JP7463841B2 - CONTROL DEVICE, PON SYSTEM, AND COMMUNICATION METHOD - Google Patents

Description

The present invention relates to a home device, a control device, a PON system, a communication method, and a maintenance method.

Conventionally, in services such as FTTH (Fiber to the Home), a PON (Passive Optical Network) system has been used in which an optical signal is split into multiple parts so that multiple users can share a single optical fiber (see, for example, Patent Document 1). In a PON system, for example, an OLT (Optical Line Terminal) is used as the station side device and an ONU (Optical Network Unit) is used as the home side device, and an optical splitter that multiplexes and splits optical signals is provided between the OLT and the ONU, so that multiple ONUs are connected to one OLT.

Normally, a host IP address is not set for an ONU. This is to prevent unauthorized access by a third party through an IP address. For this reason, a normal ONU operates in bridge mode in a layer 2 network.

JP 2018-504812 A

In the maintenance and operation of a PON system, it is preferable to periodically collect log data from ONUs and check the normality of communication. Possible methods for collecting log data from current ONUs include, for example, opening the ONU housing and connecting a cable to the board, or expanding the functionality of Ethernet OAM (Operations Administration Maintenance) related to the operation, management, and maintenance of the Layer 2 network between the OLT and ONUs. However, both methods have problems such as the time required to collect log data and the high operational costs due to the complicated processing.

The present invention was made in consideration of the above situation, and aims to quickly and easily collect log data from home devices.

An optical network unit according to one aspect of the present invention is an optical network unit connected to an optical line terminal, and is configured to operate in a layer 2 network, receive a log acquisition request including information related to IP address setting from the optical line terminal, perform a setting process based on the information related to the IP address setting included in the log acquisition request to set an IP address, activate the set IP address, and operate in a layer 3 network to acquire logs.

A control device according to one aspect of the present invention is a control device that controls a home network device via a station device, and is configured to transmit a log acquisition request that includes information related to IP address setting, and acquire the log of the home network device using a Layer 3 network based on a response from the home network device that has completed setting and activating an IP address based on the log acquisition request.

A PON system according to one aspect of the present invention is a PON system including an optical line terminal, an optical network unit connected to the optical line terminal, and a control device that controls the optical network unit via the optical line terminal. The control device transmits a log acquisition request related to the setting of an IP address to the optical network unit via the optical line terminal. The optical network unit performs a setting process based on the information related to the setting of the IP address included in the log acquisition request, sets the IP address, activates the set IP address, and operates in a layer 3 network to acquire logs. The control device acquires the logs of the optical network unit using the layer 3 network.

A communication method according to one aspect of the present invention is a communication method for a PON system including an optical line terminal, an optical network terminal connected to the optical line terminal, and a control device that controls the optical network terminal via the optical line terminal, the optical network terminal operating in a Layer 2 network and communicating between the optical line terminal and the optical network terminal in the Layer 2 network, and the optical network terminal operating in a Layer 3 network by activating an IP address set based on a log acquisition request from the control device, and communicating between the control device, the optical line terminal, and the optical network terminal in the Layer 3 network to acquire logs.

A maintenance method according to one aspect of the present invention is a maintenance method for a telecommunications carrier for log acquisition of a home-side device, and includes the steps of: creating configuration information including an IP address of a log acquisition terminal that performs log acquisition and information related to the setting of an IP address to be set in the ONU; setting, in a control terminal, an instruction to send a log acquisition request including the configuration information to the home-side device; and setting, in the log acquisition terminal, an instruction to acquire the log so that log acquisition of the home-side device is performed after the setting and activation of the IP address in the home-side device based on the log acquisition request is completed.

The present invention makes it possible to quickly and easily collect log data from home devices.

FIG. 1 is a configuration diagram of a PON system according to an embodiment. FIG. 2 is a diagram showing the data plane when an ONU operates in a layer 3 network. FIG. 3 is a sequence diagram showing a process in the PON system. FIG. 4 is an explanatory diagram of a processing image of a PON system according to a comparative example.

