WO2023056856A1

WO2023056856A1 - Device management method and apparatus in optical network, and device

Info

Publication number: WO2023056856A1
Application number: PCT/CN2022/121702
Authority: WO
Inventors: 刘海星; 何浩然
Original assignee: 华为技术有限公司
Priority date: 2021-10-08
Filing date: 2022-09-27
Publication date: 2023-04-13
Also published as: CN115967872A

Abstract

Embodiments of the present application relate to the field of optical communications, and particularly relates to a device management method and apparatus in an optical network, and a device. According to the embodiments of the present disclosure, a first optical network unit obtains the number and port attributes of the physical ports of a second optical network unit from the second optical network unit. The first optical network unit is connected to an optical line terminal, and the first optical network unit and the second optical network unit are cascaded. The first optical network unit establishes a logical channel between the physical port of the second optical network unit and the logical port of the first optical network unit. The first optical network unit reports the number of ports including the logical port and the physical port to the optical line terminal. The first optical network unit receives requested configuration from the optical line terminal. The first optical network unit transmits the configuration of the logical channel to the second optical network unit. In this way, the management complexity of multiple optical network devices is reduced, and the deployment cost is reduced.

Description

Method, device and device for device management in optical network

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on October 8, 2021, with application number 202111171647.7, and the title of the application is "method, device and equipment for equipment management in optical network", the entire content of which is passed References are incorporated in this application.

technical field

The present disclosure relates to the field of optical communications, and in particular, to a management method, device and system for passive optical network (Passive Optical Network, PON) equipment.

Background technique

The passive optical network is a commonly used technology in the current optical access network, and it is an optical access technology for point-to-multipoint transmission. The PON system consists of an Optical Line Terminal (OLT), an Optical Distribution Network (ODN), and an Optical Network Unit (ONU). The OLT provides a network side interface for the ODN, and the OLT is connected to one or more ODNs. The ODN is mainly a passive optical splitter, which transmits the downlink data of the OLT to each ONU single power supply through the splitter, and aggregates and transmits the uplink data of the ONU to the OLT. The ONU is the access aggregation unit on the user side, providing users with the function of user port access, such as Ethernet port, WIFI access and other methods.

Contents of the invention

Example embodiments of the present disclosure provide a solution for management of devices in an optical network.

In a first aspect of the present disclosure, a method implemented in an optical network is provided. The method includes that the first ONU obtains from the second ONU the number of physical ports and port attributes of the second ONU. The first ONU is connected to an OLT. The first ONU is cascaded with the second ONU. The method also includes the first ONU establishing a logical channel between the physical port of the second ONU and a logical port at the first ONU. The method further includes the first ONU reporting the number of ports including logical ports and physical ports to the OLT. The method also includes the first ONU receiving the logical port configuration from the OLT. The method includes the first ONU sending the configuration of the logical channel to the second ONU. In this way, the complexity of management and the cost of engineering installation are reduced.

In some embodiments, the method further includes the first ONU determining the number of added logical ports based on the number of physical ports. The method further includes the first ONU reporting the determined identifier of the logical port to the OLT. In this manner, it is realized that the first ONU and the second ONU virtualize the optical line terminal into one device for management, which is beneficial for efficient management.

In some embodiments, the method further includes: for a physical port of the second ONU, the first ONU determines a corresponding logical port based on the port attribute of the physical port. The method also includes the first ONU mapping the physical port to the logical port. The method also includes the first optical network unit assigning an identifier to the logical channel between the physical port and the logical port to identify the logical channel. In some embodiments, the configuration of the logical channel includes: an identifier of the physical port, an identifier of the logical port, and an identifier of the logical channel. In this way, reasonable channel mapping and packet data forwarding are realized.

In some embodiments, the method further includes the first ONU discovering the second ONU through an auto-discovery protocol. In this way, timely allocation of management addresses is achieved. In some embodiments, the method further includes the first optical network unit obtaining the quantity of the physical port and the port attribute from the second optical network unit through an extension field of an auto-discovery protocol packet, The extended field of the automatic discovery protocol message includes the number and the port attribute, or the extended field of the dynamic host configuration protocol message includes the number and the port attribute. In this way, timely creation of logical channels is achieved.

In some embodiments, the method further includes the first ONU receiving downlink packet data for a physical port of the second ONU from the OLT. The method also includes the first ONU searching for a logical port corresponding to the physical port. The method further includes the first optical network unit processing the downlink packet data to add an identifier of a logical channel between the physical port and the corresponding logical port. The method further includes the first ONU forwarding the processed downlink packet data to the second ONU. In this manner, local intercommunication of local traffic through the first ONU and the second ONU is realized, thereby avoiding interruption of the local network.

In some embodiments, the method further includes the first ONU receiving uplink packet data from a physical port from the second ONU. The uplink packet data includes an identifier of a logical channel between the physical port and the corresponding logical port. The method also includes the first ONU searching for a logical port corresponding to the physical port. The method further includes the first ONU processing the uplink packet data to remove the identifier from the uplink packet data. The method further includes the first ONU sending the processed uplink packet data to the OLT via an uplink interface. In this manner, local intercommunication of local traffic through the first ONU and the second ONU is realized, thereby avoiding interruption of the local network.

