CN102377550A - Method and device for transmitting relay link HARQ (Hybrid Automatic Repeat Request) of time division duplex system - Google Patents
Method and device for transmitting relay link HARQ (Hybrid Automatic Repeat Request) of time division duplex system Download PDFInfo
- Publication number
- CN102377550A CN102377550A CN2010102558461A CN201010255846A CN102377550A CN 102377550 A CN102377550 A CN 102377550A CN 2010102558461 A CN2010102558461 A CN 2010102558461A CN 201010255846 A CN201010255846 A CN 201010255846A CN 102377550 A CN102377550 A CN 102377550A
- Authority
- CN
- China
- Prior art keywords
- relay
- uplink
- subframe
- downlink
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
-
- 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
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0097—Relays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
Abstract
The invention discloses a method and a device for transmitting a relay link HARQ (Hybrid Automatic Repeat Request) of a time division duplex system, which are used for reasonably setting the time sequence of a relay link HARQ and ensuring the backward compatibility of a terminal. According to the method and the device disclosed by the invention, the time sequence relation of relay transmission HARQ is determined according to the uplink and downlink configuration of a subframe supported by the time division duplex (TTD) system and the relay link subframe configuration under the uplink and downlink configuration of the subframe; and an uplink relay subframe and a downlink relay subframe by relay transmission are determined according to the relay link subframe configuration. According to the method and the device disclosed by the invention, the reliability of data transmission of the relay link can be effectively ensured and the transmission efficiency of the HARQ is ensured; and meanwhile, according to the invention, the influence on data transmission of a subordinate terminal of a relay station can also be avoided and the backward compatibility of the terminal is ensured.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to the HARQ transmission method and the device of the repeated link of tdd systems.
Background technology
The demand for development of mobile communication is to support higher transmission rate, more perfect signal to cover and higher resource utilization.Relaying (Relay) technology can increase covering and balance, increase cell throughout; And relay station is than the base station; Has less relatively deployment cost; Therefore relaying is regarded as Long Term Evolution (Long Term Evolution, evolution system LTE)---senior Long Term Evolution (LTE-Advanced, LTE-A) key technology in the system.
(Time Division Dual, in LTE system TDD), frequency resource is respectively that unit divides in time with the frame at time division duplex.As shown in Figure 1, the length of each radio frames is 10 milliseconds, and it is 1 millisecond subframe that each radio frames comprises 10 length, wherein comprises sub-frame of uplink, descending sub frame and special subframe respectively.Different to proportion of ascending subframe and descending subframe; 7 kinds of subframe configuration structures have been defined altogether in LTE TDD Release-8 (the being called for short Rel-8) system; Proportion of ascending subframe and descending subframe is all inequality in every kind of configuration structure, and system can carry out flexible configuration according to the traffic carrying capacity of up-downgoing in the sub-district.7 kinds of concrete configurations are as shown in table 1, and wherein D representes descending sub frame, and U representes sub-frame of uplink, and S representes special subframe, and the structure of S subframe is as shown in Figure 2.As the evolution system of the TDD LTE that guarantees backwards compatibility, TDD LTE-A system can keep the frame structure identical with TDD LTE.Confirm that at present the subframe uplink- downlink configuration 0 and 5 shown in the table 1 is not supported relay transmission in LTE-A TDD Release-10 (being called for short Rel-10).
Subframe uplink-downlink configuration form in the table 1TDD LTE system
HARQ (Hybrid-Automatic Repeat Request mixes automatic repeat requests) is an error control method important in the block transmission system, can effectively improve transmission reliability.In the LTE/LTE-A system, the ascending HARQ transmission is defining a series of transmission time sequences, comprising: transmitting uplink data and descending affirmation or non-affirmation (Acknowledge/Negative Acknowledge, ACK/NACK) feedback information sequential; Descending ACK/NACK feedback and uplink data retransmission sequential etc.