[Description of the embodiment of the present invention]
First, an embodiment of the present invention will be described. An optical network unit according to one aspect of the present invention is an optical network unit connected to an optical line terminal, and is configured to operate in a layer 2 network, receive a log acquisition request including information related to an IP address setting from the optical line terminal, perform a setting process based on the information related to the IP address setting included in the log acquisition request, set an IP address, and activate the set IP address to operate in a layer 3 network for log acquisition.

In one aspect of the present invention, an optical network unit operates in a Layer 2 network during normal operation, and when a log acquisition request is received, an IP address is set and activated based on information related to the IP address setting, and the optical network unit operates in a Layer 3 network during log acquisition operations. With this configuration, the optical network unit log is acquired by IP communication on the Layer 3 network when acquiring logs, so that the optical network unit log can be acquired more quickly and easily than by opening the ONU housing to collect logs or by expanding the OAM functions to collect logs.

The home appliance may be further configured to perform a disconnection process to cut off communication between the home appliance and a communication terminal connected to the home appliance when setting the IP address. With this configuration, when collecting logs of the home appliance using IP communication of the Layer 3 network, communication between the home appliance and the communication terminal is stopped. As a result, when collecting logs, the area in which IP communication is possible is limited to a higher level than the home appliance, improving security.

The home device may receive a log acquisition request that includes information indicating an IP address, and perform a setting process to set the IP address included in the log acquisition request. With this configuration, it is extremely easy to set the IP address in the home device.

The home appliance may receive a log acquisition request that does not include information indicating an IP address, and upon receiving the log acquisition request, may generate an IP address using a specified algorithm and perform a setting process to set the generated IP address. With this configuration, the log acquisition request does not include information indicating an IP address, and the home appliance generates an IP address using a specified algorithm, so there is little risk of a third party stealing the IP address, and unauthorized access by a third party can be effectively prevented.

The home appliance may be further configured to operate again in a layer 2 network after log acquisition is completed. With this configuration, the home appliance operates in a layer 3 network only when log acquisition is performed, and unauthorized access by third parties can be effectively prevented while log acquisition is properly performed.

A control device according to one aspect of the present invention is a control device that controls home appliance devices via an optical line device, and is configured to execute the following: sending a log acquisition request including information related to IP address setting; and acquiring the log of the home appliance device using a layer 3 network based on a response from the home appliance that has completed setting and activating the IP address based on the log acquisition request. With such a control device, a log acquisition request including information related to IP address setting is sent to cause the home appliance device to appropriately set an IP address, and after the IP address is set and activated, the log of the home appliance is appropriately acquired using the layer 3 network. This allows the log of the home appliance to be acquired quickly and easily.

A PON system according to one aspect of the present invention is a PON system including an optical line terminal, an optical network unit connected to the optical line terminal, and a control device that controls the optical network unit via the optical line terminal. The control device transmits a log acquisition request related to the setting of an IP address to the optical network unit via the optical line terminal, the optical network unit performs a setting process based on the information related to the setting of the IP address included in the log acquisition request and sets the IP address, the optical network unit activates the set IP address and operates in a layer 3 network to acquire logs, and the control device acquires the logs of the optical network unit using the layer 3 network. With such a PON system, the logs of the optical network unit can be acquired quickly and easily, just like the optical network unit described above.

A communication method according to one aspect of the present invention is a communication method for a PON system including an optical line terminal, an optical network terminal connected to the optical line terminal, and a control device that controls the optical line terminal via the optical line terminal, the optical line terminal operating in a layer 2 network and communicating between the optical line terminal and the optical line terminal in the layer 2 network, and the optical line terminal operating in a layer 3 network by activating an IP address set based on a log acquisition request from the control device, and communicating between the control device, the optical line terminal, and the optical line terminal in the layer 3 network for log acquisition. According to this communication method, the optical line terminal normally operates in a layer 2 network and communicates with the optical line terminal in the layer 2 network, and when acquiring logs, the optical line terminal operates in a layer 3 network and communicates with the upper device in the layer 3 network. This realizes the normal payload communication function, and when acquiring logs, the logs of the optical line terminals can be acquired quickly and easily.