In a second aspect of the present disclosure, a method implemented in an optical network is provided. The method includes the second ONU reporting the number of physical ports and port attributes of the second ONU to the first ONU. The first ONU is connected to an OLT. The first ONU is cascaded with the second ONU. The method also includes the second ONU receiving from the first ONU a configuration of a logical channel between the physical port of the second ONU and a logical port at the first ONU. In this way, the complexity of management and the cost of engineering installation are reduced.

In some embodiments, the method further includes the second optical network unit reporting the number of physical ports and the port attributes to the first optical network unit through an extension field of an auto-discovery protocol message, The extended field of the automatic discovery protocol message includes the number and the port attribute, or the extended field of the dynamic host configuration protocol message includes the number and the port attribute. In this way, timely creation of logical channels is achieved.

In some embodiments, the configuration of the logical channel includes: an identifier of the physical port, an identifier of the logical port, and an identifier of the logical channel. In this way, reasonable channel mapping and packet data forwarding are realized.

In some embodiments, the method further includes the second ONU receiving downlink packet data from the first ONU, where the downlink packet data includes an identifier of a logical channel. The method includes the second ONU processing the downlink message data to remove the identifier. The method includes the second optical network unit forwarding the processed downlink message data to a physical port corresponding to the identifier. In this manner, local intercommunication of local traffic through the first ONU and the second ONU is realized, thereby avoiding interruption of the local network.

In some embodiments, the method further includes the second ONU receiving uplink packet data from the user terminal via a physical port. The method further includes the second optical network unit processing the uplink packet data to add an identifier of a logical channel between the physical port and the corresponding logical port to the uplink packet data. The method further includes the second ONU forwarding the processed uplink packet data to the first ONU via an uplink port.

In a third aspect of the present disclosure, an apparatus for use in an optical network is provided. The apparatus includes components for executing the method in any possible implementation manner according to the foregoing first aspect or second aspect.

In a fourth aspect of the present disclosure, the present disclosure provides a chip. The chip is configured to perform operations according to the method in any possible implementation manner of the first aspect or the second aspect above.

In a fifth aspect of the present disclosure, an apparatus for use in an optical network is provided. The device includes: a processor, configured to execute the method in any possible implementation manner according to the first aspect or the second aspect above; and an interface, configured to interact with the processor, to send and receive messages sent and received by the processor text data.

In a sixth aspect of the present disclosure, an optical network device is provided. The network device includes: a device for executing the method in any possible implementation manner according to the first aspect or the second aspect above; an uplink port for connecting with an optical network terminal; a downlink port for connecting with another optical network unit connections; and physical ports for connection to user terminals.

In a seventh aspect of the present disclosure, a computer program product is provided. The computer program product is tangibly stored on a computer-readable medium and includes computer-executable instructions. When executed, the computer-executable instructions cause the device to implement the The operation of the method.

Description of drawings

The features, advantages and other aspects of various implementations of the present disclosure will become more apparent with reference to the following detailed description when taken in conjunction with the accompanying drawings. Several implementations of the present disclosure are shown here by way of illustration and not limitation, in the accompanying drawings:

FIG. 1 shows a schematic block diagram of a communication environment to which an embodiment of the present disclosure is applicable;

FIG. 2 shows an interactive signaling diagram of a communication process according to some embodiments of the present disclosure;

FIG. 3 shows a schematic diagram of port mapping between a master ONU and a slave ONU according to some embodiments of the present disclosure;

Fig. 4 shows a schematic diagram of message transmission according to some embodiments of the present disclosure;

Figure 5 shows a flowchart of a method according to some embodiments of the present disclosure;

Fig. 6 shows a flowchart of a method according to other embodiments of the present disclosure;

7A and 7B respectively show a schematic block diagram of a communication device according to some embodiments of the present disclosure; and

Figure 8 shows a simplified block diagram of an example device suitable for implementing embodiments of the present disclosure.

In the various drawings, the same or similar reference numerals denote the same or similar elements.

Detailed ways

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for exemplary purposes only, and are not intended to limit the protection scope of the present disclosure.

In the description of the embodiments of the present disclosure, the term "comprising" and its similar expressions should be interpreted as an open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be read as "at least one embodiment". The terms "first", "second", etc. may refer to different or the same object. Other definitions, both express and implied, may also be included below.

The term "OLT" used in this article refers to the central office equipment of telecommunications, which is used to connect to the optical fiber trunk line. It functions as a switch or router in a traditional communication network, and is a device for the entrance and exit of the external network and the internal network. Placed at the central office, the most important execution functions are traffic scheduling, buffer control, and providing user-oriented passive optical network interfaces and allocating bandwidth. To put it simply, it is to realize two functions. For the upstream, the upstream access of the PON network is completed; for the downstream, the obtained data is sent and distributed to all ONU user terminal equipment through the ODN network.

The term "ONU" used in this article refers to a device with the following functions: selectively receive the broadcast sent by the OLT, and if it is necessary to receive the data, it must receive a response to the OLT; collect and cache the Ethernet data that the user needs to send , sending the buffered data to the OLT according to the allocated sending window.

The term "ODN" used in this article refers to the fiber-to-the-home (Fiber To The Home, FTTH) optical cable network based on PON equipment, which is the optical transmission physical channel between the OLT and the ONU, and its main function is to complete the two-way transmission of optical signals. It usually consists of fiber optic cables, optical connectors, optical splitters, and supporting equipment for installing and connecting these devices. The most important component is the optical splitter.