In TDD LTE-A system, introduce after the relay station, be equivalent to the transmission of data many a jumping, variation has taken place in the communication pattern at promptly original base station-terminal.With the double bounce system is example, and the communication pattern of accepting the terminal of relay station service becomes the mode at base station-relay station-terminal.At this time; Just need in the uplink and downlink resource, to divide respectively the communication resource (corresponding interface also be referred to as Un interface) of a part as base station-relay station; Promptly mark a part of subframe and be used for the communication of base station-relay station, these subframes are called as relay sub-frame (or Un subframe).For downlink relay sub-frame; Relay station indicates that it is the MBSFN subframe to subordinate Rel-8 terminal; And do not go in the resource of Rel-8 terminal outside the control domain of MBSFN subframe to receive, thereby guarantee relay station compatibility for the Rel-8 terminal when carrying out descending the reception.For uplink relay subframe, through the uplink service of subordinate terminal not being dispatched, the relay station subordinate terminal is also in up emission when avoiding the up emission of relay station.But, for the transfer of data that misaligns the station subordinate terminal that continues impacts, and can guarantee need the HARQ transmission time sequence of repeated link to be defined the reliability transmitted between base station and the relay station.
In the correlation technique, also do not consider the detailed problem of the HARQ transmission time sequence of base station-relay station communication at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of repeated link HARQ transmission method and device of tdd systems, and repeated link HARQ sequential can rationally be set, and has guaranteed the backwards compatibility for the terminal.
For achieving the above object, technical scheme of the present invention is achieved in that
The repeated link HARQ transmission method of a kind of TDD system, this method comprises:
For the subframe uplink-downlink configuration of supporting relay transmission in the TDD system,, confirm the HARQ sequential relationship of relay transmission according to the uplink relay subframe under the said subframe uplink-downlink configuration and the position of downlink relay sub-frame;
Carry out the HARQ transmission according to the HARQ sequential relationship of said relay transmission.
Further, this method is to the subframe uplink-downlink configuration 1 in the TDD system, and the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
Further, this method is to the subframe uplink-downlink configuration 2 in the TDD system, and the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
Further, this method is to the subframe uplink-downlink configuration 3 in the TDD system, and the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
Further, this method is to the subframe uplink-downlink configuration 4 in the TDD system, and the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
Further, this method is to the subframe uplink-downlink configuration 6 in the TDD system, and the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=5;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=5 at downlink relay sub-frame n+i;
If receive the repeated link downstream feedback at downlink relay sub-frame n, carry out uplink retransmission, wherein m=5 at uplink relay subframe n+m.
Further, the downstream feedback of said repeated link upstream data is carried through indication of the new data in the uplink authorization (UL grant) (NDI) and/or repeated link HARQ indicating channel (R-PHICH).
Based on said method, the present invention also proposes a kind of repeated link HARQ transmitting device of tdd systems, and this device comprises:
HARQ sequential determination module is used for supporting the position of uplink relay subframe and downlink relay sub-frame under the subframe uplink-downlink configuration of relay transmission to confirm the HARQ sequential relationship of relay transmission according to the TDD system;
The HARQ transport module is used for carrying out the HARQ transmission according to the HARQ sequential relationship of the definite said relay transmission of said HARQ sequential determination module.
To subframe uplink-downlink configuration in the TDD system 1,2,3 or 4, the HARQ sequential relationship of the relay transmission that said HARQ sequential determination module is confirmed is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m;
To subframe uplink-downlink configuration 6 in the TDD system, the HARQ sequential relationship of the relay transmission that said HARQ sequential determination module is confirmed is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=5;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=5 at downlink relay sub-frame n+i;
If receive the repeated link downstream feedback at downlink relay sub-frame n, carry out uplink retransmission, wherein m=5 at uplink relay subframe n+m.
During the downstream feedback of the underway link upstream data that continues of said HARQ transport module, through NDI among the ULgrant and/or the said downlink feedback information of R-PHICH channel bearing.
HARQ transmission method through above-mentioned has effectively guaranteed the repeated link reliability of data transmission; Guaranteed the efficient of HARQ transmission; Simultaneously, the inventive method has been avoided the influence for the HARQ sequential of relay station subordinate terminal, has guaranteed the backwards compatibility for the terminal.
Description of drawings
Fig. 1 is a LTE system wireless frame structure sketch map;
Fig. 2 is a TDD LTE system special subframe structural representation;
Fig. 3 is the relay sub-frame configuration sketch map of TDD system subframe uplink-downlink configuration 1;
Fig. 4 is the relay sub-frame configuration sketch map of TDD system subframe uplink-downlink configuration 2;
Fig. 5 is the relay sub-frame configuration sketch map of TDD system subframe uplink-downlink configuration 3;
Fig. 6 is the relay sub-frame configuration sketch map of TDD system subframe uplink-downlink configuration 4;
Fig. 7 is the relay sub-frame configuration sketch map of TDD system subframe uplink-downlink configuration 6;
Fig. 8 is the schematic flow sheet of the repeated link HARQ transmission method of TDD of the present invention system;
Fig. 9 is the repeated link HARQ transmitting device structure chart of a kind of tdd systems of the present invention.
