CN1713679A - Template replacing method in asymmetric user line - Google Patents
Template replacing method in asymmetric user line Download PDFInfo
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- CN1713679A CN1713679A CN200410049962.2A CN200410049962A CN1713679A CN 1713679 A CN1713679 A CN 1713679A CN 200410049962 A CN200410049962 A CN 200410049962A CN 1713679 A CN1713679 A CN 1713679A
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Abstract
The invention consists of modem in client-side, modem in central office terminal and embedded operation channel used to make interaction between modems in client-side and in central office terminal. The method includes following steps: 1) the modem at client-side sends instruction of replacing template to modem in central office terminal, and templates id message in template under replacing in modem in client-side is replaced; 2) the modem in central office terminal executes replacement of template, and sends instruction of success or failure to modem in client-side.
Description
Technical field
The present invention relates to asymmetric subscriber's line (ADSL, Asymmetric Digital Subscriber Line), refer to template replacement method in a kind of asymmetric subscriber's line especially.
Background technology
ADSL is by asymmetric transmission, utilize frequency multiplexing technique (FDM, Frequency DivisionMultiplexing) or Echo Cancellation technology (Echo Cancellation) uplink and downlink channel branch is come reduce the influence of cross-talk, thereby the high speed that realizes signal transmits.
In order to utilize a plurality of channels, ADSL Modem adopts the bandwidth of the telephone line of above-mentioned dual mode utilization.The FDM mode is ascender and descender with frequency band division, and down channel is being one or more IA High Speed Channel and low rate channel by time division multiplexing (Time Division Multiplexing); And up channel also can be multiplexed with corresponding low rate channel.Like this, because can transmitting on twisted-pair feeder by the frequency division multiplexing principle simultaneously, these two kinds of business are independent of each other, the frequency band of Plain Old Telephone Service (PORTS) is between 200Hz～3200Hz, and the upstream band of ADSL business is between 25KHz～138KHz, downstream bands can be transmitted on the plain old telephone twisted-pair feeder and not influence plain old telephone service between 138KHz～1104KHz.The Echo Cancellation technology is cancelled out each other up channel and the down channel lap on frequency band, can separate the uplink and downlink channel effectively by the Echo Cancellation technology of this locality, reduces the influence of cross-talk to channel, thereby the high speed that realizes signal transmits.
Please refer to shown in Figure 1, embedding operation channel (EOC, Embedded Operation Channel) 3, be local side modulator-demodulator (ATU-C, ADSL is at the transmission unit of access point) 2 be in operation and be used for pipeline with user side modulator-demodulator (ATU-R, ADSL is at the transmission unit of far-end) 1 contact.
Please refer to shown in Figure 2ly, the filter effect is exactly the POTS signal of 200Hz～3200Hz to be separated from twisted-pair feeder deliver to the subscriber phone phone and realize plain old telephone service.General filter has three sockets, be respectively LINE, POTS, ADSL, what the LINE socket connect is the service wire that the terminal box from user family is come out, be the mixed signal line of POTS+ADSL this moment on this service wire, receives on the phone phone by the POTS socket of separator through the POTS signal that is separated behind the filter.The ADSL signal is then received on the modulator-demodulator by the ADSL socket of separator.
Uplink service, be that the user side modulator-demodulator sends data, the local side modulator-demodulator receives data, this process is that the user side modulator-demodulator is converted to analog signal with digital signal and is modulated on the upstream band of 25KHz～138KHz, deliver to filter (user side separator), just be modulated onto on the root user twisted-pair feeder through ADSL signal behind the filter with from the POTS signal that the phone phone is sent here, this root user twisted-pair feeder is through outside line, the outside line distributing frame is delivered in the back end filter of telecommunication bureau, this filter is separated the POTS signal of 200Hz～3200Hz by twisted-pair feeder from twisted-pair feeder and is received the common telephone service of switch realization, the twisted-pair feeder that the ADSL signal is drawn from the ADSL mouth of filter is linked into the local side modulator-demodulator, thereby the ADSL signal is that digital signal is delivered to realization data upload business on the public network through local side modulation processing with analog signal conversion.In fact downlink business is exactly the contrary operation of uplink service, repeats no more.In the whole like this data transmission procedure, filter, terminal box, distributing frame etc. constitute the embedding operation channel.
