JP5097516B2 - Control signal communication method, optical transceiver system, and optical transceiver device - Google Patents

Description

  According to the present invention, the management apparatus connected to the optical transceiver device that stores the unique information of the own device and performs the conversion process between the optical signal and the electric signal has the unique information stored in the optical transceiver device predetermined. The present invention relates to a control signal communication method, an optical transceiver system, and an optical transceiver device that determine whether or not the information is unique information.

  Conventionally, in optical communication technology, after converting a differential electrical signal to an optical signal, an optical transmission function for outputting to an optical fiber through an optical connector, and an optical reception function for converting an optical signal input from the optical connector into an electrical signal An optical transceiver device is used. Such an optical transceiver device is mounted on, for example, a package based on MSA (Multi Source Agreement), which is defined as a global standard (see, for example, Patent Document 1). Such an optical transceiver device responds to a control signal transmitted to a predetermined address in I2C communication from a management device existing outside by a 2-wire serial (I2C, Inter-Integrated Circuit) interface, It has a function of transmitting information such as state information inside the own apparatus and unique information stored in advance in unique information storage means of the own apparatus to the management apparatus.

Equipment manufacturers of such optical transceiver devices store special encryption information as unique information inside the optical transceiver device in order to ensure that the optical transceiver device has the quality certified by the company. Sometimes. In an optical transceiver system in which such an optical transceiver device is used, a management device that controls the optical transceiver device periodically reads unique information stored in advance in the optical transceiver device, and the legitimacy of the read unique information. And a signal indicating whether or not to operate the optical transceiver device is transmitted. The optical transceiver device is configured to operate when such a signal indicates to operate the optical transceiver device.
JP 2007-264438 A

However, in the validity determination processing as described above, if the unique information stored in advance in the optical transceiver device is read and the similar unique information is stored in the optical transceiver device of another copy product, the management device The side cannot determine whether it is genuine.
In particular, in recent years, optical transceiver devices capable of hot-swapping are becoming widespread, and in an optical transceiver system using such an optical transceiver device, the system itself can be replaced by replacing the module of the failed optical transceiver device. There is an advantage that it can be easily restored. On the other hand, the advantage that the individual optical transceiver device can be easily replaced increases the chance that the copy product is used. Such a copy product does not always have the same quality as the regular product, and its operation may be unstable, and the reliability of the entire optical transceiver system is reduced. Here, it is desirable that such an optical transceiver device can appropriately determine whether or not it is previously certified by the device manufacturer.

  The present invention has been made in view of such a situation, and a control signal capable of appropriately determining whether or not an optical transceiver device used in an optical transceiver system is a predetermined regular product. A communication method, an optical transceiver system, and an optical transceiver device are provided.

To solve the problems described above, the present invention stores specific information of the self apparatus, have rows conversion between optical and electrical signals, a first communication means for performing communication using the first communication system Whether or not the management device connected to the optical transceiver device including the second communication means for performing communication by the second communication method is the unique information stored in the optical transceiver device. The encryption key setting signal receiving means of the optical transceiver device receives the encryption key setting signal according to the first communication method from the management device via the first communication means. And when the encryption key setting signal receiving means receives the encryption key setting signal, the communication control means switches the communication means of its own device from the first communication means to the second communication means, and the encryption key. Receive Stage, from the management device, receiving the encryption key information via the second communication unit, the encryption information generating means, the encryption key information received by the encryption key reception means, specific information stored in the own device And generating the encryption information by a predetermined encryption algorithm, and when the encryption information generation means generates the encryption information, the communication control means changes the communication means of its own device to the second communication means. And the step of switching to the first communication means, and when the cipher information output means receives the unique information request from the management device via the first communication means , outputs the cipher information generated by the cipher information generation means. And the management device decrypts the encryption information output from the encryption information output means by a decryption algorithm corresponding to the encryption algorithm, A control signal communication method characterized by and a step of determining whether or not consistent with the unique information to the eye optical transceiver device.

  Further, the present invention is characterized in that the management device described above transmits an encryption key setting signal to the optical transceiver device within a predetermined time after the optical transceiver device is powered on.

