CN102149132B - Method, base station and terminal for retransmitting data - Google Patents
Method, base station and terminal for retransmitting data Download PDFInfo
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- CN102149132B CN102149132B CN201010113714.5A CN201010113714A CN102149132B CN 102149132 B CN102149132 B CN 102149132B CN 201010113714 A CN201010113714 A CN 201010113714A CN 102149132 B CN102149132 B CN 102149132B
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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, there are the time-varying characteristics such as decline and multipath due to wireless channel, reduce the reliability of transfer of data in wireless system.For improving the reliability of transfer of data, in wireless communication system, introduce data retransmission mechanism, for data retransmission in the situation that transfer of data is made mistakes.
Existing data re-transmission mechanism comprises mixed automatic retransfer request (HARQ, Hybrid AutomaticRepeat Request) mechanism, and mixed automatic retransmission request method mainly comprises: base station sends packet to terminal, and this packet of buffer memory; Base station, in the time that the feedback message receiving is positive acknowledgement (ACK, Acknowledge) message, continues to send remaining packet to terminal; The feedback message receiving in base station is negative acknowledgement message, to the packet of terminal re-sends buffer memory, until receive the positive confirmation message that terminal sends.
Inventor finds in the process of research prior art, existing mixed automatic retransmission request method sends with total power when retransmit the packet of buffer memory to terminal, cause the gross power of the packet that terminal receives to exceed the required power of decoding, caused power resource waste.
Summary of the invention
The invention provides a kind of data repeating method, base station and terminal, in the time that terminal sends retransmission data packet may, improve power resource utilance in base station.
The data repeating method that the embodiment of the present invention provides, comprising:
Send the first data flow to terminal;
Receive the first feedback message that described terminal is returned, in described the first feedback message, carried terminal is correctly decoded the first required re-transmission power of described the first data flow;
In the time that described the first re-transmission power is less than descending total power and has second data flow that need to send to terminal, retransmit power with described first and retransmit and send described the first data flow to described terminal, send described second data flow with respect to the dump power of the first re-transmission power to described terminal with described descending total power.
The embodiment of the present invention also provides another data repeating method, comprising:
Receive the first data flow that base station sends, described the first data flow is decoded;
In the time of described the first traffic error of decoding, obtain the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described the first data flow;
Calculate the first required re-transmission power of described the first data flow of re-transmission according to described S1 and S2;
Send the first feedback message to described base station, in described the first feedback message, carry described first and retransmit power;
Receive base station and retransmit the first data flow and the second data flow that send;
The second data flow receiving is decoded, the first data flow of the first data flow receiving for the first time and base station re-transmission transmission is merged to decoding.
The embodiment of the present invention also provides a kind of base station, comprising:
Data flow transmitting element, for sending the first data flow to terminal;
Message sink unit, the first feedback message returning for receiving described terminal, in described the first feedback message, carried terminal is correctly decoded the first required re-transmission power of described the first data flow;
Described data flow transmitting element is also in the time that described the first re-transmission power is less than descending total power and has second data flow that need to send to terminal, retransmit power with described first and retransmit and send the first data flow to described terminal, send second data flow with respect to the dump power of the first re-transmission power to described terminal with described descending total power.
The embodiment of the present invention also provides a kind of terminal, comprising:
Data flow receiving element, the first data flow sending for receiving base station;
Data flow decoding unit, for decoding to described the first data flow;
The first acquiring unit, in the time decoding described the first traffic error, obtains the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and is correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described the first data flow;
The first computing unit, for calculating the first required re-transmission power of described the first data flow of re-transmission according to described S1 and S2;
Message sending unit, for sending the first feedback message to described base station, carries described first and retransmits power in described the first feedback message;
Described data flow receiving element also retransmits for receiving base station the first data flow and the second data flow that send;
Described data flow decoding unit, also for the second data flow receiving is decoded, merges decoding to the first data flow of the first data flow receiving for the first time and base station re-transmission transmission.
