WO2014101021A1 - Pcie信号的传输方法和设备 - Google Patents

Pcie信号的传输方法和设备 Download PDF

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Publication number
WO2014101021A1
WO2014101021A1 PCT/CN2012/087577 CN2012087577W WO2014101021A1 WO 2014101021 A1 WO2014101021 A1 WO 2014101021A1 CN 2012087577 W CN2012087577 W CN 2012087577W WO 2014101021 A1 WO2014101021 A1 WO 2014101021A1
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WO
WIPO (PCT)
Prior art keywords
pcie
signal
controller
photoelectric converter
peer device
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Application number
PCT/CN2012/087577
Other languages
English (en)
French (fr)
Inventor
陈明
付晓飞
李永耀
邹雨
张道勇
胡上贺
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN2012800034505A priority Critical patent/CN103392305A/zh
Priority to PCT/CN2012/087577 priority patent/WO2014101021A1/zh
Publication of WO2014101021A1 publication Critical patent/WO2014101021A1/zh

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14Handling requests for interconnection or transfer
    • G06F13/20Handling requests for interconnection or transfer for access to input/output bus
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38Information transfer, e.g. on bus
    • G06F13/382Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]

Definitions

  • the present invention relates to the field of communications, and in particular, to a PCIE (Peripheral Component Interconnect Express) signal transmission method and device.
  • PCIE Peripheral Component Interconnect Express
  • the PCIE bus has weak anti-attenuation capability and short transmission distance, it is generally only suitable for communication links inside the device.
  • the PCIE signal inside the device must be converted into other protocol signals (such as Gigabit Ethernet signals, etc.) through the protocol conversion chip, and then transmitted to implement the device and other devices. Communication between external devices.
  • the invention provides a method and a device for transmitting a PCIE signal, which not only can improve transmission efficiency, save design cost, but also be suitable for long-distance transmission.
  • the first aspect provides a method for transmitting a PCIE signal, where the method includes: generating a PCIE electrical signal that needs to be sent to a peer device, where the peer device is a device other than the PCIE electrical signal; The generated PCIE electrical signal is converted into a PCIE optical signal;
  • the method further includes: determining whether the generated PCIE electrical signal has distortion; if it is determined that the generated PCIE electrical signal is distorted, recovering the distorted PCIE electrical signal to a distortion-free PCIE electrical signal;
  • Converting the generated PCIE electrical signal to a PCIE optical signal includes:
  • the method further includes: receiving a PCIE optical signal sent by the peer device;
  • the method further includes : performing anti-attenuation processing on the converted PCIE electrical signal to increase the anti-attenuation capability of the PCIE electrical signal.
  • the method before the sending the PCIE optical signal to the peer device, the method further includes: :
  • the establishing an optical transmission link connection with the peer device includes:
  • the method further includes:
  • the sending, by the established optical transmission link connection, the PCIE optical signal to the peer device includes:
  • the PCIE optical signal is transmitted to the opposite device through the established optical transmission link connection.
  • a second aspect provides a transmission device for a PCIE signal, where the device includes: a controller, configured to generate a PCIE electrical signal that needs to be sent to a remote device, where the opposite device generates the PCIE electrical signal. And a photoelectric converter, configured to convert the PCIE electrical signal generated by the controller into a PCIE optical signal; and send the PCIE optical signal to the peer device.
  • the device further includes: an equalizer, after the controller generates a PCIE electrical signal that needs to be sent to the peer device, and in the photoelectric converter Determining whether there is distortion of the PCIE electrical signal generated by the controller before converting the PCIE electrical signal generated by the controller into a PCIE optical signal; if it is determined that the generated PCIE electrical signal is distorted, the distorted PCIE is electrically The signal is restored to a distortion-free PCIE electrical signal; the photoelectric converter is specifically used to: The equalizer is restored to a distortion-free PCIE electrical signal converted to a PCIE optical signal.
  • the photoelectric converter is further configured to: receive a PCIE optical signal sent by the opposite device; convert the received PCIE optical signal into a PCIE electrical signal.
  • the device further includes:
  • a driver after the photoelectric converter converts the received PCIE optical signal into a PCIE electrical signal, performing anti-attenuation processing on the PCIE electrical signal converted by the photoelectric converter to enable the PCIE electrical signal
  • the anti-attenuation ability increases.
  • the controller is further configured to: send, by the photoelectric converter, the Before the PCIE optical signal, the optical transmission link is established with the peer device; the photoelectric converter is specifically configured to: send the PCIE optical signal to the opposite device by using the established optical transmission link connection.
  • the controller is specifically configured to:
  • the handshake signaling is repeatedly sent to the peer device until an optical transport link connection is established with the peer device.
  • the controller after the controller establishes an optical transmission link connection with the peer device, the controller is further configured to:
  • the photoelectric converter is specifically configured to: if the controller detects the location The optical transmission link is connected normally, and the PCIE optical signal is sent to the opposite device through an optical transmission link connection established by the controller.
  • the controller is further configured to: determine whether the photoelectric conversion is performed before the photoelectric converter converts the PCIE electrical signal generated by the controller into a PCIE optical signal The device is connected; if it is determined that a photoelectric converter is connected, the photoelectric converter is enabled.
  • the controller and the photoelectric converter are connected by a control signal line, where the control signal line is used to The controller transmits configuration information of the photoelectric converter;
  • the controller is further configured to receive configuration information of the photoelectric converter that is transmitted by the control signal line, and send configuration information of the photoelectric converter to an admission verifier;
  • the device further includes:
  • An access checker configured to determine, according to configuration information of the photoelectric converter sent by the controller, whether to allow the photoelectric converter to access the controller, and whether to allow the photoelectric converter to be accessed Notifying the controller of the verification result to the controller;
  • the controller is specifically configured to: if it is determined that the photoelectric converter is accessed, and the verification result of the admission checker is to allow the photoelectric converter to be accessed, the photoelectric converter is enabled.
  • the control signal line is used to transmit, to the controller, a positional indicator for determining whether the photoelectric converter is connected Detecting a signal; the controller is specifically configured to: receive an in-position detection signal transmitted by the control signal line; determine whether a level of the in-position detection signal is inverted; If an inversion occurs, it is determined that there is a photoelectric converter access;
  • a PCIE port is disposed on the controller and the photoelectric converter, and the controller and the photoelectric converter are connected to respective PCIE ports by using a control signal line.
  • the control signal line is configured to transmit, to the controller, an in-position detection signal for determining whether the photoelectric converter is connected, if the optical transmission link is abnormally connected;
  • the controller is specifically configured to: receive an in-position detection signal transmitted by the control signal line; determine whether a level of the in-position detection signal is inverted;
  • the PCIE port corresponding to the abnormal optical transmission link connection is closed; if no inversion occurs, the PCIE port corresponding to the abnormal optical transmission link connection is restarted, and the restart is performed through the restart.
  • the PCIE port sends handshake signaling to re-establish an optical transport link connection with the peer device.
  • the method and device for transmitting a PCIE signal provided by the present invention can not only improve the transmission efficiency by converting a PCIE electrical signal into a PCIE optical signal, but also transmitting the PCIE optical signal between different devices. It saves design costs and is also suitable for long distance transmission.
  • FIG. 1 is a flowchart of a method for transmitting a PCIE signal according to an embodiment of the present invention
  • FIG. 2A is a structural block diagram of a PCIE signal transmission device according to an embodiment of the present invention
  • FIG. 2B is a transmission of a PCIE signal according to an embodiment of the present invention
  • Another structural block diagram of the device
  • 2C is a block diagram of still another structure of a PCIE signal transmission device according to an embodiment of the present invention
  • FIG. 2D is a block diagram showing another structure of a PCIE signal transmission device according to an embodiment of the present invention
  • FIG. 1 is a flowchart of a method for transmitting a PCIE signal according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for transmitting a PCIE signal, where the method may include:
  • the peer device is a device that interacts with the local device, and the peer device is external to the local device, for example, the peer device and the device. End devices can be connected by fiber optics.
  • the peer device may be an external device that is a communication peer and receives the PCIE electrical signal.
  • the method may further include: before sending the PCIE optical signal to the peer device, as described in step 13, the method further includes:
  • the sending, by the peer device, the transmitting the PCIE optical signal in the step 13 may be: connecting to the The peer device sends and transmits the PCIE optical signal.
  • the establishing an optical transmission link connection with the peer device may include:
  • the response signaling of the peer device is received, establishing an optical transmission link connection with the peer device; If the response signaling of the peer device is not received, the handshake signaling is repeatedly sent to the peer device until an optical transport link connection is established with the peer device.
  • the method for transmitting the PCIE signal provided by the embodiment of the present invention can realize the transmission of the PCIE signal when the optical transmission link is normally connected, and can also perform corresponding processing when the optical transmission link connection is abnormal.