Further, the present invention stores the unique information of the device itself, an optical transceiver device that performs a conversion process between an optical signal and an electrical signal, and the unique information stored in the optical transceiver device that is connected to the optical transceiver device. An optical transceiver system including a management device that determines whether or not the received information is unique information, wherein the optical transceiver device includes a first communication unit that performs communication according to a first communication method, and a second communication method. Second communication means for performing communication according to the above, an encryption key setting signal receiving means for receiving an encryption key setting signal according to the first communication method from the management device via the first communication means, and reception of the encryption key setting signal means, upon receiving the encryption key setting signal, the communication means of the apparatus, the first communication unit, a communication control means for switching the second communication means, from the management device via the second communication means And encryption key reception means for receiving a No. key information, and encryption key information received by the encryption key reception means, based on the unique information stored in the own device, generates an encryption information according to a predetermined encryption algorithm An encryption information generation means, and the communication control means switches the communication means of its own device from the second communication means to the first communication means when the encryption information generation means generates the encryption information, and the optical transceiver device from the management device, if via the first communication means for receiving the unique information request includes a cryptographic information output means to output the encrypted information generated by the encryption information generating unit, the management unit, the encryption information output The encrypted information output by the means is decrypted by a decryption algorithm corresponding to the encryption algorithm, and the decrypted information is predetermined information specific to the optical transceiver device. An optical transceiver system, characterized by comprising determining match or otherwise.

The present invention is also an optical transceiver device that outputs unique information stored in advance in its own device to the management device in response to a unique information request received from the management device, and performs communication using the first communication method. The first communication means, the second communication means for performing communication by the second communication method, and the encryption for receiving the encryption key setting signal by the first communication method from the management device via the first communication means. When the key setting signal receiving means and the encryption key setting signal receiving means receive the encryption key setting signal, the communication control means for switching the communication means of the own device from the first communication means to the second communication means, and management Based on encryption key receiving means for receiving encryption key information from the apparatus via the second communication means, encryption key information received by the encryption key receiving means, and unique information stored in the own apparatus. Encrypted And an encryption information generating means for generating encryption information by algorithm, the communication control unit, the encryption information generating means, when generating the encryption information, a communication unit of the apparatus, the second communication means, first switching to the communication means, an optical transceiver device, the management device receives the unique information request via the first communication means, comprise a cryptographic information output means to output the encrypted information generated by the encryption information generating means An optical transceiver device characterized by the following.

  As described above, according to the present invention, the optical transceiver apparatus receives the encryption key information from the management apparatus, generates the encryption information using the encryption key information and the pre-stored unique information, and manages it. This encryption information is returned in response to a unique information request from the device. Then, the management device decrypts such encrypted information, and when it can be decrypted, the management device determines that the unique information is predetermined unique information. The optical transceiver device is genuine by determining whether or not it has a function of storing predetermined unique information and outputting the encrypted information generated based on the received encryption key as unique information. It can be determined whether or not.

  Further, according to the present invention, when the above-described optical transceiver device receives an encryption key setting signal according to the first communication method from the management device, the optical transceiver device is changed to receive information according to the second communication method. Since the encryption key information is received depending on the method, even if another device is connected to the communication bus according to the first communication method, the encryption key information is received without affecting the other device. can do.

  In the present invention, the management device described above transmits an encryption key setting signal to the optical transceiver device within a predetermined time after the optical transceiver device is powered on. When the initialization time of the transceiver device is determined, it is possible to control to perform processing related to the encryption information within the initialization time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an optical transceiver system in which an optical transceiver device according to the present embodiment and a management device transmit and receive control signals.
The optical transceiver system according to the present embodiment includes a plurality of optical transceiver devices such as an optical transceiver device 100-1, an optical transceiver device 100-2,..., A management device 200, a bus expansion device 300, and a communication bus. SCL (Serial Clock Line) line 401 and SDA (Serial Data Line) line 402 are provided. Hereinafter, a plurality of optical transceiver devices of the optical transceiver device 100-1, the optical transceiver device 100-2,... Will be described as the optical transceiver device 100 unless it is particularly necessary to distinguish between individual optical transceiver devices.

  The SCL line 401 and the SDA line 402 are communication buses that perform serial communication between devices using I2C (Inter-Integrated Circuit). In I2C communication, a master (management apparatus 200 in the present embodiment) and slaves (in the present embodiment, a plurality of optical transceiver apparatuses 100) are connected in a party line shape with two lines of an SCL line 401 and an SDA line 402. Connect to. In I2C communication, the master transmits a data signal via the SDA line 402 with reference to a CLK signal (SCL (serial clock)) transmitted via the SCL line 401. Here, a multi-master using a plurality of masters is also possible. In this case, any one of the masters is activated to perform communication.