In embodiments of the present invention, retransmitting power at first of terminal feedback is less than in descending flat-out situation, total power is used for sending the second data flow to terminal with respect to the dump power of the first re-transmission power, thereby send the first data flow and the second data flow with descending total power to terminal, improve the efficiency of transmission of data, saved power resource.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of the data repeating method that provides of the embodiment of the present invention one;
Fig. 2 is the flow chart of the data repeating method that provides of the embodiment of the present invention two;
Fig. 3 is the flow chart of the data repeating method that provides of the embodiment of the present invention three;
Fig. 4 is the flow chart of the data repeating method that provides of the embodiment of the present invention four;
Fig. 5 is the flow chart of the data repeating method that provides of the embodiment of the present invention five;
Fig. 6 is the application scenarios figure of the data repeating method that provides of the embodiment of the present invention six;
Fig. 7 is the structural representation of the base station that provides of the embodiment of the present invention seven;
Fig. 8 is the structural representation of the terminal that provides of the embodiment of the present invention eight.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme of data repeating method, base station and the terminal that the embodiment of the present invention is provided is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, Fig. 1 is the flow chart of the data repeating method that provides of the embodiment of the present invention one.
The data repeating method that the embodiment of the present invention provides can comprise:
A1, send the first data flow to terminal.
In embodiments of the present invention, base station can obtain first data flow that need to send to terminal, and sends the first data flow by transmission block (TB, Transport Block) to terminal.Terminal will be returned to the first feedback message receiving after the first data flow.
The first feedback message that A2, receiving terminal return, in the first feedback message, carried terminal is correctly decoded the first required re-transmission power of the first data flow.
Concrete, the first feedback message that in the embodiment of the present invention, base station receiving terminal returns, in the first feedback message, carried terminal is correctly decoded the first required re-transmission power of the first data flow.
A3, be less than descending total power at the first re-transmission power, and while there is second data flow that need to send to terminal, retransmit and send the first data flow to terminal with the first re-transmission power, send second data flow with respect to the dump power of the first re-transmission power to terminal with descending total power.
Concrete, in the embodiment of the present invention, base station is in the time that the first re-transmission power is less than descending total power and while there is second data flow that need to send to terminal, retransmit and send the first data flow to terminal with the first re-transmission power by transmission block, send second data flow with respect to the dump power of the first re-transmission power to terminal with descending total power, the first data flow and the second distribution of flows identical transmission block.
In embodiments of the present invention, retransmitting power at first of terminal feedback is less than in descending flat-out situation, total power is used for sending the second data flow to terminal with respect to the dump power of the first re-transmission power, thereby retransmit and send the first data flow and the 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 can be in the time that the first re-transmission power be more than or equal to descending total power, retransmit and send the first data flow to terminal with descending total power, thereby the decoding power of the first data flow that terminal receives is met the demands, realize the 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 present invention two
In embodiments of the present invention, base station need to send the first data flow to terminal, and in the embodiment of the present invention, base station obtains first data flow that need to send to terminal, and the first data flow is dispatched to coding.The data repeating method that the embodiment of the present invention provides mainly comprises:
B1, send the first data flow with descending total power to terminal.
In embodiments of the present invention, base station sends first data flow with descending total power to terminal by transmission block.Terminal will be returned to the first feedback message receiving after the first data flow.
It is to be noted, it is only preferably execution mode of one that base station sends the first data flow with descending total power to terminal, base station can also send the first data flow and the second data flow to terminal with descending total power, or sends more than two data flow with descending total power to terminal.
The first feedback message that B2, receiving terminal return, in the first feedback message, carried terminal is correctly decoded the first required re-transmission power of the first data flow.
Concrete, the first feedback message that in the embodiment of the present invention, base station receiving terminal returns, in the first feedback message, carried terminal is correctly decoded the first required re-transmission power of the first data flow.
B3, the first re-transmission power be less than descending total power and exist need to terminal send the second data flow time, retransmit and send the first data flow to terminal with the first re-transmission power, send second data flow with respect to the dump power of the first re-transmission power to terminal with descending total power.
Concrete, in the embodiment of the present invention, base station is in the time that the first re-transmission power is less than descending total power and while there is second data flow that need to send to terminal, retransmit and send the first data flow to terminal with the first re-transmission power by transmission block, send second data flow with respect to the dump power of the first re-transmission power to terminal with descending total power, the first data flow and the second distribution of flows identical transmission block.
In embodiments of the present invention, retransmitting power at first of terminal feedback is less than in descending flat-out situation, total power is used for sending the second data flow to terminal with respect to the dump power of the first re-transmission power, thereby retransmit and send the first data flow and the 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 first data flow and the second data flow that base station scheduling need to send to terminal, and modulating-coding speed corresponding to the second data flow that scheduling obtains is less than modulating-coding speed corresponding to described the first data flow, and then make descending total power can meet the demand that sends the second data flow with respect to the dump power of the first re-transmission power as far as possible, reduce the number of transmissions of the second data flow, improve data transmission efficiency.
