Function
This command is used to add a very-high-speed digital subscriber line 2
(VDSL2) channel profile. When the existing VDSL2 channel profiles cannot meet
the line activation requirements, run the command to add a new VDSL2 channel
profile. After this command is executed successfully, the new VDSL2 channel
profile can be bound to a VDSL2 line profile to be a VDSL2 template that is used
to activate a port.
Parameters
| Parameter | Description | Value |
|---|---|---|
| profile-index |
Indicates the ID of a VDSL2 channel profile. When creating a VDSL2 channel
profile, specify the profile ID or not. If you do not specify it, the system
allocates the smallest idle ID automatically. The system has a default VDSL2
channel profile. The profile number is 1, which only can be modified, but cannot
be deleted. Parameters in the default profile are the data for reference. You
can add new profiles according to actual channel conditions. The system supports a maximum of VDSL2 channel profile: |
Numeral type. Range: For SCUN/SCUK board: 2-2048, for other control boards: 2-770. |
Usage Guidelines
- Run the config command to enter global config mode and run the interface vdsl command to enter VDSL mode.
- A VDSL2 channel profile provides a series of parameters: the data channel mode, the minimum impulse noise protection (INP), the interleaved delay parameters, the rate parameters, the retransmission function at the physical layer, the erasure decoding function, and the G.998.4 retransmission function. When a port is being activated, the VTU-R negotiates with the VTU-C based on the parameters in the line profile, so as to determine whether the connection can be set up between them under existing conditions.
- A VDSL channel can be a fast or interleaved channel.
- In an interleaved channel, bit streams, after they are coded by forward error correction (FEC), are sent to interleaved register to be interleaved and then sent to lines. On the other side of the line, bit streams are deinterleaved correspondingly. In interleaved mode, the greater the interleaved depth, the stronger the error correction capability , but the larger the delay.
- In a fast channel, bit streams, after they are coded by FEC, are sent to lines directly without interleave processing . In fast mode, the delay is smaller but the error correction capability is weak.
- When configuring a profile, pay attention to the following points:
- If the configured data channel mode is not consistent with the mode supported by the actual physical line, the line activation is assured with preference. For example, if the transmission mode in the bound line profile is ADSL mode, and that in the channel profile is the packet transfer mode (PTM), the system does not judge or prompt. After it is issued to the board, the transmission mode on a board adapts to the asynchronous transfer mode (ATM) automatically to ensure line activation with preference.
- Only when both the central office (CO) and customer premises equipment (CPE) support asynchronous transfer mode (ATM) and packet transfer mode (PTM), options ATM and PTM are valid.
- The minimum impulse noise protection (INP) is correlated to the interleaved delay. In fast mode, both the INP value and the interleave delay are 0. When you configure INP, the system does not judge the restriction between the INP and the interleaved delay or other parameters. The board adapts INP automatically and the line activation is assured with preference.
- When the fixed adaptation mode for upstream or downstream transmission rate is adopted, the maximum activation rate must be the same as the minimum in the same direction. When the fixed adaptation mode is not adopted, the maximum rate must be larger than the minimum.
Example
Assume that:
- The data channel mode is PTM.
- The upstream and downstream minimum INPs are 2.
- The upstream and downstream maximum INPs are 17.
- The upstream and downstream interleaved delays are 50 ms.
- The rate parameters use the default values.