  In such I2C communication, each slave stores an I2C address assigned in advance in the I2C bus. The master sends a signal including the destination I2C address information to the I2C bus, and the slave determines whether the destination of the received signal is the I2C address of its own device. Each time one byte is transferred, an ACK signal is returned from the receiving side, and data transfer is performed while the master and the slave confirm the signal transmission. Here, in addition to the devices shown in FIG. 1, a plurality of devices may be connected via the SCL line 401 and the SDA line 402.

  FIG. 2 is a diagram showing signal transfer timing in such I2C communication. As shown in FIG. 2A, in I2C, information is identified at the rising edge of SCL, and information is output to SDA in synchronization with the falling edge of SCL. In I2C, between the start signal and the stop signal transferred by the master, the control information is transmitted together with the address information of the destination to be transmitted, and the slave designated by the I2C address communicates with the master on a one-to-one basis. Do. Here, in the I2C communication, as shown in FIG. 2B, the stop signal means a signal in which SDA transitions from L (Low) to H (High) when SCL is H (High). . In addition, the start signal is a signal that causes SDA to transition from H to L when SCL is H as shown in FIG. The slave determines whether or not the input signal is a start signal and whether or not the destination address indicated by the signal is its own address.

  The ACK shown in FIG. 2 is an acknowledge signal (ACK signal). In I2C, depending on the software agreement to indicate whether or not data transfer has been performed normally, the device on the sending side, whether master or slave, opens the bus after outputting 8-bit (1 byte) data. ing. The device on the receiving side sets SDA to L for 9 clock cycles and outputs an acknowledge signal (ACK) indicating that 8-bit data has been received.

  Returning to FIG. 1, the bus expansion device 300 is a device that relays signals excluding the SCL line 401 and the SDA line 402, and TxDisable, TxFault, RxLos, RateSelect, MODDEF (described later) of each optical transceiver apparatus 100. 0) and relay of signal transmission / reception between the terminals and the management apparatus 200.

  The optical transceiver device 100 has an optical receiving function for converting an input differential electrical signal into an optical signal, outputting the optical signal to an optical fiber through an optical connector, and converting an optical signal input from the optical connector into an electrical signal. Circuit. Each of the plurality of optical transceiver devices 100 is assigned a port address. FIG. 3 is a block diagram illustrating functions of a general optical transceiver device. As shown in FIG. 3, the optical transceiver device includes a control unit 900 therein. The control unit 900 is a microcontroller (MCU (Micro Controller Unit)) including a calculation unit, a control unit, a storage unit, and the like, and controls the operation of the optical transceiver device. The control unit 900 provides a serial ID function and a digital diagnostic monitor (DDM) function using an I2C interface.

  Here, with the serial ID function, the setting information of the own device (specific information such as usage, transmission medium, transmission distance, vendor name, model number, and serial number) is stored in the storage unit and received from the external management device. This is a function for transmitting the setting information in response to the setting information request and the unique information request. Here, the unique information is identification information unique to each individual of the plurality of optical transceiver devices. Also, the digital diagnostic monitor function refers to the internal state information (power supply voltage, transmitter optical output power, transmitter laser bias current, receiver unit) in response to an internal state information transmission request transmitted from an external management device. (Received power, internal temperature) and the like are transmitted to the management device so that the external management device can monitor the internal state of the optical transceiver device.

  In the MSA, an I2C address that provides such a serial ID function and a digital diagnostic monitor function is defined, and the control unit 900 receives an SCL signal input from the MODDEF (1) terminal and an MODDEF (2) terminal. Upon receiving the input SDA signal, a serial ID function is provided according to a signal destined for the I2C address “A0h”, and a digital diagnostic monitor function is provided according to a signal destined for the I2C address “A2h”. The optical transceiver device 100 according to the present embodiment also has a function in accordance with the MSA standard.

  FIG. 4 is a diagram illustrating a pad arrangement of the optical transceiver device 100. In the optical transceiver device 100, communication terminals 1 to 20 as shown in FIG. 4C are arranged as shown in FIGS. 4A and 4B. The optical transceiver device 100 includes terminals such as TxFault, TxDisable, MODDEF (2), MODDEF (1), MODDEF (0), RateSelect, and RxLos.