  • the method for transmitting the PCIE signal provided by the embodiment of the present invention may further include:
  • the sending the PCIE optical signal to the peer device by using the established optical transmission link connection may include:
  • the PCIE optical signal is sent to the opposite device through the established optical transmission link connection.
  • PCIE Peripheral Component Interconnect Express
  • the protocol conversion chip must be used for protocol conversion during communication. The use of a protocol conversion chip increases the design cost, and the protocol conversion process also reduces the efficiency of signal transmission. If the PCIE electrical signal is transmitted directly, the PCIE electrical signal is not suitable for long-distance transmission because of its weak anti-attenuation capability.
  • the method for transmitting a PCIE signal converts a PCIE electrical signal into a PCIE optical signal, and then transmits the data between the different devices through the PC IE optical signal, so that, on the one hand, the protocol conversion chip is not required.
  • the design cost of the protocol conversion chip can be saved, and the protocol conversion process is omitted, so that the transmission efficiency can be improved.
  • the PC IE optical signal since the PC IE optical signal has strong anti-attenuation capability, it can also be suitable for long-distance transmission.
  • the method may further include:
  • the distorted PCIE electrical signal is restored to a distortion-free PCIE electrical signal
  • converting the generated PCIE electrical signal into a PCIE optical signal as described in step 12 includes:
  • the distortion in the generated PCIE electrical signal can be eliminated, thereby ensuring that the PCIE signal for photoelectric conversion is a distortion-removed PCIE electrical signal, and the accuracy of the PCIE signal to be transmitted is improved.
  • the method may further include:
  • the method may further include:
  • the converted PCIE electrical signal is subjected to anti-attenuation processing to increase the anti-attenuation capability of the PCIE signal. In this way, it is ensured that the converted PCIE electrical signal is more easily identified.
  • the embodiment of the present invention further provides a PCIE signal transmission device. Referring to FIG. 2A, an embodiment of the present invention provides a PCIE signal transmission device 20, where the device 20 includes a controller 21 and a photoelectric converter. 22 , where:
  • the controller 21 is configured to generate a PCIE electrical signal that needs to be sent to the peer device, where the peer device is a device that generates the PCIE electrical signal;
  • the photoelectric converter 22 is configured to convert the PCIE electrical signal generated by the controller 21 into a PCIE optical signal; and send the PCIE optical signal to the opposite device.
  • the photoelectric converter 22 is further configured to: Receiving a PCIE optical signal sent by the peer device;
  • the controller 21 may be a PCIE root device or a switch chip, and the main functions include transmitting and receiving PCIE electrical signals.
  • the main function of the photoelectric converter 22 includes converting the PCIE electrical signal sent by the controller 21 into a PCIE optical signal, and transmitting the optical signal to the opposite device through the optical fiber; and receiving the optical signal from the opposite device from the optical fiber.
  • the conversion to an electrical signal is sent to the controller 21.
  • the PCIE signal transmission device converts the PCIE electrical signal into a PCIE optical signal through the photoelectric converter, and then uses the PCIE optical signal to transmit between different devices, thereby not only improving transmission efficiency and saving design cost, but also Also suitable for long distance transmission.
  • the controller 21 may be further configured to: establish an optical transmission link with the peer device. Connection
  • the optoelectronic converter 22 is specifically configured to: send the PCIE optical signal to the peer device by using the established optical transmission link connection.
  • the process of establishing the optical transmission link connection between the controller 21 and the peer device may be:
  • the controller 21 sends handshake signaling to the peer device to perform a connection attempt; the controller 21, if receiving the response signaling of the peer device, establishes an optical transmission link with the peer device.
  • the controller 21 If the controller 21 does not receive the response signaling of the peer device within a preset time, the controller 21 repeatedly sends the handshake signaling to the peer device until the response signaling of the peer device is received. And establishing an optical transmission link connection with the peer device.
  • the controller 21 can also detect whether the established optical transmission link connection is abnormal and perform abnormal processing. Specifically, the controller 21 can be used to:
  • the photoelectric converter 22 may be specifically configured to: if the controller 21 detects that the optical transmission link is connected normally, the optical transmission link established by the controller 21 continues to transmit to the opposite device The PCIE optical signal is described.
  • the controller 21 and the photoelectric converter 22 are provided with PCIE ports, and the controller 21 and the photoelectric converter 22 can be connected to respective PCIE ports through control signal lines.
  • the control signal line can be used to transmit an in-position detection signal for determining whether the photoelectric converter 22 is connected to the controller 21 if the optical transmission link is abnormally connected; the controller 21 can Whether the level of the in-position detection signal transmitted by the control signal line is reversed to perform corresponding abnormal processing.
  • controller 21 can be used to:
  • the PCIE port corresponding to the abnormal optical transmission link connection is closed; if no inversion occurs, the PCIE port corresponding to the abnormal optical transmission link connection is restarted, and the restart is performed through the restart.
  • the PCIE port sends handshake signaling to re-establish an optical transport link connection with the peer device.
  • in-position means that the photoelectric converter has been properly connected to its corresponding PCIE port.
  • the inversion of the level of the bit detection signal may refer to the level of the bit detection signal changing from a high level to a low level or a low level to a high level.
  • the present invention is not limited to the level of the in-position detection signal from the rising edge to the falling edge or from the falling edge to the rising edge. As long as the level change of the in-position detection signal can be expressed, the photoelectric conversion can be accurately distinguished. Whether the device is connected for the purpose.
  • the PCIE electrical signal transmitted between the controller 21 and the photoelectric converter 22 may have transmission loss such as distortion.
  • at least one of the equalizer and the driver may be provided between the controller 21 and the photoelectric converter 22.
  • the PCIE electrical signal transmitted between the controller 21 and the photoelectric converter 22 can be transmitted to the controller 21 or the photoelectric converter 22 via an equalizer or driver.
  • the apparatus may further include an equalizer 23 in addition to the controller 21 and the photoelectric converter 22.
  • the equalizer 23 can be disposed on the controller 21 and the photoelectric converter 22 Between the two ends, the controller 21 is connected, and the other end is connected to the photoelectric converter 22.
  • the equalizer 23 is configured to: after the controller 21 generates a PCIE electrical signal that needs to be sent to the peer device, and before the photoelectric converter 22 converts the PCIE electrical signal generated by the controller into a PCIE optical signal, Determining whether there is distortion in the PCIE electrical signal generated by the controller 21; if it is determined that the generated PCIE electrical signal is distorted, recovering the distorted PCIE electrical signal to a distortion-free PCIE electrical signal;
  • the photoelectric converter 22 can be specifically used for:
  • the equalizer 23 is restored to a distortion-free PCIE electrical signal converted to a PCIE optical signal.
  • the apparatus further includes a driver 24 in addition to the controller 21 and the photoelectric converter 22.
  • the driver 24 may be disposed between the controller 21 and the photoelectric converter 22, one end of which is connected to the controller 21, and the other end of which is connected to the photoelectric converter 22.
  • the driver 24 is configured to perform anti-attenuation processing on the PCIE electrical signal converted by the photoelectric converter 22 after the photoelectric converter 22 converts the received PCIE optical signal into a PCIE electrical signal, so that the The anti-attenuation capability of the PCIE electrical signal is increased.
  • the apparatus in addition to including the controller 21 and the photoelectric converter 22, may include both the equalizer 23 and the driver 24. Both the equalizer 23 and the driver 24 are disposed between the controller 21 and the photoelectric converter 22. One end of the equalizer 23 is connected to the controller 21, and the other end is connected to the photoelectric converter 22. Similarly, one end of the driver 24 is connected to the controller 21, and the other end is connected to the photoelectric converter 22.
  • the equalizer 23 is configured to: after the controller 21 generates a PCIE electrical signal that needs to be sent to the peer device, and before the photoelectric converter 22 converts the PCIE electrical signal generated by the controller into a PCIE optical signal, Determining whether there is distortion in the PCIE electrical signal generated by the controller 21; if it is determined that the generated PCIE electrical signal is distorted, recovering the distorted PCIE electrical signal to a distortion-free PCIE electrical signal;
  • the driver 24 is configured to perform anti-attenuation processing on the PCIE electrical signal converted by the photoelectric converter 22 after the photoelectric converter 22 converts the received PCIE optical signal into a PCIE electrical signal, so that the The anti-attenuation capability of the PCIE electrical signal is increased.
  • equalizer 23 and the driver 24 are described as independent devices, but the present invention is not limited thereto, and as long as the corresponding functions can be implemented within the scope of the present invention, Equalizer 23 and/or driver 24 integrated in the photoelectric converter In 21, the functions of the equalizer 23 and/or the driver 24 are completed by the photoelectric converter 21.
