CN101567751A - Method, device and system for transmitting data based on time division duplex mode - Google Patents
Method, device and system for transmitting data based on time division duplex mode Download PDFInfo
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Abstract
The invention discloses a method for transmitting data based on time division duplex mode. The highest type class of a terminal is increased, corresponding maximum transmission block size and effective speed matching code rate are the same as those corresponding to the highest type class before the increase, and a corresponding terminal cache size meets the requirement of maximum process data transmission in a time division duplex (TDD) mode. A base station acquires the type class of the terminal; when the acquired type class is judged as the lowest type class, the effective speed matching code rate is determined again according to an index corresponding to the type class, and data is transmitted in the TDD mode; and otherwise, the effective speed matching code rate is determined according to the index corresponding to the acquired type class and an index corresponding to a type class one class lower than the acquired type class, and the data is transmitted in the TDD mode. The invention also discloses a device and a system for transmitting the data based on the TDD mode. The invention can utilize the prior type class of the terminal to the utmost, and ensure the data transmission performance in the TDD mode.
Description
Technical field
The present invention relates to data transmission technology, particularly a kind of data transmission method, device and system based on time division duplex (TDD, TimeDivision Duplexing) pattern.
Background technology
3G (Third Generation) Moblie (3G, 3
RdGeneration) adopt code division multiple access (CDMA, Code-Division Multiple Access) mode, support multimedia service, in several years of future, can have higher competitiveness.In order to ensure in the longer time, making 3G keep this competitiveness, third generation partnership plan (3GPP, Third Generation Partnership Project) started the Long Term Evolution (LTE of 3G wireless interface technology, Long Term Evolution) research project, it comprise reduce time delay, improve user data rate, improve power system capacity and covering, pith such as reduction operator cost.
In the present LTE system, when the base station sends data to terminal, can select Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplexing) pattern or tdd mode carries out, the highest support 8 process parallel transmissions of fdd mode wherein, and the tdd mode support is higher than the parallel transmission of 8 processes, as 9,10,12 or 15 process parallel transmissions.The transmission mode of respective base station, terminal also is typically designed to supports the double mode of tdd mode and fdd mode, simultaneously in order to support the mixing in the LTE system to retransmit (HARQ) mechanism automatically, terminal inner has a buffer, be used for when the data decode mistake that the base station is sent, the current reception data of buffer memory are when resending these data in the base station, use data in buffer that error correction is carried out in the decoding that receives data again, to improve the accuracy of decoding again.
No matter any pattern is selected in the base station when carrying out transfer of data, rate-matched is carried out according to the data that certain effective speed coupling code check subtend terminal sends in the capital, Fig. 1 a is that effective speed coupling code check is 1/3 o'clock a data structure schematic diagram, be example with a process in the base station transmits among this figure, information data accounts for 1/3 of data total length, and RV0～RV3 represents redundancy versions.Suppose that the maximum data block size that base station each in a process can be transmitted constantly is 1/3 of length shown in Fig. 1 a, if terminal is in first moment data decode mistake to receiving of this process, then this part data being multiply by 3 double-length degree stores in the buffer, and return the correct response that receives to the base station, the base station is after resending above-mentioned data, terminal will use data in buffer that error correction is carried out in the decoding of the data that receive again, if decode still mistake, the storage that then merges twice transmission in base station is to buffer, return the incorrect response that receives to the base station again, till decoding is correct.Other transfer of data are constantly also followed said process in this process.
On the matching way basis shown in Fig. 1 a, also there is a kind of finite rate internal memory coupling (LBRM, Limited Buffer Rate Marching) algorithm, promptly earlier information data is carried out 1/3 rate-matched, obtain the data structure shown in Fig. 1 a, again the data structure that obtains is punched, promptly give up some data according to certain rule, make the remaining information data in punching back account for 2/3 of data total length, promptly effective speed coupling code check is 2/3, and its data structure is shown in Fig. 1 b.In the LBRM algorithm, cache way in the HARQ mechanism and effective speed coupling code check is 1/3 o'clock identical, just terminal data in buffer behind decoding error has tailed off, reduced the capacity of buffer in the terminal, but the while is owing to the terminal buffers data volume reducing, the error correction information that can provide for the decoding that receives data has again also tailed off, reduced the accuracy of decoding again to a certain extent, therefore effective speed coupling code check is more near 1 or greater than 1 o'clock, and the performance of HARQ mechanism will variation in the LTE system.