  Here, TxFault outputs H (High) when the transmission unit of the optical transceiver device 100 has a failure. TxDisable receives a conversion control signal indicating ON (L) / OFF (H) of the transmission unit from the management apparatus. Here, if the conversion control signal input to TxDisable is L, the issuance control unit 121 performs signal conversion processing between an electric signal and an optical signal, and if it is H, does not perform signal conversion processing. To do. MODDEF (2) is connected to an I2C data line (SDA line 402). MODDEF (1) is connected to an I2C clock line (SCL line 401). MODDEF (0) outputs a signal indicating whether or not a module is inserted. RateSelect performs transmission / reception of a signal for controlling the reception unit band. RxLos outputs an alarm for a decrease in received light.

  FIG. 5 is a block diagram illustrating a functional configuration of the optical transceiver device 100 according to the present embodiment. The optical transceiver apparatus 100 according to the present embodiment includes at least four terminals of a first communication terminal 111, a second communication terminal 112, a third communication terminal 113, and a fourth communication terminal 114, and issuance control. Unit 121, encryption key setting signal reception unit 122, encryption key reception unit 123, encryption information generation unit 124, communication control unit 130, and storage unit 140.

  In the present embodiment, the first communication terminal 111 is the above-described TxDisable terminal. In the present embodiment, the second communication terminal 112 is the above-described RateSelect terminal. In the present embodiment, the third communication terminal 113 is a terminal of the above-described MODDEF (1). That is, the third communication terminal 113 is connected to the SCL line 401. In the present embodiment, the fourth communication terminal 114 is a terminal of the above-described MODDEF (2). That is, the fourth communication terminal 114 is connected to the SDA line 402.

The issuance control unit 121 controls the optical transceiver device 100 to perform signal conversion processing from an electrical signal to an optical signal when a signal indicating ON is input to the first communication terminal 111 (TxDisable).
The encryption key setting signal receiving unit 122 receives the encryption key setting signal input from the management device 200 to the first communication terminal 111 via the communication control unit 130. The encryption key setting signal is a predetermined signal between the management device 200 and the optical transceiver device 100, and is, for example, a repetition pulse of 9 times or more.

The encryption key receiving unit 123 receives the encryption key information input from the management device 200 to the third communication terminal 113 via the communication control unit 130.
Based on the encryption key information received from the encryption key reception unit 123 and the unique information stored in the unique information storage unit 141 of the storage unit 140, the encryption information generation unit 124 performs encryption according to a predetermined encryption algorithm. Generate information. Here, the encryption information generation unit 124 has a function of performing encryption generation processing corresponding to decryption processing performed by the management apparatus 200 described later. Such an encryption algorithm may be a so-called secret key encryption method or a public key encryption method, but it is desirable to perform it by a highly reliable encryption processing method.

  The storage unit 140 is a storage unit that stores information necessary for communication of control information, and includes a unique information storage unit 141 and an encryption information storage unit 142. The unique information storage unit 141 stores unique information predetermined for each optical transceiver device 100. Such unique information is, for example, the serial ID described above. The encryption information storage unit 142 stores the encryption information generated by the encryption information generation unit 124.

  The communication control unit 130 controls a communication method between the optical transceiver device 100 and an external device, and includes a first communication unit 131 and a second communication unit 132. The first communication unit 131 performs I2C communication using a signal input to the third communication terminal 113 as an SCL signal and a signal input to the fourth communication terminal 114 as an SDA signal. The I2C communication performed by the first communication unit 131 requires two communication lines, whereas the second communication unit 132 performs communication by a communication method using one communication line. In the present embodiment, the second communication unit 132 performs communication using a UART (Universal Asynchronous Receiver Transmitter).

  Here, the UART is an integrated circuit for converting a serial signal based on the start-stop synchronization method into a parallel signal and converting in the opposite direction. FIG. 6 is a diagram illustrating a signal received by the UART. FIG. 6 shows the structure of 8-bit information without parity. In the asynchronous method (asynchronous method), a start bit indicating the start of information and a stop bit indicating the end of information are added so as to sandwich information to be transmitted. If there is no information to be transmitted, all stop bits are transmitted. As described above, when the receiving side detects the start bit, it reads the next information. As described above, according to UART, a clock signal like I2C is not required, so that a signal is received by one line. In the present embodiment, the second communication unit 132 receives a signal input to the third communication terminal 113 as serial data.