  • the controller 21 may first determine whether there is a photoelectric device. The converter is connected and the opto-electrical converter is enabled when a photoelectric converter is connected.
  • control signal line can be used to transmit an in-position detection signal to the controller 21, and the in-position detection signal can be used by the controller 21 to determine whether the photoelectric converter 22 is connected.
  • the controller 21 is entered.
  • the process of determining, by the controller 21, whether a photoelectric converter is accessed may be: the controller 21 receiving an in-position detection signal transmitted by the control signal line;
  • the controller 21 determines whether the level of the in-position detection signal is inverted; if inversion occurs, it is determined that the photoelectric converter is connected; if no inversion occurs, it is determined that no photoelectric converter is connected.
  • the controller 21 may specifically enable the photoelectric converter 22 to: the controller 21 disables the reset signal of the photoelectric converter.
  • the reset signal is generated by the controller 21.
  • the reset signal of the photoelectric converter is used to reset the photo-electric converter 22, i.e., to restore the initial setting of the photoelectric converter 22.
  • the reset signal of the photoelectric converter does not restore the initial setting of the photoelectric converter 22 when it is inactive.
  • the access checker can be used to set the entry threshold to ensure the normal use of the photoelectric converter.
  • the access threshold can be, for example, a support rate, a model, etc. of the photoelectric converter.
  • the transmission device of the PCIE signal provided by the embodiment of the present invention may further include an admission verifier.
  • the control signal line may also be used to transmit configuration information of the photoelectric converter 22 to the controller 21; the controller 21 is further configured to receive a configuration of the photoelectric converter 22 for transmitting the control signal line Information, and the configuration information of the photoelectric converter 22 is sent to the admission verifier.
  • the admission checker is configured to determine, according to the configuration information of the photoelectric converter 22 sent by the controller 21, whether to allow the photoelectric converter 22 to access the controller 21, and whether to allow The verification result of the photoelectric converter 22 being connected to the controller 21 is notified to the controller 21.
  • the controller 21 may be specifically configured to: if it is determined that the photoelectric converter is accessed, and the verification result of the admission checker is to allow the photoelectric converter to be accessed, the photoelectric converter is enabled.
  • the access checker may be implemented in the form of hardware or in the form of software.
  • the software can be embedded in specific hardware.
  • control signal line in the embodiment of the present invention may be a parallel control signal line, or may be a serial control signal line, or a specific type of control having functions of parallel control signal lines and serial control signal lines. Signal line.
  • the present invention does not distinguish this, as long as the control signal line can achieve the corresponding function.
  • the control signal line in the embodiment of the present invention can implement other additional functions, such as a mode detection function for detecting an operation mode of the photoelectric converter, and is used for control. Whether the photoelectric converter operates in a low power mode or a mode selection function of a high power mode.
  • a mode detection function for detecting an operation mode of the photoelectric converter
  • this embodiment provides a PCIE signal transmission device, and the process of transmitting a PCIE signal by using the device is as follows:
  • the settings include: PCIE width, maximum support rate, and whether the port is reversed.
  • the controller closes the PCIE port on the controller that needs to establish an optical communication link connection, and sends a reset signal to the photoelectric converter through the parallel control signal line to complete preparation for establishing the optical transmission link.
  • the reset signal is used to restore an initial setting of the photoelectric converter.
  • the photoelectric converter receives the reset signal, and completes the initial setting according to the reset signal.
  • the controller detects an in-position detection signal.
  • the in-position detection signal carries information indicating whether the photoelectric converter is in position, and the information includes a level.
  • "in-position" means that the photoelectric converter has been properly connected to its corresponding PCIE port.
  • the controller determines, according to the in-position detection signal, whether there is a photoelectric converter In. Specifically, the controller may determine whether the photoelectric converter access is accessed by determining whether the level of the bit detection signal is inverted. When the photoelectric converter is not connected to the PCIE port, the level of the in-position detection signal does not reverse, and when the photoelectric converter is connected to the PCIE port of the controller, the level of the in-position detection signal can be triggered to be reversed. turn.
  • the inversion of the level of the bit detection signal may refer to the level of the bit detection signal changing from a high level to a low level or a low level to a high level.
  • the level of the in-position detection signal changes from a rising edge to a falling edge or from a falling edge to a rising edge.
  • the present invention does not limit this, as long as it can indicate the level change of the in-position detection signal, and accurately distinguish whether or not to connect.
  • the purpose of the entry can be.
  • controller determines that no photoelectric converter is connected, it remains in the current state, and does not perform the subsequent steps; if the controller determines that the photoelectric converter is connected, the following steps 36 to 46 are continued.
  • the controller acquires configuration information of the photoelectric converter through a serial control signal line, where the configuration information may be a manufacturer of the photoelectric converter, a support rate of the photoelectric converter, a model, and the like. Specifically, the controller may send a signaling for acquiring configuration information to the photoelectric converter via the serial control signal line, and after receiving the signaling, the photoelectric converter feeds back the configuration information of the controller to the controller.
  • the controller reports the acquired configuration information of the photoelectric converter and the photoelectric converter access event to the admission verifier.
  • the admission checker receives configuration information of the photoelectric converter reported by the controller; and determines whether to allow the photoelectric converter to access according to the configuration information of the photoelectric converter. Specifically, the access checker compares the acquired configuration information of the photoelectric converter with its own policy information, where the policy information includes an acceptable manufacturer, model, support rate, etc., and detects the acquired photoelectric converter. Whether the configuration information conforms to its own policy information. If it is met, the photoelectric converter is allowed to access. If it does not, it will alarm and prompt to replace the photoelectric converter.
  • the admission verifier informs the controller of the verification result of allowing the photoelectric converter to access when the optoelectronic converter is allowed to access.
  • setting the reset signal of the photoelectric converter to be invalid may specifically be an effective state of releasing the reset signal. For example, if the reset signal is active low, the active state of the reset signal can be released by setting the reset signal to a high level; if the reset signal is high When the level is valid, the effective state of the reset signal can be released by setting the reset signal to a low level.
  • steps (6) to (9) in this embodiment are optional steps, and steps (6) to (9) may be skipped directly without setting an admission policy.
  • the step (10) may be changed, and if the controller determines that the photoelectric converter is connected, the reset signal of the photoelectric converter is invalidated. And turn on the PCIE port that needs to communicate with optical.
  • the controller sends handshake signaling to the peer device by using the PCIE port that needs to perform optical communication, to perform a connection attempt.
  • the controller repeatedly sends the handshake signaling when the response signaling of the peer device is not received; after receiving the response signaling of the peer device, the controller may continue to complete the establishment with the peer device. The subsequent process of link connection.
  • the controller establishes a link connection with the peer device according to the PCIE protocol.
  • the controller sends a PCIE electrical signal to the photoelectric converter after the link connection is established.
  • an equalizer is provided between the controller and the photoelectric converter.
  • the equalizer has the functions of amplifying the amplitude of the received PCIE electrical signal, reducing the attenuated distortion waveform, and dynamically adjusting the decision threshold of the PCIE electrical signal. According to the actual design requirements of the system, whether to add the module, whether to select all or part of the module function can be selected.
  • the PCIE electrical signal sent by the controller will first reach the equalizer.
  • the equalizer receives the PCIE electrical signal sent by the controller, and when the received PCIE electrical signal is distorted, restores the distorted PCIE electrical signal to a PCIE electrical signal recognizable by the photoelectric converter, and then sends the electrical signal to the photoelectric converter.
  • the photoelectric converter receives a PCIE electrical signal, converts the received PCIE electrical signal into a PCIE optical signal, and sends the PCIE optical signal to the opposite device through an optical fiber.
  • the photoelectric converter receives a PCIE optical signal sent by the opposite device, converts the PCIE optical signal into a PCIE electrical signal, and sends the PCIE electrical signal to an internal controller.
  • a driver may be provided between the controller of the local device and the photoelectric converter. If the driver is present, the electrical signal sent by the photoelectric converter to the controller will first arrive at the driver and then sent to the controller by the driver; and when the driver does not exist, the photoelectric converter will directly send the electrical signal to the controller.
  • the main functions of the driver include the overall adjustment of the PCIE electrical signal. The transmission amplitude, the amplitude of the transmission of the selective adjustment part of the signal, and the like. According to the actual design requirements of the system, whether to add the module, whether to select all or part of the module function can be selected.
  • the driver After receiving the PCIE electrical signal sent by the photoelectric converter, the driver increases the anti-attenuation capability of the PCIE electrical signal and reduces the influence of signal transmission loss, so that the controller can receive the normally recognized PCIE electrical signal and send it to the internal controller.
  • the controller receives the PCIE electrical signal. After the above steps, the entire transmission process of the PCIE signal can be completed. Subsequent signal transmissions are repeated as such.
  • the equalizer and/or the driver may not be provided according to actual needs, and the equalizer and/or the driver may be disposed.
