CN102480348A - Data transmission method and communication node - Google Patents
Data transmission method and communication node Download PDFInfo
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- CN102480348A CN102480348A CN2010105654121A CN201010565412A CN102480348A CN 102480348 A CN102480348 A CN 102480348A CN 2010105654121 A CN2010105654121 A CN 2010105654121A CN 201010565412 A CN201010565412 A CN 201010565412A CN 102480348 A CN102480348 A CN 102480348A
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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 a data transmission method and a communication terminal, which are applicable to a TDD (time division duplexing) system. The method comprises the following steps of: when a downlink and uplink resource allocation proportion is a first mode, a first communication node transmits first data to a second communication node on a first transmission time interval corresponding to the first mode; a second transmission time interval for the first communication node to retransmit the first data is obtained; and when the downlink and uplink resource allocation proportion is a second mode, the first communication node retransmits the first data on the second transmission time interval. The data transmission reliability and spectrum utilization rate of the TDD system are improved through the data transmission method and the communication terminal provided by the invention.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of data transmission method and communication node.
Background technology
In the wireless communication system; The base station is to show the equipment that the terminal provides service, and the base station communicates through uplink downlink and terminal, wherein; Down link (being also referred to as forward link) is meant the direction of base station to the terminal, and up link (being also referred to as reverse link) is meant the direction of terminal to base station.A plurality of terminals can be sent data through up link to the base station simultaneously, also can receive data simultaneously from the base station through down link.
Time division duplex (Time Division Duplex abbreviates TDD as) is Modern Communication System a kind of duplex mode commonly used, is used for separating receiving and transmitting channel (or uplink downlink).In adopting the wireless communication system of time division duplex, receive and send the carrying of the different time-gap that uses same frequency carrier as channel, guarantee to receive and the separating of transmitting channel with the time.Because the up-downgoing channel uses same frequency in the time division duplex; The up-downgoing channel has reciprocity; Thereby the GSM that makes time division duplex demonstrates certain exclusive characteristics; The convenience of frequency configuration for example, the relative activity of non-symmetrical service and Traffic Channel are easy to embody smart antenna advantage etc.
Variation along with the sub-district up-downgoing business load situation that adopts time division duplex; One or one group of sub-district need self adaptation adjustment up-downgoing resource allocation ratio to promote spectrum utilization efficiency; This just retransmits (Hybrid AutomaticRepeat Request to using to mix automatically; Abbreviating HARQ as) mode of carrying out data re-transmission proposed challenge; Particularly to synchronous HARQ data re-transmission mode, reason is that the time point of synchronous HARQ data re-transmission is relevant with up-downgoing resource allocation ratio, and the regular meeting of different resources distribution ratio causes different data re-transmission time points.As shown in Figure 1; The up-downgoing resource allocation ratio of a cell initial is (to suppose a frame 8 sub-frame be made up of at 4: 4; The up-downgoing business respectively accounts for 4 sub-frame); When industry be engaged in to increase instantly, this sub-district is adjusted into 3: 5 with up-downgoing resource allocation ratio, and (suppose that a frame is made up of 8 sub-frame, uplink service accounted for 3 sub-frame; Downlink business accounts for 5 sub-frame); If need carry out synchronous HARQ data re-transmission (the 4th sub-frame of uplink in frame next) in preceding the 4th sub-frame of uplink of up-downgoing resource allocation this moment ratio adjustment,, will cause the terminal not have ascending resource to send the situation generation of data retransmission owing to do not have the 4th sub-frame of uplink in the new up-downgoing resource allocation ratio; The situation that data retransmission in other sub-frame of uplink does not have resource to send also possibly appear certainly, chronomere and computational methods that this sequential relationship that depends on synchronous HARQ adopts when calculating.In like manner; When uplink service increases; This sub-district is adjusted into 5: 3 with up-downgoing resource allocation ratio, upstream case also can occur being similar in some subframes (like the 4th descending sub frame among Fig. 1) that adopt down-going synchronous HARQ to retransmit and take place, and does not also have method to address the above problem at present.Need explanation, the mode that the packet that adopts the HARQ mode to retransmit can be followed steadily increase redundancy or catch up with merging realizes.
In sum, in the correlation technique since the pattern of up-downgoing resource allocation ratio change and cause changing the back data retransmission and do not have transfer resource to transmit to cause data transmission credibility poor.
Summary of the invention
Main purpose of the present invention is to provide data transmission method and communication node, to solve in the correlation technique since the pattern of up-downgoing resource allocation ratio change and cause changing the back data retransmission and do not have transfer resource can transmit the problem that causes data transmission credibility poor.
