that the base station sends in the embodiment of the invention, comprises first data flow in the transmission block, and first data flow that end-on is received is decoded.
D2, during first traffic error, obtain the Signal to Interference plus Noise Ratio S1 of first data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of first data flow in decoding.
Concrete, the terminal in the embodiment of the invention can be when decoding first traffic error, first data flow that buffer memory receives, and obtain the Signal to Interference plus Noise Ratio S1 of first data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of first data flow.Wherein, terminal can according to the coded system of first data flow inquire about coded system and be correctly decoded data flow and required total Signal to Interference plus Noise Ratio between corresponding relation obtain being correctly decoded the required total Signal to Interference plus Noise Ratio S2 of first data flow.
D3, according to S1 and S2 calculate retransmit first data flow required first retransmit power.
Concrete, the embodiment of the invention can be used as the difference of S2 and S1 retransmitting the first required re-transmission power of first data flow.
D4, send first feedback message, carry first in first feedback message and retransmit power to the base station.
Concrete, terminal can send first feedback message to the base station in the embodiment of the invention, carries first in first feedback message and retransmits power.
The base station retransmits power according to first and retransmits first data flow, and send second data flow to terminal after receiving first feedback message.
D5, reception base station retransmit first data flow and second data flow that sends.
Concrete, terminal receives the base station and retransmits first data flow and second data flow that sends by transmission block, and transmission block is carried out despreading, obtains the base station and retransmits first data flow and second data flow that sends.
D6, second data flow that receives is decoded, first data flow that receives for the first time and base station are retransmitted first data flow that sends merge decoding.
Concrete, second data flow that end-on is received is decoded, and first data flow that receives for the first time and base station is retransmitted first data flow that sends merge decoding.Be correctly decoded the required gross power of first data flow because the power after first data flow that first data flow that receives for the first time and base station re-transmission send merges satisfies, so terminal can be correctly decoded first data flow.
In embodiments of the present invention, terminal is when decoding first traffic error, obtain and be correctly decoded the first required re-transmission power of first data flow, and send to the base station and to carry first first feedback message that retransmits power, thereby make terminal to retransmit first data flow that sends and merge decoding first data flow that receives for the first time and base station, promptly be correctly decoded under the situation of first data flow in assurance, second data flow can also receive and decode.Compared with prior art, the embodiment of the invention can improve the efficiency of transmission of data, saves the power resource of base station.
Referring to Fig. 5, Fig. 5 is the flow chart of the data repeating method that provides of the embodiment of the invention five.
The embodiment of the invention continues to come the data of description repeating method from end side, and data repeating method comprises:
First data flow that E1, reception base station send is decoded to first data flow.
E2, during first traffic error, obtain the Signal to Interference plus Noise Ratio S1 of first data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of first data flow in decoding.
E3, according to S1 and S2 calculate retransmit first data flow required first retransmit power.
E4, send first feedback message, carry first in first feedback message and retransmit power to the base station.
E5, reception base station retransmit first data flow and second data flow that sends.
E6, second data flow that receives is decoded, first data flow that receives for the first time and base station are retransmitted first data flow that sends merge decoding.
Wherein, the implementation of step e 1-E6 is identical with the implementation of step D1-D6 in the foregoing description three, no longer is repeated in this description at this.
E7, when second data flow is carried out decoding error, obtain the Signal to Interference plus Noise Ratio S3 of second data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S4 of second data flow.
Concrete, the embodiment of the invention can be when decoding second traffic error, second data flow that buffer memory receives, and obtain the Signal to Interference plus Noise Ratio S3 of second data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S4 of second data flow.Wherein, terminal can according to the coded system of second data flow inquire about coded system and be correctly decoded data flow and required total Signal to Interference plus Noise Ratio between corresponding relation obtain being correctly decoded the required total Signal to Interference plus Noise Ratio S4 of second data flow.
E8, according to S3 and S4 calculate retransmit second data flow required second retransmit power.