  • the equalizer and / or driver can be set as a separate unit inside the network device or integrated in the photoelectric converter.
  • the equalizer and the driver are set at the same time, either one can be set inside the network device and the other can be integrated on the photoelectric converter.
  • the description is made by way of example only, and the present invention does not impose any specific limitation on the setting of the equalizer and/or the driver.
  • the method for transmitting a PCIE signal can convert the PCIE electrical signal into a PCIE optical signal, and then transmit the PCIE optical signal between different devices, thereby improving transmission efficiency, reliability, and design cost, and Also suitable for long distance transmission.
  • each device included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented;
  • the specific names of the functional devices are also only for convenience of distinction from each other, and are not intended to limit the scope of protection of the present invention.

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Abstract

本发明提供一种PCIE信号的传输方法,涉及通信领域,不仅能够提升传输效率、可靠性,节省设计成本,而且还适合长距离传输。所述方法包括:生成需要发送给对端设备的PCIE电信号,所述对端设备为生成所述PCIE电信号之外的设备;将所述生成的PCIE电信号转换为PCIE光信号;向所述对端设备发送所述PCIE光信号。本发明还提供相应的设备。

Description

PC IE信号的传输方法和设备
技术领域 本发明涉及通信领域, 尤其涉及 PCIE(Peripheral Component Interconnect Express, 高速周边组件互连)信号的传输方法和设备。 背景技术
目前计算机、 存储类产品的架构大多以 PCIE总线为基础进行扩展。 由于 PCIE总线抗衰减能力弱, 传输距离短, 因而, 一般只适于设备内部 的通信链路使用。 当相距较远的不同设备之间需要进行通讯时, 需要先 通过协议转换芯片将设备内部的 PCIE信号转换为其他协议信号(如千兆 以太网信号等) , 然后进行传输才能实现该设备与其他外部设备之间的 通信。
釆用此种实现方式, 由于在通信过程中必须使用协议转换芯片进行 协议转换, 因而会带来传输效率降低、 设计成本上升等问题。 而如果直 接以 PCIE信号进行传输, 又无法克服 PCIE信号的抗衰减能力弱、 传输 距离短等问题。
发明内容
本发明提供一种 PCIE信号的传输方法和设备,不仅能够提升传输效 率, 节省设计成本, 而且还适合长距离传输。 第一方面, 提供一种 PCIE信号的传输方法, 所述方法包括: 生成需要发送给对端设备的 PCIE电信号,所述对端设备为生成所述 PCIE电信号之外的设备; 将所述生成的 PCIE电信号转换为 PCIE光信号;
向所述对端设备发送所述 PCIE光信号。 在第一方面的第一种可能的实现方式中, 在所述生成需要发送给对 端设备的 PCIE电信号之后, 且在所述将所述生成的 PCIE电信号转换为 PCIE光信号之前, 所述方法还包括: 确定所述生成的 PCIE电信号是否存在失真; 如果确定所述生成的 PCIE电信号存在失真, 将所述失真的 PCIE电 信号恢复为无失真的 PCIE电信号;
所述将所述生成的 PCIE电信号转换为 PCIE光信号包括:
将所述恢复为无失真的 PCIE电信号转换为 PCIE光信号。
在第一方面的第二种可能的实现方式中, , 所述方法还包括: 接收所述对端设备发送的 PCIE光信号;
将所述接收的 PCIE光信号转换为 PCIE电信号。
结合第一方面的第二种可能的实现方式, 在第一方面的第三种可能 的实现方式中, 在所述将所述接收的 PCIE光信号转换为 PCIE电信号之 后, 所述方法还包括: 对所述转换后的 PCIE电信号进行抗衰减处理, 以使所述 PCIE电信 号的抗衰减能力增加。 结合第一方面的上述任一种可能的实现方式, 在第一方面的第四种 可能的实现方式中, 在所述向所述对端设备发送所述 PCIE光信号之前, 所述方法还包括:
与所述对端设备建立光传输链路连接; 所述向所述对端设备发送所述 PCIE光信号具体为:通过所述建立的 光传输链路连接向所述对端设备发送所述 PCIE光信号。 结合第一方面的第四种可能的实现方式, 在第一方面的第五种可能 的实现方式中, 所述与所述对端设备建立光传输链路连接包括:
向所述对端设备发送握手信令, 以进行连接尝试; 若接收到所述对端设备的响应信令, 与所述对端设备建立光传输链 路连接; 若未接收到所述对端设备的响应信令, 则向所述对端设备重复发送 握手信令, 直到与所述对端设备建立光传输链路连接。 结合第一方面的第四种可能的实现方式, 在第一方面的第六种可能 的实现方式中, 在所述与对端设备建立光传输链路连接之后, 所述方法 还包括:
检测所述建立的光传输链路连接是否异常; 如果检测到所述光传输链路连接异常, 则进行如下处理:
停止使用异常的所述光传输链路连接传输所述 PCIE光信号; 或者
与所述对端设备重新建立光传输链路连接, 以使用所述重新建立的 光传输链路连接传输所述 PCIE光信号;
所述通过所述建立的光传输链路连接向所述对端设备发送所述 PCIE光信号包括:
如果检测到所述光传输链路连接正常, 通过所述建立的光传输链路 连接向所述对端设备发送所述 PCIE光信号。
第二方面, 提供一种 PCIE信号的传输设备, 所述设备包括: 控制器, 用于生成需要发送给对端设备的 PCIE电信号, 所述对端设 备为生成所述 PCIE电信号之外的设备; 光电转换器, 用于将所述控制器生成的 PCIE电信号转换为 PCIE光 信号; 并向所述对端设备发送所述 PCIE光信号。
在第二方面的第一种可能的实现方式中, 所述设备还包括: 均衡器,用于在所述控制器生成需要发送给对端设备的 PCIE电信号 之后,且在所述光电转换器将所述控制器生成的 PCIE电信号转换为 PCIE 光信号之前, 确定所述控制器生成的 PCIE电信号是否存在失真; 如果确 定所述生成的 PCIE电信号存在失真, 将所述失真的 PCIE电信号恢复为 无失真的 PCIE电信号; 所述光电转换器具体用于: 将所述均衡器恢复为无失真的 PCIE电信号转换为 PCIE光信号。 在第二方面的第二种可能的实现方式中, 所述光电转换器还用于: 接收所述对端设备发送的 PCIE光信号; 将所述接收的 PCIE光信号转换为 PCIE电信号。
结合第一方面的第二种可能的实现方式, 在第二方面的第三种可能 的实现方式中, 所述设备还包括:
驱动器, 用于在所述光电转换器将所述接收的 PCIE 光信号转换为 PCIE 电信号之后, 对经所述光电转换器转换后的 PCIE 电信号进行抗衰 减处理, 以使所述 PCIE电信号的抗衰减能力增加。
结合第二方面的上述任一种可能实现方式, 在第二方面的第三种可 能的实现方式中, 所述控制器还用于: 在所述光电转换器向所述对端设 备发送所述 PCIE光信号之前, 与所述对端设备建立光传输链路连接; 所述光电转换器具体用于: 通过所述建立的光传输链路连接向所述 对端设备发送所述 PCIE光信号。
结合第二方面的第三种可能的实现方式, 在第二方面的第四种可能 的实现方式中, 所述控制器具体用于:
向所述对端设备发送握手信令, 以进行连接尝试; 若接收到所述对端设备的响应信令, 与所述对端设备建立光传输链 路连接;
若未接收到所述对端设备的响应信令, 则向所述对端设备重复发送 握手信令, 直到与所述对端设备建立光传输链路连接。
