CN101106398A - Self-adapted communication control method and system - Google Patents
Self-adapted communication control method and system Download PDFInfo
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- CN101106398A CN101106398A CNA200610099414XA CN200610099414A CN101106398A CN 101106398 A CN101106398 A CN 101106398A CN A200610099414X A CNA200610099414X A CN A200610099414XA CN 200610099414 A CN200610099414 A CN 200610099414A CN 101106398 A CN101106398 A CN 101106398A
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Abstract
The invention discloses a self-adaptive communication control method and a system, which is used to control the system communication by combining the power control and the self-adaptive modulation code. The method comprises the steps that when the transmission error occurs, the system is capable of judging whether the error can be corrected or not; if not, then the system can judge whether the current modulation code grade is the lowest or not. If the current modulation code grade is not the lowest, the system decreases the current modulation grade; while, if the current modulation grade is the lowest, then the system carries out the fast power control. The invention can effectively enhance the system stability and can improve system throughput while maintaining the stability.
Description
Technical field
The present invention relates to the communications field, relate in particular to self-adapted communication control method and system.
Background technology
Adaptive Modulation and Coding (AMC, Adaptive Modulation and Coding) and power control (PC, Power Control) are two kinds of link adaptation techniques commonly used.AMC selects suitable modulating-coding grade (MCS, Modulation Coding Scheme) according to current channel conditions, and with maximum data speed, so AMC is a kind of technology of rate controlled.PC a kind ofly changes transmitted power to satisfy a kind of technology of channel setting index according to current link circuit condition, mainly is used in the middle of the code division multiple access self-interference systems such as (CDMA, Code Division Multiple Access).Its objective is under the prerequisite that guarantees communication quality to reduce transmitted power as far as possible, promptly save power, reduce interference again other travelling carriages.
In practical communication system, because design starting point is different, both use AMC seldom simultaneously with PC.For example in CDMA2000, WCDMA, mainly adopt the PC technology, in data communication is the HSDPA agreement of main purpose, then adopted the AMC technology.
Because two kinds of technology separately, can be so that system is more flexible both suitable combinations.Document " R1-051160, UL System Level Performance Evaluation for E-UTRA, Nortel, 3GPP TSG RAN WG1#42bis, San Diego, USA, 10th-14th October, 2005 " in a kind of adaptive power controlling schemes that is applicable to down link has been proposed, both are taken into consideration, promptly avoid unnecessary power dissipation, in the scope of allowing, improved message transmission rate again, made system more flexible.
This scheme has been set a mode switch thresholding, and when carrier-to-noise ratio during greater than this thresholding, some is wasted transmitted power, and system adopts adaptive power control, reduces base-station transmitting-power, makes it keep the minimum transmitted power of keeping current MCS; When carrier-to-noise ratio during less than this thresholding, if system increases the ability of transmitted power in addition, then increase transmitted power, and corresponding definite MCS grade.
But this scheme is not considered the interference between each user, only considered the situation when transmitted power is big, so the channel acute variation does not take into full account the influence of transmission when hanging down for up link UE transmitted power, thereby causes the stability of system not high.
Summary of the invention
The technical problem to be solved in the present invention provides self-adapted communication control method and system, is used to improve the stability of system, and improves throughput of system when keeping the stability of a system.
Self-adapted communication control method provided by the invention comprises step: judge whether current transmit power reaches power threshold, if do not reach, whether then judge current modulating-coding grade for the highest,, then increase current modulating-coding grade by slow power control if not for the highest.
Preferably, described power threshold is a maximum available power.
Preferably, described slow power control comprises step: setting power control speed; In the unit interval, increase the performance number of described speed.
Self-adapted communication control method provided by the invention, when error of transmission occurring, comprise step: judging whether can error correction, if can not carry out error correction, judge then whether current modulating-coding grade is minimum, if not minimum, then reduce current modulating-coding grade, if minimum, then carry out fast power control.
Preferably,, judge then whether current modulating-coding grade is the highest if can carry out error correction, if not the highest, then increase current modulating-coding grade by slow power control.
Preferably, judging that whether the highest current modulating-coding grade further comprise step before: judge whether current transmit power reaches power threshold, if not, then carry out the described step of judging that current modulating-coding grade is whether the highest.
