CN101656604A - Method and device for realizing hybrid automatic repeat request - Google Patents
Method and device for realizing hybrid automatic repeat request Download PDFInfo
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Abstract
Embodiment of the invention provides a method and device for realizing hybrid automatic repeat request, wherein the method for realizing hybrid automatic repeat request comprises determining channel number of a subframe of repeat-request data in a wireless data frame; mapping the channel number of the subframe of the repeat-request data to a subframe of retransmitting the data. The channel numberof the subframe of the repeat-request data is identical with that of the subframe of the repeat-request data, thereby preventing complex channel sequential processing.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of implementation method and device that mixes automatic re-transmission.
Background technology
LTE (Long Term Evolution, Long Term Evolution) is air interface and the Radio Access Network standard that 3GPP (Third GenerationPartnership Project, third generation partner program) formulates.In the LTE system, adopted HARQ (Hybrid Automatic RepeatRequest mixes automatic repeat requests) technology to send and the receiving radio data frame.HARQ is the combined errors control mode in conjunction with FEC (Forward Error Correction, forward error correction coding) and ARQ (AutomaticRepeat ReQuest, repeat requests automatically).
The main implementation procedure of HARQ comprises: transmitting terminal sends new data, and receiving terminal carries out buffer memory and separates code check the data of receiving, sends to transmitting terminal according to check results and determines (Ack) or the non-feedback information of determining (Nack).If transmitting terminal is received definite feedback information, then begin to send new data; If transmitting terminal is received non-deterministic feedback information, illustrate that then transmitting terminal sends the data transmission and makes mistakes, transmitting terminal need resend the error data of last time, and receiving terminal merges decoding with data retransmission of receiving and error data last time in the buffer memory, solves correct data.
As shown in Figure 1, the structure of the 10ms wireless data frame in the LTE system in the prior art.In the LTE system, TDD (Time Division Duplex, time division duplex) structure of the wireless data frame under the pattern has following characteristics: a 10ms wireless data frame comprises the field of 2 5ms, each field is made up of five subframes, and each subframe correspondence continues the running time-frequency resource of 1ms on full bandwidth.In the LTE system, the subframe that is used for transmitting uplink data is called sub-frame of uplink, U represents with symbol, the subframe that is used for downlink data transmission is called descending sub frame, D represents with symbol, also have the conversion subframe at descending sub frame in the middle of the conversion of sub-frame of uplink, maybe can be called special subframe, S represents with symbol.(the Guard Period of GP in the special subframe; the protection interval) running time-frequency resource is deducted as the conversion time slot from the descending sub frame to the sub-frame of uplink; UpPTS (Uplink Pilot Time Slot; uplink pilot time slot) Bu Fen time-frequency; resource is used for transmitting uplink data; the running time-frequency resource of DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot) part is used for downlink data transmission.
Subframe is the base unit of transfer of data of eating dishes without rice or wine, further, LTE has defined the data structure of passage (or process), passage has write down with relevant TB (the Transport Block of each subframe, data transmission block) and user's information, be the realization carrier that carries out the transfer of data of subframe, the corresponding subframe of passage, subframe has subframe numbers, and passage has channel number.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
In mixing automatic retransmission processes, there is complicated passage sequential processing.
Summary of the invention
Embodiments of the invention provide a kind of implementation method and device that mixes automatic re-transmission, and the processing of its passage sequential is simple.
Embodiments of the invention provide a kind of implementation method of mixing automatic re-transmission, comprising:
Determine just to pass in the wireless data frame channel number of the subframe of data;
The channel number that just passes the subframe of described data is shone upon to the subframe that retransmits described data.
Based on the implementation method that above-mentioned mixing retransmits automatically, embodiments of the invention provide a kind of implement device that mixes automatic re-transmission, comprising:
The channel number determining unit is used for determining that wireless data frame just passes the channel number of the subframe of data;
The channel number map unit, the channel number that is used for just passing the subframe of described data shines upon to the subframe that retransmits described data.