结合第二方面的第三种可能的实现方式, 在第二方面的第五种可能 的实现方式中, 所述控制器在与所述对端设备建立光传输链路连接之后, 还用于:
检测所述建立的光传输链路连接是否异常;
如果检测到所述光传输链路连接异常, 则进行如下处理:
停止使用异常的所述光传输链路连接传输所述 PCIE光信号; 或者
与所述对端设备重新建立光传输链路连接, 以使用所述重新建立的 光传输链路连接传输所述 PCIE光信号; 所述光电转换器具体用于: 如果所述控制器检测到所述光传输链路 连接正常, 通过所述控制器建立的光传输链路连接向所述对端设备发送 所述 PCIE光信号。
在第二方面的第六种可能的实现方式中, 所述控制器还用于: 在所述光电转换器将所述控制器生成的 PCIE电信号转换为 PCIE光 信号之前, 确定是否有光电转换器接入; 若确定有光电转换器接入, 则 启用所述光电转换器。
结合第二方面的第六种可能实现, 在第二方面的第七种可能的实现 方式中, 所述控制器和所述光电转换器通过控制信号线而连接, 所述控 制信号线用于向所述控制器传输所述光电转换器的配置信息;
所述控制器, 还用于接收所述控制信号线传输的所述光电转换器的 配置信息, 并将所述光电转换器的配置信息发送给准入核查器;
所述设备还包括:
准入核查器, 用于根据所述控制器发送的所述光电转换器的配置信 息, 确定是否允许所述光电转换器接入到所述控制器, 并将是否允许所 述光电转换器接入到所述控制器的核查结果告知所述控制器;
所述控制器具体用于: 若确定有光电转换器接入, 且所述准入核查 器的核查结果为允许所述光电转换器接入, 则启用所述光电转换器。
结合第二方面的第七种可能实现, 在第二方面的第八种可能的实现 方式中, 所述控制信号线用于向所述控制器传输用来确定光电转换器是 否接入的在位侦测信号; 所述控制器具体用于: 接收所述控制信号线传输的在位侦测信号; 确定所述在位侦测信号的电平是否发生反转; 若发生反转, 则确定有光电转换器接入;
若未发生反转, 则确定没有光电转换器接入。
在第二方面的第九种可能的实现方式中, 所述控制器和所述光电转 换器上设置 PCIE端口, 所述控制器和所述光电转换器通过控制信号线而 连接到各自的 PCIE端口上, 所述控制信号线用于若所述光传输链路连接 异常, 则向所述控制器传输用来确定光电转换器是否接入的在位侦测信 号;
所述控制器具体用于: 接收所述控制信号线传输的在位侦测信号; 确定所述在位侦测信号的电平是否发生反转;
若发生反转, 则关闭异常的所述光传输链路连接所对应的 PCIE 端 口; 若未发生反转, 则重启异常的所述光传输链路连接所对应的 PCIE端 口, 并通过所述重启的 PCIE端口发送握手信令以与所述对端设备重新建 立光传输链路连接。
釆用上述技术方案后, 本发明提供的 PCIE信号的传输方法和设备, 通过将 PCIE电信号转换为 PCIE光信号, 进而通过 PCIE光信号在不同 的设备之间进行传输, 不仅能够提升传输效率、 节省设计成本, 而且还 适合长距离传输。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将 对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见 地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技 术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得 其他的附图。 图 1为本发明实施例提供的 PCIE信号的传输方法的流程图; 图 2A为本发明实施例提供的 PCIE信号的传输设备的一结构框图; 图 2B为本发明实施例提供的 PCIE信号的传输设备的另一结构框图; 图 2C为本发明实施例提供的 PCIE信号的传输设备的又一结构框图; 图 2D为本发明实施例提供的 PCIE信号的传输设备的再一结构框图; 图 3为利用本发明实施例提供的 PCIE信号的传输设备进行 PCIE信 号传输的具体流程图。
具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例的技术方案进 行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明的一部分实 施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术 人员在没有做出创造性劳动的前提下所获得的所有其它实施例, 都属于 本发明保护的范围。
图 1为本发明实施例提供的 PCIE信号的传输方法的流程图。参照图 1 , 本发明实施例提供一种 PCIE信号的传输方法, 所述方法可包括:
11、 生成需要发送给对端设备的 PCIE电信号, 所述对端设备为生成 所述 PCIE电信号之外的设备;
12、 将所述生成的 PCIE电信号转换为 PCIE光信号;
13、 向所述对端设备发送所述 PCIE光信号。
在本发明实施例中, 若将生成 PCIE电信号的设备称为本端设备, 则 对端设备为与本端设备进行交互的设备, 对端设备处于本端设备外部, 例如对端设备与本端设备可通过光纤相连。 具体而言, 所述对端设备可 以为作为通信对端、 接收所述 PCIE电信号的外部设备。
其中, 在步骤 13所述向所述对端设备发送所述 PCIE光信号之前, 所述方法还可包括:
与所述对端设备建立光传输链路连接;
在与所述对端设备建立光传输链路连接之后, 步骤 13中所述向所述 对端设备发送传输所述 PCIE光信号可具体为: 通过所述建立的光传输链 路连接向所述对端设备发送传输所述 PCIE光信号。
具体地, 所述与所述对端设备建立光传输链路连接可包括:
向所述对端设备发送握手信令, 以进行连接尝试;
若接收到所述对端设备的响应信令, 与所述对端设备建立光传输链 路连接; 若未接收到所述对端设备的响应信令, 则向所述对端设备重复发送 握手信令, 直到与所述对端设备建立光传输链路连接。
本发明实施例提供的 PCIE 信号的传输方法在光传输链路连接正常 的情况下能够实现 PCIE信号的传输,在光传输链路连接出现异常时也能 够进行相应处理。 具体而言, 在本发明的一个实施例中, 可选地, 在所 述与对端设备建立光传输链路连接之后,本发明实施例提供的 PCIE信号 的传输方法还可包括:
检测所述建立的光传输链路连接是否异常;
如果检测到所述光传输链路连接异常, 则进行如下处理:
停止使用异常的所述光传输链路连接传输所述 PCIE光信号; 或者
与所述对端设备重新建立光传输链路连接, 以使用所述重新建立的 光传输链路连接传输所述 PCIE光信号;
此时, 上面所述通过所述建立的光传输链路连接向所述对端设备发 送所述 PCIE光信号可包括:
如果检测到所述光传输链路连接正常, 则通过所述建立的光传输链 路连接向所述对端设备发送所述 PCIE光信号。
目前计算机、存储类产品架构大多以 PCIE总线为基础进行扩展。将 PCIE转换为千兆以太网等信号, 实现本机与外部设备之间的通信连接。 按照目前这种实现方式, 通信过程中必须使用协议转换芯片进行协议转 换。 而使用协议转换芯片会增加设计成本, 同时协议转换过程也会降低 信号传输的效率。 如果直接以 PCIE电信号进行传输, 由于 PCIE电信号 抗衰减能力弱, 因而不适于长距离传输。
本实施例提供的 PCIE信号的传输方法, 通过将 PCIE电信号转换为 PCIE光信号, 进而通过 PC IE光信号在不同的设备之间进行传输, 这样一 来, 一方面, 不需要通过协议转换芯片进行协议转换, 因而可以节省协 议转换芯片的设计成本, 同时省略了协议转换过程, 故而能够提升传输 效率, 另一方面, 由于 PC IE光信号抗衰减能力强, 因而还可适合于长距 离传输。
可选地, 在本发明 PCIE信号的传输方法的一个实施例中, 除了包括 上述步骤 11~13外, 在步骤 11所述生成需要发送给对端设备的 PCIE电 信号之后,且在步骤 12所述将所述生成的 PCIE电信号转换为 PCIE光信 号之前, 所述方法还可包括:
确定所述生成的 PCIE电信号是否存在失真;
如果确定所述生成的 PCIE电信号存在失真, 将所述失真的 PCIE电 信号恢复为无失真的 PCIE电信号;
此时, 步骤 12中所述将所述生成的 PCIE电信号转换为 PCIE光信 号包括:
将所述恢复为无失真的 PCIE电信号转换为 PCIE光信号。
这样, 可消除所生成的 PCIE电信号中的失真, 进而保证进行光电转 换的 PCIE信号为消除失真后的 PCIE 电信号, 提高要进行传输的 PCIE 信号的准确性。
可选地, 在本发明 PCIE信号的传输方法的另一个实施例中, 除了包 括上述步骤 11~13外, 所述方法还可包括:
接收所述对端设备发送的 PCIE光信号;
将所述接收的 PCIE光信号转换为 PCIE电信号。