Please refer to shown in Figure 3ly, local side modulator-demodulator and user side modulator-demodulator carry out bit exchange by embedding operation Channel Transmission ADSL multi-frame, and described ADSL multi-frame is combined into by 68 frames, and frame is made up of bit.
Please refer to Fig. 4, Fig. 5 a, Fig. 5 b, Fig. 5 c and Fig. 5 d, the EOC message length is 13 and is divided into two bytes, first byte must be placed on the position of the quick byte in the even frame in these two bytes, and second byte must be placed on the position of the quick byte in subsequently the odd-numbered frame.And the 0th of all EOC Byte is " 1 " (being used to distinguish SC Byte, the 0th " 0 " of SC Byte).Be stored in even number when descending and subsequently in the LEX byte of two successive frames of odd number; Then there is even number when up and subsequently in the quick byte of two successive frames of odd number.
13 EOC information is divided into 5 sections, represents different meanings, is listed as follows for every section:
| Segment number | Data bit | Describe and effect |
| ??1 | ??1、2 | Address field: 112: local side modulator-demodulator address 002: does not use user side modulator-demodulator address 102 and 012 |
| ??2 | ??3 | Data (Data) or instruction (Opcode) indicating bit: Data:0 Opcode:1 |
| ??3 | ??4 | Parity bytes indicating bit: odd number (Odd): 1 even number (Even): 0 |
| ??4 | ??5 | From the photos and sending messages indicating bit: for the local side modem: the local side modem sends instructions under to the user side modem: 1 local side modem is from sending instructions: 0 for the user side modem: the response that the instruction that the local side modem is issued is made: 1 user side modem is from sending instructions: 0 |
| ??5 | ??6～13 | Message segment, this section contain EOC data or EOC instruction |
The local side modulator-demodulator makes it carry out state transition and activation parameter inquiry by above-mentioned embedding operation channel exactly to sending instructions under the user side modulator-demodulator, and the user side modulator-demodulator also can send instruction to the local side modulator-demodulator by this embedding operation channel.At present basically have 3 kind from the photos and sending messages indicating bit for the situation of " 0 " for the user side modulator-demodulator: dying words (dying gasp) information sends; Send UTC (Unable to ComplyAcknowledgement) instruction in the time of can't explaining the instruction that the local side modulator-demodulator sends; Inform ED, send this instruction back user side modulator-demodulator and just wait for that the local side modulator-demodulator sends the order of " next bit ".Really the instruction of being initiated by the user side modulator-demodulator then has only dying words (dying gasp) a kind of, and other two are denoted as from what send instructions in fact also is response to the local side modulator-demodulator.
General local side modulator-demodulator comprises fast Template and i.e. two template sets of template two big classes that interweave, and audio frequency and video was used when the fast Template collection was applicable to network implementation, and the template set that interweaves is applicable to network browsing and uploads data download and use.Difference according to limiting speed under this two big collection can have the several representative template to select for the user.
Replacing to template in the prior art is all initiated by the local side modulator-demodulator, because the instruction that the user side modulator-demodulator does not have other initiatively to initiate, also can't initiatively change template, the user side modem feature is simple and to change the method for template single, underaction like this.
Summary of the invention
The present invention deals with problems and provides in a kind of asymmetric subscriber's line the template replacement method and avoid single and changed by the local side modulator-demodulator.
For addressing the above problem, the present invention discloses a kind of asymmetric subscriber's line template replacement method.Described asymmetric subscriber's line comprise user side modulator-demodulator, local side modulator-demodulator and be used for the user side modulator-demodulator and the local side modulator-demodulator between mutual embedding operation channel; Described local side modulator-demodulator comprises some templates, said method comprising the steps of: request step, the user side modulator-demodulator sends to the local side modulator-demodulator and changes the template instruction, changes to comprise in the template instruction that the user side modulator-demodulator will change the template identifying information of template; Change step, the local side modulator-demodulator is carried out template replacement, and changes failure command or change successfully instruction to user side modulator-demodulator feedback.