In embodiments of the present invention, base station can be used respectively mutually orthogonal orthogonal intersection to carry out spread spectrum to the first data flow and the second data flow, use the mode of code division multiplexing to send the first data flow and the second data flow after spread spectrum to terminal, now the first data flow and the second data flow different orthogonal intersection of correspondence respectively.Certainly base station can also adopt other multiplex mode to send the first data flow and the second data flow.With respect to other multiplex mode, code division multiplexing can reduce the interference between the first data flow and the second data flow, reduces the probability that data are made mistakes.
Referring to Fig. 3, Fig. 3 is the flow chart of the data repeating method that provides of the embodiment of the present invention two.
The data repeating method providing in the embodiment of the present invention two can comprise:
C1, send the first data flow to terminal.
The first feedback message that C2, receiving terminal return, in the first feedback message, carried terminal is correctly decoded the first required re-transmission power of the first data flow.
C3, the first re-transmission power be less than descending total power and exist need to terminal send the second data flow time, retransmit and send the first data flow to terminal with the first re-transmission power, send second data flow with respect to the dump power of the first re-transmission power to terminal with descending total power.
Wherein, the implementation of step C1-C3 is identical with above-mentioned steps A1-A3, is no longer repeated in this description at this.
Terminal receive and decode the first data flow and the second data flow, return to the second feedback message to base station.
The second feedback message that C4, receiving terminal return, in the second feedback message, carried terminal is correctly decoded the second required re-transmission power of the second data flow.
Concrete, the second feedback message that base station receiving terminal returns, in the second feedback message, carried terminal is correctly decoded the second required re-transmission power of the second data flow and is correctly decoded the required retransmission power of the first data flow, and being now correctly decoded the required re-transmission power of the first data flow is 0.
C5, judge second retransmit power whether be zero.
Concrete, in the embodiment of the present invention, base station can judge whether the second re-transmission power is 0, if so, illustrates that the second data flow sends successfully, finishes this data re-transmission process.
If the second re-transmission power is not 0, perform step B7.
C6, judge whether exist need to terminal send the 3rd data flow.
Concrete, in the embodiment of the present invention, base station is not 0 o'clock at the second re-transmission power, further judges whether to exist the 3rd data flow that need to send to this terminal.If so, perform step C7, otherwise execution step C8.
If there is the 3rd data flow in C7, retransmit and send the second data flow to terminal with the second re-transmission power, send three data flow with respect to the dump power of the second re-transmission power to terminal with descending total power.
Concrete, base station is in the time there is the 3rd data flow that need to send to terminal in judgement, obtain the 3rd data flow that need to send to terminal, retransmit and send the second data flow to terminal with the second re-transmission power by transmission block, send three data flow with respect to the dump power of the second re-transmission power to terminal with descending total power.
In embodiments of the present invention, base station is sending after the 3rd data flow to terminal with respect to the dump power of the second re-transmission power with descending total power, can also receive the feedback message that terminal is returned, in feedback message, can carry 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, retransmit the 3rd data flow with descending total power.
If C8 does not exist the 3rd data flow, retransmit and send the second data flow to terminal with descending total power.
Concrete, base station, in the time not there is not the 3rd data flow, is retransmitted and sends the second data flow to terminal with descending total power by transmission block, and finish this data re-transmission process.
In the data repeating method providing in the embodiment of the present invention, it is non-vanishing and while there is the 3rd data flow that base station retransmits power according to carry in the second feedback message receiving second, retransmit and send the second data flow and the 3rd data flow to terminal with descending total power, 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 present invention four.
The embodiment of the present invention is carried out data of description repeating method from end side, and data repeating method mainly comprises:
The first data flow that D1, reception base station send, decodes to the first data flow.
Concrete, in the embodiment of the present invention, terminal can receive the transmission block that base station sends, and comprises the first data flow in transmission block, and the first data flow that end-on is received is decoded.
D2,, obtain the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of the first data flow when the first traffic error in decoding.
Concrete, the terminal in the embodiment of the present invention can be in the time of decoding the first traffic error, the first data flow that buffer memory receives, and obtain the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of the first data flow.Wherein, terminal can according to the coded system of the 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 the first data flow.
D3, according to S1 and S2 calculate retransmit the first data flow required first retransmit power.