Concrete, the embodiment of the invention can be used as the difference of S4 and S3 retransmitting the second required re-transmission power of second data flow.
E9, send second feedback message, carry second in second feedback message and retransmit power to the base station.
E10, receive second data flow that the base station sends, second data flow that receives for the first time and base station are retransmitted second data flow that sends merge decoding.
Concrete, terminal receives second data flow that the base station sends by transmission block, transmission block is carried out despreading obtain second data flow that the base station retransmit to send, then second data flow that receives for the first time and base station are retransmitted second data flow that sends and merge decoding.Be correctly decoded the required gross power of second data flow because the power after second data flow that second data flow that receives for the first time and base station re-transmission send merges satisfies, so terminal can be correctly decoded second data flow.
In embodiments of the present invention, terminal is when decoding second traffic error, obtain and be correctly decoded the first required re-transmission power of second data flow, and send to the base station and to carry second second feedback message that retransmits power, thereby make terminal to retransmit second data flow that sends and merge decoding second data flow that receives for the first time and base station, promptly be correctly decoded under the situation of second data flow in assurance, the 3rd data flow can also receive and decode.Compared with prior art, the embodiment of the invention can improve the efficiency of transmission of data, saves the power resource of base station.
For understanding the embodiment of the invention in more detail, provide the concrete application scenarios of the embodiment of the invention below again.
Referring to Fig. 6, Fig. 6 is the application scenarios figure of the data repeating method that provides of the embodiment of the invention six.Should use in the scene, mutual network element comprises base station and terminal.The base station is this terminal distribution physical transfer resource when terminal is carried out descending scheduling, this terminal corresponding physical transfer resource is called a transmission block.Data repeating method mainly comprises:
S1, base station are with downlink full power transmission data flow #0.
The base station obtains data flow #0 and data flow #1 in embodiments of the present invention, and wherein first data flow is data flow #0, and second data flow is data flow #1, adopts orthogonal code a spread spectrum during data flow #0 transmission, and launches with total power P=1.
Transmission block can comprise two data flow in embodiments of the present invention, promptly can only comprise data flow #0, perhaps comprises two data flow of data flow #0 and data flow #1 simultaneously, it is to be noted that transmission block can also comprise more data stream.
S2, terminal receive transmission block, and decoded data stream #0 calculates first and retransmits power.
Concrete, terminal receives the transmission block that the base station sends, and uses orthogonal code a that transmission block is carried out despreading, and the data flow #0 after the despreading is decoded.In when failure decoding, the data flow #0 that buffer memory receives, and obtain according to the modulation coding mode of data flow #0 and to be correctly decoded the required total Signal to Interference plus Noise Ratio of data flow #0.The Signal to Interference plus Noise Ratio that total Signal to Interference plus Noise Ratio that the terminal basis is obtained is removed the data flow #0 that receives obtains the required Signal to Interference plus Noise Ratio of data retransmission stream #0, and then obtains the first required re-transmission power m of data retransmission stream #0 according to the required Signal to Interference plus Noise Ratio of data retransmission stream #0.
S3, terminal send first feedback message that carries the first re-transmission power m to the base station.
Wherein, carry the sign #0 of first data flow and the first corresponding re-transmission power m in first feedback message.
S4, base station receive first feedback message, retransmit the transmitting power that power m adjusts data flow according to first.
Concrete, first feedback message of base station receiving terminal, and adjust the re-transmission power of data flow accordingly, if first retransmit power m more than or equal to the downlink total power, then the base station sends data retransmission with total power; If first retransmits power m less than the downlink total power, then the base station is except retransmitting power m transmitting data stream #0 with first of indication, utilizes the downlink total power to remove first of indication simultaneously and retransmits dump power (1-m) behind the power m and come data flow #1 in the transmission buffer.