Preferably, carrying out further comprising step before the fast power control: judge whether current transmit power reaches power threshold, if not, then carry out fast power control.
Preferably, described error correction adopts h-arq to carry out.
Preferably, described h-arq is in conjunction with the fault-tolerant recovery of repeating transmission and forward error correction automatically, and employing incremental redundancy technology.
Preferably, the described judgement that can not carry out error correction comprises step: judge and whether retransmit number of times greater than threshold value, if be not more than threshold value, then number of times retransmitted in retransmits erroneous data and record, if greater than, then judge and can not carry out error correction.
Adaptive communications control system provided by the invention comprises: transmitter unit and control unit;
Described transmitter unit judges whether current transmit power reaches power threshold,
If do not reach, then continue whether to judge current modulating-coding grade for the highest,
If not for the highest, then control unit increases current modulating-coding grade by slow power control.
Adaptive communications control system provided by the invention comprises: transmitter unit, receiving element and control unit;
When error of transmission took place, if receiving element can error correction, then transmitter unit judged whether current modulating-coding grade is the highest, if not the highest, then control unit increases current modulating-coding grade by slow power control;
If receiving element can not error correction, then transmitter unit judges whether current modulating-coding grade is minimum, if not minimum, then control unit reduces current modulating-coding grade, if minimum, then control unit carries out fast power control.
Above technical scheme as can be seen, the present invention has following advantage:
1) because the present invention mistake occurs in system transmissions, and in the time of can't error correction, reduce the modulating-coding grade earlier, drop to and promote transmitting power by fast power control again after minimum, so in terms of existing technologies, the present invention has reduced the probability of call drop when deep fade appears in link, thereby has improved the stability of system's operation;
Increase transmitting power by slow power control when 2) normally moving in system, improved channel quality, thereby improved the modulating-coding grade, so improved throughput of system owing to the present invention;
3) because the present invention had both considered the Control on Communication under system's normal operation, considered the Control on Communication that occurs under the error of transmission situation again, so improved versatility of the present invention.
Description of drawings
Fig. 1 is the inventive method first embodiment flow chart;
Fig. 2 is the inventive method second embodiment flow chart;
Fig. 3 is the inventive method the 3rd embodiment flow chart;
Fig. 4 is the inventive method the 4th embodiment flow chart;
Fig. 5 is the inventive method the 5th embodiment flow chart;
Fig. 6 is the system of the present invention first embodiment schematic diagram;
Fig. 7 is the system of the present invention second embodiment schematic diagram.
Embodiment
The invention provides self-adapted communication control method and system, be used for improving the stability of communication process system, and the throughput that when guaranteeing the stability of a system, improves system.
The present invention is applicable to up link, and the present invention is bad at channel quality, and channel conditions is not enough to make introduces power control techniques when transmitting terminal increases MCS, and the system that makes guarantees system stability, increases throughput of system simultaneously as far as possible.When acutely exceeding the MCS rate range, channel variation can reduce the probability of conversation loss, simultaneously can also be under the prerequisite that guarantees system stability, and more Zhu Dong switching MCS state makes full use of channel conditions and increases throughput of system.
MCS grade used in the present invention is as shown in the table, and the narration of this specification back is all carried out according to following table:
Table 1
| MCS | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Modulation | QPSK | QPSK | QPSK | QPSK | QPSK | 16QAM | 16QAM |
| Code rate | 1/3 | 1/2 | 2/3 | 3/4 | 4/5 | 1/2 | 2/3 |
Below the inventive method is described in detail:
See also Fig. 1, the inventive method first embodiment comprises:
P1) beginning;
Wherein, present embodiment represents that system is in normal communication state, does not promptly occur the deep fade of transfer of data as yet.
P2) judge whether to reach power threshold, in the present invention, this power threshold is a maximum available power, also can set different power threshold according to different system requirements, if, execution in step P3 then), if not, execution in step P4 then);
P3) keep;
Wherein, keep current MCS grade.
P4) whether judge the MCS grade for the highest, if, execution in step P3 then), if not, execution in step P5 then); The highest MCS grade described in the present invention is meant the MCS of highest ranking available in system.
P5) slow power control;
Wherein, power control speed is V
1, and carry out power according to this speed and control, in the present embodiment for increasing power.
P6) improve the MCS grade.
What present embodiment was described is to pass through fully to improve power with the raising channel quality when system's proper communication, thereby promotes the MCS grade, finally improves throughput of system.
