TWI539764B - Optical transceiver module, optical transmission device and optical transmission method - Google Patents

Description

Optical transceiver module, optical transmission device and optical transmission method

The present invention relates to an optical transmission device, and more particularly to an optical transmission device applied to a universal serial bus bar.

With the development of optical transmission technology, optical fiber transmission has considerable advantages in transmission rate, transmission distance and anti-interference ability, so optical transmission devices have been more and more widely used. Due to the advantages of optical transmission technology, more and more applications are expected to connect hosts and devices to optical transmission devices, making traditional interface specifications such as Peripheral Component Interconnect Express (Peripheral Component Interconnect Express). Hosts and devices such as PCIE) interface specifications or Universal Serial Bus (USB) version 3.0 interface specifications can also be used for optical fiber communication via optical transmission devices. In an optical transmission device, an active optical cable (AOC) includes two electrical-to-optical/optical-to-electrical (EO/OE) processes at the host end and the device end, respectively. The chip, through the active fiber-optic cable, allows the host and the device to communicate with the fiber without replacing the hardware. Despite this, there are still many problems with prior art active fiber optic cables. Take the host and device supporting the USB standard as an example. When the host is connected to the active optical fiber cable of the prior art, the device is not active with the prior art. When the fiber optic cable is connected, since the active fiber optic cable is already connected to the host, the host will consider that the device is inserted and sends out a link training sequence to establish a connection with the device. However, because the device is not actually connected to the active fiber optic cable, it cannot respond to this link training sequence. Therefore, the host does not receive any response, and as a result, the host enters the failure mode. In order to release the failure mode, the user usually has to perform complicated settings or restart the host program, which causes inconvenience to the user. Moreover, even when the host and the device are successfully connected through the active fiber optic cable, when one of them is disconnected from the active fiber optic cable, the other may not be able to detect the disengagement event, and the state machine (state machine) ) may operate in an inappropriate state. Therefore, the present invention proposes a new active optical fiber cable and optical transmission method to solve the problems existing in the prior art.

An embodiment of the present invention provides an optical transceiver module coupled to a device, including: an electronic signal transmitting end coupled to a receiving end of the device; and an electronic signal receiving end coupled to the device a transmitting end; an optical signal receiving end coupled to the electronic signal transmitting end; and an optical signal transmitting end coupled to the electronic signal receiving end, when the optical transceiver module is in a normal operating state, the optical signal is transmitted Transmitting an optical signal; wherein, when in the normal operating state and the electronic signal receiving end does not receive any electronic signal for more than a first predetermined time, the optical transceiver module enters an idle detection state, so that the electronic signal is transmitted The device performs a receiving terminal detection on the device to determine whether the device is coupled to the optical transceiver module. The optical signal transmitting end continuously transmits the optical signal when in the idle detection state.

Another embodiment of the present invention provides an optical transmission device coupled to Between a host and a device, comprising: a first optical fiber; a second optical fiber; a host optical transceiver module, comprising: a host-side electronic signal transmitting end coupled to a receiving end of the host; The end of the electronic signal receiving end is coupled to a transmitting end of the host; a host end optical signal transmitting end is coupled between a first end of the first optical fiber and the electronic signal receiving end of the host end; and a host The optical signal receiving end is coupled between a third end of the second optical fiber and the electronic signal transmitting end of the host end; and a device end optical transceiver module includes: a device end electronic signal transmitting end coupled a receiving end of the device; a device-side electronic signal receiving end coupled to a transmitting end of the device; a device-side optical signal receiving end coupled to a second end of the first optical fiber and the device end Between the electronic signal transmitting end and the device optical signal transmitting end, coupled between a fourth end of the second optical fiber and the electronic signal receiving end of the device, when the optical transceiver module of the device is in a normal state Operating state The optical signal transmitting end of the device transmits an optical signal to the optical signal receiving end of the host through the second optical fiber; and the electronic signal receiving end of the device does not receive the first predetermined time when the electronic signal receiving end is in the normal operating state; Any electronic signal, the optical transceiver module of the device enters an idle detection state of the device, so that the electronic signal transmitting end of the device performs a receiving terminal detection on the device to determine whether the device is coupled to the optical transceiver of the device. The module is in the idle detection state, and the optical signal transmitting end of the device end continuously transmits the optical signal.

