CN101790195B - Multi-subframe integrated scheduling data transmission method - Google Patents
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Abstract
The embodiment of the invention discloses a multi-subframe integrated scheduling TTI bundling data transmission method, which comprises the following steps: user equipment (UE) transmits new data or retransmits data according to the received data scheduling information when the fact that a conflict between new data transmission and data retransmission exists in the UE is judged in terms of the data scheduling information and the feedback information indicating whether a base station receives uplink data accurately or not. By using the invention, the data transmission behavior of each UE is consistent, and the base station can control each UE effectively under the condition that the conflict between new data transmission and data retransmission exists at a UE side.
Description
Technical field
The present invention relates to the transmitting uplink data technical field of communication system, relate in particular to a kind of multi-subframe integrated scheduling data transmission method.
Background technology
For the transmitting uplink data of wireless communication system, because be subject to the transmitting power of subscriber equipment (UE), if UE is under the more abominable communication environment, the difficult quality guarantee of its transmitting uplink data then.Therefore, introduce multi-subframe integrated scheduling (TTIbundling) data transmission method in Long Term Evolution (LTE) communication system, be used to guarantee the quality of transmitting uplink data, improved the coverage of transmitting uplink data.
TTI bundling data transmission method has following characteristic:
(1) sends the different redundancy versions of same transmission block by a plurality of continuous TTI, in other words, in a plurality of continuous TTI, carry out HARQ automatically and retransmit.Said a plurality of continuous TTI is called a bundle.
(2) bundle are independently Resource Block; The HARQ process of a corresponding TTI bundling only needs a base station transmission data dispatch signaling (PDCCH message) and expression base station whether correctly to receive the feedback signaling (ACK/NACK message) of upstream data.
(3) for each bundle, ACK/NACK message is sent in the base station in last TTI of this bundle.
(4) when UE needs data retransmission, the position of UE data retransmission is corresponding with first TTI of bundle, and retransmission time interval is 2 times of single sub-frame Transmission Time Interval.
Fig. 1 is that frequency division multiplexing in the prior art (FDD) system adopts the mixing of TTI bundling data transmission method transmission data to retransmit (Hybrid Automatic Repeat Request, HARQ) timing relation figure of feedback and re-transmission automatically.
As shown in Figure 1, in this FDD system, three continuous TTI are bound a bundle; Be used to transmit identical data, ACK/NACK message is sent to last TTI among the bundle in the base station, and UE receives the ACK/NACK message that send the base station; If what receive is NACK message, show that then the base station does not have correctly to receive the data that UE sends, UE needs data retransmission; So, suppose that first subframe that the UE last time sends data place bundle to the base station is numbered k, then; As shown in Figure 1, UE will retransmit the data of once sending to the base station in the position of k+2*HARQ RTT.
At present, in the LTE communication system, according to the difference of configuration mode, it supports that the number of HARQ process is also different.Under configuration 0 pattern, support 7 HARQ processes, under configuration 1 pattern, support 4 HARQ processes, under configuration 6 patterns, support 6 HARQ processes.When the LTE system adopts TTI bundling data transmission method; UE binds 4 continuous HARQ processes the HARQ process of a TTI bundling; Be used to transmit the different redundancy versions of same data block, different TTI bundling pattern (pattern) that different configuration modes is corresponding.
Below in conjunction with Fig. 2, Fig. 3 and Fig. 4 the TTI bundling pattern under the different configuration modes is introduced.
In Fig. 2, Fig. 3 and Fig. 4, when not adopting TTI bundling data-transmission mode, HARQ process that each up TTI is corresponding.
Fig. 2 is the TTI bundling pattern sketch map under configuration 0 pattern.
As shown in Figure 2; Under configuration 0 pattern, when adopting TTI bundling data transmission method, per 4 up TTI form the HARQ process of a TTI bundling; Support the HARQ process of 3 TTIbundling altogether, and vacate two processes in per 14 HARQ processes and be not used.
