CN101272229A - Automatic retransmission method and radio communication system and base station - Google Patents
Automatic retransmission method and radio communication system and base station Download PDFInfo
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- CN101272229A CN101272229A CNA2007100900414A CN200710090041A CN101272229A CN 101272229 A CN101272229 A CN 101272229A CN A2007100900414 A CNA2007100900414 A CN A2007100900414A CN 200710090041 A CN200710090041 A CN 200710090041A CN 101272229 A CN101272229 A CN 101272229A
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Abstract
The invention discloses an automatic retransmission method as well as a wireless commutation system and base station. A user terminal can feed back the result that whether the data received by each data flow in the interior is correct or not to the base station by utilizing the invention; the base station transmits data to the user terminal according to a preset automatic retransmission mode between a plurality of user terminals and an automatic retransmission mode between a plurality of data flows of each user terminal as well as the feed back result. The invention can be utilized to more remarkably improve the frequency spectrum utilization rate of the system and further ensure the reliability of data transmission.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to automatic retransmission method and wireless communication system and base station.
Background technology
Multiple-input and multiple-output (Multiple Input and Multiple Output, MIMO) technology is meant at transmitting terminal and receiving terminal and uses a plurality of transmitting antennas and reception antenna respectively, signal transmits and receives by a plurality of antennas of transmitting terminal and receiving terminal, thereby improves each quality of services for users.The MIMO technology can improve the availability of frequency spectrum greatly for traditional single antenna, and the data service of higher rate can be transmitted in the system that makes under the limited wireless frequency band.
Throughput for further increase system, transmitting terminal adopts h-arq (Hybrid Automatic Repeat reQuest simultaneously in the prior art when a plurality of user terminals send signal, HARQ) technology, this technology have the characteristics such as simple, that lower and throughput gain is remarkable to requirement on devices that realize.In the prior art,, comprise blanking pattern (Blanking) and non-blanking pattern (Non-Blanking) to the HARQ mode of data flow transmission.Adopt the system of blanking pattern, when partial data stream makes a mistake in a plurality of data flow of transmission, can before all data flow transmission are correct, not send any new data; And adopt the system of non-blanking pattern, and each data flow independent transmission, to the new data of correct data flow transmission, and the data before the data flow of mistake is retransmitted.The pattern of two kinds of system transmissions data flow respectively has characteristics, under the condition of common receiver, the blanking pattern scheduling is fairly simple but throughput is lower, non-blanking pattern dispatches complexity but throughput is bigger, but when adopting comparatively complicated serial interference elimination Minimum Mean Square Error (SIC-MMSE) receiver, the throughput of system of two kinds of retransmission mode is more or less the same.
But make system under the limited wireless frequency band, can transmit the problem of the data service of higher rate at what kind of automatic re-transmission pattern of employing, prior art only rests under the situation of Single User MIMO and multi-user's single data stream, and in order to obtain the higher availability of frequency spectrum, system need support the multiple users MIMO technology of a plurality of data flow of each user terminal; Meanwhile, for the reliability that guarantees to transmit, the automatic retransmission technique under a plurality of data flow situations of multiple users also just seems particularly important, in the prior art, how system is used automatic re-transmission pattern send the problem of a plurality of data flow transmission data services, do not relate to as yet to multiple users.
Summary of the invention
The embodiment of the invention provides a kind of automatic retransmission method and wireless communication system and base station, the automatic re-transmission in the time of can being implemented in multiple users MIMO under the situation of each user terminal multiple data stream.
The purpose of the embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of automatic retransmission method, comprising:
The base station sends business datum to a plurality of user terminals; Wherein, described base station sends a plurality of data flow to each user terminal;
User terminal judges whether the business datum that each data flow receives is correct, and judged result is fed back to the base station;
The base station is according to the described feedback result that receives, and the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between a plurality of user terminals that preset, to user terminal to transmit data.
The embodiment of the invention also provides a kind of base station, comprising: data transmission unit, feedback signal receiving element, processing unit;
Data transmission unit is used for sending business datum to user terminal, wherein, send a plurality of data flow, and receive the mode that processing unit sends to user terminal to transmit data to each user terminal, according to this mode to user terminal to transmit data;
The feedback signal receiving element is used to receive the signal about this data flow received data correctness that each data flow of user terminal is fed back, and this feedback result is sent to processing unit;
Processing unit, be used for according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset, decision is to the mode of user terminal to transmit data, and this determination result is sent to data transmission unit.