A maintenance method according to one aspect of the present invention is a maintenance method for a telecommunications carrier for log acquisition of an optical network device, and includes the steps of: creating configuration information including an IP address of a log acquisition terminal that performs log acquisition and information related to the setting of an IP address to be set in an ONU; setting an instruction to a control terminal to send a log acquisition request including the configuration information to an optical network device; and setting an instruction to the log acquisition terminal to acquire a log so that log acquisition of the optical network device is performed after the setting and activation of the IP address in the optical network device based on the log acquisition request is completed. According to this maintenance method, the IP address of the optical network device is appropriately set and log acquisition is appropriately performed when acquiring logs, and logs of the optical network device can be acquired quickly and easily.

[Details of the embodiment of the present invention]
A specific example of a PON system according to an embodiment of the present invention will be described below with reference to the drawings. In the description, the same elements or elements having the same functions will be denoted by the same reference numerals, and duplicated descriptions will be omitted.

FIG. 1 is a configuration diagram of a PON system according to an embodiment. The PON system 1 is a system operated by a company such as a cable television company. The PON system 1 is a network system in which an optical signal is split into multiple signals and a single optical fiber is shared by multiple users in providing FTTH services. As shown in FIG. 1, the PON system 1 includes an ONU 10 (home device), an OLT 30 (station device), a control terminal 50 and a log acquisition terminal 70 constituting a control device, and a PC (Personal Computer) 100. Although FIG. 1 shows one OLT 30 and one ONU 10, in reality, the PON system 1 includes multiple OLTs 30, and multiple ONUs 10 are connected to each OLT 30. The OLT 30 and the multiple ONUs 10 are connected to each other via an FTTH network. The control terminal 50 is provided, for example, in a center of a telecommunications company, and is provided in one-to-one correspondence with the OLT 30. In addition, one control terminal 50 may be provided corresponding to multiple OLTs 30. The log acquisition terminal 70 is connected to the OLT 30 via the upper network NW.

As shown in FIG. 1, the ONU 10 includes a MAC logic circuit 11, an optical link 12, a SerDes 13, a UNI-IF circuit 14, a DRAM 15, and a flash memory 16. The optical link 12 transmits and receives optical signals to and from the OLT 30. The SerDes 13 converts data transmission methods between serial communication and parallel communication. The MAC logic circuit 11 is a circuit that performs various calculation processes, and generates a format for a PON frame based on data input from the UNI-IF circuit 14, analyzes the data from the OLT 30, and outputs the data to be sent to the PC 100 to the UNI-IF circuit 14. The UNI-IF circuit 14 outputs frames input from the PC 100 to the MAC logic circuit 11, and outputs frames input from the MAC logic circuit 11 to the PC 100. The DRAM 15 is used as a packet buffer for upstream and downstream, and as a memory for calculations in the MAC logic circuit 11. The flash memory 16 stores log data of various processes in the ONU 10. More specifically, the log data is data such as the results of the startup process from when the ONU 10 is started to when it is completed, the results of the settings of the ONU 10's operation contents from the OLT 30 to the ONU 10, and other operational results from the OLT 30 to the ONU 10.

ONU 10 operates in a layer 2 network in normal mode. That is, ONU 10 functions as a layer 2 bridge in normal mode.

ONU 10 receives a log acquisition request from OLT 30, which includes ONU-specific information, which is information related to the setting of a host IP address. The log acquisition request is sent from control terminal 50, which is a higher-level device of OLT 30, and is received by ONU 10 via OLT 30. The ONU-specific information includes at least the IP address and default gateway information of the log acquisition terminal 70. When ONU 10 receives the log acquisition request, it sets the host IP address in order to switch from normal mode to maintenance mode. ONU 10 performs setting processing based on the ONU-specific information included in the log acquisition request, and sets its own host IP address.

Specifically, when ONU 10 receives a log acquisition request including ONU-specific information that includes information indicating a host IP address, it performs a setting process (hereinafter, may be described as "method 1 setting process") to set the host IP address included in the log acquisition request. The information indicating the host IP address may be the host IP address itself, or may be information associated with a host IP address that can uniquely identify the host IP address. In this case, ONU 10 activates (activates) the host IP address without rebooting, and activates IP communication. ONU 10 activates the host IP address and operates in a layer 3 network to acquire logs. Note that ONU 10 can communicate via IP only with log acquisition terminals 70 whose IP addresses are specified in the ONU-specific information.

