JP5677396B2 - Communication apparatus and communication method - Google Patents

Description

  The present invention relates to a communication device and a communication method, and more particularly to a lower-level communication device that performs communication with a plurality of higher-level communication devices.

  In recent years, communication systems that perform communication between an upper network and lower communication devices have become widespread. A user can communicate with a higher-level network using a lower-level communication device according to a predetermined communication protocol using a communication method defined in each communication system, for example, a signal in a wavelength band.

  For example, in a communication system in which a plurality of subscriber-side communication devices as lower-level communication devices such as PON (Passive Optical Network) share a communication medium (such as optical fiber), the user uses each subscriber-side communication device. Communication is performed with the station-side communication device and further with the higher-level network using a communication method according to a predetermined condition (see Patent Document 1 and Patent Document 2).

Japanese Patent Laying-Open No. 2011-77798 (page 11, FIGS. 1 and 3) JP 2010-226693 A (page 11, FIG. 1)

  When communication is performed in communication systems using different communication methods, the LAN-side physical layer control setting method is different, and therefore a lower-level communication device corresponding to each communication system is required.

  For example, if the LAN side physical layer control setting method in the subscriber side communication device as a lower level communication device is different between PON communication systems, one setting method communicates the setting control frame from the station side communication device. To the LAN side physical layer control circuit in the subscriber side communication device using the MDIO (Management Data Input / Output) interface from the PON control circuit in the subscriber side communication device. This is a setting method for setting physical layer control. The other setting method obtains setting input from an external switch or the like using the hardware strap function (bootstrap function) of the LAN side physical layer control circuit, and the subscriber side If it is a setting method to set physical layer control in the LAN side physical layer control circuit in the communication device There is a match. Here, the hardware strap function (bootstrap function) refers to a function that automatically performs a predetermined operation when the hardware is activated (at the time of activation state transition).

  As a communication system of a setting method for setting physical layer control in the LAN-side physical layer control circuit using the MDIO interface, for example, there is GE-PON (Gigabit Ethernet (registered trademark) Passive Optical Network).

  For example, EPON (Ethernet Passive Optical Network) is a communication system that uses physical switches to set physical layer control in a LAN-side physical layer control circuit using an external switch or the like.

  As described above, when the LAN side physical layer control setting method in the subscriber side communication device is different, each LAN side physical layer control setting is performed independently. May end up. In order to avoid such setting conflicts, there are measures such as providing a separate LAN port corresponding to each setting method, or newly providing a circuit for generating a setting signal standardized by a plurality of setting methods. This is required in the subscriber side communication device.

  Here, the LAN-side physical layer control settings include control settings such as auto-negotiation enable / disable, link-up speed, and duplex of the subscriber-side communication device.

  As described above, providing a LAN port corresponding to each LAN-side physical layer control setting method in the subscriber-side communication device, or providing a circuit for generating a unified setting signal in the subscriber-side communication device However, there has been a problem that the apparatus is increased and the cost is increased.

  The present invention has been made to solve the above-described problems, and prevents setting conflicts in LAN-side physical layer control in each setting method without newly providing a LAN port or a circuit for setting signal unification. An object of the present invention is to provide a communication device and a communication method that can communicate with a plurality of higher-order networks of different communication methods.

Communication apparatus according to an aspect of the present invention, there is provided a lower communication device capable of communicating with the higher-level network in a plurality of different communication methods of setting the physical layer controller in communication with pre-Symbol-level network, corresponding to each of the communication system A plurality of communication control circuits, a physical layer control circuit that communicates with each of the communication control circuits and controls a physical layer in a hierarchical structure of a communication protocol, common to the plurality of communication control circuits, and the physical A plurality of LAN ports that communicate with the plurality of communication control circuits, and each of the communication control circuits communicates with the corresponding communication method according to each case. against setting different physical layer control corresponding to each of said communication system is performed, the physical layer control circuit, according to the physical layer control is set, the LAN port And controlling the physical layer in Shin.