Fig. 3 is the TTI bundling pattern sketch map under configuration 1 pattern.
As shown in Figure 3, under configuration 1 pattern, when adopting TTI bundling data transmission method, per 4 up TTI form the HARQ process of a TTI bundling, support the HARQ process of 2 TTIbundling altogether.
Fig. 4 is the TTI bundling pattern sketch map under configuration 6 patterns.
As shown in Figure 4, under configuration 6 patterns, when adopting TTI bundling data transmission method, per 4 up TTI form the HARQ process of a TTI bundling, support the HARQ process of 2 TTIbundling altogether.
To the HARQ process of each TTI bundling, if the base station has correctly received the upstream data of UE in the in-process transmission of the HARQ of this TTI bundling, then send ACK message to UE, otherwise, then send NACK message to UE.The base station can also be through sending data dispatch order (PDCCH message) to UE; Indicate UE to send new data or data retransmission; Wherein, carry UE in the PDCCH message and send the moment of data, the resource that takies and new data indication (New DataIndication, NDI) information.
Wherein, the value of NDI information can be 0 in the PDCCH message, also can be 1; Its usage is: if the last time NDI information that UE receives is identical with the preceding NDI information that once receives; Then expression needs the UE data retransmission, otherwise then expression needs UE to send new data.If base station side has correctly received the upstream data that UE sends, then ACK message is sent to UE on the one hand in the base station, on the other hand; If PDCCH message is sent to UE in the base station, then the value of the NDI information in this PDCCH message is overturn in the base station, promptly; If the original value of NDI information is 0; Then the value upset with NDI information is 1, if the original value of NDI information is 1, then the value upset with NDI information is 0.
When communication system adopted TTI bundling data transmission method, the base station can be according to the TTI bundling pattern of the current employings of change such as resource operating position.The base station is through sending the TTI bundling pattern of the current employing of PDCCH message alteration to UE.Particularly; After UE received PDCCH message, separated preset time began the HARQ process of next TTI bundling at interval, if the base station keeps the TTI bundling pattern of current employing constant; Then the base station can be according under the current TTI bundlingpattern; The moment that the HARQ process of next TTI bundling begins, calculate to send moment of PDCCH message, calculate corresponding the time engrave and send PDCCH message; If the base station will change the TTI bundling pattern of current employing, then PDCCH message can be sent to UE at any time in the base station.
UE receives from ACK message, NACK message and the PDCCH message of base station and resolves.If what UE parsed the base station transmission is ACK message; Then UE is under the situation that receives PDCCH message; According to the moment and the resource of PDCCH message indication, send new data to the base station, under the situation that does not receive PDCCH message; According to the shared resource of last time transmission data, at the in-process transmission new data of the HARQ of next TTIbundling.If what UE parsed the base station transmission is NACK message; Then UE is under the situation that receives PDCCH message; According to the NDI information in the PDCCH message, judgement is to send new data or to the base station data retransmission to the base station, then transmission new data or data retransmission on moment of PDCCH message indication and resource; UE is under the situation that does not receive PDCCH message, at the in-process data retransmission of the HARQ of next TTI bundling.
Thus it is clear that,, when this can not correctly resolve ACK message that base station side sends with NACK message at UE, can cause UE side transmission new data and the afoul situation of data retransmission because the TTI bundling pattern that UE adopts in the prior art is variable.
For example, referring to Fig. 5, Fig. 5 is that the UE mistake is resolved the transmission new data that ACK message causes and the sketch map of the afoul situation of data retransmission.