Embodiment
Basic thought of the present invention is: the HARQ sequential relationship of relay transmission confirms that according to the repeated link sub-frame configuration under subframe uplink-downlink configuration of being supported in the TDD system and the said subframe uplink-downlink configuration described repeated link sub-frame configuration has been confirmed the uplink relay subframe and the downlink relay sub-frame of relay transmission.The present invention can effectively guarantee the repeated link reliability of data transmission, guarantee the efficient of HARQ transmission; Simultaneously, the present invention can also avoid the influence for the transfer of data of relay station subordinate terminal, guarantees the backwards compatibility for the terminal.
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
Generally speaking, business data transmission need satisfy processing delay with the transmission time sequence of corresponding ACK/NACK feedback information.Be after receiving terminal receives business datum, need enough processing times to carry out demodulation, decode and carry out CRC operations such as (Cyclic Redundant Check, CRCs), could confirm should be to transmitting terminal feeding back ACK or nack message.In LTE, it is generally acknowledged the minimum 4ms of being of this feedback delay, promptly after subframe n receives data, generally satisfy and feed back more than or equal to the subframe of n+4 in subframe position.Therefore, repeated link HARQ sequential also need be followed this principle.On the other hand, the definition of HARQ sequential should be considered the time delay fed back, and promptly the interval of business data transmission and respective feedback message transmission can not be too big, and too conference causes the time delay of professional transmission to increase, and causes the propagation delay time at the following terminal of relay station to increase then.
Fig. 8 has provided the flow chart of the repeated link HARQ transmission method of tdd systems of the present invention, specifically comprises the steps:
The present invention is at first according to the subframe uplink-downlink configuration in the TDD LTE/LTE-A system, and is as shown in table 1, determines the position that can be used as the up-downgoing relay sub-frame.Owing to confirm that subframe uplink- downlink configuration 0 and 5 is not supported relay transmission in Rel-10 at present, so the embodiment of the invention only describes to remaining configuration.In addition, in Rel-10TDD Relay, subframe 0,1,5,6 can not be configured to relay sub-frame.
After confirming the position of up-downgoing relay sub-frame according in the position of uplink relay subframe and downlink relay sub-frame and the LTE system to the requirement of feedback delay and retransmission delay time, confirm the HARQ sequential relationship of relay transmission; The face description that sequential is fed back and retransmitted in 1,2,3,4,6 configurations down to the subframe uplink-downlink configuration as follows of the HARQ sequential relationship of concrete relay transmission.
The HARQ sequential relationship of step 2, the said relay transmission of foundation is carried out the HARQ transmission.
Specify the inventive method according to the subframe uplink-downlink configuration in the TDD LTE/LTE-A system in the table 1 below.
Subframe uplink-downlink configuration 1
Subframe uplink-downlink configuration 1 time, because the restriction of MBSFN sub-frame configuration has only descending sub frame 4 and 9 can be configured to downlink relay sub-frame.If subframe 4 and 9 is configured to downlink relay sub-frame, can subframe 8 and 3 be configured to uplink relay subframe so, this configuration mode is minimum for the influence of the HARQ sequential relationship of relay station subordinate terminal.The relay sub-frame configuration situation is as shown in Figure 3.Here be stressed that relay sub-frame configuration shown in Figure 3 is just explained the repeated link HARQ sequence problem that the present invention describes as a preferred disposition situation, is not the unique relay sub-frame configuration mode under this subframe uplink-downlink configuration.