As mentioned above, the ONU is an access convergence unit on the user side, providing users with user port access functions, such as Ethernet port, WIFI access and other methods. For example, an ONU can generally provide users with access to 4, 8 or 16 user ports. In some scenarios, the number of users who need to access the optical access network in an area (for example, a classroom) exceeds the number of user-side ports of an ONU. In this case, multiple ONU devices need to be deployed. For example, the OLT can be used to access multiple ONU devices to solve the multi-user problem. These ONU devices are connected in parallel to the OLT. However, such a solution will bring high engineering costs, and it is impossible to manage these ONUs in a unified manner. In addition, packets in the same area need to pass through the OLT to communicate.

In other solutions, a system may include a main ONU connected to the OLT, the downlink port of the main ONU is a PON port, and multiple ONU devices are connected through the PON port. However, since the downlink port of the main ONU is a PON port, general ONUs cannot support it. In addition, the main ONU and multiple ONU devices are connected through optical fibers, which increases the engineering cost. Each port of the secondary ONU is invisible on the OLT, and the OLT cannot manage multiple ONU devices.

In view of the above problems and other potential problems, according to an embodiment of the present disclosure, the first ONU obtains the number of physical ports and port attributes of the second ONU from the second ONU. The first ONU is connected to an OLT, and the first ONU is cascaded with the second ONU. The first ONU requests the OLT for the configuration of the logical port corresponding to the physical port. The first ONU receives the requested configuration from the optical line terminal. The first ONU establishes a logical channel between the physical port and the logical port based on the requested configuration and port attributes. The first ONU sends the configuration of the logical channel to the second ONU. In this way, the management complexity of multi-optical network equipment is reduced, and the deployment cost is reduced.

As shown in Figure 1, the communication system 100 includes ONU 110, ONU 120-1 and ONU 120-2. It is understood that the communication system 100 may include any suitable number of ONUs. The communication system 100 also includes an optical network terminal 130 . As shown in Figure 1, ONU 110 is connected to optical network terminal 130 by optical distribution network 140. In this case, ONU 110 may be referred to as a "master ONU", and ONU 120-1 and ONU 120-2 are "slave ONUs". It can be understood that the master ONU may include any suitable number of slave ONUs, and is not limited to the number shown in FIG. 1 . ONU 120-1 and ONU 120-2 are connected to optical network terminal 130 through ONU 110. ONU 120-1 and ONU 120-2 are cascaded through the user side port of ONU 110. In this way, the local traffic communicates locally through the master ONU and the slave ONU, thereby avoiding interruption of the local network when the OLT network is interrupted. The physical ports of the cascaded ONU 120-1 and ONU 120-2 are managed as the extended ports of the ONU 110. In this way, multiple optical network devices are virtualized into one device for management of the optical network terminal, thereby reducing the management cost of the optical network terminal.

Exemplary embodiments of the present disclosure will be discussed in detail below with reference to the accompanying drawings. For ease of discussion, the process of device management and signaling interaction between communication entities according to an example embodiment of the present disclosure will be described with reference to the example communication environment of FIG. 1 . It should be understood that example embodiments of the present disclosure may be similarly applied in other communication environments.

FIG. 2 shows a signaling diagram of interaction 200 between various devices according to an embodiment of the present disclosure. The interaction 200 will be described below with reference to FIGS. 3 and 4 . By way of example only, interaction 200 involves ONU 110, ONU 120-1, and OLT 130.

The ONU 110 executes the 2010 online process. During the ONU online process, the Physical Layer Orbital Angular Momentum (PLOAM) message, that is, the OAM of the physical layer, can be used to support the management function of the PON. Alternatively or additionally, during the online process of the ONU, the BWmap message can also be used, which is a message used by the OLT to allocate the upstream bandwidth of the ONU. There are two ONU online procedures: non-preconfigured ONU online and preconfigured ONU online.

In some embodiments, in the process of the non-preconfigured ONU going online, going online is divided into five states: (1) initial state, OLT sends a message to ONU to start the ONU, and ONU enters the ready state; (2) ready state, ONU receives the message, takes out the parameters including delimiter value, power level, pre-allocation compensation delay and other parameters in the message, and adjusts its own configuration according to the parameters to match the subsequent information exchange; (3) Sequence code status: OLT sends to ONU Serial number request; ONU responds to OLT’s serial number request; OLT assigns a temporary ONU ID to the ONU after receiving the ONU’s serial number response message; (4) Ranging status: OLT sends a ranging request to ONU; ONU receives After receiving the ranging request from the OLT, respond to the message with its own SN and ONU ID; the OLT calculates the compensation delay of the ONU, sends a message to the ONU, and the ONU sets the compensation delay after receiving the message; (5) Operation status: OLT will Send a password request to the ONU, and the ONU responds to the OLT with a password that is not configured on the OLT. If the PON of the OLT has enabled the auto-discovery function, an ONU auto-discovery alarm will be reported to the host command line or the network management system. The ONU will go online normally after being confirmed. If it is a pre-configured ONU going online, the ONU and the OLT perform authentication to go online.

