CN113727218A - Method for setting length of static window and related equipment - Google Patents

Method for setting length of static window and related equipment Download PDF

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Publication number
CN113727218A
CN113727218A CN202010450430.9A CN202010450430A CN113727218A CN 113727218 A CN113727218 A CN 113727218A CN 202010450430 A CN202010450430 A CN 202010450430A CN 113727218 A CN113727218 A CN 113727218A
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onu
static window
registered
static
length
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CN113727218B (en
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张德智
蒋铭
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

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  • Computer Networks & Wireless Communication (AREA)
  • Small-Scale Networks (AREA)

Abstract

The disclosure provides a method and a device for setting the length of a static window, an optical line terminal, a passive optical network and a computer readable storage medium, and relates to the technical field of optical communication. The method comprises the following steps: the optical line terminal OLT acquires the round-trip delay of each registered optical network unit ONU; the OLT determines the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU; and the OLT sets the length of a static window adopted by the registered ONU according to the maximum round-trip delay. The method and the device can dynamically set the corresponding static window length according to the actual optical fiber length when the ONU is deployed in the passive optical network, thereby effectively reducing the time delay and jitter of the uplink service transmission of the ONU while providing the ONU activation function.

Description

Method for setting length of static window and related equipment
Technical Field
The present disclosure relates to the field of optical communications technologies, and in particular, to a method and an apparatus for setting a length of a static window, an optical line terminal, a passive optical network, and a computer-readable storage medium.
Background
In an ONU (Optical Network Unit) registration activation state machine loop in a passive Optical Network protocol of an international telecommunication union, telecommunication standard branch office, the ONU has 7 states, wherein an O2 state is a standby state, an O3 state is a serial number state, and an O4 state is a ranging state, and all three states require an OLT (Optical Line Terminal) to provide different static windows. In the time period of the static window, only the newly on-line ONU and the specified ranging ONU can report corresponding signaling messages, and normal data transmission of other normally working ONUs is inhibited, so that normal ONU data transmission can introduce corresponding time delay of at least the length of the static window.
Disclosure of Invention
The technical problem solved by the present disclosure is how to reduce the delay and jitter of ONU uplink service transmission while providing an ONU activation function.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for setting a static window length, including: the optical line terminal OLT acquires the round-trip delay of each registered optical network unit ONU; the OLT determines the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU; and the OLT sets the length of a static window adopted by the registered ONU according to the maximum round-trip delay.
In some embodiments, the OLT setting the static window length used by the registered ONU according to the maximum round-trip delay includes: the OLT adds the maximum round-trip delay to a first preset delay to obtain the lengths of static windows adopted by the registered ONU in an O2 state and an O3 state; and the OLT adds the maximum round-trip delay to a second preset delay to obtain the length of a static window adopted by the registered ONU in an O4 state, wherein the second preset delay is smaller than the first preset delay.
In some embodiments, the method further comprises: and the OLT sends a first static window indication message under the condition that the unregistered ONU does not exist in the ONU number list, wherein the first static window indication message carries the type identifier of the registered ONU static window.
In some embodiments, the method further comprises: the OLT sets the length of a static window adopted by the unregistered ONU according to the length of a standard static window under the condition that the unregistered ONU exists in the ONU number list; the OLT sends a first static window indication message and a second static window indication message, wherein the first static window indication message carries the type identifier of the registered ONU static window, and the second static window indication message carries the type identifier of the unregistered ONU static window.
In some embodiments, the method further comprises: the OLT sets the ratio of the registered ONU static window to the unregistered ONU static window.
In some embodiments, the method further comprises: the OLT receives a static window response message sent by the unregistered ONU; the OLT determines the round-trip delay of the unregistered ONU according to the static window response message; and after the unregistered ONU finishes the first registration, the OLT sends an ONU management control interface message to the ONU which is registered for the first time, and the identity of the ONU which is registered for the first time is set as the registered ONU.