  According to an aspect of the present invention, there is provided a communication method including: the communication device described above; and a plurality of upper networks that perform communication in correspondence with each of the plurality of communication control circuits in the communication device. The physical layer control setting in the physical layer control circuit common to a plurality of the communication control circuits that communicates with the circuit and controls the physical layer in the hierarchical structure of the communication protocol is transmitted from any of the upper networks. Is switched according to whether or not it is received.

  According to the above aspect of the present invention, the communication control circuit controls the physical layer control circuit according to the setting of the physical layer control according to which of the upper networks the communication control circuit has received a signal. By doing so, it is possible to prevent contention for setting of the LAN-side physical layer control in each setting method without newly providing a LAN port or a circuit for unifying setting signals.

It is a figure which shows notionally the structure of the communication system regarding embodiment of this invention. It is a figure which shows notionally the structure of the subscriber side communication apparatus regarding embodiment. It is the sequence diagram which showed the operation | movement of the subscriber side communication apparatus regarding embodiment of this invention. It is a figure which shows notionally the structure of the communication system regarding embodiment of this invention. It is the sequence diagram which showed the operation | movement of the subscriber side communication apparatus regarding embodiment of this invention. It is the sequence diagram which showed the operation | movement of the subscriber side communication apparatus regarding embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<First Embodiment>
<Configuration>
FIG. 1 is a diagram conceptually showing the configuration of a communication system according to the first embodiment of the present invention.

  As shown in FIG. 1, in the communication system 100, a station side communication apparatus 1 (OLT: Optical Line Terminal) that uses an optical signal with a wavelength λa for downlink data communication and an optical signal with a wavelength λc for uplink data communication. A subscriber-side communication device 2 (ONU: Optical Network Unit) as a plurality of communication devices that communicate with a higher-level network via the station-side communication device 1 in common, the station-side communication device 1 and a plurality of subscriber sides An optical fiber cable 3 for connecting the communication device 2 and a star coupler 4 as an optical splitter for branching from the station side communication device 1 to a plurality of subscriber side communication devices 2 are provided.

  FIG. 2 is a diagram conceptually showing the configuration of the subscriber side communication apparatus 2 relating to the first embodiment of the present invention.

  The wavelength division multiplexing coupler 6 transmits and receives optical signals to and from the station side communication device 1. An optical signal with wavelength λc is transmitted in the upstream direction, and an optical signal with wavelength λa is received in the downstream direction.

  The wavelength division multiplex coupler 6 divides and outputs the optical signals having the wavelengths λa and λb in the downstream direction.

  The wavelength division multiplexing filter 10 outputs the optical signal having the wavelength λb input from the wavelength division multiplexing coupler 6 to the downstream photoelectric conversion circuit 8, and the optical signal having the wavelength λc input from the electrooptical conversion circuit 9 as the wavelength. Output to the division multiplexing coupler 6.

  The photoelectric conversion circuit 7 converts the optical signal having the wavelength λa input from the wavelength division multiplexing coupler 6 into an electrical signal and outputs the electrical signal to the PON control circuit 11.

  The photoelectric conversion circuit 8 converts the optical signal having the wavelength λb input from the wavelength division multiplexing filter 10 into an electrical signal and outputs the electrical signal to the PON control circuit 12 and the multiplexer 13 (multiplexer).

  The electro-optical conversion circuit 9 converts the electric signal input from the multiplexer 13 into an optical signal having a wavelength λc and outputs the optical signal to the wavelength division multiplexing filter 10.

  The PON control circuit 11 (first communication control circuit) is a control circuit that communicates with the station-side communication device 1 that uses an optical signal having a wavelength λa for downlink data communication. Details of the operation will be described later.

  The PON control circuit 12 (second communication control circuit) is a control circuit that communicates with the station-side communication device 5 that uses an optical signal having a wavelength λb for downlink data communication. Details of the operation will be described later.

  The multiplexer 13 receives both the upstream data signals input from the PON control circuit 11 and the PON control circuit 12, and based on the electrical signal (multiplexer control signal) input from the photoelectric conversion circuit 8, the electrical / optical conversion circuit Select the output signal to 9.