A further embodiment of the present invention provides an optical transmission device, which is adapted to be coupled to an optical transmission device between a host and a device. The optical transmission device includes a first optical fiber, a second optical fiber, and a host optical transceiver. The device and the device-side optical transceiver device, wherein the host-side optical transceiver device comprises: coupled to the host a host-side electronic signal transmitting end of a receiving end, a host-side electronic signal receiving end coupled to a transmitting end of the host, a first end coupled to the first optical fiber, and an electronic signal receiving end of the host end a host-side optical signal transmitting end and a host-side optical signal receiving end coupled between the third end of the second optical fiber and the host-side electronic signal transmitting end; wherein the device-side optical transceiver module includes a device-side electronic signal transmitting end coupled to a receiving end of the device, a device-side electronic signal receiving end coupled to a transmitting end of the device, a fourth end coupled to the second optical fiber, and the device a device-side optical signal transmitting end between the receiving end of the electronic signal and a device-side optical signal receiving end coupled between the second end of the first optical fiber and the electronic signal transmitting end of the device; wherein the light The transmission method includes: when the optical transceiver module of the device is in a normal operation state, the optical signal transmitting end of the device transmits an optical signal to the optical signal receiving end of the host through the second optical fiber. And when the device is in the normal operating state and the electronic signal transmitting end of the device does not receive any electronic signal for more than a first predetermined time, the device optical transceiver module enters a device-side idle detection state, so that the device-side electronic device The signal transmitting end performs a receiving terminal detection on the device to determine whether the device is coupled to the device end optical transceiver module; wherein, when in the idle detection state, the device end optical signal transmitting end continuously transmits the light Signal.

1‧‧‧Optical transmission system

10‧‧‧Host

20‧‧‧ Equipment

30‧‧‧Optical transmission device

310, 320‧‧‧ optical transceiver module

331, 332‧‧‧ fiber

341, 342‧‧‧ Optical signal detection unit

ETx1, ETx2‧‧‧ electronic signal transmitter

ERx1, ERx2‧‧‧ electronic signal receiving end

LOS1, LOS2‧‧‧ Optical signal receiving end detection signal

ORx1, ORx2‧‧‧ Optical signal receiving end

OTx1, OTx2‧‧‧ optical signal transmission end

RxD, RxH‧‧‧ Receiver

S0‧‧‧Detective status

S1‧‧‧Detection stop status

S2‧‧‧Light drive status

S3‧‧‧ Idle detection status

SW1, SW21, SW22‧‧‧ switch

T _IDLE ‧‧‧Inactive time

T _S ‧‧‧Overtime

TxD, TxH‧‧‧ transmitter

VBUS‧‧‧ busbar power supply

Vbus2, VbusD‧‧‧ power terminal

Z1, Z2‧‧‧ terminal impedance

Figure 1 is a schematic illustration of an optical transmission system in accordance with an embodiment of the present invention.

2 is a schematic diagram of a state machine of a device-side optical transceiver module according to an embodiment of the invention.

FIG. 3 is a schematic diagram of a host-side optical transceiver module according to an embodiment of the invention.

FIG. 4 is a schematic diagram of a device-side optical transceiver module according to an embodiment of the invention.

The following description is an embodiment of the present invention. The intent is to exemplify the general principles of the invention and should not be construed as limiting the scope of the invention, which is defined by the scope of the claims.

It is noted that the following disclosure may provide embodiments or examples for practicing various features of the present invention. The specific elements and arrangements of the elements described below are merely illustrative of the spirit of the invention and are not intended to limit the scope of the invention. In addition, the following description may reuse the same component symbols or characters in various examples. However, the re-use is for the purpose of providing a simplified and clear description, and is not intended to limit the relationship between the various embodiments and/or configurations discussed below. In addition, the description of one of the features described in the following description is connected to, coupled to, and/or formed on another feature, etc., and may include a plurality of different embodiments, including direct contact of the features, or other additional Features are formed between the features and the like such that the features are not in direct contact.

Figure 1 is a schematic illustration of an optical transmission system 1 in accordance with an embodiment of the present invention. The optical transmission system includes a host 10, a device 20, and an optical transmission device 30 connected between the host 10 and the device 20. The host 10 can be a Fast Peripheral Component Interconnect Standard (PCIE) interface specification or a universal serial bus version 3.0 (USB 3.0) or higher interface specification, and supports hot plug function. The high-speed electronic transceiver device includes a transmitting terminal TxH and a receiving terminal RxH. The device 20 may be a high-speed link device supporting a hot plug function, such as a PCIE interface specification or a USB 3.0 or higher interface specification, and includes a transmitter TxD and a receiver RxD. Hereinafter, the present invention will be described by taking the host 10 and the device 20 supporting USB 3.0 or above interface specifications as an example.

The optical transmission device 30 includes an optical transceiver module 310 coupled to the host 10, an optical transceiver module 320 coupled to the device 20, and optical fibers 331 and 332. The optical fibers 331 and 332 are coupled between the optical transceiver modules 310 and 320. The optical transceiver module 310 includes an electronic signal transmitting end ETx1, an electronic signal receiving end ERx1, an optical signal transmitting end OTx1, and an optical signal receiving end ORx1, and the optical transceiver module 320 includes an electronic signal transmitting end ETx2, an electronic signal receiving end ERx2, and an optical signal receiving end ERx2. The signal transmitting end OTx2 and the optical signal receiving end ORx2. The electronic signal receiving end ERx1 is coupled to the transmitting end TxH of the host 10 via a cable to receive the electronic signal transmitted by the host 10. The optical signal transmitting end OTx1 is coupled to the optical signal receiving end ORx2 of the optical transceiver module 320 through the optical fiber 331, and transmits the optical signal obtained by the electro-optical conversion of the electronic signal received by the electronic signal receiving end ERx1 to the optical signal through the optical fiber 331. Receiver ORx2. The electronic signal transmitting end ETx2 is coupled to the receiving end RxD of the device 20 via a cable, and transmits the electronic signal obtained by photoelectrically converting the optical signal received by the optical receiving end ORx2 to the receiving end RxD through the cable. The electronic signal receiving end ERx2 is coupled to the transmitting end TxD of the device 20 via a cable to receive the electronic signal transmitted by the device 20. The optical signal transmitting end OTx2 is coupled to the optical signal receiving end ORx1 of the optical transceiver module 310 through the optical fiber 332, and transmits the optical signal obtained by the electro-optical conversion of the electronic signal received by the electronic signal receiving end ERx2 to the optical signal through the optical fiber 332. Receiver ORx1. Electronic signal transmission terminal ETx1 through cable It is coupled to the receiving end RxH of the host 10, and transmits the electronic signal obtained by photoelectrically converting the optical signal received by the optical signal receiving end ORx1 to the receiving end RxH through the cable.

