CN107666354B - Power control method and system, optical line terminal and optical network unit - Google Patents
Power control method and system, optical line terminal and optical network unit Download PDFInfo
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- CN107666354B CN107666354B CN201610601367.8A CN201610601367A CN107666354B CN 107666354 B CN107666354 B CN 107666354B CN 201610601367 A CN201610601367 A CN 201610601367A CN 107666354 B CN107666354 B CN 107666354B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/564—Power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/572—Wavelength control
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Abstract
The invention discloses a power control method and system, an optical line terminal and an optical network unit, and relates to the technical field of optical fiber communication. The method of the invention comprises the following steps: the optical line terminal acquires the receiving power of the optical signal sent by the optical network unit in the wavelength channel, compares the receiving power of the optical signal of the optical network unit with a target parameter, and sends an adjusting command to the optical network unit with the receiving power not conforming to the target parameter, and the optical network unit adjusts the transmitting parameter of the optical signal according to the adjusting command. The invention controls the optical network unit to adjust the transmitting parameter through the optical line terminal, so that the power of the optical signal of each optical network unit received by the optical line terminal can be kept in a certain intensity range, the problem of misjudgment caused by different received signal strengths is solved, the accuracy of the judgment of the received signal by the optical line terminal is improved, in addition, the automatic gain control function is not needed at the optical line terminal side, and the realization difficulty of the receiving hardware of the optical line terminal is reduced.
Description
Technical Field
The present invention relates to the field of optical fiber communication technologies, and in particular, to a power control method and system, an optical line terminal, and an optical network unit.
Background
In a deployment application of Passive Optical Network (PON) technology in an existing Network, a Passive Optical Network includes an Optical Line Terminal (OLT) installed in a central control station, and a plurality of Optical Network Units (ONUs) installed in a user site. In the uplink communication process, the positions of the ONUs are different from the external environment, so that the optical signals of the ONUs received by the OLT side have strong or weak intensity. This will bring higher difficulty to the signal decision at the OLT side, so that the OLT is prone to generate misjudgment of signals.
In order to solve the above problem, in the prior art, a receiver on the OLT side has an Automatic Gain Control (AGC) function, that is, in a conventional EPON (Ethernet Passive optical network) or GPON (Gigabit-Capable PON), a smaller voltage value converted from a received optical signal is generally amplified, or is automatically adjusted according to the voltage value when a signal is determined, so as to ensure correct determination of the signal.
Disclosure of Invention
The invention provides a new power control method to solve the problem of misjudgment caused by different signal strengths of all optical network units received by an optical line terminal.
According to an aspect of the present invention, there is provided a power control method, including: the optical line terminal acquires the receiving power of an optical signal sent by an optical network unit in a wavelength channel; the optical line terminal compares the receiving power of the optical signal of the optical network unit with a target parameter; and the optical line terminal sends an adjusting command to the optical network unit with the receiving power not meeting the target parameter so that the optical network unit adjusts the transmitting parameter of the optical signal according to the adjusting command.
In one embodiment, the optical line terminal calculates the average value of the received power of the optical signal of each optical network unit, and sets the average value of the received power as a target parameter; or, the optical line terminal sets a preset value of the received power as a target parameter.
In one embodiment, the sending, by the optical line terminal, the adjustment command to the optical network unit whose received power does not meet the target parameter includes: and the optical line terminal sends an adjusting command to the optical network unit of which the difference between the receiving power and the target parameter exceeds a preset range according to the comparison result.
