CN105978640B - A kind of modulating-coding threshold value dynamic decision method in microwave transmission network - Google Patents
A kind of modulating-coding threshold value dynamic decision method in microwave transmission network Download PDFInfo
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- CN105978640B CN105978640B CN201610223209.3A CN201610223209A CN105978640B CN 105978640 B CN105978640 B CN 105978640B CN 201610223209 A CN201610223209 A CN 201610223209A CN 105978640 B CN105978640 B CN 105978640B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention discloses in a kind of microwave transmission network, the method that dynamic adjusts multi-user's modulating-coding threshold value, this method comprises: setting the unified initial modulation coding threshold value of each user；Signal-to-noise ratio, field strength and the bit error rate fed back to according to networked users is recorded respectively, signal-to-noise ratio fluctuation range, the field strength fluctuation range, the bit error rate in measurement window are counted by weight formula simultaneously, then according to environment increment weight formula X=α * M+ β * N+ γ * Q, environment increment is calculated, environment increment is finally added on the basis of initial modulation encodes threshold value as current modulating-coding threshold value.The method solves the problems, such as that modulating-coding threshold value can not carry out dynamic decision for each accessing user, user is avoided in the environment of acute variation, because modulating-coding threshold value be not suitable for and caused by modulating-coding fluctuate back and forth, the bit error rate raising the phenomenon that.
Description
Technical field
The present invention relates to a kind of decisions of modulating-coding threshold value in wireless communication field more particularly to microwave transmission network
Method.
Background technique
With the rapid development of wireless communication technique, microwave transport equipment is widely applied to military, civilian every field.
But in microwave current transmission network, modulating-coding threshold value is often initially being set, while can not be for each access
User carries out dynamic decision, often leads to that certain customers' modulating-coding threshold value in the environment of acute variation is improper to be caused to adjust
System coding fluctuates back and forth, and the bit error rate increases.
Therefore the characteristics of needing one kind in microwave transmission network for transmission channel carries out dynamic adjustment user's threshold value
Method, the method is able to solve above-mentioned relevant issues.
Summary of the invention
The object of the present invention is to provide one kind in microwave transmission network, and dynamic adjusts multi-user's modulating-coding threshold value
Method avoids in the environment of acute variation since the improper caused bit error rate of threshold value rises.
The present invention proposes a kind of decision-making technique of modulating-coding threshold value in microwave transmission network, including following job step
It is rapid:
Step A: the unified initial modulation coding threshold value of each user is set；
Step B: signal-to-noise ratio, field strength and the bit error rate fed back to according to networked users is recorded respectively, while passing through power
Value formula counts signal-to-noise ratio fluctuation range, field strength fluctuation range, the bit error rate in measurement window, is then weighed according to environment increment
It is worth formula X=α * M+ β * N+ γ * Q, calculates environment increment, finally increases on the basis of initial modulation encodes threshold value plus environment
Amount is as current modulating-coding threshold value；
For the treatment process of step B, comprising the following steps:
Step B1: the channel quality of user is detected；
Step B2: distinguishing the channel quality parameter of user, is handled respectively every kind of channel quality parameter；
Step B3: channel quality parameter signal-to-noise ratio, field strength and the bit error rate that will be distinguished are recorded respectively and is handled respectively；
Step B4: signal-to-noise ratio undulating value M, the total bit error rate N and field strength fluctuation value Q in measurement window are calculated separately out；
Step B5: calculating modulating-coding threshold value increment X by weight formula X=α * M+ β * N+ γ * Q, wherein α, β,
γ is the weight percentage of each judgement foundation respectively, and weight percentage is determined according to the influence to channel quality, influence degree
α value range { 5-10 }, β value range { 25-30 }, γ value are determined according to engineering experience for the bit error rate > signal-to-noise ratio > field strength
Range { 1-3 } can be adjusted in actual use, to improve system communication effect in value range；
Step B6: to initial threshold plus the current decision threshold value after increment X as the user.
Detailed description of the invention
Fig. 1 is the schematic diagram of threshold value decision process.
Specific embodiment
To keep objects and advantages of the present invention clearer, the present invention is made with example with reference to the accompanying drawing further detailed
Explanation.