In Fig. 5, ACK message is sent to UE in the base station, and expression correctly receives the upstream data that this UE sends, and sends PDCCH message with the scheduling new data to this UE.The moment that UE confirms to send upstream data according to this PDCCH message next time is inconsistent with the moment of sending upstream data of the TTI bundling pattern decision of original employing next time; Judge that then current TTI bundling pattern is changed; Need send new upstream data to the base station; UE then judges needs to the base station data retransmission according to the NACK message that parses; In this case, UE sends new data and data retransmission clashes, and can't confirm to send new data or data retransmission to the base station.Send the situation of new data and data retransmission conflict to the UE side; Also do not provide the concrete grammar that UE sends data in the prior art; Cause among each UE that the base station controls; The behavior of each UE transmission data of transmission new data and data retransmission conflict is inconsistent, and the base station is to the Control Failure of each UE.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide a kind of multi-subframe integrated scheduling data transmission method, makes the UE side send under the situation of new data and data retransmission conflict, and each UE sends the behavior unanimity of data, and each UE can effectively be controlled in the base station.
For achieving the above object, the technical scheme of the embodiment of the invention specifically is achieved in that
A kind of multi-subframe integrated scheduling TTI bundling data transmission method, this method comprises:
Whether user equipment (UE) correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; When judging the conflict of this UE existence transmission new data and data retransmission, this UE sends new data or data retransmission according to the data dispatch message that receives.
Visible by technique scheme; Because whether the present invention correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; Judge whether UE exists the conflict of sending new data and data retransmission; When having said conflict, clear and definite this UE sends new data or data retransmission according to the data dispatch message that receives, thereby makes the UE side send under the situation that new data and data retransmission conflict; Each UE sends the behavior unanimity of data, and each UE can effectively be controlled in the base station.
Description of drawings
Fig. 1 is that frequency division multiplexing in the prior art (FDD) system adopts the HARQ feedback of TTI bundling data transmission method transmission data and the timing relation figure that retransmits;
Fig. 2 is the TTI bundling pattern sketch map under configuration 0 pattern;
Fig. 3 is the TTI bundling pattern sketch map under configuration 1 pattern;
Fig. 4 is the TTI bundling pattern sketch map under configuration 6 patterns;
Fig. 5 is that the UE mistake is resolved the transmission new data that ACK message causes and the sketch map of the afoul situation of data retransmission;
Fig. 6 is the data dispatch message that UE receives in the first embodiment of the invention and representes whether the base station correctly receives the timing diagram of the feedback message of upstream data;
Fig. 7 is the data dispatch message that UE receives in the second embodiment of the invention and representes whether the base station correctly receives the timing diagram of the feedback message of upstream data;
Fig. 8 is the data dispatch message that UE receives in the third embodiment of the invention and representes whether the base station correctly receives the timing diagram of the feedback message of upstream data.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
Core concept of the present invention is: whether UE correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; Judge whether UE exists the conflict of sending new data and data retransmission; Judging when having said conflict; This UE sends new data or data retransmission according to the data dispatch message that receives, and is not judging when having said conflict, and this UE is according to the NDI information transmission new data or the data retransmission that carry in the data dispatch message that receives.
Said data dispatch message can be but be not limited to PDCCH message; The feedback message whether said expression base station correctly receives upstream data can include but not limited to: the expression base station correctly receives the ACK message of upstream data and the NACK message that the expression base station does not have correctly to receive upstream data.
Below, according to whether judging the conflict of UE existence transmission new data and data retransmission, and do not judge the different situations that conflict comprised that UE exists transmission new data and data retransmission, lift embodiment respectively the present invention explained:
In following embodiment, be that the feedback message whether PDCCH message, said expression base station correctly receive upstream data comprises that ACK message and NACK message are example, explain each embodiment with said data dispatch message.
First embodiment
In the present embodiment; Whether UE correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; Judge this UE and have the conflict of sending new data and data retransmission, this UE sends new data or data retransmission according to the data dispatch message that receives.
Referring to Fig. 6, Fig. 6 is the data dispatch message that UE receives in the first embodiment of the invention and representes whether the base station correctly receives the timing diagram of the feedback message of upstream data.