The technical scheme that is provided by the embodiment of the invention described above is as can be seen: because it is identical with the channel number of data retransmission subframe just to pass the channel number of data burst, make that the processing of passage sequential is fairly simple.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those skilled in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the wireless data frame structural representation under the LTE system TDD mode in the prior art;
Fig. 2 mixes the schematic flow sheet one of the implementation method that retransmits automatically for the embodiment of the invention;
Fig. 3 mixes the structural representation one of the implement device that retransmits automatically for the embodiment of the invention;
Fig. 4 mixes the structural representation two of the implement device that retransmits automatically for the embodiment of the invention;
Fig. 5 mixes the schematic flow sheet two of the implementation method that retransmits automatically for the embodiment of the invention;
Fig. 6 mixes the structural representation three of the implement device that retransmits automatically for the embodiment of the invention;
Fig. 7 mixes the schematic diagram that extracts sequence of subframes in the implementation method that retransmits automatically in lines for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those skilled in the art belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
In mixing automatic retransmission processes, just pass data, feedback information, sequential relationship of three operation existence of data retransmission, this sequential is subjected to the wireless data frame structure and just passes the time interval factor affecting such as (ms) of subframe of the subframe of the subframe of data, feedback information, data retransmission that (this time interval need be satisfied the subframe that just passes data, the subframe of feedback information, the minimum interval of the subframe of data retransmission).Fix if just pass the sequential relationship of data and data retransmission, when transmitting terminal just passed data, receiving terminal just can determine to retransmit the subframe of these data, and the mixing that this re-transmission mode is referred to as the method for synchronization retransmits automatically; If there is not fixing sequential between transmission data and the data retransmission, after transmitting terminal just passed data, receiving terminal can not be determined the subframe of data retransmission, and the mixing that this re-transmission mode is called asynchronous system retransmits automatically.
Among the present invention, used term " just passes data ", " just passing the subframe of data " and " data retransmission ", " subframe of data retransmission " are done following understanding, if data send failure and need transmission again, " just pass data " and refer to this data re-transmission state before, data retransmission refers to the state in this data re-transmission.The subframe that is used to retransmit these data is the subframe of data retransmission, and the subframe that sends these data before retransmitting is for just passing the subframe of data.Be appreciated that at the beginning of each descending sub frame, sub-frame of uplink and special subframe both can be used for to pass data, also can be used for data retransmission.
Embodiment one
As shown in Figure 2, Fig. 2 comprises for the embodiment of the invention provides a kind of schematic flow sheet that mixes the implementation method of automatic re-transmission:
Step 21: the channel number of determining just to pass in the wireless data frame subframe of data.
Step 22: the channel number that will just pass the subframe of described data shines upon to the subframe that retransmits described data.
In specific implementation, can pre-defined subframe and channel number between mapping relations, for example based on the subframe of wireless data frame is carried out serial number, with the channel number of wireless data frame and the frame number foundation order mapping relations of the subframe in the wireless data frame.Thereby in step 21, can determine just to pass the channel number of the subframe of data according to the subframe numbers of first biography data.In the step 22, obtain just passing after the channel number of subframe of data, the channel number that just passes the subframe of data is shone upon subframe to data retransmission.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, passage is the realization carrier that subframe is carried out transfer of data, in the prior art, the subframe of data retransmission is different with the passage that the subframe that just passes data is used, thereby data link layer is just passing in the process of data and data retransmission, need repeatedly search the sequential of passage, cause the passage sequential processing comparatively complicated.And the method that present embodiment provides, just passing data shines upon identical channel number with the subframe of data retransmission, can simplify the processing of passage sequential greatly.
Be understandable that, in step 22, the channel number that just passes the subframe of data shone upon subframe to data retransmission, can upset channel number mapping order, make the frame number of the subframe in channel number and the wireless data frame shine upon in the mode of backward.
Optionally, the embodiment of the invention is mixed the implementation method that retransmits automatically, can also comprise:
Retransmit described data by the subframe identical with the subframe type of the described data of first biography.
Subframe comprises the sub-frame of uplink that is used for transmitting uplink data, is used for the descending sub frame of downlink data transmission, the special subframe in the middle of the conversion of descending sub frame and sub-frame of uplink.As shown in Figure 1, the running time-frequency resource of GP is deducted as the conversion time slot from the descending sub frame to the sub-frame of uplink in the special subframe, and the running time-frequency resource of UpPTS is used for transmitting uplink data, and the running time-frequency resource of DwPTS is used for downlink data transmission.Be different from special subframe, sub-frame of uplink and descending sub frame unification are called common subframe.
During downlink data transmission, be descending sub frame if the base station just passes the subframe of data, the base station retransmits described data by descending sub frame; If it is special subframe that the base station just passes the subframe of data, the base station retransmits described data by special subframe.