  Returning to FIG. 5, the management apparatus 200 communicates with each optical transceiver apparatus 100 via the communication bus of the SCL line 401 and the SDA line 402 and transmits and receives control signals and the like. The management apparatus 200 transmits an encryption key setting signal for notifying the optical transceiver apparatus 100 that an encryption key is set via the communication bus. In addition, the management device 200 has a function of transmitting encryption key information used for generating encryption information to the optical transceiver device 100. Further, the management device 200 transmits a unique information request for designating and reading an address corresponding to the encryption information storage unit 142 in the storage unit 140 of the optical transceiver device 100 to the optical transceiver device 100 and correspondingly The encryption information output from the optical transceiver device 100 is received. Further, the management device 200 performs a decryption process on the received encrypted information according to a predetermined encryption algorithm, and when the decrypted information matches the predetermined unique information of the optical transceiver device 100, the optical transceiver A conversion control signal indicating that the first communication terminal 111 of the apparatus 100 performs conversion processing between an optical signal and an electric signal is transmitted.

Next, with reference to FIG. 7, an outline of an operation in which the optical transceiver apparatus 100 according to the present embodiment receives a signal from the management apparatus 200 and stores the encryption key information in the encryption information storage unit 142 will be described. FIG. 7 is a timing chart showing signals transmitted from the management apparatus 200 by the optical transceiver apparatus 100.
Here, in the optical transceiver device 100 compliant with the above-described MSA, the initialization time is defined for 300 ms after the power is turned on and the power supply voltage inside the module rises. However, in reality, the MCU in the optical transceiver device 100 is actually initialized in about 50 ms to 100 ms (period (a) in FIG. 7) after the power is turned on. Here, in this embodiment, the control signal is communicated using the remaining time after the initialization is completed, among the predetermined initialization times.

  Therefore, when the initialization process of the optical transceiver device 100 is completed, the first communication unit 131 monitors a change in the input signal from the management device 200 to the first communication terminal 111 (TxDisable). Then, after the initialization processing time of the optical transceiver device 100, the first communication unit 131 passes the first communication terminal 111 from the management device 200 for 50 ms (period shown in FIG. 7B). If the encryption key setting signal is received, the communication control unit 130 switches the communication unit from the first communication unit 131 to the second communication unit 132 and operates the second communication unit 132.

  Then, the second communication unit 132 monitors a signal input to the second communication terminal 112 (RateSelect). The encryption key receiving unit 123 sends the third communication terminal 113 (MODDEF (1)) via the second communication unit 132 when the input to the second communication terminal 112 (RateSelect) is H. The input is received as encryption key information. When the input received by the second communication unit 132 from the second communication terminal 112 becomes L, the encryption information generation unit 124 stores the encryption key information received by the encryption key reception unit 123 and the unique information storage unit 141. Based on the stored unique information, cryptographic information is generated and written into the cryptographic information storage unit 142. Then, the communication control unit 130 switches the communication unit from the second communication unit 132 to the first communication unit 131 and operates the first communication unit 131. Thereafter, the optical transceiver device 100 communicates with the management device 200 as a normal optical transceiver device.

  In this embodiment, the optical transceiver device 100 uses the initialization time between 300 ms after power-on specified by the optical transceiver device compliant with the above-described MSA as described above, and the encryption key is transmitted from the management device 200 to the encryption key. Receive information. If the management apparatus 200 inputs the encryption key information to the encryption key reception unit 123 at 19.2 kbps, the input can be completed in a time of 520.8 us per port. That is, encryption key information can be transmitted to 128 ports that can be connected by I2C within 150 ms.

Next, an example of an operation in which the optical transceiver device 100 receives encryption key information will be described in detail with reference to a flowchart of FIG.
When the optical transceiver device 100 is powered on, this process is started. The optical transceiver device 100 has a function of measuring time, and measures an elapsed time after the power is turned on. Then, a port such as a communication port is initialized (step S1). Further, the optical transceiver device 100 sets the adjustment value of the light emitting / receiving device (step S2).