huawei(config)#vdsl channel-profile add
{ <cr>|profile-index<U><2,2048> }:
Command:
vdsl channel-profile add
Start adding profile
Press 'Q' to quit the current configuration and new configuration will be
neglected
> Do you want to name the profile (y/n) [n]:
> Data path mode 1-ATM, 2-PTM, 3-Both (1~3) [3]:2
> Will you set the minimum impulse noise protection? (y/n) [n]:y
> Minimum impulse noise protection downstream:
> 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols
> 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols
> 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols
> 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols
> 17-fifteenSymbols 18-sixteenSymbols
> Please select (1~18) [1]:2
> Minimum impulse noise protection upstream:
> 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols
> 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols
> 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols
> 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols
> 17-fifteenSymbols 18-sixteenSymbols
> Please select (1~18) [1]:2
> Will you set interleaving delay parameters? (y/n) [n]:y
> Maximum interleaving delay downstream (0~200,255 ms) [20]:50
> Maximum interleaving delay upstream (0~200,255 ms) [20]:50
> Will you set parameters for rate? (y/n) [n]:y
> Minimum transmit rate downstream (32~200000 Kbps) [32]:
> Minimum reserved transmit rate downstream (32~200000 Kbps) [32]:
> Maximum transmit rate downstream (32~200000 Kbps) [200000]:
> Minimum transmit rate upstream (32~200000 Kbps) [32]:
> Minimum reserved transmit rate upstream (32~200000 Kbps) [32]:
> Maximum transmit rate upstream (32~200000 Kbps) [200000]:
> Minimum data rate in low power state (32~200000 Kbps) [32]:
> The ratio between L2 minimum rate and L0 rate (0~99 %) [0]:
> Maximum data rate in low power state (32~200000 Kbps) [4000]:
> Will you set rate thresholds? (y/n) [n]:y
> Rate threshold downshift downstream (0~200000 Kbps) [0]:
> Rate threshold upshift downstream (0~200000 Kbps) [0]:
> Rate threshold downshift upstream (0~200000 Kbps) [0]:
> Rate threshold upshift upstream (0~200000 Kbps) [0]:
> Will you set PHY-R function? (y/n) [n]:y
> Enable or disable PHY-R function in downstream 1-enable 2-disable
(1~2) [2]:1
> Maximum INP on downstream direction:
> 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols
> 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols
> 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols
> 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols
> 17-fifteenSymbols 18-sixteenSymbols
> Please select (1~18) [1]:17
> Minimum rtxratio in downstream (0~255) [0]:
> Minimum rsoverhead in downstream (0~128) [0]:
> Enable or disable PHY-R function in upstream 1-enable 2-disable (1
~2) [2]:1
> Maximum INP on upstream direction:
> 1-noProtection 2-halfSymbol 3-singleSymbol 4-twoSymbols
> 5-threeSymbols 6-fourSymbols 7-fiveSymbols 8-sixSymbols
> 9-sevenSymbols 10-eightSymbols 11-nineSymbols 12-tenSymbols
> 13-elevenSymbols 14-twelveSymbols 15-thirteenSymbols 16-fourteenSymbols
> 17-fifteenSymbols 18-sixteenSymbols
> Please select (1~18) [1]:17
> Minimum rtxratio in upstream (0~255) [0]:
> Minimum rsoverhead in upstream (0~128) [0]:
> Will you set erasure decoding? (y/n) [n]:y
> Erasure decoding switch 1-enable 2-disable (1~2) [2]:1
> Will you set SOS bit rate? (y/n) [n]:y
> Minimum SOS bit rate in downstream(Kbps) (0~65535) [8]:
> Minimum SOS bit rate in upstream(Kbps) (0~65535) [8]:
> Will you set the G.998.4 retransmission function? (y/n) [n]:y
> Minimum expected throughput downstream (32~200000 Kbps) [32]:
> Maximum expected throughput downstream (32~200000 Kbps) [200000]:
> Maximum net data rate downstream (200000~200000 Kbps) [200000]:
> Minimum delay downstream (0~63 ms) [0]:
> Maximum delay downstream (1~63 ms) [63]:
> Minimum impulse noise protection against single high impulse noise event
downstream (0~63 DMT symbol) [0]:
> Minimum impulse noise protection against single high impulse noise event
transported over DMT symbols with a subcarrier spacing of 8.625kHz downstream (
0~127 DMT symbol) [0]:
> Single high impulse noise event ratio downstream (0~100 0.001) [0]:
> Minimum impulse noise protection against repetitive electrical impulse
noise downstream (0~7 DMT symbol) [0]:
> Minimum impulse noise protection against repetitive electrical impulse
noise transported over DMT symbols with a subcarrier spacing of 8.625kHz
downstream (0~13 DMT symbol) [0]:
> Repetitive electrical impulse noise inter-arrival time downstream 0-100Hz
1-120Hz (0~1) [0]:
> Minimum expected throughput upstream (32~200000 Kbps) [32]:
> Maximum expected throughput upstream (32~200000 Kbps) [200000]:
> Maximum net data rate upstream (200000~200000 Kbps) [200000]:
> Minimum delay upstream (0~63 ms) [0]:
> Maximum delay upstream (1~63 ms) [63]:
> Minimum impulse noise protection against single high impulse noise event
upstream (0~63 DMT symbol) [0]:
> Minimum impulse noise protection against single high impulse noise event
transported over DMT symbols with a subcarrier spacing of 8.625kHz upstream (0~
127 DMT symbol) [0]:
> Single high impulse noise event ratio upstream (0~100 0.001) [0]:
> Minimum impulse noise protection against repetitive electrical impulse
noise upstream (0~7 DMT symbol) [0]:
> Minimum impulse noise protection against repetitive electrical impulse
noise transported over DMT symbols with a subcarrier spacing of 8.625kHz
upstream (0~13 DMT symbol) [0]:
> Repetitive electrical impulse noise inter-arrival time upstream 0-100Hz
1-120Hz (0~1) [0]:
> Will you set channel initialization policy selection? (y/n) [n]:y
> Channel initialization policy selection (0~2) [0]:
> Will you set maximum delay variation? (y/n) [n]:y
> Maximum delay variation, it ranges from 0.1 to 25.4 in steps of 0.1 ms
> A special value 255 indicates that no delay variation bound is imposed
> (1~255 0.1ms) [255]:
> Will you set memory percent? (y/n) [n]:y
> Max delay octet split parameter (0~100, 255 percent) [255]:
Add profile 2 successfully
System Response
- The system displays the message "Add profile x successfully" after a VDSL2 channel profile is added successfully. "x" is the ID of the created profile.