To achieve these goals, according to an aspect of the present invention, a kind of data transmission method is provided, has been applied in the TDD system.
Data transmission method according to the present invention comprises: when up-downgoing resource allocation ratio was first pattern, first communication node sent first data and gives the second communication node on the first corresponding Transmission Time Interval of first pattern; Obtain second Transmission Time Interval that first communication node retransmits first data; When up-downgoing resource allocation ratio was changed to second pattern, first communication node carried out the re-transmission of first data on second Transmission Time Interval.
Further, obtaining second Transmission Time Interval that first communication node transmits data again comprises: obtain one of in the following manner second Transmission Time Interval that first communication node transmits data again: the system default configuration; Main controlled node in first communication node or the second communication node is confirmed.
Further; After obtaining second Transmission Time Interval that first communication node transmits data again; Also comprise: first communication node is a main controlled node, and the second communication node is a controlled node, and first communication node sends to the second communication node with second Transmission Time Interval; Or first communication node be controlled node, the second communication node is a main controlled node, the second communication node sends to first communication node with second Transmission Time Interval.
Further; Also comprise: on the 3rd Transmission Time Interval, use the 2nd HARQ process number to send second data at first communication node and give the second communication node; And first communication node transmits second data again on second Transmission Time Interval; Wherein, the 3rd Transmission Time Interval is less than second time interval, when up-downgoing resource allocation ratio is changed to second pattern; First communication node comprises in the re-transmission of carrying out first data on second Transmission Time Interval: first communication node uses the process number of a HARQ to carry out the re-transmission of first data on second Transmission Time Interval, and wherein a HARQ process number is different with the 2nd HARQ.
Further; First communication node carries out the re-transmission of first data on second Transmission Time Interval after; Also comprise: receive the data that first communication node retransmits at second transmission intercal when the second communication node fails, then first communication node retransmits first data according to the timing relationship of the HARQ of second pattern.
Further, first Transmission Time Interval is different with the 4th time interval, and wherein, the 4th time interval was a up-downgoing resource allocation ratio when first mode switch is second pattern, retransmitted the affected time interval of sequential.
To achieve these goals, according to a further aspect in the invention, a kind of data transmission method is provided, has been applied in the TDD system.
Data transmission method according to the present invention comprises: the condition that third communication node one of is confirmed to satisfy below it: condition 1: up link and/or down link not have the data of re-transmission to transmit; Condition 2: up link and/or down link have the data of re-transmission to transmit and confirm to carry out the 3rd predetermined time interval after the up-downgoing resource allocation mode conversion; Wherein, the 3rd predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of up-downgoing resource allocation ratio; Third communication node uses the four-mode of up-downgoing resource allocation ratio to carry out transfer of data.
Further; The data that up link and/or down link do not have to retransmit are transmitted and comprised: up link and/or down link not have the data of re-transmission to transmit at the 4th predetermined time interval; Wherein, the 4th predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of up-downgoing resource allocation ratio.
Further, after the four-mode of third communication node use up-downgoing resource allocation ratio carries out transfer of data, also comprise: third communication node Resources allocation data retransmission.
To achieve these goals, in accordance with a further aspect of the present invention, a kind of communication node is provided.
Communication node according to the present invention comprises: sending module, be used for when up-downgoing resource allocation ratio is first pattern, and on the first corresponding Transmission Time Interval of first pattern, send first data and give the second communication node; Acquisition module is used to obtain second Transmission Time Interval that its place communication node retransmits first data; First retransmission module is used for when up-downgoing resource allocation ratio is changed to second pattern, on second Transmission Time Interval, carrying out the re-transmission of first data.
Further; First retransmission module comprises: retransmit submodule; Be used on the 3rd Transmission Time Interval, using the 2nd HARQ process number to send second data and give the second communication node that communicates with at first communication node; And the communication node at its place transmits second data again on second Transmission Time Interval, and wherein, the 3rd Transmission Time Interval is during less than second time interval; On second Transmission Time Interval, use the process number of a HARQ to carry out the re-transmission of first data, wherein a HARQ process number is different with the 2nd HARQ.
Further, also comprise: second retransmission module, be used for receiving the data that its place communication node retransmits at second transmission intercal when the second communication node that communicate with fails, retransmit first data according to the timing relationship of the HARQ of second pattern.
To achieve these goals, according to another aspect of the invention, a kind of communication node is provided.