  The encryption key setting signal receiving unit 122 receives a signal input from the first communication terminal 111 via the first communication unit 131 for 150 ms after the optical transceiver device 100 is powered on (step S3). ). If the encryption key setting signal receiving unit 122 determines that 150 ms has elapsed after the power is turned on to the optical transceiver device 100 when the first communication terminal 111 receives the signal (step S4-NO). ), The optical transceiver device 100 starts the processing operation of the main loop as the optical transceiver device and starts providing the serial ID function and the digital diagnostic monitor function described above.

  On the other hand, in step S4, the encryption key setting signal receiving unit 122 determines that the time when the first communication terminal 111 receives the signal is within 150 ms after the optical transceiver device 100 is turned on (step S4). -YES), the encryption key setting signal receiving unit 122 determines whether or not the signal received by the first communication terminal 111 is a predetermined encryption key setting signal (step S5). If the encryption key setting signal receiving unit 122 determines that the signal received by the first communication terminal 111 is not the encryption key setting signal as described above, the encryption key setting signal receiving unit 122 Returning to the processing, the signal input to the first communication terminal 111 is monitored (step S5-NO).

  On the other hand, when the encryption key setting signal receiving unit 122 determines in step S5 that the signal received by the first communication terminal 111 is the encryption key setting signal (step S5-YES), the optical transceiver device 100 performs encryption. Switch to key setting mode. That is, the communication control unit 130 changes the communication unit from the first communication unit 131 that performs communication using the first communication method to the second communication unit 132 that performs communication using the second communication method (step S6). ).

  Then, the encryption key receiving unit 123 receives a signal input to the second communication terminal 112 via the second communication unit 132 (step S7). The encryption key receiving unit 123 has a function of measuring time. When the second communication terminal 112 receives a signal, 300 ms has passed after the optical transceiver device 100 is powered on. If determined, the main loop process is started (step S8—NO).

  On the other hand, when the encryption key receiving unit 123 receives the signal input to the second communication terminal 112 via the second communication unit 132 in step S8, the optical transceiver device 100 is powered on. If it is determined that it is within 300 ms (step S8—YES), the encryption key receiving unit 123 determines whether the signal received by the second communication terminal 112 is “H” (step S9). If the encryption key receiving unit 123 determines in step S9 that the received signal is not “H”, it returns to step S7.

  On the other hand, if the encryption key receiving unit 123 determines in step S9 that the signal input to the second communication terminal 112 is “H”, the encryption key receiving unit 123 passes through the second communication unit 132. Then, the signal input from the third communication terminal 113 is received as a UART signal indicating the encryption key information (step S10). The encryption information generation unit 124 stores in advance in the storage area of the encryption information generation unit 124 based on the encryption key information received by the encryption key reception unit 123 in step S10 and the unique information stored in the unique information storage unit 141. Encryption information is generated according to the encryption algorithm. Then, the encryption information generation unit 124 stores the generated encryption information in the encryption information storage unit 142 (Step S11).

When the cryptographic information generation unit 124 stores the cryptographic information in the cryptographic information storage unit 142, the optical transceiver device 100 returns to the normal operation mode. That is, the communication control unit 130 changes the communication unit from the second communication unit 132 that performs communication using the second communication method to the first communication unit 131 that performs communication using the first communication method (step S12). ). As described above, the optical transceiver device 100 stores the encryption information in the encryption information storage unit 142, and then starts processing of a main loop that relays an optical signal as an optical transceiver.
In this way, even if other devices are connected to the I2C bus to which the optical transceiver device 100 and the management device 200 are connected, the encryption key information transmitted in step S10 includes the clock I can only see the signal.

Next, an operation example in which the management device 200 controls the conversion processing of the optical transceiver device 100 will be described with reference to FIG.
First, the management device 200 designates the address of the encryption information storage unit 142 of the optical transceiver device 100 and transmits a unique information request for reading the encryption information stored in the encryption information storage unit 142 to the optical transceiver device 100. (Step S20). The optical transceiver device 100 reads the encryption information stored in the encryption information storage unit 142 and transmits it to the management device 200 (step S21).