- The following table describes the parameters in response to the
vdsl channel-profile add command.
Parameter Description Data path mode There are two types of channel modes: ATM and PTM. In general, only a VDSL2 line supports the PTM. By default, the system supports both the ATM and PTM. You can select the mode for a board based on the actual line conditions.
A line activated using the VDSL2 standard supports only PTM encapsulation; a line activated using ADSL/ADSL2/ADSL2+ standards supports only ATM encapsulation.
If the configured data path mode is different from the mode supported by the physical line, the activation of the line is ensured preferentially. The board adapts to the mode automatically.
For example, if the ADSL mode is configured as the transmission mode in the bound line profile whereas PTM is configured in the channel profile, the system does not determine the mode and the user is not prompted with any messages. The system sends the data to the board for the board to adapt to the mode automatically. The activation of the line is ensured preferentially.Minimum impulse noise protection
- Minimum impulse noise protection downstream
- Minimum impulse noise protection upstream
- INP defines how many DMT consecutive symbols can be protected. That is, when
de-interleaving, how many consecutive error DMT symbols in a specified byte can
be rectified. The upstream and downstream INP is set separately. The options for
symbol length are: no protection, a half symbol, a single symbol, two
symbols......sixteen symbols.
- 1: no protection
- 2: half symbol
- 3: single symbol
- 4: two symbols
- 5: three symbols
- 6: four symbols
- 7: five symbols
- 8: six symbols
- 9: seven symbols
- 10: eight symbols
- 11: nine symbols
- 12: ten symbols
- 13: eleven symbols
- 14: twelve symbols
- 15: thirteen symbols
- 16: fourteen symbols
- 17: fifteen symbols
- 18: sixteen symbols
- INP is defined as the protected consecutive DMT symbols but not the impulse noise duration. The impulse noise duration is related to DMS symbol ratio.
- There are multiple VDSL2 profiles. The DMT bit rate of a 30a profile is 8000 DMT symbols per second and that of other profiles is 4000 DMT symbols per second. For example, if INP is 16, the consecutive impulse noise of 16 * 1/4000 = 4 ms in an 8a profile and the consecutive impulse noise of 16 * 1/ 000 = 2 ms in a 30a profile can be protected.
Interleaving delay parameters
- Maximum interleaving delay downstream
- Maximum interleaving delay upstream
The interleaved delay refers to the delay caused by interleave processing. The upstream interleaved delay and the downstream interleaved delay are set separately. Interleaved delay is related to interleaved depth, bit length and line rate. Unit: ms. Range: 0-255, 201-254 are reserved.
By default, VDSL2 works in interleaved mode.Parameters for rate
- Minimum transmit rate downstream
- Minimum reserved transmit rate downstream
- Maximum transmit rate downstream
- Minimum transmit rate upstream
- Minimum reserved transmit rate upstream
- Maximum transmit rate upstream
- Minimum data rate in low power state
- The ratio between L2 minimum rate and L0 rate
- Maximum data rate in low power state
- Maximum/Minimum transmit rate upstream/downstream: indicates the maximum/minimum activation rate in the upstream/downstream direction. The actual line activation rate is autonegotiated within the configured rate range. Finally a rate which meets the activation requirements, with bit error rate smaller than 10 -7 and noise margin close to the target signal to noise ratio (SNR) margin, is used to activate lines. When the adaptation mode for transmission rate in a channel profile is fixed, the maximum activation rate must be the same as the minimum rate in the same direction. When the rate adaptation mode is not fixed, the maximum rate must be larger than the minimum rate.
- Minimum reserved transmit rate downstream/upstream: indicates the minimum reserved rate in the downstream/upstream direction. The minimum reserved rate must be greater than or equal to the minimum rate and smaller than or equal to the maximum rate. When the transmission rate is autonegotiated, the rate is adjusted according to this value. According to G.993.2 standards, this parameter is not supported.