Based on the principles well-known in the above-mentioned transfer of data, defined the type grade of terminal in the current standard, all corresponding index of each type grade comprises: maximum transmitted piece, effective speed coupling code check and terminal buffers device size.Specifically as shown in table 1, advise that simultaneously the base station is when using tdd mode also shown in the reference table 1, use the LBRM algorithm to change the effective speed coupling code check that when terminal transmission data, uses, no matter use fdd mode also to be to use tdd mode, all can use the buffer of identical size to realize terminal.
| The type grade | Maximum transmitted piece (bit) | Effective speed coupling code check | 8 process terminal buffers devices (bit) |
| Type grade 1 | [10040] | 1/3 | [242,880] |
| Type grade 2 | [50000] | 1/3 | [1,206,624] |
| Type grade 3 | [100000] | 2/3 | [1,206,624] |
| The type class 4 | [150112] | 2/3 | [1,811,232] |
| The type class 5 | [300064] | 2/3 | [3,620,256] |
Table 1
If definition according to current standard, terminal adopts under tdd mode and 8 buffer size that the process fdd mode is identical shown in the table 1, the base station just must increase corresponding effective speed rate matched so, table 2 has provided terminal when using the buffer size identical with 8 processes under the fdd mode under tdd mode, and 9,10,12 and 15 process base stations need the effective speed rate matched used respectively.
Table 2
As can be seen from Table 2, if under tdd mode, still use the undefined terminal buffers device of fdd mode size, then at type grade 3 to 5, when the base station is used tdd mode and is adopted 10 process to 15 processes to send data, the effective speed coupling code check that needs to adopt will reduce the LTE systematic function obviously near 1 even above 1.If consider another approach, promptly make in order to guarantee the LTE systematic function base station adopt under the tdd mode with fdd mode under identical effective speed coupling code check, then the buffer size of terminal needs significantly raising, can the performance of terminal be impacted.Therefore it is worthless in the prior art type grade under the fdd mode directly being corresponded in the application of tdd mode.
Summary of the invention
In view of this, first purpose of the present invention is to provide a kind of data transmission method based on tdd mode, uses this method can utilize existing terminal type grade to greatest extent, and guarantees the data transmission performance under the tdd mode.
Second purpose of the present invention is to provide a kind of base station side device, uses this base station side device can utilize existing terminal type grade to greatest extent, and guarantees the data transmission performance under the tdd mode.
The 3rd purpose of the present invention is to provide a kind of terminal, uses this terminal can utilize existing terminal type grade to greatest extent, and guarantees the data transmission performance under the tdd mode.
The 4th purpose of the present invention is to provide a kind of system based on tdd mode, uses this system can utilize existing terminal type grade to greatest extent, and guarantees the data transmission performance under the tdd mode.
Technical scheme of the present invention is achieved in that
A kind of data transmission method based on TDD mode is provided with terminal type grade from low to high, and all types of grades are all to having index maximum transport block size, effective speed coupling code check, terminal buffers device size and process number; Key is, increases a type grade the highest; The maximum transport block size of the highest type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the TDD pattern; This method also comprises:
The base station obtains the support type grade of terminal to report;
The base station judges whether the described type grade of obtaining is minimum type grade, if then according to the pairing index of minimum type grade, redefines effective speed coupling code check, uses tdd mode to send data to terminal; According to the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine effective speed coupling code check if not then, use tdd mode to send data to terminal.
Preferably, described base station obtains after the support type grade of terminal to report, judge that whether the described type grade of obtaining is before the minimum type grade, further comprises:
The base station disposes according to time slot ratio, determines the current actual maximum process number that uses;
The base station judges that the described current actual maximum process number that uses is whether greater than the process number of the type grade correspondence of obtaining, do not support the described current actual maximum process number that uses if then determine the buffer size of terminal, continue to carry out the base station then and judge whether the described type grade of obtaining is the step of minimum type grade; Support the described current actual maximum process number that uses if not the buffer size of then determining terminal, the base station uses tdd mode to send data to terminal according to the pairing index of type grade of terminal then.
Preferably, the described effective speed coupling code check that redefines is:
If the base station judges that the described type grade of obtaining is minimum type grade, the maximum process number that use can be supported multiply by the pairing effective speed coupling of minimum type grade code check again divided by the pairing process number of the type grade of obtaining;
Perhaps, if the base station judges that the described type grade of obtaining is not minimum type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number that to support, again divided by the pairing terminal buffers device of the type grade size of obtaining than the low grade of the type grade of obtaining.