In one embodiment, the optical line terminal calculates a target transmission parameter value of the optical network unit according to the receiving power of the optical signal and the target parameter, and carries the target transmission parameter value in the adjustment command, so that the optical network unit adjusts the transmission parameter to the target transmission parameter value; or the optical line terminal calculates the transmission parameter adjustment direction and the transmission parameter adjustment value of the optical network unit according to the receiving power and the target parameter of the optical signal, and carries the transmission parameter adjustment direction and the transmission parameter adjustment value in the adjustment command, so that the optical network unit adjusts the transmission parameter of the optical signal according to the transmission parameter adjustment direction and the transmission parameter adjustment value; or the optical line terminal calculates the transmission parameter adjustment direction and the transmission parameter adjustment step length of the optical network unit according to the receiving power and the target parameter of the optical signal, and the adjustment command carries the transmission parameter adjustment direction and the transmission parameter adjustment step length, so that the optical network unit adjusts the transmission parameter of the optical signal according to the transmission parameter adjustment direction and the transmission parameter adjustment step length until the transmission parameter meets the target parameter.
In one embodiment, the transmission parameters include: emission power and/or emission wavelength.
According to a second aspect of the present invention, there is provided a power control method, comprising: an optical network unit receives an adjusting command sent by an optical line terminal; and the optical network unit adjusts the transmission parameters of the optical signals according to the adjusting commands.
In one embodiment, the adjustment command includes a target transmission parameter value; the optical network unit adjusts the transmission parameter to a target transmission parameter value; or the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting value; the optical network unit adjusts the transmitting parameter of the optical signal according to the transmitting parameter adjusting direction and the transmitting parameter adjusting value; or the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting step length; and the optical network unit adjusts the transmission parameters of the optical signals according to the transmission parameter adjustment direction and the transmission parameter adjustment step length until the receiving power of the optical signals received by the optical line terminal meets the target parameters.
According to a third aspect of the present invention, there is provided an optical line terminal comprising: the receiving power acquisition module is used for acquiring the receiving power of the optical signal sent by the optical network unit in the wavelength channel; the comparison module is used for comparing the receiving power of the optical signal of the optical network unit with the target parameter; and the adjusting command sending module is used for sending an adjusting command to the optical network unit with the receiving power not meeting the target parameter so that the optical network unit can adjust the transmitting parameter of the optical signal according to the adjusting command.
In one embodiment, the optical line terminal further comprises: the target parameter setting module is used for calculating the average value of the receiving power of the optical signals of each optical network unit and setting the average value of the receiving power as a target parameter; or, for setting the received power preset value as a target parameter.
In an embodiment, the adjustment command sending module is configured to send an adjustment command to an optical network unit whose difference between the received power and the target parameter exceeds a preset range according to the comparison result.
In one embodiment, the adjusting command sending module is configured to calculate a target transmission parameter value of the optical network unit according to the received power of the optical signal and the target parameter, and carry the target transmission parameter value in the adjusting command, so that the optical network unit adjusts the transmission parameter to the target transmission parameter value; or, the adjusting command sending module is configured to calculate a transmission parameter adjusting direction and a transmission parameter adjusting value of the optical network unit according to the receiving power of the optical signal and the target parameter, and carry the transmission parameter adjusting direction and the transmission parameter adjusting value in the adjusting command, so that the optical network unit adjusts the transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting value; or, the adjusting command sending module is configured to calculate a transmission parameter adjusting direction and a transmission parameter adjusting step length of the optical network unit according to the receiving power of the optical signal and the target parameter, and carry the transmission parameter adjusting direction and the transmission parameter adjusting step length in the adjusting command, so that the optical network unit adjusts the transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting step length until the transmission parameter meets the target parameter.
In one embodiment, the transmission parameters include: emission power and/or emission wavelength.
According to a fourth aspect of the present invention, there is provided an optical network unit, comprising: the adjusting command optical signal receiving module is used for receiving an adjusting command sent by the optical line terminal; and the transmission parameter adjusting module is used for adjusting the transmission parameters of the optical signals according to the adjusting command.
