CN1602039A - Method of self-adaptive configuration for ultrahigh bit rate data client line rate - Google Patents
Method of self-adaptive configuration for ultrahigh bit rate data client line rate Download PDFInfo
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- CN1602039A CN1602039A CN 200410073200 CN200410073200A CN1602039A CN 1602039 A CN1602039 A CN 1602039A CN 200410073200 CN200410073200 CN 200410073200 CN 200410073200 A CN200410073200 A CN 200410073200A CN 1602039 A CN1602039 A CN 1602039A
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Abstract
The method includes steps: detecting state of chain, if broken chain, then office end is changed to basic mode corresponding to remote modem; detecting whether chain is built at basic mode; if yes, setting up configuration at office end and remote end to maximum speed rate mode; detecting whether chain is built at mode in speed rte setup; if yes, calculating SNR value at office end and remote end, and comparing with GoodSNR value respectively through looking up table; if the calculated SNR value is in range of GoodSNR value; then, present speed rate is optimal configuration of speed rate; if no, setting up office end and remote end to speed rate mode lower than previous configured mode in one kevel in speed queue. Repeating the said step is till to optimal speed rate mode is built. The method guarantees SNR of line to meet standard requirement.
Description
Technical field
The present invention relates to communication technical field, more particularly, relate in particular to the method for ultrahigh bit rate data client line rate adaptive configuration in a kind of very high bit rate data user system.
Background technology
VDSL (Very High-bit-rate Digital Subscriber Line) is the very high bit rate subscriber's line.In the 300m scope, the VDSL transmission speed can reach 52Mbps; In 1.5 kilometer range, transmission speed generally can reach 16Mbps.In the application of short distance (in 1.5 kilometers), VDSL will replace ADSL becomes access technology of future generation.Because VDSL provides bigger bandwidth, so can satisfy more business demand, comprise transmission hi-fi music and high definition TV, the pure MPEG2 information flow of multichannel, be that real full-service inserts means.In addition, the speed of VDSL and Ethernet speed are very approaching, can be used as the extension of Ethernet fully, constitute " the big Ethernet " of distance more than 1km between the network node, and VDSL is an extraordinary solution that realizes that sub-district LAN inserts.Have reason to believe that the application prospect of VDSL is very bright, can become the another bright spot of DSL technical development.
What the VDSL access device of using adopted basically at present is QAM (QuadratureAmplitude Modulation) quadrature amplitude modulation mode.For example the 10bases nest plate of INFENION company can adopt two rate configuration parameter constellation numbers and interpolation factor are set, and reaches from 1,000,000 to tens symmetry or asymmetrical line speed.The 10bases nest plate provides the VOC (VDSL Operations Channel) that is used for telemanagement passage, the VDSL access device can not only be managed for configuration local side apparatus, and under the prerequisite of subscriber's line link, remote equipment VDSLModem (modulator-demodulator) is managed for configuration.But cause disconnecting owing to the loss variation or during user's conversion connection line, VDSL Modem just can not link according to the speed that sets in advance at subscriber's line, cause user link to be lost and the serious problems of could not get on to the Net.Again because user's loss of link at this time, access server can not be managed for configuration the VDSL Modem of remote subscriber, need the attendant to go to the scene to diagnose maintenance, thereby increased the weight of the maintenance work of VDSL access device, and increased operation cost.There is following problem in existing user rate method of automatic configuration: though the speed of configuration can reach maximum, be best configuration, may cause a large amount of packet losses, thereby influenced the quality of user's online; Simultaneously Pei Zhi time long, can not in the as far as possible short time, make the user link online again.In sum, owing to there is above problem, the VDSL access device is not promoted on a large scale.
Summary of the invention
The object of the invention is, at in the prior art by the caused maintenance issues of fixed rate VDSL link, a kind of method of very high bit rate digital subscriber link rate adaptive configuration is provided, adapt to the automatic adjusting that realizes the VDSL link rate, make speed reach best, solve the surf the Net problem of quality of inconvenience and user of safeguarding.Simultaneously, when the user wishes to use fixed rate configuration (speed is by user's manual configuration), also can stop speed and dispose automatically, turn back to the fixed rate configuration status, satisfy the different demand of user.