Preferably, the described effective speed coupling code check that redefines is:
If it is minimum type grade that the type grade of described terminal to report is judged in the base station, use the current actual maximum process number that uses divided by the pairing process number of the type grade of obtaining, multiply by the pairing effective speed coupling of minimum type grade code check again;
Perhaps, if the base station judges that the described type grade of obtaining is not minimum type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number of current actual use, again divided by than the pairing terminal buffers device of the type grade size of obtaining than the low grade of the type grade of obtaining.
Preferably, when the buffer size of determining terminal supported that the described current actual maximum process of using is counted, described base station used tdd mode before terminal sends data, further comprises:
The base station uses the current actual maximum process number that uses divided by the pairing process number of the type grade of obtaining, multiply by the pairing effective speed coupling of the described type grade of obtaining code check again, draw and redefine effective speed coupling code check, carry out step from data to terminal that use tdd mode to send again.
A kind of base station side device, key are that this base station side device comprises:
Memory module is used for storage terminal type grade from low to high, and all types of grades are all to having index maximum transport block size, effective speed coupling code check, terminal buffers device size and process number; The type grade the highest that storage increases, the maximum transport block size of the highest terminal type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the tdd mode;
Acquisition module is used to obtain the support type grade of terminal to report;
First judge module is used to read the type grade of memory module storage, judges whether the type grade that described acquisition module obtains is minimum type grade;
First Executive Module, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, according to the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal; At described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, according to the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the type grade of obtaining, redefine effective speed coupling code check, use tdd mode to send data to terminal.
Preferably, further comprise in this base station side device:
Second judge module is used for according to the time slot ratio configuration, determines the current actual maximum process number that uses; Judge the process number of the type grade the correspondence whether described current actual maximum process number that uses obtains greater than acquisition module, if not sending the notice of executable operations to second Executive Module, otherwise send the notice of executable operations to described first judge module;
Second Executive Module is used to receive the notice of the executable operations that described second judge module sends, and according to the pairing index of type grade that described acquisition module obtains, uses tdd mode to send data to terminal;
Described first judge module is further used for receiving the notice of the executable operations that described second judge module sends.
Preferably, described first Executive Module comprises:
First performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, the process number of the type grade correspondence that the maximum process number that use can be supported obtains divided by acquisition module, multiply by the pairing effective speed coupling of minimum type grade code check again and draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal;
Second performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number that to support than the low grade of the type grade of obtaining, again divided by the pairing terminal buffers device of the type grade size of obtaining, draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
Preferably, described first Executive Module comprises:
The 3rd performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, use the current actual maximum process number that uses divided by the pairing process number of the described type grade of obtaining, multiply by the pairing effective speed coupling of minimum type grade code check again and draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal;
The 4th performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, use the pairing maximum transport block size of type grade to multiply by the current actual maximum process number that uses than the low grade of the type grade of obtaining, again divided by the pairing terminal buffers device of the type grade size of obtaining, draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
Preferably, described second Executive Module comprises:
Computing unit is used to use the current actual maximum process number that uses divided by the pairing process number of the described type grade of obtaining, and multiply by the pairing effective speed coupling of the described type grade of obtaining code check again, draws and redefines effective speed coupling code check;
The 5th performance element is used to receive the notice of the executable operations that described second judge module sends, and the effective speed that the redefines coupling code check according to computing unit draws uses tdd mode to send data to terminal.
A kind of terminal, key are that this terminal comprises:
Reporting module is used for reporting the type grade of self supporting to the base station side device;
Receiver module, be used to receive the data that the base station side device uses tdd mode to send, described data are that the base station side device is judged when the type grade of terminal is minimum type grade, use the pairing index of minimum type grade, redefine that effective speed coupling code check sends, perhaps described data are that the base station is judged when the type of terminal is not minimum type grade, use the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine that effective speed coupling code check sends.
A kind of data transmission system based on TDD mode, key are that this system comprises:
The base station side device is used for the type grade from low to high of storage terminal, the equal corresponding index maximum transport block size of all types of grades, effective speed coupling code check, terminal buffers device size and process number; The type grade the highest that storage increases, the maximum transport block size of the highest terminal type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the tdd mode; Obtain the support type grade of current terminal to report, judge whether the described type grade of obtaining is minimum type grade, if then according to the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal; According to the pairing index of type grade obtained and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine effective speed coupling code check if not then, use tdd mode to send data to terminal;
Terminal is used for reporting the type grade of self supporting to the base station side device; Receive the data that the base station side device uses tdd mode to send.