Asymmetric subscriber's line template replacement method is further comprising the steps of: identification step, local side modulator-demodulator are judged the template that whether will change for the user side modulator-demodulator when front template according to the template identifying information; If working as front template is the template that the user side modulator-demodulator will be changed, then the local side modulator-demodulator sends to the user side modulator-demodulator and need not to change instruction; If, then carry out determining step when front template is not the template that the user side modulator-demodulator will be changed; Determining step judges whether this local side modem port allows to change template; If port blocking is changed template, then the local side modulator-demodulator sends to the user side modulator-demodulator and need not to change instruction; If port allows to change template, then carry out and change step.
Also comprised the following step that sets in advance at the user side modulator-demodulator before the local side modulator-demodulator sends the instruction of replacing template: the port authority is provided with step, and the template replacement authority of user side modulator-demodulator is set at the local side modem port; Protocol instructions is provided with step, is provided with in the employing host-host protocol of embedding operation channel: user side modulator-demodulator need not to the instruction of the replacing template of local side modulator-demodulator direction, local side modulator-demodulator to user side modulator-demodulator direction changed instruction, local side modulator-demodulator to the replacing failure command and user side modulator-demodulator to the replacing of local side modulator-demodulator direction of user side modulator-demodulator direction successfully instructed; The user side modulator-demodulator is finished template replacement according to the described instruction of template replacement authority and embedding operation channel.
Described host-host protocol is ITU-T G..992.1, and this agreement proprietary protocol command code 1916,1A16,1C16 and 1F16 are provided with realization:
| Instruction | Command code | Direction |
| The instruction of replacing template | ??1916 | The user side modulator-demodulator is to the local side modulator-demodulator |
| Need not to change instruction | ??1A16 | The local side modulator-demodulator is to the user side modulator-demodulator |
| Change the template failure command | ??1C16 | The local side modulator-demodulator is to the user side modulator-demodulator |
| Changing template successfully instructs | ??1F16 | The local side modulator-demodulator is to the user side modulator-demodulator |
Described replacing step comprises the steps: further to judge whether the template after the replacing can activate corresponding user side modulator-demodulator; If can not activate, then change failure command to user side modulator-demodulator feedback; If can activate, change successfully instruction to user side modulator-demodulator feedback.
May further comprise the steps before feedback is changed failure command: the local side modulator-demodulator is changed same template and is concentrated the operation of other template and excited users end modulator-demodulator once more, if can activate, then change successfully instruction to user side modulator-demodulator feedback; If still can not activate, then the local side modulator-demodulator uses the template of the last successful excited users end modulator-demodulator to activate this user side modulator-demodulator and changes failure command to user side modulator-demodulator feedback.
Described template set comprises interweave template set and fast Template collection, and the described template set that interweaves comprises the template that interweaves that several are divided according to interleave depth, noise margin and speed limit value; And described fast Template collection comprises the fast Template that several are divided according to noise margin and speed limit value.
If the local side modulator-demodulator is not supported to revise embedded channel receive the user side modulator-demodulator send change the template instruction after, there is not response, and comprise the steps: further after the described request step that the user side modulator-demodulator is according to the predetermined number of retransmissions of changing the template instruction, do not receive response if surpass predetermined number of retransmissions, then return failure command, finish to change the operation of template to the user.
Compared with prior art, the present invention has the following advantages:
To make user side can have the more independence function by the instruction that increases in the agreement, and make user terminal be tending towards more having enriched the business function of user side flexibly, the template to the port that can be spontaneous be changed to adapt to different application scenarios.Thereby the user can freely dispose the user bandwidth of oneself according to the networking speed needs of oneself and enjoy different customer rates, and such as just hanging down in the speed that browses web sites so, downloading the speed that software or film require will be more greatly.The user is less demanding and very high to the accuracy requirement of data to network delay when data download for another example, so at this moment just can adopt the template that interweaves of interlace mode; Relative, when the online request video display, will be very little and just can adopt the fast Template of quick mode under the situation to data quality requirement not high (even a small amount of error code is arranged, for visual effect and not obvious) to delay requirement.
In numerous active templates, select representative several template and made a set, if if then the user selected to change fast or after the template that interweaves can't according to the user require excited users end modulator-demodulator so in identical template set selection speed template lower or that noise margin is less attempt the user side modulator-demodulator is activated, can guarantee that so more the user changes the probability of success that active template is operated.
