JP5881145B2 - Transceiver equipped with sub-line, communication system, and communication method - Google Patents

Description

  The present invention relates to avoiding communication disconnection in a transceiver such as an SFP (Small Form-factor Pluggable) transceiver.

  There is a technique for implementing communication by mounting a transceiver in a network device and wire-connecting the transceivers with a fiber cable or the like. For example, in recent years, an increasing number of network devices are equipped with an SFP port. Then, the SFP transceiver is connected to the opposite SFP transceiver by wiring of a fiber cable.

  An example of a technique using such an SFP transceiver is described in Patent Document 1.

JP 2004-222298 A

  By utilizing the technology described in Patent Document 1, it becomes possible to perform wired communication between SFP transceivers. However, in a general technique such as the technique described in Patent Document 1, problems as described later occur.

  The SFP transceiver is connected to the opposite SFP transceiver by fiber cable wiring. However, there is a risk that the connection between the SFP transceivers may be disconnected unintentionally due to the disconnection of the cable due to a physical failure or the disconnection of the cable due to a human error.

  In order to avoid such a communication disconnection due to a cable failure, it is conceivable to provide a physical port different from the main line as a sub line.

  However, the provision of sub-lines increases the number of physical ports to be used. In addition, although the physical line can be changed by changing the SFP transceiver, the mainstream SFP transceiver uses a fiber cable that is vulnerable to shocks, and therefore wiring management must be particularly taken care of. Furthermore, when providing a sub-line for a fiber cable, wiring management is also required for the sub-line.

  This point will be described based on a specific example with reference to FIG. In FIG. 1, network devices SWA11 and SWB12 are directly connected by a main line. SWA11 and SWB12 are also connected by a secondary line via SWC13.

  1. First, it is assumed that cable disconnection occurs in the main line.

  2. In this case, the SWA 11 performs line switching due to a physical failure of the optical fiber cable, and continues communication with the SWB 12 through the sub line.

  3. Further, it is assumed that cable disconnection also occurs in the sub line.

  4). In this case, there is no route to the SWB 12, and communication cannot be continued. In order to prevent this situation, it is necessary to further increase the number of sub-lines.

  In other words, in general line failure countermeasures, physical ports other than the main line are provided exclusively for the sub line, but there is a problem that the number of usable ports in the apparatus is reduced by the amount of the sub line. In addition, the provision of the sub-line dedicated port causes a problem that operation management such as cable wiring and setting is required for the sub-line as well as the main line.

  Accordingly, the present invention provides a transceiver, a communication system, and a communication method equipped with a sub-line that do not occupy a physical port other than the main line and can provide a sub-line without considering cable wiring or the like. The purpose is to provide.

According to a first aspect of the present invention, there is provided a transceiver that communicates with another transceiver connected to a first network device and connected to a second network device other than the first network device. A wired communication means for communicating with the other transceiver by wired connection; a wireless communication means for communicating with the other transceiver by wireless connection; and communication by the wired communication means to the first network device. When the occurrence of a failure on the wired connection path is detected, the communication is switched to the communication by the wireless communication means and the fact that the failure on the wired connection path is detected is transmitted to the other transceiver. When the first failure detection unit and the first network device are performing communication by the wired communication unit, the other transceiver has a presence. A second failure detection means for switching to communication by the wireless communication means when receiving a notification that a failure on the connection path has been detected, and when the first network device is making communication by the wireless communication means In addition, failure detection control means for switching to communication by the wired communication means when the occurrence of a failure on the wired connection path is no longer detected or when it is no longer detected that a failure from the other transceiver is detected, the provided Rutotomoni, wherein with the transceiver other transceiver has a radio set to be common, the wireless communication provided a transceiver, characterized that you reject from devices having different wireless settings other than the both transceivers Is done.

  According to a second aspect of the present invention, a first transceiver connected to a first network device; a second transceiver connected to a second network device other than the first network device; A communication system for communicating between the first transceiver and the second transceiver, wherein the first transceiver and the second transceiver are transceivers provided according to the first aspect of the present invention. A featured communication system is provided.

