CN101296061A - Uplink data transmission method of LTE TDD system - Google Patents
Uplink data transmission method of LTE TDD system Download PDFInfo
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- CN101296061A CN101296061A CNA2007101030432A CN200710103043A CN101296061A CN 101296061 A CN101296061 A CN 101296061A CN A2007101030432 A CNA2007101030432 A CN A2007101030432A CN 200710103043 A CN200710103043 A CN 200710103043A CN 101296061 A CN101296061 A CN 101296061A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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Abstract
The invention discloses an uplink data transmitting method in an LTE TDD system. The method comprises the steps: step (S302) a terminal transmits the uplink data; step (S304), a base station receives the data at expected time, transmits a feedback message to the terminal according to receiving result and confirms whether to transmit uplink authorization indication signaling to the terminal according to the receiving result and preset transmitting conditions; and step (S306), the terminal detects the fed back message and the uplink authorization indication signaling, and correspondingly transmits the uplink data according to the detecting result. The improved HARQ technical proposal of the invention can effectively reduce the expenses for control without influencing the throughput of a system.
Description
Technical field
The present invention relates to the communications field, and especially, relate to the uplink data transmission method in a kind of LTE TDD (time division duplex of third generation collaborative project Long Term Evolution) system.
Background technology
Fig. 1 is the structured flowchart of LTE TDD system.As shown in Figure 1, LTE TDD system is mainly by terminal, and base station and core net are formed.The connection that can have as required, logic or physics between the base station.The network of being made up of the base station is called wireless access network (RAN), is responsible for the Access Layer affairs, for example, and the management of Radio Resource; The Radio Resource of up-downgoing is responsible for scheduling by the mode of shared channel by the base station.The base station is connected with core net, and each base station can be connected with one or more than one core net node (CN).Core net is responsible for the Non-Access Stratum affairs, for example, and charging, location management etc.Terminal is meant the equipment that can carry out communication with network, for example, and mobile phone or notebook computer etc.Each terminal only is connected to a base station in the network usually on up direction.
In addition, in existing LTE TDD system,, normally adopt the mode of base station scheduling to control the uplink and downlink transmission of different terminals, to improve channel utilization for the uplink and downlink shared channel.
The optional frame structure (Alternative framestructure) of LTE TDD system has been shown among Fig. 2.As shown in Figure 2, the optional frame structure of LTE system has determined that the base station must be a uplink and downlink dispatching cycle with field (5ms).A UL/DL (up/descending) switching point can be arranged, but the switching point position can be dynamically to adjust in the cycle with the field according to the load condition of system's uplink and downlink after subframe #1.Regulation according to 3GPP RAN WG1 (Radio Access Network first working group), LTE FDD system adopts synchronous hybrid automatic repeat request (HARQ) mode in uplink, promptly, if the terminal upstream data sends unsuccessful, to behind Fixed Time Interval, resend 1 just now data, up to success or reach maximum number of times of transmission and abandon.It mainly is to carry out clear and definite mandate indication in order HARQ not to be retransmitted that LTE FDD system adopts synchronous HARQ, to reduce the control signaling.
Yet, for LTE TDD system, from optional frame structure we as can be seen, the Fixed Time Interval that synchronous HARQ is retransmitted can not guarantee in some cases, because the UL/DL of LTETDD system need dynamically adjust according to system's uplink and downlink load condition, otherwise will influence the downlink throughput capacity of system.
Therefore, need a kind of at LTE TDD system design both can effectively reduce the scheduling controlling expense, can not cause the ascending HARQ method of restriction again to the system descending throughput.
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide the uplink data transmission method in a kind of LTE TDD system, and it can implement the HARQ method in LTE TDD system, under the prerequisite that does not influence throughput of system, effectively reduce the expense of scheduling controlling.
Comprise following processing according to the uplink data transmission method in the LTE TDD system of the embodiment of the invention:
Terminal sends upstream data; The base station receives when data are estimated to arrive, and sends feedback message according to reception result to terminal, and determines whether and will send the uplink authorization indication signaling to terminal according to reception result and predetermined transmission condition; And terminal detects feedback message and uplink authorization indication signaling, and carries out corresponding upstream data according to testing result and send.