In some embodiments, the method further comprises: the ONU detects the identity information stored by the ONU so as to determine the identity of the ONU; identifying and responding to the first static window indication message under the condition that the ONU is the registered ONU; in the event that the ONU is an unregistered ONU, identifying and responding to the second static window indication message.
According to a second aspect of the embodiments of the present disclosure, there is provided an optical line terminal including: a round-trip delay acquisition module configured to acquire round-trip delays of the registered optical network units ONU; the maximum round-trip delay determining module is configured to determine the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU; and the static window length setting module is configured to set the static window length adopted by the registered ONU according to the maximum round-trip delay.
In some embodiments, the static window length setting module is configured to: adding the maximum round-trip delay to a first preset delay to obtain the lengths of static windows adopted by the registered ONU in an O2 state and an O3 state; and adding the maximum round-trip delay to a second preset delay to obtain the length of a static window adopted by the registered ONU in the O4 state, wherein the second preset delay is smaller than the first preset delay.
In some embodiments, the optical line terminal further comprises a first indication message sending module configured to: and sending a first static window indication message under the condition that the unregistered ONU does not exist in the ONU number list, wherein the first static window indication message carries the type identifier of the static window of the registered ONU.
In some embodiments, the static window length setting module is further configured to: setting the length of a static window adopted by the unregistered ONU according to the length of a standard static window under the condition that the unregistered ONU exists in the ONU number list; the optical line terminal further comprises a second indication message sending module configured to: and sending a first static window indication message and a second static window indication message, wherein the first static window indication message carries the type identifier of the registered ONU static window, and the second static window indication message carries the type identifier of the unregistered ONU static window.
In some embodiments, the optical line terminal further comprises a scale setting module configured to: setting the ratio of the registered ONU static window to the unregistered ONU static window.
In some embodiments, the optical line terminal further comprises: a response message receiving module configured to receive a static window response message sent by an unregistered ONU; a round-trip delay determining module configured to determine a round-trip delay of the unregistered ONU according to the static window response message; and the identity setting module is configured to send an ONU management control interface message to the ONU which is registered for the first time after the unregistered ONU finishes the first registration, and set the identity of the ONU which is registered for the first time as the registered ONU.
According to a third aspect of the embodiments of the present disclosure, there is provided a passive optical network including the foregoing optical line terminal and an ONU, wherein the ONU is configured to: detecting self-stored identity information to determine self-identity; identifying and responding to the first static window indication message under the condition that the ONU is the registered ONU; in the event that the ONU is an unregistered ONU, identifying and responding to the second static window indication message.
According to a fourth aspect of the embodiments of the present disclosure, there is provided an apparatus for setting a length of a static window of a passive optical network, including: a memory; and a processor coupled to the memory, the processor configured to perform the aforementioned method of setting a length of a static window of a passive optical network based on instructions stored in the memory.
According to a fifth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, in which computer instructions are stored, and when executed by a processor, implement the foregoing method for setting the passive optical network static window length.
The method and the device can dynamically set the corresponding static window length according to the actual optical fiber length when the ONU is deployed in the passive optical network, thereby effectively reducing the time delay and jitter of the uplink service transmission of the ONU while providing the ONU activation function.
Other features of the present disclosure 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 disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 shows a schematic diagram of a static window.
Fig. 2 illustrates a flow diagram of a method of setting a static window length in accordance with some embodiments of the present disclosure.
FIG. 3 is a flow chart illustrating a method for setting a static window length according to further embodiments of the present disclosure.
Figure 4 shows a schematic structural diagram of an optical line terminal according to some embodiments of the present disclosure.
Fig. 5 shows a schematic structural diagram of a passive optical network according to some embodiments of the present disclosure.