By above technical scheme as can be seen, the present invention is based on data transmission method, device and the system of tdd mode, based on existing terminal type grade, increased a type grade the highest, the maximum transport block size of the highest type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and its corresponding terminal buffers device size meets the requirement of maximum process data transmission under the TDD pattern.In data transmission procedure, if the type grade of the terminal of obtaining is minimum type grade, then use the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal; If the type grade of the terminal of obtaining is not minimum type grade, the pairing index of type grade of then using the described pairing index of obtaining of type grade and hanging down one-level than the described type grade of obtaining, redefine effective speed coupling code check, use tdd mode to send data to terminal.Can draw through actual calculation, the effective speed coupling code check value that redefines under above-mentioned two kinds of situations, all can guarantee less than and keep off 1, thereby guaranteed the data transmission performance under the tdd mode, simultaneously only increased a type grade the highest, utilized existing terminal type grade to greatest extent based on existing terminal type grade.
Description of drawings
Fig. 1 a is that effective speed coupling code check is 1/3 o'clock a data structure schematic diagram in the prior art;
Fig. 1 b is that effective speed coupling code check is 2/3 o'clock a data structure schematic diagram in the prior art;
Fig. 2 is the transfer of data flow process figure that the present invention is based on tdd mode;
Fig. 3 is the structural representation of base station side device of the present invention;
Fig. 4 is the structural representation of terminal of the present invention.
Embodiment
For making objects and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples, and these explanations are nonrestrictive.
In method provided by the invention, be provided with the type grade from low to high of terminal, all types of grades are all to having index maximum transport block size, effective speed coupling code check, terminal buffers device size and buffer size and process number.The above-mentioned type grade can with current standard in define identical.The present invention has increased a type grade the highest on this basis, its pairing maximum transport block size and effective speed coupling code check with increase before the pairing identical and corresponding cache device size of the highest type grade meet the requirement that maximum process data is transmitted under the tdd mode.
With the maximum process under the tdd mode be 15 and the pairing process number of terminal type grade that is provided be 8 to be example, the highest type grade that table 3 has provided above-mentioned increase with increase before the relation of the highest type grade.
| The type grade | Maximum transmitted piece (bit) | Effective speed coupling code check | 8 process cache device sizes (bit) |
| The type class 5 | [300064] | 2/3 | [3,620,256] |
| The type class 6 | [300064] | 2/3 | [6,787,980] |
Table 3
As can be seen from Table 3, the highest type class 6 that increases, support the maximum transport block size of type class 5, and adopt identical effective speed coupling code check 2/3 to guarantee the performance of LTE system, just on buffer size, at the type class 5, according to its corresponding maximum transport block size and effective speed coupling code check, obtain 300064* (3/2) * 8＜3620256, it is the transfer of data that type class 5 maximum can only be supported 8 processes, and at the type class 6 that increases, according to its corresponding maximum transport block size and effective speed coupling code check, obtain 300064* (3/2) * 15＜6787980, the promptly maximum transfer of data that can support 15 processes meets the requirement of the maximum process transmission of tdd mode.
According to above setting and increase to the type grade, method provided by the invention can be carried out according to following flow process shown in Figure 2:
Step 201: the base station obtains the support type grade of terminal to report.
In this step, the base station obtains the type grade of terminal can carry out according to usual way, and promptly terminal can report the essential information of self to the base station when the access base station coverage, comprising terminal iidentification, type grade etc.The above-mentioned information of terminal to report is stored in the base station, when needs are known the type grade of certain terminal, searches immediately from canned data and gets final product.
Step 202: the base station judges whether the type grade obtain is minimum type grade, if execution in step 203 then, otherwise direct execution in step 204.
Step 203: according to the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal, process ends.
In this step, redefine effective speed coupling code check method can for: the maximum process number that use can be supported (for example 15 processes) multiply by the pairing effective speed coupling of minimum type grade code check again divided by the process number of the type grade correspondence of obtaining; Perhaps, use current actual maximum (for example 10 processes) the process number that uses, multiply by the pairing effective speed coupling of minimum type grade code check again divided by the pairing process number of the type grade of obtaining.
The maximum process number that can support in this step, refer to the LTE system the maximum process number that can support; The above-mentioned current actual maximum process number that uses is that the base station disposes going out of determining according to time slot ratio, and this concrete grammar of determining is the known technology of this area, will provide hereinafter and briefly introduce.
Step 204: according to the pairing index of obtaining of type grade with than the pairing index of type grade of the low one-level of the type grade of obtaining, redefine effective speed coupling code check, use tdd mode to send data to terminal, process ends.