Communication node according to the present invention comprises: determination module, and be used for confirming the condition that its place node one of satisfies below it: condition 1: up link and/or down link not have the data of re-transmission to transmit; Condition 2: up link and/or down link have the data of re-transmission to transmit and confirm to carry out the 3rd predetermined time interval after the up-downgoing resource allocation mode conversion; Wherein, the 3rd predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of up-downgoing resource allocation ratio; Transport module is used to use the four-mode of up-downgoing resource allocation ratio to carry out transfer of data.
Further, also comprise: the data re-transmission module is used for the communication node Resources allocation data retransmission at its place.
Through the present invention; When the pattern that is employed in up-downgoing resource allocation ratio changes; Confirm that first communication node retransmits the new Transmission Time Interval of first data and data retransmission on new Transmission Time Interval; Solved that the TDD system causes data retransmission to be made mistakes in the correlation technique after the conversion of up-downgoing resource allocation ratio mode; Cause the poor problem of TDD system data transmission reliability, and then reached the effect that improves the availability of frequency spectrum of TDD system data transmission reliability and TDD system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map of the influenced subframe when changing of the up-downgoing resource allocation ratio according to correlation technique;
Fig. 2 is the first pass figure according to the transfer of data of the embodiment of the invention;
Fig. 3 is second flow chart according to the transfer of data of the embodiment of the invention;
Fig. 4 is that the communication node according to the employing time division duplex of the embodiment of the invention utilizes synchronous HARQ data re-transmission mode to carry out the flow chart of transfer of data when up-downgoing resource allocation ratio changes;
Fig. 5 is the flow chart that when up-downgoing resource allocation ratio changes, carries out transfer of data according to the communication node of the employing time division duplex of the embodiment of the invention;
Fig. 6 is first structured flowchart according to the communication node of the embodiment of the invention;
Fig. 7 is preferred first structured flowchart according to the communication node of the embodiment of the invention;
Fig. 8 is second structured flowchart according to the communication node of the embodiment of the invention; And
Fig. 9 is preferred second structured flowchart according to the communication node of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Present embodiment provides a kind of data transmission method, is applied in the TDD system, and Fig. 2 is the first pass figure according to the transfer of data of the embodiment of the invention, and is as shown in Figure 2, and this method comprises:
Step S202: when up-downgoing resource allocation ratio was first pattern, first communication node sent first data and gives the second communication node on the first corresponding Transmission Time Interval of first pattern;
Step S204: obtain second Transmission Time Interval that first communication node retransmits first data;
Step S206: when up-downgoing resource allocation ratio was changed to second pattern, first communication node carried out the re-transmission of first data on second Transmission Time Interval.
Pass through above-mentioned steps; When the pattern of up-downgoing resource allocation ratio changes; Confirm that first communication node retransmits the new Transmission Time Interval of first data and data retransmission on new Transmission Time Interval; Overcome in the correlation technique because the pattern of up-downgoing resource allocation ratio changes and causes changing the back data retransmission and do not have transfer resource can transmit the problem that causes data transmission credibility poor, improved the availability of frequency spectrum of TDD system data transmission reliability and TDD system.
Preferably, step S204 comprises: obtain one of in the following manner second Transmission Time Interval that first communication node transmits data again: the system default configuration; Main controlled node in first communication node or the second communication node is confirmed.Through the preferred embodiment, can be configured neatly second Transmission Time Interval, lowered system complexity.
Preferably, after step S204, also comprise: first communication node is a main controlled node, and the second communication node is a controlled node, and first communication node sends to the second communication node with second Transmission Time Interval; Or first communication node be controlled node, the second communication node is a main controlled node, the second communication node sends to first communication node with second Transmission Time Interval.Through the preferred embodiment, main controlled node sends to the node that communicates with the Transmission Time Interval of confirming, has improved the reliability of second Transmission Time Interval transmission.
Preferably; On the 3rd Transmission Time Interval, use the 2nd HARQ process number to send second data at first communication node and give the second communication node; And first communication node transmits second data again on second Transmission Time Interval; Wherein, the 3rd Transmission Time Interval is less than second time interval, and one that faces step S206 down preferred embodiment describes.First communication node uses the process number of a HARQ to carry out the re-transmission of first data on second Transmission Time Interval, and wherein a HARQ process number is different with the 2nd HARQ.Through the preferred embodiment, distinguish the different pieces of information of re-transmission through different HARQ process numbers, improved the accuracy that communication node receives data retransmission.
Preferably, after step S206, also comprise: receive the data that first communication node retransmits at second transmission intercal when the second communication node fails, then first communication node retransmits first data according to the timing relationship of the HARQ of second pattern.Through the preferred embodiment, after converting second pattern into, adopt new timing relationship to retransmit first data corresponding to this pattern, improved the reliability and the stability of system transmissions data.