Protection mechanism whether local side allows the authority setting of changing and the failure of activating is arranged to the user after promptly activates successful template according to the last time and activates.Be convenient to the security control of local side like this to template replacement.
In the replacing process, adopt template set, improve the probability of success of template replacement.
Description of drawings
Fig. 1 is the block diagram of the asymmetric subscriber's line of prior art.
Fig. 2 is Fig. 1 refinement figure.
Fig. 3 is an ADSL multi-frame structure schematic diagram.
Fig. 4 is a rapid data structural representation among Fig. 3.
Fig. 5 a to 5d is the quick byte odd and even data of an ADSL structure.
Fig. 6 is an ADSL host-host protocol ITU-T G..992.1 schematic diagram.
Fig. 7 a to 7d is template replacement method decomposition process figure in the asymmetric subscriber's line of the present invention.
Fig. 8 is template replacement method overall flow figure in the asymmetric subscriber's line of the present invention.
Embodiment
Asymmetric subscriber's line comprise user side modulator-demodulator, local side modulator-demodulator and be used for the user side modulator-demodulator and the local side modulator-demodulator between mutual embedding operation channel; Described local side modulator-demodulator comprises some templates.Certainly send instructions for the user side modulator-demodulator in the prior art, have 3 kinds at present basically: dying words (dying gasp) information sends; Send UTC (Unable to Comply Acknowledgement) instruction in the time of can't explaining the instruction that the local side modulator-demodulator sends; Inform ED, send this instruction back user side modulator-demodulator and just wait for that the local side modulator-demodulator sends the order of " next bit ".Really the instruction of being initiated by the user side modulator-demodulator then has only dying words (dying gasp) a kind of, and other two are denoted as from what send instructions in fact also is response to the local side modulator-demodulator.The asymmetric subscriber's line template replacement of the present invention method is initiatively initiated by the user side modulator-demodulator, so need to increase sending instructions certainly of user side modulator-demodulator.
Please refer to shown in Figure 6ly, Fig. 6 is ADSL host-host protocol ITU-T G..992.1, and required state transition instruction and the control command sign indicating number of regulation embedding operation channel stipulated also that simultaneously part unused instruction sign indicating number is that the reserve statement sign indicating number does not allow to be used as other purposes.Simultaneously, also stipulated 1916 in this host-host protocol, 1A16,1C16,1F16 are supplier's proprietary protocol command code, then can increase sending instructions certainly of user side modulator-demodulator by these command codes.Described host-host protocol is ITU-T G..992.1, and this agreement proprietary protocol command code 1916,1A16,1C16 and 1F16 carry out as the following table setting:
| Instruction | Command code | Direction |
| The instruction of replacing template | ??1916 | The user side modulator-demodulator is to the local side modulator-demodulator |
| Need not to change instruction | ??1A16 | The local side modulator-demodulator is to the user side modulator-demodulator |
| Change the template failure command | ??1C16 | The local side modulator-demodulator is to the user side modulator-demodulator |
| Changing template successfully instructs | ??1F16 | The local side modulator-demodulator is to the user side modulator-demodulator |
Like this, the asymmetric subscriber's line template replacement of the present invention method, comprised the following step that sets in advance at the user side modulator-demodulator before the local side modulator-demodulator sends the instruction of replacing template: the port authority is provided with step, and the template replacement authority of user side modulator-demodulator is set at the local side modem port; Protocol instructions is provided with step, is provided with in the employing host-host protocol of embedding operation channel: user side modulator-demodulator need not to the instruction of the replacing template of local side modulator-demodulator direction, local side modulator-demodulator to user side modulator-demodulator direction changed instruction, local side modulator-demodulator to the replacing failure command and user side modulator-demodulator to the replacing of local side modulator-demodulator direction of user side modulator-demodulator direction successfully instructed; The user side modulator-demodulator is finished template replacement according to the described instruction of template replacement authority and embedding operation channel.
