CN102801509A - Method and device for pre-processing data retransmission in LTE (Long Term Evolution) system - Google Patents
Method and device for pre-processing data retransmission in LTE (Long Term Evolution) system Download PDFInfo
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Abstract
The invention provides a method and a device for pre-processing data retransmission in an LTE (Long Term Evolution) system. The problem that an original PDCCH (Physical Downlink Control Channel) is failed to retransmit can be solved. The method comprises the following steps of: determining a quantity of physical resource blocks in the retransmission process, wherein when data is transmitted by being divided into a plurality of transmission blocks, primary transmission is used as original transmission; searching the size of the transmission block instructed by the retransmission process according to a modulation and demodulation method carried in the original transmission and the quantity of the physical resource blocks in the retransmission process; when the transmission block instructed by the retransmission process is consistent to the transmission block instructed by the original transmission in size, judging that the modulation and demodulation method carried in the retransmission process is consistent to the original transmission; and when the transmission block instructed in the retransmission process is inconsistent to the transmission block instructed by the original transmission in size, carrying out modulation and demodulation method for retransmission, ruled by a protocol, in the retransmission process.
Description
Technical field
The application relates to the communication technology, particularly relates to the preprocess method and the device of data re-transmission in a kind of LTE system.
Background technology
Long Term Evolution (Long Term Evolution; LTE) in the system; Downlink data transmission is by Physical Downlink Control Channel (Physical Downlink Control Channel; PDCCH) (Physical Downlink Shared Channel, PDSCH) data are formed for signaling and Physical Downlink Shared Channel.
Data are given the user through the PDSCH Channel Transmission, and then (User Equipment UE) at first carries out blind Detecting to the PDCCH signaling to subscriber equipment; If detect the PDCCH signaling, then obtain the modulation and demodulation method of carrying in the said PDCCH signaling (Modulation and Coding Scheme, MCS); Like MCS9; Through the indicated transmission block of said MCS size (TB Size), read the PDSCH data transmission block (Transport Block, TB); And TB put in the automatic repeat requests buffer memory of corresponding mixing (Hybrid Automatic Repeat Request soft buffer, HARQ soft buffer) resolve.The distribution of in the LTE agreement, having stipulated MCS is 0-31, is carried by the PDCCH signaling when wherein MCS29-31 retransmits, and has stipulated that the TB Size of re-transmission and the TB Size of initial transmission are consistent.
Said re-transmission is meant transmission again, and for example, the PDCCH signaling is sent to behind the user in the base station; Carried MCS9 in the PDCCH signaling; The user detects the PDCCH signaling for various reasons and not, then can be to any data of base station feedback, and then this bust this of base station judges needs to retransmit.After and for example the user receives the PDCCH signaling, resolve the PDSCH data failure, then can be to base station feedback HARQ NACK, this time bust this is judged after receiving user's HARQ NACK in the base station, needing again, transmission promptly retransmits.In the re-transmission, the PDCCH signaling is carried MCS29 in the time of can confirming to retransmit according to modulation system.
But, exist a problem to be in this kind repeating method, if the user does not detect the PDCCH signaling of initial transmission, when this moment, the base station retransmitted the PDCCH signaling of initial transmission, the PDCCH signaling of re-transmission adopted a kind of mode among the MCS29-31.But; Owing to do not get access to the PDCCH signaling of initial transmission, the MCS in the then corresponding PDCCH signaling that can't obtain initial transmission promptly can't be resolved to the TB Size of initial transmission; Therefore when retransmitting, can't parse TB Size, and then cause the data parsing failure.Need to continue the PDCCH signaling of initial transmission is retransmitted, the result remains failure, and when so repeating to reach maximum retransmission, data can be dropped.The user does not receive data all the time.
In sum, prior art the failure problem that the PDCCH signaling to initial transmission retransmits can occur in the LTE system during data re-transmission.
Summary of the invention
The application provides the preprocess method and the device of data re-transmission in a kind of LTE system, to solve the failure problem that initial PDCCH is retransmitted.