Fig. 6 shows a schematic structural diagram of an apparatus for setting a static window length according to some embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, 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 disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Fig. 1 shows a schematic diagram of a static window. As shown in fig. 1, the standard requires a static window length of 250us in the O2-O3 state and a static window length of 202us in the O4 state, and the static window length is set in the standard so as to be mainly based on a maximum optical fiber length of 20km between the OLT and the ONU. However, when a PON network is actually deployed, the length of the optical fiber between the OLT and the ONU is mostly less than 10km, and even mostly less than 5 km. Therefore, if the set parameters in the standard are still used in the deployment scenario for short distance, there is a large influence on the delay and jitter of the ONU uplink traffic transmission.
In view of the above, the present disclosure provides a method of setting a length of a static window.
Some embodiments of the method of the present disclosure for setting the length of a static window are first described in conjunction with fig. 2.
Fig. 2 illustrates a flow diagram of a method of setting a static window length in accordance with some embodiments of the present disclosure. As shown in fig. 2, the present embodiment includes steps S201 to S203.
In step S201, the OLT acquires the round-trip delay of each registered optical network unit ONU.
In the installation process of the existing network optical fiber broadband user, the operation system provides the numbering information of the user ONU to the OLT equipment. The OLT can master the serial number information of all the ONU equipment connected with the OLT, and the condition that the ONU equipment is not known to be accessed does not exist. For a registered ONU (also called an old user ONU), the ONU number information is already in the ONU number list of the OLT, and the OLT has already registered and activated through the ONU device to acquire the RTT (Round Trip Time) information corresponding to the ONU number information; for an unregistered ONU (also called a new-user ONU), its ONU number information is already in the ONU number list of the OLT, the ONU device is not yet activated, and the OLT does not have its RTT information.
For example, the OLT is connected to 4 ONUs: ONU1, ONU2, ONU3 and ONU 4. ONU1, ONU2, and ONU3 have all completed registration activation, and the OLT also records the RTT parameter: for ONU1, its corresponding RTT1 ═ 60 us; for ONU2, its corresponding RTT2 ═ 70 us; for ONU3, its corresponding RTT3 ═ 65 us. The ONU4 is an ONU device of a new user to be installed, registration and activation have not been completed, and there is no RTT parameter information of the ONU4 at the OLT.
In step S202, the OLT determines the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU.
And after the OLT port acquires the RTT information of all the old users ONU, selecting the RTT information RTTmax with the maximum value. For example, 70us is selected as RTTmax from the existing RTTs 1, 2 and 3.
In step S203, the OLT sets the length of the static window used by the registered ONU according to the maximum round-trip delay.
The OLT may add the maximum round-trip delay to the first preset delay to obtain the lengths of the static windows used by the registered ONUs in the O2 state and the O3 state; and adding the maximum round-trip delay to the second preset delay to obtain the length of the static window adopted by the registered ONU in the O4 state. And the second preset time delay is smaller than the first preset time delay.
For example, the OLT sets the RTTmax +50 us-120 us to the static window length adopted by the old-user ONU in the O2 and O3 states, and sets the RTTmax +2 us-72 us to the static window length adopted by the old-user ONU in the O4 state. Then, the OLT may use the length of the static window used by the registered ONU to apply to the registration activation state when the registered ONU comes online again.
In this embodiment, the OLT can obtain the optical fiber distance information of all ONUs actually connected thereto according to the RTT information, and thus dynamically sets the length of the static window in the ONU registration activation process according to the actual optical fiber length when an ONU is deployed in the passive optical network. Because the length of the dynamically set static window is usually smaller than the length of the static window specified in the standard, the length of the static window can be greatly reduced, so that the ONU activation function is provided, the delay and jitter of the ONU uplink service transmission are effectively reduced, and the service quality of the ONU uplink transmission is improved.
Meanwhile, the present network PON device can implement this embodiment by means of software upgrading, so this embodiment also has the characteristic of easy implementation, and is helpful for developing services such as virtual reality that are required by low latency in a convenient and efficient passive optical network.
Further embodiments of the method of setting the static window length of the present disclosure are described below in conjunction with FIG. 3.