Among Fig. 6, UE receives ACK message, and this ACK message is resolved, and owing to reasons such as parse errors, the message that UE parses is NACK message, and then UE confirms second moment of automatic data retransmission according to the TTIbundling pattern of current employing; And; UE receives PDCCH message, confirms that according to PDCCH message UE sends first moment of data, and is as shown in Figure 6; When first constantly with second not simultaneously not constantly; The TTI bundling pattern that UE can judge current employing is changed, and then no matter the value of the NDI information in the PDCCH message is 0 or 1, all need send new data according to PDCCH message.In this case, UE goes out the automatic data retransmission of needs according to the NACK message determining that parses, and then judges needs according to PDCCH message and sends new data, that is to say that UE sends new data and data retransmission conflict.To this, the method that the present invention adopts is, no matter the value of the NDI information in the PDCCH message is 0 or 1, and UE all sends new data according to PDCCH message, and it is consistent that this can guarantee that each UE sends behaviors of data, and each UE can effectively be controlled in the base station.
Second embodiment
In the present embodiment; Whether UE correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; When not judging the conflict of this UE existence transmission new data and data retransmission, UE sends new data or data retransmission according to the NDI information of carrying in the data dispatch message that receives.
Referring to Fig. 7, Fig. 7 is the data dispatch message that UE receives in the second embodiment of the invention and representes whether the base station correctly receives the timing diagram of the feedback message of upstream data.
The difference of Fig. 7 and Fig. 6 is; First moment that UE determines is constantly identical with second; Then UE can't judge the conflict whether this UE exists transmission new data and data retransmission; In this case, UE confirms that according to the NDI information in the PDCCH message sending new data still is the transmission data retransmission.Particularly, if the current NDI value of information is identical with the last NDI value of information, then UE sends data retransmission, if the current NDI value of information with respect to the NDI value of information of last time upset has taken place, promptly becomes 1 or become 0 by 1 by 0, and then UE sends new data.
The 3rd embodiment
In the present embodiment; Whether UE correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; When not judging the conflict of this UE existence transmission new data and data retransmission, UE sends new data or data retransmission according to the NDI information of carrying in the data dispatch message that receives.
Referring to Fig. 8, Fig. 8 is the data dispatch message that UE receives in the third embodiment of the invention and representes whether the base station correctly receives the timing diagram of the feedback message of upstream data.
The difference of Fig. 8 and Fig. 7 is that the base station is a NACK message to the UE transmission, but owing to reasons such as UE parse errors, the message that UE parses is ACK message.In this case, if UE has received PDCCH message, then UE confirms that according to the NDI information in the PDCCH message sending new data still is the transmission data retransmission, if UE does not receive PDCCH message, then UE does not send new data.
Visible by technique scheme; Because the present invention before UE sends data, judges at first whether UE exists the conflict of sending new data and data retransmission, according to whether there being said conflict; Adopt different processing modes, make that the behavior of UE transmission data is more reasonable.And; Since clear and definite when UE at new data when appearance conflicts with data retransmission; Send data according to PDCCH message; Make that the behavior of each UE still can be consistent, whether even if correctly receive in the expression that UE sends the base station under the situation of message parse mistake of upstream data, UE still can effectively be controlled in the base station.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. multi-subframe integrated scheduling TTI bundling data transmission method is characterized in that this method comprises:
Whether user equipment (UE) correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; When judging the conflict of this UE existence transmission new data and data retransmission, this UE sends new data or data retransmission according to the data dispatch message that receives;
Wherein, said UE is according to the data dispatch message that receives and represent whether the base station correctly receives the feedback message of upstream data, judges this UE and exists the conflict of sending new data and data retransmission to comprise:
UE confirms that according to the data dispatch message that receives UE sends first moment of data; TTI bundling type pattern according to current employing confirms that UE sends second moment of data; And UE resolves the said feedback message that receives, and does not correctly receive upstream data if analysis result is the base station; And first is constantly different with second constantly, then judge this UE and have the conflict of sending new data and data retransmission.
2. the method for claim 1 is characterized in that, said this UE sends new data according to the data dispatch message that receives or data retransmission comprises:
Correctly do not receive upstream data if analysis result is the base station, and first moment is constantly different with second, then UE is according to the data dispatch message transmission new data that receives.