After ONU 110 goes online, OLT 130 inquires 2020 the quantity of the port of this ONU 110 to ONU 110. For example, if the ONU is automatically discovered, there are two viewing methods. The first one is in the global mode, that is, under CONFIG, display ONT autofind all (display ont autofind all), which can display the ONUs discovered by all ports of the device. The second way is to log in to EPON 0/X and display the ONUs discovered by a certain PON port.

ONU 110 configures port 2030 services for OLT 130. For example, the port service may be a video service. Alternatively, the port service may also be an audio service. Embodiments of the present disclosure are not limited in this respect.

The ONU 120-1 is connected to the downstream port of the ONU 110 through a network cable. After the ONU 120-1 is powered on, the ONU 120-1 can distribute the 2040 address to the ONU 110. For example, the ONU 120-1 can automatically assign a management address through a Dynamic Host Configuration Protocol (DHCP). The term "downstream port" used herein refers to a port that can forward downstream packets.

ONU 110 and ONU 120-1 execute 2050 a discovery process. For example, ONU 110 may discover ONU 120-1 through an autodiscovery protocol. In some embodiments, the auto-discovery protocol may be a Universal Plug and Play (UPNP) protocol. The goal of the UPNP protocol is to enable various devices in home networks (data sharing, communication and entertainment) and corporate networks to be seamlessly connected to each other, and to simplify the implementation of related networks. Alternatively, the auto-discovery protocol may be a constrained application protocol (Constrained Application Protocol, CAOP). The CAOP protocol is an Internet application protocol dedicated to constrained devices. It can be understood that the automatic discovery protocol may also include any other suitable protocols.

The ONU 120-1 reports 2060 the number of physical ports of the ONU 120-1 and the port attributes of the physical ports to the ONU 110. Thereby, ONU110 obtains the quantity and port attribute of the physical port of ONU 120-1. In some embodiments, the number of physical ports and the attributes of the ports may be included in an extension field of the auto-discovery protocol. Alternatively, the number of physical ports and the attributes of the ports may also be included in the extension field of the DHCP protocol. As shown in Figure 3, ONU 120-1 can report the quantity of its physical port to ONU 110 as 4. The term "physical port" used herein refers to a port that can exchange data with a user terminal.

In some embodiments, the port attributes may include the speed of the port. For example, the port attribute may indicate whether the corresponding physical port is a 100M port or a Gigabit port. It can be understood that the port attribute may also include any other suitable information.

The ONU 110 may determine the number of newly added logical ports based on the obtained number of physical ports of the ONU 120-1. As shown in Figure 3, ONU 110 has user side port 110-1, user side port 1102, user side port 1103 and user side port 1104. If ONU 120-1 has reported 4 physical ports, then ONU 110 has determined newly added 4 logical ports (that is, logical port 1105, logical port 1106, logical port 1107, logical port 1108). In some embodiments, if ONU 120-2 also reports 4 physical ports, then ONU 110 has determined 4 newly-added logical ports (that is, logical port 1109, logical port 1110, logical port 1111, logical port 1112). It can be understood that the number of ports shown in FIG. 3 is only exemplary and not limiting. ONU 110, ONU 120-1, and ONU 120-2 may have more or less than the number of ports shown in FIG. 3 . The term "logical port" used in this document refers to a port that is capable of exchanging message data but does not physically exist.

The ONU 110 establishes a logical channel between the physical port of the 2070ONU120-1 and the logical port at the ONU 110. The term "logical channel" as used herein refers to a path that can be used to transfer message data between physical ports and logical ports. The attributes of the physical port of ONU120-1 will be synchronized to the corresponding logical port. ONU 110 can map the physical port to a logical port. ONU 110 may assign an identifier to a logical channel to identify the logical channel. In this way, the unified management of the ports of the master ONU and the slave ONU is realized. In some embodiments, the ONU can assign a virtual local area network identity (Virtual Local Area Network Identity, VLANID) to the logical channel. Alternatively, the ONU 110 may use an extension field in a power BI format (Power BI Template, PBIT) message to identify a logical channel. In other embodiments, the ONU 110 may also use an extension field in a Differentiated Services Code Point (DSCP) message to identify a logical channel. In other embodiments, the ONU 110 may use an extended field in a virtual extended local area network (Virtual eXtensible Local Area Network (VXLAN) Network Identifier, VNI) message to identify the logical channel.

Referring to FIG. 3, ONU 110 establishes a logical channel between physical port 1211 and logical port 1105. By analogy, the ONU 110 establishes a logical channel between the physical port 1212 and the logical port 1106, a logical channel between the physical port 1213 and the logical port 1107, and a logical channel between the physical port 1214 and the logical port 1108. In other embodiments, when the ONU 120-2 also reports the physical port, the ONU 110 also establishes a logical channel between the physical port of the ONU 120-2 and the logical port at the ONU 110. Similarly, with reference to FIG. 3, ONU 110 establishes a logical channel between physical port 1221 and logical port 1109, a logical channel between physical port 1222 and logical port 1110, a logical channel between physical port 1223 and logical port 1111, and Physical port 12224 and logical port 1112. As shown in Figure 3, the identifier 310 can identify the logical channel between the physical port 1211 and the logical port 1105, the identifier 320 can identify the logical channel between the physical port 1212 and the logical port 1106, and the identifier 330 can identify the physical port 1213 With the logical channel between the logical port 1107 , the identifier 340 may identify the logical channel between the physical port 1214 and the logical port 1108 . Similarly, identifier 350 can identify a logical channel between physical port 1221 and logical port 1109, identifier 360 can identify a logical channel between physical port 1222 and logical port 1110, and identifier 370 can identify physical port 1223 and logical port 1111, the identifier 380 may identify a logical channel between the physical port 1224 and the logical port 1112. Table 1 shows the mapping between logical ports and physical ports. It can be understood that Table 1 is only exemplary, not limiting.