FIG. 3 is a flow chart illustrating a method for setting a static window length according to further embodiments of the present disclosure. As shown in fig. 3, in addition to the embodiment corresponding to fig. 2, the present embodiment further includes step S304 to step S308.
In step S304, the OLT determines whether an unregistered ONU exists in the ONU number list.
When the ONU of a new user needs to be online, the network management system informs the OLT and is embodied in an ONU number list of the OLT.
If there is no unregistered ONU in the ONU number list, step S305 is executed.
In step S305, the OLT sends a first static window indication message, where the first static window indication message carries the static window type identifier of the registered ONU.
If there is an unregistered ONU in the ONU number list (for example, the new-user ONU4 applies for a service and installs it), step S306 to step S308 are executed.
In step S306, the OLT sets the static window length used by the unregistered ONU according to the standard static window length.
For example, the OLT sets 250us in the standard to the static window length adopted by the new-user ONU in the O2 and O3 states, and sets 202us in the standard to the static window length adopted by the new-user ONU in the O4 state.
In step S307, the OLT sets the ratio of the registered ONU static window to the unregistered ONU static window.
For example, the OLT sets the ratio of the registered ONU static window to the unregistered ONU static window to 10:1 in the O2 state and the O3 state to alternately select the registered ONU static window and the unregistered ONU static window. Those skilled in the art will understand that the proportion of the static window can be determined according to the actual deployment scenario, and the specific proportion data can also be 12: 1, or 23: 5, etc., by way of example and not by way of limitation.
In step S308, the OLT sends a first static window indication message and a second static window indication message, where the first static window indication message carries the static window type identifier of the registered ONU, and the second static window indication message carries the static window type identifier of the unregistered ONU.
Those skilled in the art will understand that when the OLT transmits the static window indication message in steps S305 and S308, the OLT transmits the static window indication message in a broadcast manner to the ONU in the O2 state and the ONU in the O3 state, and transmits the static window indication message in a unicast manner to the ONU in the O4 state.
At the ONU side, the ONU may receive the static window indication message, and identify the static window type identifier carried in the static window indication message to determine the static window type. Meanwhile, the ONU may determine its own identity information (whether the ONU is a registered ONU or an unregistered ONU), select a static window of a static window type corresponding to the identity information, and send a corresponding response message.
After the ONU detects the identity information stored by the ONU to determine the identity of the ONU, the ONU identifies and responds to the first static window indication message under the condition that the ONU is a registered ONU; in the event that the ONU is an unregistered ONU, identifying and responding to the second static window indication message.
Taking ONU1 as an example, ONU1 may perform the following operations:
(1) the ONU1 powers on again, receives a static window marked as the "registered ONU static window type" during registration activation;
(2) the ONU1 detects the identity information stored by itself and finds that the ONU belongs to the registered user;
(3) the ONU1 responds with a static window marked as "registered ONU static window type".
Taking ONU2 as an example, ONU2 may perform the following operations:
(1) after the ONU2 is powered on again, in registration activation, a static window marked as an "unregistered ONU static window type" is received;
(2) the ONU2 detects the identity information stored by itself and finds that the ONU belongs to the registered user;
(3) the ONU2 continues to wait for the static window to be received until a static window is received that is marked as "registered ONU static window type";
(4) the ONU2 responds with a static window marked as "registered ONU static window type".
Taking ONU4 as an example, ONU4 may perform the following operations:
(1) the ONU4 equipment is powered on, a registration activation process is carried out, and a static window with the mark of the type of the registered ONU static window is received;
(2) the ONU4 detects the identity information stored by itself and finds that the ONU belongs to an unregistered user;
(3) the ONU4 continues to wait to receive the static window until a static window is received with the "unregistered ONU static window type" flag
(4) The ONU4 responds to the static window with the flag "unregistered ONU static window type".