In one embodiment, the adjustment command includes a target transmission parameter value; the transmission parameter adjusting module is used for adjusting the transmission parameters to target transmission parameter values; or the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting value; the transmission parameter adjusting module is used for adjusting the transmission parameters of the optical signals according to the transmission parameter adjusting direction and the transmission parameter adjusting value; or the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting step length; and the transmission parameter adjusting module is used for adjusting the transmission parameters of the optical signals according to the transmission parameter adjusting direction and the transmission parameter adjusting step length until the receiving power of the optical signals received by the optical line terminal meets the target parameters.
According to a fifth aspect of the present invention, there is provided a power control system comprising: an optical line terminal in any of the preceding embodiments and an optical network unit in any of the preceding embodiments.
The invention controls the optical network unit to adjust the emission parameter through the optical line terminal according to the intensity of the optical signal of the received optical network unit, so that the power of the optical signal of each optical network unit received by the optical line terminal can be kept in a certain intensity range, the problem of misjudgment caused by different intensities of the received signal is improved, the accuracy of the judgment of the optical line terminal on the received signal is improved, in addition, the automatic gain control function is not needed at the optical line terminal side, and the realization difficulty of the receiving hardware of the optical line terminal is reduced.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a flow diagram of a power control method according to an embodiment of the invention.
Fig. 2 shows a schematic diagram of a power control method of another embodiment of the present invention.
Fig. 3 is a flow chart illustrating a power control method according to an application example of the present invention.
Fig. 4 shows a schematic diagram of an OLT receive response curve of an application example of the present invention.
Fig. 5 shows a schematic structural diagram of an optical line terminal according to an embodiment of the present invention.
Fig. 6 shows a schematic structural diagram of an optical network unit according to an embodiment of the present invention.
Fig. 7 shows a schematic structural diagram of a power control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a new power control method in a passive optical network, which is used for ensuring the accuracy of the judgment of a received signal of an optical network unit by an optical line terminal.
The method of power control of the present invention is described below with reference to fig. 1 to 4.
Fig. 1 is a flow chart of an embodiment of a power control method of the present invention. As shown in fig. 1, the method of this embodiment includes:
step S102, the optical line terminal obtains the receiving power of the optical signal sent by the optical network unit in the wavelength channel.
In the same wavelength channel, the optical line terminal receives optical signals sent by a plurality of optical network units.
Step S104, the optical line terminal compares the receiving power of the optical signal of the optical network unit with the target parameter.
Wherein different target parameters can be set for the received power of the optical network unit according to requirements. As an example, the optical line terminal calculates an average value of the received power of the optical signal of each optical network unit, and sets the average value of the received power as a target parameter; as another example, the optical line terminal sets a preset value of the reception power as a target parameter.
Step S106, the optical line terminal sends an adjusting command to the optical network unit whose receiving power does not accord with the target parameter.
When the optical line terminal sets the average value of the received power as a target parameter, the optical line terminal compares the received power of the optical signal of each optical network unit with the average value respectively, and if the difference between the received power of the optical network unit and the average value exceeds a preset range, the optical line terminal sends an adjusting command to the optical network unit. This example is suitable for the case where the received power difference of each optical network unit is large, but the average value is high. When the preset value of the receiving power is set as a target parameter by the optical line terminal, the optical line terminal respectively compares the receiving power of the optical signal of each optical network unit with the preset value, and if the difference between the receiving power of the optical network unit and the preset value exceeds a preset range, the optical line terminal sends an adjusting command to the optical network unit. The example can ensure that the intensity of the signal received by the optical line terminal is within a certain preset range.
And step S108, the optical network unit adjusts the transmission parameters of the optical signals according to the adjusting command.
The adjustment command is sent through a specific frame in an OAM (Operation & Administration & Management) message in the EPON, or sent through a specific frame in a PLOAM (Physical layer OAM) message in the GPON, for example.
The optical line terminal can carry different information in the adjustment command according to different requirements.
As an example, the optical line terminal calculates a target transmission parameter value of the optical network unit according to the received power of the optical signal and the target parameter, and the optical network unit adjusts the transmission parameter to the target transmission parameter value when the adjustment command carries the target transmission parameter value.