Please refer to shown in Figure 8ly, the utilization of user side modulator-demodulator increases sends instructions and existing from sending instructions certainly, realizes following each step of the present invention:
Described replacing step (step 87) further comprises the steps:
In addition, if the local side modulator-demodulator is not supported to revise EOC after the user side modulator-demodulator is initiated request, the local side modulator-demodulator just can not issue any response, the user side modulator-demodulator then can be specified a definite repeating transmission number of times, such as 1000 times, if never receive response, then return failure to the user, finish to change the operation of template.For example, between the step 80 and 84, also comprise and judge whether local side responds the instruction of replacing template, if respond then execution in step 84,, judge then whether this command retransmission number of times equals predetermined value (for example 1000 times) if there is not response, if equal then predetermined value, then sending the user side modulator-demodulator does not have response instruction, if be not equal to, then resend and changes the template instruction.
Please refer to Fig. 7 a to 7d, according to the asymmetric subscriber's line template replacement of different situations refinement the present invention method flow.
Please refer to Fig. 7 a, in this case after the local side modulator-demodulator receives the replacing template instruction that the user side modulator-demodulator sends out, judge that the template that will change in this request is not that the current template of using and this port allow to carry out template replacement operation, so the local side modulator-demodulator will carry out deexcitation user side modulator-demodulator, change the user port active template, according to the new template operation of excited users end modulator-demodulator again.After treating local side modulator-demodulator success excited users end modulator-demodulator, the local side modulator-demodulator sends the replacing template to the user side modulator-demodulator and successfully instructs, and the user side modulator-demodulator is received the operation of back end template replacement.
Please refer to Fig. 7 b, in this case after the local side modulator-demodulator receives the replacing template instruction that the user side modulator-demodulator sends out, judge that the port that will change in this request is to forbid the port changed, the local side modulator-demodulator will send to the user side modulator-demodulator and need not to change instruction so, and the user side modulator-demodulator is received the operation of back end template replacement.
Please refer to Fig. 7 c, in this case after the local side modulator-demodulator receives the replacing template instruction that the user side modulator-demodulator sends out, judge that the template that will change in this request is exactly the current template of using, the local side modulator-demodulator will send to the user side modulator-demodulator and need not to change instruction so, and the user side modulator-demodulator is received the operation of back end template replacement.
Please refer to Fig. 7 d, in this case after the local side modulator-demodulator receives the replacing template instruction that the user side modulator-demodulator sends out, judge that the template that will change in this request is not that the current template of using and this port allow to carry out template replacement operation, so the local side modulator-demodulator will carry out deexcitation user side modulator-demodulator, change the user port active template, according to the new template operation of excited users end modulator-demodulator again.Local side modulator-demodulator excited users end modulator-demodulator failure back local side modulator-demodulator is concentrated the operation of other template and excited users end modulator-demodulator once more with changing same template earlier, as activate success then the local side modulator-demodulator send and change active template and successfully instruct; As finally still can not activate then successfully activate the template excited users end modulator-demodulator of this port according to the last time after, send to the user side modulator-demodulator and to activate failure command, the user side modulator-demodulator receives that the back finishes the template replacement operation.
According to the ADSL standard, the main active mode of ADSL is divided into two big classes: interweave with quick, corresponding active template also is divided into and interweaves and quick two major types, correspondingly, the template set that the present invention adopts in the operating process of template replacement comprises interweave template set and fast Template collection, if if promptly the user selected to change fast or after the template that interweaves can't according to the user require excited users end modulator-demodulator so in identical template set selection speed template lower or that noise margin is less attempt the user side modulator-demodulator is activated, can guarantee that so more the user changes the probability of success that active template is operated.
Template set interweaves
The parameter that is provided with of template comprises a variety ofly, but the parameter that usually under the situation of interweaving performance is had a direct impact comprises: three kinds of interleave depth, noise margin and speed limits.
Wherein, described interleave depth comprises the uplink interlacing degree of depth and descending interleave depth, and usually said the uploading of described up finger promptly sends data from the user side modulator-demodulator to the local side modulator-demodulator; The usually said download of described descending finger promptly sends data from the local side modulator-demodulator to the user side modulator-demodulator.
The described uplink interlacing degree of depth and descending interleave depth can be defined in 5～255 interval interior any values, and the big more interleave depth of value is big more, and the accuracy of data is guaranteed more, and the time-delay of introducing thus is also big more.If generally we can to define interleave depth be 6 the data accuracy had high requirements to may be defined as 12.