According to the third aspect of the present invention, communication performed by a transceiver connected to a first network device and communicating with another transceiver connected to a second network device other than the first network device. A method comprising: a wired communication step for performing communication with the other transceiver by wired connection; a wireless communication step for performing communication by wireless connection with the other transceiver; and the wired communication step for communicating with the first network device. When the occurrence of a failure on the wired connection path is detected while performing communication by the communication, the communication is switched to the communication by the wireless communication step and a failure on the wired connection path is detected for the other transceiver. A first failure detection step for sending a message, and causing the first network device to perform communication according to the wired communication step. A second failure detection step of switching to communication by the wireless communication step when receiving a notification that a failure on the wired connection path has been detected from the other transceiver, and the wireless communication to the first network device The wire communication step when the occurrence of a failure on the wired connection path is no longer detected or the failure to detect a failure from the other transceiver is no longer detected during communication in the communication step and a fault detection control step of switching the communication by Rutotomoni, wherein with the transceiver other transceiver has a radio set to be common, a wireless communication from devices having different wireless settings other than the both transceiver rejects communication method, wherein to Rukoto is provided.

  According to the present invention, a wired main line and a wireless sub line are provided in a single SFP transceiver, and when a failure occurs on the main line, the main line is switched to the sub line in the SFP transceiver. It is possible to provide a sub-line without occupying a physical port and without considering cable wiring or the like.

It is a figure showing the specific example of mounting of an SFP transceiver. It is a block diagram showing the basic composition of the embodiment of the present invention. It is a figure showing the example of mounting of embodiment of this invention. It is a figure (1/2) showing about the communication of embodiment of this invention. It is a figure (2/2) showing communication of the embodiment of the present invention. It is a flowchart (1/3) showing the basic operation | movement of embodiment of this invention. It is a flowchart (2/3) showing the basic operation | movement of embodiment of this invention. It is a flowchart (3/3) showing the basic operation | movement of embodiment of this invention. It is a figure showing the table regarding the line switching of embodiment of this invention. It is a figure showing the example of mounting of the modification 1 of embodiment of this invention. It is a block diagram showing the fundamental structure of the modification 1 of embodiment of this invention. It is a flowchart (1/2) showing the basic operation | movement of the modification 1 of embodiment of this invention. It is a flowchart (2/2) showing the basic operation | movement of the modification 1 of embodiment of this invention. It is a block diagram showing the fundamental structure of the modification 2 of embodiment of this invention. It is a figure showing the example of mounting of the modification 2 of embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 shows an outline of the SFP transceiver 100 according to the embodiment of the present invention. The SFP transceiver 100 is a transceiver obtained by adding a wireless LAN function for a secondary line to a 2-core SFP optical transceiver.

  Specifically, the SFP transceiver 100 includes an optical line unit 110, a wireless local area network (LAN) line unit 120, a line switching S / W 130, a failure detection unit 140, an EEPROM (Electrically Erasable Programmable Read-Only Memory) 150, and an SFP. A connector 160 is included.

  The SFP transceiver 100 is inserted into the SFP port 310 of the main device 300 and processes data transmitted and received by the main device 300. The destination of data transmission / reception of the SFP transceiver 100 is the opposite SFP transceiver 200. Since the opposite SFP transceiver 200 has the same configuration as that of the SFP transceiver 100, the description of the configuration is omitted, and part of the illustration is also omitted. Further, it is assumed that the opposite SFP transceiver 200 is also connected to a main device (not shown) other than the main device 300 in the same manner as the SFP transceiver 100.

  In this description, it is assumed that the specifications of the SFP transceiver 100 and the counter SFP transceiver 200, such as the shape and electrical signals, conform to the SFP MSA (Small Form-factor Pluggable Transceiver MultiSource Agreement). The main device 300 may be any device specifically. Also, the number of SFP ports 310 may be an arbitrary number.

  The SFP transceiver 100 uses an optical line unit 110 as a main line. Here, the optical line unit 110 includes an optical output unit 111, an optical input unit 112, a digital / optical signal conversion unit 113, an optical / digital signal conversion unit 114, an optical line baseband IC 115, and a LOS detection unit 116.

  The optical line unit 110 receives the digital signal data output from the main device 300 via the SFP connector 160 and the line switching S / W 130. Then, the optical line unit 110 converts the received digital signal data into optical signal data by the digital / optical signal conversion unit 113 and transmits it to the opposite SFP transceiver 200 via the optical output unit 111.