Wherein, feedback message is the feedback message of mixed automatic retransmission request, and comprises " receiving successfully " feedback message and " taking defeat " feedback message.
If the base station correctly receives upstream data, then " receiving successfully " feedback message is sent to terminal, otherwise the feedback message that will " take defeat " sends to terminal.Here, the uplink authorization indication signaling comprises the new data flag territory, and new data flag territory carrying new data sends indication or data re-transmitting indication.
On the other hand, if the base station does not correctly receive data and retransmits the position and need change, then the base station uplink authorization indication signaling that will comprise the new data flag territory that carries data re-transmitting indication sends to terminal, carries the uplink authorization indication signaling that new data sends the new data flag territory of indication otherwise send to comprise to terminal.
At this moment, be " taking defeat " feedback message and do not detect the uplink authorization indication signaling if terminal detects feedback message, then terminal resends upstream data with predetermined time interval.
If terminal detects the uplink authorization indication signaling, the then indication of being carried according to the new data flag territory in the uplink authorization indication signaling is carried out corresponding upstream data and is sent.Here, resend indication if the new data flag territory carries, then terminal resends upstream data according to the uplink authorization indication signaling; If the new data flag territory carries new data and sends indication, then terminal sends new upstream data according to the uplink authorization indication signaling.
Be " receiving successfully " feedback message and do not detect the uplink authorization indication signaling if terminal detects feedback message, then terminal is not carried out the upstream data transmission.
By technique scheme of the present invention, can in LTE TDD system, implement the HARQ method, thereby under the prerequisite that does not influence throughput of system, effectively reduce the expense of scheduling controlling.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the block diagram according to the LTE TDD system configuration of correlation technique;
Fig. 2 is the schematic diagram according to the optional frame structure of the LTE TDD system of correlation technique;
Fig. 3 is the flow chart according to the uplink data transmission method in the LTE TDD system of the embodiment of the invention; And
Fig. 4 is according to the schematic diagram of the application example of the uplink data transmission method in the LTE TDD system of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
In the present embodiment, provide uplink data transmission method in a kind of LTE TDD system.
As shown in Figure 3, comprise following processing according to the uplink data transmission method in the LTE TDD system of present embodiment:
Step S302, terminal sends upstream data; Step S304, the base station receives when data are estimated to arrive, and sends feedback message according to reception result to terminal, and determines whether and will send the uplink authorization indication signaling to terminal according to reception result and predetermined transmission condition; And step S306, terminal detects feedback message and uplink authorization indication signaling, and carries out corresponding upstream data transmission according to testing result.
Wherein, feedback message is the feedback message of HARQ, and comprises " receiving successfully " (ACK) (NACK) feedback message of feedback message and " taking defeat ".
If the base station correctly receives upstream data, then " receiving successfully " feedback message is sent to terminal, otherwise the feedback message that will " take defeat " sends to terminal.Here, the uplink authorization indication signaling comprises the new data flag territory, and new data flag territory carrying new data sends indication or data re-transmitting indication.
On the other hand, if the base station does not correctly receive data and retransmits the position and need change, then the base station uplink authorization indication signaling that will comprise the new data flag territory that carries data re-transmitting indication sends to terminal, carries the uplink authorization indication signaling that new data sends the new data flag territory of indication otherwise send to comprise to terminal.
At this moment, be " taking defeat " feedback message and do not detect the uplink authorization indication signaling if terminal detects feedback message, then terminal resends upstream data with predetermined time interval.
If terminal detects the uplink authorization indication signaling, the then indication of being carried according to the new data flag territory in the uplink authorization indication signaling is carried out corresponding upstream data and is sent.Here, resend indication if the new data flag territory carries, then terminal resends upstream data according to the uplink authorization indication signaling; If the new data flag territory carries new data and sends indication, then terminal sends new upstream data according to the uplink authorization indication signaling.
Be " receiving successfully " feedback message and do not detect the uplink authorization indication signaling if terminal detects feedback message, then terminal is not carried out the upstream data transmission.
Below in conjunction with instantiation the present invention is described.
Fig. 4 is the schematic diagram that uses half synchronous HARQ method in LTE TDD system.