Need to prove, in the prior art during downlink data transmission, be that descending sub frame and special subframe are mixed consideration, and the running time-frequency resource of special subframe lacks than descending sub frame, cause the data block that just passes by descending sub frame to retransmit, thereby have the defective that increases data delay by special subframe.The implementation method that the mixing that the embodiment of the invention provides retransmits automatically, the data that just pass on the descending sub frame still retransmit by descending sub frame, the data that just pass by special subframe still retransmit by special subframe, make the time delay of data re-transmission to expect, help stablizing data throughout.
Need to prove that also during transmitting uplink data, because the running time-frequency resource that upstream data takies is less, special subframe can be realized the data block that sub-frame of uplink just passes is retransmitted by special subframe substantially.Not using the embodiment of the invention to mix the implementation method that retransmits automatically but do not get rid of, is special subframe if just pass the subframe of described data, retransmits described data by special subframe; If just passing the subframe of data is sub-frame of uplink, retransmit described data by sub-frame of uplink.
The executive agent that the embodiment of the invention is mixed the implementation method that retransmits automatically can be the base station.In order to discern the subframe type that just passes data, the base station can be according to the subframe numbers of first biography data, and the wireless data frame ratio of uplink subframe to downlink subframe, determines just to pass the subframe type of data.
If realize the method that present embodiment provides in base station side, no matter re-transmission mode is the method for synchronization or asynchronous system, no matter ratio of uplink subframe to downlink subframe is selected which kind of structure of agreement regulation wireless data frame structure for use, because it is identical with the channel number of data retransmission subframe just to pass the channel number of data burst, the L2 of base station side (data link layer) does not need to look into the sequential of getting channel number that just passes subframe and the channel number that retransmits subframe, has avoided the passage sequential processing of base station side L2 complexity.
Embodiment two
As shown in Figure 3, Fig. 3 is a kind of structural representation that mixes the implement device of automatic re-transmission of the embodiment of the invention, comprising:
Channel number determining unit 31 is used for determining that wireless data frame just passes the channel number of the subframe of data.
Channel number map unit 32, the channel number that is used for just passing the subframe of described data shines upon to the subframe that retransmits described data.
In specific implementation, can pre-defined subframe and channel number between mapping relations, for example based on the subframe of wireless data frame is carried out serial number, with the channel number of wireless data frame and the frame number foundation order mapping relations of the subframe in the wireless data frame.Thereby channel number determining unit 31, can determine the channel number of the subframe of biography data just according to the subframe numbers of first biography data.Channel number map unit 32 obtains just passing after the channel number of subframe of data, and the channel number that just passes the subframe of data is shone upon subframe to data retransmission.
The technical scheme that is provided by the embodiment of the invention described above is as can be seen: passage is the realization carrier that subframe is carried out transfer of data, in the prior art, the subframe of data retransmission is different with the passage that the subframe that just passes data is used, thereby data link layer is just passing in the process of data and data retransmission, need repeatedly search the sequential of passage, cause the passage sequential processing comparatively complicated.And the device that present embodiment provides, just passing data shines upon identical channel number with the subframe of data retransmission, can simplify the processing of passage sequential greatly.
Be understandable that channel number map unit 32 is shone upon subframe to data retransmission with the channel number that just passes the subframe of data, can upset channel number mapping order, make the frame number of the subframe in channel number and the wireless data frame shine upon in the mode of backward.
As shown in Figure 4, optionally, the implement device that the mixing of the embodiment of the invention retransmits automatically can also comprise:
Subframe comprises the sub-frame of uplink that is used for transmitting uplink data, is used for the descending sub frame of downlink data transmission, the special subframe in the middle of the conversion of descending sub frame and sub-frame of uplink.As shown in Figure 1, the running time-frequency resource of GP is deducted as the conversion time slot from the descending sub frame to the sub-frame of uplink in the special subframe, and the running time-frequency resource of UpPTS is used for transmitting uplink data, and the running time-frequency resource of DwPTS is used for downlink data transmission.Be different from special subframe, sub-frame of uplink and descending sub frame can unify to be called common subframe.
Optionally, data re-transmission unit 33 can comprise:
Perhaps, second retransmission unit 332 is common subframe if be used for just passing the subframe of described data, retransmits described data by common subframe.