Fig. 1 is threshold value decision-making mechanism process, this decision process is to be directed to present channel environment pair respectively to each UE
Initial threshold decision value is modified, and increases user for the adaptability of fluctuation environment, which includes:
Step 101: receiving the channel quality feedback information of user；
Step 102: processing being distinguished to channel quality feedback information, is so entered step if it is signal-to-noise ratio parameter
103, if it is the bit error rate, then 104 are entered step, if it is field strength, then entering step 105；
Step 103: the signal-to-noise ratio parameter in measurement window is all recorded；
Step 104: the bit error rate in measurement window is all recorded；
Step 105: the field intensity value in measurement window is all recorded；
Step 106: measurement window signal-to-noise ratio undulating value M is calculated by weight formula；
Step 107: calculating measurement window total bit error rate N；
Step 108: measurement window field strength fluctuation value Q is calculated by weight formula；
Step 109: modulating-coding threshold value increment X is calculated according to weight formula X=α * M+ β * N+ γ * Q, wherein α, β,
γ is the weight percentage of each judgement foundation respectively, and weight percentage is determined according to the influence to channel quality, influence degree
α value range { 5-10 }, β value range { 25-30 }, γ value are determined according to engineering experience for the bit error rate > signal-to-noise ratio > field strength
Range { 1-3 } can be adjusted in actual use, to improve system communication effect in value range；
Step 110: plus increment X as judgement foundation on the basis of initial threshold.
It illustrates how to calculate weight using weight formula and be compared below by an example.System user is current
16QAM1/2 threshold value is signal-to-noise ratio 22db, and field strength range is -30 to -70dbm, and signal-to-noise ratio fluctuation range is 0.5, field strength fluctuation
Range is 0.2, the bit error rate 0.05, and the decision of weight percentage is determined according to the influence to channel quality, be will affect minimum
Field strength fluctuation range weight be set to 1, according to the value range of α, β, γ, in conjunction with practical engineering experience, signal-to-noise ratio is fluctuated into model
It encloses weight and is set to 5, the bit error rate is the most key on channel quality influence, is set to 25, passes through weight formula X=5*0.2+25*
0.05+1*0.2, it is 2.25 that threshold value increment, which is calculated, and then new 16QAM1/2 threshold value is signal-to-noise ratio (22+2.25)
Db, field strength range are that (- 30-2.25) arrives (- 70+2.25) dbm.
In conclusion being not intended to limit the scope of the present invention the above is only preferred embodiments of the invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention
Within the scope of shield.
Claims (1)
1. a kind of modulating-coding threshold value dynamic decision method in microwave transmission network, which is characterized in that set system initial threshold
Value is P0, and different user completes threshold value increment X dynamic decision in measurement window, obtain newest thresholding according to channel conditions
Value P=P0+X changes according to the new threshold value decision modulation coding scheme；Steps are as follows for modulating-coding threshold value dynamic decision:
Step 1: calculating separately out signal-to-noise ratio undulating value M, the total bit error rate N and field strength fluctuation value Q in measurement window；
Step 2: modulating-coding threshold value increment X being calculated by weight formula X=α * M+ β * N+ γ * Q, wherein α, β, γ distinguish
It is the weight percentage of each judgement foundation, weight percentage determines that influence degree is error code according to the influence to channel quality
Rate > signal-to-noise ratio > field strength determines α value range { 5-10 }, β value range { 25-30 }, γ value range according to engineering experience
{ 1-3 } can be adjusted in actual use, to improve system communication effect in value range;
Step 3: according to formula P=P0+X, obtaining newest threshold value, the modulation coding scheme of the user is selected by the new threshold value
It determines；
By the determination of threshold value increment X dynamic decision and newest threshold value P, realize that modulating-coding threshold value is dynamic in Microwave Net
The method of state decision.
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| CN105978640B true CN105978640B (en) | 2019-04-16 |
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| EP1128574A2 (en) * | 2000-02-28 | 2001-08-29 | Lucent Technologies Inc. | Reverse link outer loop power control |
| CN101483501A (en) * | 2009-02-20 | 2009-07-15 | 北京北方烽火科技有限公司 | Method for adaptively regulating modulation encoding mode based on CINR |
| CN102694608A (en) * | 2012-05-22 | 2012-09-26 | 广西师范大学 | Method and device for preferable selection of transmission techniques of transceiving equipment of wireless mobile communication system |
| CN103874109A (en) * | 2012-12-12 | 2014-06-18 | 普天信息技术研究院有限公司 | Adjustment method of channel transmission demodulation threshold |
| CN104426628A (en) * | 2013-08-28 | 2015-03-18 | 普天信息技术有限公司 | Threshold adjusting method and system of modulation coding mode |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128574A2 (en) * | 2000-02-28 | 2001-08-29 | Lucent Technologies Inc. | Reverse link outer loop power control |
| CN101483501A (en) * | 2009-02-20 | 2009-07-15 | 北京北方烽火科技有限公司 | Method for adaptively regulating modulation encoding mode based on CINR |
| CN102694608A (en) * | 2012-05-22 | 2012-09-26 | 广西师范大学 | Method and device for preferable selection of transmission techniques of transceiving equipment of wireless mobile communication system |
| CN103874109A (en) * | 2012-12-12 | 2014-06-18 | 普天信息技术研究院有限公司 | Adjustment method of channel transmission demodulation threshold |
| CN104426628A (en) * | 2013-08-28 | 2015-03-18 | 普天信息技术有限公司 | Threshold adjusting method and system of modulation coding mode |
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