In this example, the repeating transmission time interval of the synchronous HARQ that supposing the system adopts is half subframe, maximum number of times of transmission is 4, and terminal sends new ascending HARQ data in the 2nd work song frame of first field, and nack message will be fed back to terminal in the base station after not receiving the data that terminal sends;
Terminal do not receive under the situation of uplink authorization indication signaling receiving NACK, resends this data according to repeating transmission time interval of synchronous HARQ in the 2nd work song frame of second field;
Continue after still not receiving the data that terminal sends to terminal feedback nack message the base station, but because the variation of system's uplink and downlink load, 1 sub-frame of uplink is only arranged in the base station decision in the 3rd field, therefore the mandate indication signaling that the data re-transmitting position in the 3rd field is moved on to the 1st work song frame is issued to terminal simultaneously in the base station, authorizes the NDI in the indication signaling to be set to for 0 (representing that this mandate is used for retransmitting);
Terminal resends data according to the uplink authorization indication signaling at the 2nd work song frame of the 3rd field behind the uplink authorization indication signaling of receiving NACK and being used to retransmit; The base station correctly receives after the data that terminal sends to terminal feeding back ACK information, and is used for the uplink authorization dispatch of new data transmission to the terminal issue, authorizes the NDI in the indication signaling to be set to for 1 (representing that this mandate is used for new data and sends).
Terminal resends data according to the uplink authorization indication signaling at the 2nd work song frame of the 4th field after receiving ACK and being used for the uplink authorization indication signaling of new data transmission.
And after this, the transmitting uplink data of terminal just can go on according to top mode.
In sum,, can in LTE TDD system, implement the HARQ method, under the prerequisite that does not influence throughput of system, effectively reduce the expense of scheduling controlling by means of technical scheme of the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the uplink data transmission method in the LTE TDD system is characterized in that, may further comprise the steps:
Terminal sends upstream data;
Described base station receives when data are estimated to arrive, and sends feedback message according to reception result to described terminal, and determines whether and will send the uplink authorization indication signaling to described terminal according to described reception result and predetermined transmission condition; And
Described terminal detects described feedback message and described uplink authorization indication signaling, and carries out corresponding upstream data transmission according to testing result.
2. uplink data transmission method according to claim 1 is characterized in that described feedback message is the feedback message of mixed automatic retransmission request, comprises " receiving successfully " feedback message and " taking defeat " feedback message.
3. uplink data transmission method according to claim 2, it is characterized in that, if described base station correctly receives described upstream data, then " receiving successfully " feedback message is sent to described terminal, otherwise the feedback message that will " take defeat " sends to described terminal.
4. according to each described uplink data transmission method in the claim 1 to 3, it is characterized in that described uplink authorization indication signaling comprises the new data flag territory, described new data flag territory carrying new data sends indication or data re-transmitting indication.
5. uplink data transmission method according to claim 4, it is characterized in that, if described base station does not correctly receive data and retransmits the position and need change, the uplink authorization indication signaling that then described base station will comprise the described new data flag territory that carries described data re-transmitting indication sends to described terminal, otherwise sends the uplink authorization indication signaling that comprises the described new data flag territory that carries described new data transmission indication to described terminal.
6. uplink data transmission method according to claim 5, it is characterized in that, if described terminal detects described feedback message to be described " taking defeat " feedback message and not to detect described uplink authorization indication signaling, then described terminal resends described upstream data with predetermined time interval.
7. uplink data transmission method according to claim 5, it is characterized in that, if described terminal detects described uplink authorization indication signaling, the then indication of being carried according to the described new data flag territory in the described uplink authorization indication signaling is carried out corresponding upstream data and is sent.
8. uplink data transmission method according to claim 7 is characterized in that, if described new data flag territory carries the described indication that resends, then described terminal resends described upstream data according to described uplink authorization indication signaling.
9. uplink data transmission method according to claim 7 is characterized in that, sends indication if described new data flag territory carries described new data, and then described terminal sends new upstream data according to described uplink authorization indication signaling.
10. uplink data transmission method according to claim 5, it is characterized in that, if described terminal detects described feedback message to be described " receiving successfully " feedback message and not to detect described uplink authorization indication signaling, then described terminal is not carried out upstream data and is sent.