The embodiment of the invention also provides a kind of wireless communication system, comprising: base station and user terminal;
The base station, be used for sending business datum to user terminal, wherein, the base station sends a plurality of data flow to each user terminal, and according to the automatic re-transmission pattern between re-transmission pattern and inner each data flow of user terminal automatically between the result of user terminal feedback and the user terminal that presets, to user terminal to transmit data;
User terminal is used to receive the data that the base station sends, and judges whether the described business datum of inner each data flow reception of user terminal is correct, and judged result is fed back to the base station.
The technical scheme that the above embodiment of the invention provided as can be seen, the base station is according to the result of the data correctness that receives about each data flow of user terminal inside of the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal and received user terminal feedback automatically between a plurality of user terminals that preset, to user terminal to transmit data, with only compare in the prior art at the technology of a plurality of user terminal individual traffics or unique user terminal multiple data stream, the technical scheme that the embodiment of the invention provided can improve the availability of frequency spectrum of system more significantly, has also further guaranteed reliability of data transmission.
Description of drawings
The flow chart of the automatic retransmission method that Fig. 1 provides for the embodiment of the invention one;
The structure chart of the base station that Fig. 2 provides for the embodiment of the invention two;
The structure chart of the wireless communication system that Fig. 3 provides for the embodiment of the invention three.
Embodiment
For the technical scheme that makes the embodiment of the invention and advantage are clear and definite more in detail, the embodiment of the invention is described in detail below in conjunction with accompanying drawing.
Embodiment one:
The embodiment of the invention provides a kind of automatic retransmission method, and referring to accompanying drawing 1, this method comprises:
Step 101: the base station sends business datum to a plurality of user terminals;
Wherein, the base station sends business datum simultaneously to a plurality of user terminals in each running time-frequency resource;
Wherein, described base station sends a plurality of data flow to each user terminal;
Step 102: user terminal judges whether the business datum of inner each data flow that is received is correct, and judged result is fed back to the base station;
Wherein, user terminal judges the business datum of each data flow that the base station sends to of receiving, and is correct as if the data of this data flow, then user terminal to base station feedback about the affirmation signal of this data flow (ACKnowledgment, ACK); If the error in data of this data flow, then user terminal to base station feedback about the non-confirmation signal of this data flow (Negative ACKnowledgment, NACK);
Step 103: the base station is according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset, to user terminal to transmit data;
Wherein, if the automatic re-transmission pattern between the multiple users that presets is non-blanking pattern, the automatic re-transmission pattern between a plurality of data flow of each user terminal that presets is a blanking pattern, and then step 103 specifically comprises:
If the result of certain customers' terminal feedback is confirmation signal ACK, among the result of certain customers' terminal feedback non-confirmation signal NACK is arranged, then new data is continued to send to the user terminal that feedback result is ack signal in the base station; The base station has the data flow of feedback NACK signal of the user terminal inside of NACK signal to resend the data of previous transmission failure in feedback result, reaches the maximum threshold that preset to base station feedback about the ack signal or the base station retransmission data number of times of this data flow until user terminal;
If the user terminal inside of NACK signal is arranged in the feedback result, the data flow that the feeding back ACK signal is arranged, then the data flow to this user terminal internal feedback ack signal stops to send new data, reaches the maximum threshold that presets until this user terminal to the ack signal or the base station retransmission data number of times of its all internal data flow of base station feedback; Its base station is to the situation such as the following table 1 of user terminal to transmit data:
Table 1
Wherein, if the automatic re-transmission pattern between the multiple users that presets is a blanking pattern, the automatic re-transmission pattern between a plurality of data flow of each user terminal that presets is non-blanking pattern, and then step 103 specifically comprises:
If the result of certain customers' terminal feedback is ack signal, among the result of certain customers' terminal feedback the NACK signal is arranged, then the base station stops to send new data to the user terminal that feedback result is ack signal, reaches the maximum threshold that presets until user terminal to the ack signal or the base station retransmission data number of times of its inner all data flow of base station feedback; The base station has the data flow of feedback NACK signal of the user terminal inside of NACK signal to resend the data of previous transmission failure in feedback result, reaches the maximum threshold that presets until this user terminal to the ack signal or the base station retransmission data number of times of this data flow data of base station feedback;
