CN101034961B - Management method and device of IR buffer in the multi-process HARQ technology - Google Patents
Management method and device of IR buffer in the multi-process HARQ technology Download PDFInfo
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Abstract
The invention advances a management method for dynamically managing IR buffers of multi-process HARQ technique, making dynamic allocation of IR buffers of multi-process HARQ technique to make each process able to occupy the physical space of IR buffer only when needing to store data, and when data decoding in some process succeeds, this process will occupy no more physical space of IR buffer so as to raise IR buffer utilization efficiency. And the invention also advances a device for managing IR buffers by the management method.
Description
Technical field
The middle user terminal (abbreviating UE as) of TDS-CDMA system (being called for short the TD-SCDMA system) that the present invention relates to a kind of radio mobile communication mixes the management method and the device of automatic repeat requests (abbreviating HARQ as) virtual technology buffer memory.
Background technology:
In the TD-SCDMA system, because the influence of wireless transmission environment, signal interference or the like, mobile radio terminal (being called for short UE) receives, the process of deal with data often once just can not finished, when the appearance decoding is unsuccessful, also need transmitting terminal to resend data, receive once more, handle by UE, promptly so-called data re-transmission.For reducing meaningless data re-transmission, usually be provided with maximum retransmission in the TD-SCDMA system, promptly when data re-transmission reaches maximum retransmission, just no longer proceed, thereby finish whole data transmission, reception and processing procedure.
Hybrid automatic repeat request technology in the TD-SCDMA system (abbreviating the HARQ technology as) is a kind of error detection techniques that generally is used for the non-real-time data service, and it combines automatic repeat requests (abbreviating ARQ as) and two technology of forward error correction (abbreviating FEC as).Receiving terminal is decoded to the data that receive, and sends feedback signal according to CRC (abbreviating CRC as) result to transmitting terminal.If CRC check is correct, send affirmative acknowledgement (abbreviating ACK as) signal; If CRC check mistake, then send negative response (abbreviating NACK as) signal, and with the data that receive preserve the data (abbreviating data retransmission as) that resend with transmitting terminal merge after decoding, up to decoding success or reach maximum retransmission.
3 types HARQ technology has been proposed in the 3GPP agreement:
First kind HARQ:UE end directly abandons the data of decoding error, and requires the transmitting terminal data retransmission, and data retransmission is identical with first biography data.The memory space that this method takies is less, but has the lower defective of error correcting capability.
The second class HARQ: the HARQ technology that belongs to incremental redundancy.The data that the UE end is preserved decoding error are decoded with the redundant information merging that retransmits afterwards.Data retransmission is different with first biography data, and it only carries new redundant information, and itself does not possess the self-demarking code ability.UE carries out sign indicating number with the data of new redundant information and the decoding error preserved and merges, and forms the stronger forward error correction of error correcting capability, and error rate is further reduced.This method need take bigger memory space, but error correcting capability is stronger.
The 3rd class HARQ: similar to the second class HARQ, the data of decoding error are saved at UE end, decode after merging with follow-up data retransmission.Different with the second class HARQ is that data retransmission carries systematic bits, possesses the self-demarking code ability, and the redundancy versions that carries also can be different.This method need take bigger memory space, and error correcting capability is also stronger.
The HARQ technology of counting the TD-SCDMA system according to the process of transfer of data is divided into one process and multi-process again.
So-called one process is meant that transmitting terminal sends data, and UE receives and decoding, successfully just sends ack signal if decode, and the notice transmitting terminal is decoded successfully, and decoding this time finishes, and transmitting terminal sends new data; Otherwise UE sends the NACK signal, notice transmitting terminal decoding error, simultaneously, preserve the decoding error data, transmitting terminal sends data retransmission, by UE receive and merge with the decoding error data of preserving, decoding, so repeatedly, up to the decoding success or reach maximum retransmission.
So-called multi-process is meant that transmitting terminal sends data successively according to process number, and UE receives successively according to process number and decodes, and sends ACK or NACK signal according to decoded results to transmitting terminal.When transmitting terminal receives the NACK signal of a certain process, just interrupt sending data successively immediately according to process number, retransmit the data of this process according to the process number of NACK signal, treat that data retransmission sends after, send data successively according to process number again.When after data send first of each process, transmitting terminal is again according to number of retransmissions and process number data retransmission successively, equally, when transmitting terminal receives the NACK signal of a certain process, just interrupt sending data successively immediately according to number of retransmissions and process number, retransmit the data of this process according to the process number of NACK signal, after treating that data retransmission sends, send data successively according to number of retransmissions and process number again, so repeatedly, up to the data decode success of whole processes or reach maximum retransmission.