As another example, the olt calculates a transmission parameter adjustment direction and a transmission parameter adjustment value of the onu according to the received power of the optical signal and the target parameter, and carries the transmission parameter adjustment direction and the transmission parameter adjustment value in the adjustment command, and the onu adjusts the transmission parameter of the optical signal according to the transmission parameter adjustment direction and the transmission parameter adjustment value.
As another example, the optical line terminal calculates a transmission parameter adjustment direction and a transmission parameter adjustment step size of the optical network unit according to the received power of the optical signal and the target parameter, and carries the transmission parameter adjustment direction and the transmission parameter adjustment step size in the adjustment command, and the optical network unit dynamically adjusts the transmission parameter of the optical signal according to the transmission parameter adjustment direction and the transmission parameter adjustment step size until the received power of the optical signal received by the optical line terminal meets the target parameter.
In the above three examples, the optical line terminal calculates the adjustment value of the transmission parameter in the adjustment command, for example, by using the received power response curve. The emission parameters include emission power and/or emission wavelength. How the optical network unit adjusts the transmission parameter may be determined according to the adjustment capability of the optical network unit and the wavelength range of the wavelength channel, for example, the adjustment value of the transmission power may only adjust the transmission power within the power adjustment range of the optical network unit, or the adjustment value of the transmission wavelength may only adjust the transmission wavelength within the wavelength adjustment range of the optical network unit and within the wavelength range of the wavelength channel, or the transmission power or the transmission wavelength may be adjusted at the same time when one of the adjustment value of the transmission power and the adjustment value of the transmission wavelength exceeds the adjustment range of the optical network unit. The optical line terminal may know the wavelength adjustment range and the power adjustment range of each optical network unit in advance.
In the above embodiment, the optical line terminal controls the optical network units to adjust the transmission parameters thereof according to the intensity of the optical signals received by the optical network units, so that the power of the optical signals of each optical network unit received by the optical line terminal can be kept within a certain intensity range, the problem of misjudgment caused by different intensities of the received signals is solved, the accuracy of the judgment of the optical line terminal on the received signals is improved, in addition, the automatic gain control function is not required at the optical line terminal side, and the difficulty in implementing the receiving hardware of the optical line terminal is reduced.
The method of the invention can be independently implemented, and can also be combined with the automatic gain function of the optical line terminal, as shown in fig. 2, the receiving power response curve of 4 ONUs received by the OLT before adjustment is as the left curve graph in the figure, according to the preset value P0 (as the right curve in the figure), the OLT informs the 4 ONUs to adjust the wavelength, so that the difference between the receiving power of the 4 ONUs and the preset value P0 is reduced to a certain range, then the voltage of the optical signal reaches the OLT side after amplitude limiting and amplification is basically consistent, and then the signal judgment can ensure the judgment accuracy.
The embodiment further ensures the accuracy of the received signal judgment of the optical line terminal, and simultaneously reduces the high dynamic range requirement on a limiting amplifier or a digital judgment level when AGC is realized by a hardware mode originally, thereby simplifying the structural design of the receiver at the optical line terminal side and reducing the performance index requirement on hardware.
One application of the present invention is described below in conjunction with fig. 3 and 4.
Fig. 3 is a flowchart of an application example of the power control method of the present invention. Fig. 4 is a schematic diagram of a receiving response curve of the optical line terminal according to the present invention. As shown in fig. 3 and 4, ONU1, ONU2, ONU3, and ONU4 all operate in wavelength channel a, and the wavelength range of wavelength channel a is [ a [0-f,A0+f]. The central wavelength of the optical signals of ONU1, ONU2, ONU3, and ONU4 reaching the OLT is λ1、λ2、λ3、λ4。
In step S302, the OLT receives the optical signals of the respective ONUs, and calculates an average value of the received powers of the respective optical signals.