其中, 在所述将所述接收的 PCIE光信号转换为 PCIE电信号之后, 进一步地, 所述方法还可包括:
对所述转换后的 PCIE电信号进行抗衰减处理, 以使所述 PCIE电信 号的抗衰减能力增加。 这样, 可保证所述转换后的 PCIE电信号更易被识 别。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分 步骤是可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一 种计算机可读存储介质中, 所述存储介质可以是只读存储器、 磁盘或光 盘等。 与上述方法相对应, 本发明实施例还提供一种 PCIE 信号的传输设 备, 参照图 2A, 本发明实施例提供一种 PCIE信号的传输设备 20 , 所述 设 20包括控制器 21和光电转换器 22 , 其中:
控制器 21 , 用于生成需要发送给对端设备的 PCIE电信号, 所述对 端设备为生成所述 PCIE电信号之外的设备;
光电转换器 22 , 用于将所述控制器 21 生成的 PCIE 电信号转换为 PCIE光信号; 并向所述对端设备发送所述 PCIE光信号。
可选地, 所述光电转换器 22还可用于: 接收所述对端设备发送的 PCIE光信号;
将所述接收的 PCIE光信号转换为 PCIE电信号。
在本发明实施例中, 控制器 21可以为 PCIE根设备或交换芯片, 主 要功能包括发送和接收 PCIE电信号。
光电转换器 22主要功能包括将控制器 21发出的 PCIE电信号转换为 PCIE光信号, 并通过光纤将所述光信号发送到对端设备; 以及将从光纤 接收到的来自对端设备的光信号转换为电信号发送给控制器 21。
本实施例提供的 PCIE信号的传输设备, 通过光电转换器将 PCIE电 信号转换为 PCIE光信号, 进而利用 PCIE光信号在不同的设备之间进行 传输, 不仅能够提升传输效率、 节省设计成本, 而且还适合长距离传输。
其中, 在本发明实施例中, 在所述光电转换器 22向所述对端设备发 送所述 PCIE光信号之前, 所述控制器 21还可用于: 与所述对端设备建 立光传输链路连接;
所述光电转换器 22具体用于: 通过所述建立的光传输链路连接向所 述对端设备发送所述 PCIE光信号。
具体地,所述控制器 21与所述对端设备建立光传输链路连接的过程 可以为:
所述控制器 21向所述对端设备发送握手信令, 以进行连接尝试; 所述控制器 21若接收到所述对端设备的响应信令, 与所述对端设备 建立光传输链路连接;
所述控制器 21若在预设时间内未接收到所述对端设备的响应信令, 则向所述对端设备重复发送握手信令, 直到收到所述对端设备的响应信 令, 进而与所述对端设备建立光传输链路连接。
所述控制器 21在与所述对端设备建立光传输链路连接之后,还可检 测所建立的光传输链路连接是否异常, 并进行异常处理。 具体地, 所述 控制器 21可用于:
检测所述建立的光传输链路连接是否异常;
如果检测到所述光传输链路连接异常, 则进行如下处理:
停止使用异常的所述光传输链路连接传输所述 PCIE光信号; 或者
与所述对端设备重新建立光传输链路连接, 以使用所述重新建立的 光传输链路连接传输所述 PCIE光信号; 所述光电转换器 22可具体用于: 如果所述控制器 21检测到所述光 传输链路连接正常, 通过所述控制器 21建立的光传输链路连接向所述对 端设备继续传输所述 PCIE光信号。
在本发明实施例中, 所述控制器 21 和所述光电转换器 22 上设置 PCIE端口, 所述控制器 21和所述光电转换器 22可通过控制信号线而连 接到各自的 PCIE端口上,所述控制信号线可用于若所述光传输链路连接 异常, 则向所述控制器 21传输用来确定光电转换器 22是否接入的在位 侦测信号; 所述控制器 21可根据所述控制信号线传输的在位侦测信号的 电平是否发生反转来进行相应的异常处理。
具体地, 所述控制器 21可用于:
接收所述控制信号线传输的在位侦测信号;
确定所述在位侦测信号的电平是否发生反转;
若发生反转, 则关闭异常的所述光传输链路连接所对应的 PCIE 端 口; 若未发生反转, 则重启异常的所述光传输链路连接所对应的 PCIE端 口, 并通过所述重启的 PCIE端口发送握手信令以与所述对端设备重新建 立光传输链路连接。
在本发明实施例中, "在位" 是指光电转换器已经和其对应的 PCIE 端口正确连接。
在本发明实施例中, 在位侦测信号的电平的反转可以指在位侦测信 号的电平从高电平变为低电平或从低电平变为高电平, 也可以指在位侦 测信号的电平从上升边缘变为下降边缘或从下降边缘变为上升边缘, 本 发明对此不作限定, 只要能表示在位侦测信号的电平变化, 实现准确区 分光电转换器是否接入的目的即可。
在本发明实施例中, 所述控制器 21和所述光电转换器 22之间传输 的 PCIE电信号可能存在失真等传输损耗。 因而, 为解决 PCIE电信号的 传输损耗问题, 可在所述控制器 21 和所述光电转换器 22之间设置均衡 器和驱动器二者中的至少一者。 这样, 在所述控制器 21和所述光电转换 器 22之间传输的 PCIE电信号可先经由均衡器或驱动器, 再传输至所述 控制器 21或所述光电转换器 22。
可选地, 在本发明 PCIE 信号的传输设备的另一个实施例中, 如图 2B所示, 除了包括控制器 21和光电转换器 22之外, 所述设备还可包括 均衡器 23。 所述均衡器 23可设置于所述控制器 21和所述光电转换器 22 之间, 一端连接所述控制器 21 , 另一端连接所述光电转换器 22。
均衡器 23 , 用于在所述控制器 21生成需要发送给对端设备的 PCIE 电信号之后, 且在所述光电转换器 22将所述控制器生成的 PCIE电信号 转换为 PCIE光信号之前,确定所述控制器 21生成的 PCIE电信号是否存 在失真;如果确定所述生成的 PCIE电信号存在失真,将所述失真的 PCIE 电信号恢复为无失真的 PCIE电信号;
所述光电转换器 22可具体用于:
将所述均衡器 23恢复为无失真的 PCIE电信号转换为 PCIE光信号。 可选地, 在本发明 PCIE 信号的传输设备的又一个实施例中, 如图 2C所示, 除了包括控制器 21和光电转换器 22之外, 所述设备还包括驱 动器 24。所述驱动器 24可设置于所述控制器 21和所述光电转换器 22之 间, 一端连接所述控制器 21 , 另一端连接所述光电转换器 22。
驱动器 24 , 用于在所述光电转换器 22将所述接收的 PCIE光信号转 换为 PCIE电信号之后,对经所述光电转换器 22转换后的 PCIE电信号进 行抗衰减处理, 以使所述 PCIE电信号的抗衰减能力增加。
可选地, 在本发明的再一个实施例中, 如图 2D所示, 除了包括控制 器 21和光电转换器 22 ,所述设备还可同时包括均衡器 23和驱动器 24二 者。 均衡器 23和驱动器 24均可设置于控制器 21和光电转换器 22之间。 均衡器 23 的一端连接所述控制器 21 , 另一端连接所述光电转换器 22。 类似地, 驱动器 24的一端连接所述控制器 21 , 另一端连接所述光电转换 器 22。
均衡器 23 , 用于在所述控制器 21生成需要发送给对端设备的 PCIE 电信号之后, 且在所述光电转换器 22将所述控制器生成的 PCIE电信号 转换为 PCIE光信号之前,确定所述控制器 21生成的 PCIE电信号是否存 在失真;如果确定所述生成的 PCIE电信号存在失真,将所述失真的 PCIE 电信号恢复为无失真的 PCIE电信号;
驱动器 24 , 用于在所述光电转换器 22将所述接收的 PCIE光信号转 换为 PCIE电信号之后,对经所述光电转换器 22转换后的 PCIE电信号进 行抗衰减处理, 以使所述 PCIE电信号的抗衰减能力增加。
需要指出的是, 在上面的实施例中是将均衡器 23和驱动器 24作为 独立的器件来进行描述, 但本发明不限于此, 在本发明的范围内, 只要 能实现相应功能, 也可以将均衡器 23和 /或驱动器 24集成于光电转换器 21中, 由光电转换器 21来完成均衡器 23和 /或驱动器 24的功能。
同时还需要指出的是, 在本发明实施例中, 在所述光电转换器 22将 所述控制器 21生成的 PCIE电信号转换为 PCIE光信号之前,所述控制器 21 可先确定是否有光电转换器接入, 并在有光电转换器接入时, 启用所 述光电转换器。
在本发明实施例中, 所述控制信号线可用于向所述控制器 21传输在 位侦测信号, 所述在位侦测信号可被所述控制器 21用来确定光电转换器 22是否接入到所述控制器 21。
具体地, 所述控制器 21确定是否有光电转换器接入的过程可以为: 所述控制器 21接收所述控制信号线传输的在位侦测信号;
所述控制器 21确定所述在位侦测信号的电平是否发生反转; 若发生反转, 则确定有光电转换器接入; 若未发生反转, 则确定没 有光电转换器接入。