  The layer 2 switch control circuit 14 performs data communication among the PON control circuit 11, the PON control circuit 12, and the physical layer control circuit 15.

  The physical layer control circuit 15 performs data communication among the PON control circuit 12, the LAN port 17, and the layer 2 switch control circuit 14. The physical layer control circuit 15 controls the physical layer in the communication protocol hierarchical structure. More specifically, operations such as auto-negotiation enable / disable, link-up speed, and duplex in the LAN port 17 are controlled. The physical layer control circuit 15 receives a first reset signal from the PON control circuit 11 and a physical layer control setting signal from the physical layer external setting switch 16.

  The physical layer external setting switch 16 outputs a physical layer control setting signal to the physical layer control circuit 15 and performs setting in the physical layer control circuit 15.

  The LAN port 17 is connected to the LAN and communicates with the physical layer control circuit 15.

  The ONU-ID external setting switch 18 sets the registration number of the subscriber side communication device 2 and outputs an ONU-ID setting signal to the PON control circuit 11 and the PON control circuit 12.

<Operation>
Next, the operation of the subscriber side communication device 2 as a communication device according to the present embodiment of the present invention will be described.

  First, the subscriber side communication device 2 cancels the reset of the physical layer control circuit 15 after the power is turned on, and causes the physical layer control circuit 15 to transition from the stopped state to the activated state. The physical layer control circuit 15 that has transitioned to the start state receives a physical layer control setting signal (bootstrap) indicating the auto negotiation valid / invalid, link-up speed, duplex, and the like set in the physical layer external setting switch 16. Function) and reflect the setting.

  On the other hand, after the power is turned on, the PON control circuit 12 is activated, and after the setting by the physical layer external setting switch 16, the initial setting for the physical layer control circuit 15 is performed by the MDIO interface. Therefore, the physical layer control circuit 15 is rewritten to a setting different from the setting of the physical layer external setting switch 16.

  Thereafter, when the subscriber-side communication device 2 is connected to the station-side communication device 1 via the optical fiber cable 3, the downstream optical signal having the wavelength λa input from the station-side communication device 1 is divided by the wavelength division multiplexing coupler 6. And input to the photoelectric conversion circuit 7.

  In the photoelectric conversion circuit 7, the input optical signal is converted into an electrical signal and output to the PON control circuit 11.

  Since the signal received by the PON control circuit 11 is an electronic signal obtained by converting the downstream optical signal having the wavelength λa by the photoelectric conversion circuit 7, the communication device connected to the subscriber-side communication device 2 can communicate with the station-side communication. It can be seen that it is device 1. The PON control circuit 11 outputs an uplink signal for the link-up sequence to the multiplexer 13 in order to perform a logical link-up sequence with the station side communication device 1.

  On the other hand, in the photoelectric conversion circuit 8, a multiplexer control signal indicating that the multiplexer 13 selects and outputs the input signal from the PON control circuit 11 based on the fact that the optical signal having the wavelength λb is not received is supplied to the multiplexer 13. Output to.

  The upstream signal from the PON control circuit 11 input to the multiplexer 13 is converted into an optical signal having a wavelength λc by the electro-optic conversion circuit 9, and the station side communication is performed via the wavelength division multiplexing filter 10 and the wavelength division multiplexing coupler 6. It is output to the device 1.

  When the logical link between the PON control circuit 11 and the station side communication device 1 is established in this way, the PON control circuit 11 outputs a first reset signal (pulse signal) to the physical layer control circuit 15. The physical layer control circuit 15 is temporarily stopped by the first reset signal.

  When the first reset signal ends, the physical layer control circuit 15 transitions to the activated state again, and the physical layer control setting signal set by the physical layer external setting switch 16 is transferred to the hardware strap function of the physical layer control circuit 15. Import by (Bootstrap function) and reflect the setting.

  On the other hand, the PON control circuit 11 outputs a second reset signal (continuation signal) to the PON control circuit 12 when the logical link between the PON control circuit 11 and the station side communication device 1 is established. The PON control circuit 12 is stopped by the second reset signal.