In embodiments of the present invention, second data flow is data flow #1.In addition, the mode of code division multiplexing is used in the base station when sending data flow #0 and data flow #1 by transmission block.The base station is with the power data retransmission of P=m stream #0, and its corresponding orthogonal intersection of data flow #0 is a, and with the dump power transmitting data stream #1 of P=(1-m), its corresponding orthogonal intersection is b.
In embodiments of the present invention, the data volume of data flow #1 is less, and the base station can adopt less modulating-coding speed can satisfy the required whole power of data flow #1 transmission to guarantee the transmission power in the data flow #0 retransmission processes as far as possible.
S5, terminal receive transmission block, decoded data stream #0 and data flow #1, the second re-transmission power n that calculated data stream #1 is required.
Concrete, terminal is used orthogonal intersection a respectively, and the b despreading goes out data flow #0 and data flow #1, and data flow #0 and data flow #1 are decoded.For data flow #0, terminal is decoded this data retransmission that receives stream #0 data in buffer stream #0 merging before together, and it is 0 that decoding is correctly fed back required re-transmission power, promptly indicates base station data stream #0 no longer to need re-transmission.
Equally, for data flow #1, terminal attempts this data flow #1 is decoded.If terminal can be correctly decoded, then feeding back the second required re-transmission power is 0, and indication base station data stream #1 does not need to retransmit.Be that example describes with the decoding terminals failure in embodiments of the present invention, decoding terminals data flow #1 failure, then second of calculated data stream #1 retransmit power n, wherein calculate second and retransmit the method for the method of power n with reference to the aforementioned calculation first re-transmission power m, terminal retransmits power n by second feedback message with second and sends to the base station.
S6, terminal send second feedback message to the base station, carry second in second feedback message and retransmit power.
Concrete, carry the sign #0 of first data flow and the corresponding first re-transmission power 0 and the sign #1 of second data flow and the second corresponding re-transmission power n in second feedback message.
S7, base station receive second feedback message, retransmit the transmitting power that power n adjusts data flow according to second.
Concrete, second of base station receiving terminal feedback retransmits power n, learn that the second required re-transmission power n of data flow #1 is less than the downlink total power, so whether new data flow (data flow #2) to be transmitted is arranged in the query caching, and data flow #1 sent in a transmission block with data flow #2 code division multiplexing, launch data flow #1 the base station with power n, corresponding orthogonal intersection b; The base station is removed dump power (1-n) emission after second of data flow #1 retransmits power n, the corresponding orthogonal intersection a of data flow #2 with data flow #2 with the downlink total power.
Wherein, whether the upper-layer protocol stack can be monitored in the base station has this terminal corresponding downlink data to be sent, if having, then dispatch this data flow, it is carried out modulating-coding, and put into buffer memory, in order to sending under the situation that in current data flow transmitted retransmission processes, has dump power.
S8, terminal receive transmission block, decoded data stream #1 and data flow #2, the required retransmission power q of calculated data stream #2.
Concrete, the transmission block that end-on is received is used orthogonal intersection a respectively, and the b despreading goes out data flow #2 and data flow #1, and attempts data stream is decoded.For data flow #1, terminal is decoded the data retransmission stream #1 that receives with data in buffer stream #1 merging before, and it is 0 that decoding is correctly then fed back required re-transmission power, and promptly indicating base station data to flow #1 no longer needs to retransmit.
Equally, for data flow #2, terminal attempts this data flow #2 is decoded.If terminal can be correctly decoded data flow #2, then feeding back required retransmission power is 0, and indication base station data stream #2 does not need to retransmit.Be that example describes with the decoding terminals failure in embodiments of the present invention, decoding terminals data flow #2 failure, then the retransmission power q of terminal calculated data stream #2 wherein calculates the method for the method of retransmission power q with reference to the aforementioned calculation first re-transmission power m.
S9, terminal send the 3rd feedback message to the base station, carry retransmission power q in the 3rd feedback message.
Wherein, terminal sends to the base station by the 3rd feedback message with retransmission power q.