  Further, the optical line unit 110 receives the optical signal data output from the opposite SFP transceiver 200 by the optical input unit 112. The optical line unit 110 converts the received optical signal data into digital signal data by the optical / digital signal conversion unit 114, and outputs the digital signal data to the main unit 300 via the line switching S / W 130 and the SFP connector 160. The LOS detection unit 116 of the optical line unit 110 monitors the reception status of the optical signal. Then, it detects from the reception state that a physical failure has occurred on the optical line. When a failure occurrence is detected, a LOS signal is transmitted to the failure detection control unit 143.

  The SFP transceiver 100 uses the wireless LAN line unit 120 as a sub line. Here, the wireless LAN line unit 120 includes an antenna 121, an S / W 122, a transmitter 123, a frequency control unit 124, a receiver 125, a digital / wireless signal conversion unit 126, a wireless / digital signal conversion unit 127, and a wireless baseband IC 128. .

  The wireless LAN line unit 120 receives the digital signal data output from the main device 300 via the SFP connector 160 and the line switching S / W 130. Then, the wireless LAN line unit 120 converts the received digital signal data into wireless signal data by the digital / wireless signal conversion unit 126, converts the digital signal data to an optimum frequency by the frequency control unit 124 and the transmitter 123, and transmits the opposite SFP from the antenna 121. Transmit to transceiver 200.

  The wireless LAN line unit 120 converts the radio signal data of the opposite SFP transceiver 200 received by the antenna 121 to the frequency control unit 124 and the receiver 125. Further, the wireless LAN line unit 120 converts the converted data into digital signal data by the wireless / digital signal conversion unit 127, and outputs the digital signal data to the main unit 300 via the line switching S / W 130 and the SFP connector 160.

  The wireless LAN function used between the SFP transceiver 100 and the opposite SFP transceiver 200 is the ad hoc mode communication of the IEEE 802.11 standard. Therefore, it is not necessary to use a relay device such as a wireless LAN access point.

  Note that this configuration is merely a specific example, and other wireless communication is possible as long as direct signal transmission / reception can be realized between the SFP transceiver 100 and the opposite SFP transceiver 200 without using a relay device such as a wireless LAN access point. You may make it conform to LAN standard. In the present embodiment, communication is not limited to ad-hoc mode communication with wireless LAN connection, and communication may be realized based on standards such as Bluetooth (registered trademark) and infrared communication.

  The wireless setting 151 necessary for wireless LAN connection between the SFP transceiver 100 and the opposite SFP transceiver 200 is stored in the EEPROM 150 at the manufacturing stage of the SFP transceiver. In this description, since the ad hoc mode communication of the IEEE 802.11 standard is assumed, the wireless setting 151 is a combination of an ESSID (Extended Service Set Identifier) and an encryption key.

  When the SFP transceiver 100 establishes a wireless LAN connection with the opposite SFP transceiver 200, the wireless setting 151 is used. When the wireless setting 151 of the SFP transceiver 100 and the wireless setting 251 of the opposite SFP transceiver 200 are the same, wireless LAN connection is possible. If the wireless settings are different, the wireless LAN between the SFP transceiver 100 and the opposite SFP transceiver 200 cannot be normally connected. The wireless setting 151 of the EEPROM 150 can be viewed and changed on the console of the main device 300. While the wireless LAN line unit 120 is reading the wireless setting 151 of the EEPROM 150, the wireless setting 151 cannot be changed on the console of the main device 300.

  The line switching S / W 130 is a switch for switching between the optical line unit 110 as a main line and the wireless LAN line unit 120 as a sub line. When the line switching S / W 130 receives a line switching signal from the failure detection control unit 143, the line switching S / W 130 switches the line to be used.

  The failure detection unit 140 includes a failure detection pattern sending unit 141, a failure detection pattern detection unit 142, and a failure detection control unit 143.

  The failure detection control unit 143 receives the LOS signal from the LOS detection unit 116 and generates a failure detection pattern signal. Also, the failure detection control unit 143 receives a LOS signal or receives a failure detection pattern signal of the opposite SFP transceiver 200 so that the line switching S / W 130 switches the line switching signal to switch from the optical line to the wireless LAN line. Send.