Concrete, the embodiment of the present invention can be used as the difference of S2 and S1 retransmitting the first required re-transmission power of the first data flow.
D4, send the first feedback message to base station, in the first feedback message, carry the first re-transmission power.
Concrete, in the embodiment of the present invention, terminal can send to base station the first feedback message, carries the first re-transmission power in the first feedback message.
Base station is receiving after the first feedback message, retransmits the first data flow, and send the second data flow to terminal according to the first re-transmission power.
D5, reception base station retransmit the first data flow and the second data flow that send.
Concrete, terminal receives base station and retransmits the first data flow and the second data flow that send by transmission block, and transmission block is carried out to despreading, obtains base station and retransmits the first data flow and the second data flow that send.
D6, the second data flow receiving is decoded, the first data flow receiving for the first time and base station are retransmitted to the first data flow sending and merge decoding.
Concrete, the second data flow that end-on is received is decoded, and the first data flow of the first data flow receiving for the first time and base station re-transmission transmission is merged to decoding.Be correctly decoded the required gross power of the first data flow because the power after the first data stream merging of the first data flow receiving for the first time and base station re-transmission transmission meets, therefore terminal can be correctly decoded the first data flow.
In embodiments of the present invention, terminal is in the time of decoding the first traffic error, obtain and be correctly decoded the first required re-transmission power of the first data flow, and send and carry the first feedback message of the first re-transmission power to base station, thereby make terminal to merge decoding to the first data flow of the first data flow receiving for the first time and base station re-transmission transmission, in the situation that ensureing to be correctly decoded the first data flow, the second data flow can also receive and decode.Compared with prior art, the embodiment of the present 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 present invention five.
The embodiment of the present invention continues to carry out data of description repeating method from end side, and data repeating method comprises:
The first data flow that E1, reception base station send, decodes to the first data flow.
E2,, obtain the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S2 of the first data flow when the first traffic error in decoding.
E3, according to S1 and S2 calculate retransmit the first data flow required first retransmit power.
E4, send the first feedback message to base station, in the first feedback message, carry the first re-transmission power.
E5, reception base station retransmit the first data flow and the second data flow that send.
E6, the second data flow receiving is decoded, the first data flow receiving for the first time and base station are retransmitted to the first data flow sending and merge decoding.
Wherein, the implementation of step e 1-E6 is identical with the implementation of step D1-D6 in above-described embodiment three, is no longer repeated in this description at this.
E7, in the time that the second data flow is carried out to decoding error, obtain the Signal to Interference plus Noise Ratio S3 of the second data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S4 of the second data flow.
Concrete, the embodiment of the present invention can be in the time of decoding the second traffic error, the second data flow that buffer memory receives, and obtain the Signal to Interference plus Noise Ratio S3 of the second data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S4 of the second data flow.Wherein, terminal can according to the coded system of the 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 the second data flow.
E8, according to S3 and S4 calculate retransmit the second data flow required second retransmit power.
Concrete, the embodiment of the present invention can be used as the difference of S4 and S3 retransmitting the second required re-transmission power of the second data flow.
E9, send the second feedback message to base station, in the second feedback message, carry the second re-transmission power.
The second data flow that E10, reception base station send, merges decoding to the second data flow of the second data flow receiving for the first time and base station re-transmission transmission.
Concrete, terminal receives the second data flow that base station sends by transmission block, transmission block is carried out to despreading and obtain the second data flow that base station re-transmission sends, then the second data flow of the second data flow receiving for the first time and base station re-transmission transmission is merged to decoding.Be correctly decoded the required gross power of the second data flow because the power after the second data stream merging of the second data flow receiving for the first time and base station re-transmission transmission meets, therefore terminal can be correctly decoded the second data flow.
In embodiments of the present invention, terminal is in the time of decoding the second traffic error, obtain and be correctly decoded the first required re-transmission power of the second data flow, and send and carry the second feedback message of the second re-transmission power to base station, thereby make terminal to merge decoding to the second data flow of the second data flow receiving for the first time and base station re-transmission transmission, in the situation that ensureing to be correctly decoded the second data flow, the 3rd data flow can also receive and decode.Compared with prior art, the embodiment of the present invention can improve the efficiency of transmission of data, saves the power resource of base station.
For understanding in more detail the embodiment of the present invention, provide again the concrete application scenarios of the embodiment of the present invention below.