  By keeping the PON control circuit 12 in a stopped state, it is possible to prevent a setting change from the PON control circuit 12 by the MDIO interface during communication with the station side communication device 1.

  Further, when the power of the subscriber side communication device 2 is turned off or the connection with the optical fiber cable 3 is disconnected, the above sequence is performed again when the power is turned on or the optical fiber cable 3 is reconnected. The setting of the physical layer control in the control circuit 15 reflects the setting of the physical layer external setting switch 16 by the hardware strap function (bootstrap function) of the physical layer control circuit 15.

  FIG. 3 is a sequence diagram showing the above operation (when connected to the station side communication device 1).

  In FIG. 3, in order from the top, the logical link up state 101 of the PON control circuit 11, the first reset signal 102 from the PON control circuit 11 to the physical layer control circuit 15, the activation state of the physical layer control circuit 15, MDIO signal 103 from the control circuit 12 to the physical layer control circuit 15, the setting state 104 of physical layer control of the physical layer control circuit 15, the second reset signal 105 from the PON control circuit 11 to the PON control circuit 12, and the PON control circuit 12 Each of the activation states is shown.

  In the first reset signal 102, when the waveform is low, it indicates that the reset signal is input and the physical layer control circuit 15 is stopped. When the waveform is high, the reset signal is not input and the physical layer control circuit 15 Indicates that it is in an active state.

  In the second reset signal 105, when the waveform is low, the reset signal is input and the PON control circuit 12 is stopped. When the waveform is high, the reset signal is not input and the PON control circuit 12 is activated. It is shown that.

  In the physical layer control circuit 15 of the subscriber side communication device 2, the setting by the physical layer external setting switch 16 is once reflected by the hardware strap function (bootstrap function) of the physical layer control circuit 15 when the power is turned on. Thereafter, the PON control circuit 12 is activated by power activation, and the initial setting is reflected by the MDIO signal.

  However, when the PON control circuit 11 and the station side communication device 1 are connected and a logical link is established, the first reset signal (pulse signal) from the PON control circuit 11 is input to the physical layer control circuit 15, and the physical layer control circuit 15. The setting by the physical layer external setting switch 16 is reflected again by the hardware strap function (bootstrap function).

  At this time, by outputting the second reset signal (continuation signal) to the PON control circuit 12, setting change by the MDIO interface can be prevented.

  As described above, in the optical communication system according to the first embodiment of the present invention, there is no setting conflict between the setting by the physical layer external setting switch 16 and the setting by the setting control frame, and the LAN port is shared. This is feasible and can reduce the device capacity and cost.

<Effect>
According to the embodiment of the present invention, the communication device is a subscriber-side communication device 2 as a lower-level communication device capable of communicating with a plurality of higher-level networks having different communication methods, and communicates with each higher-level network. PON control circuit 11 and PON control circuit 12 as a plurality of communication control circuits provided corresponding to the network, and a plurality of PON controls that communicate with each PON control circuit and control the physical layer in the hierarchical structure of the communication protocol A physical layer control circuit 15 common to the circuits, and a LAN port 17 that communicates with the physical layer control circuit 15 and is common to a plurality of PON control circuits.

  Different physical layer control settings are made for the physical layer control circuit 15 in accordance with each case where each PON control circuit communicates with the corresponding upper network. The physical layer control circuit 15 controls the physical layer in the communication of the LAN port 17 according to the set physical layer control. The setting of the physical layer control is performed by the PON control circuit controlling the physical layer control circuit 15 according to which upper network the PON control circuit has received a signal.

  According to such a configuration, by changing the physical control setting of the physical layer control circuit 15 common to the plurality of PON control circuits according to which upper network the PON control circuit has received the signal, Control of the physical layer in communication of the common LAN port 17 can be performed without setting conflict. Therefore, it is possible to suppress an increase in device capacity and cost due to the provision of a new LAN port or a circuit for unifying setting signals.

  Further, according to the embodiment of the present invention, when communication is established between each PON control circuit and each upper network corresponding to the PON control circuit, the PON control circuit is connected to the physical layer control circuit 15 corresponding to another PON control circuit. Stop the layer control setting.