S10, base station receive the 3rd feedback message, adjust the transmitting power of data flow according to the 3rd decoding power q.
Concrete, the 3rd feedback message of base station decodes terminal, the 3rd decoding power q is less than the downlink total power, and whether then exist in the query caching needs data flow transmitted, do not need to find data flow transmitted, then with downlink total power data retransmission stream #2.
S11, terminal receive transmission block, decoded data stream #2 success, and feeding back required re-transmission power is 0.
Concrete, the transmission block that end-on is received uses orthogonal intersection a despreading to go out data flow #2, and data flow #2 is decoded.At this moment, #2 is correct for the decoding terminals data flow, and feeding back required re-transmission power is 0, promptly indicates base station data stream #1 no longer to need to retransmit, and finishes this data re-transmission process.
In embodiments of the present invention, terminal is when decoded data stream #0 or #1 mistake, obtain and be correctly decoded data flow #0 or the required re-transmission power of #1, and send to the base station and to carry the feedback message that retransmits power, the base station can be according to the downlink total power with respect to the dump power transmission terminal that retransmits power other data flow waiting for transmission, thereby improve the efficiency of transmission of data, save the power resource of base station.
The embodiment of the invention also provides the base station with method embodiment correspondence, and referring to Fig. 7, Fig. 7 is the structural representation of the base station that provides of the embodiment of the invention seven.
In embodiments of the present invention, the base station comprises:
Data flow transmitting element 110 is used for sending first data flow to terminal;
Data flow transmitting element 110 also is used for retransmitting power less than descending total power and exist need be to second data flow that terminal sends the time first, retransmit power with first and retransmit transmission first data flow, send second data flow with respect to first dump power that retransmits power to terminal with descending total power to terminal.
The base station that the embodiment of the invention provides can be used in data repeating method first embodiment of aforementioned correspondence, no longer is repeated in this description at this.
In the base station that the embodiment of the invention seven provides, message sink unit 120 also is used for second feedback message that receiving terminal returns, and carried terminal is correctly decoded the second required re-transmission power of second data flow in second feedback message;
Base station embodiment can also comprise:
First judging unit 130 is used to judge whether the second re-transmission power equals zero;
Data flow transmitting element 110 also is used for when having the 3rd data flow, retransmits power with second and retransmits transmission second data flow to terminal, sends three data flow with respect to second dump power that retransmits power to terminal with descending total power;
Data flow transmitting element 110 also is used for when not having the 3rd data flow, retransmits to terminal with descending total power and sends second data flow.
The base station that the embodiment of the invention seven provides can first of terminal feedback retransmit power less than descending flat-out situation under, total power is used for sending second data flow to terminal with respect to first dump power that retransmits power, thereby retransmit transmission first data flow and second data flow to terminal with descending total power, improve the efficiency of transmission of data, saved power resource.
Referring to Fig. 8, Fig. 8 is the structural representation of the terminal that provides of the embodiment of the invention eight.
The terminal that provides in the embodiment of the invention eight mainly comprises:
Data flow receiving element 210 is used to receive first data flow that the base station sends;
Data flow decoding unit 220 is used for first data flow is decoded;
First acquiring unit 230 is used for obtaining the Signal to Interference plus Noise Ratio S1 of first data flow that receives and being correctly decoded the required total Signal to Interference plus Noise Ratio S2 of first data flow when decoding first traffic error;
Wherein, data flow receiving element 210 also is used to receive first data flow and second data flow that the base station retransmits transmission;
Data flow decoding unit 220 also is used for second data flow that receives is decoded, and first data flow that receives for the first time and base station is retransmitted first data flow that sends merge decoding.
Among the method embodiment four that the base station embodiment that the embodiment of the invention eight provides can use in aforementioned correspondence, no longer be repeated in this description at this.
The terminal that the embodiment of the invention eight provides can also comprise:
Data flow receiving element 210 also is used to receive the base station and retransmits second data flow that sends;
Data flow decoding unit 220 also is used for second data flow of second data flow that receives for the first time and base station re-transmission transmission is merged decoding.