Table 1

The ONU 110 reports the number of newly added ports of the 2080 to the OLT 130. In some embodiments, if ONU 120-1 has reported 4 physical ports and ONU 110 has determined newly added 4 logical ports, then ONU 110 reports newly added 4 logical ports and 4 physical ports to OLT 130 . Alternatively or additionally, if ONU 120-2 also reports 4 physical ports and ONU 110 determines additional 4 logical ports, then ONU 110 reports to OLT 130 that 8 ports and 8 physical ports have been added. port. The ONU 110 can report the number of newly added ports through an information exchange protocol between the OLT and the ONU. For example, the ONU 110 may report the number of newly added ports through the ONU Management and Control Interface (OMCI) protocol. Alternatively, the ONU 110 may also report the number of newly added ports through the OAM protocol.

In some embodiments, the ONU 110 reports the identification of the newly added port to the OLT 130. For example, as shown in Figure 3, ONU 110 can report the identification of logical port 1105, the identification of logical port 1106, the identification of logical port 1107, the identification of logical port 1108, the identification of logical port 1109, the identification of logical port 1110, the identification of logical port The identifier of 1111 and the identifier of logical port 1112.

In some embodiments, OLT 130 may query the capabilities of these newly added ports. For example, the capabilities of a port may include port attributes. As noted above, port attributes may include the port's speed. The port attribute may also include the service type of the port. Similarly, in some embodiments, the OLT 130 can query the capabilities of the port through the OMCI protocol. Alternatively, the OLT 130 can also query the capability of the port through the OAM protocol.

OLT 130 sends the configuration of port 2090 to ONU 110. For example, the OLT 130 may send the configuration of the corresponding port to the ONU 110 based on the preset configuration by identifying the identifier of the newly added logical port. ONU 110 will also send 2100 configuration-based control information to ONU 120-1. The ONU 110 can also deliver control information to corresponding hardware representation items.

ONU 110 sends the configuration of the logical channel established by 2110 to ONU 120-1. In some embodiments, the configuration may include an identifier for the logical channel. Additionally, the configuration may include an identifier of a physical port associated with the logical channel. In other embodiments, the configuration may also include an identifier of a logical port associated with the logical channel. It can be understood that the configuration may also include other information about the logical channel.

ONU 120-1 sends 2120 uplink message data to OLT 130 via ONU 110. OLT 130 sends 2130 downlink message data to ONU 120-1 via ONU 110. The process of sending uplink message data (2120) and the process of sending downlink message data (2130) will be described below with reference to FIG. 4 . The term "uplink packet data" used herein may refer to packet data from a user terminal to a device in an optical network. The term "downlink packet data" used herein may refer to packet data from a device in an optical network to a user terminal.

In some embodiments, as shown in FIG. 4 , the ONU 120-1 receives upstream message data 410 from a user terminal via a physical port 1211. The ONU 120-1 processes the uplink packet data 410. For example, ONU 120-1 adds the identifier 310 of the logical channel between physical port 1211 and logical port 1105. ONU 120-1 sends the processed upstream message data to ONU 110 via the upstream port. The processed uplink packet data includes identifier 310 and uplink packet data 410 . After identifying the identifier 310, the ONU 110 strips the identifier 310. The ONU 110 sends the compiled uplink message 410' to the OLT 130 via the uplink interface. The term "uplink port" used herein refers to a port for forwarding uplink packets.

In other embodiments, as shown in FIG. 4, the ONU 110 receives the downstream message data 420 from the OLT 130. The downlink message data is aimed at the physical port 1212 of the ONU 120-1. ONU 110 looks up the logical port corresponding to physical port 1212. In this case, the corresponding logical port is logical port 1106 . The ONU 110 can process the downlink packet data 420. For example, the ONU adds the identifier 320 of the logical channel between the physical port 1212 and the logical port 1106 . ONU 110 sends the processed downstream message data to ONU 120-1. The processed downlink message data includes identifier 320 and downlink message data 420 . After identifying the identifier 320, the ONU 120-1 strips the identifier 320. The ONU 120-1 sends the compiled downlink message 420' to the user terminal via the physical port 1212.

FIG. 5 shows a schematic diagram of the flow of an exemplary data processing method 500 . Method 500 is implemented at a master ONU, e.g., ONU 110.

In some implementations, ONU 110 can perform an onboarding process. The specific online process has been described with reference to FIG. 2 , and will not be repeated here. ONU 110 configures port 2030 services for the OLT. For example, the port service may be a video service. Alternatively, the port service may also be an audio service. Embodiments of the present disclosure are not limited in this respect.

Additionally, ONU 110 and ONU 120-1 perform a discovery process. The specific sending process has been described with reference to FIG. 2 , and will not be repeated here.