In order to address the above problem, the application discloses the preprocess method of data re-transmission in a kind of LTE system, comprising:
According to the physical resource number of blocks of initial transmission, confirm the physical resource number of blocks of this re-transmission, wherein, data are divided into a plurality of transmission blocks when transmitting with primary transmission as initial transmission;
According to the modulation and demodulation method of carrying in the initial transmission, and the physical resource number of blocks of this re-transmission, inquire about this and retransmit indicated transmission block size;
When the indicated transmission block that transmission block is big or small and initial transmission the is indicated size of this re-transmission was consistent, this modulation and demodulation method and initial transmission of carrying when retransmitting was consistent;
When this retransmitted not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, this carried the modulation and demodulation method that is used to retransmit of agreement regulation when retransmitting.
Preferably; Said according to the modulation and demodulation method of carrying in the initial transmission, and the physical resource number of blocks of this re-transmission, inquire about this and retransmit indicated transmission block size; Comprise:, search corresponding transmitting block index number according to the modulation and demodulation method of initial transmission; According to the physical resource number of blocks of said transmitting block index number and this re-transmission, search this and retransmit indicated transmission block size.
Preferably, modulation and transmitting block index concordance list are used to preserve the corresponding relation of modulation and demodulation method, modulation system and transmitting block index number; Said modulation and demodulation method according to initial transmission is searched corresponding transmitting block index number, comprising: the modulation system that is adopted in the modulation and demodulation method of inquiry initial transmission; In modulation and transmitting block index concordance list, search the transmitting block index number of modulation and demodulation method and the said modulation system correspondence of initial transmission.
Preferably, transmission block size table is used to preserve transmitting block index number and physical resource number of blocks, with the corresponding relation of transmission block size; Physical resource number of blocks according to said transmitting block index number and this re-transmission; Search this and retransmit indicated transmission block size; Comprise: in transmission block size table; Search the transmitting block index number transmission block size corresponding, retransmit indicated transmission block size as this with the physical resource number of blocks of this re-transmission.
Preferably; It is said when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated; This carries the modulation and demodulation method that is used to retransmit of agreement regulation when retransmitting; Comprise: when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, the modulation system that is adopted in the modulation and demodulation method of inquiry initial transmission; In modulation and transmitting block index concordance list, search the modulation and demodulation method that is used to retransmit of said modulation system corresponding protocols regulation, the modulation and demodulation method of carrying when retransmitting as this.
Accordingly, disclosed herein as well is the pretreatment unit of data re-transmission in a kind of LTE system, comprising:
The quantity determination module is used for the physical resource number of blocks according to initial transmission, confirms the physical resource number of blocks of this re-transmission;
Enquiry module is used for the modulation and demodulation method of carrying according to initial transmission, and the physical resource number of blocks of this re-transmission, inquires about this and retransmits indicated transmission block size;
First retransmission module is used for when the indicated transmission block that transmission block is big or small and initial transmission the is indicated size of this re-transmission is consistent, and this modulation and demodulation method and initial transmission of carrying when retransmitting is consistent;
Second retransmission module is used for when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, and this carries the modulation and demodulation method that is used to retransmit of agreement regulation when retransmitting.
Preferably, enquiry module comprises:
First searches submodule, is used for the modulation and demodulation method according to initial transmission, searches corresponding transmitting block index number;
Second searches submodule, is used for the physical resource number of blocks according to transmitting block index number and this re-transmission, searches this and retransmits indicated transmission block size.
Preferably, modulation and transmitting block index concordance list are used to preserve the corresponding relation of modulation and demodulation method, modulation system and transmitting block index number;
Said first searches submodule comprises:
Query unit is used for inquiring about the modulation system that the modulation and demodulation method of initial transmission is adopted;
Search the unit, be used for, search the transmitting block index number of modulation and demodulation method and the said modulation system correspondence of initial transmission at modulation and transmitting block index concordance list.