As shown in fig. 4, the OLT receiver detects that the reception powers of the optical signals of ONU1, ONU2, ONU3, and ONU4 are P, respectively1、P2、P3、P4And calculates the received power P1、P2、P3、P4Is calculated to obtain a mean value P0。
Step S304, OLT receives power average value P according to response curve0And determining the adjustment scheme of each ONU according to the original receiving power of each ONU.
OLT receives power average value P according to response curve0And raw received power P of ONU11Determining the adjustment direction of the emission wavelength of the ONU1 as 'increasing', the adjustment value as 'delta 1',the direction of the adjustment of the transmitting power is increased, and the adjustment value is 3 dBm; the OLT responds to the curve by the original center wavelength lambda of the ONU22Determining that the direction of the ONU2 emission wavelength adjustment is 'minus', the adjustment value is 'delta 2', and the emission power is unchanged; OLT average power value P0Determining that the ONU3 adjusts the transmission power to P0The emission wavelength is unchanged; OLT according to response curve, average power value P0And raw received power P of ONU44Determining that the direction of the ONU4 transmission wavelength adjustment is 'minus', the adjustment step is delta, the direction of the transmission power adjustment is 'plus', and the adjustment step is P.
In step S306, the OLT issues an adjustment command to each ONU.
The OLT issues the adjustment command with reference to tables 1 to 4.
The OLT issues an adjustment command to the ONU 1:
| ONU ID | ONU1 |
| type of command | Wavelength and power adjustment |
| Wavelength adjustment direction | Increase |
| Adjustment value | Δ1 |
| Direction of power regulation | Increase |
| Adjustment value | 3dBm |
TABLE 1
The OLT issues an adjustment command to the ONU 1:
| ONU ID | ONU2 |
| type of command | Wavelength tuning |
| Wavelength adjustment direction | Reducing |
| Adjustment value | Δ2 |
| Direction of power regulation | Is not changed |
| Adjustment value | 0 |
TABLE 2
The OLT issues an adjustment command to the ONU 3:
| ONU ID | ONU3 |
| type of command | Power regulation |
| Target power adjustment value | P0 |
TABLE 3
The OLT issues an adjustment command to the ONU 4:
| ONU ID | ONU4 |
| type of command | Wavelength and power adjustment |
| Wavelength adjustment direction | Reducing |
| Adjustment value | Δ |
| Direction of power regulation | Reducing |
| Adjustment value | PdBm |
TABLE 4
And step S308, each ONU adjusts corresponding transmission parameters according to the adjusting command.
The ONU4 may need to perform multiple adjustments, and each OLT determines whether the next adjustment is needed according to the adjusted reception power of the ONU 4.
In the above embodiment, to illustrate a plurality of adjustment situations, different adjustment schemes are determined for different ONUs, and in practical application, the determination may be performed according to the adjustment capability and the actual situation of the ONUs, and only the transmission power or the transmission wavelength may be adjusted or adjusted simultaneously.
The present invention also provides an optical line terminal, which is described below with reference to fig. 5.
Fig. 5 is a schematic structural diagram of an embodiment of the optical line terminal of the present invention. As shown in fig. 5, the optical line terminal 50 includes:
a received power obtaining module 502, configured to obtain received power of an optical signal sent by an optical network unit in a wavelength channel.
The comparing module 504 is configured to compare the received power of the optical signal of the onu with the target parameter.
And an adjusting command sending module 506, configured to send an adjusting command to the optical network unit whose receiving power does not meet the target parameter, so that the optical network unit adjusts the transmission parameter of the optical signal according to the adjusting command.
The adjusting command sending module 506 is configured to send an adjusting command to the onu whose difference between the received power and the target parameter exceeds the preset range according to the comparison result.
Wherein, different target parameters can be set according to different requirements. In one embodiment, the optical line terminal 50 may further include: the target parameter setting module 503 is configured to calculate an average value of the received power of the optical signal of each optical network unit, and set the average value of the received power as a target parameter, or the target parameter setting module 503 is configured to set a preset value of the received power as a target parameter.