In this step, redefine effective speed coupling code check method can for: use the pairing maximum transport block size of type grade of hanging down a grade to multiply by the maximum process number (for example 15 processes) that can support, again divided by the pairing terminal buffers device of the type grade size of obtaining than the type grade of obtaining; Perhaps, use the pairing maximum transport block size of type grade to multiply by the current actual maximum process number (for example 10 processes) that uses, again divided by the pairing terminal buffers device of the type grade size of obtaining than the low grade of the type grade of obtaining.
The maximum process number that can support in this step and the current actual maximum process number that uses are identical with implication in the above-mentioned steps 203.
Above-mentioned steps 203～step 204 has been described transfer of data is carried out in base station in the inventive method according to the type grade of obtaining principle, can be called static degradation using priciple, comprise that with the type grade before increasing the process number of 5 grades and these 5 grades of type grade correspondences is 8 is example, this principle can be summarized as follows:
1) for type grade 2, the type grade 2 pairing indexs are used in the base station under fdd mode, and type of service grade 2 and type grade 1 pairing index redefine effective speed coupling code check under tdd mode;
2) for type grade 3, the type grade 3 pairing indexs are used in the base station under fdd mode, and type of service grade 3 and type grade 2 pairing indexs redefine effective speed coupling code check under tdd mode;
3) for the type class 4, the pairing index of the type class 4 is used in the base station under fdd mode, and type of service class 4 and type grade 3 pairing indexs redefine effective speed coupling code check under tdd mode;
4) for the type class 5, the pairing index of the type class 5 is used in the base station under fdd mode, and type of service class 5 and the pairing index of type class 4 redefine effective speed coupling code check under tdd mode;
5) for the type class 6, does not use under fdd mode the base station, and type of service class 6 and the pairing index of type class 5 redefine effective speed coupling code check under tdd mode;
6) for type grade 1, the type grade 1 pairing index is used in the base station under fdd mode, and also type of service grade 1 pairing index redefines effective speed coupling code check under tdd mode.
Above-mentioned 1) description is identical in the method that redefines effective speed coupling code check～6) and step 203 and the step 204.
Table 4 has provided above-mentioned 1)～6) under the static state degradation principle described, the effective speed coupling code check contrast that use the base station under fdd mode and the tdd mode, wherein under tdd mode, effective speed coupling code check all redefines according to 15 processes of maximum.
Table 4
As can be seen from Table 4, by static degradation using priciple of the present invention, under tdd mode, the base station can be based on a type grade the highest of former type grade and increase, make transfer of data meet the requirement of tdd mode by redefining effective speed coupling code check, the effective speed coupling code check of base station use simultaneously can guarantee the performance of LTE system again, therefore the data transmission method under the tdd mode of the present invention guarantees the data transmission performance under the tdd mode to greatest extent based on terminal type under the fdd mode and buffer size.
On the basis of above-mentioned steps 201～step 204, can also increase some steps, can carry out transfer of data continuing to use the existing pairing index of type grade to realize the base station, and use above-mentioned static degradation using priciple to carry out selecting flexibly between the transfer of data, thereby increased the flexibility of base station operation.In order to realize this purpose, before step 202, may further include:
In this step, the current actual maximum process number that uses can be determined according to the configuration of the time slot ratio in the LTE system in the base station, and this and usual way are identical.Table 5 shows the corresponding relation of system time gap proportional arrangement and process number, and this corresponding relation is the common practise of this area, and DL wherein refers to descending sub frame, and UL refers to sub-frame of uplink, and DwPTS refers to descending pilot frequency time slot.
Table 5
In this step, if the buffer size of terminal is supported the described current actual maximum process number that uses, then the base station can be according to the pairing every index of the type grade of obtaining, use tdd mode directly to send data to terminal, also can be according to the current actual maximum process number that uses, redefine effective speed coupling code check, re-use tdd mode and send data to terminal.Be exactly according to the current actual maximum process number (as 4,6 or 7 processes) that uses in the following table 6, redefine effective speed coupling code check for example.Redefine effective speed coupling code check method can for: the process number (as 8 processes) of the current actual maximum process number (as 6 processes) that uses divided by the type grade correspondence of obtaining used in the base station, multiply by the pairing effective speed coupling of the described type grade of obtaining code check again, draw the effective speed coupling code check that redefines.
If the buffer size of terminal is not supported the described current actual maximum process number that uses, the base station can continue to carry out according to the degradation principle the follow-up flow process of transfer of data according to the description of step 202～step 204.