FIG. 2 is a schematic diagram of a state machine (not shown) of the device-side optical transceiver module (ie, the optical transceiver module 320 of FIG. 1) according to an embodiment of the invention. The state machine of the optical transceiver module 320 includes four states S0, S1, S2, and S3. In general, the optical transceiver module 320 is self-powered, such as powered by an external adaptor. When the optical transceiver module 320 is powered on, the state machine of the optical transceiver module 320 is preset in the detection active state S0. In the detection of the active state S0, the electronic signal transmitting end ETx2 of the optical transceiver module 320 performs a receiver termination detection to determine whether the device 20 is connected to the optical transceiver module 320. In addition, in the detection of the active state S0, the optical signal transmitting end OTx2 of the optical transceiver module 320 does not drive the optical signal, that is, does not transmit any optical signal. Here, the device-side receiving terminal detects that a periodic polling can be inserted by an electronic device (for example, the device 20 described above). In an embodiment, whether the device 20 is connected to the optical transceiver module 320 is determined according to whether the electronic signal transmitting terminal ETx2 can detect a load. The above load may be the receiving terminal impedance of the receiving end RxD (for example, the impedance RRX-DC defined in Table 6-13 of the USB 3.0 specification 1.0 revision). When the electronic signal transmitting end ETx2 detects that the receiving terminal impedance of the receiving end RxD of the device 20 is not detected through the device receiving terminal (ie, the device receiving terminal detects the failure), it is determined that the device 20 is not connected to the optical transceiver module. Group 320. At this time, the optical transceiver module 320 enters the detection stop state S1. On the other hand, when the electronic signal transmitting terminal ETx2 detects the receiving of the receiving terminal RxD of the device 20 through the device receiving terminal When the terminal impedance (that is, the device end receiving terminal detects success), the determining device 20 is connected to the optical transceiver module 320. At this time, the optical transceiver module 320 enters the light driving state S2.

In the detection stop state S1, the electronic signal transmitting end ETx2 of the optical transceiver module 320 stops performing the device-side receiving terminal detection, and the optical signal transmitting end OTx2 does not drive the optical signal, that is, does not transmit any optical signal. When the optical transceiver module 320 enters the detection stop state S1, a timer is started. If the optical transceiver module enters the detection stop state S1 for a predetermined time T _S (for example, 12 ms), the optical transceiver transmits and receives Module 320 returns to detect active state S0.

The optical driving state S2 is equivalent to the normal operating state, and in the normal operating state, the optical transceiver module 320 can normally receive and transmit signals between the device 20 and the optical transceiver module 310. In the optical driving state S2, the electronic signal receiving end ERx2 can receive the electrical signal of the transmitting end TxD of the device, and the optical signal transmitting end OTx2 can transmit the optical signal obtained by electro-optical conversion of the received electronic signal to the light through the optical fiber 332. The optical signal receiving end ORx1 of the transceiver module 310. In addition, in the optical driving state S2, the optical signal receiving end ORx2 can receive the optical signal from the optical signal transmitting end OTx1 through the optical fiber 331, and the electronic signal transmitting end ETx2 can receive the optical signal received by the optical signal receiving end ORx2. The photoelectrically converted electronic signal is transmitted to the receiving end RxD of the device 20. In particular, in the optical driving state S2, the electronic signal receiving terminal ERx2 monitors the reception of the electronic signal from the device 20. If the electronic signal receiving end ERx2 does not receive any electronic signal for more than one idle time T _IDLE (for example, 300ms, 400ms or 500ms), the optical transceiver module 320 enters the idle detecting state S3.

In the idle detection state S3, the electronic signal transmitting end ETx2 performs the above-mentioned device-side receiving terminal detection to determine whether the device 20 is connected to the optical transceiver module. Group 320. It should be particularly noted that when the electronic signal receiving end ERx2 does not receive any electrical signal from the transmitting end of the device 20 in the idle detecting state S3, the optical signal transmitting end OTx2 continues to transmit the optical signal. When the device-side receiving terminal detects that the device 20 is not coupled to the optical transceiver module 320 (ie, the device-side receiving terminal fails to detect), that is, when the device 20 detaches the optical transceiver module 320, the optical transceiver module 320 enters. The stop state S1 is detected. On the other hand, when the device-side receiving terminal detecting and determining device 20 is coupled to the optical transceiver module 320 (that is, the device-side receiving terminal detects successfully), that is, when the device 20 is also connected to the optical transceiver module 320, the optical transceiver module 320 returns to the light drive state S2.