In this embodiment, the OLT can set different static window lengths for the registered ONU and the unregistered ONU, and set a static window type identifier in the static window indication message, so that the registered ONU responds to the static window indication message carrying the static window type identifier of the registered ONU in the O2, O3, and O4 states, and the unregistered ONU responds to the static window indication message carrying the static window type identifier of the unregistered ONU in the O2, O3, and O4 states, thereby providing an ONU activation function, further reducing the delay and jitter of ONU uplink service transmission, and improving the service quality of the ONU uplink transmission.
In some embodiments, steps S309-S311 are also included.
In step S309, the OLT receives the static window response message sent by the unregistered ONU.
Those skilled in the art will appreciate that the static window response message is a PLOAM (Physical Layer Operations, Administration and Maintenance) message containing ONU sequence numbers.
In step S310, the OLT determines the round-trip delay of the unregistered ONU according to the static window response message.
For example, the OLT determines from the static window response message that the round trip delay of ONU4 is 80 us.
In step S311, after the unregistered ONU completes the first registration, the OLT sends an ONU management control interface message to the first registered ONU, and sets the identity information of the first registered ONU as a registered ONU.
For example, OLT issues omci (ONU Management and Control interface) message to ONU4 to set the identity information of ONU4 as an old user, and when ONU4 goes online next time, ONU4 registers and activates in the manner of a registered ONU.
In this embodiment, the OLT can determine the round-trip delay of the ONU that is registered for the first time, and set the ONU that is registered for the first time as the registered ONU, so that the ONU that is registered for the first time can respond to the static window indication message carrying the static window type identifier of the registered ONU in the subsequent registration activation process, thereby reducing the delay and jitter of the ONU uplink service transmission, and improving the service quality of the ONU uplink transmission.
Some embodiments of the optical line termination of the present disclosure are described below in conjunction with figure 4.
Figure 4 shows a schematic structural diagram of an optical line terminal according to some embodiments of the present disclosure. As shown in fig. 4, the optical line terminal 40 in this embodiment includes:
a round-trip delay obtaining module 401 configured to obtain a round-trip delay of each registered optical network unit ONU;
a maximum round-trip delay determining module 402 configured to determine the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU;
a static window length setting module 403, configured to set a static window length adopted by the registered ONU according to the maximum round trip delay.
In this embodiment, the OLT can obtain the optical fiber distance information of all ONUs actually connected thereto according to the RTT information, and thus dynamically sets the length of the static window in the ONU registration activation process according to the actual optical fiber length when an ONU is deployed in the passive optical network. Because the length of the dynamically set static window is usually smaller than the length of the static window specified in the standard, the length of the static window can be greatly reduced, so that the ONU activation function is provided, the delay and jitter of the ONU uplink service transmission are effectively reduced, and the service quality of the ONU uplink transmission is improved.
Meanwhile, the present network PON device can implement this embodiment by means of software upgrading, so this embodiment also has the characteristic of easy implementation, and is helpful for developing services such as virtual reality that are required by low latency in a convenient and efficient passive optical network.
In some embodiments, the static window length setting module 403 is configured to: adding the maximum round-trip delay to a first preset delay to obtain the lengths of static windows adopted by the registered ONU in an O2 state and an O3 state; and adding the maximum round-trip delay to a second preset delay to obtain the length of a static window adopted by the registered ONU in the O4 state, wherein the second preset delay is smaller than the first preset delay.
In some embodiments, the optical line terminal 40 further comprises a first indication message sending module 404 configured to: and sending a first static window indication message under the condition that the unregistered ONU does not exist in the ONU number list, wherein the first static window indication message carries the type identifier of the static window of the registered ONU.
In some embodiments, the static window length setting module 403 is further configured to: setting the length of a static window adopted by the unregistered ONU according to the length of a standard static window under the condition that the unregistered ONU exists in the ONU number list; the optical line terminal 40 further includes a second indication message sending module 405 configured to: and sending a first static window indication message and a second static window indication message, wherein the first static window indication message carries the type identifier of the registered ONU static window, and the second static window indication message carries the type identifier of the unregistered ONU static window.