Referring to Fig. 6, Fig. 6 is the application scenarios figure of the data repeating method that provides of the embodiment of the present invention six.In this application scene, mutual network element comprises base station and terminal.Base station, in the time that terminal is carried out to descending scheduling, is this terminal distribution physical transfer resource, and physical transfer resource corresponding to this terminal is called a transmission block.Data repeating method mainly comprises:
S1, base station are with downlink full power transmission data flow #0.
Base station obtains data flow #0 and data flow #1 in embodiments of the present invention, and wherein the first data flow is data flow #0, and the second data flow is data flow #1, and data flow #0 adopts orthogonal code a spread spectrum when transmission, and launches with total power P=1.
Transmission block can comprise two data flow in embodiments of the present invention, can only comprise data flow #0, or comprises data flow #0 and two data flow of data flow #1 simultaneously, it is to be noted that transmission block can also comprise more data flow.
S2, terminal receive transmission block, and decoded data stream #0 calculates first and retransmits power.
Concrete, terminal receives the transmission block that base station sends, and uses orthogonal code a to carry out despreading to transmission block, and to the data flow #0 decoding after despreading.In the time decoding unsuccessfully, the data flow #0 that buffer memory receives, and obtain and be correctly decoded the required total Signal to Interference plus Noise Ratio of data flow #0 according to the modulation coding mode of data flow #0.The Signal to Interference plus Noise Ratio that total Signal to Interference plus Noise Ratio that terminal basis is obtained is removed the data flow #0 receiving 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 the first feedback message that carries the first re-transmission power m to base station.
Wherein, in the first feedback message, carry the mark #0 of the first data flow and the first corresponding re-transmission power m.
S4, base station receive the first feedback message, adjust the transmitting power of data flow according to the first re-transmission power m.
Concrete, the first feedback message of base station receiving terminal, and adjust accordingly the re-transmission power of data flow, if first retransmit power m and be more than or equal to downlink total power, base station sends data retransmission with total power; Be less than downlink total power if first retransmits power m, base station is except retransmitting power m transmitting data stream #0 with first of instruction, and the first dump power (1-m) retransmitting after power m of simultaneously utilizing downlink total power to remove instruction is carried out the data flow #1 in transmission buffer.
In embodiments of the present invention, the second data flow is data flow #1.In addition, base station is used the mode of code division multiplexing when send data flow #0 and data flow #1 by transmission block.The power data retransmission stream #0 of P=m for base station, 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 base station can adopt less modulating-coding speed to ensure that transmission power in data flow #0 retransmission processes can meet data flow #1 and transmit required whole power 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 respectively orthogonal intersection a, and b solution expands 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 stream #0 receiving with the data flow #0 merging of buffer memory before, and the required re-transmission power of the correct feedback of decoding is 0, and indicating base station data to flow #0 no longer needs re-transmission.
Equally, for data flow #1, terminal attempts this data flow #1 to decode.If terminal can be correctly decoded, feeding back the second required re-transmission power is 0, and instruction base station data stream #1 does not need to retransmit.In embodiments of the present invention taking decoding terminals unsuccessfully as example describes, decoding terminals data flow #1 failure, second of calculated data stream #1 retransmit power n, the method of wherein calculating the second re-transmission power n retransmits the method for power m with reference to above-mentioned calculating first, terminal sends to base station by the second feedback message by the second re-transmission power n.
S6, terminal send the second feedback message to base station, carry the second re-transmission power in the second feedback message.
Concrete, in the second feedback message, carry the mark #0 of the first data flow and corresponding the first re-transmission power 0 and the mark #1 of the second data flow and the second corresponding re-transmission power n.
S7, base station receive the second feedback message, adjust the transmitting power of data flow according to the second re-transmission power n.
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 downlink total power, so whether there is new data flow (data flow #2) to be transmitted in query caching, and data flow #1 is sent in a transmission block with data flow #2 code division multiplexing, launch data flow #1 base station with power n, corresponding orthogonal intersection b; Base station is removed second of data flow #1 by data flow #2 with downlink total power and is retransmitted dump power (1-n) transmitting after power n, the corresponding orthogonal intersection a of data flow #2.
Wherein, whether upper-layer protocol stack can be monitored in base station has downlink data corresponding to this terminal to be sent, if had, dispatch this data flow, it is carried out to modulating-coding, and put into buffer memory, in order to existing dump power and send in the data flow retransmission processes of current transmission.