The technical scheme that realizes the object of the invention is such:
The VDSL link rate is divided into a plurality of grades descending rate queue by its usable range, select a kind of up-downgoing speed of the easiest foundation link to be combined as a kind of pattern in each grade, that is to say a kind of rate configuration interpolation factor and up-downgoing speed combination of realizing of parameter value such as constellation number by up-downgoing is set of the described pattern of each grade representative.Wherein the highest one grade is the maximum rate pattern that can reach the maximum rate combination.Described VDSL link also can be called for short the basic mode formula a basic rate pattern and set up link, and this pattern is that a kind of speed is lower, but the combination of reliable and stable speed.
During normal the operation, (signal to noise ratio of circuit satisfies standard-required to the VDSL link in the iptimum speed pattern that can reach, network communication services quality height, packet loss not) sets up link down, and when described VDSL link disconnected, the VDSL Modem of its far-end can be made as oneself the basic mode formula automatically in the regular hour, this moment, the local side of VDSL link also can be set to the basic mode formula automatically, and then the VDSL link can revert to the link setup state under the basic mode formula under the chain rupture state.The present invention just is being based on this point, carries out the rate adaptation configuration according to the following steps, and its outstanding substantive distinguishing features and obvious improvement is:
(1) regularly detect Link State, if detect chain rupture, then the local side with described VDSL link changes the basic mode formula corresponding with the far-end modulator-demodulator into;
(2) detect described VDSL link and whether under the basic mode formula, set up link, if link setup, by the VOC channel operation, reduce the resetting time of far-end modulator-demodulator house dog, then in the rate queue the inside, select maximum speed combination, the local side configuration and the far-end configuration of described VDSL link is set to the maximum rate pattern that maximum rate makes up simultaneously;
(3) detect described VDSL link and whether under set rate mode, set up link, if link setup, then from corresponding signal to noise ratio register, extract the base value of signal to noise ratio, employed constellation number during simultaneously according to configured rate, look into the signal to noise ratio parameter table of comparisons, obtain the K value, then according to the computing formula of signal to noise ratio, calculate the SNR (signal to noise ratio) of local side and far-end, with the SNR value that calculates by looking into the signal to noise ratio parameter table of comparisons, with Good SNR value relatively, if the local side of current link and far-end SNR value respectively all in the GoodSNR of local side and far-end value scope, judge that then current speed is best rate configuration; If can not link setup or current speed be not best rate configuration (local side or the far-end SNR value that are current link are distinguished not in the GoodSNR of local side and far-end value scope), then the local side with described VDSL link is configured to the basic mode formula corresponding with the far-end modulator-demodulator;
(4) detect whether link setup under the basic mode formula of described VDSL link, if, then the local side configuration of described VDSL link and far-end configuration are set to simultaneously in rate queue than on once institute's configuration mode hang down one grade rate mode;
(5) repeating said steps (3) (4) is set up best rate mode until described VDSL link under a certain pattern between maximum rate pattern and the minimum-rate pattern.
According to method of the present invention, under described step (2) (4), if described VDSL link is failed link setup under the basic mode formula, represent that then link also can't set up link under the basic mode formula, may be because the modulator-demodulator of remote subscriber is not opened or link decreases disconnected fully, need artificial the intervention this moment, further processing is not done by system.
During normal operation, described VDSL link is configured to the rate mode of the best that can reach.
Described detection Link State, further comprise: judge at first whether the self adaptation state when front port is that the rate adaptation configuration is carried out in requirement, judge then whether the rate adaptation configuration status when front port is to have carried out the rate adaptation configuration, if for requiring to carry out the state of rate adaptation configuration, current port speed adaptive configuration state is not the state that has carried out the rate adaptation configuration simultaneously, then carries out the rate adaptation configuration process.
Described autosensing state is provided with as required by the user.
Described port speed adaptive configuration state, its initial value can be provided with as required by the user.
After setting up best rate mode, the rate adaptation configuration status of working as front port has been set to carry out the state of rate adaptation configuration.