Be not difficult to find out that from the above description the HARQ technology of multi-process has process such as the reception, sign indicating number merging, preservation, decoding of a plurality of data repeating, intersecting and carry out.And for a certain process, processes such as the reception of data, sign indicating number merging, preservation, decoding are in sequence, even receive the data of other processes during this period, also only can preserve, and can not interrupt the data processing of this process.Obviously, for guaranteeing the normal operation of system, must guarantee to have enough memory spaces.
Prior art is that the maximum process number of corresponding HARQ instance technology is 8 characteristics, virtual cache (being called for short the IR buffer memory) design is divided into the memory space equal and opposite in direction, and memory space is not less than 8 independent cache blocks of individual process required storage, by process number the cache blocks of each process is selected.Though such design can not exist certain process to IR buffer memory demand quantitative change cover the situation of other process data greatly, but, the IR buffer memory total amount stipulated in the standard of the summation of the required storage of Que Dinging (for example user class is 15, and the required storage determined of design is about 2 times of the IR buffer memory total amount stipulated in the standard thus) thus.In addition, prior art is divided the method for independent cache blocks, and also may cause is needing the waste of hour cache resources of memory space.
In addition, in the TD-SCDMA system HARQ technology receive, the process of deal with data at UE (for example: mobile phone) finish.Along with UE does littler and littler, does thinner and thinner, the space resources of UE is more and more nervous.On the other hand, along with the increase of data services such as multimedia, need the data volume of HARQ resume module also increasing, need the data volume of storage (or buffer memory) also increasing, certainly will cause the increase of HARQ module volume, can not effectively reduce in other words, the design of UE is brought difficulty.If the insufficient memory of UE will cause the covering of data or lose, cause a large amount of re-transmission of transmitting terminal needs, strengthened offered load greatly, may cause the obstruction or the paralysis of system the most at last.
Summary of the invention
For solving the above-mentioned deficiency of prior art, the present invention proposes a kind of management method that multi-process HARQ technology IR buffer memory is carried out dynamic management, IR buffer memory to multi-process HARQ technology is carried out dynamic assignment, make each process when needs are preserved data, the actual IR buffer memory physical space that takies of, after the data decode success of a certain process, just no longer take IR buffer memory physical space, to improve the service efficiency of IR buffer memory.The invention allows for a kind of device that adopts management method of the present invention that the IR buffer memory is managed.
Management method of the present invention is according to waiting to preserve the identification information of data, wait to preserve the preservation position of data in the IR buffer memory according to IR buffer address order assignment from low to high, preserve the additional information of these data simultaneously, read this data according to the additional information of preserving data.
The data to be preserved of management method of the present invention comprise first data and the merging data (being the data after decoding error data and data retransmission merge) of passing, and its identification information comprises: the process number of data, number of retransmissions and data length.
Management method of the present invention waits to preserve the preservation position of data in the IR buffer memory according to IR buffer address order assignment from low to high, being about to wait to preserve the minimum address blank space of the length of data and buffer address compares, if data to be preserved are enough preserved in the address blank space, then deposit data to be preserved in this address blank space, otherwise, to wait that the length and the inferior low address blank space of buffer address of preserving data compare, the rest may be inferred, waits to preserve the address blank space of data up to searching out enough preservations.
The additional information that management method of the present invention is preserved data comprises: the sign whether data are cleared, this process data initial address and end address in the IR buffer memory.
Management method of the present invention receives behind the data retransmission preserves after data with this process decoding error of preserving merge again, and distributes the preservation position of these data in the IR buffer memory according to the identification information of data retransmission.
IR cache management device of the present invention (abbreviating the IR cache manager as) comprises IR cache controller and interface module, the IR cache controller comprises main control unit again and reads, writes control sub unit that the IR cache controller is connected with primary processor by interface module.
Be provided with additional information registers group (abbreviating the additional information register as) and Data Identification information register group (abbreviating the identification information register as) in the IR cache manager interface module of the present invention, the additional information register has 8 storage arrays, be respectively applied for and preserve the additional information that 8 processes need be preserved data, the identification information register is used to preserve the identification information of data.
Description of drawings:
Fig. 1 is the structural representation of the HARQ data processing equipment of prior art
Fig. 2 is a management method IR cache management schematic process flow diagram of the present invention
Fig. 3 is the structural representation of management method IR cache management device of the present invention
Below in conjunction with accompanying drawing management method of the present invention and device thereof are further described.