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 respectively orthogonal intersection a, and b solution expands data flow #2 and data flow #1, and attempts data stream to decode.For data flow #1, terminal is decoded the data retransmission stream #1 receiving with the data flow #1 merging of buffer memory before, and it is 0 that decoding is correctly fed back required re-transmission power, indicates base station data stream #1 no longer to need re-transmission.
Equally, for data flow #2, terminal attempts this data flow #2 to decode.If terminal can be correctly decoded data flow #2, feeding back required retransmission power is 0, and instruction base station data stream #2 does not need to retransmit.In embodiments of the present invention taking decoding terminals unsuccessfully as example describes, decoding terminals data flow #2 failure, the retransmission power q of terminal calculated data stream #2, the method for wherein calculating retransmission power q retransmits the method for power m with reference to above-mentioned calculating first.
S9, terminal send the 3rd feedback message to base station, in the 3rd feedback message, carry retransmission power q.
Wherein, terminal sends to base station by the 3rd feedback message by 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 downlink total power, in query caching, whether has the data flow that needs transmission, find not need the data flow of transmission, 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 solution to expand data flow #2, and data flow #2 is decoded.Now, #2 is correct for decoding terminals data flow, and feeding back required re-transmission power is 0, 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 in the time of decoded data stream #0 or #1 mistake, obtain and be correctly decoded data flow #0 or the required re-transmission power of #1, and carry to base station transmission the feedback message that retransmits power, base station can be according to downlink total power with respect to retransmitting the dump power transmission terminal of 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 present invention also provides the base station corresponding with embodiment of the method, and referring to Fig. 7, Fig. 7 is the structural representation of the base station that provides of the embodiment of the present invention seven.
In embodiments of the present invention, base station comprises:
Data flow transmitting element 110, for sending the first data flow to terminal;
Message sink unit 120, the first feedback message returning for receiving terminal, in the first feedback message, carried terminal is correctly decoded the first required re-transmission power of the first data flow;
Data flow transmitting element 110 also for be less than at the first re-transmission power descending total power and exist need to terminal send the second data flow time, retransmit and send the first data flow to terminal with the first re-transmission power, send second data flow with respect to the dump power of the first re-transmission power to terminal with descending total power.
The base station that the embodiment of the present invention provides can be used in data repeating method first embodiment of aforementioned correspondence, is no longer repeated in this description at this.
In the base station providing in the embodiment of the present invention seven, the second feedback message that message sink unit 120 also returns for receiving terminal, in the second feedback message, carried terminal is correctly decoded the second required re-transmission power of the second data flow;
Base station embodiment can also comprise:
The first judging unit 130, for judging whether the second re-transmission power equals zero;
The second judging unit 140, for being not equal at 1 o'clock at the second re-transmission power, further judges whether to exist the 3rd data flow that need to send to terminal;
Data flow transmitting element 110, also in the time there is the 3rd data flow, retransmits and sends the second data flow to terminal with the second re-transmission power, sends the 3rd data flow with descending total power with respect to the dump power of the second re-transmission power to terminal;
Data flow transmitting element 110, also in the time not there is not the 3rd data flow, retransmits and sends the second data flow to terminal with descending total power.
The base station that the embodiment of the present invention seven provides can retransmit power first of terminal feedback and be less than in descending flat-out situation, total power is used for sending the second data flow to terminal with respect to the dump power of the first re-transmission power, thereby retransmit and send the first data flow and the 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 present invention eight.
The terminal providing in the embodiment of the present invention eight mainly comprises:
Data flow receiving element 210, the first data flow sending for receiving base station;
Data flow decoding unit 220, for decoding to the first data flow;
The first acquiring unit 230, in the time decoding the first traffic error, obtains the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and is correctly decoded the required total Signal to Interference plus Noise Ratio S2 of the first data flow;
The first computing unit 240, for calculating the first required re-transmission power of re-transmission the first data flow according to S1 and S2;
Message sending unit 250, for send the first feedback message to base station, carries the first re-transmission power in the first feedback message;
Wherein, data flow receiving element 210 also retransmits for receiving base station the first data flow and the second data flow that send;
Data flow decoding unit 220, also for the second data flow receiving is decoded, merges decoding to the first data flow of the first data flow receiving for the first time and base station re-transmission transmission.
The base station embodiment that the embodiment of the present invention eight provides can use in the embodiment of the method four of aforementioned correspondence, is no longer repeated in this description at this.