In summary, for the state S0~S4 of the optical transceiver module 320, when the optical transceiver module 320 is in the optical driving state S2 or the idle detecting state S3, the optical signal transmitting terminal OTx2 transmits the optical signal, and when When the optical transceiver module 320 is in the detection active state S0 or the detection stop state S1, the optical signal transmitting terminal OTx2 does not transmit the optical signal. In addition, when the optical transceiver module 320 is powered on, the optical transceiver module 320 is set in the detection active state S0, and performs receiving terminal detection to determine whether the device 20 is coupled to the optical transceiver module 320. When the determining device 20 is coupled to the optical transceiver module 320, the optical transceiver module 320 enters the optical driving state S2. Otherwise, the optical transceiver module 320 switches between the detection active state S0 and the detection stop state S1. As described above, when in the optical driving state S2, the optical transceiver module 320 transmits an optical signal. When detecting the active state S0 or detecting the stop state S1, the optical transceiver module 320 does not transmit the optical signal. That is to say, when the power of the optical transceiver module 320 is activated, it is not preset to the state in which the optical signal can be transmitted. Then, when the determining device 20 is coupled to the optical transceiver module 320, the optical signal is transmitted to notify the host 10 that the device has been connected through the optical transceiver module 310, so that the host 10 performs a subsequent connection establishment procedure. Thereby, the optical transceiver module 320 of the present invention can solve one of the problems of the prior art. In addition, after the device 20 is disconnected from the optical transmission device 10 for a period of time (such as the idle time T _IDLE ), the optical transceiver module 320 enters the idle detection state S3 from the optical driving state S2, and then performs receiving terminal detection to determine the device. 20 is coupled to the optical transceiver module 320. When the judging device 20 is coupled to the optical transceiver module 320, the optical transceiver module 320 returns to the optical driving state S2. Otherwise, the optical transceiver module 320 enters the detection stop state S1. When the optical transceiver module 320 enters the detection stop state S1, the optical signal is not transmitted, and the optical transceiver module 310 is informed of the information that the device has been detached. Thereby, the hot plugging function of the optical transceiver module 320 can be achieved.

The hot plug function of the optical transceiver module 310 will be described below. Refer to the schematic diagram of the optical transceiver module 310 shown in FIG. The optical transceiver module 310 includes an optical signal detecting unit 341, a switch SW1, and an impedance Z1. The impedance Z1 is coupled between the switch SW1 and a ground. The switch SW1 is coupled between the impedance Z1 and the electronic signal receiving end ERx1. When the optical signal receiving end ORx1 of the optical transceiver module 310 receives the optical signal transmitted by the optical signal transmitting end OTx2 through the optical fiber 332, the optical signal detecting unit 310 is coupled to the optical signal detecting unit ORx1. The output signal receiving signal LOS1 of the output signal turns on the switch SW1 to couple the electronic signal receiving end ERx1 of the optical transceiver module 310 to the impedance Z1, so that the transmitting end TxH of the host 10 can detect when performing receiving terminal detection. The impedance Z1 is reached, and it follows that the device 20 has been connected to the optical transmission device 30. On the other hand, when the optical signal receiving end ORx1 does not receive any optical signal, the optical signal detecting unit 341 of the optical transceiver module 310 coupled to the optical signal receiving end ORx1 outputs the optical signal receiving end detecting signal. LOS1 will turn off the switch SW1 so that the electronic signal receiving end ERx1 of the optical transceiver module 310 is not coupled to the impedance Z1, and thus the transmission of the host 10 When the terminal TxH performs the receiving terminal detection, the impedance Z1 is not detected, and the host 10 can know that the device 20 has left the optical transmission device 30. According to the above embodiments, hot plugging of the device 20 coupled to the optical transceiver module 310 of the optical transmission device 30 can be achieved.

Regarding the idle time T _IDLE , four operational link states U0, U1, U2, and U3 are defined according to the USB 3.0 specification. The state U0 is a state in which the super high speed link is valid, and in the state U0, the device periodically transmits a signal. The states U1, U2, and U3 are in a power saving state. In the state U1, the device needs to transmit a signal every time a predetermined time (for example, 300 ms), and in the states U2 and U3, the device does not transmit a signal. Therefore, the idle time T _IDLE can be defined according to the operational behavior of the device in the states U0, U1, U2, and U3. For example, when the state U1 is reached, the device needs to transmit a signal to the host end every 300 ms. Therefore, the above idle time T _IDLE can be defined as 300 ms, 400 ms or 500 ms of not less than 300 ms. When the electronic signal receiving end ERx2 exceeds an idle time T _{IDLE does} not receive any electronic signal, the optical transceiver module 320 enters the idle detecting state S3, and in the idle detecting state S3, the electronic signal transmitting end ETx2 executes the device end. Receiving terminal detection, by performing the device-side receiving terminal detection in the idle detecting state S3 instead of the optical driving state S2, the device-side receiving terminal can be prevented from detecting the interrupted transmission path. It is important to note that the USB 3.0 specification defines that the device has different operating modes (such as the above-mentioned periodic transmission signals or no transmission signals) in U0, U1, U2 and U3. Therefore, the present invention accordingly defines the state of the apparatus (as shown in FIG. 2) for the state machine of the device-side optical transceiver, whereby the optical transmission device of the present invention can conform to the requirements of the USB 3.0 specification and the optical transmission device Support hot swap function.