- Minimum/Maximum data rate in low power state indicates the maximum/minimum data rate in lower power state. The ratio between L2 minimum rate and L0 rate indicates the ratio of the rate in low power state to that in normal state. The default ratio is 0, indicating that min-rate-lowpower restrictions are used. Otherwise, the minimum rate in low power is L0 multiplied by the ratio.
Rate threshold downshift upstream/downstream Indicates the downshift adaptation threshold of the upstream/downstream rate.
When the adaptation mode of the transmission rate is defined as the self-adaptation mode in the line profile, the system generates an alarm if the downshift adapted value of the upstream/downstream rate exceeds this value.Rate threshold upshift upstream/downstream Indicates the upshift adaptation threshold of the upstream/downstream rate.
When the adaptation mode of the transmission rate is defined as the self-adaptation mode in the line profile, the system generates an alarm if the upshift adapted value of the upstream/downstream rate exceeds this value.Retransmission control in upstream/downstream Indicates the retransmission function in the upstream/downstream direction. Erasure decoding switch Indicates the erasure decoding switch.
Erasure decoding enhances the impulse noise protection (INP) capability.This function must be supported by the in-service terminal.- When the function is disabled, the INP capability is not affected. The INP value is calculated by using the original formula.
- When the function is enabled, the INP capability is enhanced. The INP value is calculated by the xDSL transceiver unit at remote end (xTU-R). The calculated INP value is 1.8 times greater than the original value.
SOS bit rate in upstream/downstream Indicates the SOS bit rate in the upstream/downstream direction.The SOS data rate is the minimum transmission rate that can be ensured by a bearer channel in the case that the line does not go offline. This function requires the cooperation of a terminal. Maximum/Minimum expected throughput upstream/downstream Indicates the maximum/minimum expected throughput rate (RTR) during the retransmission. Maximum/Minimum delay upstream/downstream Indicates the maximum/minimum delay during the retransmission. Maximum net data rate upstream/downstream Indicates the maximum net data rate (NDR) during the retransmission.
When ports are activated in ATM mode, Maximum net data rate must be greater than 424 kbit/s. When ports are activated in PTM mode, Maximum net data rate must be greater than 520 kbit/s.Minimum impulse noise protection against single high impulse noise event upstream/downstream Indicates the minimum INP against the single high impulse noise event (SHINE). Minimum impulse noise protection against single high impulse noise event transported over DMT symbols with a subcarrier spacing of 8.625kHz upstream/downstream Indicates the minimum INP against the SHINE transported over DMT symbols with a sub-carrier spacing of 8.625 kHz. Minimum impulse noise protection against repetitive electrical impulse noise upstream/downstream Indicates the minimum INP against the repetitive electrical impulse noise (REIN). Minimum impulse noise protection against repetitive electrical impulse noise transported over DMT symbols with a subcarrier spacing of 8.625kHz upstream/downstream Indicates the minimum INP against REIN transported over DMT symbols with a sub-carrier spacing of 8.625 kHz. Single high impulse noise event ratio upstream/downstream Indicates the SHINE. This parameter is generally set based on the actual requirement because the environment where the single impulse noise occurs is unpredictable. Repetitive electrical impulse noise inter-arrival time upstream/downstream Indicates the REIN inter-arrival time.- 0: indicates the internal of the 100 Hz REIN.
- 1: indicates the internal of the 120 Hz REIN.
Will you set channel initialization policy selection Indicates whether to set the channel initialization policy. Channel initialization policy selection Indicates the channel initialization policy. The range is 0-2 and the default value is 0.
- 0: indicates that the rate is prioritized.
- 1: indicates that the INP is prioritized.
- 2: indicates that the SNR is set to larger when the rate meets the requirement.
Will you set maximum delay variation Indicates the variation range of the maximum delay. Maximum delay variation Indicates the variation range of the maximum delay, namely, the maximum value in the case of line re-configuration (OLR).
Numeral type. Range:1-255.
Unit: 0.1ms.
Default value: 255.Will you set memory percent Sets the maximum interleaving memory percentage. Memory percent Indicates the MAXDELAYOCTET-split. Value range: 0-100, 255. Valid values: 5-95. Default value:255.Unit: percentage.- 1-4, 96-99, 255: The MAXDELAYOCTET-split is configured by the vendor.
- 0: This value is valid only when the downstream maximum interleave delay is S1 (fast channel) and the retransmission function is disabled in the downstream direction.
- 100: This value is valid only when the upstream maximum interleave delay is S1 (fast channel) and the retransmission function is disabled in the upstream direction.
- For more information about the error message that the system displays against a command entered with incorrect syntax.
MORE BLOG:
No comments:
Post a Comment