Fig. 1 is the structural representation of the HARQ data processing equipment of prior art.As seen from the figure, for the maximum number of processes of corresponding HARQ instance technology 8 characteristics, prior art is divided into the memory space equal and opposite in direction with IR buffer memory design, and memory space is not less than 8 independent cache blocks of individual process required storage, by process number the cache blocks of each process is selected.Though such design can not exist certain process to IR buffer memory demand quantitative change cover the situation of other process data greatly,, the IR buffer memory total amount stipulated in the standard of the summation of the required storage of Que Dinging thus.
Fig. 2 is a management method IR cache management schematic process flow diagram of the present invention.As seen from the figure, when adopting management method of the present invention that multi-process HARQ technology IR buffer memory is managed, comprise following key step:
Step 3, from supplemental information store, read the sign whether this process data is cleared according to process number, if this is designated " emptying ", then pass data headed by the expression reception data, execution in step 4, if this is designated " storing ", then expression reception data are data retransmission, execution in step 6;
Step 4, according to the first preservation position that passes data of identification information and IR buffer address order assignment from low to high, preserve first data and the additional information (additional information comprises sign, initial address and the end address of this process data in the IR buffer memory whether data are cleared) thereof of passing, the sign whether data in the supplemental information store are cleared is changed to " storing ";
Step 5, head is passed data decode, as ack signal is just sent in the success of decoding, the notice transmitting terminal is decoded successfully, decoding this time finishes, empty these data and preserve the IR spatial cache of position, the sign whether data in the supplemental information store are cleared is changed to " emptying ", and transmitting terminal sends new data, execution in step 1; Otherwise UE sends the NACK signal, notice transmitting terminal decoding error, execution in step 10;
Step 6, read the additional information of these process decoding error data from supplemental information store, determine the memory location of the decoding error data of preserving according to the process number of these data;
Step 9, be combined data and decode, as ack signal is just sent in the success of decoding, the notice transmitting terminal is decoded successfully, decoding this time finishes, empty these data and preserve the IR spatial cache of position, the sign whether data in the supplemental information store are cleared is changed to " emptying ", and transmitting terminal sends new data, execution in step 1; Otherwise UE sends the NACK signal, notice transmitting terminal decoding error;
Step 10, according to the identification information of data and the preservation position of IR buffer address order assignment decoding error data from low to high;
Step 11, preservation decoding error data, preserve additional information simultaneously, additional information comprises: the sign whether data are cleared, this process data initial address and end address in the IR buffer memory, the sign whether data in the supplemental information store are cleared is changed to " storing ", execution in step 1;
Step 12, this HARQ data processing that finishes.
Said process only is the description to a process, and the data processing of a plurality of processes is mutual intersections, repeats in actual applications.Usually, processes such as the reception of a certain process data, sign indicating number merging, preservation, decoding are in sequence, even receive the data of other processes during this period, also only can preserve, and can not interrupt the data processing of aforementioned process.
Fig. 3 is the structural representation of management method IR cache management device of the present invention.As seen from the figure, IR cache management device of the present invention (abbreviating the IR cache manager as) comprises IR cache controller and interface module, the IR cache controller comprises main control unit again and reads, writes control sub unit that the IR cache controller is connected with primary processor by interface module.In the interface module of IR cache manager, be provided with additional information register and identification information register, the additional information register has 8 storage arrays, be respectively applied for and preserve the additional information that 8 processes need be preserved data, the identification information register is used to preserve the identification information of data.
The inventive method also can have other various embodiments; without departing from the spirit and substance of the case in the method for the present invention; those skilled in the art work as can make various corresponding changes or distortion according to the inventive method, but these corresponding changes or distortion all belong to the claim protection range of the inventive method.