Preferably, transmission block size table is used for transmitting block index number and physical resource number of blocks, with the corresponding relation of transmission block size;
Said second searches submodule, is used at transmission block size table, searches the transmitting block index number transmission block size corresponding with the physical resource number of blocks of this re-transmission, retransmits indicated transmission block size as this.
Preferably, said second retransmission module comprises:
The inquiry submodule is used for when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, the modulation system that is adopted in the modulation and demodulation method of inquiry initial transmission;
Search submodule, be used for, search the modulation and demodulation method that is used to retransmit of said modulation system corresponding protocols regulation, the modulation and demodulation method of carrying when retransmitting as this at modulation and transmitting block index concordance list.
Compared with prior art, the application comprises following advantage:
At first; The application can confirm in the preliminary treatment that retransmits by the MCS that carries in according to initial transmission in advance; And resulting this of the PRB quantity of this re-transmission retransmit indicated TB Size, and whether consistent thereby can detect this if retransmitting the indicated TB Size of indicated TB Size and initial transmission.When this retransmits the indicated TB Size of indicated TB Size and initial transmission when consistent; Can't parse the problem that retransmits indicated TB Size for fear of the re-transmission that causes because losing the PDCCH signaling to initial transmission; Guarantee simultaneously to obtain to merge and gain; This MCS that carries when retransmitting can be consistent with initial transmission, thereby can guarantee that the user can parse the indicated TB Size of re-transmission, successfully receives data.When inconsistent, merge gain in order to obtain, can when retransmitting, the PDCCH signaling carry a kind of mode among the MCS29-31.
Secondly, the application can through modulation and transmitting block index concordance list, according to the MCS of initial transmission, search corresponding TBS Index according to the regulation of agreement when confirming the TB Size of this re-transmission; Through transmission block size table,, search this and retransmit corresponding TB Size then according to the PRB quantity of said TBS Index and this re-transmission.Thereby make the process of tabling look-up through twice, just can confirm indicated TB Size, method is fairly simple, the saving resource.
Once more, the application is guaranteeing still to use a kind of mode among the MCS29-31 for other re-transmission under the situation about can not fail to the re-transmission of initial transmission, gains thereby guaranteed can obtain equally to merge.
Description of drawings
Fig. 1 is the preprocess method flow chart of data re-transmission in the said a kind of LTE of the application embodiment system;
Fig. 2 is a query transmission block size flow chart in the preprocess method of data re-transmission in the said a kind of LTE of the application embodiment system;
Fig. 3 is the said transmitting block index flow chart of searching of the application's preferred embodiment;
Fig. 4 is the repeating method flow chart of the said TB Size of the application's preferred embodiment when inconsistent;
Fig. 5 is the pretreatment unit structure chart of data re-transmission in the said a kind of LTE of the application embodiment system;
Fig. 6 is the pretreatment unit structure chart of data re-transmission in the said a kind of LTE of the application's preferred embodiment system.
Embodiment
For above-mentioned purpose, the feature and advantage that make the application can be more obviously understandable, the application is done further detailed explanation below in conjunction with accompanying drawing and embodiment.
After certain downlink data transmission; When corresponding sub-frame of uplink receives user's HARQ ACK, for example do not received HARQ NACK, and for example do not received any feedback at corresponding sub-frame of uplink; Confirm that this transmission needs to retransmit, can at first obtain the PRB quantity of initial transmission this moment.Wherein, can be after the success of end side parsing PDSCH data to base station feedback HARQ ACK, end side can not detect the PDCCH signaling as if end side to base station feedback HARQ NACK after resolving the PDSCH data failure, then can be to any data of base station feedback.
The base station is not receiving feedback, or after receiving the HARQ NACK of feedback, confirms that this initial transmission needs to retransmit.Wherein, if retransmit owing to PDSCH data parsing failure is caused, wherein resolving failure maybe be owing to reasons such as PDSCH data disappearance cause.Need guarantee when retransmitting that then the indicated TB Size of indicated TB Size of this re-transmission and initial transmission is consistent; After the follow-up data that receive re-transmission; Just can the PDSCH data of PDSCH data that retransmit and initial transmission be merged and resolve; Just can obtain and merge gain, the success rate that raising is resolved.