Need to prove, in the prior art during downlink data transmission, be that descending sub frame and special subframe are mixed consideration, and the running time-frequency resource of special subframe lacks than descending sub frame, cause the data block that just passes by descending sub frame to retransmit, thereby have the defective that increases data delay by special subframe.The implement device that the mixing that the embodiment of the invention provides retransmits automatically, data re-transmission unit 33 still retransmits the data that just pass on the descending sub frame by descending sub frame, data re-transmission unit 33 will still retransmit by special subframe by the data that special subframe just passes, make the time delay of data re-transmission to expect, help stablizing data throughout.
Need to prove that also during transmitting uplink data, because the running time-frequency resource that upstream data takies is less, special subframe can be realized the data block that sub-frame of uplink just passes is retransmitted by special subframe substantially.Not using the embodiment of the invention to mix the implement device that retransmits automatically but do not get rid of, during transmitting uplink data, is special subframe if just pass the subframe of described data, and data re-transmission unit 33 retransmits described data by special subframe; If just passing the subframe of data is sub-frame of uplink, data re-transmission unit 33 retransmits described data by sub-frame of uplink.
It can be the base station that the embodiment of the invention is mixed the implement device that retransmits automatically.In order to discern the subframe type that just passes data, the base station can be according to the subframe numbers of first biography data, and the wireless data frame ratio of uplink subframe to downlink subframe, determines just to pass the subframe type of data.
No matter re-transmission mode is the method for synchronization or asynchronous system, no matter ratio of uplink subframe to downlink subframe is selected which kind of structure of agreement regulation wireless data frame structure for use, because it is identical with the channel number of data retransmission subframe just to pass the channel number of data burst, the L2 of base station side does not need to look into the sequential of getting channel number that just passes subframe and the channel number that retransmits subframe, has avoided the passage sequential processing of base station side L2 complexity.
Embodiment three
As shown in Figure 5, Fig. 5 comprises for the embodiment of the invention provides a kind of schematic flow sheet that mixes the implementation method of automatic re-transmission:
Step 51: after receiving the indication that needs data retransmission, determine just to pass the subframe type of data.
Step 52: retransmit described data by the subframe identical with the subframe type of the described data of first biography.
Optionally, the embodiment of the invention is mixed the implementation method that retransmits automatically, can also comprise:
Step 53: the channel number of determining just to pass in the wireless data frame subframe of data.
Step 54: the channel number that will just pass the subframe of described data shines upon to the subframe that retransmits described data.
The embodiment of the invention is mixed the implementation method that retransmits automatically, can also comprise:
Before the subframe of wireless data frame just passes data, the mapping relations of the passage and the channel number of wireless data frame are set, based on the subframe serial number of wireless data frame, the channel number order is shone upon subframe to first biography data.
For the method that realizes that present embodiment provides, in the step 51, can determine just to pass the subframe type of data according to the ratio of uplink subframe to downlink subframe of wireless data frame and the subframe numbers that just passes data.In the step 53, according to the subframe numbers of first biography data, and the mapping relations between subframe numbers and the channel number, determine the channel number of the subframe of biography data just.
In the step 52, retransmit described data, provide expected time delay, help the stable of data throughout to data re-transmission by the subframe identical with the subframe type of the described data of first biography.
In the step 54, the channel number that just passes the subframe of data is shone upon to the subframe that retransmits described data, avoided complicated passage sequential processing.
Said method can be realized in base station side, also can realize in end side.
Particularly, for base station side, during downlink data transmission, no matter under the mode that the mixing of the method for synchronization or asynchronous system retransmits automatically, make mistakes if just pass data after sending and just passing data in the base station, need resend the data of makeing mistakes, then the terminal indication needs data retransmission, sends non-(Nack, the Negative acknowledgement) information of determining as terminal to the base station example.In step 51, after the base station receives the indication such as non-definite (Nack) information that needs data retransmission, the subframe type of described data can be determined just to pass according to wireless data frame ratio of uplink subframe to downlink subframe and the subframe numbers that just passes data in the base station, is special subframe or descending sub frame.
In the step 52, be descending sub frame if just pass the subframe of data, the base station retransmits described data by descending sub frame; If just passing the subframe of data is special subframe, the base station retransmits described data by special subframe, uses and the identical subframe of subframe type that just passes data, makes the time delay of data re-transmission to expect, helps stablizing data throughout.Avoid causing the data block that just passes by descending sub frame to retransmit, thereby have the defective that increases data delay by special subframe because the running time-frequency resource of special subframe lacks than descending sub frame.