Under relay sub-frame configuration shown in Figure 3; Uplink service for transmission in the uplink relay subframe 3; According to the inventive method; Its descending ACK/NACK feedback information can only transmit in downlink relay sub-frame 9 or in the downlink relay sub-frame 4 of next radio frames, otherwise will cause the downlink feedback information of repeated link correctly to receive.If but will cause feedback delay excessive in downlink relay sub-frame 4 transmission of next radio frames, therefore preferably feed back in the downlink relay sub-frame 9 of current wireless frame.For the uplink service in the uplink relay subframe 8, its downstream feedback can be considered feedback delay in the relay sub-frame 4 or 9 transmission of next radio frames equally, preferably transmits in the uplink relay subframe 4 of next radio frames.For above-mentioned sequential relationship, summing up gets up is exactly: at downlink relay sub-frame n the repeated link upstream data that receives at uplink relay subframe n-k is carried out downstream feedback, wherein k=6; Perhaps: relay station sends the repeated link upstream data at uplink relay subframe n, receives corresponding downstream feedback, said i=6 at downlink relay sub-frame n+i.
The another one HARQ sequential relationship relevant with uplink is the sequential relationship of downlink feedback information transmission and uplink retransmission.For subframe uplink-downlink configuration 1; According to the HARQ sequential relationship of above-mentioned definition, if the sequential relationship of uplink and downstream feedback is defined as n-k, k=6; Can the sequential relationship of uplink retransmission be defined as n+4 so; Promptly receive the repeated link downstream feedback, carry out uplink retransmission, m=4 at uplink relay subframe n+m at downlink relay sub-frame n.So both satisfied the data processing time delay, guaranteed also that the head biography and the retransmit interval of ascending HARQ was comparatively reasonable.
Subframe uplink-downlink configuration 2
Subframe uplink-downlink configuration 2 times, descending sub frame 3,4,8 and 9 can be configured to downlink relay sub-frame.If subframe 3 or 3 is configured to downlink relay sub-frame with the subframe 9 of a last radio frames, can subframe 7 be configured to uplink relay subframe so, this configuration mode is minimum for the influence of the HARQ sequential relationship of relay station subordinate terminal; Equally, if subframe 8 or subframe 8 and 4 are configured to downlink relay sub-frame, can the subframe 2 of next radio frames be configured to uplink relay subframe so, relay sub-frame configuration is less for the HARQ sequential relationship influence of relay station subordinate terminal in this case.Be configured to downlink relay sub-frame with subframe 4 and 8, subframe 2 is configured to uplink relay subframe and is example explanation the inventive method, and is as shown in Figure 4.Here be stressed that relay sub-frame configuration shown in Figure 4 is just explained the repeated link HARQ sequence problem that the present invention describes as a preferred disposition situation, is not the unique relay sub-frame configuration mode under this subframe uplink-downlink configuration.
Under relay sub-frame configuration shown in Figure 4; Uplink service for transmission in the uplink relay subframe 2; According to the inventive method; Its descending ACK/NACK feedback information can only transmit in downlink relay sub-frame 8 or in the downlink relay sub-frame 4 of next radio frames, otherwise will cause the downlink feedback information of repeated link correctly to receive.If but will cause feedback delay excessive in 4 transmission, therefore preferably in 8 feedbacks.When subframe 3 or 3 and 9 is configured to downlink relay sub-frame, the HARQ sequential can similarly obtain when subframe 7 was configured to uplink relay subframe.For above-mentioned sequential relationship, summing up gets up is exactly: at downlink relay sub-frame n the repeated link upstream data that receives at uplink relay subframe n-k is carried out downstream feedback, wherein k=6; Perhaps: relay station sends the repeated link upstream data at uplink relay subframe n, receives corresponding downstream feedback, said i=6 at downlink relay sub-frame n+i.
The another one HARQ sequential relationship relevant with uplink is the sequential relationship of downlink feedback information transmission and uplink retransmission.For subframe uplink-downlink configuration 2; According to the HARQ sequential relationship of above-mentioned definition, if the sequential relationship of uplink and downstream feedback is defined as n-k, k=6; Can the sequential relationship of uplink retransmission be defined as n+4 so; Promptly receive the repeated link downstream feedback, carry out uplink retransmission, m=4 at uplink relay subframe n+m at downlink relay sub-frame n.So both satisfied the data processing time delay, guaranteed also that the head biography and the retransmit interval of ascending HARQ was comparatively reasonable.
Subframe uplink-downlink configuration 3
Subframe uplink-downlink configuration 3 times, descending sub frame 7,8 and 9 can be configured to downlink relay sub-frame.If subframe 7,8 and 9 is configured to downlink relay sub-frame, can subframe 2 and 3 be configured to uplink relay subframe so, this configuration mode is minimum for the influence of the HARQ sequential relationship of relay station subordinate terminal.Suppose relay sub-frame configuration situation is as shown in Figure 5.Here be stressed that relay sub-frame configuration shown in Figure 5 is just explained the repeated link HARQ sequence problem that the present invention describes as a preferred disposition situation, is not the unique relay sub-frame configuration mode under this subframe uplink-downlink configuration.
