CN101094164B - Method for controlling block error ratio in mobile communication system - Google Patents
Method for controlling block error ratio in mobile communication system Download PDFInfo
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- CN101094164B CN101094164B CN200610086962A CN200610086962A CN101094164B CN 101094164 B CN101094164 B CN 101094164B CN 200610086962 A CN200610086962 A CN 200610086962A CN 200610086962 A CN200610086962 A CN 200610086962A CN 101094164 B CN101094164 B CN 101094164B
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Abstract
The invention is used for solving the issue that is the currently-used technology can't control the block-missing rate so as to cause low throughout. It comprises: setting up a corresponding table between the initial adjustment value and the block-missing rate, and calculating the block-missing rate at unit time and at a certain times; if the block-missing rate is more than an upper threshold and less than a threshold, then according to the block-missing rate, the code rate is adjusted. By setting up a frequency counter and a timer, the invention ensures the accuracy and real-time statistic of block-missing rate. The invention is mainly used in high speed downlink packet access (HSDPA) system.
Description
Technical field
The present invention relates to the method for control Block Error Rate in a kind of wireless mobile communications field, be meant the method for control Block Error Rate in high speed descending grouping access system especially.
Background technology
In the high speed descending grouping access system (HSDPA), terminal (UE) reporting channel quality indication (CQI) is lower than 10% according to high speed descending sharing channel (HS-DSCH) channel Block Error Rate (BLER) under the current wireless environment and reports, but since UE when reporting CQI error or because the quick variation of channel causes reports constantly and real delivery time channel generation marked change, thereby cause HS-DSCH channel Block Error Rate (BLER) to depart from 10%.If when Block Error Rate was too low, data block transmitted was less, the UE throughput can not maximize; And Block Error Rate is when too high, and the throughput of terminal can descend, and causes cell throughout decline because the too high Node of the causing B of Block Error Rate dispatching efficiency descends simultaneously.But in the prior art, in the HSDPA system, there are not a kind of effective measures the Block Error Rate of UE can be controlled at certain limit, so that UE and sub-district is throughput-maximized.
Summary of the invention
At defective that exists in the prior art and deficiency, purpose of the present invention proposes the method for the control Block Error Rate in a kind of mobile communication system, the HS-DSCH channel Block Error Rate of terminal can be controlled at certain limit, so that UE and cell throughout reach maximization.
In order to achieve the above object, the present invention proposes the method for control Block Error Rate in a kind of moving communicating field, comprising:
(1) mapping table of a preliminary adjustment value and the error rate is set, described preliminary adjustment value is the adjusted value to code check default according to the size of the error rate;
The statistics timer that (2) will be provided with picks up counting;
(3) statistics of error rate, and judge whether statistics number reaches preset value, if then enter step (6), otherwise enter step (4);
(4) whether then to judge the statistics timer, if then enter step (5); Otherwise return step (3);
(5) judge that whether current Block Error Rate is greater than default Upper threshold or less than default Lower Threshold, if then enter step (6); Otherwise return step (2);
(6) redefine the size of transmission block according to current Block Error Rate.
Wherein, described step (6) is specially:
(61) judge whether last adjusted value is 0, if then enter step (62), otherwise enters step (63);
(62) in described mapping table, select corresponding preliminary adjustment value, and, enter step (64) this adjusted value buffer memory according to Block Error Rate;
(63) if Block Error Rate less than Lower Threshold, then increases the preliminary adjustment value of Block Error Rate correspondence, and with amended adjusted value buffer memory again, enters step (64); If Block Error Rate is greater than Upper threshold, then the preliminary adjustment value with the Block Error Rate correspondence reduces, and with amended adjusted value buffer memory again, enters step (64);
(64) according to the adjusted value of buffer memory, redefine the size of transmission block, step finishes.
Wherein, described step (64) is specially:
(641) set up the correspondence table of code check and transmission block size, described correspondence table is consistent with the modulation system and the code channel number of the indication of reporting channel quality;
(642) according to the size of existing transmission block, in above-mentioned correspondence table, search corresponding code rate;
(643) with the adjusted value of existing code check, determine adjusted code check according to described buffer memory;
(644), in above-mentioned correspondence table, search corresponding transmission block size, and redefine the size of transmission block according to adjusted code check.
Wherein, described step (3) is specially:
(31) add up current Block Error Rate;
(32) whenever receive a up feedback information, then statistics number is added 1;
(33) judge whether statistics number reaches preset value,, otherwise enter step (4) if then enter step (6).
The present invention proposes the method for the control Block Error Rate in a kind of mobile communication system, compared with prior art, the present invention is by being provided with statistics number counter, statistics timer, guarantee Block Error Rate statistical accuracy and real-time, it is enough big that the set point of statistics number counter is wanted, to guarantee accuracy; The set point of adding up timer simultaneously again can not be too big, to guarantee real-time.The present invention is mainly used in high speed descending grouping access system, can make the Block Error Rate of all users in the sub-district maintain a target zone, avoids because the too high influence to user and throughput of Block Error Rate can improve the throughput of terminal and sub-district.