In the step 53, the channel number of the subframe of data is determined just to pass according to the subframe numbers that just passes data in the base station.
In the step 54, the channel number that the base station will just pass the subframe of data shines upon to the subframe that retransmits described data, and the L2 of base station side does not need to look into the sequential of getting channel number that just passes subframe and the channel number that retransmits subframe, has avoided complicated passage sequential processing.
For end side, during transmitting uplink data, in the step 51, terminal receives the indication that needs data retransmission that the base station sends, and as non-definite (Nack, negative acknowledgement) information, terminal need retransmit this data to the base station.Terminal can be according to the wireless data frame ratio of uplink subframe to downlink subframe, and the subframe numbers that just passes data, the subframe type of determining just to pass described data be special subframe still or sub-frame of uplink.
In the step 52, be special subframe if just pass the subframe of data, terminal retransmits described data by special subframe, is sub-frame of uplink if just pass the subframe of data, and terminal retransmits described data by sub-frame of uplink.
Need to prove that terminal is when transmitting uplink data,,, can realize substantially that also the data block that sub-frame of uplink just passes retransmits by special subframe even by the special subframe data retransmission because the running time-frequency resource that upstream data takies is less.
In the step 53, terminal determines just to pass the channel number of the subframe of data according to the subframe numbers that just passes data.
In the step 54, the channel number that terminal will just pass the subframe of data shines upon to the subframe that retransmits described data, has avoided complicated passage sequential processing.
Embodiment four
As shown in Figure 6, Fig. 6 is a kind of structural representation that mixes the implement device of automatic re-transmission that the embodiment of the invention provides, and comprising:
Subframe type determining unit 61 is used for after receiving the indication that needs data retransmission, determines just to pass the subframe type of data.
Optionally, the implement device that the mixing that embodiments of the invention provide retransmits automatically can also comprise:
As shown in Figure 4, channel number determining unit 31 is used for determining that wireless data frame just passes the channel number of the subframe of data.
Channel number map unit 32, the channel number that is used for just passing the subframe of described data shines upon to the subframe that retransmits described data.
The implementation method that can retransmit automatically with reference to the mixing of embodiment three be understood embodiments of the invention and mix the implement device that retransmits automatically, during up, downlink data transmission, how to realize mixing automatic re-transmission, does not give unnecessary details at this.
The technical scheme that is provided by the embodiment of the invention described above is as can be seen: no matter under the method for synchronization or asynchronous system, and which kind of structure no matter ratio of uplink subframe to downlink subframe selects for use agreement to stipulate, because just the channel number of the subframe of biography data is identical with the channel number of the subframe that retransmits described data, has avoided complicated passage sequential processing.And the subframe data retransmission by identical with the subframe type of first biography data provides expected time delay to data re-transmission, helps the stable of data throughout.
Embodiment five
The implement device that the mixing that the foregoing description provides retransmits automatically can be the base station, also can be terminal.
The base station of the embodiment of the invention can realize that the data that just pass still retransmit on subframe of the same type, help the stable of data throughout.And the channel number that just passes data burst is identical with the channel number of data retransmission subframe, avoids the passage sequential processing of the L2 complexity of base station side.
The terminal of the embodiment of the invention can help the stable of data throughout by the subframe data retransmission identical with the subframe type of first biography data.Help the stable of data throughout.And the channel number that just passes data burst is identical with the channel number of data retransmission subframe, avoids complicated passage sequential processing.
Embodiment six
Referring to wireless data frame structure shown in Figure 1, and, the implementation method that embodiment of the invention mixing retransmits automatically is described in conjunction with the schematic diagram that extracts sequence of subframes as shown in Figure 7 in lines.Wherein, transmitting terminal can be the base station, and receiving terminal can be terminal.
Wireless data frame structure shown in Figure 1,10ms radio frames comprise 10 subframes, and subframe numbers is 0～9, wherein subframe 0, subframe 4, subframe 5, subframe 9 is descending sub frames, and D represents with symbol, and subframe 1 and subframe 6 are special subframes, S represents with symbol, subframe 2, subframe 3, subframe 7, subframe 8 is sub-frame of uplink, and U represents with symbol.Can know, special subframe 1 and special subframe 6 can be used for downlink data transmission, special subframe 1 and special subframe 6 can be considered as descending special subframe, like this, in the 10ms radio frames, sub-frame of uplink is 4, and it is 6 that descending sub frame adds special subframe, be that sub-frame of uplink and the proportioning that is used for the subframe of downlink transfer are 2: 3, abbreviate ascending-descending subframes as and join.