In this step, the static state degradation that both can continue to use in the table 4 to be introduced uses the corresponding effective speed coupling code check in back, at this moment no matter how many current actual maximum process numbers that uses in base station is, effective speed coupling code check all redefines according to the maximum process number that can support.Certainly also can further carry out refinement here according to the current time slot ratio his-and-hers watches 4 listed contents in base station, as shown in table 6, at the different situations (as 9,10 or 12 processes) of the current actual maximum process number that uses in base station, the definite method and the method in step 203 and the step 204 of effective speed coupling code check are similar.
Table 6
In the effective speed coupling code check that redefines out at different processes shown in the above-mentioned table 6, with the female sign indicating number of a rate-matched code check is 1/3 to be example, if mate code check less than 1/3 by the effective speed that calculates, all be similar to and be taken as 1/3, this approximate value is the common practise of this area, repeats no more here.
The entire flow that above-mentioned steps 201～204 integrating steps 201a～step 201c constitutes, also can be called and use dynamic degradation principle, promptly at first judge that by the base station the current actual maximum process number that uses is whether greater than the process number of the type grade correspondence of terminal to report, the effective speed coupling code check that uses the pairing index of type grade obtained or use to redefine if not informing base station then carries out transfer of data and gets final product under tdd mode, use static degradation principle to carry out transfer of data if reinform the base station, thereby avoided the fixing static state degradation principle of using under tdd mode, increased the flexibility of base station operation.
Corresponding the invention described above is based on the data transmission method of tdd mode, and the present invention also provides a kind of base station side device and terminal based on tdd mode.
Fig. 3 is the structural representation of base station side device of the present invention, and this base station example device comprises:
Memory module is used to store the type grade from low to high of terminal under the fdd mode, the equal corresponding index maximum transport block size of all types of grades, effective speed coupling code check, terminal buffers device size and process number; The type grade the highest that storage increases, the maximum transport block size of the highest terminal type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the tdd mode.
Acquisition module is used to obtain the support type grade of terminal to report.
First judge module is used to read the type grade of memory module storage, judges whether the type grade that described acquisition module obtains is minimum type grade.
First Executive Module, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, according to the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal; At described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, according to the index of the type grade correspondence of obtaining and the pairing index of type grade of hanging down one-level than the type grade of obtaining, redefine effective speed coupling code check, use tdd mode to send data to terminal.
In order further to increase the flexibility of base station side device operation, can further include in this base station side device:
Second judge module is used for according to the time slot ratio configuration, determines the current actual maximum process number that uses; Judge the process number of the type grade the correspondence whether described current actual maximum process number that uses obtains greater than acquisition module, if not sending the notice of executable operations to second Executive Module, otherwise send the notice of executable operations to described first judge module.
Second Executive Module is used to receive the notice of the executable operations that described second judge module sends, and according to the pairing index of type grade that described acquisition module obtains, uses tdd mode to send data to terminal.
Described first judge module is further used for receiving the notice of the executable operations that described second judge module sends.
Second judge module and second Executive Module by above-mentioned increase, the base station side device can be fixed and use static degradation principle to carry out transfer of data, but can be after the notice that receives the terminal transmission, selection is directly carried out transfer of data according to the pairing index of obtaining of type grade, thereby increases the flexibility of base station side device operation.
The operation that above-mentioned first Executive Module redefines effective speed coupling code check can realize that the first corresponding Executive Module can comprise following two kinds of internal structures by dual mode:
The first, first Executive Module comprises: first carries out subelement and second carries out subelement.
First performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, the process number of the type grade correspondence that the maximum process number that use can be supported obtains divided by acquisition module, multiply by the pairing effective speed coupling of minimum type grade code check again and draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
Second performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number that to support than the low grade of the type grade of obtaining, again divided by the pairing terminal buffers device of the type grade size of obtaining, draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
The second, first Executive Module comprises: the 3rd carries out subelement and the 4th carries out subelement.
The 3rd performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, use the current actual maximum process number that uses divided by the pairing process number of the described type grade of obtaining, multiply by the pairing effective speed coupling of minimum type grade code check again and draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
The 4th performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, use the pairing maximum transport block size of type grade to multiply by the current actual maximum process number that uses than the low grade of the type grade of obtaining, again divided by the pairing terminal buffers device of the type grade size of obtaining, draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
Based on two kinds of internal structures of first Executive Module, the internal structure of above-mentioned second Executive Module can comprise:
Computing unit is used to use the current actual maximum process number that uses divided by the pairing process number of the described type grade of obtaining, and multiply by the pairing effective speed coupling of the described type grade of obtaining code check again, draws and redefines effective speed coupling code check.
The 5th performance element is used to receive the notice of the executable operations that described second judge module sends, and the effective speed that the redefines coupling code check according to computing unit draws uses tdd mode to send data to terminal.