In the VDSL link, adopt method of the present invention compared with prior art, can detect and dispose automatically the speed of VDSL link automatically, making described VDSL link set up best speed under a certain pattern between maximum rate pattern and the minimum-rate pattern links, reach the requirement of network configuration, reduced setup time, improve the flexibility and the reliability of system, guaranteed that simultaneously the signal to noise ratio of circuit satisfies standard-required, had the high characteristics of network communication services quality.If when at this moment the user wishes to use the fixed rate configuration, also can stop speed and dispose automatically, turn back to the fixed rate configuration status, satisfy the different demand of user.
Description of drawings
Fig. 1 is the flow chart 1 of rate adaptation configuration;
Fig. 2 is the flow chart 2 of rate adaptation configuration.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and specific embodiment.
In a preferred embodiment of the present invention, with the VDSL link rate by the speed range of its support descending be divided into n shelves rate queue rate[0]～rate[n-1], promptly be exactly n kind rate mode.The maximum rate that nest plate is supported is the highest rate mode rate[0], and the basic mode formula is minimum rate mode rate[n-1], promptly pattern 1; Pattern rate[i] height mode rate[0 serves as reasons] to minimum speed limit pattern rate[n-1] and between a pattern.
By the user autosensing state flag bit is set as required; The autosensing state flag bit is 0, and expression does not allow to carry out the rate adaptation configuration; The autosensing state flag bit is 1, and expression allows to carry out the rate adaptation configuration;
Port speed adaptive configuration state flag bit is 0, and the state of rate adaptation configuration has been carried out in expression, and port speed adaptive configuration state flag bit is 1, and the state of rate adaptation configuration is not carried out in expression; Initial value can be provided with as required by the user.
During normal the operation, VDSL is link setup under the rate mode of the best; And when the chain rupture of VDSL link, its far-end modulator-demodulator can oneself be set to pattern 1, and this moment, the local side of VDSL link also was set to pattern 1, and then the VDSL link can revert to the link setup state 1 time in fundamental mode under the chain rupture state.The present invention just is being based on this point and is carrying out rate adaptation configuration, and as shown in Figure 1, concrete steps are as follows:
Step 1: regularly detect the autosensing state flag bit when front port, purpose is to judge whether work as front port allows the rate adaptation configuration;
Step 2:, then turn back to step 1 if the autosensing state flag bit is 0; Otherwise,, then judge port speed adaptive configuration state flag bit at 1 o'clock if the autosensing state flag bit is;
Step 3: if port speed adaptive configuration state flag bit is 0, promptly carried out the state of rate adaptation configuration, then execution in step 5; If port speed adaptive configuration state flag bit is 1, promptly do not carry out the state of rate adaptation configuration, then execution in step 4;
Step 4: referring to Fig. 2, rate adaptation configuration detailed process is as follows:
Step 4-1: detect Link State,, then turn back to step 5 if detect chain rupture;
Step 4-2:, reduce the resetting time of remote equipment house dog by the VOC passage;
Step 4-3: from rate queue rate[i] the inside, descending selection speed combination, promptly select rate[0 successively], rate[1] ... rate[n-1], the configuration of the local side of described VDSL link and far-end disposed be set to rate[0 simultaneously], rate[1] ... rate[n-1] rate mode;
Step 4-4: get the signal to noise ratio base value in the signal to noise ratio register of corresponding port, employed constellation number during simultaneously according to configured rate is looked into the signal to noise ratio parameter table of comparisons, obtains the K value, then according to the computing formula of signal to noise ratio: SNR=k-10 * log
10Hex 2 Dec{SNRCON[23-0] } }, wherein
SNRCON[23-0]: 24 values that the signal to noise ratio register is interior, this value is 16 systems;
Hex 2 Dec: expression is converted into 16 systems the computing of 10 systems;
K: the real number factor;
SNR: the value of signal to noise ratio, unit is dB;