At block 510, the ONU 110 obtains from the ONU 120-1 the number of physical ports of the ONU 120-1 and the port attributes of the physical ports. In some embodiments, the number of physical ports and the attributes of the ports may be included in an extension field of the auto-discovery protocol. Alternatively, the number of physical ports and the attributes of the ports may also be included in the extension field of the DHCP protocol.

At block 520, ONU 110 establishes a logical channel between the physical port of ONU 120-1 and the logical port at ONU 110. The ONU 110 may determine the number of newly added logical ports based on the obtained number of physical ports of the ONU 120-1. The attributes of the physical port of ONU120-1 will be synchronized to the corresponding logical port. In this way, the unified management of the ports of the master ONU and the slave ONU is realized.

At frame 530, the ONU 110 reports the number of newly added ports to the OLT 130. The number of newly added ports includes the number of logical ports and physical ports. In some embodiments, if the ONU 120-1 reports 4 physical ports and the ONU 110 determines the newly added 4 logical ports, then the ONU 110 reports to the OLT 130 that 4 newly added ports and 4 physical ports have been added. Alternatively or additionally, if ONU 120-2 also reports 4 physical ports and ONU 110 determines additional 4 logical ports, then ONU 110 reports to OLT 130 that 8 ports and 8 physical ports have been added. port. The ONU 110 can report the number of newly added ports through an information exchange protocol between the OLT and the ONU. In some embodiments, the ONU 110 reports the identification of the newly added port to the OLT 130.

At block 540, the ONU 110 receives the port configuration from the OLT 130. ONU 110 may also send 2110 configuration-based control information to ONU 120-1. The ONU 110 can also deliver control information to corresponding hardware representation items.

At block 550, ONU 110 sends the configuration of the established logical channel to ONU 120-1. In some embodiments, the configuration may include an identifier for the logical channel. It can be understood that the configuration may also include other information about the logical channel.

In some embodiments, ONU 120-1 sends upstream message data to OLT 130 via ONU 110. In other embodiments, ONU 110 sends downlink message data received from OLT 130 to ONU 120-1. The specific process of sending the uplink message data and the process of sending the downlink message data have been described with reference to FIG. 2 and FIG. 4 , and will not be repeated here.

FIG. 6 shows a schematic diagram of the flow of an exemplary data processing method 600 . Method 600 is implemented at a slave ONU, for example, ONU 120-1.

The ONU 120-1 is connected to the downstream port of the ONU 110 through a network cable. After the ONU 120-1 is powered on, the ONU 120-1 can assign an address to the ONU 110.

At frame 610, the ONU 120-1 reports to the ONU 110 the number of physical ports of the ONU 120-1 and the port attributes of the physical ports. In some embodiments, the number of physical ports and the attributes of the ports may be included in an extension field of the auto-discovery protocol. Alternatively, the number of physical ports and the attributes of the ports may also be included in the extension field of the DHCP protocol. As shown in Figure 3, ONU 120-1 can report the quantity of its physical port to ONU 110 as 4.

In some embodiments, the port attributes may include the speed of the port. For example, the port attribute may indicate whether the corresponding physical port is a 100M port or a Gigabit port. Alternatively or additionally, the port attribute may include the service type of the port. For example, the port attribute may indicate that the service on the corresponding physical port is a video service. It can be understood that the port attribute may also include any other suitable information.

At block 620, ONU 120-1 receives from ONU 110 the configuration of the established logical channel. In some embodiments, the configuration may include an identifier for the logical channel. It can be understood that the configuration may also include other information about the logical channel.

In some embodiments, ONU 120-1 sends upstream message data to OLT 130 via ONU 110. In other embodiments, ONU 120-1 receives downstream message data from ONU 110. The specific process of sending the uplink message data and the process of sending the downlink message data have been described with reference to FIG. 2 and FIG. 4 , and will not be repeated here.

FIG. 7A shows a schematic block diagram of an apparatus 710 for data processing according to some embodiments of the present disclosure. The apparatus 710 may be implemented as device software or a chip in the device, and the scope of the present disclosure is not limited in this regard. The device 710 can be realized as an ONU 110 as shown in FIG. 1 .

As shown in FIG. 7A , the apparatus 710 includes: an obtaining unit 711 configured to obtain, from the second ONU, the number of physical ports and port attributes of the second ONU. For example, the obtaining unit 711 may execute step 510 shown in FIG. 5 . The apparatus 710 also includes an establishing unit 712 configured to establish a logical channel between the physical port of the second ONU and the logical port of the first ONU. For example, the establishing unit 712 may execute step 520 shown in FIG. 5 . The apparatus 710 also includes a sending unit 713 configured to send the configuration of the logical channel to the second ONU. For example, the sending unit 713 may execute step 530 shown in FIG. 5 . The apparatus 710 includes a reporting unit 714 configured to report the number of logical ports to the OLT. For example, the reporting unit 714 may execute step 540 shown in FIG. 5 . The apparatus 710 includes a receiving unit 715 configured to receive the configuration of the logical port from the OLT. For example, the receiving unit 715 may execute step 550 shown in FIG. 5 . The apparatus 710 may also include a unit for realizing the steps performed by the ONU 110 in FIG. 2 . For the sake of brevity, details are not described here.