The host-side optical transceiver module, that is, the optical transceiver module 310, is generally powered by the host 10. When the optical transceiver module 310 receives power supply from the host 10, it is powered When the source is activated, the electronic signal transmitting end ETx1 of the optical transceiver module 310 performs host terminal receiving terminal detection to detect whether the host 10 is connected to the optical transceiver module 310. In this embodiment, since the optical transceiver module 310 is powered by the host 10, once the optical transceiver module 310 loses power supply, the host 10 is disconnected from the optical transmission device 30, so the electronic signal transmitting terminal ETx1 only needs to be in the optical transceiver module. When the power is turned on, the host side receives the terminal detection. Similar to the optical transceiver module 320, if the host terminal receiving terminal detects successfully, the optical transceiver module 310 enters a normal operating state, and the optical signal transmitting terminal OTx1 transmits the electronic signal received by the electronic signal receiving terminal ERx1 through the optical fiber 331 through electro-optical conversion. The optical signal is transmitted to the optical signal receiving end ORx2 of the optical transceiver module 320. In addition, in the normal operating state, the electronic signal transmitting end ETx1 can transmit the electronic signal obtained by photoelectrically converting the optical signal received by the optical signal receiving end ORx1 to the receiving end RxH of the host 10 through the cable.

It should be noted that for device 20, device 20 may be powered by an external power source or/and a busbar power supply end of a USB connector. A device powered by an external power source is also referred to as a self-powered device, and a device powered by a bus terminal of the connector is also referred to as a bus power supply (Vbus power) device. In an embodiment, the self-powered device must enter the powered state after the device is connected to the optical transmission device and is supplied to the device through the bus power supply VBUS provided by the optical transceiver module 320. The optical transceiver module 320 further includes an optical signal detecting unit 342 coupled to the optical signal receiving end ORx2, an impedance Z2, and switches SW21 and SW22, as shown in the schematic diagram of the optical transceiver module 320 shown in FIG. The impedance Z2 is coupled between the switch SW21 and a ground. The switch SW21 is coupled between the impedance Z2 and the electronic signal receiving end ERx2, and is received by the optical signal detecting unit 342. No. Receiver detection signal LOS2 control. The switch SW22 is coupled between the external bus power supply VBUS and the power terminal Vbus2 of the USB connector of the optical transceiver module 320, and the power terminal Vbus2 of the USB connector is coupled to the power terminal VbusD of the device 20 through a cable.

When the optical signal receiving end ORx2 of the optical transceiver module 320 receives the optical signal transmitted by the optical signal transmitting end OTx1 through the optical fiber 331, the optical signal receiving end detecting signal LOS2 outputted by the optical signal detecting unit 342 turns on the switch SW21. And the SW22, the electronic signal receiving end ERx2 is coupled to the impedance Z2, and the external bus power supply VBUS is supplied to the device 20. On the other hand, when the optical signal receiving end ORx2 does not receive any optical signal, the optical signal receiving end detecting signal LOS2 outputted by the optical signal detecting unit 342 will turn off the switches SW21 and SW22, so that the electronic signal receiving end ERx2 does not It will be coupled to the impedance Z2, and the external bus power supply VBUS will not be supplied to the device 20.

In summary, the device 20 can perform receiving terminal detection by the transmitting terminal TxD when it is wake-up to know whether the host 10 is connected to the optical transmission device 30 according to whether or not the impedance Z2 is detected. In the case that the other device 20 does not actively perform the receiving terminal detection, the device 20 can also know whether the host 10 is connected to the optical transmission device 30 according to whether the bus power supply VBUS is supplied to the device 20. Thereby, the device 20 can be more fully informed whether the host 10 is connected to the optical transmission device 30. According to the above embodiments, hot plugging of the host 10 coupled to the optical transmission device 30 can be achieved.