Figure 7 shows that under the method for synchronization, wireless data frame structure based on ratio of uplink subframe to downlink subframe shown in Figure 1, wherein, just pass the minimum interval of the subframe of the subframe of data and feedback information, and the minimum interval of the subframe of the subframe of feedback information and data retransmission all is 4ms.
Among Fig. 7, the tactic subframe numbers of first behavior (subframe numbers as if corresponding to LTE agreement regulation need be used for 10 deliverys), subframe numbers is 0～49 in 50ms; Second behavior is based on wireless data frame structure shown in Figure 6, and symbol D is a descending sub frame, and symbol U is a sub-frame of uplink, and symbol S is a special subframe; The third line is a channel number, and subframe numbers 0～10 comprises 7 default down going channels, respective channel number 0～6, and down going channel comprises the passage of descending sub frame correspondence and the passage of descending special subframe correspondence; Fourth line to the ten row are the sequence of subframes that extract from second row, can reflect that the subframe of data retransmission and the sequential relationship and the channel number of the subframe that just passes data concern that wherein, symbol D is a descending sub frame, symbol S is a special subframe, and symbol A is the sub-frame of uplink of band feedback.
Below with under the method for synchronization, downlink data transmission, it is example that the subframe that just passes subframe, the data retransmission of data is descending sub frame, illustrates that the embodiment of the invention mixes the implementation method that retransmits automatically:
To be transmitting terminal just pass the descending sub frame of data to receiving terminal to first symbol of fourth line D, and its subframe numbers 0, the channel number of mapping are 0.Symbol A is whether receiving terminal is determined to receive to the first data that pass of transmitting terminal feedback in the fourth line, can be definite (Ack, acknowledgement), perhaps non-definite (Nack, negative acknowledgement) is 4ms owing to just pass data burst with the minimum interval that feeds back subframe, and the radio frames ratio of uplink subframe to downlink subframe is 2: 3 a frame format, so, among Fig. 7, can be that subframe numbers is the transmitting terminal that feeds back to of 7 sub-frame of uplink A transmitting and receiving terminal.
Particularly, if transmitting terminal receives that the feedback information of receiving terminal for determining that then transmitting terminal begins just to pass new data, is non-definite if transmitting terminal is received the feedback information of receiving terminal, then transmitting terminal need retransmit wrong data.
When the transmitting terminal data retransmission, according to ratio of uplink subframe to downlink subframe is that 2: 3 frame format and the minimum interval that feeds back the subframe of subframe and data retransmission are 4ms, the subframe data retransmission of selection and first symbol of fourth line D same type, promptly the subframe of data retransmission also is a descending sub frame.Like this, it is that 14 descending sub frame and subframe numbers are 15 descending sub frame that the descending sub frame that satisfies condition has subframe numbers at least.According to the subframe of selecting corresponding data retransmission between the subframe that same type a plurality of is just passed data according to the sequencing of first biography data, then subframe numbers is that 14 descending sub frame can be used for retransmitting the first biography data that subframe numbers is 0 descending sub frame, and subframe numbers to be 15 descending sub frame can be used for retransmits the first biography data that the 6th row subframe numbers is 4 descending sub frame.Like this, the re-transmission of descending sub frame and special subframe does not mix consideration, the first biography The data descending sub frame of descending sub frame is done re-transmission, avoided in the prior art,, can't on special subframe, obtain retransmitting in the data block that just passes on the descending sub frame because the running time-frequency resource of special subframe lacks than descending sub frame, thereby increase data delay, the stable defective that is unfavorable for data throughout, the embodiment of the invention is mixed the implementation method that retransmits automatically, can provide expected time delay to data re-transmission.
Further, after the subframe of above-mentioned data retransmission is determined, the channel number that just passes the subframe of described data can be shone upon, make the subframe of data retransmission identical with the channel number of the subframe that just passes data to the subframe that retransmits described data.
Among Fig. 7, the channel number 0 that just passes the subframe (subframe numbers is 0) of data is shone upon with subframe (subframe numbers the is 14) formation of data retransmission, like this, the channel number of the subframe of data retransmission also is 0, and the subframe channel number of the first biography of realization data is identical with the subframe channel number of data retransmission.The embodiment of the invention is mixed the implementation method that retransmits automatically, avoided in the prior art, the subframe of data retransmission is different with the passage that the subframe that just passes data is used, thereby data link layer is just passing in the process of data and data retransmission, need repeatedly search the sequential of passage, cause the passage sequential processing comparatively complicated.And the method that present embodiment provides, just passing data shines upon identical channel number with the subframe of data retransmission, can simplify the processing of passage sequential greatly.