Description of drawings
Fig. 1 is the method flow diagram of the control Block Error Rate in the mobile communication system of the present invention;
Fig. 2 is the graph of a relation of Es/N0 and code rate (code check) in the HS-DSCH system;
Fig. 3 is the BLER of CQI 16-18 in the HS-DSCH system and the graph of a relation of Es/N0.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
The method of the control Block Error Rate in the mobile communication system that the present invention proposes comprises as shown in Figure 1:
1, set statistics number counter, statistics timer, Block Error Rate register, adjusted value register, the maximum that the statistics number counter wherein is set is M, and the maximum of statistics timer is N; M, N guarantee BLER statistical accuracy and real-time, and it is enough big that M wants, to guarantee accuracy; N again can not be too big simultaneously, to guarantee real-time; M and N are mutual restriction under the certain situation of number of users; M, N value will be taken all factors into consideration, compromise and choose; Simultaneously, the mapping table of a preliminary adjustment value and the error rate is set, described preliminary adjustment value is the adjusted value to code check default according to the size of the error rate, and this mapping table preferred embodiment is as shown in table 1;
| The Block Error Rate interval | Preliminary adjustment value (code check) |
| Less than Lower Threshold | +0.02 |
| Greater than Lower Threshold, less than Upper threshold | Do not modulate |
| The Block Error Rate interval | Preliminary adjustment value (code check) |
| Greater than Upper threshold～25% | -0.03 |
| 25％～35％ | -0.05 |
| 35％～45％ | -0.06 |
| 45％～55％ | -0.07 |
| 55％～65％ | -0.08 |
| ＞65％ | -0.10 |
Table 1
2,, and will add up timer and pick up counting with statistics number counter, statistics timer, the zero clearing of Block Error Rate register;
3, add 1 according to the mistake block message statistics of error rate that feeds back, and with the count value of statistics number counter;
4, judge whether the statistics number counter reaches M,, otherwise enter step 5 if then enter step 7;
5, judge that whether the statistics timer reaches N, if then enter step 6, otherwise returns step 3;
6, judge that whether current Block Error Rate is greater than default Upper threshold or less than default Lower Threshold, if then enter step 7; Otherwise return step 2;
7, judge whether last adjusted value is 0, if then enter step 8, otherwise enters step 9;
8, in the mapping table of the described preliminary adjustment value and the error rate, select corresponding preliminary adjustment value according to Block Error Rate, and this adjusted value is cached to the adjusted value register, enter step 10;
If 9 Block Error Rates are less than Lower Threshold, be cached to the adjusted value register then with preliminary adjustment value+0.01 of Block Error Rate correspondence, and with amended adjusted value, enter step 10; If Block Error Rate is greater than Upper threshold, be cached to the adjusted value register then with the preliminary adjustment value-0.01 of Block Error Rate correspondence, and with amended adjusted value, enter step 10; Wherein, in this preferred embodiment, the P code check of adjustment gets 0.01, and preliminary adjustment value is relevant with the BLER value, and the BLER value is offset target BLER scope more, and preliminary adjustment value is just big more.P code check value is a unit with 0.01, and its size influences convergence rate, and upwards the timing step-length is smaller, and can be big slightly to downward modulation; Method of adjustment is as shown in table 3,
Table 2
10, set up the correspondence table of code check and transmission block size, as shown in table 3, described correspondence table is consistent with the modulation system and the code channel number of the indication of reporting channel quality; Deposit the code check (transmission block size/physical channel bit number) of all transmission block, modulation system, code channel number and the transmission block consistent in this table with modulation system that reports CQI and code channel number.First row are represented the transmission block size in the following table, and secondary series is represented modulation system (0:QPSK; 1:16QAM), the 3rd row are represented code channel number, and the 4th row are represented code check;
Modulation mode of transmission blocks code channel number code check:
(0:QPSK; 1:16QAM) (transmission block+24CRC)/the physical channel bit number
2279 0 4 0.59
2320 0 4 0.61
2362 0 4 0.62
2404 0 4 0.63
2448 0 4 0.64
2492 0 4 0.65
2537 0 4 0.66
2583 0 4 0.67
2630 0 4 0.69
2677 0 4 0.70
2726 0 4 0.71
Table 2
10, according to the size of existing transmission block, in above-mentioned correspondence table, search corresponding code rate;
11, according to the adjusted value of buffer memory in the adjusted value register, existing code check is adjusted, determined adjusted code check;
12,, in above-mentioned correspondence table, search corresponding transmission block size, and redefine the size of transmission block according to adjusted code check.
For example, the transmission block of the existing CQI correspondence that reports is 2583, and existing as shown in Table 1 code check is 0.67, and adjusting code check is-0.03, and the code check of adjusting the back transmission block so is 0.64, is 2448 so draw corresponding transmission block.
As shown in Figure 2, illustrate that under the situation of identical modulation and code channel number, the Es/N0 of code check and requirement is linear.