When the target parameter setting module 503 sets the average received power value as the target parameter, the comparing module 504 is configured to compare the average received power values with the received power values of the optical signals of the optical network units, respectively; and an adjustment command sending module 506, configured to send an adjustment command to the optical network unit whose difference between the received power and the average received power exceeds the preset range according to the comparison result. When the target parameter setting module 503 sets the preset value of the received power as the target parameter, the comparing module 504 is configured to compare the received power of the optical signal of each optical network unit with the preset value of the received power respectively; and an adjustment command sending module 506, configured to send an adjustment command to the optical network unit whose difference between the received power and the preset received power value exceeds the preset range according to the comparison result.
The adjustment command sending module 506 may send the adjustment command according to different situations, where the adjustment command includes different contents. As an example, the adjusting command sending module 506 is configured to calculate a target transmission parameter value of the optical network unit according to the received power of the optical signal and the target parameter, and carry the target transmission parameter value in the adjusting command, so that the optical network unit adjusts the transmission parameter to the target transmission parameter value. As another example, the adjusting command sending module 506 is configured to calculate a transmission parameter adjusting direction and a transmission parameter adjusting value of the onu according to the received power of the optical signal and the target parameter, and carry the transmission parameter adjusting direction and the transmission parameter adjusting value in the adjusting command, so that the onu adjusts the transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting value. As another example, the adjusting command sending module 506 is configured to calculate a transmission parameter adjusting direction and a transmission parameter adjusting step length of the onu according to the received power of the optical signal and the target parameter, and carry the transmission parameter adjusting direction and the transmission parameter adjusting step length in the adjusting command, so that the onu adjusts the transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting step length until the transmission parameter meets the target parameter. Wherein the transmission parameters include: emission power and/or emission wavelength.
The present invention also provides an optical network unit, which is described below with reference to fig. 6.
Fig. 6 is a schematic structural diagram of an optical network unit according to an embodiment of the present invention. As shown in fig. 6, the optical network unit 60 includes:
an adjustment command receiving module 602, configured to receive an adjustment command sent by the optical line terminal.
And a transmission parameter adjusting module 604, configured to adjust a transmission parameter of the optical signal according to the adjustment command.
As an example, the adjustment command includes a target transmission parameter value; a transmission parameter adjusting module 604, configured to adjust the transmission parameter to the target transmission parameter value. As another example, the adjustment command includes a transmission parameter adjustment direction and a transmission parameter adjustment value; the transmission parameter adjusting module 604 is configured to adjust a transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting value. As yet another example, the adjustment command includes a transmit parameter adjustment direction and a transmit parameter adjustment step size; the transmission parameter adjusting module 604 is configured to adjust a transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting step length until the receiving power of the optical signal received by the optical line terminal meets a target parameter.
The present invention also provides a power control system, as shown in fig. 7, the system 70 includes the optical line terminal 50 in any of the foregoing embodiments and the optical network unit 60 in any of the foregoing embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (11)
1. A method of power control, comprising:
the optical line terminal acquires the receiving power of an optical signal sent by an optical network unit in a wavelength channel;
the optical line terminal compares the receiving power of the optical signal of the optical network unit with a target parameter; the optical line terminal calculates the average value of the received power of the optical signal of each optical network unit, and sets the average value of the received power as a target parameter;
the optical line terminal sends an adjusting command to the optical network unit with the receiving power not conforming to the target parameter so that the optical network unit adjusts the transmitting parameter of the optical signal according to the adjusting command;
wherein the transmission parameters include: and the optical line terminal determines that the optical network unit adjusts the transmitting power or adjusts the transmitting wavelength or adjusts the transmitting power and the transmitting wavelength simultaneously according to the adjusting capability of the optical network unit and the wavelength range of the wavelength channel.