Again with under the method for synchronization, downlink data transmission, it is example that the subframe that just passes subframe, the data retransmission of data is descending special subframe, illustrates that the embodiment of the invention mixes the implementation method that retransmits automatically:
Among Fig. 7, to be transmitting terminal just pass the descending special subframe of data to receiving terminal to first symbol of fifth line S, and its subframe numbers is 1, and channel number is 1.Can be that subframe numbers is that 7 sub-frame of uplink A sends and feeds back to transmitting terminal.
When the transmitting terminal data retransmission, according to ratio of uplink subframe to downlink subframe is that 2: 3 frame format and the minimum interval that feeds back the subframe of subframe and data retransmission are 4ms, selecting the subframe of data retransmission is and the subframe of first symbol of fifth line S same type that promptly the subframe of data retransmission also is descending special subframe.Same type a plurality of are just passed the subframe of selecting corresponding data retransmission between the subframe of data according to the sequencing of first biography data, then the subframe numbers of second symbol S of fifth line indication is that 11 descending special subframe can be used for data retransmission.Like this, the first biography The data special subframe of special subframe is done re-transmission, realizes that the automatic re-transmission of mixing of descending sub frame and special subframe does not mix, and can provide expected time delay to data re-transmission.
And, after the subframe of above-mentioned data retransmission is determined, in like manner also the channel number that just passes the subframe of described data can be shone upon to the subframe that retransmits described data, make the subframe of data retransmission identical with the channel number of the subframe that just passes data, among Fig. 7, the channel number 1 that just passes the descending special subframe (subframe numbers is 1) of data is shone upon with descending special subframe (subframe numbers the is 11) formation of data retransmission, like this, the channel number of the descending special subframe of data retransmission also is 1, the channel number that just passes subframe is identical with the channel number that retransmits subframe, has simplified and has mixed the processing that retransmits passage sequential when realizing automatically.
His subframe of other Xingqi just passes the sequential of data burst, data retransmission subframe and channel number mapping among Fig. 7, in like manner as can be known, does not do at this and to give unnecessary details.
Can also know, among Fig. 7, owing in a 10ms radio frames 6 descending sub frames (comprising 2 special subframes) are arranged, so, in 50ms (subframe numbers 0～49), have 30 (6 * 5=30) descending sub frames.And, in 50ms, have 7 down going channels (passage that comprises descending special subframe correspondence), channel number is 0～6, the passage of descending special subframe correspondence (channel number 1,4) respectively has been scheduled 5 times, because totally 2 special subframes, promptly dispatched altogether 2 * 5=10 time, the passage of descending sub frame correspondence (channel number 1,2,3,5,6) respectively has been scheduled 4 times, because totally 5 descending sub frames have promptly been dispatched 4 * 5=20 time, so altogether, the number of times that special subframe and descending sub frame are scheduled is 30, just in time takes 30 descending sub frames.As seen, at 50ms in the cycle, down going channel number forms mapping with the mode of backward and the subframe numbers of data retransmission.Interim in the next 50ms cycle, new one circulation of taking turns repetition appears in the mapping relations of subframe and channel number.
In like manner as can be known, the embodiment of the invention is mixed the implementation method that retransmits automatically, can also realize that the first biography The data sub-frame of uplink of sub-frame of uplink does re-transmission, and it is identical just to pass the sub-frame of uplink channel number of the sub-frame of uplink channel number of data and data retransmission, does not do at this and give unnecessary details.
Should be known in that mixing automatic retransmission technique is present in other wireless communication protocol except that the LTE agreement, therefore use mixing that other communication system of mixing retransmission technique also can be suitable for the foregoing description implementation method or the device of re-transmission automatically.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in one or more computer read/write memory mediums, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random AccessMemory, RAM) etc.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (9)
1, a kind of implementation method of mixing automatic re-transmission is characterized in that, comprising:
Determine just to pass in the wireless data frame channel number of the subframe of data;
The channel number that just passes the subframe of described data is shone upon to the subframe that retransmits described data.