其中, 所述控制器 21启用所述光电转换器 22具体可以为: 所述控 制器 21将所述光电转换器的复位信号置为无效。 在本发明实施例中, 复 位信号由所述控制器 21产生。 所述光电转换器的复位信号用于将所述光 电转换器 22复位, 即恢复所述光电转换器 22 的初始化设置。 所述光电 转换器的复位信号在无效时不恢复所述光电转换器 22的初始化设置。
同时需要指出的是, 在本发明实施例中, 可能出现光电转换器 22不 适于使用的情况, 例如光电转换器 22 已损坏、 光电转换器 22与控制器 21 不兼容等。 此时, 可利用准入核查器来设定准入门槛以保证光电转换 器的正常使用。 所述准入门槛例如可以为光电转换器的支持速率、 型号 等。 具体地, 在本发明的一个实施例中, 本发明实施例提供的 PCIE信号 的传输设备还可包括准入核查器。
所述控制信号线还可用于向所述控制器 21 传输所述光电转换器 22 的配置信息; 所述控制器 21 , 还用于接收所述控制信号线传输的所述光 电转换器 22的配置信息, 并将所述光电转换器 22 的配置信息发送给准 入核查器。
所述准入核查器, 用于根据所述控制器 21 发送的所述光电转换器 22的配置信息, 确定是否允许所述光电转换器 22接入到所述控制器 21 , 并将是否允许所述光电转换器 22接入到所述控制器 21 的核查结果告知 所述控制器 21。 所述控制器 21可具体用于: 若确定有光电转换器接入, 且所述准入 核查器的核查结果为允许所述光电转换器接入, 则启用所述光电转换器。
其中, 在本发明实施例中, 所述准入核查器可以以硬件的形式实现, 也可以以软件的形式实现。 在用软件的形式实现时, 可将该软件嵌入于 具体的硬件中。
需注意的是,本发明实施例中的控制信号线可以为并行控制信号线, 也可以为串行控制信号线, 或具有并行控制信号线和串行控制信号线二 者功能的特定类型的控制信号线。 本发明并未对此加以区分, 只要控制 信号线能实现相应的功能即可。 而且, 本发明实施例中的控制信号线除 了在位侦测、 复位功能之外, 还可以实现其他额外的功能, 例如用于侦 测光电转换器的工作模式的模式侦测功能、 用于控制光电转换器工作在 低功耗模式还是高功耗模式的模式选择功能等。 为更好的理解本发明, 下面以具体实施例为例来对本发明进行进一 步说明。 亦须注意, 以下所列举的实施例只是本发明的一部分实施例, 本领域技术人员由本发明所述内容, 可易于想到其他实施例, 它们都在 本发明的范围内。
参照图 3 , 本实施例提供一种 PCIE信号的传输设备, 利用所述设备 进行 PCIE信号的传输的过程具体如下:
31、 本端设备内的控制器在上电后, 对设定进行初始化, 其中, 设 定的内容包括: PCIE宽度、 最大支持速率、 端口是否反转等信息。
32、 所述控制器在初始化完成后, 关闭所述控制器上需要建立光通 信链路连接的 PCIE端口,并通过并行控制信号线向光电转换器发送复位 信号, 完成光传输链路建立的准备工作, 其中, 所述复位信号用于恢复 光电转换器的初始化设置。
33、 光电转换器接收所述复位信号, 并根据所述复位信号, 完成初 始化设置。
34、 所述控制器检测在位侦测信号。 其中, 所述在位侦测信号携带 表示光电转换器是否在位的信息, 所述信息包括电平。 在本发明实施例 中, "在位" 是指光电转换器已经和其对应的 PCIE端口正确连接。
35、 所述控制器根据所述在位侦测信号, 确定是否有光电转换器接 入。 具体地, 控制器可以通过确定在位侦测信号的电平是否发生反转来 确定光电转换器接入是否接入。 在光电转换器没有接入 PCIE端口时, 在 位侦测信号的电平不发生反转, 而在光电转换器接入控制器的 PCIE端口 时, 可触发在位侦测信号的电平发生反转。
在本发明实施例中, 在位侦测信号的电平的反转可以指在位侦测信 号的电平从高电平变为低电平或从低电平变为高电平, 也可以指在位侦 测信号的电平从上升边缘变为下降边缘或从下降边缘变为上升边缘, 本 发明对此不作限定, 只要能表示在位侦测信号的电平变化, 实现准确区 分是否接入的目的即可。
所述控制器若确定没有光电转换器接入, 保持在当前状态, 不进行 后续步骤; 所述控制器若确定有光电转换器接入, 则继续执行下面的步 骤 36~ 46。
36、 所述控制器通过串行控制信号线获取光电转换器的配置信息, 所述配置信息可以为光电转换器的生产厂家、 光电转换器的支持速率、 型号等。 具体地, 控制器可以经由串行控制信号线向光电转换器发送一 个获取配置信息的信令, 光电转换器在接收到该信令后, 向控制器反馈 自身的配置信息。
37、 所述控制器将所获取的光电转换器的配置信息和光电转换器接 入事件上报给准入核查器。
38、所述准入核查器接收所述控制器上报的光电转换器的配置信息; 并根据所述光电转换器的配置信息, 确定是否允许所述光电转换器接入。 具体地, 准入核查器将获取的所述光电转换器的配置信息与自身的策略 信息进行比较, 所述策略信息包括可准入的厂家、 型号、 支持速率等, 检测获取的光电转换器的配置信息是否符合自身的策略信息。 若符合, 则允许光电转换器接入, 若不符合, 则告警, 提示更换光电转换器。
39、 准入核查器在允许所述光电转换器接入时, 将允许所述光电转 换器接入的核查结果告知控制器。
40、 控制器在确定有光电转换器接入, 且获知准入核查器允许所述 光电转换器接入时, 将光电转换器的复位信号置为无效, 并开启需要进 行光通信的 PCIE端口。 其中, 将光电转换器的复位信号置为无效具体可 为解除复位信号的有效状态。 例如, 若复位信号低电平有效, 则解除复 位信号的有效状态的方式可以为将复位信号置为高电平; 若复位信号高 电平有效, 则解除复位信号的有效状态的方式可以为将复位信号置为低 电平。
需要说明的是, 本实施例中的步骤 (6 ) 至 (9 ) 为可选步骤, 在不 需要设定准入策略的情况下, 步骤 (6 ) 至 (9 ) 可以直接被略过。
同时需要说明的是, 在不需要设定准入策略的情况下, 步骤 ( 10 ) 可以变为, 所述控制器若确定有光电转换器接入, 将光电转换器的复位 信号置为无效, 并开启需要进行光通信的 PCIE端口。
41、所述控制器通过所述需要进行光通信的 PCIE端口向对端设备发 送握手信令, 以进行连接尝试。 所述控制器在没有接收到对端设备的响 应信令时, 重复发送握手信令; 所述控制器在接收到对端设备的响应信 令后, 即可继续完成与所述对端设备建立链路连接的后续过程。
42、 所述控制器按照 PCIE协议与所述对端设备建立链路连接。
43、 所述控制器在链路连接建立后, 向所述光电转换器发送 PCIE 电信号。
可选地, 在所述控制器和所述光电转换器之间设置均衡器。 均衡器 具备放大接收到的 PCIE电信号的幅度, 还原衰减后的失真波形、 动态调 整 PCIE电信号的判决门限等功能。可根据系统实际设计的需求选择是否 添加该模块、 是否选择全部或部分实现该模块功能。
若在所述控制器和所述光电转换器之间设置均衡器, 所述控制器发 出的 PCIE 电信号会先到达所述均衡器。 所述均衡器接收控制器发送的 PCIE电信号, 并在所接收的 PCIE电信号存在失真时, 将失真的 PCIE电 信号恢复为光电转换器可以识别的 PCIE 电信号, 进而发送给光电转换 器。
44、 所述光电转换器接收 PCIE电信号, 将所接收的 PCIE电信号转 换为 PCIE光信号, 并通过光纤向所述对端设备发送所述 PCIE光信号。
45、 所述光电转换器接收对端设备发送的 PCIE光信号, 将 PCIE光 信号转换为 PCIE电信号, 并向内部的控制器发送所述 PCIE电信号。
可选地, 可在本端设备的控制器与光电转换器之间设置驱动器。 若 驱动器存在, 光电转换器发送给控制器的电信号会首先到达驱动器, 再 由驱动器发送给控制器; 而在驱动器不存在时, 光电转换器直接将电信 号发送给控制器。所述驱动器的主要功能包括整体性调整 PCIE电信号的 发送幅度、 选择性调整部分信号的发送幅度等。 可根据系统实际设计的 需求选择是否添加该模块、 是否选择全部或部分实现该模块功能。
驱动器接收到光电转换器发送的 PCIE电信号后, 增加 PCIE电信号 的抗衰减能力、 减少信号传输损耗影响, 使控制器能够接收到可正常识 别的 PCIE电信号, 进而发送给内部的控制器。
46、 所述控制器接收所述 PCIE电信号。 经过以上步骤后, 即可完成 PCIE信号的整个传输过程。后续信号传 输依此重复进行。 特别需要说明的是, 在本发明实施例中, 根据实际需求, 可以不设 置均衡器和 /或驱动器, 也可以设置均衡器和 /或驱动器。 在设置均衡器和 /或驱动器时, 均衡器和 /或驱动器既可以作为单独的单元设置在网络设备 内部, 也可以集成在光电转换器上。 当然, 在同时设置了均衡器和驱动 器时, 还可以将任一者设置在网络设备内部, 另一者集成在光电转换器 上。 在此, 只是以举例方式进行说明, 本发明并不对均衡器和 /或驱动器 的设置进行任何具体限定。