An optical transmission device is configured to be coupled to an optical transmission device between a host and a device. The optical transmission device includes a first optical fiber, a second optical fiber, and a host optical transceiver. Equipment end light collection Hair device. The host-side optical transceiver includes: a host-side electronic signal transmitting end coupled to a receiving end of the host, a host-side electronic signal receiving end coupled to a transmitting end of the host, and a first coupled to the first optical fiber A host-side optical signal transmitting end between the one end and the host-side electronic signal receiving end, and a host-side optical signal receiving end coupled between the third optical end of the second optical fiber and the host-side electronic signal transmitting end end. The device-side optical transceiver module includes: a device-side electronic signal transmitting end coupled to a receiving end of the device, a device-end electronic signal receiving end coupled to a transmitting end of the device, and a device coupled to the second optical fiber a device-side optical signal transmitting end between the fourth end and the device-side electronic signal receiving end, and a device-side optical signal coupled between the second end of the first optical fiber and the electronic signal transmitting end of the device end Receiving end. The optical transmission method includes: when the optical transceiver module of the device is in a normal operating state, the optical signal transmitting end of the device transmits an optical signal to the optical signal receiving end of the host through the second optical fiber; In the normal operating state, when the electronic signal receiving end of the device does not receive any electronic signal for more than a first predetermined time, the optical transceiver module of the device enters an idle detection state of the device, so that the electronic signal of the device is transmitted. The terminal performs a receiving terminal detection on the device to determine whether the device is coupled to the optical transceiver module of the device. When in the idle detection state, the device-side electronic signal transmitting end performs a device-side receiving terminal detection, and the device-side optical signal transmitting end continuously transmits the optical signal.

The optical transmission method further includes: when the device receiving terminal detects that the device is coupled to the optical transceiver module, the device optical transceiver module returns to the normal operation state, and when the device terminal receiving terminal detects the determination When the device is not coupled to the optical transceiver module, the optical transceiver module of the device enters a detection stop state. And when the detection is stopped, the device-side electronic signal transmitting end stops performing the device-side receiving terminal detection, and the optical signal transmitting end of the device stops transmitting the optical signal.

The optical transmission method further includes: when the power is supplied to the optical transceiver module of the device, the optical transceiver module of the device enters a detection effective state; and when the detection is valid, the electronic signal is transmitted by the device The device performs receiving end detection by the device to determine whether the device is coupled to the optical transceiver module of the device. The optical signal transmitting end of the device does not transmit the optical signal when the detecting active state is in the active state.

The optical transmission method further includes: when the detection is in an active state, and the receiving end of the device detects that the device is coupled to the optical transceiver module of the device, the optical transceiver module of the device enters the normal operation. And when the device receiving terminal detects that the device is not coupled to the device optical transceiver module, the device optical transceiver module enters a detection stop state.

The optical transmission method further includes: when the optical transceiver module of the device enters the detection stop state for a second predetermined time, the optical transceiver module of the device returns the detection active state.

The optical transmission method further includes: when the optical signal receiving end of the device does not receive any optical signal, the external bus power supply of the optical transceiver module of the device is not coupled to a power supply terminal of the device. .

The optical transmission method further includes: when the optical signal receiving end of the device receives any optical signal, coupling the electronic signal receiving end of the device end to a first impedance of the optical transceiver module of the device; and when the device Terminal optical signal reception When the terminal does not receive any optical signal, the device end electronic signal receiving end is not coupled to the first impedance.

The optical transmission method further includes: when the optical signal receiving end of the host end receives any optical signal, the electronic signal receiving end of the host end is coupled to a second impedance of the optical transceiver module of the host end; when the host end When the optical signal receiving end does not receive any optical signal, the host electronic signal receiving end is not coupled to the second impedance.

In the above optical transmission method, wherein the interface of the host is a USB version 3.0 or above, the device is a USB version 3.0 or higher.

In the present specification, although it is described that the host and the device support the USB version 3.0, those having ordinary knowledge in the art should be able to apply the optical transceiver module, the optical transmission device, and the optical transmission method of the present invention to the USB version according to the present specification. 3.1 or USB version 3 series of hosts and devices.

The method of the invention, or a particular type or portion thereof, may exist in the form of a code. The code may be included in non-transitory physical media such as floppy disks, optical disks, hard disks, or any other electronic device or machine readable (eg computer readable) storage medium, or is not limited to external forms. A computer program product, wherein when the code is loaded and executed by a machine, such as a computer, the machine becomes a device or system for participating in the present invention and the method steps of the present invention can be performed. The code can also be transmitted over some transmission medium, such as wire or cable, fiber optics, or any transmission type, where the machine becomes available when the code is received, loaded, and executed by an electronic device or machine, such as a computer. To participate in the system or device of the present invention. When working in a general purpose processing unit, the code combination The unit provides a unique device that operates similar to the application specific logic.

The above is an overview feature of the embodiment. Those having ordinary skill in the art should be able to use the present invention as a basis for design or adaptation to achieve the same objectives and/or achieve the same advantages of the embodiments described herein. It should be understood by those of ordinary skill in the art that the same configuration should not depart from the spirit and scope of the present invention, and various changes, substitutions and substitutions can be made without departing from the spirit and scope of the present invention. The illustrative methods are merely illustrative of the steps, but are not necessarily performed in the order presented. The steps may be additionally added, substituted, changed, and/or eliminated, as appropriate, and are consistent with the spirit and scope of the disclosed embodiments.