Noise margin equally also is divided into upstream noise tolerance limit and descending noise margin, different with interleave depth is the corresponding change of variation meeting along with external interference in data transmission procedure of this value, so will define a constant interval to it, the maximum of upstream noise tolerance limit and descending noise margin can be defined in 0～15dB, and the minimum value of upstream noise tolerance limit and descending noise margin can be defined in 0～12dB.The maximum that generally can define upstream noise tolerance limit and descending noise margin is 12dB, if be also can not be set to 6dB to the transfer of data accuracy requirement is high, the minimum value of upstream noise tolerance limit and descending noise margin generally all is defined in 0dB.
Speed limit equally also is divided into speed uplink restriction and downstream rate restriction, this value is also in a constant interval, the user side modulator-demodulator can be at first in activation activates according to the maximum of definition, if can not activate then reduce 32Kbps and activate once more at every turn, till activating.This value is exactly a determined value after the user side modulator-demodulator activates like this.The maximum definable of speed uplink restriction is at 32～896Kbps, the minimum value of speed uplink restriction also definable at 32～896Kbps.The maximum definable of downstream rate restriction is at 32～8160Kbps, the minimum value of downstream rate restriction also definable at 32～8160Kbps.The maximum of speed uplink is commonly defined as 640Kbps, and minimum value is commonly defined as 32Kbps.The maximum of downstream rate is commonly defined as 8196Kbps, 6144Kbps, 4096Kbps or the 2048Kbps networking speed in order to the limited subscriber port, and minimum value is commonly defined as 32Kbps.
According to the variation of these three parameters of interleave depth, noise margin and speed limit, the described template set that interweaves comprises the template that interweaves that several are divided according to interleave depth, noise margin and speed limit value.In the present embodiment, the template set that interweaves comprise first, second, third and fourth, five and six templates that interweave, the parameter value of described each template that interweaves has certain representativeness.
First template that interweaves, its parameter value is: the uplink interlacing degree of depth 6; Descending interleave depth 6; Upstream noise tolerance limit maximum 6Db; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 6dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 896Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 8160Kbps; Downstream rate restriction minimum value: 32Kbps.
Second template that interweaves, its value is: the uplink interlacing degree of depth 6; Descending interleave depth 6; Upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 6144Kbps; Downstream rate restriction minimum value 32Kbps.
The 3rd template that interweaves, its value is: the uplink interlacing degree of depth 12; Descending interleave depth 12; Upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 6144Kbps; Downstream rate restriction minimum value 32Kbps.
The 4th template that interweaves, its value is: the uplink interlacing degree of depth 6; Descending interleave depth 6; Upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 4096Kbps; Downstream rate restriction minimum value 32Kbps.
The 5th template that interweaves, its value is: the uplink interlacing degree of depth 6; Descending interleave depth 6; Upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 2048Kbps; Downstream rate restriction minimum value 32Kbps.
The 6th template that interweaves, its value is: the uplink interlacing degree of depth 12; Descending interleave depth 12; Upstream noise tolerance limit maximum 6dB; Upstream noise tolerance limit minimum value: 0dB; Descending noise margin maximum 6dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 2048Kbps; Downstream rate restriction minimum value 32Kbps.
The fast Template collection
The parameter that is provided with of fast Template also comprises a variety ofly, but the parameter that usually under situation fast performance is had a direct impact comprises: two kinds of noise margin and speed limits.
The noise margin of fast Template equally also is divided into upstream noise tolerance limit and descending noise margin, the maximum of upstream noise tolerance limit and descending noise margin can be defined in 0～15dB, and the minimum value of upstream noise tolerance limit and descending noise margin can be defined in 0～12dB.The maximum that generally can define upstream noise tolerance limit and descending noise margin is 12dB, if be also can not be set to 6dB to the transfer of data accuracy requirement is high, the minimum value of upstream noise tolerance limit and descending noise margin generally all is defined in 0dB.