Fig. 4 comprises for the structural representation of the terminal under the tdd mode of the present invention, this terminal:
Reporting module is used for reporting the type grade of self supporting to the base station side device.
Receiver module, be used to receive the data that the base station uses tdd mode to send, described data are that the base station side device is judged when the type grade of terminal is minimum type grade, according to the pairing index of minimum type grade, redefine that effective speed coupling code check sends, perhaps described data are that the base station is judged when the type of terminal is not minimum type grade, according to the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine that effective speed coupling code check sends.
Base station side device and terminal that the invention described above provides can make up, and become the data transmission system that the present invention is based on tdd mode, and base station side device, terminal and system all can be according to method work provided by the invention.
In sum, more than be the preferred embodiment of present embodiment only, be 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 (12)
1, a kind of data transmission method based on TDD mode is provided with terminal type grade from low to high, and all types of grades are all to having index maximum transport block size, effective speed coupling code check, terminal buffers device size and process number; It is characterized in that, increase a type grade the highest; The maximum transport block size of the highest type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the TDD pattern; This method also comprises:
The base station obtains the support type grade of terminal to report;
The base station judges whether the described type grade of obtaining is minimum type grade, if then according to the pairing index of minimum type grade, redefines effective speed coupling code check, uses tdd mode to send data to terminal; According to the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine effective speed coupling code check if not then, use tdd mode to send data to terminal.
2, the method for claim 1 is characterized in that, described base station obtains after the support type grade of terminal to report, judge that whether the described type grade of obtaining is before the minimum type grade, further comprises:
The base station disposes according to time slot ratio, determines the current actual maximum process number that uses;
The base station judges that the described current actual maximum process number that uses is whether greater than the process number of the type grade correspondence of obtaining, do not support the described current actual maximum process number that uses if then determine the buffer size of terminal, continue to carry out the base station then and judge whether the described type grade of obtaining is the step of minimum type grade; Support the described current actual maximum process number that uses if not the buffer size of then determining terminal, the base station uses tdd mode to send data to terminal according to the pairing index of type grade of terminal then.
3, method as claimed in claim 2 is characterized in that, the described effective speed coupling code check that redefines is:
If the base station judges that the described type grade of obtaining is minimum type grade, the maximum process number that use can be supported multiply by the pairing effective speed coupling of minimum type grade code check again divided by the pairing process number of the type grade of obtaining;
Perhaps, if the base station judges that the described type grade of obtaining is not minimum type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number that to support, again divided by the pairing terminal buffers device of the type grade size of obtaining than the low grade of the type grade of obtaining.
4, method as claimed in claim 2 is characterized in that, the described effective speed coupling code check that redefines is:
If it is minimum type grade that the type grade of described terminal to report is judged in the base station, use the current actual maximum process number that uses divided by the pairing process number of the type grade of obtaining, multiply by the pairing effective speed coupling of minimum type grade code check again;
Perhaps, if the base station judges that the described type grade of obtaining is not minimum type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number of current actual use, again divided by than the pairing terminal buffers device of the type grade size of obtaining than the low grade of the type grade of obtaining.
As claim 3 or 4 described methods, it is characterized in that 5, when the buffer size of determining terminal supported that the described current actual maximum process of using is counted, described base station used tdd mode before terminal sends data, further comprises:
The base station uses the current actual maximum process number that uses divided by the pairing process number of the type grade of obtaining, multiply by the pairing effective speed coupling of the described type grade of obtaining code check again, draw and redefine effective speed coupling code check, carry out step from data to terminal that use tdd mode to send again.
6, a kind of base station side device is characterized in that, this base station side device comprises:
Memory module is used for storage terminal type grade from low to high, and all types of grades are all to having index maximum transport block size, effective speed coupling code check, terminal buffers device size and process number; The type grade the highest that storage increases, the maximum transport block size of the highest terminal type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the tdd mode;
Acquisition module is used to obtain the support type grade of terminal to report;
First judge module is used to read the type grade of memory module storage, judges whether the type grade that described acquisition module obtains is minimum type grade;
First Executive Module, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, according to the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal; At described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, according to the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the type grade of obtaining, redefine effective speed coupling code check, use tdd mode to send data to terminal.
7, base station side device as claimed in claim 6 is characterized in that, further comprises in this base station side device:
Second judge module is used for according to the time slot ratio configuration, determines the current actual maximum process number that uses; Judge the process number of the type grade the correspondence whether described current actual maximum process number that uses obtains greater than acquisition module, if not sending the notice of executable operations to second Executive Module, otherwise send the notice of executable operations to described first judge module;
Second Executive Module is used to receive the notice of the executable operations that described second judge module sends, and according to the pairing index of type grade that described acquisition module obtains, uses tdd mode to send data to terminal;
Described first judge module is further used for receiving the notice of the executable operations that described second judge module sends.