If the user terminal inside of NACK signal is arranged in the feedback result, the data flow of feeding back ACK signal is arranged, then new data is continued to send to the data flow of this user terminal internal feedback ack signal in the base station; Its base station is to the situation such as the following table 2 of user terminal to transmit data:
Table 2
Wherein, if the automatic re-transmission pattern between the multiple users that presets is non-blanking pattern, the automatic re-transmission pattern between a plurality of data flow of each user terminal that presets also is non-blanking pattern, and then step 103 specifically comprises:
If the result of certain customers' terminal feedback is ack signal, among the result of certain customers' terminal feedback the NACK signal is arranged, then the base station is the data flow continuation transmission new data of ack signal to all feedback result; The base station resends the data that previous transmission is failed to the data flow of feedback NACK signal, reaches the maximum threshold that presets until user terminal to the affirmation signal or the base station retransmission data number of times of this data flow data of base station feedback; Its base station is to the situation such as the following table 3 of user terminal to transmit data:
Table 3
Wherein, if the automatic re-transmission pattern between the multiple users that presets is a blanking pattern, the automatic re-transmission pattern between the inner a plurality of data flow of the user terminal that presets also is blanking pattern, and then step 103 specifically comprises:
If certain customers' terminal is ack signal to the base station feedback result, among the result of certain customers' terminal feedback the NACK signal is arranged, then the base station is that the data flow of ack signal stops to send new data to all feedback result, reaches the maximum threshold that presets until all user terminals to the ack signal or the base station retransmission data number of times of its inner all data flow data of base station feedback; The base station resends the data that previous transmission is failed to the data flow of feedback NACK signal, reaches the maximum threshold that presets until user terminal to the affirmation signal or the base station retransmission data number of times of this data flow data of base station feedback; Its base station is to the situation such as the following table 4 of user terminal to transmit data:
Table 4
Wherein, above-described internal data flow is the data flow that each user terminal received;
Wherein, the maximum threshold of the described base station retransmission data that presets comprises that the base station retransmits the maximum times of business datum and the maximum times that retransmits business datum to each data flow to each user terminal; Wherein, can equate also can be unequal for two maximum thresholds.
Embodiment two:
Referring to Fig. 2, the embodiment of the invention also provides a kind of base station, comprising: data transmission unit, feedback signal receiving element, processing unit;
Wherein, data transmission unit 201 is used for sending business datum to user terminal, and receives the mode to user terminal to transmit data that processing unit sends, according to this mode to user terminal to transmit data;
Wherein, data transmission unit sends business datum simultaneously to a plurality of user terminals in each running time-frequency resource;
Wherein, described data transmission unit sends a plurality of data flow to each user terminal;
Feedback signal receiving element 202 is used to receive the signal of each data flow data correctness of user terminal feedback, and this feedback result is sent to processing unit;
Wherein, automatic re-transmission pattern can be blanking pattern or non-blanking pattern between a plurality of user terminals that preset, and the automatic re-transmission pattern between inner each data flow of the described user terminal that presets can be blanking pattern or non-blanking pattern.
Embodiment three:
Referring to Fig. 3, the embodiment of the invention also provides a kind of wireless communication system, and this system comprises: base station, user terminal;
Base station 301, be used for sending business datum to user terminal, and according to the automatic result of the automatic re-transmission pattern between re-transmission pattern and inner each data flow of user terminal and the user terminal feedback that received between the user terminal that presets, to user terminal to transmit data;
Wherein, the base station sends business datum simultaneously to a plurality of user terminals in each running time-frequency resource; The base station sends a plurality of data flow to each user terminal;
Wherein, described base station comprises: data transmission unit, feedback signal receiving element, processing unit;
Wherein, data transmission unit 3011 is used for sending business datum to user terminal, and receives the mode to user terminal to transmit data that processing unit sends, according to this mode to user terminal to transmit data;
Wherein, described data transmission unit sends a plurality of data flow to each user terminal;
Feedback signal receiving element 3012 is used to receive the signal of each data flow data correctness of user terminal feedback, and this feedback result is sent to processing unit;
Processing unit 3013, be used for according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset, decision is to the mode of user terminal to transmit data, and this determination result is sent to data transmission unit;
Wherein, automatic re-transmission pattern can be blanking pattern or non-blanking pattern between a plurality of user terminals that preset, and the automatic re-transmission pattern between inner each data flow of the described user terminal that presets can be blanking pattern or non-blanking pattern;
Wherein, user terminal 302 is used to receive the data that the base station sends, and judges whether the described business datum of inner each data flow reception of user terminal is correct, and judged result is fed back to the base station.