Preferably, first Transmission Time Interval is different with the 4th time interval, and wherein, the 4th time interval was a up-downgoing resource allocation ratio when first mode switch is second pattern, retransmitted the affected time interval of sequential.Through the preferred embodiment, confirm that first Transmission Time Interval is different with the re-transmission affected time interval of sequential, improved the reliability of system transmissions data.
Present embodiment has improved a kind of data transmission method, is applied in the TDD system, and Fig. 3 is second flow chart according to the transfer of data of the embodiment of the invention, and is as shown in Figure 3, and this method comprises:
Step S302: the condition that third communication node one of is confirmed to satisfy below it:
Condition 1: the data that up link and/or down link do not have to retransmit are transmitted;
Condition 2: up link and/or down link have the data of re-transmission to transmit and confirm to carry out the 3rd predetermined time interval after the up-downgoing resource allocation mode conversion; Wherein, the 3rd predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of up-downgoing resource allocation ratio.
Step S304: third communication node uses the four-mode of up-downgoing resource allocation ratio to carry out transfer of data.
Preferably; The data that up link and/or down link do not have to retransmit in the condition 1 are transmitted and comprised: up link and/or down link not have the data of re-transmission to transmit at the 4th predetermined time interval; Wherein, the 4th predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of up-downgoing resource allocation ratio.Through the preferred embodiment, communication node confirms in the 4th predetermined time interval, not have the data of re-transmission to transmit, and has guaranteed the reliability of up-downgoing resource allocation mode conversion back data retransmission.
Preferably, after step S304, also comprise: third communication node Resources allocation data retransmission.Through the preferred embodiment, third communication node transmits the new resource of data allocations that needs retransmit in Resources allocation, has improved the reliability and the accuracy of TDD system data transmission.
Embodiment one
Present embodiment provides a kind of data transmission method, and present embodiment has combined the foregoing description and preferred implementation wherein.Fig. 4 is that the communication node according to the employing time division duplex of the embodiment of the invention utilizes synchronous HARQ data re-transmission mode to carry out the flow chart of transfer of data when up-downgoing resource allocation ratio changes, and as shown in Figure 4, this method comprises:
Step S402: when up-downgoing resource allocation ratio was Mode A, first communication node used first resource to send data to the second communication node on first Transmission Time Interval.
Step S404: after up-downgoing resource allocation ratio is changed to Mode B; First communication node need use the second resource data retransmission to give the second communication node on second Transmission Time Interval; Wherein, The timing relationship of first Transmission Time Interval and second Transmission Time Interval can be a default configuration, or dynamically adjust.
Preferably, above-mentioned first resource can be identical with second resource.
Preferably; When first communication node is the main controlled node that carries out resource allocation; The second communication node is a controlled node, or the second communication node is the main controlled node that carries out resource allocation, when first communication node is controlled node; Main controlled node is notified the timing relationship of controlled node first Transmission Time Interval and second Transmission Time Interval before up-downgoing resource allocation ratio is converted into Mode B, and/or the notice controlled node sends or receive employed second resource of data.
Preferably, the timing relationship of first Transmission Time Interval and second Transmission Time Interval depends on Mode A and/or Mode B.
Preferably; When first communication node sends data to the second communication node on the 3rd Transmission Time Interval; And first communication node need be given the second communication node by data retransmission on second Transmission Time Interval; Wherein, the 3rd Transmission Time Interval is in time in advance in second transmission and the time interval, and then the HARQ process number that on first Transmission Time Interval and the 3rd Transmission Time Interval, uses of first communication node is different.Through the preferred embodiment, improved the accuracy of data retransmission.
Preferably, receive the data that first communication node retransmits at second Transmission Time Interval when the second communication node fails, then first communication node continues data retransmission according to Mode B predetermined timing relation.
Preferably, after the up-downgoing resource allocation ratio that first transmission intercal is different from communication node converts Mode B into from Mode A, retransmit the affected Transmission Time Interval of sequential.
Preferably; When first communication node or second communication node are when carrying out the main controlled node of resource allocation, main controlled node converts into not distribute to first communication node in the time zone that length before the Mode B is L from Mode A and retransmits the affected Transmission Time Interval of sequential.
Embodiment two
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex; Wherein, One frame is made up of several subframes, is assumed to be 8, and initial up-downgoing resource allocation ratio is Mode A (4: 4); Because the variation of up-downgoing loading condition, sub-district BS-A (base station) is adjusted into Mode B (3: 5) with up-downgoing resource allocation ratio.