Under relay sub-frame configuration shown in Figure 5; Uplink service for transmission in the uplink relay subframe 2,3; According to the inventive method, its descending ACK/NACK feedback information can only transmit in downlink relay sub-frame 8 or 9, otherwise will cause the downlink feedback information of repeated link correctly to receive.For example, the downlink feedback information of uplink service can all transmit in subframe 8 or subframe 9 in the subframe 2,3, also can transmission in subframe 8 and 9 respectively.Preferably the feedback information with subframe 2,3 uplink services separately transmits in different subframes, and for example the downlink feedback information of subframe 2 uplink is in subframe 8 transmission, and the feedback information of subframe 3 uplink services is in subframe 9 transmission.For above-mentioned sequential relationship, summing up gets up is exactly: at downlink relay sub-frame n the repeated link upstream data that receives at uplink relay subframe n-k is carried out downstream feedback, wherein k=6; Perhaps: relay station sends the repeated link upstream data at uplink relay subframe n, receives corresponding downstream feedback, said i=6 at downlink relay sub-frame n+i.
The another one HARQ sequential relationship relevant with uplink is the sequential relationship of downlink feedback information transmission and uplink retransmission.For subframe uplink-downlink configuration 3; According to the HARQ sequential relationship of above-mentioned definition, if the sequential relationship of uplink and downstream feedback is defined as n-k, k=6; Can the sequential relationship of uplink retransmission be defined as n+4 so; Promptly receive the repeated link downstream feedback, carry out uplink retransmission, m=4 at uplink relay subframe n+m at downlink relay sub-frame n.So both satisfied the data processing time delay, guaranteed also that the head biography and the retransmit interval of ascending HARQ was comparatively reasonable.
Subframe uplink-downlink configuration 4
Subframe uplink-downlink configuration 4 times, descending sub frame 4,7,8 and 9 can be configured to downlink relay sub-frame, and subframe 2 and 3 can be configured to uplink relay subframe.Suppose relay sub-frame configuration situation is as shown in Figure 6.Here be stressed that relay sub-frame configuration shown in Figure 6 is just explained the repeated link HARQ sequence problem that the present invention describes as a preferred disposition situation, is not the unique relay sub-frame configuration mode under this subframe uplink-downlink configuration.
Under relay sub-frame configuration shown in Figure 6; Uplink service for transmission in the uplink relay subframe 3; According to the inventive method, its descending ACK/NACK feedback information can only transmit in downlink relay sub-frame 7 or 9, otherwise will cause the downlink feedback information of repeated link correctly to receive.For example, the downlink feedback information that limits subframe 3 uplink is in subframe 9 transmission.If subframe 2 and 8 also is configured to relay sub-frame, the descending ACK/NACK feedback information that can limit subframe 2 uplink is in subframe 8 transmission.For above-mentioned sequential relationship, summing up gets up is exactly: at downlink relay sub-frame n the repeated link upstream data that receives at uplink relay subframe n-k is carried out downstream feedback, wherein k=6; Perhaps: relay station sends the repeated link upstream data at uplink relay subframe n, receives corresponding downstream feedback, said i=6 at downlink relay sub-frame n+i.
The another one HARQ sequential relationship relevant with uplink is the sequential relationship of downlink feedback information transmission and uplink retransmission.For subframe uplink-downlink configuration 4; According to the HARQ sequential relationship of above-mentioned definition, if the sequential relationship of uplink and downstream feedback is defined as n-k, k=6; The sequential relationship of uplink retransmission is defined as n+4 so; Promptly receive the repeated link downstream feedback, carry out uplink retransmission, m=4 at uplink relay subframe n+m at downlink relay sub-frame n.So both satisfied the data processing time delay, guaranteed also that the head biography and the retransmit interval of ascending HARQ was comparatively reasonable.