In embodiments of the present invention, terminal is when decoding first traffic error, obtain and be correctly decoded the first required re-transmission power of first data flow, and send to the base station and to carry first first feedback message that retransmits power, thereby make terminal to retransmit first data flow that sends and merge decoding first data flow that receives for the first time and base station, promptly be correctly decoded under the situation of first data flow in assurance, second data flow can also receive and decode.Compared with prior art, the embodiment of the invention can improve the efficiency of transmission of data, saves the power resource of base station
Need to prove, contents such as the information interaction in the said apparatus between each unit, implementation since with the inventive method embodiment based on same design, particular content can no longer be repeated in this description referring to the narration among the inventive method embodiment herein.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than to data repeating method that the embodiment of the invention provided and realize that the base station of this method, terminal are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, the part that all can change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (12)
1. a data repeating method is characterized in that, comprising:
Send first data flow to terminal;
Receive first feedback message that described terminal is returned, carried terminal is correctly decoded the first required re-transmission power of described first data flow in described first feedback message;
Retransmit power less than descending total power and exist need be to second data flow that terminal sends the time described first, retransmit power with described first and retransmit described first data flow of transmission, send described second data flow with respect to first dump power that retransmits power to described terminal with described descending total power to described terminal.
2. data repeating method according to claim 1 is characterized in that, also comprises:
Receive second feedback message that described terminal is returned, carried terminal is correctly decoded the second required re-transmission power of described second data flow in described second feedback message;
Judge whether the described second re-transmission power equals zero;
If then end data retransmits;
If not, then further judging whether to exist need be to the 3rd data flow of terminal transmission;
If there is the 3rd data flow, then retransmit power and retransmit described second data flow of transmission to described terminal with described second, send described three data flow with respect to described second dump power that retransmits power to described terminal with described descending total power;
If there is not the 3rd data flow, then retransmits to terminal and send described second data flow with descending total power.
3. data repeating method according to claim 1 is characterized in that, also comprises:
When described first retransmits power more than or equal to descending total power, retransmit described first data flow of transmission to terminal with descending total power.
4. according to each described data repeating method of claim 1 to 3, it is characterized in that the modulating-coding speed of the described second data flow correspondence is less than the modulating-coding speed of the described first data flow correspondence.
5. according to each described data repeating method of claim 1 to 3, it is characterized in that,
Use mutually orthogonal orthogonal intersection to carry out spread spectrum respectively to described first data flow and second data flow, use first data flow and second data flow of mode after terminal sends spread spectrum of code division multiplexing.
6. data repeating method according to claim 1 is characterized in that, sends first data flow to terminal and comprises: send described first data flow with descending total power to terminal.
7. a data repeating method is characterized in that, comprising:
Receive first data flow that the base station sends, described first data flow is decoded;
When described first traffic error of decoding, obtain the Signal to Interference plus Noise Ratio S1 of first data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described first data flow;
Calculate the first required re-transmission power of described first data flow of re-transmission according to described S1 and S2;
Send first feedback message to described base station, carry described first in described first feedback message and retransmit power;
Receive the base station and retransmit first data flow and second data flow that sends;
Second data flow that receives is decoded, first data flow that receives for the first time and base station are retransmitted first data flow that sends merge decoding.
8. data repeating method according to claim 7 is characterized in that, also comprises:
When described second data flow is carried out decoding error, obtain the Signal to Interference plus Noise Ratio S3 of second data flow that receives and be correctly decoded the required total Signal to Interference plus Noise Ratio S4 of described second data flow;
Calculate the second required re-transmission power of described second data flow of re-transmission according to described S3 and S4;
Send second feedback message to described base station, carry described second in described second feedback message and retransmit power;
Receive the base station and retransmit second data flow that sends, second data flow that receives for the first time and base station are retransmitted second data flow that sends merge decoding.