Be that the terminal MS-A of serving BS sends data through Resource Block RB-A and successfully do not received by BS-A with BS-A on the 4th sub-frame of uplink of i frame (BS-A adopts Mode A in this frame); Then according to the requirement of Mode A; The sequential relationship MS-A that synchronous HARQ retransmits need retransmit these data on the 4th sub-frame of uplink of (i+1) frame; If adopt Mode B at (i+1) frame BS-A; Then do not have the 4th sub-frame of uplink in (i+1) frame, this moment, MS-A retransmitted this data through Resource Block RB-A according to the sequential relationship that system default configuration or standard default pattern arranged A convert Mode B on the 3rd sub-frame of uplink on (i+1) frame.
Preferably; BS-A can use the Resource Block RB-B that is different from Resource Block RB-A to retransmit these data on the 3rd sub-frame of uplink on (i+1) frame through resource allocation signal notice MS-A; This moment, BS-A need be through the resource allocation signal notice MS-A information relevant with Resource Block RB-B (for example original position, size etc.).
Embodiment three
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex; Wherein, One frame is made up of several subframes, is assumed to be 8, and initial up-downgoing resource allocation ratio is Mode A (4: 4); Because the variation of up-downgoing loading condition, sub-district BS-A (base station) is adjusted into Mode B (2: 6) with up-downgoing resource allocation ratio.
Be that the terminal MS-A of serving BS sends data through Resource Block RB-A and successfully do not received by BS-A with BS-A on second sub-frame of uplink of i frame (BS-A adopts Mode A in this frame); Then according to the requirement of Mode A; The sequential relationship MS-A that synchronous HARQ retransmits need retransmit these data on the 6th sub-frame of (i+1) frame; If adopt Mode B at (i+1) frame BS-A; Then the 6th sub-frame is a descending sub frame in (i+1) frame, and this moment, MS-A retransmitted these data according to BS-A on the re-transmission resource that obtains through resource allocation signal on (i+1) frame, and for example BS-A distributes the Resource Block RB-B of first sub-frame of uplink on this frame to let MS-A retransmit these data; The Resource Block RB-B that perhaps joins first sub-frame of uplink on this frame lets MS-A retransmit these data, and promptly the timing relationship of synchronous HARQ can dynamically be adjusted in this case.
Position and/or size can be identical in subframe for Resource Block RB-A, RB-B, also can be different.
Embodiment four
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex; Wherein, One frame is made up of several subframes, is assumed to be 8, and initial up-downgoing resource allocation ratio is Mode A (4: 4); Because the variation of up-downgoing loading condition, sub-district BS-A (base station) is adjusted into Mode B (3: 5) with up-downgoing resource allocation ratio.
Terminal MS-the A that with BS-A is serving BS adopted Mode A before i frame and i frame; Begin the back at (i+1) frame and adopt Mode B; The re-transmission resource that then possibly on the frame after (i+1) frame or this frame, use for the MS-A distribution in advance in the frame of BS-A before i frame or i frame if MS-A need carry out the synchronous HARQ data re-transmission on the frame after (i+1) frame or this frame, is then used to retransmit resource; Otherwise BS-A can use to other user this resource allocation.
Embodiment five
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex; Wherein, One frame is made up of several subframes, is assumed to be 8, and initial up-downgoing resource allocation ratio is Mode A (4: 4); Because the variation of up-downgoing loading condition, sub-district BS-A (base station) is adjusted into Mode B (2: 6) with up-downgoing resource allocation ratio.
Terminal MS-the A that with BS-A is serving BS adopted Mode A before i frame and i frame; Begin the back at (i+1) frame and adopt Mode B; The timing relationship of BS-A notice MS-A synchronous HARQ behind the Mode A translative mode B in the frame before i frame or the i frame then; If MS-A need carry out data re-transmission in (i+1) frame, then use this timing relationship.
Embodiment six
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex; Wherein, One frame is made up of several subframes, is assumed to be 8, and initial up-downgoing resource allocation ratio is Mode A (4: 4); Because the variation of up-downgoing loading condition, sub-district BS-A (base station) is adjusted into Mode B (3: 5) with up-downgoing resource allocation ratio.