Travelling carriage for when guaranteeing the stability of a system, improves throughput of system during with MCS-k (non-maximum MCS state) hierarchical communication as much as possible, and system judges whether transmitting terminal reaches the maximum available power transmission, if do not have, then with speed V
1Improve power, until NextState MCS-k+1.Simultaneously, slower power control speed V
1Also avoid the MCS state to switch too frequent and influence the stability of a system, the system that guaranteed is in metastable state.
When mistake appears in system communication, deep fade promptly appears, just need carry out fast power control for the stability that guarantees system communication when causing the channel status acute variation:
See also Fig. 2, the inventive method second embodiment comprises:
Q1) beginning;
Wherein, error of transmission appears in expression herein, and this mistake is a deep fade, or other errors of transmission that communication is impacted.
Q2) judge whether to carry out error correction, if, execution in step Q3 then), if not, execution in step Q4 then);
Q3) keep current MCS grade constant;
Q4) judge whether current MCS grade is minimum, if, execution in step Q6 then), if not, execution in step Q5 then); Minimum MCS grade described in the present invention is meant the MCS of the lowest class available in system.
Q5) reduce current MCS grade;
Q6) judge whether to reach maximum power, if, execution in step Q7 then), if not, execution in step Q8 then);
Q7) call drop;
Q8) fast power control.
Wherein, power control speed is V
2, and carry out power according to this speed and control, herein for increasing power.
When the travelling carriage channel condition is relatively poor, if run into a deep fade, channel condition worsens rapidly, can't guarantee normal transmission, a large amount of mistakes occur, even adopt h-arq (HARQ, HybridAutomatic Repeat reQuest) technology also can't error correction, so just need increase the transmitting power of travelling carriage in the power bracket of allowing, make channel condition be improved, communication can continue to keep.
If the deep fade of channel long period causes transmitting the wrong frame of continuous appearance, and retransmit and also can't correct a mistake, judge whether current MCS grade is minimum this moment, if not minimumly then downgrade, if minimumly then judge whether to have arrived maximum transmit power, if transmitting terminal do not reach maximum available transmit power, then transmitting terminal in permissible range with speed V
2Increase transmitted power fast, improve channel quality, be maintained to guarantee communication; If transmitting terminal reached maximum transmit power, promptly transmitting terminal can't increase power, and link can't improve in the long period, then the travelling carriage call drop.
In above-mentioned two kinds of situations, V
2Greater than V
1
See also Fig. 3, the inventive method the 3rd embodiment comprises:
R1) beginning;
Wherein, be error of transmission to occur in the present embodiment, this mistake is a deep fade, or other errors of transmission that communication is impacted.
R2) judge whether to carry out error correction, if, execution in step R3 then), if not, execution in step R7 then);
R3) whether judge current MCS grade for the highest, if, execution in step R4 then), if not, execution in step R5 then);
R4) keep;
Wherein, keep current MCS grade.
R5) slow power control;
Wherein, power control speed is V
1, and carry out power according to this speed and control, in the present embodiment for increasing power.
R6) improve current MCS grade;
R7) judge whether current MCS grade is minimum, if, execution in step R9 then), if not, execution in step R8 then);
R8) reduce current MCS grade;
R9) carry out fast power control.
Wherein, power control speed is V
2, and carry out power according to this speed and control, in the present embodiment for increasing power.
Present embodiment combines the situation of front, has proposed two kinds of settling modes when running into error of transmission, distinguishes by whether carrying out error correction.
See also Fig. 4, the inventive method the 4th embodiment comprises:
S1) beginning;
Wherein, be error of transmission to occur in the present embodiment, this mistake is a deep fade, or other errors of transmission that communication is impacted.
S2) judge whether to carry out error correction, if, execution in step S3 then), if not, execution in step S8 then);
S3) judge whether to reach maximum power, if, execution in step S5 then), if not, execution in step S4 then);
S4) judge whether current MCS grade is the highest, if, execution in step S5 then), if not, execution in step S6 then);
S5) keep;
Wherein, keep current MCS grade.
S6) slow power control;
Wherein, power control speed is V
1, and carry out power according to this speed and control, in the present embodiment for increasing power.
S7) upgrade;
Wherein, improve current MCS grade.