Subframe uplink-downlink configuration 6
Subframe uplink-downlink configuration 6 times, have only descending sub frame 9 can be configured to downlink relay sub-frame.If 9 are configured to downlink relay sub-frame, can subframe 4 be configured to uplink relay subframe so, this configuration mode is less for the influence of the HARQ sequential relationship of relay station subordinate terminal.Suppose relay sub-frame configuration situation is as shown in Figure 7.Here be stressed that relay sub-frame configuration shown in Figure 7 is just explained the repeated link HARQ sequence problem that the present invention describes as a preferred disposition situation, is not the unique relay sub-frame configuration mode under this subframe uplink-downlink configuration.
Under relay sub-frame configuration shown in Figure 7; Uplink service for transmission in the uplink relay subframe 4; According to the inventive method, its descending ACK/NACK feedback information can only transmit in downlink relay sub-frame 9, otherwise will cause the downlink feedback information of repeated link correctly to receive.For above-mentioned sequential relationship, summing up gets up is exactly: at downlink relay sub-frame n the repeated link upstream data that receives at uplink relay subframe n-k is carried out downstream feedback, wherein k=5; Perhaps: relay station sends the repeated link upstream data at uplink relay subframe n, receives corresponding downstream feedback, said i=5 at downlink relay sub-frame n+i.
The another one HARQ sequential relationship relevant with uplink is the sequential relationship of downlink feedback information transmission and uplink retransmission.For subframe uplink-downlink configuration 6; According to the HARQ sequential relationship of above-mentioned definition, if the sequential relationship of uplink and downstream feedback is defined as n-k, k=5; The sequential relationship of uplink retransmission is defined as n+5 so; Promptly receive the repeated link downstream feedback, carry out uplink retransmission, m=5 at uplink relay subframe n+m at downlink relay sub-frame n.So both satisfied the data processing time delay, guaranteed also that the head biography and the retransmit interval of ascending HARQ was comparatively reasonable.
The descending ACK/NACK feedback information of repeated link can be indicated through the NDI in the repeated link uplink authorization (ULgrant) (New Data Indication, new data indication).If 1 streams of code words of UL grant dispatching uplink transmission, the NDI among this UL grant is 1 bit so, can get 0 and 1 value; If 2 streams of code words of UL grant dispatching uplink transmission, the NDI among this UL grant is 2 bits so, and corresponding 1 streams of code words of per 1 bit can be got 0 and 1 value.If use NDI to indicate, not direct representation of NDI ACK or nack message, but represent that through 1 bit 1 streams of code words of uplink scheduling is to retransmit or first the biography.If scheduling is to retransmit, represent error of transmission last time (NACK) so, otherwise expression transmission last time correct (ACK).The use of concrete NDI is identical with the NDI use among the UL grant that sends to the terminal, repeats no more here.
The repeated link downstream feedback also can be sent in the HARQ indication through repeated link, described HARQ indication be carried on generally speaking repeated link HARQ indicating channel (Relay-Physical HARQIndicator Channel, R-PHICH).The PHICH channel of repeated link can adopt with to the identical processing mode of the PHICH of terminal transmission, repeat no more here.
Fig. 9 is the repeated link HARQ transmitting device structure chart of a kind of tdd systems of the present invention's proposition; The repeated link HARQ transmission method of the tdd systems that this device is used to realize that the present invention proposes, this device comprises: HARQ sequential determination module, HARQ transport module;
Said HARQ sequential determination module is used for confirming according to the position of uplink relay subframe under the subframe uplink-downlink configuration of TDD system support relay transmission and downlink relay sub-frame the HARQ sequential relationship of relay transmission;
Owing to confirm that subframe uplink- downlink configuration 0 and 5 is not supported relay transmission in Rel-10 at present, so the embodiment of the invention only describes to subframe uplink- downlink configuration 1,2,3,4,6.Said HARQ sequential determination module according in the position of uplink relay subframe and downlink relay sub-frame and the LTE system to the requirement of feedback delay and retransmission delay time, confirm the HARQ sequential relationship of relay transmission; The HARQ sequential relationship of the concrete relay transmission face that sees before is directed against the explanation of subframe uplink- downlink configuration 1,2,3,4,6, repeats no more here.
Said HARQ transport module is used for carrying out the HARQ transmission according to the HARQ sequential relationship of the definite said relay transmission of said HARQ sequential determination module.During the downstream feedback of the underway link upstream data that continues of said HARQ transport module, through NDI among the UL grant and/or the said downlink feedback information of R-PHICH channel bearing.