To merge gain in order obtaining, to have stipulated in the LTE agreement that PDCCH information is carried a kind of mode among the MCS29-31 when retransmitting, said MCS29-31 sign retransmits the consistent of indicated TB Size and initial transmission.But the problem that this kind repeating method exists is, if the user does not detect the PDCCH signaling of initial transmission, correspondence can't be obtained the MCS in the PDCCH signaling of initial transmission, promptly can't be resolved to the indicated TB Size of initial transmission.When retransmitting, adopt a kind of mode among the MCS29-31, promptly need retransmit the indicated TB Size of indicated TB Size and initial transmission and be consistent.But owing to be not resolved to the TB Size of initial transmission, then can't parse the TB Size of re-transmission, the result remains failure, and the user does not receive data all the time.
The application provides the preprocess method of data re-transmission in a kind of LTE system; Can confirm in advance according to the MCS that carries in the initial transmission; And the PRB quantity of this re-transmission obtain this retransmit indicated TB Size, whether consistent with the TB Size that initial transmission is indicated.If inconsistent, then merge gain in order to obtain, can when retransmitting, the PDCCH signaling carry a kind of mode among the MCS29-31.If consistent, being consistent can obtain to merge of the MCS that carries when then retransmitting and initial transmission gained, and even the PDCCH signaling is carried MCS9 during initial transmission, and then the PDCCH signaling is also carried MCS9 in the re-transmission of initial transmission.Thereby can guarantee that the user can parse the indicated TB Size of re-transmission, successfully receives data.
Following mask body is discussed the described method of the application:
With reference to Fig. 1, provided the preprocess method flow chart of data re-transmission in the said a kind of LTE of the application embodiment system.
Wherein, when carrying out transfer of data among the LTE, uplink and downlink time-frequency domain physical resource is formed Physical Resource Block, and (Physical Resource Block PRB), dispatches and distributes as physical resource unit.Be mapped on the Physical Resource Block after the processing such as the scrambling of data transmission block process, modulation, layer mapping, precoding.
According to the PRB quantity of initial transmission, and the available resources in the system, can pick out the PRB that uses in this re-transmission, and then confirm the PRB quantity of this re-transmission.Can be in the actual treatment with the PRB quantity of initial transmission; PRB quantity as this re-transmission; But when the quantity of the above-mentioned PRB that picks out surpasses the PRB quantity of initial transmission; Can the quantity of PRB be revised, quantity is modified to the PRB quantity of initial transmission, even the PRB quantity of this re-transmission equates with the PRB quantity of initial transmission.
According to the MCS that carries in the initial transmission, and the PRB quantity of this re-transmission, just can inquire according to resulting this of above-mentioned two conditions and retransmit indicated TB Size according to the regulation in the LTE agreement.
For example, the PDCCH signaling is carried MCS9 in the initial transmission, and the PRB quantity of above-mentioned this re-transmission is 3, and then according to the LTE agreement, can inquire and retransmit indicated TB Size according to determined this of MCS9 and PRB quantity=3 is 456.
Since retransmit indicated TB Size usually and the indicated TB Size of initial transmission be consistent; Therefore the failure problem in the PDCCH signaling of initial transmission being retransmitted in the prior art, whether can detecting this, to retransmit the indicated TB Size of indicated TB Size and initial transmission consistent.Whether for example go up and confirmed in the example that this retransmits indicated TB Size is 456, then detecting the indicated TB Size of initial transmission is 456.
If it is consistent that promptly this retransmits the indicated TB Size of indicated TB Size and initial transmission, then follow-up execution in step 14; If not, it is inconsistent that promptly this retransmits the indicated TB Size of indicated TB Size and initial transmission, then follow-up execution in step 15.