S8) judge whether current MCS grade is minimum, if, execution in step S10 then), if not, execution in step S9 then);
S9) downgrade;
Wherein, reduce current MCS grade.
S10) judge whether to reach maximum power, if, execution in step S12 then), if not, execution in step S11 then);
S11) fast power control;
Wherein, power control speed is V
2, and carry out power according to this speed and control, in the present embodiment for increasing power.
S12) call drop.
Present embodiment has increased the judgement to maximum power, can allow system have more practicality, can avoid unnecessary signaling consumption.
See also Fig. 5, the inventive method the 5th embodiment comprises:
T1) beginning;
Wherein, being meant in the present embodiment to run into error of transmission, can be that deep fade also can be other errors of transmission, so long as to all can that communication impacts.
T2) retransmission data;
Wherein, retransmits erroneous data.
T3) judge to retransmit number of times and whether surpass threshold value, if, execution in step T9 then), if not, execution in step T4 then);
T4) judge whether to reach maximum power, if, execution in step T6 then), if not, execution in step T5 then);
T5) judge whether current MCS grade is the highest, if, execution in step T6 then), if not, execution in step T7 then);
T6) keep;
Wherein, keep current MCS grade.
T7) slow power control;
Wherein, power control speed is V
1, and carry out power according to this speed and control, in the present embodiment for increasing power.
T8) upgrade;
Wherein, improve current MCS grade.
T9) judge whether current MCS grade is minimum, if, execution in step T11 then), if not, execution in step T10 then);
T10) downgrade;
Wherein, reduce current MCS grade.
T11) judge whether to reach maximum power, if, execution in step T13 then), if not, execution in step T12 then);
T12) fast power control;
Wherein, power control speed is V
2, and carry out power according to this speed and control, in the present embodiment for increasing power.
T13) call drop.
Suppose that travelling carriage constantly communicates by letter with MCS-k, when system runs into the continuous mistake of deep fade appearance, also can't correct a mistake (reaching maximum number of retransmissions) by retransmitting, this moment, elder generation judged whether current be minimum MCS state, be MCS-1, if not then reduce the MCS state; , transmitting terminal judges whether transmitting terminal has reached maximum transmit power, has reached maximum transmit power as transmitting terminal, does not improve link-quality at the appointed time, and travelling carriage is with call drop if being in MCS-1; Do not arrive maximum transmit power as transmitting terminal, then triggering speed is V
2The fast power control model, system increases transmitted power, improves link-quality, makes communication be maintained.Relative, if link is better relatively, retransmit the mistake that can correct in the transmission by HARQ, judge then whether transmitting terminal arrives maximum transmit power, if arrive, then keep this MCS state; If the power of transmitting terminal can also increase, then system is with a lower speed V
1Carry out slow power control, antagonism path loss and shadow fading improve the MCS state grade when MCS does not reach highest ranking, utilize channel conditions to increase throughput of system more fully.
Below system of the present invention is described in detail:
See also Fig. 6, system of the present invention first example structure comprises: transmitter unit 100 and control unit 200;
If do not reach, then transmitter unit 100 continues whether to judge current modulating-coding grade for the highest,
If not for the highest, then control unit 200 increases current modulating-coding grade by slow power control.
See also Fig. 7, system of the present invention second example structure comprises: transmitter unit 100, receiving element 300 and control unit 200;
When error of transmission took place, if receiving element 300 can error correction, then transmitter unit 100 judged whether current modulating-coding grade is the highest, if not the highest, then control unit 200 is by the current modulating-coding grade of slow power control increase;
If receiving element 300 can not error correction, then transmitter unit 100 judges whether current modulating-coding grade is minimum, if not minimum, then control unit 200 reduces current modulating-coding grade, if minimum, then control unit 200 carries out fast power and controls.
More than self-adapted communication control method provided by the present invention and system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. a self-adapted communication control method is characterized in that, comprises step:
Judge whether current transmit power reaches power threshold,
If do not reach, whether then judge current modulating-coding grade for the highest,
If not for the highest, then increase current modulating-coding grade by slow power control.
2. self-adapted communication control method according to claim 1 is characterized in that, described power threshold is a maximum available power.
3. self-adapted communication control method according to claim 1 and 2 is characterized in that, described slow power control comprises step:
Setting power control speed;
In the unit interval, increase the performance number of described speed.