In sum; Repeated link HARQ transmission method that the present invention describes and device have effectively guaranteed the repeated link reliability of data transmission; Guaranteed the efficient of HARQ transmission, avoided influence simultaneously, guaranteed backwards compatibility for the terminal for the HARQ sequential of relay station subordinate terminal.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection range of the present invention.
Claims (10)
1. the repeated link of a time division duplex (TDD) system mixes automatic repeat requests (HARQ) transmission method, it is characterized in that this method comprises:
For the subframe uplink-downlink configuration of supporting relay transmission in the TDD system,, confirm the HARQ sequential relationship of relay transmission according to the uplink relay subframe under the said subframe uplink-downlink configuration and the position of downlink relay sub-frame;
Carry out the HARQ transmission according to the HARQ sequential relationship of said relay transmission.
2. method according to claim 1 is characterized in that, to the subframe uplink-downlink configuration 1 in the TDD system, the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
3. method according to claim 1 is characterized in that, to the subframe uplink-downlink configuration 2 in the TDD system, the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
4. method according to claim 1 is characterized in that, to the subframe uplink-downlink configuration 3 in the TDD system, the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
5. method according to claim 1 is characterized in that, to the subframe uplink-downlink configuration 4 in the TDD system, the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m.
6. method according to claim 1 is characterized in that, to the subframe uplink-downlink configuration 6 in the TDD system, the HARQ sequential relationship of said relay transmission is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=5;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=5 at downlink relay sub-frame n+i;
If receive the repeated link downstream feedback at downlink relay sub-frame n, carry out uplink retransmission, wherein m=5 at uplink relay subframe n+m.
7. according to each described method of claim 2 to 6, it is characterized in that,
The downstream feedback of said repeated link upstream data is carried through indication of the new data in the uplink authorization (UL grant) (NDI) and/or repeated link HARQ indicating channel (R-PHICH).
8. the repeated link HARQ transmitting device of a tdd systems is characterized in that this device comprises:
HARQ sequential determination module is used for supporting the position of uplink relay subframe and downlink relay sub-frame under the subframe uplink-downlink configuration of relay transmission to confirm the HARQ sequential relationship of relay transmission according to the TDD system;
The HARQ transport module is used for carrying out the HARQ transmission according to the HARQ sequential relationship of the definite said relay transmission of said HARQ sequential determination module.
9. device according to claim 8 is characterized in that, to subframe uplink-downlink configuration in the TDD system 1,2,3 or 4, the HARQ sequential relationship of the relay transmission that said HARQ sequential determination module is confirmed is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=6;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=6 at downlink relay sub-frame n+i;
If relay station receives the repeated link downstream feedback at downlink relay sub-frame n, then carry out uplink retransmission, wherein m=4 at uplink relay subframe n+m;
To subframe uplink-downlink configuration 6 in the TDD system, the HARQ sequential relationship of the relay transmission that said HARQ sequential determination module is confirmed is specially:
At downlink relay sub-frame n the repeated link upstream data that receives at said uplink relay subframe n-k is carried out downstream feedback, wherein, k=5;
If relay station sends the repeated link upstream data at uplink relay subframe n, then receive corresponding downstream feedback, wherein i=5 at downlink relay sub-frame n+i;
If receive the repeated link downstream feedback at downlink relay sub-frame n, carry out uplink retransmission, wherein m=5 at uplink relay subframe n+m.