When the TB of this re-transmission Size is consistent with the TB Size of initial transmission; Carry the arbitrary mode among the MCS29-31 for fear of generation; Can't parse the problem of the TB Size of re-transmission, in order to obtain the merging gain of re-transmission as far as possible, this MCS that carries when retransmitting can be consistent with initial transmission simultaneously; Even the PDCCH signaling is carried MCS9 during initial transmission, and the PDCCH signaling was also carried MCS9 during then this retransmitted.Thereby can guarantee that the user can parse the TB Size of re-transmission, successfully receives data.
When the TB of the TB of this re-transmission Size and initial transmission Size is inconsistent; This carries the modulation and demodulation method that is used to retransmit of agreement regulation when retransmitting; The PDCCH signaling that is this re-transmission is carried a kind of mode among the MCS29-31, merges gain so that obtain.
For re-transmission; The TB Size indicated like PDCCH is identical with the TB Size of last transmission; End side just can merge parsing with the data that retransmit and the data of initial transmission so, merges gain thereby obtain, so the application can also guarantee to obtain the merging gain.
In sum; The MCS that the application carries in the preliminary treatment that retransmits, can confirming by initial transmission in advance; And resulting this of the PRB quantity of this re-transmission retransmit indicated TB Size, and whether consistent thereby can detect this if retransmitting the indicated TB Size of indicated TB Size and initial transmission.When this retransmits the indicated TB Size of indicated TB Size and initial transmission when consistent; Can't parse the problem that retransmits indicated TB Size for fear of the terminal because lose the PDCCH signaling; Guarantee simultaneously to obtain to merge and gain; This MCS that carries when retransmitting can be consistent with initial transmission, thereby can guarantee that the user can parse the TB Size of re-transmission, successfully receives data.When inconsistent, merge gain in order to obtain, can when retransmitting, the PDCCH signaling carry a kind of mode among the MCS29-31.
With reference to Fig. 2, provided query transmission block size flow chart in the preprocess method of data re-transmission in the said a kind of LTE of the application embodiment system.
Preferably, said according to the modulation and demodulation method of carrying in the initial transmission, and the physical resource number of blocks of this re-transmission, the transmission block size of inquiring about this re-transmission comprises:
Step 121 according to the MCS of initial transmission, is searched corresponding TBS Index;
In order to obtain the TB Size of this re-transmission, at first to obtain TBS Index, then can search the corresponding TBS Index of said MCS according to the MCS of initial transmission.
Preferably; Regulation according to the LTE agreement; The application also comprises modulation and transmitting block index concordance list (Modulation and TBS index table for PDSCH); Be used to preserve the corresponding relation of modulation and demodulation method, modulation system and transmitting block index number (Transport Block Size Index, TBS Index).
The distribution of having stipulated MCS in the LTE agreement is 0-31, wherein, and the MCS that the PDCCH signaling was carried when MCS0-28 was non-re-transmission the, the MCS that the PDCCH signaling was carried when MCS29-31 was re-transmission.
Said modulation and transmitting block index concordance list shape are as shown in table 1:
Table 1
The modulation system that MCS0-28 is respectively corresponding in the table 1 and transmitting block index number have shown this modulation system and transmitting block index in transmitting number, can know the 3rd for any two through wherein.Corresponding separately modulation system among the MCS29-31, but transmitting block index number locates to be reserved, stipulates in the agreement that promptly carry MCS29-31 in the PDCCH signaling, indicated TB Size is consistent with initial transmission.
In most cases, it is consistent that the TB Size of TB Size that suitable PRB resource and MCS guarantee to be resolved to and initial transmission can be found in the base station when retransmitting.But also have some special circumstances, the TB Size and the initial transmission that can cause retransmitting are inconsistent, for example; Owing to when downlink data transmission occurs in the special subframe scheduling, need multiply by 0.75 to PRB quantity and adjust, then if the PRB of system is resource-constrained; And initial transmission occurs in conventional subframe scheduling; Occur in the special subframe scheduling and retransmit, so if carry a kind of mode among the MCS0-28 when retransmitting, the TB Size that just can't guarantee to parse and the TB Size of initial transmission are consistent.