Be that the terminal MS-A of serving BS sends data DT-A and successfully do not received by BS-A with BS-A on the 4th sub-frame of uplink of i frame (BS-A adopts Mode A in this frame); Then according to the requirement of Mode A; The sequential relationship MS-A that synchronous HARQ retransmits need retransmit these data on the 4th sub-frame of uplink of (i+1) frame; If adopt Mode B at (i+1) frame BS-A; Then do not have the 4th sub-frame of uplink in (i+1) frame, this moment, MS-A retransmitted this data through Resource Block RB-A according to the sequential relationship that the Mode A of system default configuration or standard default configuration or dynamic-configuration converts Mode B on the 3rd sub-frame of uplink of (i+1) frame.Need explanation; If MS-A sends data DT-B and is not successfully received by BS-A on the 3rd sub-frame of uplink on the i frame; And MS-A sequential relationship according to the rules retransmits at the enterprising line data of the 3rd sub-frame of uplink of (i+1) frame; BS-A need guarantee that MS-A is different to the process number that these two kinds of data re-transmission adopt in scheduling on this subframe; Otherwise the DT-B that can cause BS-A can't judge that MS-A retransmits still is the data cases of DT-A, particularly under the situation that the re-transmission resource changes.
Embodiment seven
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex; Wherein, One frame is made up of several subframes, is assumed to be 8, and initial up-downgoing resource allocation ratio is Mode A (4: 4); Because the variation of up-downgoing loading condition, sub-district BS-A (base station) is adjusted into Mode B (2: 6) with up-downgoing resource allocation ratio.
After supposing to convert Mode B into from Mode A; Retransmitting the affected sub-frame of uplink of sequential in the Mode A is the 3rd sub-frame of uplink, the 4th sub-frame of uplink; And convert Mode B into since (i+1) frame, then BS-A can not distribute the resource of relevant influenced sub-frame of uplink for terminal MS-A in L frame before (i+1) frame.
Embodiment eight
Present embodiment provides a kind of data transmission method, and present embodiment has combined the foregoing description and preferred implementation wherein.Time point when the embodiment of the invention changes through choosing up-downgoing resource allocation ratio carries out transfer of data.Fig. 5 is the flow chart that when up-downgoing resource allocation ratio changes, carries out transfer of data according to the communication node of the employing time division duplex of the embodiment of the invention, and as shown in Figure 5, this method comprises:
Step S502: confirm that up-downgoing resource allocation ratio is that the communication node of Mode A is not when up link and/or down link have data to retransmit, or after the communication node decision converts length behind the Mode B into and be the time interval of L from Mode A;
Step S504: the up-downgoing resource allocation ratio that communication node adopts converts Mode B into.
Preferably, up link and/or down link do not have data to retransmit to be meant do not have data to need to retransmit on the time interval in specific transmission among the step S502.
Preferably, the specific transmission time interval retransmits the affected Transmission Time Interval of sequential after being meant that the up-downgoing resource allocation ratio of communication node converts Mode B into from Mode A when adopting synchronous HARQ data re-transmission mode.
Preferably, after the step S504, the data allocations new resource of communication node for needing to retransmit.
Through embodiment one and embodiment two; Wireless communication system can system in fact the situation of down load dynamically adjust the up-downgoing resource allocation ratio of sub-district (base station); Thereby improve the service quality and the spectrum utilization efficiency of system, improved the adaptability of wireless communication system actual environment.
Embodiment nine
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment eight and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex, and wherein, a frame is made up of several subframes; Be assumed to be 8; Initial up-downgoing resource allocation ratio is Mode A (4: 4), because the variation of up-downgoing loading condition, sub-district BS-A (base station) plan is adjusted into Mode B (3: 5) with up-downgoing resource allocation ratio; When then BS-A treated that up link and/or down link do not have data to retransmit, BS-A adopted Mode B to carry out subsequent operation.
Preferably; This up link and/or down link do not have data to retransmit to be meant do not have data to need to retransmit on the time interval in specific transmission; After this specific transmission time interval is meant that the up-downgoing resource allocation ratio of this communication node converts Mode B into from Mode A; Retransmit the affected Transmission Time Interval of sequential, for example the 4th sub-frame of uplink in the Mode A when adopting synchronous HARQ data re-transmission mode.
Embodiment ten
Present embodiment provides a kind of data transmission method, and present embodiment has combined embodiment one and preferred implementation wherein.Present embodiment is in the wireless communication system of time division duplex, and wherein, a frame is made up of several subframes; Be assumed to be 8, initial up-downgoing resource allocation ratio is Mode A (4: 4), because the variation of up-downgoing loading condition; Sub-district BS-A (base station) decision is adjusted into Mode B (2: 6) with up-downgoing resource allocation ratio; Consider the influence of factor such as synchrodata re-transmission, after BS-A made decision L frame, BS-A adopted Mode B to carry out subsequent operation.
Preferably, if the upstream or downstream data before behind the BS-A translative mode B also need retransmit, then BS-A distributes new these data of re-transmission resource transmission.
Need to prove; Though embodiment one to embodiment ten transfer of data with up link is that example is described; The data transmission method of down link is similar with the data transmission method of up link, and promptly this method is equally applicable to down link, repeats no more at this.