In some embodiments, the optical line terminal 40 further comprises a scale setting module 406 configured to: setting the ratio of the registered ONU static window to the unregistered ONU static window.
In these embodiments, the OLT can set different static window lengths for the registered ONU and the unregistered ONU, and set a static window type identifier in the static window indication message, so that the registered ONU responds to the static window indication message carrying the static window type identifier of the registered ONU in the O2, O3, and O4 states, and the unregistered ONU responds to the static window indication message carrying the static window type identifier of the unregistered ONU in the O2, O3, and O4 states, thereby providing an ONU activation function, further reducing the delay and jitter of ONU uplink traffic transmission, and improving the service quality of the ONU uplink transmission.
In some embodiments, the optical line terminal 40 further comprises: a response message receiving module 407 configured to receive a static window response message sent by an unregistered ONU; a round-trip delay determining module 408 configured to determine a round-trip delay of the unregistered ONU according to the static window response message; and the identity setting module 409 is configured to send an ONU management control interface message to the first-registered ONU after the first registration of the unregistered ONU is completed, and set the identity setting information of the first-registered ONU as the registered ONU.
In this embodiment, the OLT can determine the round-trip delay of the ONU that is registered for the first time, and set the ONU that is registered for the first time as the registered ONU, so that the ONU that is registered for the first time can respond to the static window indication message carrying the static window type identifier of the registered ONU in the subsequent registration activation process, thereby reducing the delay and jitter of the ONU uplink service transmission, and improving the service quality of the ONU uplink transmission.
Some embodiments of the disclosed passive optical network are described below in conjunction with fig. 5.
Fig. 5 shows a schematic structural diagram of a passive optical network according to some embodiments of the present disclosure. As shown in fig. 5, passive optical network 50 in the present embodiment includes: an optical line terminal 40, and an ONU501, wherein the ONU501 is configured to: detecting self-stored identity information to determine self-identity; identifying and responding to the first static window indication message under the condition that the ONU is the registered ONU; in the event that the ONU is an unregistered ONU, identifying and responding to the second static window indication message. Some embodiments of the apparatus for setting the static window length of the present disclosure are described below in conjunction with fig. 6.
Fig. 6 shows a schematic structural diagram of an apparatus for setting a static window length according to some embodiments of the present disclosure. As shown in fig. 6, the apparatus 60 for setting the length of the static window of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610, the processor 620 being configured to perform the method of setting the length of the static window in any of the embodiments described above based on instructions stored in the memory 610.
Memory 610 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
The apparatus 60 for setting the length of the static window may further include an input-output interface 630, a network interface 640, a storage interface 650, and the like. These interfaces 630, 640, 650 and the connections between the memory 610 and the processor 620 may be through a bus 660, for example. The input/output interface 630 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as an SD card and a usb disk.
The present disclosure also includes a computer readable storage medium having stored thereon computer instructions that, when executed by a processor, implement the method of setting the length of a static window in any of the foregoing embodiments.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (16)

1. A method of setting a static window length, comprising:
the optical line terminal OLT acquires the round-trip delay of each registered optical network unit ONU;
the OLT determines the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU;
and the OLT sets the length of a static window adopted by the registered ONU according to the maximum round-trip delay.
2. The method of claim 1, wherein the OLT sets a static window length employed by the registered ONU based on the maximum round trip delay comprises:
the OLT adds the maximum round-trip delay to a first preset delay to obtain the lengths of static windows adopted by the registered ONU in an O2 state and an O3 state;
and the OLT adds the maximum round-trip delay to a second preset delay to obtain the length of a static window adopted by the registered ONU in an O4 state, wherein the second preset delay is smaller than the first preset delay.
3. The method of claim 1, further comprising:
and the OLT sends a first static window indication message under the condition that the unregistered ONU does not exist in the ONU number list, wherein the first static window indication message carries the type identifier of the registered ONU static window.