  If the failure detection control unit 143 does not receive the LOS signal or the failure detection pattern signal of the opposite SFP transceiver 200 after transmitting the line switching signal, the failure detection control unit 143 sends the line switching S / W 130 from the wireless LAN line to the optical line. A line switching signal is transmitted to switch. In order to confirm the stability of the optical line, the LOS signal or the failure detection pattern signal is not received immediately after receiving the LOS signal or the failure detection pattern signal, but the LOS signal or failure detection pattern signal is not received. A line switching signal is transmitted after a certain period of time. The time for confirming the stability is longer than the transmission interval of the LOS signal or the failure detection pattern signal. That is, it is confirmed that at least a plurality of times, the LOS signal or the failure detection pattern signal is not received.

  The failure detection pattern sending unit 141 transmits the failure detection pattern signal generated by the failure detection control unit 143 to the failure detection pattern detection unit 242 of the opposite SFP transceiver 200. On the other hand, the failure detection pattern detection unit 142 receives the failure detection pattern signal generated by the failure detection control unit 243 of the opposite SFP transceiver 200 and notifies the failure detection control unit 143 of the failure detection pattern signal.

  The EEPROM 150 stores a media type 152, a manufacturer name 153, and a wireless setting 151 (ESSID / encryption key) at the manufacturing stage of the SFP transceiver. Information in the EEPROM 150 can be viewed on the console of the main device 300.

  The SFP connector 160 is a connection part with the SFP port 310 of the main body apparatus 300. The SFP transceiver 100 is connected to the SFP port 310 of the main device 300 via the SFP connector 160.

  Next, the present embodiment will be described using specific examples. In this description, an example is shown in which when one of the two optical fiber cables connecting the two SFP transceivers is disconnected, the used line of the SFP transceiver is switched from the optical line to the wireless LAN line.

  Referring to FIG. 3, the specific structure of the SPF transceiver in this example is represented by a four-sided view. Specifically, when the surface having the SPF connector is the front surface 27, the front surface 24, the back surface 25, and the side surface 26 are shown.

  The radio antenna storage unit 24 a is a radio antenna storage unit, and corresponds to the storage unit of the antenna 23. The two-core optical fiber cable connection portion 24b is a connection portion with an optical fiber cable, and is connected to portions corresponding to the light output portion 111 and the light input portion 112. The shape of the SFP connector portion 24c conforms to SFP MSA and corresponds to the SFP 160.

  FIG. 4 is a diagram showing a line switching operation from the main line to the sub line of the SFP transceiver 31 according to the embodiment of the present invention. The network devices SWA28, SWB29, and SWC30 have the SFP transceiver 31 of this embodiment mounted on each connection port. Each FP transceiver 31 is connected by an optical fiber cable 32 which is a two-core optical fiber cable. Further, an optical line is used as the main line, and a wireless LAN line is used as the sub line.

  1. First, it is assumed that cable cutting has occurred in the optical fiber cable 37.

  2. In this case, the SFP transceiver 34 of the SWA 28 detects the LOS signal due to a physical failure on the optical fiber cable 37.

  3. Then, the SFP transceiver 34 switches the used line to a sub-wireless wireless LAN line. In addition, the SFP transceiver 34 transmits a failure detection pattern signal 36 to the opposite SFP transceiver 35. The opposite SFP transceiver 35 that has received the failure detection pattern 36 switches the used line to a wireless LAN line.

  As a result, the SFP transceiver 34 and the opposite SFP transceiver 35 continue communication using the wireless LAN line. The wireless LAN line uses a one-to-one connection ad hoc mode communication 33 that does not require a wireless access point.

  The wireless LAN line connection in this embodiment will be described with reference to FIG.

  It is assumed that the SFP transceiver 40 and the SFP transceiver 41 use the same wireless setting, and the SFP transceiver 42 and the SFP transceiver 43 use the same wireless setting.

  Since the wireless settings of the SFP transceiver 40 and the SFP transceiver 41 are different from the wireless settings of the SFP transceiver 42 and the SFP transceiver 43, they cannot be connected to each other via a wireless LAN. For this reason, there is no inconvenience that a wireless LAN connection is established between SFP transceivers that are not connected by the main line.

  Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS. 6, 7 and 8, and FIG.

  FIG. 6 is a diagram showing a flow of outputting data from the main device 300 via the SFP transceiver 100 to the opposing device on which the SFP transceiver 200 is mounted.

  First, main device 300 inputs data addressed to the opposite device to SFP transceiver 100 (step S401).