The technical scheme that the above embodiment of the invention provided as can be seen, the base station according to described preset to the automatic result of the data correctness that receives about each data flow of user terminal inside of the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal and received user terminal feedback between a plurality of user terminals, to user terminal to transmit data, with only compare in the prior art at the technology of a plurality of user terminal individual traffics or unique user terminal multiple data stream, the technical scheme that the embodiment of the invention provided can improve the availability of frequency spectrum of system more significantly, has also further guaranteed reliability of data transmission.
More than to a kind of automatic retransmission method and wireless communication system and base station that the embodiment of the invention provided, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. an automatic retransmission method is characterized in that, comprising:
The base station sends business datum to a plurality of user terminals; Wherein, described base station sends a plurality of data flow to each user terminal;
User terminal judges whether the business datum that each data flow receives is correct, and judged result is fed back to the base station;
The base station is according to the described feedback result that receives, and the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between a plurality of user terminals that preset, to user terminal to transmit data.
2. automatic retransmission method according to claim 1 is characterized in that:
Automatic re-transmission pattern is non-blanking pattern between the described a plurality of user terminals that preset, and automatic re-transmission pattern is a blanking pattern between a plurality of data flow of described each user terminal.
3. automatic retransmission method according to claim 2, it is characterized in that, described base station is according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset, to user terminal to transmit data, specifically comprise:
If the result of certain customers' terminal feedback is confirmation signal ACK, among the result of certain customers' terminal feedback non-confirmation signal NACK is arranged, then new data is continued to send to the user terminal that feedback result is ack signal in the base station; The base station has the data flow of feedback NACK signal of the user terminal inside of NACK signal to resend the data of previous transmission failure in feedback result, reaches the maximum threshold that preset to base station feedback about the ack signal or the base station retransmission data number of times of this data flow until user terminal;
If the user terminal inside of NACK signal is arranged in the feedback result, the data flow that the feeding back ACK signal is arranged, then the data flow to this user terminal internal feedback ack signal stops to send new data, reaches the maximum threshold that presets until this user terminal to the ack signal or the base station retransmission data number of times of its all internal data flow of base station feedback.
4. automatic retransmission method according to claim 1 is characterized in that:
Automatic re-transmission pattern is a blanking pattern between the described a plurality of user terminals that preset, and automatic re-transmission pattern is non-blanking pattern between a plurality of data flow of described each user terminal.
5. automatic retransmission method according to claim 4, it is characterized in that: described base station is according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset, to user terminal to transmit data, specifically comprise:
If the result of certain customers' terminal feedback is ack signal, among the result of certain customers' terminal feedback the NACK signal is arranged, then the base station stops to send new data to the user terminal that feedback result is ack signal, reaches the maximum threshold that presets until user terminal to the ack signal or the base station retransmission data number of times of its inner all data flow of base station feedback; The base station has the data flow of feedback NACK signal of the user terminal inside of NACK signal to resend the data of previous transmission failure in feedback result, reaches the maximum threshold that presets until this user terminal to the ack signal or the base station retransmission data number of times of this data flow data of base station feedback;
If the user terminal inside of NACK signal is arranged in the feedback result, the data flow of feeding back ACK signal is arranged, then new data is continued to send to the data flow of this user terminal internal feedback ack signal in the base station.
6. automatic retransmission method according to claim 1, its feature exists:
Automatic re-transmission pattern is non-blanking pattern between the described a plurality of user terminals that preset, and automatic re-transmission pattern is non-blanking pattern between a plurality of data flow of described each user terminal.
7. automatic retransmission method according to claim 6 is characterized in that:
Described base station, specifically comprises to user terminal to transmit data according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset:
If the result of certain customers' terminal feedback is ack signal, among the result of certain customers' terminal feedback the NACK signal is arranged, then the base station is the data flow continuation transmission new data of ack signal to all feedback result; The base station resends the data that previous transmission is failed to the data flow of feedback NACK signal, reaches the maximum threshold that presets until user terminal to the ack signal or the base station retransmission data number of times of this data flow data of base station feedback.