The terminal that the embodiment of the present invention eight provides can also comprise:
Second acquisition unit 260, in the time that the second data flow is carried out to decoding error, obtains the Signal to Interference plus Noise Ratio S3 of the second data flow receiving and is correctly decoded the required total Signal to Interference plus Noise Ratio S4 of the second data flow;
The second computing unit 270, for calculating the second required re-transmission power of re-transmission the second data flow according to S3 and S4;
Message sending unit 250 also, for send the second feedback message to base station, is carried the second re-transmission power in the second feedback message;
Data flow receiving element 210 also retransmits for receiving base station the second data flow sending;
Data flow decoding unit 220 is also for merging decoding to the second data flow of the second data flow receiving for the first time and base station re-transmission transmission.
In embodiments of the present invention, terminal is in the time of decoding the first traffic error, obtain and be correctly decoded the first required re-transmission power of the first data flow, and send and carry the first feedback message of the first re-transmission power to base station, thereby make terminal to merge decoding to the first data flow of the first data flow receiving for the first time and base station re-transmission transmission, in the situation that ensureing to be correctly decoded the first data flow, the second data flow can also receive and decode.Compared with prior art, the embodiment of the present invention can improve the efficiency of transmission of data, saves the power resource of base station
It should be noted that, the content such as information interaction, implementation in said apparatus between each unit, due to the inventive method embodiment based on same design, particular content can, referring to the narration in the inventive method embodiment, no longer be repeated in this description herein.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, program can be stored in computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The data repeating method above embodiment of the present invention being provided and the base station, the terminal that realize the method are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will 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:
Base station sends the first data flow to terminal;
Described base station receives the first feedback message that described terminal is returned, and in described the first feedback message, carried terminal is correctly decoded the first required re-transmission power of described the first data flow;
Described base station is in the time that described the first re-transmission power is less than descending total power and has second data flow that need to send to terminal, retransmit power with described first and retransmit and send described the first data flow to described terminal, send described second data flow with respect to the dump power of the first re-transmission power to described terminal with described descending total power.
2. data repeating method according to claim 1, is characterized in that, also comprises:
Receive the second feedback message that described terminal is returned, in described the second feedback message, carried terminal is correctly decoded the second required re-transmission power of described the second data flow;
Judge whether described the second re-transmission power equals zero;
If so, end data retransmits;
If not, further judge whether to exist the 3rd data flow that need to send to terminal;
If there is the 3rd data flow, retransmit power with described second and retransmit and send described the second data flow to described terminal, send described three data flow with respect to the described second dump power that retransmits power to described terminal with described descending total power;
If there is not the 3rd data flow, retransmit and send described the second data flow to terminal with descending total power.
3. data repeating method according to claim 1, is characterized in that, also comprises:
In the time that described the first re-transmission power is more than or equal to descending total power, retransmits and send described the first data flow to terminal with descending total power.
4. according to the data repeating method described in claim 1 to 3 any one, it is characterized in that, modulating-coding speed corresponding to described the second data flow is less than modulating-coding speed corresponding to described the first data flow.
5. according to the data repeating method described in claim 1 to 3 any one, it is characterized in that,
Use respectively mutually orthogonal orthogonal intersection to carry out spread spectrum to described the first data flow and the second data flow, use the mode of code division multiplexing to send the first data flow and the second data flow after spread spectrum to terminal.
6. data repeating method according to claim 1, is characterized in that, sends the first data flow comprise to terminal: send described the first data flow with descending total power to terminal.
7. a data repeating method, is characterized in that, comprising:
Terminal receives the first data flow that base station sends, and described the first data flow is decoded;
Described terminal, in the time of described the first traffic error of decoding, is obtained the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and is correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described the first data flow;
Described terminal is calculated the first required re-transmission power of described the first data flow of re-transmission according to described S1 and S2;
Described terminal sends the first feedback message to described base station, carries described first and retransmit power in described the first feedback message;
Described terminal receives base station and retransmits the first data flow and the second data flow that send;
The second data flow that described end-on is received is decoded, and the first data flow of the first data flow receiving for the first time and base station re-transmission transmission is merged to decoding.