3. method as claimed in claim 2; It is characterized in that; This method further comprises: correctly do not receive upstream data if analysis result is the base station; And first is constantly different with second constantly, and UE sends new data according to the data dispatch message that receives, and then UE empties the data among the former hybrid automatic repeat request (HARQ) buffer HARQ buffer.
4. the method for claim 1; It is characterized in that; This method further comprises: whether UE correctly receives the feedback message of upstream data according to data dispatch message that receives and expression base station; When not judging the conflict of this UE existence transmission new data and data retransmission, UE sends new data or data retransmission according to the new data indication NDI information of carrying in the data dispatch message that receives.
5. method as claimed in claim 4 is characterized in that,
Said this UE that do not judge exists the conflict of sending new data and data retransmission to comprise:
UE confirms that according to the data dispatch message that receives UE sends first moment of data; TTI bundling type pattern according to current employing confirms that UE sends second moment of data; First when constantly constantly identical, do not judge the conflict that this UE exists transmission new data and data retransmission with second;
Perhaps,
UE resolves the feedback message whether the expression base station that receives correctly receives upstream data, if analysis result is not then judged this UE and had the conflict of sending new data and data retransmission for the correct feedback message that receives upstream data of expression.
6. method as claimed in claim 5 is characterized in that,
Said UE sends new data according to the NDI information of carrying in the data dispatch message that receives or data retransmission comprises:
When new data was sent in said NDI information indication, UE sent new data, and when data retransmission was sent in said NDI information indication, UE sent data retransmission.
7. method as claimed in claim 6 is characterized in that, this method further comprises:
If UE does not receive data dispatch message, then UE does not send new data.
8. like the described method of the arbitrary claim of claim 1 to 7, it is characterized in that,
Said data dispatch message is PDCCH message;
The feedback message whether said expression base station correctly receives upstream data comprises: the ACK message of replying that the expression base station correctly receives upstream data does not have the correct non-NACK of the replying message that receives upstream data with the expression base station.
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| WO2013055128A2 (en) * | 2011-10-11 | 2013-04-18 | 엘지전자 주식회사 | Bundling scheduling method in wireless access system and apparatus therefor |
| CN103107874B (en) * | 2011-11-14 | 2016-06-29 | 华为技术有限公司 | A kind of method and apparatus sending data block |
| CN103139923A (en) * | 2011-11-30 | 2013-06-05 | 华为技术有限公司 | Method and device for transmission of multiple subframe scheduling signaling |
| CN103378932B (en) * | 2012-04-26 | 2016-08-10 | 华为技术有限公司 | Data transmission method, subscriber equipment and base station |
| CN103384177B (en) * | 2012-05-02 | 2017-06-20 | 华为技术有限公司 | Data pack transmission method and system, user equipment and base station |
| CN103546253B (en) * | 2012-07-09 | 2018-05-04 | 中兴通讯股份有限公司 | A kind of data transmission method and system |
| CN103873214B (en) * | 2012-12-14 | 2017-12-19 | 电信科学技术研究院 | A kind of data transmission method and device |
| CN103974438B (en) * | 2013-01-25 | 2018-06-19 | 成都鼎桥通信技术有限公司 | Semi-static scheduling method and user equipment |
| US9444586B2 (en) * | 2013-10-07 | 2016-09-13 | Qualcomm Incorporated | TTI-bundling and SPS operation in LTE TDD |
| JP6562582B2 (en) | 2015-09-30 | 2019-08-21 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | Acknowledgment indication method and associated device for data transmission |
| CN107566096A (en) * | 2016-06-30 | 2018-01-09 | 北京华为数字技术有限公司 | A kind of terminal-to-terminal service D2D communication means, relevant device and system |
| CN107733586A (en) * | 2016-08-12 | 2018-02-23 | 中兴通讯股份有限公司 | A kind of uplink retransmission method, base station, UE and system |
| WO2020252708A1 (en) * | 2019-06-19 | 2020-12-24 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device, and network device |
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