Present embodiment provides a kind of communication node; In order to realize above-mentioned data transmission method; Fig. 6 is first structured flowchart according to the communication node of the embodiment of the invention, and is as shown in Figure 6, and this communication node comprises: sending module 62; The acquisition module 64 and first retransmission module 66 are described in detail in the face of said structure down:
Sending module 62 is used for when up-downgoing resource allocation ratio is first pattern, on the first corresponding Transmission Time Interval of first pattern, sends first data and gives the second communication node;
Acquisition module 64 is used to obtain second Transmission Time Interval that its place communication node retransmits first data;
First retransmission module 66 is used for when up-downgoing resource allocation ratio is changed to second pattern, on second Transmission Time Interval, carrying out the re-transmission of first data.
Fig. 7 is preferred first structured flowchart according to the communication node of the embodiment of the invention, and is as shown in Figure 7, and first retransmission module 66 comprises: retransmit submodule 662; Second retransmission module 72 is described in detail in the face of said structure down:
Retransmit submodule 662; Be used on the 3rd Transmission Time Interval, using the 2nd HARQ process number to send second data and give the second communication node that communicates with at first communication node; And the communication node at its place transmits second data again on second Transmission Time Interval, and wherein, the 3rd Transmission Time Interval is during less than second time interval; On second Transmission Time Interval, use the process number of a HARQ to carry out the re-transmission of first data, wherein a HARQ process number is different with the 2nd HARQ.
Second retransmission module 72 is used for receiving the data that its place communication node retransmits at second transmission intercal when the second communication node that communicate with fails, and retransmits first data according to the timing relationship of the HARQ of second pattern.
Present embodiment provides a kind of communication node; Be used to realize above-mentioned data transmission method, Fig. 8 is second structured flowchart according to the communication node of the embodiment of the invention, and is as shown in Figure 8; This communication node comprises: determination module 82 and transport module 84 are described in detail in the face of said structure down:
Determination module 82 is used for confirming the condition that its place node one of satisfies below it:
Condition 1: the data that up link and/or down link do not have to retransmit are transmitted;
Condition 2: up link and/or down link have the data of re-transmission to transmit and when confirming to carry out the 3rd predetermined time interval after the up-downgoing resource allocation mode conversion; Wherein, the 3rd predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of up-downgoing resource allocation ratio;
Transport module 84 is connected to second determination module 82, is used at second determination module 82, uses the four-mode of up-downgoing resource allocation ratio to carry out transfer of data.
Fig. 9 is preferred second structured flowchart according to the communication node of the embodiment of the invention, and as shown in Figure 9, this communication node also comprises: data re-transmission module 92 is described in detail in the face of said structure down:
Data re-transmission module 92 is used for the communication node Resources allocation data retransmission at its place.
Pass through the foregoing description; Data transmission method and communication node are provided; Through active data retransmit and the system of selection of up-downgoing resource allocation ratio transfer point to improve the service efficiency of frequency resource; Improve the performance of entire wireless communication system (for example adopting the wireless communication system of standards such as LTE (Long Term Evolution, Long Term Evolution), IEEE 802.16, UMB (Ultra Mobile Broadband, super mobile broadband), IEEE 802.11).
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
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 (14)
1. a data transmission method is applied to it is characterized in that in the TDD system, comprising:
When up-downgoing resource allocation ratio was first pattern, first communication node sent first data and gives the second communication node on the first corresponding Transmission Time Interval of said first pattern;
Obtain second Transmission Time Interval that said first communication node retransmits said first data;
When said up-downgoing resource allocation ratio was changed to second pattern, said first communication node carried out the re-transmission of said first data on said second Transmission Time Interval.
2. method according to claim 1 is characterized in that, obtains second Transmission Time Interval that first communication node transmits said data again and comprises:
Obtain one of in the following manner second Transmission Time Interval that first communication node transmits said data again:
The system default configuration;
Main controlled node in said first communication node or the said second communication node is confirmed.
3. method according to claim 1 is characterized in that, after obtaining second Transmission Time Interval that first communication node transmits said data again, also comprises:
Said first communication node is a main controlled node, and said second communication node is a controlled node, and said first communication node sends to said second communication node with said second Transmission Time Interval; Or
Said first communication node is a controlled node, and said second communication node is a main controlled node, and said second communication node sends to said first communication node with said second Transmission Time Interval.