Calculate the SNR (signal to noise ratio) of local side and far-end, with the SNR value by looking into the signal to noise ratio parameter table of comparisons, compare with the GoodSNR value, judge whether the local side of current link and far-end SNR value are the GoodSNR value of local side and far-end, judge promptly whether current speed is best rate configuration;
Table: the signal to noise ratio parameter table of comparisons
| The constellation number | The K value | Good SNR value |
| ?QAM256 | ?91.8 | ＞37db |
| ?QAM128 | ?88.4 | ＞34db |
| ?QAM64 | ?85.5 | ＞31db |
| ?QAM32 | ?79.8 | ＞28db |
| ?QAM16 | ?79.2 | ＞25db |
| ?QAM8 | ?76 | ＞22db |
| ?QAM4 | ?70.2 | ＞15dB |
Step 4-5: if current speed is not best rate configuration, then the local side with described VDSL link is configured to the basic mode formula corresponding with the far-end modulator-demodulator, returns step 4-3 then;
Step 4-6: at this moment, current speed is best rate configuration, and it is 0 that port speed adaptive configuration state flag bit is set, and turns back to step 5;
Step 5: detect Link State,, then turn back to step 1 if detect link setup;
Step 6: the local side of described VDSL link is configured to the basic mode formula corresponding with the far-end modulator-demodulator,, then gets back to step 8 if there is not link setup;
Step 7: it is 1 that port speed adaptive configuration state flag bit is set, and does not promptly carry out the rate adaptation configuration, gets back to step 4 then;
Step 8: express possibility because the modulator-demodulator of remote subscriber is not opened or link decreases disconnectedly fully, need artificial the intervention this moment, system does not process.
Utilize method of the present invention, when the chain rupture of VDSL link, can be by detecting also the speed of configuration VDSL link automatically automatically, making described VDSL link set up best speed under a certain pattern between maximum rate pattern and the minimum-rate pattern links, guarantee the network communication services quality, improved the flexibility and the reliability of system, make system easy to use simultaneously, alleviate maintenance work greatly, reduced maintenance cost.
Claims (7)
1, a kind of method of ultrahigh bit rate data client line rate adaptive configuration, it is characterized in that, the VDSL link rate is divided into descending a plurality of shelves by its usable range, a kind of rate configuration interpolation factor and up-downgoing speed combination of realizing of parameter value such as constellation number by setting up-downgoing of the described pattern of each grade representative, during operation, carry out speed according to the following steps and dispose automatically:
(1) regularly detect Link State, if detect chain rupture, then the local side with described VDSL link changes the basic mode formula corresponding with the far-end modulator-demodulator into;
(2) detect described VDSL link and whether under the basic mode formula, set up link, if link setup, by the VOC channel operation, reduce the resetting time of far-end modulator-demodulator house dog, then in the rate queue the inside, select maximum speed combination, the local side configuration and the far-end configuration of described VDSL link is set to the maximum rate pattern that maximum speed makes up simultaneously;
(3) detect described VDSL link and whether under set rate mode, set up link, if link setup, from corresponding signal to noise ratio register, extract the base value of signal to noise ratio, employed constellation number during simultaneously according to configured rate, look into the signal to noise ratio parameter table of comparisons, obtain the K value, according to the snr computation formula, calculate the SNR value of local side and far-end, with the SNR value that calculates by looking into the signal to noise ratio parameter table of comparisons, compare with Good SNR value, if the local side of current link and far-end SNR value are respectively all in the GoodSNR of local side and far-end value scope, judge that then current speed is best rate configuration, if can not link setup or current speed be not best rate configuration, then the local side with described VDSL link is configured to the basic mode formula corresponding with the far-end modulator-demodulator;
(4) detect whether link setup under the basic mode formula of described VDSL link, if, then the local side configuration of described VDSL link and far-end configuration are set to simultaneously in rate queue than on once institute's configuration mode hang down one grade rate mode;
(5) repeating said steps (3) (4) is set up best rate mode until described VDSL link under a certain pattern between maximum rate pattern and the minimum-rate pattern.