10. according to Claim 8 or 9 described devices, it is characterized in that,
During the downstream feedback of the underway link upstream data that continues of said HARQ transport module, through NDI among the ULgrant and/or the said downlink feedback information of R-PHICH channel bearing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010255846.1A CN102377550B (en) | 2010-08-13 | 2010-08-13 | The repeated link HARQ transmission method of a kind of tdd systems and device |
| PCT/CN2011/076441 WO2012019494A1 (en) | 2010-08-13 | 2011-06-27 | Relay link hybrid automatic repeat request (harq) transmission method and apparatus in a time division dual system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010255846.1A CN102377550B (en) | 2010-08-13 | 2010-08-13 | The repeated link HARQ transmission method of a kind of tdd systems and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102377550A true CN102377550A (en) | 2012-03-14 |
| CN102377550B CN102377550B (en) | 2016-06-15 |
Family
ID=45567351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010255846.1A Active CN102377550B (en) | 2010-08-13 | 2010-08-13 | The repeated link HARQ transmission method of a kind of tdd systems and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102377550B (en) |
| WO (1) | WO2012019494A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420682A (en) * | 2010-09-28 | 2012-04-18 | 中兴通讯股份有限公司 | Relay link downlink feedback information transmission sequence determination method and apparatus thereof |
| WO2018024088A1 (en) * | 2016-08-05 | 2018-02-08 | 中兴通讯股份有限公司 | Information indication method, device and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090185479A1 (en) * | 2006-10-02 | 2009-07-23 | Fujitsu Limited | Communication Systems |
| CN101730115A (en) * | 2008-10-24 | 2010-06-09 | 华为技术有限公司 | Relay transmission method and device |
| CN101741452A (en) * | 2008-11-07 | 2010-06-16 | 华为技术有限公司 | Relay transmission method and network node |
-
2010
- 2010-08-13 CN CN201010255846.1A patent/CN102377550B/en active Active
-
2011
- 2011-06-27 WO PCT/CN2011/076441 patent/WO2012019494A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090185479A1 (en) * | 2006-10-02 | 2009-07-23 | Fujitsu Limited | Communication Systems |
| CN101730115A (en) * | 2008-10-24 | 2010-06-09 | 华为技术有限公司 | Relay transmission method and device |
| CN101741452A (en) * | 2008-11-07 | 2010-06-16 | 华为技术有限公司 | Relay transmission method and network node |
Non-Patent Citations (1)
| Title |
|---|
| ALCATEL-LUCENT SHANGHAI BELL等: "《3GPP TSG-RAN WG1 #60 R1-100948》", 26 February 2010 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420682A (en) * | 2010-09-28 | 2012-04-18 | 中兴通讯股份有限公司 | Relay link downlink feedback information transmission sequence determination method and apparatus thereof |
| CN102420682B (en) * | 2010-09-28 | 2016-04-13 | 中兴通讯股份有限公司 | Downlink feedback information for trunk link transmission time sequence defining method and device |
| WO2018024088A1 (en) * | 2016-08-05 | 2018-02-08 | 中兴通讯股份有限公司 | Information indication method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102377550B (en) | 2016-06-15 |
| WO2012019494A1 (en) | 2012-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102461004B (en) | Data communication method and device in communication system | |
| US8358608B2 (en) | Method and apparatus for HARQ operation with network coding | |
| US9025573B2 (en) | Introducing a delay in the transmission of a nack for a packet received employing coordinated multi-point transmission | |
| CN101567774B (en) | Method and device for achieving multi-subframe joint scheduling | |
| CN102437904B (en) | Time division duplex system and downstream feedback method of repeated link thereof | |
| EP2991258A1 (en) | Controlling a transmission of information in a wireless communication network with a relay node | |
| EP2209245A1 (en) | A hybrid automatic repeat request method of the downstream tunnel | |
| WO2012020918A1 (en) | Method and device for transmitting/receiving data in wireless communication system supporting relay node | |
| CN101461168A (en) | Retransmission apparatus and method in wireless relay communication system | |
| CN101567773B (en) | Method, system and device for sending data in time division duplex system | |
| CN103378953B (en) | Mixed automatic retransmission request method and device | |
| CN101931960B (en) | Method for avoid uplink transmission conflict, system and device | |
| CN101882985A (en) | Indicating method for sending hybrid automatic repeat request (HARQ) and base station thereof | |
| CN101888661B (en) | Wireless communication method, system and device | |
| CN101383685A (en) | Downlink hybrid automatic retransmission method, system and apparatus | |
| CN101615951A (en) | The transmission timing method and the device of uplink authorization signaling | |
| CN102231662A (en) | Data transmission method and apparatus thereof | |
| CN101902777B (en) | Hybrid automatic repeat request (HARQ) method and base station equipment | |
| CN101877881B (en) | Wireless communication method, system and device thereof | |
| CN101388742A (en) | Data transmission method, system and device in relay system | |
| CN102377544A (en) | Retransmission method in communication system | |
| CN101547069B (en) | Method, system and device for transmission of data receiving feedback signals | |
| CN102420682B (en) | Downlink feedback information for trunk link transmission time sequence defining method and device | |
| CN102474391A (en) | Method and apparatus for controlling data retransmission in wireless relay network | |
| CN104427550A (en) | Method and apparatus for transmitting uplink data in a business flow self-adaption system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |