CN101567749A - Method and device for downlink data transmission - Google Patents
Method and device for downlink data transmission Download PDFInfo
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Abstract
The invention discloses a method for downlink data transmission, comprising the steps: a terminal reports a terminal level supported by itself and an extended memory instruction used for expressing the terminal memory size to a base station; the base station obtains the maximum progresses N supported by downlink according to the scale of the uplink and the downlink; and the base station carries out memory allocation preprocessing according to the terminal level, the extended memory instruction and the supported maximum progresses N and performs the downlink transmission. The invention also discloses a user terminal and the base station. The invention has the advantages that the base station can pointedly adopt memory allocation method to allocate the memory of user equipment (UE), thereby avoiding the condition that effective speed matching approaches or exceeds 1 and further enhancing the reliability of the system transmission.
Description
Technical field
The present invention relates to mobile communication technology, downlink data transmission method and device in particularly a kind of mobile communication.
Background technology
In the automatic request retransmission of mixing (HARQ) mechanism of Long Term Evolution (LTE) system, the base station is when being handed down to user terminal (UE) with arbitrary HARQ process data, the base station issues process data several times, issue the part in this process data at every turn, UE decodes to receiving data, if decode successfully after receiving for the first time a part of process data that the base station issues, then to base station feedback ACK information, the base station no longer issues other data of this process; If decoding failure, then the result that will decode stores, and to the base station feedback nack message, continue to issue the next part process data of this process behind the base station reception nack message to UE, UE merges the back with the decoded result of preserving last time and decodes after receiving the next part process data, and handle according to aforementioned manner according to the success of whether decoding, and so forth, up to the decoding success or receive all data of this process.
In above-mentioned LTE system, the base station uses the rate-matched rate algorithms of female sign indicating number code check 1/3 that the information data of HARQ process is carried out rate-matched, that is to say, information data for the N bit, after carrying out rate-matched, the data transmission block that forms is the 3N bit, when the decoding failure, needs data quantity stored 3N bit just.As seen, under 1/3 rate-matched speed, the memory size that the UE end is provided with is relatively large.
At this problem, the FDD system proposes to have used limited buffer rate-matched (LBRM, limitedbuffer rate matching) algorithm, be that information data is carried out after 1/3 rate-matched, again information data and checking data are punched, make that remaining information data and checking data total length are in the past half, the effective speed rate matched that obtains is 2/3, and the right systematic function of effective speed rate matched coding of employing 2/3 also can ensure.
Wherein Da Kong principle is the final position of the data block that information data and checking data are formed after the prerequisite rate-matched.For example, Fig. 1 is a global buffer rate-matched schematic diagram, wherein, dash area is represented information data, white portion represents to carry out the checking data that adds after 1/3 rate-matched, RV0 among the figure represents to transmit for the first time the initial point position of data, RV1 represent to receive second pass behind the nack message be input into number of passes according to the time initial point position ....The LBRM algorithm punching schematic diagram of Fig. 2 for carrying out based on Fig. 1 wherein, with the back part data punching deletion of checking data, when transmitting, promptly no longer transmits this part data, and the RV0 among the figure etc. are identical with implication among Fig. 1.Here need to prove that the punching of carrying out among Fig. 2 is not to carry out according to 2/3 rate-matched speed, and be the schematic diagram of a punching.
After utilizing the LBRM algorithm to the process data punching, the effective speed rate matched is 2/3, thereby makes the storage data volume of decoding failure each HARQ process of back in UE just dwindle half.For 8 processes of FDD system, the total memory size of UE also can reduce half when design, saved cost greatly.
In the LTE system, the UE Terminal Design is supported the double mode of TDD and FDD.When the UE Terminal Design, tdd mode uses the identical internal memory of size to store the data of a plurality of processes with fdd mode at present.When system moved, if tdd mode is supported identical peak rate transmission with fdd mode, the data block size of each process transmission should be identical so.But, because under the tdd mode, the process number that different uplink and downlink timeslot ratio is corresponding different, under some uplink and downlink timeslot ratio, its process number is higher than 8 (for example 9,10,12 and 15), therefore, if make tdd mode and fdd mode support identical peak rate transmission, according to the LTE terminal of fdd mode design, then can't support to be higher than under the tdd mode situation of 8 processes.
In the face of this situation, if compress the shared internal memory of each process by more punching, when tdd mode uses LBRM compression algorithm information data and checking data so, corresponding effective speed rate matched correspondence 9,10,12 and 15 processes are respectively 3/4,5/6, and 1 and 5/4, wherein, the three kinds of rate values in back obviously near or greater than ' 1 ', will cause the serious decline of system reliability, can't satisfy the systematic function requirement.
Summary of the invention
In view of this, the invention provides a kind of downlink data transmission method and relevant base station and user terminal, can improve reliability of data transmission under the tdd mode.
For achieving the above object, the present invention adopts following technical scheme:
A kind of downlink data transmission method comprises:
Terminal grade of self supporting that the base station receiving terminal reports and the exented memory indication that is used to represent the terminal memory size;
The base station obtains the descending maximum process of supporting according to the up-downgoing ratio and counts N;
N is counted according to indication of described terminal grade, described exented memory and the maximum process supported in the base station, carries out the Memory Allocation pre-operation, and carries out downlink transfer.
Preferably, the exented memory that described base station receiving terminal reports is designated as: described terminal utilizes 1 bit information to carry out described reporting, two states of described 1 bit information, and representative is not supported exented memory and is supported exented memory respectively.
Preferably, the described represented memory size of exented memory of not supporting is the base memory size of systemic presupposition;
The represented memory size of described support exented memory is with corresponding greater than a process number in four descending process numbers of N0, and described N0 is the corresponding process number of described base memory size.
Preferably, the exented memory that described base station receiving terminal reports is designated as: described terminal utilizes 2 bit informations to carry out described reporting, the one of four states of described 2 bit informations, exented memory is not supported in representative respectively, support exented memory size A, support exented memory size B, support exented memory size C.
Preferably, the described represented memory size of exented memory of not supporting is the base memory size of systemic presupposition;
Described support exented memory size A, support exented memory size B and support the represented memory size of exented memory size C respectively with greater than three in four descending process numbers of N0 corresponding, described N0 is the corresponding process number of described base memory size.
Preferably, the exented memory that described base station receiving terminal reports is designated as: described terminal utilizes 3 bit informations to carry out described reporting, five states of described 3 bit informations, exented memory is not supported in representative respectively, support exented memory size A, support exented memory size B, support exented memory size C, support exented memory size D.
Preferably, the described represented memory size of exented memory of not supporting is the base memory size of systemic presupposition;
Described support exented memory A, support exented memory B and support the represented memory size of exented memory C corresponding one by one with four descending process numbers respectively that described N0 is the process number of described base memory size correspondence greater than N0.
Preferably, this method further comprises:
In advance the base memory size be multiply by arbitrary exented memory and indicate pairing process number, result of calculation is indicated represented memory size as described arbitrary exented memory again divided by N0.
Preferably, N is counted according to the described terminal grade of terminal feedback, the indication of described exented memory and the maximum process supported in described base station, carries out the Memory Allocation pre-operation, and carries out downlink transfer and comprise:
Pairing memory size is indicated according to pairing memory size of terminal grade and exented memory in the base station, and the maximum process that computing terminal is supported is counted M;
The base station judges exented memory indicates pairing memory size whether to satisfy the requirement that maximum process is counted M, if carry out the transmission of Memory Allocation pre-operation 1 and corresponding downstream; Otherwise, carry out the transmission of Memory Allocation pre-operation 2 and corresponding downstream.
Preferably, this method further comprises: terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, the processing operation of the line data of going forward side by side.
Preferably, Memory Allocation pre-operation 1 is carried out in described base station and corresponding downstream is transmitted as: carry out internal memory among the five equilibrium UE according to N or M, and carry out the corresponding downstream transmission according to the internal memory after distributing.
Preferably, describedly carry out Memory Allocation pre-operation 2 and corresponding downstream is transmitted as in base station side: branch internal memories such as N are counted in the base station according to process, reduce modulation coding mode and carry out downlink transfer;
Perhaps, branch internal memories such as N are counted in the base station according to process, increase the effective speed rate matched of LBRM in effective range, and the length that reduces at every turn to transmit information is carried out downlink transfer.
Preferably, Memory Allocation pre-operation 2 is carried out for reaching the corresponding downstream transmission in described base station: branch internal memories such as M are counted in the base station according to process, count scheduling and the transmission that N carries out downlink data according to process;
Described terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, the processing operation of line data of going forward side by side comprises: terminal is counted branch internal memories such as M according to process, count outside the M and process data error of transmission for exceeding described process, directly abandon, and to the base station feedback nack message.
Preferably, Memory Allocation pre-operation 2 is carried out in described base station and corresponding downstream is transmitted as: branch internal memories such as N are counted in the base station according to process, and carry out the corresponding downstream transmission according to the internal memory after distributing;
Described terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, and the storage operation of the line correlation data of going forward side by side comprises: terminal is counted branch internal memories such as N according to process, carry out part for the data that exceed memory size to abandon; Arbitrary process is when repeatedly data retransmission merges, to newly to all data and the data of storage carry out part and merge.
Preferably, Memory Allocation pre-operation 2 is carried out in described base station and corresponding downstream is transmitted as: the descending number of processes of base station configuration, and according to branch internal memories such as this process numbers, and number of processes informed to terminal, and carry out the corresponding downstream transmission according to the internal memory after distributing;
Described terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, the storage operation of the line correlation data of going forward side by side is: terminal receives the number of processes that the base station issues, carry out the actual memory batch operation according to this number of processes, the processing operation of the line data of going forward side by side.
A kind of user terminal comprises: terminal grade reports the unit, and the exented memory indication reports unit, Memory Allocation and processing unit;
Described terminal grade reports the unit, is used for the terminal grade of self is reported the base station;
Described exented memory indication reports the unit, is used for the exented memory indication information of expression self EMS memory size is reported the base station;
Described Memory Allocation and processing unit, the Memory Allocation mode that is used for issuing according to the base station is each course allocation internal memory and processing reception data.
A kind of base station comprises: the terminal grade receiving element, and exented memory indication receiving element, maximum process are counted determining unit, internal memory preassignment unit and data dispatch transmission unit,
Described terminal grade receiving element is used for the terminal grade that receiving terminal reports, and sends to described internal memory preassignment and data dispatch transmission unit;
Described exented memory indication receiving element is used for the exented memory indication information that receiving terminal reports, and sends to described internal memory preassignment and data dispatch transmission unit;
Described maximum process is counted determining unit, is used for definite pairing maximum process of current ascending-descending subframes ratio and counts N;
Described internal memory preassignment unit is used for the described terminal grade according to terminal feedback, the indication of described exented memory and the maximum process supported is counted N, carries out the Memory Allocation pre-operation;
Described data dispatch transmission unit is used for carrying out data dispatch and transmission according to the memory size of each process of determining.
By the technical scheme of the invention described above as seen, among the present invention, terminal grade of self supporting that base station reception UE reports and the exented memory indication that is used for the terminal memory size, concrete Memory Allocation pre-operation and data dispatch transmission are carried out according to this terminal memory size in the base station.Like this, the terminal memory size has multiple, and report the terminal memory size of self supporting by UE, it is internal memory among the course allocation UE that the base station can be taked the Memory Allocation mode targetedly, thereby avoid the effective speed rate matched near or surpass 1 situation, and then improve the reliability of system transmissions.
Description of drawings
Fig. 1 is a global buffer rate-matched schematic diagram.
The LBRM algorithm punching schematic diagram of Fig. 2 for carrying out based on Fig. 1.
Fig. 3 is a downlink data transmitting method overview flow chart provided by the invention.
Fig. 4 is the overall construction drawing of UE provided by the invention.
Fig. 5 is the overall construction drawing of base station provided by the invention.
Fig. 6 is a downlink data transmitting method particular flow sheet in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technological means and advantage clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
At present, according to transmission block size and effective speed rate matched, standard definition the UE terminal buffers device size when supporting N0 process, specific descriptions are as following table 1.Wherein the UE type is represented the terminal grade that UE supports, for different terminal grades, the base memory of N0 process correspondence varies in size.
The down physical layer parameter value of table 1 UE type
| The UE type | Maximum transport block size (bit) | The effective speed rate matched | Base memory size (bit) |
| Class1 | [10040] | 1/3 | [242,880] |
| Type 2 | [50000] | 1/3 | [1,206,624] |
| Type 3 | [100000] | 2/3 | [1,206,624] |
| Type 4 | [150112] | 2/3 | [1,811,232] |
| Type 5 | [300064] | 2/3 | [3,620,256] |
Basic thought of the present invention is: the optional multiple terminal memory size of UE is set, and UE reports the terminal memory size of self supporting to the base station, and concrete Memory Allocation and data dispatch transmission means are determined according to the information that receives in the base station.
Fig. 3 is the overview flow chart of HARQ process data transmission method provided by the invention.As shown in Figure 3, this flow process comprises:
Step 301 sets in advance the optional memory size of UE, for UE determines in the described memory size any one.
In this step, multiple terminal memory size is set, comprises maximum base memory size and the maximum exented memory size of supporting greater than N0 process of supporting N0 process.Wherein, the base memory size is promptly as shown in table 1; The exented memory size is the optional memory size of terminal that the present invention increases newly, by the buffer size of terminal extension, thereby makes it can support situation greater than N0 process.Concrete exented memory size can also have multiple choices, supports different process numbers respectively.As required, can with the exented memory size definition total memory size of UE correspondence, also it can be defined as the memory size that on the base memory basis, increases.
By above-mentioned setting, when carrying out the LTE Terminal Design, can select UE is designed to support any one memory size that just the buffer with UE is defined as any one memory size.
When carrying out downlink data transmission under the step 302, tdd mode, the exented memory indication that UE reports the terminal grade of self supporting and represents the self EMS memory size to the base station.
According to the represented memory size of predefined exented memory indication, the memory size of this UE is reported the base station, specifically can be by the mode informing base station of high-level signaling.
The base station is determined the terminal memory size that UE supports on the one hand, determines maximum process number according to current ascending-descending subframes ratio on the other hand.
So far, the method flow of transmitting HARQ process data of the present invention finishes.
Fig. 4 and Fig. 5 are respectively the overall construction drawing of UE provided by the invention and base station, and this UE and base station can be used to implement above-mentioned HARQ process data transmission method.
As shown in Figure 4, this UE comprises: the terminal grade receiving element, the exented memory indication reports unit, Memory Allocation and processing unit.Wherein, terminal grade reports the unit, is used for the terminal grade of self is reported the base station; The exented memory indication reports the unit, and the terminal memory size that is used for self supporting reports the base station; Memory Allocation and processing unit, the Memory Allocation mode that is used for issuing according to the base station are the course allocation internal memory and handle the reception data.
As shown in Figure 5, this base station comprises: the terminal grade receiving element, exented memory indication receiving element, maximum process are counted determining unit, internal memory preassignment unit and data dispatch transmission unit.Wherein, described terminal grade receiving element is used for the terminal grade that receiving terminal reports, and sends to described internal memory preassignment and data dispatch transmission unit.Exented memory indication receiving element is used for the exented memory indication information that receiving terminal reports, and sends to described internal memory preassignment and data dispatch transmission unit.Maximum process is counted determining unit, is used for determining the pairing maximum process number of current ascending-descending subframes ratio.The maximum process that internal memory preassignment unit is used for the described terminal grade that feeds back according to terminal, described exented memory is indicated and supported is counted N, carries out the Memory Allocation pre-operation.The data dispatch transmission unit is used for carrying out data dispatch and transmission according to the memory size of each process of determining.
Above-mentioned being overview of the present invention below is elaborated to the specific embodiment of the present invention by reference Fig. 6.
Step 601 according to LBRM algorithm computation UE terminal memory size, is provided with the terminal type of memory, for UE determines in the described memory size any one.
The exented memory indication of the multiple terminal memory size of expression is set, the corresponding different process number of various exented memory indication among the present invention.Wherein, the pairing exented memory indication of existing base memory size is set to not support exented memory, and its corresponding process number is N0; And introduce correspondence and indicate greater than the exented memory of other different process numbers of N0 process.Specifically the process number greater than the N0 process can be 9,10,12 or 15, and the promptly corresponding process number of tdd mode at present certainly, also can be selected other process numbers greater than N0.
In this step, need calculate the represented memory size of various exented memory indications at process number greater than N0, specifically can calculate according to the LBRM algorithm, wherein maximum transport block size keeps identical with shown in the table 1, so that under TDD mould and the fdd mode, system can reach identical peak-peak speed; The effective speed rate matched is 2/3, when guaranteeing that promptly internal memory suitably reduces, destroys certain data and does not influence systematic function.
Concrete, in greater than the process number of N0, select four kinds of process numbers among the present invention, the memory size of these four kinds of processes being counted correspondence is as the exented memory indication represented memory size corresponding with this process number, and specifically this process is counted the account form of the memory size of correspondence and is: the base memory size multiply by corresponding process number again divided by N0.With N0=8, newly-increased support is an example greater than 9,10,12 and 15 processes of 8 processes, the all possible exented memory indication of counting correspondence greater than the process of N0 comprises: corresponding process number is 9 exented memory size a, the represented memory size of this exented memory size a is that the base memory size multiply by 9/8; Corresponding process number is 10 exented memory size b, and the represented memory size of this exented memory indication is that the base memory size multiply by 5/4; Corresponding process number is 12 exented memory size c, and the represented memory size of this exented memory indication is that the base memory size multiply by 4/3; Corresponding process number is 15 exented memory size d, and the represented memory size of this exented memory indication is that the base memory size multiply by 15/8.Concrete exented memory indication parameter is shown in table 2 and table 3.Wherein, the representative of the exented memory of table 2 size is the difference of actual memory size and base memory size; What the exented memory size of table 3 was represented is the actual memory size.
The down physical layer parameter value of table 2 UE type
The down physical layer parameter value of table 3 UE type
The above-mentioned parameter setting that might be set to four kinds of exented memory sizes that exented memory indicates for institute.In fact, when carrying out the invention process, except that the exented memory indication of expression base memory size, other exented memory indications not necessarily comprise all above-mentioned four kinds, and only setting wherein one or more as required, then follow-up UE and base station only can be operated at the exented memory indication that is provided with.
When under tdd mode, carrying out transfer of data, carry out following operation:
The mode that reports for terminal grade can adopt existing mode to realize, just repeats no more here.
For reporting of exented memory indication, consider different reporting information expenses, the present invention provides 3 kinds of information and reports scheme, is respectively to utilize 1 bit information to report, utilize 2 bit informations to report and utilize 3 bit informations to report.
When the information that adopts different length reported the exented memory indication, the memory size that is provided with in step 601 of its correspondence was also inequality.
Below specifically introduce three kinds and report mode:
(1) utilize 1 bit information to report
When adopting 1 bit information to report the exented memory indication, two kinds of exented memory indications that two kinds of optional memory sizes are set in the step 601 and represent these two kinds of memory sizes.These two kinds of exented memory indications are respectively not to be supported exented memory and supports exented memory, wherein, does not support that the represented memory size of exented memory size is the base memory size, supports exented memory correspondingly as required to count N greater than any process of N0
X, and according to the represented memory size of this process number calculating.
At the system design initial stage, promptly can determine the optional memory size of two kinds of UE, UE reports exented memory when indication, utilizes two kinds of values of 1 bit information to represent respectively and does not support exented memory and support exented memory.For example, the system design initial stage, determine UE for arbitrary type, can not support exented memory, perhaps support exented memory, the base station determines according to the value of exented memory indication whether UE supports exented memory after receiving the exented memory indication that UE reports.
The value of concrete 1 bit expanded internal memory indication is distributed: report 1bit information ' 1 ', expression UE does not support exented memory, and the memory size of its expression is the base memory size; Otherwise, reporting 1bit information ' 0 ', expression UE supports exented memory, the memory size of its expression is for supporting N
XThe memory size of individual process.
In the FDD system, use the signaling indication dedicated pilot signal (DRS) of 1bit, and this 1bit does not use in the TDD system, therefore can design UE utilizes this 1bit resource as the memory information reporting base station, thereby the control signaling to system does not increase extra expense, the high-level signaling of 1 bit can certainly additionally be set as memory information.
Originally report in the mode, the little or not influence to the signaling consumption influence, but alternative terminal type of memory is less.
(2) utilize 2 bit informations to report
When adopting 2 bit informations to report the exented memory indication, four kinds of exented memory indications that four kinds of optional memory sizes of UE are set in the step 601 and represent these four kinds of memory sizes.These four kinds of exented memory indications are respectively: do not support exented memory, support exented memory size A, support exented memory size B, support exented memory size C.Wherein, do not support that the represented memory size of exented memory is the base memory size, corresponding process is counted N0; Support exented memory size A, support exented memory size B and support that the represented memory size of exented memory size C is corresponding to respectively three kinds of N1, N2, N3 in four kinds of process numbers of N0.
With identical in aforementioned (one), at the system design initial stage, promptly can determine four kinds of optional memory sizes of UE, UE reports exented memory when indication, utilizes four kinds of values of 2 bit informations to represent respectively and does not support exented memory, supports exented memory size A, supports exented memory size B and support exented memory size C.
Still with N0=8, be respectively 9,10,12 and 15 greater than four kinds of process numbers of N0 and be example, four kinds of exented memory indications can be as shown in table 4 with the corresponding relation of four kinds of values of 2 bit informations.
The terminal type of memory scheme that table 42 bit memory information corresponding UE are supported
| 2 bit informations | A | B | C |
| 00 | Support exented memory size A (N1=15) | Support exented memory size A (N1=15) | Support exented memory size A (N1=12) |
| 01 | Support exented memory size B (N2=12) | Support exented memory size B (N2=12) | Support exented memory size B (N2=10) |
| 10 | Support exented memory size C (N3=9) | Support exented memory size C (N3=10) | Support exented memory size C (N3=9) |
| 11 | Do not support exented memory | Do not support exented memory | Do not support exented memory |
Table 4 shows the set-up mode of A, B, three kinds of different exented memory indications of C, wherein, selected three processes greater than N0 are counted difference, therefore, for above-mentioned three kinds of selections, support exented memory size A, support exented memory size B, support that the process number of the actual correspondence of exented memory size C institute is also inequality.In addition, originally report in the mode, can utilize the high-level signaling of setting up to carry the exented memory indication and report the base station.Report mode than first kind, signaling consumption increases, but the memory size that UE can select to support has increased.
(3) utilize 3 bit informations to report
When adopting 3 bit informations to report the exented memory indication, four kinds of exented memory indications that five kinds of optional memory sizes of UE are set in the step 601 and represent these four kinds of memory sizes.These five kinds of exented memory indications are respectively: do not support exented memory, support exented memory size A, support exented memory size B, support exented memory size C, support exented memory size D.Wherein, do not support that the represented memory size of exented memory is the base memory size, corresponding process is counted N0; Support exented memory size A, support exented memory size B, support exented memory size C and support the represented memory size of exented memory size D respectively with to count N1, N2, N3, N4 greater than four kinds of processes of N0 corresponding one by one.
Still with N0=8, be respectively 9,10,12 and 15 greater than four kinds of process numbers of N0 and be example, when the corresponding relation of five kinds of values that five kinds of exented memory indications and 3 bit informations are set, can followingly be provided with: when reporting the exented memory indication, first bit information in the 3 bit memory informations represents whether UE terminal internal memory supports the required memory size of all time slot ratio transmission of base station, and can expression just support 15 processes.When first bit represented not support that all time slot ratios of base station transmit required memory size, back 2 bit informations represented that the exented memory of not supporting exented memory, corresponding 9 processes is indicated, the exented memory of corresponding 10 processes is indicated or the exented memory indication of corresponding 12 processes.For example, if support the required memory size of all time slot ratio transmission of base station, first bit reports 1bit information ' 1 ', and all 3bits information can be expressed as ' 100 '; Otherwise if do not support, first bit reports 1bit information ' 0 '; When first bit information is ' 0 ', utilize back 2 bit informations ' 01 ', ' 10 ', exented memory is indicated or do not supported to the exented memory indication of 12 processes of ' 11 ' and ' 00 ' expression correspondence respectively, the exented memory indication of corresponding 10 processes, the exented memory of corresponding 9 processes, and the value of concrete 3bits memory information can be as table 5 with the corresponding of exented memory indication.
The corresponding implication of table 53 bit memory informations
| Memory information | The expression implication |
| 100 | The UE internal memory is supported the required memory size of base station time slot proportional arrangement |
| 001 | The UE internal memory is not supported the memory size that the base station time slot proportional arrangement is required, the exented memory indication of corresponding 12 processes |
| 010 | The UE internal memory is not supported the memory size that the base station time slot proportional arrangement is required, the exented memory indication of corresponding 10 processes |
| 011 | The UE internal memory is not supported the memory size that the base station time slot proportional arrangement is required, the exented memory indication of corresponding 9 processes |
| 000 | The UE internal memory is not supported the memory size that the base station time slot proportional arrangement is required, does not support exented memory |
Originally report in the mode, can utilize the high-level signaling of setting up to carry memory information and report the base station.Report mode than preceding two kinds, the signaling consumption maximum, but the memory size that UE can select is maximum.
In this step, the exented memory indication of making an appointment according to UE and base station reports mode, and the memory information that UE reports is resolved in the base station, and the memory size supported of definite UE.Concrete definite mode is corresponding with the mode of reporting terminal type of memory in the step 602, just repeats no more here.
Further, the base station is according to uplink and downlink timeslot ratio, and the maximum process that obtains current downlink transfer support is counted N.
Concrete uplink and downlink timeslot ratio is identical with existing regulation with the relation of process number, and is specifically as shown in table 6.
The corresponding relation of table 6 uplink and downlink timeslot ratio and maximum process number
As previously mentioned, the corresponding different process numbers of supporting of different terminal memory sizes, therefore indicate pairing memory size according to pairing memory size of terminal grade and exented memory, the maximum process of can computing terminal supporting is counted M, also the i.e. corresponding process number of this exented memory indication.If the pairing process of memory size of UE is counted M smaller or equal to described maximum process number, then determine to satisfy the requirement of maximum process number, otherwise, determine not satisfy the requirement of maximum process number.
Step 605 is carried out predefined Memory Allocation pre-operation 1, and carries out corresponding data dispatch and transmission, and execution in step 607 again.
For simplicity, here the operation of UE in the base station operation of this step and the corresponding step 107 is introduced in the lump.Wherein, suppose predefined Memory Allocation pre-operation 1 can for: carry out internal memory among the five equilibrium UE according to N, carry out data dispatch and transmission then, UE also carries out data processing and storage according to branch internal memories such as N accordingly; Perhaps, predefined Memory Allocation pre-operation 1 also can for: carry out internal memory among the five equilibrium UE according to M, carry out data dispatch and transmission then, UE also carries out data processing and storage according to branch internal memories such as M accordingly.
Step 606 is carried out predefined Memory Allocation pre-operation 2 and is carried out corresponding data dispatch and transmission; Execution in step 107 again.
For simplicity, here the operation of UE in the base station operation of this step and the corresponding step 107 is introduced in the lump, concrete predefined mode can be considered following several scheme:
A, the internal memory of dynamic assignment each process in base station in UE, i.e. the process number that can support according to UE terminal internal memory, unequal each proceeding internal memory size of distributing is carried out data dispatch and transmission according to the dynamic assignment result; Concrete, can be according to the difference of COS, for the internal memory that the course allocation of different COS does not wait, for example, be that speech data distributes less internal memory, be the bigger internal memory of video data distribution.UE carries out Memory Allocation according to the Dram method of salary distribution that the base station issues, and carry out Data Receiving and processing according to Memory Allocation, perhaps in time empty the in-process data message of transmission success, for example, after certain process data transmission success, empty the shared internal memory of this process, distribute to other process.
The transmision peak speed of b, restricted part or whole processes, branch internal memories such as N are counted in the base station according to process, reduce modulation coding mode, carry out data dispatch and transmission; For example, with the transmision peak rate limit near a preset threshold value, not with high modulation coded system transmission, like this can the shared memory size of each process of corresponding reduction, thereby make the more process number of limited memory source support.The branch internal memories such as process number that UE issues according to the base station, and carry out corresponding Data Receiving and processing.
C, count branch internal memory such as N according to process, in effective LBRM rate-matched speed range, improve LBRM rate-matched speed, carry out data dispatch and transmission; For example, in the scope of LBRM rate-matched speed≤3/4, improve LBRM rate-matched speed as far as possible, promptly the data block of each process transmission is destroyed more bits, to reduce the size of data of each process, make to have enough spaces in the UE terminal and can store the more data message of multi-process number.The branch internal memories such as process number that UE issues according to the base station, and decode according to the LBRM rate-matched speed that the base station issues.
D, according to the internal memory among the branch UE such as M, and count N according to maximum process and carry out data dispatch and transmission; UE, directly abandons for exceeding outside the described process number that issues and process data error of transmission according to the branch internal memories such as process number that the base station issues, and to the base station feedback nack message; For example, it is 8 that the process of the terminal type of memory correspondence that UE supports is counted M, and count N according to the maximum process that uplink and downlink timeslot ratio is determined is 10, then the base station is according to the internal memory among 8 branch UE such as process, and dispatch according to maximum process several 10, in UE, for back 2 processes outside surpassing 8, if the decoding failure is then directly abandoned the data of this process and is fed back nack message.Under this kind mode, can be good at guaranteeing the reliability of data transmission requirement, but may cause data transmission performance poor for N-M the process in back for a preceding M process.
The internal memory among the branch UE such as N is counted in e, base station according to maximum process, UE directly abandons for the data that exceed memory size according to the memory size storage data of each process, when repeatedly data retransmission merges with arbitrary process, carries out part according to memory size and merges.For example, it is 9 that the process of the terminal type of memory correspondence that UE supports is counted M, and count N according to the maximum process that uplink and downlink timeslot ratio is determined is 10, then the base station is according to several 10 internal memories such as branch such as grade of maximum process, and dispatch and transfer of data according to maximum process several 10, terminal is stored according to the memory size of each process, abandons in each process back part data, carries out part according to memory size and merge when the merging of data retransmission repeatedly.This kind mode is compared with mode d, and the data transmission credibility of all N process is average.
F, the descending number of processes of base station base station configuration, according to branch internal memories such as this process numbers, number of processes is informed to terminal, and carry out data dispatch and transmission according to the descending number of processes of this configuration, the branch internal memories such as process number that UE issues according to the base station, the line data of going forward side by side receive and handle.
Concrete reception and processing mode all to introduce, just repeat no more in abovementioned steps 605 and 606 here.
So far, method flow of the present invention finishes.Above-mentioned concrete method flow can be implemented in Fig. 4 and user terminal shown in Figure 5 and base station.
Use the present invention, the terminal memory size of plurality of optional is provided for UE and base station, the terminal memory size that UE uses information bit indication UE seldom to support, the memory size that UE supports is determined in the exented memory indication that the base station can in time report according to UE, change corresponding UE Memory Distribution Map and transmission means, thereby avoid the effective speed rate matched near or surpass 1 situation, and then improve the reliability of system transmissions.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1, a kind of downlink data transmission method is characterized in that, this method comprises:
Terminal grade of self supporting that the base station receiving terminal reports and the exented memory indication that is used to represent the terminal memory size;
The base station obtains the descending maximum process of supporting according to the up-downgoing ratio and counts N;
N is counted according to indication of described terminal grade, described exented memory and the maximum process supported in the base station, carries out the Memory Allocation pre-operation, and carries out downlink transfer.
2, method according to claim 1, it is characterized in that, the exented memory that described base station receiving terminal reports is designated as: described terminal utilizes 1 bit information to carry out described reporting, two states of described 1 bit information, and representative is not supported exented memory and is supported exented memory respectively.
3, method according to claim 2 is characterized in that, the described represented memory size of exented memory of not supporting is the base memory size of systemic presupposition;
The represented memory size of described support exented memory is with corresponding greater than a process number in four descending process numbers of N0, and described N0 is the corresponding process number of described base memory size.
4, method according to claim 1, it is characterized in that, the exented memory that described base station receiving terminal reports is designated as: described terminal utilizes 2 bit informations to carry out described reporting, the one of four states of described 2 bit informations, exented memory is not supported in representative respectively, support exented memory size A, support exented memory size B, support exented memory size C.
According to the method shown in the claim 4, it is characterized in that 5, the described represented memory size of exented memory of not supporting is the base memory size of systemic presupposition;
Described support exented memory size A, support exented memory size B and support the represented memory size of exented memory size C respectively with greater than three in four descending process numbers of N0 corresponding, described N0 is the corresponding process number of described base memory size.
6, method according to claim 1 is characterized in that,
The exented memory that described base station receiving terminal reports is designated as: described terminal utilizes 3 bit informations to carry out described reporting, five states of described 3 bit informations, exented memory is not supported in representative respectively, support exented memory size A, support exented memory size B, support exented memory size C, support exented memory size D.
7, method according to claim 6 is characterized in that, the described represented memory size of exented memory of not supporting is the base memory size of systemic presupposition;
Described support exented memory A, support exented memory B and support the represented memory size of exented memory C corresponding one by one with four descending process numbers respectively that described N0 is the process number of described base memory size correspondence greater than N0.
8, according to claim 3,5 or 7 described methods, it is characterized in that this method further comprises:
In advance the base memory size be multiply by arbitrary exented memory and indicate pairing process number, result of calculation is indicated represented memory size as described arbitrary exented memory again divided by N0.
9, method according to claim 1 is characterized in that, N is counted according to the described terminal grade of terminal feedback, the indication of described exented memory and the maximum process supported in described base station, carries out the Memory Allocation pre-operation, and carries out downlink transfer and comprise:
Pairing memory size is indicated according to pairing memory size of terminal grade and exented memory in the base station, and the maximum process that computing terminal is supported is counted M;
The base station judges exented memory indicates pairing memory size whether to satisfy the requirement that maximum process is counted M, if carry out the transmission of Memory Allocation pre-operation 1 and corresponding downstream; Otherwise, carry out the transmission of Memory Allocation pre-operation 2 and corresponding downstream.
10, method according to claim 9 is characterized in that, this method further comprises: terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, the processing operation of the line data of going forward side by side.
11, method according to claim 9 is characterized in that, Memory Allocation pre-operation 1 is carried out in described base station and corresponding downstream is transmitted as: carry out internal memory among the five equilibrium UE according to N or M, and carry out the corresponding downstream transmission according to the internal memory after distributing.
12, method according to claim 9 is characterized in that, describedly carries out Memory Allocation pre-operation 2 and corresponding downstream is transmitted as in base station side: branch internal memories such as N are counted in the base station according to process, reduce modulation coding mode and carry out downlink transfer;
Perhaps, branch internal memories such as N are counted in the base station according to process, increase the effective speed rate matched of LBRM in effective range, and the length that reduces at every turn to transmit information is carried out downlink transfer.
13, method according to claim 10 is characterized in that,
Memory Allocation pre-operation 2 is carried out for reaching the corresponding downstream transmission in described base station: branch internal memories such as M are counted in the base station according to process, count scheduling and the transmission that N carries out downlink data according to process;
Described terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, the processing operation of line data of going forward side by side comprises: terminal is counted branch internal memories such as M according to process, count outside the M and process data error of transmission for exceeding described process, directly abandon, and to the base station feedback nack message.
14, method according to claim 10 is characterized in that,
Memory Allocation pre-operation 2 is carried out in described base station and corresponding downstream is transmitted as: branch internal memories such as N are counted in the base station according to process, and carry out the corresponding downstream transmission according to the internal memory after distributing;
Described terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, and the storage operation of the line correlation data of going forward side by side comprises: terminal is counted branch internal memories such as N according to process, carry out part for the data that exceed memory size to abandon; Arbitrary process is when repeatedly data retransmission merges, to newly to all data and the data of storage carry out part and merge.