  When the management apparatus 200 receives the encryption information transmitted from the optical transceiver apparatus 100 in step S21, the management apparatus 200 performs a decryption process based on the decryption algorithm stored in advance in the storage area of the management apparatus 200 (step S22). In other words, the management device 200 compares the decrypted encryption information with a list of unique information of the legitimate optical transceiver device 100 stored in advance in the storage area of the management device 200, and the optical transceiver device 100 determines that the legitimate optical transceiver. It is determined whether or not the device 100 (step S23). Here, if the decrypted encryption information matches the pre-stored unique information of the optical transceiver device 100, the management device 200 determines that it is a legitimate optical transceiver device 100. It is determined that the device is not 100.

  When the determination result in step S23 indicates that the optical transceiver device 100 is not a valid optical transceiver device 100, the management device 200 transmits a signal to be transmitted to the first communication terminal 111 of the management device 200. It is set to H (step S25), and since it is not a certified product, it is not operated. On the other hand, when the determination result in step S <b> 23 is a result indicating that the optical transceiver device 100 is a valid optical transceiver device 100, the management device 200 transmits the result to the first communication terminal 111 of the management device 200. The signal is set to L (step S24). If the control signal received from the first communication terminal 111 is L, the issuance control unit 121 of the optical transceiver device 100 performs conversion processing between an electric signal and an optical signal and emits light. Then, the optical transceiver device 100 starts processing of a main loop that relays an optical signal as an optical transceiver.

  Further, when the optical transceiver device 100 is hot-plugged, the encryption key information is received according to the timing chart as shown in FIG. Here, using the output of MODDEF (0) indicating that the module has been inserted as a trigger, the management apparatus 200 sets the first communication terminal 111 in the predetermined period (100 ms to 200 ms) after the module has been inserted. An encryption key setting signal is transmitted via The method of transmitting the encryption key information from the management device 200 to the optical transceiver device 100 is the same as described above. In this case, however, the I2C signal to another port must be stopped before transmitting the encryption key information.

  As described above, according to the present invention, the optical transceiver device 100 can receive the encryption key information by effectively using the initialization time of 300 ms determined by the MSA. Then, the optical transceiver device 100 generates encryption information based on the received encryption key information and pre-stored unique information, and determines the validity of the generated encryption information, so that the management device 200 can determine the validity of the generated encryption information. Since the conversion control signal indicating whether or not 100 is operating is transmitted, the use can be prevented when the connected optical transceiver apparatus 100 is a copy product and does not perform the encryption processing as described above. The reliability of the entire optical transceiver system can be guaranteed.

  Therefore, the present invention utilizes the fact that the optical transceiver has a plurality of I / Os (electrical interfaces), so that when the optical transceiver is powered on, the master sends a special signal (for example, a book) to the input pin of the optical transceiver. The encryption key setting signal in the embodiment is input to shift to the encryption key setting mode. After shifting to the encryption key setting mode, the optical transceiver receives the encryption key information from the master by a communication method different from I2C (for example, communication by UART). When the optical transceiver cancels the encryption key setting mode, the communication method is returned to I2C. In this way, when viewed from an optical transceiver that does not have the above-mentioned function or other devices having an I2C interface, it can be seen as just a clock signal.

  The embodiment of the present invention has been described above. Each unit of the optical transceiver apparatus according to the present embodiment may be realized by dedicated hardware (for example, wired logic) or configured by a memory and a CPU (central processing unit) to realize the functions of the respective units. This function may be realized by loading the program from the memory and executing it. In addition, a program for realizing the function of the processing unit in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute communication of control signals. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

It is a figure which shows the structure of the optical transceiver system by one Embodiment of this invention. It is a figure which shows the transfer timing of the signal in I2C communication. It is a block diagram which shows the function of a general optical transceiver apparatus. It is a figure which shows pad arrangement | positioning of the optical transceiver apparatus by one Embodiment of this invention. It is a block diagram which shows the function structure of the optical transceiver apparatus by one Embodiment of this invention. It is a figure which shows the signal received by UART. 6 is a timing chart illustrating signals transmitted from the management apparatus by the optical transceiver apparatus according to the embodiment of the present invention. 6 is a flowchart illustrating an operation example in which an optical transceiver device according to an exemplary embodiment of the present invention receives an encryption key. It is a flowchart which shows the determination process of the optical transceiver apparatus by one Embodiment of this invention. It is a timing chart which shows a signal when the optical transceiver apparatus by one Embodiment of this invention is hot-plugged.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Optical transceiver apparatus 111 1st communication terminal 112 2nd communication terminal 113 3rd communication terminal 114 4th communication terminal 121 Issue control part 122 Encryption key setting signal receiving part 123 Encryption key receiving part 124 Encryption information generation part 130 Communication control unit 131 First communication unit 132 Second communication unit 140 Storage unit 141 Unique information storage unit 142 Encryption information storage unit 200 Management device 300 Bus expansion device 401 SCL line 402 SDA line 900 Control unit