2. The method of claim 1,
the optical line terminal sending an adjustment command to the optical network unit with the receiving power not meeting the target parameter comprises the following steps:
and the optical line terminal sends an adjusting command to the optical network unit of which the difference between the receiving power and the target parameter exceeds a preset range according to the comparison result.
3. The method of claim 1,
the optical line terminal calculates a target transmission parameter value of the optical network unit according to the receiving power of the optical signal and the target parameter, and the adjustment command carries the target transmission parameter value so that the optical network unit adjusts the transmission parameter to the target transmission parameter value;
alternatively, the first and second electrodes may be,
the optical line terminal calculates the transmission parameter adjusting direction and the transmission parameter adjusting value of the optical network unit according to the receiving power and the target parameter of the optical signal, and the adjusting command carries the transmission parameter adjusting direction and the transmission parameter adjusting value, so that the optical network unit adjusts the transmission parameter of the optical signal according to the transmission parameter adjusting direction and the transmission parameter adjusting value;
alternatively, the first and second electrodes may be,
the optical line terminal calculates the transmission parameter adjustment direction and the transmission parameter adjustment step length of the optical network unit according to the receiving power and the target parameter of the optical signal, and the adjustment command carries the transmission parameter adjustment direction and the transmission parameter adjustment step length, so that the optical network unit adjusts the transmission parameter of the optical signal according to the transmission parameter adjustment direction and the transmission parameter adjustment step length until the transmission parameter meets the target parameter.
4. A method of power control, comprising:
an optical network unit receives an adjusting command sent by an optical line terminal; the adjusting command is sent by comparing the receiving power of the optical signal of the optical network unit with a target parameter by the optical line terminal; the optical line terminal calculates the average value of the received power of the optical signal of each optical network unit, and sets the average value of the received power as a target parameter;
the optical network unit adjusts the transmitting parameter of the optical signal according to the adjusting command;
wherein the transmission parameters include: and the optical line terminal determines that the optical network unit adjusts the transmitting power or adjusts the transmitting wavelength or adjusts the transmitting power and the transmitting wavelength simultaneously according to the adjusting capability of the optical network unit and the wavelength range of the wavelength channel.
5. The method of claim 4,
the adjustment command comprises a target transmission parameter value; the optical network unit adjusts the transmission parameter to a target transmission parameter value;
alternatively, the first and second electrodes may be,
the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting value; the optical network unit adjusts the transmitting parameter of the optical signal according to the transmitting parameter adjusting direction and the transmitting parameter adjusting value;
alternatively, the first and second electrodes may be,
the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting step length; and the optical network unit adjusts the transmission parameters of the optical signals according to the transmission parameter adjustment direction and the transmission parameter adjustment step length until the receiving power of the optical signals received by the optical line terminal meets the target parameters.
6. An optical line terminal, comprising:
the receiving power acquisition module is used for acquiring the receiving power of the optical signal sent by the optical network unit in the wavelength channel;
the comparison module is used for comparing the receiving power of the optical signal of the optical network unit with the target parameter;
an adjustment command sending module, configured to send an adjustment command to an optical network unit whose received power does not meet a target parameter, so that the optical network unit adjusts a transmission parameter of an optical signal according to the adjustment command, where the transmission parameter includes: the adjusting command sending module is used for determining that the optical network unit adjusts the transmitting power, or adjusts the transmitting wavelength, or simultaneously adjusts the transmitting power and the transmitting wavelength according to the adjusting capability of the optical network unit and the wavelength range of the wavelength channel;
and the target parameter setting module is used for calculating the average value of the receiving power of the optical signals of each optical network unit and setting the average value of the receiving power as a target parameter.
7. The optical line terminal according to claim 6,
and the adjusting command sending module is used for sending an adjusting command to the optical network unit of which the difference between the received power and the target parameter exceeds the preset range according to the comparison result.