Therefore, the LTE agreement has stipulated that MCS29-31 is the MCS that the PDCCH signaling is carried when retransmitting, and is promptly consistent with initial transmission TB Size through carrying MCS29-31 can guarantee that the user parses when retransmitting TB Size.
With reference to Fig. 3, provided the said transmitting block index flow chart of searching of the application's preferred embodiment.
Then step 121 specifically comprises:
In order to obtain TBS Index; At first will inquire about the modulation system that is adopted among the MCS of initial transmission, MCS and modulation system are unique correspondences, and the MCS when therefore obtaining initial transmission can obtain the corresponding modulation mode; As in the table 1 if that carry is MCS9 in the initial transmission, then modulation system is 2.
Above-mentioned get access to said modulation system after, can inquire about said modulation and transmitting block index concordance list, search the corresponding TBS Index of MCS and said modulation system of initial transmission.For example, initial transmission be MCS9, said modulation system is 2, then can know that through question blank 1 TBS Index is 9.
Step 122 according to the PRB quantity of said TBS Index and this re-transmission, is searched this and is retransmitted corresponding TB Size.
Above-mentioned get access to TBS Index after, can search this and retransmit corresponding TB Size according to the PRB quantity of TBS Index and this re-transmission.
Preferably, according to the regulation of LTE agreement, the application also comprises transmission block size table (Transport block size table), is used to preserve TBS Index and PRB quantity, and with the corresponding relation of TB Size, said transmission block size table shape is as shown in table 2:
Table 2
Then in the transmission block size table through LTE agreement regulation, can find corresponding TB Size jointly, retransmit indicated TB Size as this through the PRB quantity of the above-mentioned TBS Index that finds and this re-transmission.For example, getting access to TBS Index through question blank 1 in the last example is 9, and the PRB quantity of said this re-transmission is 3, and then can find corresponding TB Size is 456.
In sum, the application can through modulation and transmitting block index concordance list, according to the MCS of initial transmission, search corresponding TBS Index according to the regulation of agreement when confirming the TB Size of this re-transmission; Through transmission block size table,, search this and retransmit corresponding TB Size then according to the PRB quantity of said TBS Index and this re-transmission.Thereby make the process of tabling look-up through twice, just can confirm indicated TB Size, method is fairly simple, the saving resource.
With reference to Fig. 4, provided the repeating method flow chart when the said TB Size of the application's preferred embodiment is inconsistent.
Preferably, saidly retransmit the indicated TB Size of indicated TB Size and initial transmission when inconsistent when this, this carries the MCS that is used to retransmit that agreement is stipulated when retransmitting, comprising:
Step 151 when this retransmits the indicated TB Size of indicated TB Size and initial transmission when inconsistent, is inquired about the modulation system that is adopted among the MCS of initial transmission;
When the TB of the TB of this re-transmission Size and initial transmission Size is inconsistent; Because the MCS that the PDCCH signaling was carried when regulation MCS29-31 was re-transmission in the LTE agreement; After the TB Size meeting when confirming that according to above-mentioned steps this retransmits use MCS0-28 indication and the TB Size of initial transmission are inconsistent; Can adopt a kind of mode among the MCS29-31 according to the regulation in the LTE agreement, with the merging gain that guarantees as far as possible to retransmit.
Confirm to adopt which kind of mode among the MCS29-31, at first will confirm the modulation system of initial transmission, then will inquire about the modulation system that is adopted among the MCS of initial transmission, like modulation system 2.
Step 152 in modulation and transmitting block index concordance list, is searched the MCS that is used to retransmit of said modulation system corresponding protocols regulation, the MCS that carries when retransmitting as this.