Speed limit equally also is divided into speed uplink restriction and downstream rate restriction, this value is in a constant interval, the user side modulator-demodulator can be at first in activation activates according to maximum, if can not activate then reduce 32Kbps and activate once more at every turn, till activating.This value is exactly a determined value after the user side modulator-demodulator activates like this.The maximum definable of speed uplink restriction is at 32～896Kbps, the maximum of speed uplink restriction also definable at 32～896Kbps.The maximum definable of downstream rate restriction is at 32～8160Kbps, the minimum value of downstream rate restriction also definable at 32～8160Kbps.The maximum of speed uplink is commonly defined as 640Kbps, and minimum value is commonly defined as 32Kbps.The maximum of downstream rate is commonly defined as 8196Kbps, 6144Kbps, 4096Kbps, 2048Kbps or the 4196Kbps networking speed in order to the limited subscriber port, and minimum value is commonly defined as 32Kbps.
According to the variation of noise margin and these two parameters of speed limit, described fast Template collection comprises the fast Template that several are divided according to noise margin and speed limit value.In the present embodiment, the fast Template collection comprise first, second, third and fourth, five and six fast Template, the parameter value of described each fast Template has certain representativeness.
First fast Template, its parameter value is: upstream noise tolerance limit maximum 6dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 6dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 896Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 8160Kbps; Downstream rate restriction minimum value 32Kbps.
Second fast Template, its parameter value is: upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 6144Kbps; Downstream rate restriction minimum value 32Kbps;
The 3rd fast Template, its parameter value is: upstream noise tolerance limit maximum 6dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 6dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 6144Kbps; Downstream rate restriction minimum value 32Kbps.
The 4th fast Template, its parameter value is: upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 4096Kbps; Downstream rate restriction minimum value 32Kbps.
The 5th fast Template, its parameter value is: upstream noise tolerance limit maximum 12dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 12dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 2048Kbps; Downstream rate restriction minimum value 32Kbps.
The 6th fast Template, its parameter value is: upstream noise tolerance limit maximum 6dB; Upstream noise tolerance limit minimum value 0dB; Descending noise margin maximum 6dB; Descending noise margin minimum value 0dB; Speed uplink restriction maximum 640Kbps; Speed uplink restriction minimum value 32Kbps; Downstream rate restriction maximum 2048Kbps; Downstream rate restriction minimum value 32Kbps.
In sum, the asymmetric subscriber's line template replacement of the present invention method realizes making that by the template replacement operation of user side modulator-demodulator initiation sending instructions certainly of user side modulator-demodulator is abundanter that it is more flexible to change template way.Thereby the user can freely dispose the user bandwidth of oneself according to the networking speed needs of oneself and enjoy different customer rates, and such as just hanging down in the speed that browses web sites so, downloading the speed that software or film require will be more greatly.The user is less demanding and very high to the accuracy requirement of data to network delay when data download for another example, so at this moment just can adopt the template that interweaves of interlace mode; Relative, when the online request video display, will be very little and just can adopt the fast Template of quick mode under the situation to data quality requirement not high (even a small amount of error code is arranged, for visual effect and not obvious) to delay requirement.In addition, in the template replacement process, adopt template set, improve the probability of success of changing.
Claims (8)
1. asymmetric subscriber's line template replacement method, described asymmetric subscriber's line comprise user side modulator-demodulator, local side modulator-demodulator and be used for the user side modulator-demodulator and the local side modulator-demodulator between mutual embedding operation channel; Described local side modulator-demodulator comprises some templates, it is characterized in that, said method comprising the steps of:
Request step, user side modulator-demodulator are sent to the local side modulator-demodulator and are changed the template instruction, change to comprise in the template instruction that the user side modulator-demodulator will change the template identifying information of template;
Change step, the local side modulator-demodulator is carried out template replacement, and changes failure command or change successfully instruction to user side modulator-demodulator feedback.
2. asymmetric subscriber's line template replacement method as claimed in claim 1, it is characterized in that, further comprising the steps of: identification step, local side modulator-demodulator are judged the template that whether will change for the user side modulator-demodulator when front template according to the template identifying information; If working as front template is the template that the user side modulator-demodulator will be changed, then the local side modulator-demodulator sends to the user side modulator-demodulator and need not to change instruction; If, then carry out determining step when front template is not the template that the user side modulator-demodulator will be changed;
Determining step judges whether this local side modem port allows to change template; If port blocking is changed template, then the local side modulator-demodulator sends to the user side modulator-demodulator and need not to change instruction; If port allows to change template, then carry out and change step.