8. The optical line terminal according to claim 6,
the adjusting command sending module is used for calculating a target transmitting parameter value of the optical network unit according to the receiving power of the optical signal and the target parameter, and the adjusting command carries the target transmitting parameter value so that the optical network unit can adjust the transmitting parameter to the target transmitting parameter value;
alternatively, the first and second electrodes may be,
the adjusting command sending module is used for calculating a transmitting parameter adjusting direction and a transmitting parameter adjusting value of the optical network unit according to the receiving power and the target parameter of the optical signal, and the adjusting command carries the transmitting parameter adjusting direction and the transmitting parameter adjusting value so that the optical network unit can adjust the transmitting parameter of the optical signal according to the transmitting parameter adjusting direction and the transmitting parameter adjusting value;
alternatively, the first and second electrodes may be,
the adjusting command sending module is used for calculating the transmitting parameter adjusting direction and the transmitting parameter adjusting step length of the optical network unit according to the receiving power of the optical signal and the target parameter, and the adjusting command carries the transmitting parameter adjusting direction and the transmitting parameter adjusting step length so that the optical network unit can adjust the transmitting parameter of the optical signal according to the transmitting parameter adjusting direction and the transmitting parameter adjusting step length until the transmitting parameter meets the target parameter.
9. An optical network unit, comprising:
the adjusting command optical signal receiving module is used for receiving an adjusting command sent by the optical line terminal; the adjusting command is sent by comparing the receiving power of the optical signal of the optical network unit with a target parameter by the optical line terminal; the optical line terminal calculates the average value of the received power of the optical signal of each optical network unit, and sets the average value of the received power as a target parameter;
a transmission parameter adjusting module, configured to adjust a transmission parameter of the optical signal according to the adjustment command, where the transmission parameter includes: and the optical line terminal determines that the optical network unit adjusts the transmitting power or adjusts the transmitting wavelength or adjusts the transmitting power and the transmitting wavelength simultaneously according to the adjusting capability of the optical network unit and the wavelength range of the wavelength channel.
10. The optical network unit of claim 9,
the adjustment command comprises a target transmission parameter value; the transmission parameter adjusting module is used for adjusting the transmission parameters to target transmission parameter values;
alternatively, the first and second electrodes may be,
the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting value; the transmission parameter adjusting module is used for adjusting the transmission parameters of the optical signals according to the transmission parameter adjusting direction and the transmission parameter adjusting value;
alternatively, the first and second electrodes may be,
the adjusting command comprises a transmitting parameter adjusting direction and a transmitting parameter adjusting step length; and the transmission parameter adjusting module is used for adjusting the transmission parameters of the optical signals according to the transmission parameter adjusting direction and the transmission parameter adjusting step length until the receiving power of the optical signals received by the optical line terminal meets the target parameters.
11. A power control system comprising an optical line terminal according to any of claims 6 to 8 and an optical network unit according to claim 9 or 10.
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| TWI674772B (en) * | 2018-03-02 | 2019-10-11 | 和碩聯合科技股份有限公司 | Correction method for photoelectric transmission power |
| CN111385053B (en) * | 2018-12-29 | 2022-11-08 | 中兴通讯股份有限公司 | Data transmitting and receiving, wavelength configuration method and device, wireless access system and storage medium |
| EP4236349A3 (en) * | 2019-02-20 | 2023-10-25 | Huawei Technologies Co., Ltd. | Communication in passive optical networks (pons) related to digital signal processing for optical signal (odsp) |
| CN113055097B (en) * | 2019-12-27 | 2024-05-14 | 中兴通讯股份有限公司 | Coherent reception method, signal processing method and system |
| CN114245243B (en) * | 2021-12-23 | 2023-07-07 | 四川天邑康和通信股份有限公司 | PON gateway received light power automatic adjusting method |
| CN114389702A (en) * | 2022-01-17 | 2022-04-22 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN114389701A (en) * | 2022-01-17 | 2022-04-22 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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