  When the line switching S / W selects the optical line as the used line (in step S402, the optical line), the digital signal data is converted into optical signal data and output to the opposite apparatus via the optical line. Specifically, data is modulated by the optical line baseband IC (step S403). The modulated data is converted into an optical signal by the digital / optical signal converter 113 (step S404). Data is output from the light output unit 111 to the opposite device (step S405).

  On the other hand, when the line switching S / W selects the wireless LAN line as the line to be used (in step S402, the wireless LAN line), the digital signal data is converted into wireless signal data and output to the opposite device via the antenna. Specifically, data is modulated by the wireless baseband IC 128 (step S406). The modulated data is converted into a wireless signal by the digital / wireless signal converter 126 (step S407). Data is output from the antenna 121 to the opposite device (step S408).

  FIG. 7 is a diagram illustrating a flow of switching from an optical line to a wireless LAN line.

  First, communication using an optical line is performed (step S501).

  When the failure detection unit 140 detects a LOS signal from the optical line unit 110 (Yes in step S502), the failure detection unit 140 transmits a failure detection pattern signal to the optical line (step S503).

  In addition, the failure detection unit 140 sends a line switching signal to the line switching S / W 130 (step S504). The line switching S / W 130 that has received the line switching signal changes the used line from the optical line to the wireless LAN line (step S505).

  On the other hand, when the failure detection unit does not detect the LOS signal from the optical line (No in step S502) and detects the failure detection pattern signal (Yes in step S506), the failure detection unit 140 causes the line switching S / W 130 to be detected. A line switching signal is sent to the terminal (step S504). The line switching S / W 130 that has received the line switching signal changes the used line from the optical line to the wireless LAN line (step S505).

  On the other hand, when the failure detection unit does not detect the LOS signal and the failure detection pattern signal from the optical line (No in both step S502 and step S506), the line switching operation of the line switching S / W 130 does not occur.

  FIG. 8 is a diagram illustrating a flow of switching from a wireless LAN line to an optical line.

  First, communication using a wireless LAN line is performed (step S601).

  When the failure detection unit 140 detects a LOS signal from the optical line unit 110 (Yes in step S602) or a failure detection pattern signal (Yes in step S603), the line switching operation of the line switching S / W 130 is as follows. Does not occur.

  Even when the optical line is not stable for a certain period of time, the line switching operation of the line switching S / W 130 does not occur (No in step S604).

  When the failure detection unit does not detect the LOS signal and the failure detection pattern signal from the optical line (No in both step S602 and step S603) and the optical line is stable for a certain time (Yes in step S604), the line A line switching signal is sent to the switching S / W 130 (step S607).

  The line switching S / W 130 that has received the line switching signal changes the used line from a wireless LAN line to an optical line (step S608).

  If the failure detection pattern sending unit 141 of the failure detection unit 140, not the failure detection pattern sending unit 241 of the opposite SPF transceiver 200, sends a failure detection pattern signal to the optical line (Yes in step S605), the line The failure detection pattern signal is stopped before sending the line switching signal to the switching S / W 130 (step S606).

  FIG. 9 is a table showing the used lines for switching the line switching S / W 130 according to the reception status of the LOS signal and the failure detection pattern signal as a result of each operation described above.

  Next, a modified example obtained by modifying the above-described embodiment will be described.

[Modification 1]
As a first modification, an example in which a communication function using a wireless LAN line is mounted on a general J-45 connector metal line SFP transceiver will be described with reference to FIGS. 10 to 13.

  FIG. 10 is a diagram illustrating a physical configuration example of the SFP transceivers 48, 49, 50, and 51 according to the present embodiment.

  Referring to FIG. 3, the specific structure of the SPF transceiver in this example is represented by a four-sided view. Specifically, when the surface having the SPF connector is the front surface 27, the front surface 24, the back surface 25, and the side surface 26 are shown.

  FIG. 11 is a diagram illustrating a configuration in which an SFP transceiver 101 having a metal line as a main line and a wireless LAN line as a sub line is connected to the opposite SFP transceiver 201 on a one-to-one basis.

  In this modification, an optical line is not used as in the SFP transceiver 100, but a metal line through which an electrical signal represented by a telephone line or the like passes is used. Therefore, the SFP transceiver 101 has a metal line unit 170 instead of the optical line unit 101. The metal line unit 170 includes an output unit 171, an input unit 172, and a metal line unit IC 173.