3. asymmetric subscriber's line template replacement method as claimed in claim 1 or 2 is characterized in that, also comprises the following step that sets in advance at the user side modulator-demodulator before the local side modulator-demodulator sends the instruction of replacing template:
The port authority is provided with step, and the template replacement authority of user side modulator-demodulator is set at the local side modem port;
Protocol instructions is provided with step, is provided with in the employing host-host protocol of embedding operation channel: user side modulator-demodulator need not to the instruction of the replacing template of local side modulator-demodulator direction, local side modulator-demodulator to user side modulator-demodulator direction changed instruction, local side modulator-demodulator to the replacing failure command and user side modulator-demodulator to the replacing of local side modulator-demodulator direction of user side modulator-demodulator direction successfully instructed; The user side modulator-demodulator is finished template replacement according to the described instruction of template replacement authority and embedding operation channel.
4. asymmetric subscriber's line template replacement method as claimed in claim 3 is characterized in that described host-host protocol is ITU-TG..992.1, and this agreement proprietary protocol command code 1916,1A16,1C16 and 1F16 are provided with realization:
Instruction Command code Direction
The instruction of replacing template ??1916 The user side modulator-demodulator is to the local side modulator-demodulator
Need not to change instruction ??1A16 The local side modulator-demodulator is to the user side modulator-demodulator
Change the template failure command ??1C16 The local side modulator-demodulator is to the user side modulator-demodulator
Changing template successfully instructs ??1F16 The local side modulator-demodulator is to the user side modulator-demodulator
5. asymmetric subscriber's line template replacement method as claimed in claim 3 is characterized in that described replacing step further comprises the steps:
Judge whether the template after changing can activate corresponding user side modulator-demodulator;
If can not activate, then change failure command to user side modulator-demodulator feedback;
If can activate, change successfully instruction to user side modulator-demodulator feedback.
6. asymmetric subscriber's line template replacement method as claimed in claim 5, it is characterized in that, may further comprise the steps before feedback is changed failure command: the local side modulator-demodulator is changed same template and is concentrated the operation of other template and excited users end modulator-demodulator once more, if can activate, then change successfully instruction to user side modulator-demodulator feedback; If still can not activate, then the local side modulator-demodulator uses the template of the last successful excited users end modulator-demodulator to activate this user side modulator-demodulator and changes failure command to user side modulator-demodulator feedback.
7. asymmetric subscriber's line template replacement method as claimed in claim 6, it is characterized in that, described template set comprises interweave template set and fast Template collection, and the described template set that interweaves comprises the template that interweaves that several are divided according to interleave depth, noise margin and speed limit value; And described fast Template collection comprises the fast Template that several are divided according to noise margin and speed limit value.
8. asymmetric subscriber's line template replacement method as claimed in claim 3, it is characterized in that, if the local side modulator-demodulator is not supported to revise embedded channel receive the user side modulator-demodulator send change the template instruction after, there is not response, and comprise the steps: further after the described request step that the user side modulator-demodulator is according to the predetermined number of retransmissions of changing the template instruction, do not receive response if surpass predetermined number of retransmissions, then return failure command, finish to change the operation of template to the user.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008074225A1 (en) * | 2006-12-21 | 2008-06-26 | Huawei Technologies Co., Ltd. | Template replacement method, system and device |
| WO2010057404A1 (en) * | 2008-11-24 | 2010-05-27 | 中兴通讯股份有限公司 | Vdsl2 configuration management model based on actual business application scenarios |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008074225A1 (en) * | 2006-12-21 | 2008-06-26 | Huawei Technologies Co., Ltd. | Template replacement method, system and device |
| WO2010057404A1 (en) * | 2008-11-24 | 2010-05-27 | 中兴通讯股份有限公司 | Vdsl2 configuration management model based on actual business application scenarios |
| CN101741606B (en) * | 2008-11-24 | 2011-12-28 | 中兴通讯股份有限公司 | Actual service application scene-based VDSL2 configuration management model |
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