2, the automatic implementation method that retransmits of mixing according to claim 1 is characterized in that described method also comprises:
Retransmit described data by the subframe identical with the subframe type of the described data of first biography.
3, the automatic implementation method that retransmits of mixing according to claim 1 and 2, described subframe comprises:
Common subframe or special subframe, wherein, common subframe comprises sub-frame of uplink that is used for transmitting uplink data or the descending sub frame that is used for downlink data transmission, special subframe is the conversion subframe between descending sub frame and sub-frame of uplink.
4, the implementation method that automatically retransmits of mixing according to claim 3 is characterized in that, describedly retransmits described data by the subframe identical with the subframe type of the described data of first biography, comprising:
If just passing the subframe of described data is special subframe, retransmit described data by special subframe; Perhaps, be common subframe if just pass the subframe of described data, retransmit described data by common subframe.
5, a kind of implement device that mixes automatic re-transmission is characterized in that, comprising:
The channel number determining unit is used for determining that wireless data frame just passes the channel number of the subframe of data;
The channel number map unit, the channel number that is used for just passing the subframe of described data shines upon to the subframe that retransmits described data.
6, the automatic implement device that retransmits of mixing according to claim 5 is characterized in that described device also comprises:
The data re-transmission unit is used for retransmitting described data by the subframe identical with the subframe type of the described data of first biography.
7, according to claim 5 or the automatic implement device that retransmits of 6 described mixing, it is characterized in that described subframe comprises:
Common subframe or special subframe, wherein, common subframe comprises sub-frame of uplink that is used for transmitting uplink data or the descending sub frame that is used for downlink data transmission, special subframe is the conversion subframe between descending sub frame and sub-frame of uplink.
8, the automatic implement device that retransmits of mixing according to claim 7 is characterized in that described data re-transmission unit comprises:
First retransmission unit, being used for the first subframe that passes described data is special subframe, retransmits described data by special subframe; Perhaps,
Second retransmission unit is common subframe if be used for just passing the subframe of described data, retransmits described data by common subframe.
9, the automatic implement device that retransmits of mixing according to claim 5 is characterized in that described device comprises base station or user terminal.
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| CN200910167248A CN101656604A (en) | 2009-08-27 | 2009-08-27 | Method and device for realizing hybrid automatic repeat request |
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| CN200910167248A CN101656604A (en) | 2009-08-27 | 2009-08-27 | Method and device for realizing hybrid automatic repeat request |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102271034A (en) * | 2010-12-31 | 2011-12-07 | 重庆重邮信科通信技术有限公司 | Long term evolution (LTE) uplink hybrid automatic repeat request (HARQ) control method |
| CN104378182A (en) * | 2013-08-13 | 2015-02-25 | 普天信息技术有限公司 | Method and device for sending downlink data |
| CN105940628A (en) * | 2013-10-30 | 2016-09-14 | 华为技术有限公司 | Hybrid automatic repeat request data decoding method, node device, and decoding system |
| CN106559189A (en) * | 2017-01-16 | 2017-04-05 | 北京邮电大学 | It is a kind of based on the data transmission method of HARQ, apparatus and system |
| CN106941392A (en) * | 2016-01-04 | 2017-07-11 | 中国移动通信集团公司 | A kind of method and apparatus retransmitted |
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2009
- 2009-08-27 CN CN200910167248A patent/CN101656604A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102271034A (en) * | 2010-12-31 | 2011-12-07 | 重庆重邮信科通信技术有限公司 | Long term evolution (LTE) uplink hybrid automatic repeat request (HARQ) control method |
| CN104378182A (en) * | 2013-08-13 | 2015-02-25 | 普天信息技术有限公司 | Method and device for sending downlink data |
| CN105940628A (en) * | 2013-10-30 | 2016-09-14 | 华为技术有限公司 | Hybrid automatic repeat request data decoding method, node device, and decoding system |
| CN106941392A (en) * | 2016-01-04 | 2017-07-11 | 中国移动通信集团公司 | A kind of method and apparatus retransmitted |
| CN106941392B (en) * | 2016-01-04 | 2020-06-09 | 中国移动通信集团公司 | Method and equipment for retransmission |
| CN106559189A (en) * | 2017-01-16 | 2017-04-05 | 北京邮电大学 | It is a kind of based on the data transmission method of HARQ, apparatus and system |
| CN106559189B (en) * | 2017-01-16 | 2019-07-05 | 北京邮电大学 | A kind of data transmission method based on HARQ, apparatus and system |
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