  Next, the operation of this modification will be described with reference to the flowcharts of FIGS.

  FIG. 12 is a diagram illustrating a flow of switching from a metal line to a wireless LAN line.

  First, communication using a metal optical line is performed (step S701).

  Next, the failure detection control unit 143 checks the presence / absence of a signal on the metal line sent from the opposite SFP transceiver 201. If there is no signal (No in step S702), a line switching signal is transmitted to the line switching S / W 55 to switch to a wireless LAN line. If there is a signal, a line switching signal is transmitted to the line switching S / W 131 after a predetermined time for confirming the stability of the metal line (step S703). Then, the line switching S / W 131 changes the used line from the metal line to the wireless LAN line (step 704).

  FIG. 13 shows a flow of line switching operation from a wireless LAN line to a metal line. The present invention can also be applied to this embodiment.

  First, communication using a wireless LAN line is performed (step S801).

  When failure detection unit 140 does not detect a digital signal from a metal line (No in step S802), the line switching operation of line switching S / W 130 does not occur.

  Even when the metal line is not stable for a certain time, the line switching operation of the line switching S / W 131 does not occur (No in step S803).

  When the failure detection unit detects a digital signal from the metal line (Yes in step S802), if the metal line is stable for a certain time (Yes in step S803), a line switching signal is sent to the line switching S / W 131. (Step S804).

  The line switching S / W 131 that has received the line switching signal changes the used line from a wireless LAN line to a metal line (step S805).

[Modification 2]
FIG. 14 and FIG. 15 show an example in which a DIP S / W (Dual In-line Package switch) that can arbitrarily change the ESSID included in the wireless setting 151 of the EEPROM 150 in the SFP transceiver is further added as a second modification.

  Referring to the block diagram in FIG. 14, the ESSID included in the wireless setting 151 of the SFP transceiver 102 can be changed by the DIP S / W 154. Similarly, the ESSID included in the wireless setting 251 of the opposite SFP transceiver 202 can be changed by the DIP S / W 254. A wireless LAN connection cannot be normally established unless the ESSIDs of the two SFP transceivers are matched with each other by DIP S / W.

  FIG. 15 is a diagram illustrating a physical configuration example of the SFP transceiver 63 according to the present invention in which the DIP S / W 64 is mounted. In this example, there is an effect that the ESSID can be changed by the DIP S / W of the SFP transceiver without the console of the main body.

  Note that Modification 1 and Modification 2 described above may be combined. In other words, the DIP S / W may be further provided with the sub line as a metal line.

  Moreover, although the above-described embodiment is a preferred embodiment of the present invention, the scope of the present invention is not limited only to the above-described embodiment, and various modifications are made without departing from the gist of the present invention. Implementation in the form is possible.

  For example, the shape of the transceiver in the embodiment of the present invention is not limited to the SFP transceiver, but can be applied to a transceiver of another standard used in a network device such as a GBIC transceiver, an XFP transceiver, or a CFP transceiver.

  Further, the wireless connection in the embodiment of the present invention is not limited to the ad hoc mode communication of the wireless LAN connection, but can be applied to a wireless technology such as Bluetooth (registered trademark) and infrared rays.

  The transceiver described above can be realized by hardware, software, or a combination thereof. Further, the communication method performed by the transceiver can also be realized by hardware, software, or a combination thereof. Here, “realized by software” means realized by a computer reading and executing a program.

  The program may be stored using various types of non-transitory computer readable media and supplied to the computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD- R, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)). The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  The embodiment of the present invention described above has many effects as described below.

  The first effect is that the port of the apparatus can be effectively used.

  The reason is that by having the main line and the sub line in one SFP transceiver, the ports used as the sub line can be reduced and the port can be used for other purposes. That is, it is possible to provide a sub line without adding a port.

  The second effect is that it is not necessary to manage the wiring of the sub-line by making the sub-line in the SFP transceiver a wireless LAN.

  The third effect is that, by using the wireless LAN ad hoc mode communication for the sub line, a one-to-one connection can be realized even when the sub line is switched to, as in the case of the wired connection.

  The fourth effect is that since the setting for wireless connection with the opposite SFP transceiver is stored in the SFP transceiver, there is no need to be aware of the setting of the sub line.