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Cited By (9)
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| WO2010051695A1 (en) * | 2008-11-05 | 2010-05-14 | 华为技术有限公司 | Feedback and receiving method and apparatus of the responding information of semi-persistent scheduling packet |
| US7912007B2 (en) | 2008-11-05 | 2011-03-22 | Huawei Technologies Co., Ltd. | Method and apparatus for feeding back and receiving acknowledgement information of semi-persistent scheduling data packets |
| CN102158324A (en) * | 2008-11-05 | 2011-08-17 | 华为技术有限公司 | Semi-static scheduling data packet response information feedback, receiving method and apparatus thereof |
| CN101730250B (en) * | 2008-11-03 | 2012-07-04 | 电信科学技术研究院 | Method for semi-persistently dispatching resource, base station and user terminal |
| WO2014015794A1 (en) * | 2012-07-23 | 2014-01-30 | 华为技术有限公司 | Method, user equipment and base station for obtaining uplink grant |
| CN106910326A (en) * | 2015-12-22 | 2017-06-30 | 霍尼韦尔国际公司 | Warning device calibration method and system |
| CN110447278A (en) * | 2017-03-20 | 2019-11-12 | 华为技术有限公司 | System and method for supporting asynchronous uplink HARQ and multiple simultaneous transmissions |
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| US6622251B1 (en) * | 1999-04-07 | 2003-09-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Method to put a mobile terminal into sleep when a frame control channel containing a location of slow broadcast channel does not include wakeup information |
| JP3892682B2 (en) * | 2001-06-18 | 2007-03-14 | 株式会社エヌ・ティ・ティ・ドコモ | Packet transmission method, base station and mobile station |
| EP1379033A1 (en) * | 2002-07-01 | 2004-01-07 | Siemens Mobile Communications S.p.A. | Method for releasing single downlink TBFs in a mobile radio system |
| EP1557967B1 (en) * | 2004-01-22 | 2008-03-26 | Matsushita Electric Industrial Co., Ltd. | Method of HARQ retransmission timing control |
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2007
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| WO2010051695A1 (en) * | 2008-11-05 | 2010-05-14 | 华为技术有限公司 | Feedback and receiving method and apparatus of the responding information of semi-persistent scheduling packet |
| CN102158324B (en) * | 2008-11-05 | 2014-03-12 | 华为技术有限公司 | Semi-static scheduling data packet response information feedback, receiving method and apparatus thereof |
| US7912007B2 (en) | 2008-11-05 | 2011-03-22 | Huawei Technologies Co., Ltd. | Method and apparatus for feeding back and receiving acknowledgement information of semi-persistent scheduling data packets |
| CN102158324A (en) * | 2008-11-05 | 2011-08-17 | 华为技术有限公司 | Semi-static scheduling data packet response information feedback, receiving method and apparatus thereof |
| US10237042B2 (en) | 2008-11-05 | 2019-03-19 | Huawei Technologies Co., Ltd. | Method and apparatus for feeding back and receiving acknowledgement information of semi-persistent scheduling data packets |
| WO2014015794A1 (en) * | 2012-07-23 | 2014-01-30 | 华为技术有限公司 | Method, user equipment and base station for obtaining uplink grant |
| CN106910326A (en) * | 2015-12-22 | 2017-06-30 | 霍尼韦尔国际公司 | Warning device calibration method and system |
| CN112203260A (en) * | 2016-11-03 | 2021-01-08 | 华为技术有限公司 | Data transmission method and device |
| CN110447278A (en) * | 2017-03-20 | 2019-11-12 | 华为技术有限公司 | System and method for supporting asynchronous uplink HARQ and multiple simultaneous transmissions |
| CN110447278B (en) * | 2017-03-20 | 2021-12-14 | 华为技术有限公司 | System and method for supporting asynchronous uplink HARQ and multiple simultaneous transmissions |
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| CN113556781B (en) * | 2020-04-23 | 2023-07-04 | 维沃移动通信有限公司 | Data receiving and information configuration method, terminal and network equipment |
| CN113556781A (en) * | 2020-04-23 | 2021-10-26 | 维沃移动通信有限公司 | Data receiving method, information configuration method, terminal and network equipment |
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