S0‧‧‧Detective status

S1‧‧‧Detection stop status

S2‧‧‧Light drive status

S3‧‧‧ Idle detection status

Claims (22)

An optical transceiver module is coupled to a device, comprising: an electronic signal transmitting end coupled to a receiving end of the device; an electronic signal receiving end coupled to a transmitting end of the device; The signal receiving end is coupled between another optical transmitting end of the other optical transceiver module and the electronic signal transmitting end; and an optical signal transmitting end coupled to the electronic signal receiving end, when the optical transceiver module is In a normal operating state, the optical signal transmitting end transmits an optical signal; wherein, when in the normal operating state and the electronic signal receiving end does not receive any electronic signal for more than a first predetermined time, the optical transceiver module enters a The idle detection state causes the electronic signal transmitting end to perform a receiving terminal detection on the device to determine whether the device is coupled to the optical transceiver module; wherein, when in the idle detection state, the optical signal transmitting end The optical signal is continuously transmitted to another optical receiving end of the other optical transceiver module. The optical transceiver module of claim 1, wherein when the receiving terminal detects that the device is coupled to the optical transceiver module, the optical transceiver module returns to the normal operating state, when the receiving terminal When detecting that the device is not coupled to the optical transceiver module, the optical transceiver module enters a detection stop state; when in the detection stop state, the electronic signal transmission terminal stops performing the detection of the receiving terminal. And the optical signal transmitting end stops transmitting the optical signal. The optical transceiver module of claim 2, wherein the optical transceiver module enters a detection active state when the optical transceiver module enters the detection stop state for a second predetermined time. The optical transceiver module according to claim 1, wherein the optical transceiver When the module power is turned on, the optical transceiver module enters a detection effective state, so that the electronic signal transmission end performs the detection of the receiving terminal to determine whether the device is coupled to the optical transceiver module, and is in the detection. In the active state, the optical signal transmitting end does not transmit the optical signal. The optical transceiver module of claim 4, wherein the optical transceiver module enters the normal state when the detection is in an active state, and the receiving terminal detects that the device is coupled to the optical transceiver module. An operation state; wherein when the detection is in an active state, and the receiving terminal detects that the device is not coupled to the optical transceiver module, the optical transceiver module enters a detection stop state, and when the detection is stopped In the state, the optical signal transmitting end does not transmit the optical signal. The optical transceiver module of claim 5, wherein the optical transceiver module returns the detection active state when the optical transceiver module enters the detection stop state for a second predetermined time. The optical transceiver module of claim 1, further comprising: a first switch coupled between an external power source and a bus power terminal of the device; wherein the optical signal receiving end is not received When the optical signal is received, the first switch does not couple the external power supply to the power supply terminal. When the optical signal receiving end receives any optical signal, the first switch couples the external power supply to the convergence. Discharge the power supply. The optical transceiver module of claim 1, further comprising: an impedance; and a second switch coupled between the electronic signal receiving end and the impedance; When the optical signal receiving end receives any optical signal, the second switch couples the electronic signal receiving end to the impedance, and when the optical signal receiving end does not receive any optical signal, the second switch does not The electronic signal receiving end is coupled to the impedance. An optical transmission device is coupled between a host and a device, and includes: a first optical fiber; a second optical fiber; and a host optical transceiver module, including: a host-side electronic signal transmitting end coupled to the optical transmission unit a receiving end of the host; a host-side electronic signal receiving end coupled to a transmitting end of the host; a host-side optical signal transmitting end coupled to a first end of the first optical fiber and the host-side electronic signal And a host-side optical signal receiving end coupled to a third end of the second optical fiber and the host-side electronic signal transmitting end; and a device-side optical transceiver module, including: a device The terminal electronic signal transmitting end is coupled to a receiving end of the device; a device end electronic signal receiving end is coupled to a transmitting end of the device; and a device end optical signal receiving end is coupled to the first optical fiber a second end and the electronic signal transmitting end of the device; and a device end optical signal transmitting end coupled between a fourth end of the second optical fiber and the electronic signal receiving end of the device, when the device Terminal optical transceiver When in a normal operation state, the device side transmitter transmits an optical signal to the optical signal receiving end of the host-side optical signal transmitted through the second optical fiber; wherein, when in the normal operation state and the electronic device side signal receiving end If no electronic signal is received for more than a first predetermined time, the optical transceiver module of the device enters an idle detection state of the device, so that the electronic signal transmitting end of the device performs a receiving terminal detection on the device to determine the Whether the device is coupled to the optical transceiver module of the device; wherein, when in the idle detection state, the optical signal transmitting end of the device continuously transmits the optical signal. The optical transmission device of claim 9, wherein when the device receiving terminal detects that the device is coupled to the optical transceiver module of the device, the optical transceiver module of the device returns to the normal operating state. When the device receiving terminal detects that the device is not coupled to the device optical transceiver module, the device optical transceiver module enters a detection stop state; when in the detection stop state, the device terminal electronic The signal transmitting end stops performing the detection of the receiving end of the device, and the optical signal transmitting end of the device stops transmitting the optical signal. The optical transmission device of claim 10, wherein when the power of the optical transceiver module of the device is activated, the optical transceiver module of the device enters a detection effective