FIG. 7B shows a schematic block diagram of an apparatus 720 for data processing according to some embodiments of the present disclosure. The apparatus 720 may be implemented as a device or a chip in a device, and the scope of the present disclosure is not limited in this regard. The device 720 may be implemented as an ONU 120-1 as shown in FIG. 1 .

As shown in FIG. 7B , the device 720 includes: a reporting unit 721 configured to report the number of physical ports and port attributes of the second ONU to the first ONU. For example, the reporting unit 721 may execute step 610 shown in FIG. 6 . The apparatus 720 also includes a receiving unit 722 configured to receive the configuration of the logical channel from the first ONU. For example, the receiving unit 722 may execute step 620 shown in FIG. 6 . The apparatus 720 may also include a unit for realizing the steps performed by the ONU 120-1 in FIG. 2 . For the sake of brevity, details are not described here.

FIG. 8 is a simplified block diagram of an example device 800 suitable for implementing embodiments of the present disclosure. The device 800 can be used to realize the ONU as shown in FIG. 1 . As shown, device 800 includes one or more processors 810 , one or more memories 820 coupled to processors 810 , and a communication module 840 coupled to processors 810 .

The communication module 840 can be used for two-way communication. The communication module 840 may have at least one communication interface for communication. Communication interfaces may include any interface necessary to communicate with other devices.

Processor 810 may be of any type suitable for the local technical network, and may include, but is not limited to, at least one of the following: a general purpose computer, a special purpose computer, a microcontroller, a digital signal processor (Digital Signal Processor, DSP), or a control-based One or more of the multi-core controller architectures of the processor. Device 800 may have multiple processors, such as application specific integrated circuit chips, that are time slaved to a clock that is synchronized to a main processor.

Memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memory include but are not limited to at least one of the following: read-only memory (Read-Only Memory, ROM) 824, erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), flash memory, hard disk , Compact Disc (CD), Digital Video Disk (Digital Versatile Disc, DVD) or other magnetic and/or optical storage. Examples of volatile memory include, but are not limited to, at least one of: Random Access Memory (RAM) 822, or other volatile memory that does not persist for the duration of a power outage.

The computer program 830 comprises computer-executable instructions executed by the associated processor 810 . The program 830 can be stored in the ROM 820. Processor 810 may perform any suitable actions and processes by loading program 830 into RAM 820.

Embodiments of the present disclosure may be implemented by means of a program 830 such that the device 800 may perform any process as described with reference to any one of FIG. 2 , FIG. 5 and FIG. 6 . Embodiments of the present disclosure can also be realized by hardware or by a combination of software and hardware.

In some embodiments, program 830 may be tangibly embodied on a computer readable medium, which may be included in device 800 (such as in memory 820 ) or other storage device accessible by device 800 . Program 830 may be loaded from a computer readable medium into RAM 822 for execution. The computer readable medium may include any type of tangible nonvolatile memory such as ROM, EPROM, flash memory, hard disk, CD, DVD, and the like.

In general, the various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor or other computing device. While various aspects of the embodiments of the present disclosure are shown and described as block diagrams, flowcharts, or using some other pictorial representation, it should be understood that the blocks, devices, systems, techniques or methods described herein can be implemented as, without limitation, Exemplary, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof.

The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, which are executed in a device on a real or virtual processor of a target to perform the process/method as described above with reference to FIGS. 2 , 5 and 6 . Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functionality of the program modules may be combined or divided as desired among the program modules. Machine-executable instructions for program modules may be executed within local or distributed devices. In a distributed device, program modules may be located in both local and remote storage media.

Computer program codes for implementing the methods of the present disclosure may be written in one or more programming languages. These computer program codes can be provided to processors of general-purpose computers, special-purpose computers, or other programmable data processing devices, so that when the program codes are executed by the computer or other programmable data processing devices, The functions/operations specified in are implemented. The program code may execute entirely on the computer, partly on the computer, as a stand-alone software package, partly on the computer and partly on a remote computer or entirely on the remote computer or server.

In the context of the present disclosure, computer program code or related data may be carried by any suitable carrier to enable a device, apparatus or processor to perform the various processes and operations described above. Examples of carriers include signals, computer readable media, and the like. Examples of signals may include electrical, optical, radio, sound, or other forms of propagated signals, such as carrier waves, infrared signals, and the like.

A computer readable medium may be any tangible medium that contains or stores a program for or related to an instruction execution system, apparatus, or device. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination thereof. In addition, while operations of methods of the present disclosure are depicted in a particular order in the figures, this does not require or imply that operations must be performed in that particular order, or that all illustrated operations must be performed, to achieve desirable results. Conversely, the steps depicted in the flowcharts may be performed in an altered order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and/or one step may be decomposed into multiple steps for execution. It should also be noted that the features and functions of two or more devices according to the present disclosure may be embodied in one device. Conversely, the features and functions of one device described above may be further divided to be embodied by a plurality of devices.

Having described various implementations of the present disclosure, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed implementations. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described implementations. The choice of terminology used herein aims to well explain the principles of each implementation, practical applications or improvements to technologies in the market, or to enable other ordinary skilled persons in the technical field to understand the various implementations disclosed herein.