  According to such a configuration, the setting of the physical layer control of the physical layer control circuit 15 may be changed corresponding to the other PON control circuit while one PON control circuit communicates with the corresponding upper network. No configuration conflicts can be avoided.

  Further, according to the embodiment of the present invention, each PON control circuit communicates with a corresponding upper network based on an optical signal having a specific wavelength.

  According to such a configuration, a PON control circuit that performs communication according to the wavelength of the optical signal received from each upper network can be used properly.

Second Embodiment
<Configuration>
FIG. 4 is a diagram conceptually illustrating a configuration of a communication system according to the second embodiment of the present invention. A communication system 100A shown in FIG. 4 is a communication system that can be switched to 100 shown in FIG. Note that the switchable communication system is not limited to the communication system 100 and the communication system 100A. For example, three or more communication systems may be switchable.

  As shown in FIG. 4, in the communication system 100A, a station-side communication device 5 that uses an optical signal with a wavelength λb for downlink data communication and an optical signal with a wavelength λc for uplink data communication, and the station-side communication device 5 A subscriber-side communication device 2 as a plurality of communication devices that communicate with a host network in common, an optical fiber cable 3 that connects the station-side communication device 1 and the plurality of subscriber-side communication devices 2, and a station And a star coupler 4 as an optical splitter for branching from the side communication device 1 to a plurality of subscriber side communication devices 2.

<Operation>
Next, the operation of the subscriber side communication device 2 as a communication device according to the present embodiment of the present invention will be described.

  First, the subscriber side communication device 2 cancels the reset of the physical layer control circuit 15 after the power is turned on, and causes the physical layer control circuit 15 to transition from the stopped state to the activated state. The physical layer control circuit 15 that has transitioned to the start state receives a physical layer control setting signal (bootstrap) indicating the auto negotiation valid / invalid, link-up speed, duplex, etc. set by the physical layer external setting switch 16. Function) and reflect the setting.

  On the other hand, after the power is turned on, the PON control circuit 12 is activated, and after the setting by the physical layer external setting switch 16 described above, initial setting is performed on the physical layer control circuit 15 by the MDIO interface. Therefore, the physical layer control circuit 15 is rewritten to a setting different from the setting of the physical layer external setting switch 16.

  Thereafter, when the subscriber side communication device 2 is connected to the station side communication device 5 via the optical fiber cable 3, the downstream optical signal having the wavelength λb input from the station side communication device 5 is divided by the wavelength division multiplexing coupler 6. And input to the wavelength division multiplex filter 10.

  The wavelength division multiplexing filter 10 outputs an optical signal having a wavelength λb to the photoelectric conversion circuit 8. The photoelectric conversion circuit 8 converts the input optical signal into an electrical signal and outputs it to the PON control circuit 12.

  Since the signal received by the PON control circuit 12 is an electronic signal obtained by converting the downstream optical signal having the wavelength λb by the photoelectric conversion circuit 8, the communication device connected to the subscriber-side communication device 2 can communicate with the station-side communication. It can be seen that the device 5. The PON control circuit 12 outputs an uplink signal for the link-up sequence to the multiplexer 13 in order to perform a logical link-up sequence with the station side communication device 5.

  On the other hand, the photoelectric conversion circuit 8 receives a multiplexer control signal indicating that the multiplexer 13 selects and outputs the input signal from the PON control circuit 12 based on the reception of the optical signal having the wavelength λb. Output to.

  The upstream signal from the PON control circuit 12 input to the multiplexer 13 is converted into an optical signal having a wavelength λc by the electro-optic conversion circuit 9, and the station side communication is performed via the wavelength division multiplexing filter 10 and the wavelength division multiplexing coupler 6. It is output to the device 5.

  When the logical link between the PON control circuit 12 and the station side communication device 5 is established in this manner, the auto-negotiation is enabled / disabled and the link up of the physical layer control circuit 15 using the setting control frame from the station side communication device 5. It is possible to change physical layer settings such as speed and duplex.