  The fifth effect is that the main line and the sub line can be switched seamlessly when a line failure occurs. This is because failure / restoration is detected by the LOS signal and failure detection pattern signal on the wired line, and the line is switched.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Supplementary Note 1) A transceiver that is connected to a first network device and communicates with another transceiver connected to a second network device other than the first network device,
Wired communication means for communicating with the other transceiver by wired connection;
Wireless communication means for communicating with the other transceiver by wireless connection;
When the first network device is performing communication by the wired communication means, if it detects a failure on the wired connection path, it switches to communication by the wireless communication means and First failure detection means for sending a notification that a failure has been detected on the wired connection path;
When the first network device is performing communication by the wired communication means, switching to communication by the wireless communication means is received from the other transceiver that a failure on the wired connection path is detected. A second fault detection means;
When the first network device is communicating by the wireless communication means, it is detected that a failure has not been detected on the wired connection path or that a failure from the other transceiver has been detected. Failure detection control means for switching to communication by the wired communication means when no longer occurs,
A transceiver comprising:

(Appendix 2) The transceiver according to appendix 1,
The wired communication is a communication method for transmitting and receiving optical signals over an optical line,
Optical input means for receiving the optical signal;
Signal converting means for converting the received optical signal into a digital signal;
LOS detection means for detecting a failure on the wired connection path by monitoring the converted signal;
A transceiver, further comprising:

(Supplementary note 3) The transceiver according to supplementary note 1, wherein
The wired communication is a communication method for transmitting and receiving electrical signals on a metal line,
Input means for receiving the electrical signal;
Metal line means for checking the presence or absence of the electrical signal and detecting that a failure has occurred on the wired connection path when the electrical signal is not present;
A transceiver, further comprising:

(Appendix 4) The transceiver according to any one of appendices 1 to 3,
Transmission that the failure is detected by the first failure detection means is periodically performed at a predetermined transmission interval,
The failure detection control means detects that a failure from the other transceiver has been detected for a time longer than the predetermined transmission interval when the first network device is communicating by the wireless communication means. A transceiver characterized by switching to communication by the wired communication means when it is no longer available.

(Supplementary note 5) The transceiver according to any one of supplementary notes 1 to 4,
Communication with said other transceiver by the said wireless communication means is direct communication performed between the said transceiver and said other transceiver, without going through a relay apparatus, The transceiver characterized by the above-mentioned.

(Appendix 6) The transceiver according to any one of appendices 1 to 5,
A transceiver characterized in that the transceiver and the other transceiver have a common wireless setting, and wireless communication from devices other than both transceivers is rejected.

(Supplementary note 7) The transceiver according to supplementary note 6, wherein
The transceiver stores a plurality of the wireless settings, and further includes a switch for selecting a wireless setting actually used in wireless communication from the plurality of wireless settings.

(Supplementary note 8) A first transceiver connected to a first network device and a second transceiver connected to a second network device other than the first network device, wherein the first transceiver In a communication system for communicating between a transceiver and a second transceiver,
8. A communication system, wherein both or one of the first transceiver and the second transceiver is the transceiver according to any one of appendices 1 to 7.

(Supplementary note 9) A communication method performed by a transceiver connected to a first network device and communicating with another transceiver connected to a second network device other than the first network device,
A wired communication step of communicating with the other transceiver by wired connection;
A wireless communication step for communicating with the other transceiver by wireless connection;
When the first network device is performing communication in the wired communication step, if it detects a failure on the wired connection path, it switches to communication in the wireless communication step and A first failure detection step for sending a notification that a failure has been detected on the wired connection path;
When the first network device performs communication in the wired communication step, when it is detected that a failure on the wired connection path is detected from the other transceiver, the communication is switched to the communication in the wireless communication step. A second fault detection step;
When the first network device is communicating in the wireless communication step, it is detected that a failure has not been detected on the wired connection path or that a failure has been detected from another transceiver. A failure detection control step of switching to communication by the wired communication step when no longer occurs;
A communication method comprising:

100, 101, 102 SFP transceiver 110 Optical line unit 111, 211 Optical output unit 112, 212 Optical input unit 113 Digital / optical signal converter 114 Optical / digital signal converter 115 Optical line baseband IC
116 LOS detector 116
120 Wireless LAN line unit 121, 221 Antenna 122 S / W
123 Transmitter 124 Frequency Control Unit 125 Receiver 126 Digital / Radio Signal Converter 127 Radio / Digital Signal Converter 128 Radio Baseband IC
130, 131 Line switching S / W
140 Failure detection unit 141, 241 Failure detection pattern sending unit 142, 242 Failure detection pattern detection unit 143, 243 Failure detection control unit 150 EEPROM
151,251 Wireless setting 152 Media type 153 Manufacturer name 154,254 DIP S / W
160 SFP connector 170 Metal line unit 171, 271 Output unit 172, 272 Input unit 173 Metal line IC
200, 201, 202 Opposite SFP transceiver 300 Main unit 310 SFP port

Claims (8)

A transceiver connected to a first network device for communicating with other transceivers connected to a second network device other than the first network device;
Wired communication means for communicating with the other transceiver by wired connection;
Wireless communication means for communicating with the other transceiver by wireless connection;
When the first network device is performing communication by the wired communication means, if it detects a failure on the wired connection path, it switches to communication by the wireless communication means and First failure detection means for sending a notification that a failure has been detected on the wired connection path;
When the first network device is performing communication by the wired communication means, switching to communication by the wireless communication means is received from the other transceiver that a failure on the wired connection path is detected. A second fault detection means;
When the first network device is communicating by the wireless communication means, it is detected that a failure has not been detected on the wired connection path or that a failure from the other transceiver has been detected. Failure detection control means for switching to communication by the wired communication means when no longer occurs,
The equipped Rutotomoni,
Transceiver wherein with the transceiver other transceiver has a radio set to be common, a wireless communication from devices having different wireless settings other than the both transceiver characterized that you reject. The transceiver of claim 1, comprising:
The wired communication is a communication method for transmitting and receiving optical signals over an optical line,
Optical input means for receiving the optical signal;
Signal converting means for converting the received optical signal into a digital signal;
LOS detection means for detecting a failure on the wired connection path by monitoring the converted signal;
A transceiver, further comprising: The transceiver of claim 1, comprising:
The wired communication is a communication method for transmitting and receiving electrical signals on a metal line,
Input means for receiving the electrical signal;
Metal line means for checking the presence or absence of the electrical signal and detecting that a failure has occurred on the wired connection path when the electrical signal is not present;
A transceiver, further comprising: The transceiver according to any one of claims 1 to 3,
Transmission that the failure is detected by the first failure detection means is periodically performed at a predetermined transmission interval,
The failure detection control means detects that a failure from the other transceiver has been detected for a time longer than the predetermined transmission interval when the first network device is communicating by the wireless communication means. A transceiver characterized by switching to communication by the wired communication means when it is no longer available. A transceiver according to any one of claims 1-4,
Communication with said other transceiver by the said wireless communication means is direct communication performed between the said transceiver and said other transceiver, without going through a relay apparatus, The transceiver characterized by the above-mentioned. The transceiver according to any one of claims 1 to 6,
The transceiver stores a plurality of the wireless settings, and further includes a switch for selecting a wireless setting actually used in wireless communication from the plurality of wireless settings. A first transceiver connected to the first network device; and a second transceiver connected to a second network device other than the first network device, wherein the first transceiver and the second transceiver In a communication system that performs communication between transceivers of
A communication system, wherein both or one of the first transceiver and the second transceiver is the transceiver according to any one of claims 1 to 6 . A communication method performed by a transceiver connected to a first network device and communicating with another transceiver connected to a second network device other than the first network device,
A wired communication step of communicating with the other transceiver by wired connection;
A wireless communication step for communicating with the other transceiver by wireless connection;
When the first network device is performing communication in the wired communication step, if it detects a failure on the wired connection path, it switches to communication in the wireless communication step and A first failure detection step for sending a notification that a failure has been detected on the wired connection path;
When the first network device performs communication in the wired communication step, when it is detected that a failure on the wired connection path is detected from the other transceiver, the communication is switched to the communication in the wireless communication step. A second fault detection step;
When the first network device is communicating in the wireless communication step, it is detected that a failure has not been detected on the wired connection path or that a failure has been detected from another transceiver. A failure detection control step of switching to communication by the wired communication step when no longer occurs;
The equipped Rutotomoni,
Communication method wherein with the transceiver other transceiver has a radio set to be common, a wireless communication from devices having different wireless settings other than the both transceiver characterized that you reject.

Images