In addition, when the ONU 10 receives a log acquisition request including ONU-specific information that does not include information indicating a host IP address, the ONU 10 may generate a host IP address using a specified algorithm upon receiving the log acquisition request, and perform a setting process (hereinafter, sometimes referred to as "setting process of method 2") to set the generated host IP address. The specified algorithm is an algorithm that is preset in the software of the ONU 10. The host IP address is generated by the algorithm, for example, based on the unique MAC address of the ONU 10 and the time information at that time. The MAC address of the ONU 10 is set at the time of shipment from the factory and is not rewritten in the field. The ONU 10 transmits the set host IP address to the OLT 30, and then activates (activates) the host IP address without rebooting, thereby activating IP communication. The host IP address generated by the above-mentioned algorithm is completely unique, so it needs to be transmitted to the OLT 30. The ONU 10 can perform IP communication only with the log acquisition terminal 70 whose IP address is specified in the ONU-specific information.

When setting the host IP address, the ONU 10 performs a disconnection process so that communication between the ONU 10 and the in-home PC 100 connected to the ONU 10 is cut off. Specifically, when the ONU 10 determines that IO communication is possible, it disconnects the MAC logic circuit 11 from the UNI-IF circuit 14 before activating IP communication (see Figure 2). In this way, the function related to IP communication of the ONU 10 is limited to the function of delivering log data to the higher-level device, and communication with the in-home PC 100 is temporarily suspended from the viewpoint of security protection.

After log acquisition is complete, ONU 10 operates again in the Layer 2 network. That is, when log acquisition is complete in maintenance mode, ONU 10 receives a request to stop log acquisition from OLT 30, deactivates the host IP address, reconnects the MAC logic circuit 11 and the UNI-IF circuit 14, transitions to normal mode, and operates as a Layer 2 bridge.

As shown in FIG. 1, the OLT 30 includes a CPU 31, a MAC logic circuit 32, an optical link 33, a SerDes 34, an NNI-IF circuit 35, a DRAM 36, and a flash memory 37. The optical link 33 transmits and receives optical signals to and from the ONU 10. The SerDes 34 converts data transmission methods between serial communication and parallel communication. The MAC logic circuit 32 is a circuit that performs various calculations, and generates a format for a PON frame based on data input from the NNI-IF circuit 35, analyzes the frame for data from the ONU 10, and outputs the data to be transmitted to the upper network NW to the NNI-IF circuit 35. The NNI-IF circuit 35 outputs the frame input from the upper network NW to the MAC logic circuit 32, and outputs the frame input from the MAC logic circuit 32 to the upper network NW. The DRAM 36 is used as a packet buffer for uplink and downlink, and as a memory for calculations in the MAC logic circuit 32. The flash memory 37 stores log data of various processes in the OLT 30. The CPU 31 executes calculations that are not performed by the MAC logic circuit 32, for example.

The OLT 30 receives a log acquisition request from the control terminal 50 and transmits the log acquisition request to the ONU 10. The OLT 30 transmits the log acquisition request to the ONU 10, for example, by using an extended OAM that is an extension of the Ethernet OAM functions related to the operation, management, and maintenance of the Layer 2 network between the OLT 30 and the ONU 10.

For example, when ONU 10 performs the setting process of the above-mentioned method 1, OLT 30 copies the ONU-specific information in which the host IP address is set to the extended OAM and transmits the extended OAM to ONU 10. When ONU 10 performs the setting process of the above-mentioned method 2, OLT 30 copies the ONU-specific information in which the host IP address is not set to the extended OAM and transmits the extended OAM to ONU 10. This method of using extended OAM is also used in existing ONU firmware downloads, so it can be realized without making major modifications to OLT 30 and ONU 10 (without development time). In addition, the extended OAM transmitted from OLT 30 to ONU 10 is encrypted because it is a frame flowing in the downstream direction of the PON section. Therefore, there is a low risk that the ONU-specific information copied to the extended OAM (for example, information including the host IP address set to ONU 10) will be stolen.