4. a self-adapted communication control method is characterized in that, when error of transmission occurring, comprises step:
Judging whether can error correction,
If can not carry out error correction, judge then whether current modulating-coding grade is minimum,
If not minimum, then reduce current modulating-coding grade, if minimum, then carry out fast power control.
5. self-adapted communication control method according to claim 4 is characterized in that,
If can carry out error correction, judge then whether current modulating-coding grade is the highest,
If not the highest, then increase current modulating-coding grade by slow power control.
6. self-adapted communication control method according to claim 5 is characterized in that, is judging that whether the highest current modulating-coding grade further comprise step before:
Judge whether current transmit power reaches power threshold, if not, then carry out the described step of judging that current modulating-coding grade is whether the highest.
7. according to each described self-adapted communication control method in the claim 4 to 6, it is characterized in that, before carrying out fast power control, further comprise step:
Judge whether current transmit power reaches power threshold, if not, then carry out fast power control.
8. according to each described self-adapted communication control method in the claim 4 to 6, it is characterized in that described error correction adopts h-arq to carry out.
9. self-adapted communication control method according to claim 8 is characterized in that, described h-arq is in conjunction with the fault-tolerant recovery of repeating transmission and forward error correction automatically, and employing incremental redundancy technology.
10. according to each described self-adapted communication control method in the claim 4 to 6, it is characterized in that the described judgement that can not carry out error correction comprises step:
Judge and whether retransmit number of times greater than threshold value,
If be not more than threshold value, then number of times retransmitted in retransmits erroneous data and record,
If greater than, then judge and can not carry out error correction.
11. an adaptive communications control system is characterized in that, comprising: transmitter unit and control unit;
Described transmitter unit judges whether current transmit power reaches power threshold,
If do not reach, then continue whether to judge current modulating-coding grade for the highest,
If not for the highest, then control unit increases current modulating-coding grade by slow power control.
12. an adaptive communications control system is characterized in that, comprising: transmitter unit, receiving element and control unit;
When error of transmission took place, if receiving element can error correction, then transmitter unit judged whether current modulating-coding grade is the highest, if not the highest, then control unit increases current modulating-coding grade by slow power control;
If receiving element can not error correction, then transmitter unit judges whether current modulating-coding grade is minimum, if not minimum, then control unit reduces current modulating-coding grade, if minimum, then control unit carries out fast power control.
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| CNA200610099414XA CN101106398A (en) | 2006-07-14 | 2006-07-14 | Self-adapted communication control method and system |
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| CNA200610099414XA CN101106398A (en) | 2006-07-14 | 2006-07-14 | Self-adapted communication control method and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167596A (en) * | 2011-12-16 | 2013-06-19 | 中兴通讯股份有限公司 | Method and device of power control |
| CN106374974A (en) * | 2015-07-24 | 2017-02-01 | 国家电网公司 | Method and device for adaptively adjusting power line carrier communication frame length |
| WO2022078205A1 (en) * | 2020-10-16 | 2022-04-21 | 大唐移动通信设备有限公司 | Power control method, network device, terminal, apparatus, and storage medium |
-
2006
- 2006-07-14 CN CNA200610099414XA patent/CN101106398A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167596A (en) * | 2011-12-16 | 2013-06-19 | 中兴通讯股份有限公司 | Method and device of power control |
| CN103167596B (en) * | 2011-12-16 | 2018-03-30 | 中兴通讯股份有限公司 | The method and device of Power Control |
| CN106374974A (en) * | 2015-07-24 | 2017-02-01 | 国家电网公司 | Method and device for adaptively adjusting power line carrier communication frame length |
| CN106374974B (en) * | 2015-07-24 | 2018-08-17 | 国家电网公司 | A kind of power line carrier communication frame length self-adapting regulation method and device |
| WO2022078205A1 (en) * | 2020-10-16 | 2022-04-21 | 大唐移动通信设备有限公司 | Power control method, network device, terminal, apparatus, and storage medium |
| CN114389743A (en) * | 2020-10-16 | 2022-04-22 | 大唐移动通信设备有限公司 | Power control method, network device, terminal, device and storage medium |
| CN114389743B (en) * | 2020-10-16 | 2023-12-26 | 大唐移动通信设备有限公司 | Power control method, network equipment, terminal, device and storage medium |
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