15, method according to claim 10 is characterized in that,
Memory Allocation pre-operation 2 is carried out in described base station and corresponding downstream is transmitted as: the descending number of processes of base station configuration, and according to branch internal memories such as this process numbers, and number of processes informed to terminal, and carry out the corresponding downstream transmission according to the internal memory after distributing;
Described terminal is carried out the actual memory batch operation according to the Memory Allocation pre-operation of base station, the storage operation of the line correlation data of going forward side by side is: terminal receives the number of processes that the base station issues, carry out the actual memory batch operation according to this number of processes, the processing operation of the line data of going forward side by side.
16, a kind of user terminal is characterized in that, this user terminal comprises: terminal grade reports the unit, and the exented memory indication reports unit, Memory Allocation and processing unit;
Described terminal grade reports the unit, is used for the terminal grade of self is reported the base station;
Described exented memory indication reports the unit, is used for the exented memory indication information of expression self EMS memory size is reported the base station;
Described Memory Allocation and processing unit, the Memory Allocation mode that is used for issuing according to the base station is each course allocation internal memory and processing reception data.
17, a kind of base station is characterized in that, this base station comprises: the terminal grade receiving element, and exented memory indication receiving element, maximum process are counted determining unit, internal memory preassignment unit and data dispatch transmission unit,
Described terminal grade receiving element is used for the terminal grade that receiving terminal reports, and sends to described internal memory preassignment and data dispatch transmission unit;
Described exented memory indication receiving element is used for the exented memory indication information that receiving terminal reports, and sends to described internal memory preassignment and data dispatch transmission unit;
Described maximum process is counted determining unit, is used for definite pairing maximum process of current ascending-descending subframes ratio and counts N;
Described internal memory preassignment unit is used for the described terminal grade according to terminal feedback, the indication of described exented memory and the maximum process supported is counted N, carries out the Memory Allocation pre-operation;
Described data dispatch transmission unit is used for carrying out data dispatch and transmission according to the memory size of each process of determining.
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| CN 200810104392 CN101567749B (en) | 2008-04-22 | 2008-04-22 | Method and device for downlink data transmission |
| PCT/CN2009/071408 WO2009129742A1 (en) | 2008-04-22 | 2009-04-22 | A method and device for downlink data transmission |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102348237A (en) * | 2011-10-28 | 2012-02-08 | 重庆邮电大学 | Data queuing method in broadband wireless communication system |
| CN106301704A (en) * | 2015-05-26 | 2017-01-04 | 苏州简约纳电子有限公司 | The caching method of HARQ data |
| CN109565671A (en) * | 2018-11-16 | 2019-04-02 | 北京小米移动软件有限公司 | Data transmission method and device |
| CN111078372A (en) * | 2019-12-20 | 2020-04-28 | 北京思特奇信息技术股份有限公司 | Automatic process management method and system |
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| CN111949492B (en) * | 2020-08-20 | 2023-01-06 | 深圳市锐尔觅移动通信有限公司 | System resource obtaining method and device and terminal equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ATE349828T1 (en) * | 2002-08-13 | 2007-01-15 | Matsushita Electric Ind Co Ltd | HYBRID AUTOMATIC REPOST REQUEST PROTOCOL |
| RU2349037C2 (en) * | 2004-11-03 | 2009-03-10 | Самсунг Электроникс Ко., Лтд. | System and method for information transfer/reception about possibility of buffer of hybrid self-acting inquiry of recurring transmission in communication system of broadband wireless access |
| CN100336332C (en) * | 2005-11-16 | 2007-09-05 | 中兴通讯股份有限公司 | Method for realizing mixing automatic re-transmit request in multi frequency cell |
| JP4788436B2 (en) * | 2006-03-29 | 2011-10-05 | 日本電気株式会社 | Radio resource allocation method, radio resource allocation apparatus using the same, and base station |
| CN1972177B (en) * | 2006-11-29 | 2010-04-21 | 北京邮电大学 | Method of jointly fixing automatic request retransmission and scheduling algorithm based on terminal feedback |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102348237A (en) * | 2011-10-28 | 2012-02-08 | 重庆邮电大学 | Data queuing method in broadband wireless communication system |
| CN102348237B (en) * | 2011-10-28 | 2014-07-16 | 重庆邮电大学 | Data queuing method in broadband wireless communication system |
| CN106301704A (en) * | 2015-05-26 | 2017-01-04 | 苏州简约纳电子有限公司 | The caching method of HARQ data |
| CN106301704B (en) * | 2015-05-26 | 2019-08-06 | 苏州简约纳电子有限公司 | The caching method of HARQ data |
| CN109565671A (en) * | 2018-11-16 | 2019-04-02 | 北京小米移动软件有限公司 | Data transmission method and device |
| WO2020097904A1 (en) * | 2018-11-16 | 2020-05-22 | 北京小米移动软件有限公司 | Data transmission method and apparatus |
| CN109565671B (en) * | 2018-11-16 | 2022-07-08 | 北京小米移动软件有限公司 | Data transmission method and device |
| US11871381B2 (en) | 2018-11-16 | 2024-01-09 | Beijing Xiaomi Mobile Software Co., Ltd. | Data transmission method and apparatus |
| CN111078372A (en) * | 2019-12-20 | 2020-04-28 | 北京思特奇信息技术股份有限公司 | Automatic process management method and system |
| CN111078372B (en) * | 2019-12-20 | 2023-08-08 | 北京思特奇信息技术股份有限公司 | Automatic process management method and system |
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| CN101567749B (en) | 2013-04-03 |
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