  When the station side communication device 5 transmits a setting control frame for changing the setting of the physical layer control circuit 15, the PON control circuit 12 terminates the setting control frame, and sets the physical layer setting of the physical layer control circuit 15 via the MDIO interface. change.

  Further, when the power of the subscriber side communication device 2 is turned off or the connection with the optical fiber cable 3 is disconnected, the above sequence is performed again when the power is turned on or the optical fiber cable 3 is reconnected. The setting in the control circuit 15 reflects the setting using the setting control frame from the station side communication device 5.

  FIG. 5 is a sequence diagram showing the above operation (when connected to the station side communication device 5).

  In FIG. 5, in order from the top, the logical link up state 106 of the PON control circuit 12, the first reset signal 102 from the PON control circuit 11 to the physical layer control circuit 15, and the activation state of the physical layer control circuit 15, PON MDIO signal 103 from the control circuit 12 to the physical layer control circuit 15, the setting state 104 of physical layer control of the physical layer control circuit 15, the second reset signal 105 from the PON control circuit 11 to the PON control circuit 12, and the PON control circuit 12 Each of the activation states is shown.

  In the first reset signal 102, when the waveform is low, it indicates that the reset signal is input and the physical layer control circuit 15 is stopped. When the waveform is high, the reset signal is not input and the physical layer control circuit 15 Indicates that it is in an active state.

  In the second reset signal 105, when the waveform is low, the reset signal is input and the PON control circuit 12 is stopped. When the waveform is high, the reset signal is not input and the PON control circuit 12 is activated. It is shown that.

  In the physical layer control circuit 15 of the subscriber side communication device 2, the setting by the physical layer external setting switch 16 is once reflected by the hardware strap function (bootstrap function) of the physical layer control circuit 15 when the power is turned on. Thereafter, the PON control circuit 12 is activated by power activation, and the initial setting is reflected by the MDIO signal.

  Thereafter, when the PON control circuit 12 and the station side communication device 5 are connected and a logical link is established, the physical layer of the physical layer control circuit 15 of the subscriber side communication device 2 is used by using the setting control frame from the station side communication device 5. The setting can be changed. Since the logical link between the PON control circuit 11 and the station-type communication apparatus 1 is not established while the logical link is established, the first reset signal is not output from the PON control circuit 11. Setting by the physical layer external setting switch 16 is not performed.

  As described above, in the optical communication system according to the second embodiment of the present invention, there is no setting conflict between the setting by the physical layer external setting switch 16 and the setting by the setting control frame, and the LAN port is shared. This is feasible and can reduce the device capacity and cost.

<Effect>
According to the embodiment of the present invention, the setting of the physical layer control is performed by the PON control circuit controlling the physical layer control circuit 15 according to which upper network the PON control circuit has received the signal. .

  According to such a configuration, by changing the physical control setting of the physical layer control circuit 15 common to the plurality of PON control circuits according to which upper network the PON control circuit has received the signal, Control of the physical layer in communication of the common LAN port 17 can be performed without setting conflict. Therefore, it is possible to suppress an increase in device capacity and cost due to the provision of a new LAN port or a circuit for unifying setting signals.

<Third Embodiment>
<Configuration>
In the third embodiment of the present invention, the operation when switching the subscriber side communication device 2 from the communication system connected to the station side communication device 1 to the communication system connected to the station side communication device 5 will be described.

<Operation>
In the communication system connected to the station side communication device 1, the setting by the physical layer external setting switch 16 is reflected in the setting of the physical layer control of the physical layer control circuit 15. The ONU registration number setting by the ONU-ID external setting switch 18 is notified from the PON control circuit 11 to the station side communication apparatus 1.

  When the optical fiber cable 3 is removed in this state, the logical link between the subscriber side communication device 2 and the station side communication device 1 is disconnected. Then, the second reset signal from the PON control circuit 11 to the PON control circuit 12 that was continuously output while the logical link was established between the PON control circuit 11 and the upper network is not output, and PON control is performed. The circuit 12 transitions to the activated state. Then, the PON control circuit 12 performs initial setting for the physical layer control circuit 15 through the MDIO interface.