8. data repeating method according to claim 7, is characterized in that, also comprises:
In the time that described the second data flow is carried out to decoding error, obtain the Signal to Interference plus Noise Ratio S3 of the second data flow receiving and be correctly decoded the required total Signal to Interference plus Noise Ratio S4 of described the second data flow;
Calculate the second required re-transmission power of described the second data flow of re-transmission according to described S3 and S4;
Send the second feedback message to described base station, in described the second feedback message, carry described second and retransmit power;
Receive base station and retransmit the second data flow sending, the second data flow of the second data flow receiving for the first time and base station re-transmission transmission is merged to decoding.
9. a base station, is characterized in that, comprising:
Data flow transmitting element, for sending the first data flow to terminal;
Message sink unit, the first feedback message returning for receiving described terminal, in described the first feedback message, carried terminal is correctly decoded the first required re-transmission power of described the first data flow;
Described data flow transmitting element is also in the time that described the first re-transmission power is less than descending total power and has second data flow that need to send to terminal, retransmit power with described first and retransmit and send the first data flow to described terminal, send second data flow with respect to the dump power of the first re-transmission power to described terminal with described descending total power.
10. base station according to claim 9, is characterized in that,
The second feedback message that described message sink unit also returns for receiving described terminal, in described the second feedback message, carried terminal is correctly decoded the second required re-transmission power of described the second data flow;
Described base station also comprises:
The first judging unit, for judging whether described the second re-transmission power equals zero;
The second judging unit, for being not equal at 1 o'clock at the second re-transmission power, further judges whether to exist the 3rd data flow that need to send to terminal;
Also in the time there is the 3rd data flow in described data flow transmitting element, retransmit power with described second and retransmit and send described the second data flow to described terminal, send described three data flow with respect to the described second dump power that retransmits power to described terminal with described descending total power;
Described data flow transmitting element, also in the time not there is not the 3rd data flow, retransmits and sends described the second data flow to terminal with descending total power.
11. 1 kinds of terminals, is characterized in that, comprising:
Data flow receiving element, the first data flow sending for receiving base station;
Data flow decoding unit, for decoding to described the first data flow;
The first acquiring unit, in the time decoding described the first traffic error, obtains the Signal to Interference plus Noise Ratio S1 of the first data flow receiving and is correctly decoded the required total Signal to Interference plus Noise Ratio S2 of described the first data flow;
The first computing unit, for calculating the first required re-transmission power of described the first data flow of re-transmission according to described S1 and S2;
Message sending unit, for sending the first feedback message to described base station, carries described first and retransmits power in described the first feedback message;
Described data flow receiving element also retransmits for receiving base station the first data flow and the second data flow that send;
Described data flow decoding unit, also for the second data flow receiving is decoded, merges decoding to the first data flow of the first data flow receiving for the first time and base station re-transmission transmission.
12. terminals according to claim 11, is characterized in that, also comprise:
Second acquisition unit, in the time that described the second data flow is carried out to decoding error, obtains the Signal to Interference plus Noise Ratio S3 of the second data flow receiving and is correctly decoded the required total Signal to Interference plus Noise Ratio S4 of described the second data flow;
The second computing unit, for calculating the second required re-transmission power of described the second data flow of re-transmission according to described S3 and S4;
Described message sending unit, also for sending the second feedback message to described base station, is carried described second and is retransmitted power in described the second feedback message;
Described data flow receiving element also retransmits for receiving base station the second data flow sending;
Described data flow decoding unit is also for merging decoding to the second data flow of the second data flow receiving for the first time and base station re-transmission transmission.
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| CN201010113714.5A CN102149132B (en) | 2010-02-04 | 2010-02-04 | Method, base station and terminal for retransmitting data |
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| CN201010113714.5A CN102149132B (en) | 2010-02-04 | 2010-02-04 | Method, base station and terminal for retransmitting data |
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| CN102149132A CN102149132A (en) | 2011-08-10 |
| CN102149132B true CN102149132B (en) | 2014-12-03 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1411182A (en) * | 2001-09-27 | 2003-04-16 | 华为技术有限公司 | Power control method based on mixed automatic retransmission mechanism |
| 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 |
| CN1846365A (en) * | 2003-09-03 | 2006-10-11 | Lg电子株式会社 | Method of controlling transmission power of retransmission packet and mobile terminal using the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1411182A (en) * | 2001-09-27 | 2003-04-16 | 华为技术有限公司 | Power control method based on mixed automatic retransmission mechanism |
| CN1846365A (en) * | 2003-09-03 | 2006-10-11 | Lg电子株式会社 | Method of controlling transmission power of retransmission packet and mobile terminal using the same |
| 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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