2, the method of a kind of ultrahigh bit rate data client line rate adaptive configuration according to claim 1, it is characterized in that, when detecting Link State, further comprise: judge at first whether the self adaptation state when front port is that the rate adaptation configuration is carried out in requirement, judge then whether the rate adaptation configuration status when front port is to have carried out the rate adaptation configuration, if for requiring to carry out the state of rate adaptation configuration, rate adaptation configuration status when front port is not the state that has carried out the rate adaptation configuration simultaneously, then carries out the rate adaptation configuration process.
3, the method for a kind of ultrahigh bit rate data client line rate adaptive configuration according to claim 2 is characterized in that: when the self adaptation state of front port is provided with as required by the user.
4, the method for a kind of ultrahigh bit rate data client line rate adaptive configuration according to claim 2 is characterized in that: when the initial value of the rate adaptation configuration status of front port can be provided with as required by the user.
5, the method for a kind of ultrahigh bit rate data client line rate adaptive configuration according to claim 1, it is characterized in that: after setting up best rate mode, the rate adaptation configuration status of working as front port has been set to carry out the state of rate adaptation configuration.
6, the method for a kind of ultrahigh bit rate data client line rate adaptive configuration according to claim 1 is characterized in that: described snr computation formula is: SNR=k-10 * log
10Hex2Dec{SNRCON[23-0] } }.
7, according to the method for claim 1 or 6 described a kind of ultrahigh bit rate data client line rate adaptive configuration, it is characterized in that: also comprise a signal to noise ratio parameter table of comparisons during configured rate.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007033605A1 (en) * | 2005-09-26 | 2007-03-29 | Huawei Technologies Co., Ltd. | A method for achieving an automatic selection of operation modes in an xdsl network and the apparatus thereof |
| WO2008040249A1 (en) * | 2006-09-28 | 2008-04-10 | Huawei Technologies Co., Ltd. | A method and system for selecting run mode |
| CN101141358B (en) * | 2007-10-26 | 2010-06-09 | 中国电信股份有限公司 | Method and system of preestimating DSL maximum linking velocity |
| CN1855917B (en) * | 2005-04-21 | 2010-09-22 | 华为技术有限公司 | Method for realizing automatic choosing running mode in xDSL network |
| CN101981909A (en) * | 2008-03-31 | 2011-02-23 | 英国电讯有限公司 | Data communication |
| CN101047459B (en) * | 2006-05-19 | 2011-05-04 | 华为技术有限公司 | Method for dynamic managing xDSL specturm and its device |
| CN101213827B (en) * | 2005-06-02 | 2012-10-10 | 适应性频谱和信号校正股份有限公司 | Self-learning and self-adjusting dsl system |
| CN101312361B (en) * | 2007-05-23 | 2013-08-07 | 华为技术有限公司 | Digital subscriber line parameter collecting method, module and circuit management system |
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2004
- 2004-10-27 CN CN 200410073200 patent/CN1602039A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1855917B (en) * | 2005-04-21 | 2010-09-22 | 华为技术有限公司 | Method for realizing automatic choosing running mode in xDSL network |
| CN101213827B (en) * | 2005-06-02 | 2012-10-10 | 适应性频谱和信号校正股份有限公司 | Self-learning and self-adjusting dsl system |
| WO2007033605A1 (en) * | 2005-09-26 | 2007-03-29 | Huawei Technologies Co., Ltd. | A method for achieving an automatic selection of operation modes in an xdsl network and the apparatus thereof |
| CN101047459B (en) * | 2006-05-19 | 2011-05-04 | 华为技术有限公司 | Method for dynamic managing xDSL specturm and its device |
| WO2008040249A1 (en) * | 2006-09-28 | 2008-04-10 | Huawei Technologies Co., Ltd. | A method and system for selecting run mode |
| CN101312361B (en) * | 2007-05-23 | 2013-08-07 | 华为技术有限公司 | Digital subscriber line parameter collecting method, module and circuit management system |
| CN101141358B (en) * | 2007-10-26 | 2010-06-09 | 中国电信股份有限公司 | Method and system of preestimating DSL maximum linking velocity |
| CN101981909A (en) * | 2008-03-31 | 2011-02-23 | 英国电讯有限公司 | Data communication |
| CN101981909B (en) * | 2008-03-31 | 2013-06-12 | 英国电讯有限公司 | Data communication |
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