Because the MCS that the PDCCH signaling was carried when regulation MCS29-31 was re-transmission in the LTE agreement, promptly MCS29-31 is exactly the MCS that is used to retransmit of agreement regulation.Therefore confirming to adopt a kind of mode among the MCS29-31; After the modulation system that is adopted among the MCS of initial transmission; Promptly can inquire about modulation and transmitting block index concordance list, search concrete which kind of mode among the corresponding MCS29-31 of said modulation system, like modulation system 2; Corresponding MCS29, the MCS that carries when then MCS29 is this re-transmission.
Therefore; The LTE agreement has stipulated that MCS29-31 is the MCS that the PDCCH signaling is carried when retransmitting; Promptly can guarantee that through carrying MCS29-31 the indicated TB Size of user indicated TB Size and initial transmission when retransmitting is consistent, gain thereby guaranteed to obtain equally merging.
With reference to Fig. 5, provided the pretreatment unit structure chart of data re-transmission in the said a kind of LTE of the application embodiment system.
Accordingly, the application also provides the pretreatment unit of data re-transmission in a kind of LTE system, comprising: quantity determination module 11, enquiry module 12, first retransmission module 13 and second retransmission module 14, wherein:
With reference to Fig. 6, provided the pretreatment unit structure chart of data re-transmission in the said a kind of LTE of the application's preferred embodiment system.
Preferably, enquiry module 12 comprises:
First searches submodule 121, is used for the modulation and demodulation method according to initial transmission, searches corresponding transmitting block index number;
Second searches submodule 122, is used for the physical resource number of blocks according to transmitting block index number and this re-transmission, searches this and retransmits indicated transmission block size.
Preferably, described device also comprises: modulation and transmitting block index concordance list are used to preserve the corresponding relation of modulation and demodulation method, modulation system and transmitting block index number;
Said first searches submodule 121 comprises:
Query unit is used for inquiring about the modulation system that the modulation and demodulation method of initial transmission is adopted;
Search the unit, be used for, search the transmitting block index number of modulation and demodulation method and the said modulation system correspondence of initial transmission at modulation and transmitting block index concordance list.
Preferably, described device also comprises: transmission block size table is used for transmitting block index number and physical resource number of blocks, with the corresponding relation of transmission block size;
Said second searches submodule 122, is used at transmission block size table, searches the transmitting block index number transmission block size corresponding with the physical resource number of blocks of this re-transmission, retransmits indicated transmission block size as this.
Preferably, said second retransmission module 14 comprises:
For system embodiment, because it is similar basically with method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
The application can describe in the general context of the computer executable instructions of being carried out by computer, for example program module.Usually, program module comprises the routine carrying out particular task or realize particular abstract, program, object, assembly, data structure or the like.Also can in DCE, put into practice the application, in these DCEs, by through communication network connected teleprocessing equipment execute the task.In DCE, program module can be arranged in this locality and the remote computer storage medium that comprises memory device.
At last; Also need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, commodity or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, commodity or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises said key element and also have other identical element.
More than to the preprocess method and the device of data re-transmission in the application provided a kind of LTE system; Carried out detailed introduction; Used concrete example among this paper the application's principle and execution mode are set forth, the explanation of above embodiment just is used to help to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to the application's thought, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the application.
Claims (10)
1. the preprocess method of data re-transmission in the LTE system is characterized in that, comprising:
According to the physical resource number of blocks of initial transmission, confirm the physical resource number of blocks of this re-transmission, wherein, data are divided into a plurality of transmission blocks when transmitting with primary transmission as initial transmission;
According to the modulation and demodulation method of carrying in the initial transmission, and the physical resource number of blocks of this re-transmission, inquire about this and retransmit indicated transmission block size;
When the indicated transmission block that transmission block is big or small and initial transmission the is indicated size of this re-transmission was consistent, this modulation and demodulation method and initial transmission of carrying when retransmitting was consistent;
When this retransmitted not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, this carried the modulation and demodulation method that is used to retransmit of agreement regulation when retransmitting.