The control terminal 50 (one component of the control device) is a device that controls the ONU 10 via the OLT 30. The control terminal 50 transmits a log acquisition request including ONU-specific information, which includes information related to the setting of the host IP address, to the ONU 10 via the OLT 30. As described above, the ONU-specific information includes at least the IP address and default gateway information of the log acquisition terminal 70. In addition, when the ONU 10 performs the setting process of the above-mentioned method 1, the ONU-specific information includes the host IP address.

When log acquisition by the log acquisition terminal 70 is completed, the control terminal 50 sends a request to stop log acquisition to the ONU 10 via the OLT 30.

The log acquisition terminal 70 executes a log acquisition process to acquire log data of the ONU 10 using the layer 3 network based on a response from the ONU 10 that has completed setting and activating the host IP address based on the log acquisition request. Figure 2 is a diagram showing the data plane when the ONU 10 operates in the layer 3 network. As shown in Figure 2, the log acquisition terminal 70 collects log data of the ONU 10 from the flash memory 16 of the ONU 10 by IP communication in the layer 3 network. In this case, as described above, the connection between the MAC logic circuit 11 and the UNI-IF circuit 14 in the ONU 10 is disconnected.

Next, the processing in the PON system 1 according to this embodiment will be described with reference to FIG. 3. FIG. 3 is a sequence diagram showing the processing in the PON system 1. FIG. 3 is a sequence diagram showing the communication method in the PON system 1, and is also a sequence diagram showing the maintenance method of the telecommunications carrier.

As shown in FIG. 3, in normal mode, ONU 10 is assumed to be operating in a layer 2 network (step S1). In this case, when switching to a maintenance mode in which log data of ONU 10 is acquired, first, the telecommunications carrier creates setting information to be set in the control terminal 50. The setting information includes ONU-specific information. The ONU-specific information includes at least the IP address and default gateway information of the log acquisition terminal 70. Furthermore, when the setting process of the above-mentioned method 1 is performed in ONU 10, the ONU-specific information includes information indicating the host IP address set in ONU 10. Then, the telecommunications carrier sets an instruction to send a log acquisition request including the setting information to ONU 10 (an instruction to send to ONU 10 via OLT 30) in the control terminal 50.

In response to the set transmission instruction, the control terminal 50 transmits a log acquisition request including ONU-specific information to the OLT 30 (step S2). Next, the OLT 30 transmits the log acquisition request (an instruction to change operation from the layer L2 network to the layer L3 network) to the ONU 10 (step S3).

When the ONU 10 receives a log acquisition request, it first disconnects the MAC logic circuit 11 from the UNI-IF circuit 14 (step S4). Next, the ONU 10 performs a host IO address setting process (step S5). Specifically, when the ONU 10 receives a log acquisition request including ONU-specific information including information indicating a host IP address, it performs a setting process (method 1 setting process) to set the host IP address included in the log acquisition request. When the ONU 10 receives a log acquisition request including ONU-specific information that does not include information indicating a host IP address, it generates a host IP address using a predetermined algorithm upon receiving the log acquisition request, and performs a setting process (method 2 setting process) to set the generated host IP address. Then, the ONU 10 activates (activates) the host IP address without rebooting, activating IP communication (step S6).

Next, ONU 10 sends a response to the log acquisition request (response to change operation from layer L2 network to layer L3 network) to OLT 30 (step S7). If ONU 10 is performing the setting process of method 2, the response includes information indicating the host IP address set in ONU 10. OLT 30 sends a response to the log acquisition request (response indicating that log acquisition is enabled) to control terminal 50 (step S8). In this state, ONU 10 operates in the layer 3 network (step S9).

The log acquisition terminal 70 then starts log acquisition (step S10) and executes a log acquisition process to acquire log data of the ONU 10 using the Layer 3 network. As a prerequisite for the log acquisition process to be executed, the telecommunications carrier sets a log acquisition instruction in the log acquisition terminal 70 so that such a log acquisition process is executed. When the acquisition of the log data is completed, the log acquisition terminal 70 ends the log acquisition process (step S11).