  After that, when the station side communication device 5 and the subscriber side communication device 2 are connected via the optical fiber cable 3 and the logical link up between the PON control circuit 12 and the station side communication device 5 is established, the station side communication is performed. The communication system is switched to the communication system connected to the device 5, and the physical layer setting of the physical layer control circuit 15 can be changed using the setting control frame from the station side communication device 5.

  Here, by sharing the ID registration number by the ONU-ID external setting switch 18 between the PON control circuit 11 and the PON control circuit 12, the setting of the ONU-ID external setting switch 18 at the time of switching the communication system. Change work can be reduced.

  Next, the case where the subscriber side communication device 2 is switched from the communication system connected to the station side communication device 5 to the communication system connected to the station side communication device 1 will be described.

  In the communication system connected to the station side communication device 1, the setting by the setting control frame from the station side communication device 5 is reflected in the control setting of the physical layer control circuit 15. The ONU registration number setting by the ONU-ID external setting switch 18 is notified from the PON control circuit 12 to the station side communication device 5.

  When the optical fiber cable 3 is removed in this state, the logical link between the subscriber side communication device 2 and the station side communication device 5 is disconnected.

  Thereafter, when the station side communication device 1 and the subscriber side communication device 2 are connected via the optical fiber cable 3 and the logical link up between the PON control circuit 11 and the station side communication device 1 is established, the station side communication is performed. Switching to the communication system connected to the apparatus 1 causes the PON control circuit 11 to output a first reset signal (pulse signal) to the physical layer control circuit 15. The physical layer control circuit 15 is temporarily stopped by the first reset signal.

  When the first reset signal ends, the physical layer control circuit 15 transitions to the activated state again, and the physical layer setting signal set by the physical layer external setting switch 16 is transferred to the hardware strap function ( Bootstrap function) and reflect the setting.

  On the other hand, the PON control circuit 11 outputs a second reset signal (continuation signal) to the PON control circuit 12 when the logical link between the PON control circuit 11 and the station side communication device 1 is established. The PON control circuit 12 is stopped by the second reset signal.

  By keeping the PON control circuit 12 in the stopped state, it is possible to prevent (continuously) setting changes from the PON control circuit 12 using the MDIO interface during communication with the station side communication device 1.

  Here, by sharing the registration number by the ONU-ID external setting switch 18 between the PON control circuit 11 and the PON control circuit 12, the setting change of the ONU-ID external setting switch 18 at the time of switching the communication system is performed. Work can be reduced.

  FIG. 6 is a sequence diagram showing the above-described operation (system switching between the station-side communication device 1 and the station-side communication device 5).

  In FIG. 6, in order from the top, the logical link up state 107 of the PON control circuit, the first reset signal 102 from the PON control circuit 11 to the physical layer control circuit 15, the activation state of the physical layer control circuit 15, and the PON control The MDIO signal 103 from the circuit 12 to the physical layer control circuit 15, the physical layer control setting state 104 of the physical layer control circuit 15, the second reset signal 105 from the PON control circuit 11 to the PON control circuit 12, and the PON control circuit 12 Each startup state is shown.

  In the first reset signal 102, when the waveform is low, it indicates that the reset signal is input and the physical layer control circuit 15 is stopped. When the waveform is high, the reset signal is not input and the physical layer control circuit 15 Indicates that it is in an active state.

  In the second reset signal 105, when the waveform is low, the reset signal is input and the PON control circuit 12 is stopped. When the waveform is high, the reset signal is not input and the PON control circuit 12 is activated. It is shown that.

  The physical layer control circuit 15 of the subscriber side communication device 2 can determine the connected station side communication device even if the system is switched after activation, and can switch the setting of the LAN side physical layer for each station side communication device. It is.

  As described above, in the optical communication system according to the third embodiment of the present invention, setting conflict may occur between the setting by the physical layer external setting switch 16 and the setting by the setting control frame even when the system is switched. The LAN port can be shared.

<Effect>
According to the embodiment of the present invention, when communication between the PON control circuit 11 and the corresponding upper network is interrupted, the PON control circuit 11 stops outputting the second reset signal output to the PON control circuit 12. To do.