2. method according to claim 1 is characterized in that, and is said according to the modulation and demodulation method of carrying in the initial transmission, and the physical resource number of blocks of this re-transmission, inquires about this and retransmits indicated transmission block size, comprising:
According to the modulation and demodulation method of initial transmission, search corresponding transmitting block index number;
According to the physical resource number of blocks of said transmitting block index number and this re-transmission, search this and retransmit indicated transmission block size.
3. method according to claim 2 is characterized in that, also comprises: modulation and transmitting block index concordance list are used to preserve the corresponding relation of modulation and demodulation method, modulation system and transmitting block index number;
Said modulation and demodulation method according to initial transmission is searched corresponding transmitting block index number, comprising:
The modulation system that is adopted in the modulation and demodulation method of inquiry initial transmission;
In modulation and transmitting block index concordance list, search the transmitting block index number of modulation and demodulation method and the said modulation system correspondence of initial transmission.
4. method according to claim 2 is characterized in that, also comprises: transmission block size table is used to preserve transmitting block index number and physical resource number of blocks, with the corresponding relation of transmission block size;
According to the physical resource number of blocks of said transmitting block index number and this re-transmission, search this and retransmit indicated transmission block size, comprising:
In transmission block size table, search the transmitting block index number transmission block size corresponding with the physical resource number of blocks of this re-transmission, retransmit indicated transmission block size as this.
5. method according to claim 3; It is characterized in that; The modulation and demodulation method that is used to retransmit said when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, this carries the agreement regulation when retransmitting comprises:
When this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, the modulation system that is adopted in the modulation and demodulation method of inquiry initial transmission;
In modulation and transmitting block index concordance list, search the modulation and demodulation method that is used to retransmit of said modulation system corresponding protocols regulation, the modulation and demodulation method of carrying when retransmitting as this.
6. the pretreatment unit of data re-transmission in the LTE system is characterized in that, comprising:
The quantity determination module is used for the physical resource number of blocks according to initial transmission, confirms the physical resource number of blocks of this re-transmission;
Enquiry module is used for the modulation and demodulation method of carrying according to initial transmission, and the physical resource number of blocks of this re-transmission, inquires about this and retransmits indicated transmission block size;
First retransmission module is used for when the indicated transmission block that transmission block is big or small and initial transmission the is indicated size of this re-transmission is consistent, and this modulation and demodulation method and initial transmission of carrying when retransmitting is consistent;
Second retransmission module is used for when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, and this carries the modulation and demodulation method that is used to retransmit of agreement regulation when retransmitting.
7. device according to claim 6 is characterized in that enquiry module comprises:
First searches submodule, is used for the modulation and demodulation method according to initial transmission, searches corresponding transmitting block index number;
Second searches submodule, is used for the physical resource number of blocks according to transmitting block index number and this re-transmission, searches this and retransmits indicated transmission block size.
8. device according to claim 7 is characterized in that, also comprises: modulation and transmitting block index concordance list are used to preserve the corresponding relation of modulation and demodulation method, modulation system and transmitting block index number;
Said first searches submodule comprises:
Query unit is used for inquiring about the modulation system that the modulation and demodulation method of initial transmission is adopted;
Search the unit, be used for, search the transmitting block index number of modulation and demodulation method and the said modulation system correspondence of initial transmission at modulation and transmitting block index concordance list.
9. device according to claim 7 is characterized in that, also comprises: transmission block size table is used for transmitting block index number and physical resource number of blocks, with the corresponding relation of transmission block size;
Said second searches submodule, is used at transmission block size table, searches the transmitting block index number transmission block size corresponding with the physical resource number of blocks of this re-transmission, retransmits indicated transmission block size as this.
10. device according to claim 8 is characterized in that, said second retransmission module comprises:
The inquiry submodule is used for when this retransmits not of uniform size the causing of transmission block that indicated transmission block is big or small and initial transmission is indicated, the modulation system that is adopted in the modulation and demodulation method of inquiry initial transmission;
Search submodule, be used for, search the modulation and demodulation method that is used to retransmit of said modulation system corresponding protocols regulation, the modulation and demodulation method of carrying when retransmitting as this at modulation and transmitting block index concordance list.
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