Claims (4)

Storing specific information of the self apparatus, it has rows conversion between optical and electrical signals, a first communication means for performing communication by the first communication scheme, a second performing communication by the second communication method A control signal communication method for determining whether or not the unique information stored in the optical transceiver device is predetermined unique information, a management device connected to the optical transceiver device comprising communication means,
Of the optical transceiver device,
An encryption key setting signal receiving unit receiving an encryption key setting signal according to the first communication method from the management device via the first communication unit;
When the encryption key setting signal receiving means receives the encryption key setting signal, the communication control means switches the communication means of its own device from the first communication means to the second communication means;
An encryption key receiving means receiving encryption key information from the management device via the second communication means ;
A step of generating cryptographic information by a predetermined encryption algorithm based on the cryptographic key information received by the cryptographic key receiving unit and the unique information stored in the device;
When the encryption information generation means generates the encryption information, the communication control means switches the communication means of its own device from the second communication means to the first communication means;
When the cipher information output means receives a unique information request from the management device via the first communication means , the cipher information output means outputs the cipher information generated by the cipher information generation means;
The management device is
The encryption information output by the encryption information output means is decrypted by a decryption algorithm corresponding to the encryption algorithm, and whether or not the decrypted information matches the predetermined unique information of the optical transceiver device. A determining step;
A control signal communication method comprising: The management device
After power is turned on the optical transceiver device, within a predetermined time, control signal communication method according to claim 1, said encryption key setting signal, and transmits to the optical transceiver device. An optical transceiver device that stores unique information of the device itself and performs conversion processing between an optical signal and an electrical signal, and the unique information that is connected to the optical transceiver device and stored in the optical transceiver device is determined in advance. An optical transceiver system including a management device that determines whether or not the information is information,
The optical transceiver device includes:
First communication means for performing communication by the first communication method;
A second communication means for performing communication by the second communication method;
An encryption key setting signal receiving means for receiving an encryption key setting signal according to the first communication method from the management device via the first communication means;
Communication control means for switching the communication means of the device from the first communication means to the second communication means when the encryption key setting signal receiving means receives the encryption key setting signal;
Encryption key receiving means for receiving encryption key information from the management device via the second communication means ;
Encryption information generating means for generating encryption information by a predetermined encryption algorithm based on the encryption key information received by the encryption key receiving means and the unique information stored in the device ;
The communication control means switches the communication means of its own device from the second communication means to the first communication means when the encryption information generation means generates the encryption information,
The optical transceiver device includes:
From the management apparatus receives the unique information request via the first communication means includes encryption information output means to output the encryption information generated by the encryption information generating means,
The management device
The encryption information output by the encryption information output means is decrypted by a decryption algorithm corresponding to the encryption algorithm, and whether or not the decrypted information matches the predetermined unique information of the optical transceiver device. An optical transceiver system comprising: determining. In response to a request for unique information received from a management device, the optical transceiver device outputs unique information stored in advance in the device itself to the management device,
First communication means for performing communication by the first communication method;
A second communication means for performing communication by the second communication method;
An encryption key setting signal receiving means for receiving an encryption key setting signal according to the first communication method from the management device via the first communication means;
Communication control means for switching the communication means of the device from the first communication means to the second communication means when the encryption key setting signal receiving means receives the encryption key setting signal;
Encryption key receiving means for receiving encryption key information from the management device via the second communication means ;
Encryption information generating means for generating encryption information by a predetermined encryption algorithm based on the encryption key information received by the encryption key receiving means and the unique information stored in the device ;
The communication control means switches the communication means of its own device from the second communication means to the first communication means when the encryption information generation means generates the encryption information,
The optical transceiver device includes:
From the management apparatus receives the unique information request via the first communication means, an optical transceiver, characterized in that it comprises a cryptographic information output means to output the encryption information generated by the encryption information generating unit apparatus.

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