  According to such a configuration, switching can be performed.

  Further, according to the embodiment of the present invention, the ID registration number set in each communication method is used in common between the PON control circuit 11 and the PON control circuit 12.

  According to such a configuration, an ID registration number setting change operation by the ONU-ID external setting switch 18 at the time of system switching can be omitted.

  In addition, within the scope of the present invention, the present invention can be freely combined with each embodiment, modified with any component in each embodiment, or omitted with any component in each embodiment.

  1, 5 Station side communication device, 2 Subscriber side communication device, 3 Optical fiber cable, 4 Star coupler, 6 Wavelength division multiplexing coupler, 7, 8 Photoelectric conversion circuit, 9 Electrooptical conversion circuit, 10 Wavelength division multiplexing filter, 11, 12 PON control circuit, 13 multiplexer, 14 layer 2 switch control circuit, 15 physical layer control circuit, 16 physical layer external setting switch, 17 LAN port, 18 ONU-ID external setting switch, 100, 100A communication system.

Claims (9)

A lower-level communication device capable of communicating with a higher-level network using a plurality of communication methods with different physical layer control setting methods ,
Communicating with previous SL upper network, a plurality of communication control circuit provided in correspondence to each of said communication system,
A physical layer control circuit common to a plurality of the communication control circuits, which communicates with each of the communication control circuits and controls a physical layer in a hierarchical structure of a communication protocol;
A plurality of LAN ports that communicate with the physical layer control circuit and are common to the plurality of communication control circuits;
Depending on each case where each of the communication control circuit to communicate with each of said communication mode corresponding, the physical layer control circuit to set the different physical layer control corresponding to each of said communication system is performed,
The physical layer control circuit, according to the physical layer control which is set, and controls the physical layer in a communication of the LAN ports,
Communication device. If you communication established with the higher-level network by each of said communication methods corresponding to each of said communication control circuit, before Symbol physical that correspond to different other of the communication control circuit with the communication control circuit to the physical layer control circuit It is characterized by stopping the setting of layer control,
The communication apparatus according to claim 1. The communication device is a lower-level communication device in a PON communication system,
The communication device according to claim 1 or 2. Each of the communication control circuits communicates with the corresponding upper network based on an optical signal of a specific wavelength,
The communication apparatus in any one of Claims 1-3. Based on the setting by the physical layer external setting switch, the setting of the physical layer control corresponding to the first communication control circuit among the plurality of communication control circuits is performed,
The physical layer control setting corresponding to a second communication control circuit among the plurality of communication control circuits is performed based on a setting control frame from the upper network. The communication apparatus in any one. After the communication between the first communication control circuit and the corresponding upper network is established, the first communication control circuit outputs a first reset signal to the physical layer control circuit, whereby the hardware of the physical layer control circuit The physical layer control is set by the wear strap function,
After the communication between the first communication control circuit and the corresponding upper network is established, the first communication control circuit outputs a second reset signal to the second communication control circuit, whereby the second communication control circuit Is stopped,
After the communication between the second communication control circuit and the corresponding upper network is established, the physical layer control is set based on the setting control frame using the MDIO interface in the activated state of the second communication control circuit. It is characterized by being performed,
The communication device according to claim 5. When communication between the first communication control circuit and the corresponding upper network is interrupted, the first communication control circuit stops outputting the second reset signal output to the second communication control circuit. It is characterized by
The communication apparatus according to claim 6. An ID registration number set in each communication method is used in common between the first communication control circuit and the second communication control circuit,
The communication apparatus according to any one of claims 5 to 7. A communication device according to any one of claims 1 to 8, in a communication method for communicating with the upper network by a plurality of communication scheme corresponding to each of the plurality of the communication control circuit in the communication device,
The communication control circuit communicates with each of the communication control circuits and controls a physical layer in a hierarchical structure of a communication protocol, and a physical layer control setting in a physical layer control circuit common to the plurality of communication control circuits is any of the communication control circuits. It is possible to switch depending on whether a signal by a communication method is received,
Communication method.

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