state; when the detection is valid, The device-side electronic signal transmitting end performs the device-side receiving terminal detection, and the device-side optical signal transmitting end stops transmitting the optical signal. The optical transmission device of claim 11, wherein when the device optical transceiver module enters the detection stop state for a second predetermined time, the device optical transceiver module enters the detection effective state. . The optical transmission device of claim 9, wherein when the power supply module of the device is activated, the optical transceiver module of the device enters a detection effective state, so that the electronic signal transmission end of the device performs The device receives The terminal detects whether the device is coupled to the optical transceiver module of the device, and when the detection is in an active state, the optical signal transmitting end of the device does not transmit the optical signal. The optical transmission device of claim 13, wherein the device is in the active state, and the device receiving terminal detects that the device is coupled to the optical transceiver module of the device, The transceiver module enters the normal operation state; wherein when the device is in the active detection state, and the device receiving terminal detects that the device is not coupled to the device optical transceiver module, the device optical transceiver module enters a The stop state is detected, and when the detection is stopped, the optical signal transmitting end of the device does not transmit the optical signal. The optical transmission device of claim 14, wherein when the device optical transceiver module enters the detection stop state for a second predetermined time, the device optical transceiver module returns the detection effective state. . The optical transmission device of claim 9, wherein the device optical transceiver module further comprises: a first switch coupled between an external power source and a bus power terminal of the device; When the optical signal receiving end of the device does not receive any optical signal, the first switch does not couple the external power supply to the power supply end of the bus. When the optical signal receiving end of the device receives any optical signal, the first A switch couples the external power source to the bus power terminal. The optical transmission device of claim 9, wherein the device optical transceiver module further comprises: an impedance; a second switch coupled between the electronic signal receiving end of the device and the impedance; wherein when the optical signal receiving end of the device receives any optical signal, the second switch couples the electronic signal receiving end of the device end Connected to the impedance, when the optical signal receiving end of the device does not receive any optical signal, the second switch does not couple the electronic signal receiving end of the device end to the impedance. An optical transmission method is applicable to an optical transmission device coupled between a host and a device, the optical transmission device comprising a first optical fiber, a second optical fiber, a host optical transceiver, and a device optical transceiver The device, wherein the host-side optical transceiver comprises: a host-side electronic signal transmitting end coupled to a receiving end of the host, and a host-side electronic signal receiving end coupled to a transmitting end of the host, coupled to the first a host-side optical signal transmitting end between a first end of the optical fiber and the host-side electronic signal receiving end, and a third end connected to the second optical fiber and the host-side electronic signal transmitting end The device-side optical transceiver module includes: a device-side electronic signal transmitting end coupled to a receiving end of the device, and a device-side electronic signal receiving end coupled to a transmitting end of the device a device-side optical signal transmitting end coupled between a fourth end of the second optical fiber and the device-side electronic signal receiving end, and a second end coupled to the first optical fiber and a device-side optical signal receiving end between the device-side electronic signal transmitting end; wherein the optical transmitting method comprises: when the device-side optical transceiver module is in a normal operating state, the optical signal transmitting end of the device transmits the first The second optical fiber transmits an optical signal to the optical signal receiving end of the host end; When the device is in the normal operating state and the electronic signal transmitting end of the device does not receive any electronic signal for more than a first predetermined time, the optical transceiver module of the device enters an idle detection state of the device, so that the electronic signal of the device is The transmitting end performs a receiving terminal detection on the device to determine whether the device is coupled to the optical transceiver module of the device; wherein, when in the idle detection state, the optical signal transmitting end of the device continuously transmits the optical signal . The optical transmission method of claim 18, further comprising: when the receiving end of the device detects that the device is coupled to the optical transceiver module of the device, the optical transceiver module of the device returns to the normal The operating state; and when the device receiving terminal detects that the device is not coupled to the device optical transceiver module, the device optical transceiver module enters a detection stop state; wherein, when the detection is stopped In the state, the electronic signal transmitting end of the device stops performing the detecting of the receiving terminal of the device, and the optical signal transmitting end of the device stops transmitting the optical signal. The optical transmission method of claim 18, further comprising: when providing power to the optical transceiver module of the device, the optical transceiver module of the device enters a detection effective state; when the detection is effective In the state, the device-side electronic signal transmitting end performs the device-side receiving terminal detection to determine whether the device is coupled to the device-side optical transceiver module, wherein when the detecting is in an active state, the device is terminated. The signal transmitter does not transmit the optical signal. For example, the optical transmission method described in claim 20 of the patent scope further includes: When the detection terminal is in the active state, and the device receiving terminal detects that the device is coupled to the device optical transceiver module, the device optical transceiver module enters the normal operation state; When the effective state is measured, and the receiving end of the device detects that the device is not coupled to the optical transceiver module of the device, the optical transceiver module of the device enters a detection stop state. The optical transmission method of claim 21, further comprising: when the device optical transceiver module enters the detection stop state for a second predetermined time, the device optical transceiver module returns the detection Valid state.