9. a base station is characterized in that, comprising:
The data flow transmitting element is used for sending first data flow to terminal;
The message sink unit is used to receive first feedback message that described terminal is returned, and carried terminal is correctly decoded the first required re-transmission power of described first data flow in described first feedback message;
Described data flow transmitting element also is used for retransmitting power less than descending total power and exist need be to second data flow that terminal sends the time described first, retransmit power with described first and retransmit transmission first data flow, send second data flow with respect to first dump power that retransmits power to described terminal with described descending total power to described terminal.
10. base station according to claim 9 is characterized in that,
Described message sink unit also is used to receive second feedback message that described terminal is returned, and carried terminal is correctly decoded the second required re-transmission power of described second data flow in described second feedback message;
Described base station also comprises:
First judging unit is used to judge whether the described second re-transmission power equals zero;
Second judging unit is used for when the second re-transmission power is not equal to zero, and further judging whether to exist need be to the 3rd data flow of terminal transmission;
Described data flow transmitting element also is used for when having the 3rd data flow, retransmit power with described second and retransmit described second data flow of transmission, send described the 3rd data flow with respect to described second dump power that retransmits power to described terminal with described descending total power to described terminal;
Described data flow transmitting element also is used for when not having the 3rd data flow, retransmits to terminal with descending total power and sends described second data flow.
11. a terminal is characterized in that, comprising:
The data flow receiving element is used to receive first data flow that the base station sends;
The data flow decoding unit is used for described first data flow is decoded;
First acquiring unit is used for obtaining the Signal to Interference plus Noise Ratio S1 of first data flow that receives and being correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described first data flow when described first traffic error of decoding;
First computing unit is used for calculating the first required re-transmission power of described first data flow of re-transmission according to described S1 and S2;
Message sending unit is used for sending first feedback message to described base station, carries described first in described first feedback message and retransmits power;
Described data flow receiving element also is used to receive the base station and retransmits first data flow and second data flow that sends;
Described data flow decoding unit also is used for second data flow that receives is decoded, and first data flow that receives for the first time and base station is retransmitted first data flow that sends merge decoding.
12. terminal according to claim 11 is characterized in that, also comprises:
Second acquisition unit is used for when described second data flow is carried out decoding error, obtains the Signal to Interference plus Noise Ratio S3 of second data flow that receives and is correctly decoded the required total Signal to Interference plus Noise Ratio S4 of described second data flow;
Second computing unit is used for calculating the second required re-transmission power of described second data flow of re-transmission according to described S3 and S4;
Described message sending unit also is used for sending second feedback message to described base station, carries described second in described second feedback message and retransmits power;
Described data flow receiving element also is used to receive the base station and retransmits second data flow that sends;
Described data flow decoding unit also is used for second data flow of second data flow that receives for the first time and base station re-transmission transmission is merged decoding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010113714.5A CN102149132B (en) | 2010-02-04 | 2010-02-04 | Method, base station and terminal for retransmitting data |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010113714.5A CN102149132B (en) | 2010-02-04 | 2010-02-04 | Method, base station and terminal for retransmitting data |
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| CN102149132A true CN102149132A (en) | 2011-08-10 |
| CN102149132B CN102149132B (en) | 2014-12-03 |
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| CN201010113714.5A Expired - Fee Related CN102149132B (en) | 2010-02-04 | 2010-02-04 | Method, base station and terminal for retransmitting data |
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| CN1155182C (en) * | 2001-09-27 | 2004-06-23 | 华为技术有限公司 | Power control method based on mixed automatic retransmission mechanism |
| KR100985104B1 (en) * | 2003-09-03 | 2010-10-05 | 엘지전자 주식회사 | Method for controlling power of retransmitting packet |
| CN1671067A (en) * | 2004-01-30 | 2005-09-21 | 北京三星通信技术研究有限公司 | Equipment and method for controlling retransmitted data ROT |
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