4. method according to claim 1; It is characterized in that; Also comprise: on the 3rd Transmission Time Interval, use the automatic repeat requests HARQ process number of second mixing to send second data at said first communication node and give said second communication node; And said first communication node transmits said second data again on said second Transmission Time Interval, and wherein, said the 3rd Transmission Time Interval is less than said second time interval; When said up-downgoing resource allocation ratio was changed to second pattern, said first communication node carries out said first data on said second Transmission Time Interval re-transmission comprised:
Said first communication node uses the process number of a HARQ to carry out the re-transmission of said first data on said second Transmission Time Interval, and a wherein said HARQ process number is different with said the 2nd HARQ.
5. method according to claim 1 is characterized in that, said first communication node carries out the re-transmission of said first data on said second Transmission Time Interval after, also comprises:
Receive the said data that said first communication node retransmits at said second transmission intercal when said second communication node fails, then said first communication node retransmits said first data according to the timing relationship of the said HARQ of said second pattern.
6. according to each described method in the claim 1 to 5, it is characterized in that,
Said first Transmission Time Interval is different with the 4th time interval, and wherein, said the 4th time interval is said up-downgoing resource allocation ratio when first mode switch is second pattern, retransmits the affected time interval of sequential.
7. a data transmission method is applied to it is characterized in that in the TDD system, comprising:
The condition that third communication node one of is confirmed to satisfy below it:
Condition 1: the data that up link and/or down link do not have to retransmit are transmitted;
Condition 2: up link and/or down link have the data of re-transmission to transmit and confirm to carry out the 3rd predetermined time interval after the up-downgoing resource allocation mode conversion; Wherein, said the 3rd predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of said up-downgoing resource allocation ratio;
Said third communication node uses the four-mode of up-downgoing resource allocation ratio to carry out transfer of data.
8. method according to claim 7 is characterized in that, the data that up link and/or down link do not have to retransmit are transmitted and comprised:
Up link and/or down link transmit in the data that the 4th predetermined time interval does not have to retransmit, and wherein, said the 4th predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of said up-downgoing resource allocation ratio.
9. method according to claim 7 is characterized in that, after the four-mode of said third communication node use up-downgoing resource allocation ratio carried out transfer of data, also comprise: said third communication node Resources allocation retransmitted said data.
10. a communication node is characterized in that, comprising:
Sending module is used for when up-downgoing resource allocation ratio is first pattern, on the first corresponding Transmission Time Interval of said first pattern, sends first data and gives the second communication node;
Acquisition module is used to obtain second Transmission Time Interval that its place communication node retransmits said first data;
First retransmission module is used for when said up-downgoing resource allocation ratio is changed to second pattern, on said second Transmission Time Interval, carrying out the re-transmission of said first data.
11. communication node according to claim 10 is characterized in that, said first retransmission module comprises:
Retransmit submodule; Be used on the 3rd Transmission Time Interval, using the 2nd HARQ process number to send second data and give the second communication node that communicates with at said first communication node; And the communication node at its place transmits said second data again on said second Transmission Time Interval; Wherein, Said the 3rd Transmission Time Interval uses the process number of a HARQ to carry out the re-transmission of said first data on said second Transmission Time Interval during less than said second time interval, and a wherein said HARQ process number is different with said the 2nd HARQ.
12. communication node according to claim 10 is characterized in that, also comprises:
Second retransmission module is used for receiving the said data that its place communication node retransmits at said second transmission intercal when the second communication node that communicate with fails, and retransmits said first data according to the timing relationship of the said HARQ of said second pattern.
13. a communication node is characterized in that, comprising:
Determination module is used for confirming the condition that its place node one of satisfies below it:
Condition 1: the data that up link and/or down link do not have to retransmit are transmitted;
Condition 2: up link and/or down link have the data of re-transmission to transmit and confirm to carry out the 3rd predetermined time interval after the up-downgoing resource allocation mode conversion; Wherein, said the 3rd predetermined time interval is confirmed according to the affected Transmission Time Interval of mode switch re-transmission sequential of said up-downgoing resource allocation ratio;
Transport module is used to use the four-mode of up-downgoing resource allocation ratio to carry out transfer of data.
14. communication node according to claim 13 is characterized in that, also comprises:
The data re-transmission module is used for the communication node Resources allocation data retransmission at its place.
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| CN201010565412.1A CN102480348B (en) | 2010-11-29 | 2010-11-29 | Data transmission method and communication node |
| CN201410271236.9A CN104079395B (en) | 2010-11-29 | 2010-11-29 | Data transmission method and communication node |
| PCT/CN2011/075224 WO2012071872A1 (en) | 2010-11-29 | 2011-06-02 | Data transmission method and communication point |
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| CN102480348B (en) | 2014-10-22 |
| WO2012071872A1 (en) | 2012-06-07 |
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