CN101296061B - Uplink data transmission method of LTE TDD system - Google Patents
Uplink data transmission method of LTE TDD system Download PDFInfo
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- CN101296061B CN101296061B CN 200710103043 CN200710103043A CN101296061B CN 101296061 B CN101296061 B CN 101296061B CN 200710103043 CN200710103043 CN 200710103043 CN 200710103043 A CN200710103043 A CN 200710103043A CN 101296061 B CN101296061 B CN 101296061B
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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 the 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.The 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, will 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; We can find out from optional frame structure; 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, what need a kind ofly be directed against 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.
Uplink data transmission method according in the LTE TDD system of the embodiment of the invention comprises following processing:
Upstream data is sent at the terminal; The base station receives when data are estimated to arrive, and sends feedback message according to reception result to the terminal, and determines whether send the uplink authorization indication signaling to the terminal according to reception result and predetermined transmission condition; And terminal detection feedback message and uplink authorization indication signaling, and carry 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 the terminal, otherwise the feedback message that will " take defeat " sends to the terminal.Here, the uplink authorization indication signaling comprises the new data flag territory, and the new data flag territory is carried new data and sent 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 the terminal, carries the uplink authorization indication signaling that new data sends the new data flag territory of indication otherwise send to comprise to the terminal.
At this moment, be " taking defeat " feedback message and do not detect the uplink authorization indication signaling if the terminal detects feedback message, then the terminal resends upstream data with predetermined time interval.
If the terminal detects the uplink authorization indication signaling, the indication of then 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 the terminal resends upstream data according to the uplink authorization indication signaling; If the new data flag territory carries new data and sends indication, then new upstream data is sent according to the uplink authorization indication signaling in the terminal.
Be " receiving successfully " feedback message and do not detect the uplink authorization indication signaling if the terminal detects feedback message, then the upstream data transmission is not carried out at the terminal.
Through 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 specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, 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 sketch map 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 sketch map 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 explanation and explains the present invention, and be not used in qualification the present invention.
In the present embodiment, uplink data transmission method in a kind of LTE TDD system is provided.
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, upstream data is sent at the terminal; Step S304, the base station receives when data are estimated to arrive, and sends feedback message according to reception result to the terminal, and determines whether send the uplink authorization indication signaling to the terminal according to reception result and predetermined transmission condition; And step S306, feedback message and uplink authorization indication signaling are detected in the terminal, and carry out corresponding upstream data according to testing result and send.
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 the terminal, otherwise the feedback message that will " take defeat " sends to the terminal.Here, the uplink authorization indication signaling comprises the new data flag territory, and the new data flag territory is carried new data and sent 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 the terminal, carries the uplink authorization indication signaling that new data sends the new data flag territory of indication otherwise send to comprise to the terminal.
At this moment, be " taking defeat " feedback message and do not detect the uplink authorization indication signaling if the terminal detects feedback message, then the terminal resends upstream data with predetermined time interval.
If the terminal detects the uplink authorization indication signaling, the indication of then 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 the terminal resends upstream data according to the uplink authorization indication signaling; If the new data flag territory carries new data and sends indication, then new upstream data is sent according to the uplink authorization indication signaling in the terminal.
Be " receiving successfully " feedback message and do not detect the uplink authorization indication signaling if the terminal detects feedback message, then the upstream data transmission is not carried out at the terminal.
To combine instantiation to describe the present invention below.
Fig. 4 is the sketch map that in LTE TDD system, uses half synchronous HARQ method.
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 new ascending HARQ data are sent at the terminal in the 2nd work song frame of first field, and the base station will be to the terminal feedback nack message after not receiving the data that send at the terminal;
The terminal do not receive under the situation of uplink authorization indication signaling receiving NACK, in the 2nd work song frame of second field, resends this data according to repeating transmission time interval of synchronous HARQ;
The base station is not receiving that still the data continued that sends at the terminal is to the terminal feedback nack message; 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 the 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);
The 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 sent of terminal to terminal feedback 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).
The 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 at 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 merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the uplink data transmission method in the LTE TDD system is characterized in that, may further comprise the steps:
Upstream data is sent at the terminal;
The base station receives when data are estimated to arrive; Send feedback message according to reception result to said terminal; And determine whether sending the uplink authorization indication signaling to said terminal according to said reception result and predetermined transmission condition; Wherein, said uplink authorization indication signaling comprises the new data flag territory, and said new data flag territory is carried new data and sent indication or data re-transmitting indication; Wherein, If said base station does not correctly receive data and retransmits the position and need change, the uplink authorization indication signaling that then said base station will comprise the said new data flag territory that carries said data re-transmitting indication sends to said terminal, otherwise sends the uplink authorization indication signaling that comprises the said new data flag territory that carries said new data transmission indication to said terminal; And
Said feedback message and said uplink authorization indication signaling are detected in said terminal, and carry out corresponding upstream data according to testing result and send.
2. uplink data transmission method according to claim 1 is characterized in that said 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 said base station correctly receives said upstream data, then " receiving successfully " feedback message is sent to said terminal, otherwise the feedback message that will " take defeat " sends to said terminal.
4. uplink data transmission method according to claim 3; It is characterized in that; If said terminal detects said feedback message to be said " taking defeat " feedback message and not to detect said uplink authorization indication signaling, then said terminal resends said upstream data with predetermined time interval.
5. uplink data transmission method according to claim 1; It is characterized in that; If said terminal detects said uplink authorization indication signaling, the indication of then being carried according to the said new data flag territory in the said uplink authorization indication signaling is carried out corresponding upstream data and is sent.
6. uplink data transmission method according to claim 5 is characterized in that, if said new data flag territory carries said data re-transmitting indication, then said terminal resends said upstream data according to said uplink authorization indication signaling.
7. uplink data transmission method according to claim 5 is characterized in that, sends indication if said new data flag territory carries said new data, and new upstream data is sent according to said uplink authorization indication signaling in then said terminal.
8. uplink data transmission method according to claim 3; It is characterized in that; If said terminal detects said feedback message to be said " receiving successfully " feedback message and not to detect said uplink authorization indication signaling, then said terminal is not carried out upstream data and is sent.
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| CN 200710103043 CN101296061B (en) | 2007-04-29 | 2007-04-29 | Uplink data transmission method of LTE TDD system |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| US8249010B2 (en) | 2008-11-05 | 2012-08-21 | Huawei Technologies Co., Ltd. | Method and apparatus for feeding back and receiving acknowledgement information of semi-persistent scheduling data packets |
| CN101499882B (en) * | 2008-11-05 | 2011-05-04 | 华为技术有限公司 | Semi-static scheduling data packet response information feedback, receiving method and apparatus thereof |
| 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 |
| CN103582143B (en) * | 2012-07-23 | 2016-12-21 | 华为技术有限公司 | Obtain up method, subscriber equipment and the base station authorized |
| CN106910326B (en) * | 2015-12-22 | 2021-04-27 | 安定宝公司 | Alarm equipment calibration method and system |
| CN108024233B (en) * | 2016-11-03 | 2020-10-23 | 华为技术有限公司 | Data transmission method and device |
| US10652866B2 (en) | 2017-03-20 | 2020-05-12 | Huawei Technologies Co., Ltd. | Systems and methods for supporting asynchronous uplink HARQ and multiple simultaneous transmissions |
| 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 |
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