Claims

A method implemented in an optical network, characterized in that the method comprises:

The first optical network unit obtains the number of physical ports and port attributes of the second optical network unit from the second optical network unit, wherein the first optical network unit is connected to an optical line terminal, and the first optical network unit cascaded with the second ONU;

The first ONU establishes a logical channel between the physical port of the second ONU and a logical port at the first ONU;

The first ONU reports the number of ports including the logical port and the physical port to the OLT; and

the first optical network unit receives the configuration of the logical port from the optical line terminal;

The first ONU sends the configuration of the logical channel to the second ONU.
The method according to claim 1, further comprising:

The first optical network unit determines the number of added logical ports based on the number of physical ports; and

The first optical network unit reports the determined identifier of the logical port to the optical line terminal.
The method according to claim 1 or 2, wherein establishing the logical channel by the first optical network unit comprises:

For a physical port of the second optical network unit,

The first optical network unit determines a corresponding logical port based on the port attribute of the physical port;

the first optical network unit maps the physical port to the logical port; and

The first optical network unit assigns an identifier to the logical channel between the physical port and the logical port to identify the logical channel.
The method according to any one of claims 1-3, wherein the configuration of the logical channel comprises:

the identifier of the physical port,

the identifier of the logical port, and

The identifier of the logical channel.
The method according to any one of claims 1-4, wherein the method further comprises:

The first ONU discovers the second ONU through an automatic discovery protocol.
The method according to any one of claims 1-5, wherein the first ONU obtains all the physical ports of the second ONU from the second ONU. The number and properties of the ports include:

The first optical network unit obtains the number of physical ports and the port attribute from the second optical network unit through one of the following:

An extension field of an auto-discovery protocol packet, where the extension field of the auto-discovery protocol packet includes the quantity and the port attribute, or

An extension field of a dynamic host configuration protocol packet, where the extension field of the auto-discovery protocol packet includes the number and the port attribute.
The method according to any one of claims 1-6, wherein the method further comprises:

The first optical network unit receives downlink packet data for a physical port of the second optical network unit from the optical line terminal;

The first optical network unit searches for a logical port corresponding to the physical port;

The first optical network unit processes the downlink packet data to add an identifier of a logical channel between the physical port and the corresponding logical port; and

The first optical network unit forwards the processed downlink packet data to the second optical network unit.
The method according to any one of claims 1-6, wherein the method further comprises:

The first optical network unit receives uplink packet data from a physical port from the second optical network unit, and the uplink packet data includes an identifier of a logical channel between the physical port and a corresponding logical port;

The first optical network unit searches for a logical port corresponding to the physical port;

The first optical network unit processes the uplink packet data to remove the identifier from the uplink packet data; and

The first optical network unit sends the processed uplink packet data to the optical line terminal via an uplink interface.
A method implemented in an optical network, characterized in that the method comprises:

The second optical network unit reports the number of physical ports and port attributes of the second network unit to the first optical network unit, wherein the first optical network unit is connected to an optical line terminal, and the first optical network unit and cascading the second ONUs; and

The second ONU receives from the first ONU a configuration of a logical channel between the physical port of the second ONU and a logical port at the first ONU.
The method according to claim 9, wherein the second ONU reports the number of the physical ports and the port attributes of the second ONU to the first ONU include:

The second optical network unit reports the number of physical ports and the port attributes to the first optical network unit through the following item:

An extension field of an auto-discovery protocol packet, where the extension field of the auto-discovery protocol packet includes the quantity and the port attribute, or

An extension field of a dynamic host configuration protocol packet, where the extension field of the auto-discovery protocol packet includes the number and the port attribute.
The method according to any one of claims 9-10, wherein the configuration of the logical channel comprises:

the identifier of the physical port,

the identifier of the logical port, and

The identifier of the logical channel.
The method according to any one of claims 9-11, wherein the method further comprises:

The second optical network unit receives downlink packet data from the first optical network unit, and the downlink packet data includes an identifier of a logical channel;

The second ONU processes the downlink packet data to remove the identifier; and

The second optical network unit forwards the processed downlink packet data to the physical port corresponding to the identifier.
The method according to any one of claims 9-11, wherein the method further comprises:

The second optical network unit receives uplink packet data from the user terminal via a physical port;

The second optical network unit processes the uplink packet data to add an identifier of a logical channel between the physical port and the corresponding logical port to the uplink packet data; and

The second ONU forwards the processed uplink packet data to the first ONU via an uplink port.
An optical network unit, characterized in that it comprises:

means for performing the method according to any one of claims 1-8; and

The uplink port is used to connect with the optical network terminal;

Downlink port, used to connect with another optical network unit;

Physical port, used to connect with user terminals.
An optical network unit, characterized in that it comprises:

means for performing the method according to any one of claims 9-13;

The uplink port is used to connect with the optical network terminal;

a downstream port for connecting to another optical network unit; and

Physical port, used to connect with user terminals.
A device used in an optical network, the device is applied in an optical network unit, characterized in that it includes:

A processor configured to perform the method according to any one of claims 1-8; and

The interface is used to interact with the processor to send and receive message data sent and received by the processor.
A device used in an optical network, the device is applied in an optical network unit, characterized in that it includes:

a processor configured to perform the method according to any one of claims 9-13; and

The interface is used to interact with the processor to send and receive message data sent and received by the processor.
A chip configured to perform any one of claims 1-8 or any one of claims 9-13.