本实施例提供的 PCIE信号的传输方法, 通过将 PCIE电信号转换为 PCIE光信号, 进而通过 PCIE光信号在不同的设备之间进行传输, 不仅 能够提升传输效率、 可靠性, 节省设计成本, 而且还适合长距离传输。 值得注意的是, 上述用 PCIE信号的传输设备实施例中, 所包括的各 个器件只是按照功能逻辑进行划分的, 但并不局限于上述的划分, 只要 能够实现相应的功能即可; 另外, 各功能器件的具体名称也只是为了便 于相互区分, 并不用于限制本发明的保护范围。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分 步骤是可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一 种计算机可读存储介质中, 所述存储介质可以是只读存储器、 磁盘或光 盘等。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不 局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本 发明的保护范围应以权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种高速周边组件互连 PCIE信号的传输方法, 其特征在于, 所 述方法包括:
生成需要发送给对端设备的 PCIE电信号,所述对端设备为生成所述 PCIE电信号之外的设备;
将所述生成的 PCIE电信号转换为 PCIE光信号;
向所述对端设备发送所述 PCIE光信号。
2、 根据权利要求 1所述的方法, 其特征在于, 在所述生成需要发送 给对端设备的 PCIE电信号之后, 且在所述将所述生成的 PCIE电信号转 换为 PCIE光信号之前, 所述方法还包括:
确定所述生成的 PCIE电信号是否存在失真;
如果确定所述生成的 PCIE电信号存在失真, 将所述失真的 PCIE电 信号恢复为无失真的 PCIE电信号;
所述将所述生成的 PCIE电信号转换为 PCIE光信号包括:
将所述恢复为无失真的 PCIE电信号转换为 PCIE光信号。
3、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 接收所述对端设备发送的 PCIE光信号;
将所述接收的 PCIE光信号转换为 PCIE电信号。
4、 根据权利要求 3所述的方法, 其特征在于, 在所述将所述接收的 PCIE光信号转换为 PCIE电信号之后, 所述方法还包括:
对所述转换后的 PCIE电信号进行抗衰减处理, 以使所述 PCIE电信 号的抗衰减能力增加。
5、 根据权利要求 1至 4任一项所述的方法, 其特征在于, 在所述向 所述对端设备发送所述 PCIE光信号之前, 所述方法还包括:
与所述对端设备建立光传输链路连接;
所述向所述对端设备发送所述 PCIE光信号具体为:通过所述建立的 光传输链路连接向所述对端设备发送所述 PCIE光信号。
6、 根据权利要求 5所述的方法, 其特征在于, 所述与所述对端设备 建立光传输链路连接包括:
向所述对端设备发送握手信令, 以进行连接尝试;
若接收到所述对端设备的响应信令, 与所述对端设备建立光传输链 路连接; 若未接收到所述对端设备的响应信令, 则向所述对端设备重复发送 握手信令, 直到与所述对端设备建立光传输链路连接。
7、 根据权利要求 5所述的方法, 其特征在于, 在所述与对端设备建 立光传输链路连接之后, 所述方法还包括:
检测所述建立的光传输链路连接是否异常;
如果检测到所述光传输链路连接异常, 则进行如下处理:
停止使用异常的所述光传输链路连接传输所述 PCIE光信号; 或者
与所述对端设备重新建立光传输链路连接, 以使用所述重新建立的 光传输链路连接传输所述 PCIE光信号;
所述通过所述建立的光传输链路连接向所述对端设备发送所述 PCIE光信号包括:
如果检测到所述光传输链路连接正常, 通过所述建立的光传输链路 连接向所述对端设备发送所述 PCIE光信号。
8、 一种高速周边组件互连 PCIE信号的传输设备, 其特征在于, 所 述设备包括:
控制器, 用于生成需要发送给对端设备的 PCIE电信号, 所述对端设 备为生成所述 PCIE电信号之外的设备;
光电转换器, 用于将所述控制器生成的 PCIE电信号转换为 PCIE光 信号; 并向所述对端设备发送所述 PCIE光信号。
9、 根据权利要求 8所述的设备, 其特征在于, 所述设备还包括: 均衡器,用于在所述控制器生成需要发送给对端设备的 PCIE电信号 之后,且在所述光电转换器将所述控制器生成的 PCIE电信号转换为 PCIE 光信号之前, 确定所述控制器生成的 PCIE电信号是否存在失真; 如果确 定所述生成的 PCIE电信号存在失真, 将所述失真的 PCIE电信号恢复为 无失真的 PCIE电信号;
所述光电转换器具体用于:
将所述均衡器恢复为无失真的 PCIE电信号转换为 PCIE光信号。
10、 根据权利要求 8所述的设备, 其特征在于, 所述光电转换器还 用于:
接收所述对端设备发送的 PCIE光信号; 将所述接收的 PCIE光信号转换为 PCIE电信号。
11、 根据权利要求 10所述的设备, 其特征在于, 所述设备还包括: 驱动器, 用于在所述光电转换器将所述接收的 PCIE 光信号转换为
PCIE 电信号之后, 对经所述光电转换器转换后的 PCIE 电信号进行抗衰 减处理, 以使所述 PCIE电信号的抗衰减能力增加。
12、 根据权利要求 8至 11任一项所述的设备, 其特征在于, 所述控 制器还用于: 在所述光电转换器向所述对端设备发送所述 PCIE光信号之 前, 与所述对端设备建立光传输链路连接;
所述光电转换器具体用于: 通过所述建立的光传输链路连接向所述 对端设备发送所述 PCIE光信号。
13、 根据权利要求 12所述的设备, 其特征在于, 所述控制器具体用 于:
向所述对端设备发送握手信令, 以进行连接尝试;
若接收到所述对端设备的响应信令, 与所述对端设备建立光传输链 路连接;
若未接收到所述对端设备的响应信令, 则向所述对端设备重复发送 握手信令, 直到与所述对端设备建立光传输链路连接。
14、 根据权利要求 12所述的设备, 其特征在于, 所述控制器在与所 述对端设备建立光传输链路连接之后, 还用于:
检测所述建立的光传输链路连接是否异常;
如果检测到所述光传输链路连接异常, 则进行如下处理:
停止使用异常的所述光传输链路连接传输所述 PCIE光信号; 或者
与所述对端设备重新建立光传输链路连接, 以使用所述重新建立的 光传输链路连接传输所述 PCIE光信号;
所述光电转换器具体用于: 如果所述控制器检测到所述光传输链路 连接正常, 通过所述控制器建立的光传输链路连接向所述对端设备发送 所述 PCIE光信号。
15、 根据权利要求 8所述的设备, 其特征在于, 所述控制器还用于: 在所述光电转换器将所述控制器生成的 PCIE电信号转换为 PCIE光 信号之前, 确定是否有光电转换器接入; 若确定有光电转换器接入, 则 启用所述光电转换器。
16、 根据权利要求 15所述的设备, 其特征在于, 所述控制器和所述 光电转换器通过控制信号线而连接, 所述控制信号线用于向所述控制器 传输所述光电转换器的配置信息;
所述控制器, 还用于接收所述控制信号线传输的所述光电转换器的 配置信息, 并将所述光电转换器的配置信息发送给准入核查器;
所述设备还包括:
准入核查器, 用于根据所述控制器发送的所述光电转换器的配置信 息, 确定是否允许所述光电转换器接入到所述控制器, 并将是否允许所 述光电转换器接入到所述控制器的核查结果告知所述控制器;
所述控制器具体用于: 若确定有光电转换器接入, 且所述准入核查 器的核查结果为允许所述光电转换器接入, 则启用所述光电转换器。
17、 根据权利要求 15或 16所述的设备, 其特征在于, 所述控制信 号线用于向所述控制器传输用来确定光电转换器是否接入的在位侦测信 号;
所述控制器具体用于:
接收所述控制信号线传输的在位侦测信号;
确定所述在位侦测信号的电平是否发生反转;
若发生反转, 则确定有光电转换器接入;
若未发生反转, 则确定没有光电转换器接入。
18、 根据权利要求 14所述的设备, 其特征在于, 所述控制器和所述 光电转换器上设置 PCIE端口, 所述控制器和所述光电转换器通过控制信 号线而连接到各自的 PCIE端口上, 所述控制信号线用于若所述光传输链 路连接异常, 则向所述控制器传输用来确定光电转换器是否接入的在位 侦测信号;
所述控制器具体用于:
接收所述控制信号线传输的在位侦测信号;
确定所述在位侦测信号的电平是否发生反转;
若发生反转, 则关闭异常的所述光传输链路连接所对应的 PCIE 端 口; 若未发生反转, 则重启异常的所述光传输链路连接所对应的 PCIE端 口, 并通过所述重启的 PCIE端口发送握手信令以与所述对端设备重新建 立光传输链路连接。
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