8. automatic retransmission method according to claim 1 is characterized in that:
Automatic re-transmission pattern is a blanking pattern between the described a plurality of user terminals that preset, and automatic re-transmission pattern is a blanking pattern between a plurality of data flow of described each user terminal.
9. automatic retransmission method according to claim 8 is characterized in that:
Described base station, specifically comprises to user terminal to transmit data according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset:
If certain customers' terminal is ack signal to the result of base station feedback, among the result of certain customers' terminal feedback the NACK signal is arranged, then the base station is that the data flow of ack signal stops to send new data to all feedback result, reaches the maximum threshold that presets until all user terminals to the ack signal or the base station retransmission data number of times of its inner all data flow data of base station feedback; The base station resends the data that previous transmission is failed to the data flow of feedback NACK signal, reaches the maximum threshold that presets until user terminal to the ACK or the base station retransmission data number of times of this data flow data of base station feedback.
10. according to claim 3 or 5 or 7 or 9 described automatic retransmission methods, it is characterized in that: the described maximum threshold that presets comprises: the base station is to the maximum times of each user terminal re-transmission business datum, and the maximum times that retransmits business datum to each data flow.
11. a base station is characterized in that, comprising: data transmission unit, feedback signal receiving element, processing unit;
Data transmission unit is used for sending business datum to user terminal, wherein, send a plurality of data flow, and receive the mode that processing unit sends to user terminal to transmit data to each user terminal, according to this mode to user terminal to transmit data;
The feedback signal receiving element is used to receive the signal about this data flow received data correctness that each data flow of user terminal is fed back, and this feedback result is sent to processing unit;
Processing unit, be used for according to the automatic re-transmission pattern between a plurality of data flow of re-transmission pattern and each user terminal automatically between the described feedback result that receives and a plurality of user terminals that preset, decision is to the mode of user terminal to transmit data, and this determination result is sent to data transmission unit.
12. base station according to claim 11 is characterized in that:
Automatic re-transmission pattern can be blanking pattern or non-blanking pattern between the described a plurality of user terminals that preset, and the automatic re-transmission pattern between inner each data flow of the described user terminal that presets can be blanking pattern or non-blanking pattern.
13. a wireless communication system is characterized in that, comprising: base station and user terminal;
The base station, be used for sending business datum to user terminal, wherein, the base station sends a plurality of data flow to each user terminal, and according to the automatic re-transmission pattern between re-transmission pattern and inner each data flow of user terminal automatically between the result of user terminal feedback and the user terminal that presets, to user terminal to transmit data;
User terminal is used to receive the data that the base station sends, and judges whether the described business datum of inner each data flow reception of user terminal is correct, and judged result is fed back to the base station.
14. wireless communication system according to claim 13 is characterized in that:
Automatic re-transmission pattern can be blanking pattern or non-blanking pattern between the described a plurality of user terminals that preset, and the automatic re-transmission pattern between inner each data flow of the described user terminal that presets can be blanking pattern or non-blanking pattern.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139208A1 (en) * | 2009-06-02 | 2010-12-09 | 中兴通讯股份有限公司 | Method and apparatus for data transmission |
| CN106060783A (en) * | 2015-04-10 | 2016-10-26 | 财团法人资讯工业策进会 | Single cell point to multi-points network system and data transmission method thereof |
| CN110383734A (en) * | 2017-03-23 | 2019-10-25 | 株式会社Ntt都科摩 | Data transmission method for uplink, data receiver method, user equipment and base station |
-
2007
- 2007-03-21 CN CNA2007100900414A patent/CN101272229A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139208A1 (en) * | 2009-06-02 | 2010-12-09 | 中兴通讯股份有限公司 | Method and apparatus for data transmission |
| CN106060783A (en) * | 2015-04-10 | 2016-10-26 | 财团法人资讯工业策进会 | Single cell point to multi-points network system and data transmission method thereof |
| CN110383734A (en) * | 2017-03-23 | 2019-10-25 | 株式会社Ntt都科摩 | Data transmission method for uplink, data receiver method, user equipment and base station |
| CN110383734B (en) * | 2017-03-23 | 2022-06-10 | 株式会社Ntt都科摩 | Data sending method, data receiving method, user equipment and base station |
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