Claims (3)
1. the management method of the multi-process hybrid automatic repeat request technology HARQ of a TD-SCDMA system virtual technology buffer memory IR, it is characterized in that: according to the identification information of waiting to preserve data, wait to preserve the preservation position of data in virtual cache IR according to virtual cache IR address order assignment from low to high, preserve the additional information of these data simultaneously, read this data according to the additional information of preserving data, this method comprises following key step:
Step 1, user terminal UE receive data, obtain process number, number of retransmissions and the data length identification information of these data from the system information of these data;
Step 2, whether reach maximum retransmission, as do not reach according to the identification information judgment of these data, execution in step 3, as reaching maximum retransmission, then execution in step 12;
Step 3, from supplemental information store, read the sign whether this process data is cleared according to process number, if this is designated " emptying ", then pass data headed by the expression reception data, execution in step 4, if this is designated " storing ", then expression reception data are data retransmission, execution in step 6;
Step 4, according to the first preservation position that passes data of identification information and virtual cache IR address order assignment from low to high, preserve first data and the additional information thereof of passing, the sign whether data in the supplemental information store are cleared is changed to " storing ";
Step 5, head is passed data decode, as ack signal is just sent in the success of decoding, the notice transmitting terminal is decoded successfully, decoding this time finishes, empty these data and preserve the virtual cache IR space of position, the sign whether data in the supplemental information store are cleared is changed to " emptying ", and transmitting terminal sends new data, execution in step 1; Otherwise user terminal UE sends the NACK signal, notice transmitting terminal decoding error, execution in step 10;
Step 6, read the additional information of these process decoding error data from supplemental information store, determine the memory location of the decoding error data of preserving according to the process number of these data;
Step 7, read these process decoding error data and merge with data retransmission, the sign whether data of supplemental information store are cleared is changed to " emptying " simultaneously, according to the preservation position of the identification information and the virtual cache IR address order assignment merging data from low to high of data retransmission;
Step 8, preservation merging data are preserved additional information simultaneously, and additional information comprises: the sign whether data are cleared, these data initial address and end address in virtual cache IR;
Step 9, be combined data and decode, as ack signal is just sent in the success of decoding, the notice transmitting terminal is decoded successfully, decoding this time finishes, empty these data and preserve the virtual cache IR space of position, the sign whether data in the supplemental information store are cleared is changed to " emptying ", and transmitting terminal sends new data, execution in step 1; Otherwise user terminal UE sends the NACK signal, notice transmitting terminal decoding error;
Step 10, according to the identification information of data and the preservation position of virtual cache IR address order assignment decoding error data from low to high;
Step 11, preservation decoding error data, preserve additional information simultaneously, additional information comprises: the sign whether data are cleared, these data initial address and end address in virtual cache IR, the sign whether data in the supplemental information store are cleared is changed to " storing ", execution in step 1;
Step 12, this hybrid automatic repeat request technology HARQ data processing that finishes.
2. according to the described management method of claim 1, it is characterized in that: data to be preserved comprise first data and the merging data of passing, and its identification information comprises: the process number of data, number of retransmissions and data length; Wherein, described merging data is meant the data after decoding error data and data retransmission merge.
3. according to the described management method of claim 1, it is characterized in that: wait to preserve the preservation position of data in virtual cache IR according to virtual cache IR address order assignment from low to high, being about to wait to preserve the minimum address blank space of the length of data and buffer address compares, if data to be preserved are enough preserved in the address blank space, then deposit data to be preserved in this address blank space, otherwise, to wait that the length and the inferior low address blank space of buffer address of preserving data compare, the rest may be inferred, waits to preserve the address blank space of data up to searching out enough preservations.
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| CN101572661B (en) * | 2008-04-30 | 2011-09-07 | 电信科学技术研究院 | Methods, device and system for caching data based on time division duplex mode |
| BRPI0925339A2 (en) | 2009-04-27 | 2016-04-26 | Huawei Tech Co Ltd | information processing method, system and equipment |
| CN102065484B (en) * | 2009-11-12 | 2013-07-03 | 中兴通讯股份有限公司 | Data storage method and device for combining hybrid automatic retransmission requests |
| CN102271033B (en) * | 2010-06-04 | 2015-05-13 | 中兴通讯股份有限公司 | Hybrid automatic repeat request memory dynamic scheduling method and device |
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| CN103166747B (en) | 2011-12-14 | 2017-12-29 | 中兴通讯股份有限公司 | The method and device that a kind of HARQ merges |
| CN103905783B (en) * | 2012-12-25 | 2017-09-01 | 杭州海康威视数字技术股份有限公司 | The method and apparatus of decoding display is carried out to video flowing |
| CN104158639A (en) * | 2013-05-14 | 2014-11-19 | 电信科学技术研究院 | Code merging buffer allocation method and device |
| CN105813139B (en) * | 2014-12-30 | 2019-03-15 | 苏州简约纳电子有限公司 | The dynamic management system and method for the data cache region of the multiple Deta bearers of uplink in LTE system |
| JP6455168B2 (en) * | 2015-01-16 | 2019-01-23 | 株式会社デンソー | Memory device system |
| CN107800516B (en) * | 2016-09-01 | 2020-09-25 | 深圳市中兴微电子技术有限公司 | Method and device for high-speed downlink packet access (HSDPA) storage management |
| CN108667572A (en) * | 2017-03-31 | 2018-10-16 | 维沃移动通信有限公司 | A kind of service data transmission method, base station and terminal |
| EP3641179B1 (en) | 2017-06-16 | 2023-10-25 | Beijing Xiaomi Mobile Software Co., Ltd. | Harq feedback method and device, user equipment, and base station |
| CN117539796B (en) * | 2024-01-09 | 2024-05-28 | 深圳宏芯宇电子股份有限公司 | Electronic device and buffer memory management method |
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