8, base station side device as claimed in claim 7 is characterized in that, described first Executive Module comprises:
First performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, the process number of the type grade correspondence that the maximum process number that use can be supported obtains divided by acquisition module, multiply by the pairing effective speed coupling of minimum type grade code check again and draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal;
Second performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, use the pairing maximum transport block size of type grade to multiply by the maximum process number that to support than the low grade of the type grade of obtaining, again divided by the pairing terminal buffers device of the type grade size of obtaining, draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
9, base station side device as claimed in claim 7 is characterized in that, described first Executive Module comprises:
The 3rd performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be minimum type grade, use the current actual maximum process number that uses divided by the pairing process number of the described type grade of obtaining, multiply by the pairing effective speed coupling of minimum type grade code check again and draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal;
The 4th performance element, be used at described first judge module when to draw type grade that described acquisition module obtains be not minimum terminal type grade, use the pairing maximum transport block size of type grade to multiply by the current actual maximum process number that uses than the low grade of the type grade of obtaining, again divided by the pairing terminal buffers device of the type grade size of obtaining, draw the effective speed coupling code check that redefines, use tdd mode to send data to terminal.
10, base station side device as claimed in claim 8 or 9 is characterized in that described second Executive Module comprises:
Computing unit is used to use the current actual maximum process number that uses divided by the pairing process number of the described type grade of obtaining, and multiply by the pairing effective speed coupling of the described type grade of obtaining code check again, draws and redefines effective speed coupling code check;
The 5th performance element is used to receive the notice of the executable operations that described second judge module sends, and the effective speed that the redefines coupling code check according to computing unit draws uses tdd mode to send data to terminal.
11, a kind of terminal is characterized in that, this terminal comprises:
Reporting module is used for reporting the type grade of self supporting to the base station side device;
Receiver module, be used to receive the data that the base station side device uses tdd mode to send, described data are that the base station side device is judged when the type grade of terminal is minimum type grade, use the pairing index of minimum type grade, redefine that effective speed coupling code check sends, perhaps described data are that the base station is judged when the type of terminal is not minimum type grade, use the described pairing index of obtaining of type grade and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine that effective speed coupling code check sends.
12, a kind of data transmission system based on TDD mode is characterized in that, this system comprises:
The base station side device is used for the type grade from low to high of storage terminal, the equal corresponding index maximum transport block size of all types of grades, effective speed coupling code check, terminal buffers device size and process number; The type grade the highest that storage increases, the maximum transport block size of the highest terminal type grade correspondence of described increase is mated code check and increases the highest preceding type grade pairing identical with effective speed, and corresponding terminal buffers device size meets the requirement of maximum process data transmission under the tdd mode; Obtain the support type grade of current terminal to report, judge whether the described type grade of obtaining is minimum type grade, if then according to the pairing index of minimum type grade, redefine effective speed coupling code check, use tdd mode to send data to terminal; According to the pairing index of type grade obtained and than the pairing index of type grade of the low one-level of the described type grade of obtaining, redefine effective speed coupling code check if not then, use tdd mode to send data to terminal;
Terminal is used for reporting the type grade of self supporting to the base station side device; Receive the data that the base station side device uses tdd mode to send.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101806A1 (en) * | 2015-12-15 | 2017-06-22 | 中兴通讯股份有限公司 | Method and apparatus for acquiring network operation-and-maintenance (o&m) data |
| CN108737997A (en) * | 2017-04-21 | 2018-11-02 | 展讯通信（上海）有限公司 | Adjust method, equipment and the system of data packet transmission rates |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100375572C (en) * | 2004-04-08 | 2008-03-12 | 大唐移动通信设备有限公司 | Method for controlling non-realtime service data transmission of mobile terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101806A1 (en) * | 2015-12-15 | 2017-06-22 | 中兴通讯股份有限公司 | Method and apparatus for acquiring network operation-and-maintenance (o&m) data |
| CN108737997A (en) * | 2017-04-21 | 2018-11-02 | 展讯通信（上海）有限公司 | Adjust method, equipment and the system of data packet transmission rates |
| CN108737997B (en) * | 2017-04-21 | 2020-11-27 | 展讯通信（上海）有限公司 | Method, equipment and system for adjusting data packet transmission rate |
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