4. The method of claim 1, further comprising:
the OLT sets the length of a static window adopted by the unregistered ONU according to the length of a standard static window under the condition that the unregistered ONU exists in the ONU number list;
the OLT sends a first static window indication message and a second static window indication message, wherein the first static window indication message carries the type identifier of the registered ONU static window, and the second static window indication message carries the type identifier of the unregistered ONU static window.
5. The method of claim 4, further comprising:
the OLT sets the ratio of the registered ONU static window to the unregistered ONU static window.
6. The method of claim 4, further comprising:
the OLT receives a static window response message sent by the unregistered ONU;
the OLT determines the round-trip delay of the unregistered ONU according to the static window response message;
and after the unregistered ONU finishes the first registration, the OLT sends an ONU management control interface message to the ONU which is registered for the first time, and the identity information of the ONU which is registered for the first time is set as the registered ONU.
7. The method of claim 6, further comprising:
the ONU detects the identity information stored by the ONU so as to determine the identity of the ONU;
identifying and responding to the first static window indication message under the condition that the ONU is the registered ONU;
in the event that the ONU is an unregistered ONU, identifying and responding to the second static window indication message.
8. An optical line terminal comprising:
a round-trip delay acquisition module configured to acquire round-trip delays of the registered optical network units ONU;
the maximum round-trip delay determining module is configured to determine the maximum round-trip delay of the registered ONU according to the round-trip delay of each registered ONU;
and the static window length setting module is configured to set the static window length adopted by the registered ONU according to the maximum round-trip delay.
9. The optical line terminal of claim 8, wherein the static window length setting module is configured to:
adding the maximum round-trip delay to a first preset delay to obtain the lengths of static windows adopted by the registered ONU in an O2 state and an O3 state;
and adding the maximum round-trip delay to a second preset delay to obtain the length of a static window adopted by the registered ONU in the O4 state, wherein the second preset delay is smaller than the first preset delay.
10. The optical line terminal of claim 8, further comprising a first indication message sending module configured to:
and sending a first static window indication message under the condition that the unregistered ONU does not exist in the ONU number list, wherein the first static window indication message carries the type identifier of the static window of the registered ONU.
11. The optical line terminal of claim 8, wherein the static window length setting module is further configured to: setting the length of a static window adopted by the unregistered ONU according to the length of a standard static window under the condition that the unregistered ONU exists in the ONU number list;
the optical line terminal further comprises a second indication message sending module configured to: and sending a first static window indication message and a second static window indication message, wherein the first static window indication message carries the type identifier of the registered ONU static window, and the second static window indication message carries the type identifier of the unregistered ONU static window.
12. The optical line terminal of claim 11, further comprising a scale setting module configured to: setting the ratio of the registered ONU static window to the unregistered ONU static window.
13. The optical line terminal of claim 11, further comprising:
a response message receiving module configured to receive a static window response message sent by an unregistered ONU;
a round trip delay determining module configured to determine a round trip delay of an unregistered ONU according to the static window response message;
and the identity setting module is configured to send an ONU management control interface message to the ONU which is registered for the first time after the unregistered ONU finishes the first registration, and set the identity information of the ONU which is registered for the first time as the registered ONU.
14. A passive optical network comprising an optical line terminal according to claim 13 and an ONU, wherein the ONU is configured to: detecting self-stored identity information to determine self-identity; identifying and responding to the first static window indication message under the condition that the ONU is the registered ONU; in the event that the ONU is an unregistered ONU, identifying and responding to the second static window indication message.
15. An apparatus for setting a passive optical network static window length, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of setting a passive optical network static window length of any of claims 1 to 7 based on instructions stored in the memory.
16. A computer readable storage medium, wherein the computer readable storage medium stores computer instructions which, when executed by a processor, implement the method of setting a passive optical network static window length as claimed in any one of claims 1 to 7.
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