When the log acquisition process is completed, the control terminal 50 sends a log acquisition stop request to the OLT 30 (step S12). Next, the OLT 30 sends the log acquisition stop request (an instruction to change operation from the layer L3 network to the layer L2 network) to the ONU 10 (step S13).

When ONU 10 receives the request to stop log acquisition, it deactivates the host IP address (step S14). Then, ONU 10 reconnects the MAC logic circuit 11 and the UNI-IF circuit 14 (step S15).

Next, ONU 10 sends a response to the log acquisition stop request (response to change operation from layer L3 network to layer L2 network) to OLT 30 (step S16). OLT 30 sends a response to the log acquisition stop request (response to the effect that log acquisition is disabled) to control terminal 50 (step S17). In this state, ONU 10 transitions to normal mode and operates as a layer 2 bridge (step S18).

Next, the effects of the configuration according to this embodiment will be explained in comparison with a PON system 500 according to a comparative example (see FIG. 4).

The PON system 500 according to the comparative example shown in FIG. 4 is similar to the PON system 1 according to the present embodiment in that it includes an ONU 10, an OLT 30, and a control terminal 50. Here, unlike the PON system of the present embodiment, the PON system 500 as shown in FIG. 4 does not include a configuration related to log acquisition of the ONU 10 (log acquisition terminal 70), and the ONU 10 operates only in the layer 2 network without a host IP address being set. When acquiring log data of the ONU 10 in such a configuration, for example, a method of opening the housing of the ONU 10 and connecting a cable to the board to collect data, or a method of using extended OAM is adopted. However, with these methods, it takes time to collect log data, and the processing is complicated, resulting in high operating costs.

In contrast, the ONU 10 of the PON system 1 according to this embodiment is an ONU 10 connected to the OLT 30, and is configured to operate in a Layer 2 network, receive a log acquisition request from the OLT 30 that includes information related to the setting of a host IP address, perform a setting process based on the information related to the setting of the host IP address included in the log acquisition request, set the host IP address, activate the set host IP address, and operate in a Layer 3 network to acquire logs.

In such an ONU 10, while operating in a layer 2 network in normal mode, when a log acquisition request is received, a host IP address is set based on information related to the host IP address setting, it is activated, and it operates in a layer 3 network in a mode for log acquisition (maintenance mode). With this configuration, when acquiring logs, the ONU 10 log is acquired by IP communication in the layer 3 network, so that the ONU 10 log data can be acquired quickly and easily compared to a method of opening the housing of the ONU 10 to collect log data or a method of collecting log data by expanding the OAM functions.

The ONU 10 may be further configured to perform a disconnection process to cut off communication between the ONU 10 and the home PC 100 connected to the ONU 10 when setting the host IP address. With this configuration, when log data of the ONU 10 is collected using IP communication on the Layer 3 network, communication between the ONU 10 and the PC 100 is stopped. This limits the area in which IP communication is possible to a higher level than the home device when collecting log data, improving security.

The ONU 10 may receive a log acquisition request that includes information indicating a host IP address, and perform a setting process to set the host IP address included in the log acquisition request. With this configuration, the host IP address can be set very easily in the ONU 10.

ONU 10 may receive a log acquisition request that does not include information indicating a host IP address, and upon receiving the log acquisition request, may perform a setting process to generate a host IP address using a specified algorithm and set the generated host IP address. With this configuration, the log acquisition request does not include information indicating the host IP address, and the host IP address is generated by ONU 10 using a specified algorithm, so there is little risk of a third party stealing the host IP address, and unauthorized access by a third party can be effectively prevented.

The ONU 10 may be further configured to operate again in a Layer 2 network after log acquisition is complete. With this configuration, the ONU 10 operates in a Layer 3 network only when log acquisition is performed, and unauthorized access by third parties can be appropriately prevented while log acquisition is performed appropriately.