The establishing method of preliminary adjustment value can be as shown in Figure 3, figure center line 1 is CQI16-M1-C5-coderate0.373, line 3 is CQI17-M1-C5-coderate0.438, the CQI that line 4 transmits at present for the CQI18-M1-C5-coderate0.488. hypothesis is 16, Block Error Rate drops on the point shown in the black circle, Block Error Rate is 30%. at this moment to want under the prerequisite that does not change power and Block Error Rate can drop to about 10%, so just need to use the transmission block of line 2 curves representative, because the linear relationship of code check and Es/N0, so can roughly calculate the code check of outlet 2 curves. according to simulation result, if BLER is 20%, code check will reduce 0.03 so; If BLER is 30%, code check will reduce 0.05; If BLER is 40%, code check will reduce 0.06; If BLER is 50%, code check will reduce 0.07. in like manner, if BLER less than 5%, code check will reduce 0.02.
Claims (2)
1. the method for the control Block Error Rate in the moving communicating field comprises:
(1) mapping table of a preliminary adjustment value and Block Error Rate is set, described preliminary adjustment value is the adjusted value to code check default according to the size of Block Error Rate;
The statistics timer that (2) will be provided with picks up counting;
(3) statistics of error rate, and judge whether statistics number reaches preset value, if then enter step (6), otherwise enter step (4);
(4) whether then to judge the statistics timer, if then enter step (5); Otherwise return step (3);
(5) judge that whether current Block Error Rate is greater than default Upper threshold or less than default Lower Threshold, if then enter step (6); Otherwise return step (2);
(6) redefine the size of transmission block according to current Block Error Rate;
Wherein, described step (6) is specially:
(61) judge whether last adjusted value is 0, if then enter step (62), otherwise enters step (63);
(62) in described mapping table, select corresponding preliminary adjustment value, and, enter step (64) this adjusted value buffer memory according to Block Error Rate;
(63) if Block Error Rate less than Lower Threshold, then increases the preliminary adjustment value of Block Error Rate correspondence, and with amended adjusted value buffer memory again, enters step (64); If Block Error Rate is greater than Upper threshold, then the preliminary adjustment value with the Block Error Rate correspondence reduces, and with amended adjusted value buffer memory again, enters step (64);
(64) according to the adjusted value of buffer memory, redefine the size of transmission block, step finishes;
Wherein, described step (64) is specially:
(641) set up the correspondence table of code check and transmission block size, described correspondence table is consistent with the modulation system and the code channel number of the indication of reporting channel quality;
(642) according to the size of existing transmission block, in above-mentioned correspondence table, search corresponding code rate;
(643) with the adjusted value of existing code check, determine adjusted code check according to described buffer memory;
(644), in above-mentioned correspondence table, search corresponding transmission block size, and redefine the size of transmission block according to adjusted code check.
2. the method for the control Block Error Rate in the moving communicating field according to claim 1 is characterized in that, described step (3) is specially:
(31) add up current Block Error Rate;
(32) whenever receive a up feedback information, then statistics number is added 1;
(33) judge whether statistics number reaches preset value,, otherwise enter step (4) if then enter step (6).
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| CN101304273B (en) * | 2008-07-09 | 2012-04-11 | 北京天碁科技有限公司 | Method and apparatus for controlling outer ring power |
| CN102457914B (en) * | 2012-01-11 | 2017-11-10 | 中兴通讯股份有限公司 | The transmission method of upstream data and uplink scheduling information, device |
| CN102904670B (en) * | 2012-03-31 | 2015-03-18 | 展讯通信（上海）有限公司 | Device and method for obtaining channel quality indicator, mobile terminal and communication system |
| CN102664714B (en) * | 2012-05-02 | 2016-02-17 | 大唐移动通信设备有限公司 | test data processing method and device |
| CN104518848A (en) * | 2013-10-08 | 2015-04-15 | 中兴通讯股份有限公司 | Method and terminal for controlling single-transmission throughput of HSDPA (high speed downlink package access) data channels |
| US10631181B2 (en) | 2014-01-31 | 2020-04-21 | Nokia Technologies Oy | BLER measurements for MBMS |
| CN108432166A (en) * | 2016-05-11 | 2018-08-21 | 华为技术有限公司 | A kind of method of adjustment and equipment of speech encoding rate |
| CN108738154B (en) * | 2017-04-18 | 2021-09-14 | 中国移动通信有限公司研究院 | Scheduling method and device |
| WO2019080097A1 (en) * | 2017-10-27 | 2019-05-02 | Hewlett Packard Enterprise Development Lp | Adjusting data rates in wireless networks |
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| CN2655569Y (en) * | 2002-09-24 | 2004-11-10 | 交互数字技术公司 | Block error score estimating report of target signal interference rate regulating |
| US20050239490A1 (en) * | 2004-04-12 | 2005-10-27 | Nec Corporation | Radio communication terminal and transmission power control method |
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| CN2655569Y (en) * | 2002-09-24 | 2004-11-10 | 交互数字技术公司 | Block error score estimating report of target signal interference rate regulating |
| US20050239490A1 (en) * | 2004-04-12 | 2005-10-27 | Nec Corporation | Radio communication terminal and transmission power control method |
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