The control device consisting of the control terminal 50 and the log acquisition terminal 70 according to this embodiment is a control device that controls the ONU 10 via the OLT 30, and is configured to execute the following: sending a log acquisition request including information related to the setting of a host IP address; and acquiring log data of the ONU 10 using a layer 3 network based on a response from the ONU 10 that has completed setting and activating the host IP address based on the log acquisition request. With such a control device, a log acquisition request including information related to the setting of a host IP address is sent to cause the ONU 10 to appropriately set a host IP address, and after the host IP address is set and activated, the log data of the ONU 10 is appropriately acquired using the layer 3 network. This allows the log data of the ONU 10 to be acquired quickly and easily.

The PON system 1 according to this embodiment is a PON system including an OLT 30, an ONU 10 connected to the OLT 30, and a control device (a control terminal 50 and a log acquisition terminal 70) that controls the ONU 10 via the OLT 30. The control terminal 50 transmits a log acquisition request related to the setting of a host IP address to the ONU 10 via the OLT 30, the ONU 10 performs a setting process based on the information related to the setting of the host IP address included in the log acquisition request, sets the host IP address, the ONU 10 activates the set host IP address, and operates in a layer 3 network to acquire logs. The log acquisition terminal 70 acquires log data of the ONU 10 using the layer 3 network. With such a PON system 1, logs of home devices can be acquired quickly and easily.

The communication method according to this embodiment is a communication method for a PON system 1 including an OLT 30, an ONU 10 connected to the OLT 30, and a control device (a control terminal 50 and a log acquisition terminal 70) that controls the ONU 10 via the OLT 30, and includes the following: the ONU 10 operates in a layer 2 network, and communication is performed between the OLT 30 and the ONU 10 in the layer 2 network; and the ONU 10 operates in a layer 3 network by activating a host IP address set based on a log acquisition request from the control terminal 50, and communication is performed between the control device, the OLT 30, and the ONU 10 in the layer 3 network for log acquisition. According to this communication method, the ONU 10 operates in the layer 2 network during normal operation and communicates with the OLT 30 through the layer 2 network, and the ONU 10 operates in the layer 3 network during log acquisition and communicates with the upper device through the layer 3 network. This realizes the function of normal payload communication, and at the time of log acquisition, log data of the ONU 10 can be acquired quickly and easily.

The maintenance method according to this embodiment is a maintenance method for a telecommunications carrier related to log acquisition of an ONU 10, and includes the steps of creating setting information including the host IP address of a log acquisition terminal 70 that performs log acquisition and information related to the setting of the host IP address to be set in the ONU 10, setting an instruction to the control terminal 50 to send a log acquisition request including the setting information to the ONU 10, and setting an instruction to acquire a log in the log acquisition terminal 70 so that log acquisition of the ONU 10 is executed after the setting and activation of the host IP address in the ONU 10 based on the log acquisition request is completed. According to this maintenance method, the host IP address of the ONU 10 is appropriately set and log acquisition is executed when acquiring logs, and log data of the ONU 10 can be acquired quickly and easily.

The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the meaning described above, and is intended to include all modifications within the meaning and scope of the claims.

1...PON system, 10...ONU, 30...OLT, 50...control terminal, 70...log acquisition terminal.

Claims (3)

A control device that controls a home device via a station device,
Transmitting a log acquisition request including information related to IP address settings;
A control device configured to execute the following: acquiring the log of the home device using a Layer 3 network based on a response from the home device that has completed setting and activating an IP address based on the log acquisition request. A PON system including an optical line terminal, an optical network unit connected to the optical line terminal, and a control device that controls the optical network unit via the optical line terminal,
the control device transmits a log acquisition request related to the setting of an IP address to the home device via the optical line device;
the optical network device performs a setting process based on information related to the setting of the IP address included in the log acquisition request, and sets an IP address;
the home device activates the set IP address and operates in a Layer 3 network to acquire logs;
The control device acquires a log of the home device by using the Layer 3 network. A communication method for a PON system including an optical line terminal, an optical network unit connected to the optical line terminal, and a control device that controls the optical network unit via the optical line terminal, the method comprising:
the optical network unit operates on a layer 2 network, and communication is performed between the optical line terminal and the optical network unit on the layer 2 network;
A communication method comprising: activating an IP address set based on a log acquisition request from the control device, thereby causing the home device to operate on a Layer 3 network; and communicating between the control device, the station device, and the home device on the Layer 3 network to acquire logs.

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