KR20180131286A - Optical communication connector and link training method thereof thereof - Google Patents

Abstract

A source device transmits a data signal. A sink device receives the data signal. A data transmission system transmits a data signal between the source device and the sink device through an optical communication connector arranged between the source device and the sink device. The optical communication connector comprises: a transmission module to determine quality of the data signal inputted from the source device through a first main link, and adjust the quality of the data signal to control a first link training operation to optimize the first main link in transmitting the data signal; a reception module to receive the data signal from the transmission module to output the data signal to the sink device through a second main link, and control a second link training operation to optimize the second main link in transmitting the data signal; and an optical cable to connect the transmission module and the reception module to transceive the data signal. The transmission module may generate a hot plug detection (HPD) signal to initialize the first link training operation. Accordingly, the optical communication connector is capable of sufficient channel compensation between the optical communication connector and the source device and between the optical communication connector and the sink device.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical communication connector,

The present invention relates to an optical communication connector, and more particularly, to a display port type optical communication connector including a control module for link training of a source device and a sink device, and a link training method thereof.

Recently, a high-resolution display interface has been developed in accordance with the development of image technology. Currently, next-generation display technologies such as UHD and 3D display are emerging in various ways.

Interfaces such as low voltage differential signaling (LVDS), high definition multimedia interface (HDMI) and display port (DisplayPort) are mainly used as the interface of the next generation display.

Among them, the DisplayPort interface is an interface defined by the Video Electronics Standards Association (VESA), which can connect an internal connection between a chip and a chip, as well as an external connection between a product and a product. Technology.

In general, a DisplayPort interface is a sink device, such as a television, home theater system or a computer monitor, from a source device such as a computer, a digital video disk (DVD) player or a digital video recorder (DVR) / RTI > and / or < / RTI >

A data transmission system that transmits data using the display port interface method uses a main link and an auxiliary channel (AUX-CH) for communication between a source device and a sink device do.

The source and sink devices optimize data transmission over the main link using a different set of parameters depending on distance. This process is referred to as link training. Link training changes the bit-rate (BR), pre-emphasis (PE) level and output swing of the source device for channel compensation between the source device and the sink device, setting for link negotiation. This link training is achieved through communication between the source device and the sink device via the supplemental channel of the source device and the sink device.

When the connected source device and the sink device are located at a distance from each other due to the display port interface method, long-distance communication needs to be performed, thereby causing noise and signal attenuation.

In the case where the source device and the sink device are required to perform long distance communication, the source device and the sink device may be connected to each other using an optical communication connector.

The optical communication connector includes a transmitting module for transmitting and receiving a data signal through a source device, a first main link and a first auxiliary channel, a receiving module for transmitting and receiving a data signal through a sink device, a second main link and a second auxiliary channel, And an optical cable connecting the receiving module to the receiving module.

The source device, the transmission module, the sink device, and the reception module are subjected to repetitive processing to optimize data transmission through the first main link and the second main link, respectively. This link optimization process is performed through the first supplementary channel and the second supplementary channel, respectively.

However, in the link optimization process through the first supplemental channel and the second supplemental channel, channel compensation is performed only with an equalizer disposed in each of the transmission module and the reception module, and adjustment of the pre- (default) value, there is a problem that the link compensation is not sufficiently optimized.

Of course, there is a method of implementing a link layer logic for channel compensation between a source device or a sink device and a transmitting module or a receiving module in a transmitting module or a receiving module. However, .

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical communication connector capable of providing sufficient channel compensation between an optical communication connector and a source device, and between an optical communication connector and a sink device, and a link training method therefor.

It is another object of the present invention to provide an optical communication connector capable of sufficiently performing channel compensation between a source device and an optical communication connector and between an optical communication connector and a sink device without implementing a complete link layer logic in the optical communication connector, And to provide an optical communication connector and a link training method therefor that can be reduced in size and advantageous in electric power.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a data signal transmission apparatus including a source device for transmitting a data signal, a sink device for receiving the data signal, and an optical communication connector disposed between the source device and the sink device. Wherein the optical communication connector is adapted to determine the quality of the data signal input from the source device via the first main link and to control the quality of the data signal, A transmission module for controlling a first link training operation for optimizing the first main link to transmit the data signal, a transmission module for receiving the data signal from the transmission module and transmitting the data signal to the sink device via a second main link And transmits the data signal to the second main link And a transmission module for transmitting and receiving the data signal by connecting the reception module to the reception module, wherein the transmission module includes a hot plug for initializing the first link training operation, A hot plug detection (HPD) signal can be generated.

The transmitting module includes an adaptive equalizer that determines the quality of the data signal input through the first main link and adjusts the quality of the data signal, a transmitting unit that transmits the data signal input from the adaptive equalizer, A signal transmitter, an electro-optical converter for receiving the data signal from the signal transmitter and converting the electrical data signal into an electrical signal by electro-optically converting the optical data signal, a hot plug detection signal for initializing the first link training, Generator, a first main controller for controlling operation of the adaptive equalizer, a first auxiliary channel controller for controlling a first link training operation for optimizing transmission of the data signal via a first main link, Generates a hot plug detection signal at the source device It can include a controller that controls the HPD 1 so that force.

The adaptive equalizer may include a signal quality determiner for determining the quality of the data signal and an equalizer for adjusting the quality of the data signal to improve the quality of the data signal under the control of the first main controller.

The hot plug detection signal generated by the hot plug detection signal generator may be a fake hot plug detection signal.

The receiving module includes a photoelectric transducer for converting an optical data signal input from the transmitting module to an electrical data signal through an optical cable, a signal amplifier for amplifying a signal input from the photoelectric transducer, a signal amplifier for amplifying the data signal A main link transmitter for adjusting the pre-emphasis and voltage swing size of the sink device, a hot plug detection signal detector for determining whether the hot plug detection signal of the sink device is turned on, a photoelectric converter, A second auxiliary channel controller for controlling the second link training operation for optimizing the transmission of the data signal through the second main link, a second auxiliary channel controller for controlling the operation of the second auxiliary channel controller based on the detection result of the hot plug detection signal detector The hot plug detection turn-on signal is transmitted to the always transmitting module The can 2 comprises a hot plug detection controller that controls the lock.

The main link transmitter can adjust the pre-emphasis and voltage swing size of the data signal to a desired size of the sink device.

A source device for transmitting a data signal according to an embodiment of the present invention, a sink device for receiving the data signal, and an optical communication connector disposed between the source device and the sink device, A method for link training of an optical communication connector, the method comprising: outputting a hot plug detection signal to the source device when a Hot Plug Detection (HPD) signal of a sink device is detected; Performing a first link training to find an optimal channel condition for a first main link between the sink device and the optical communication connector and performing a first link training to find an optimal channel condition for a sink device and a second main link of the optical communication connector And performing a second link training.

Performing the first link training comprises: manipulating the highest bit rate information among display identification data received from the sink device; performing CR training according to the highest bit rate information; failing the CR training; Requesting a voltage swing and pre-emphasis change of the main link output signal of the apparatus, performing EQ training when CR training is completed with voltage swing and pre-emphasis, receiving a data signal when EQ training is completed Determining and recording the quality of the data signal, generating and outputting a turn off signal of the hot plug detection signal, and generating and outputting a fake hot plug detection signal after a predetermined time to initialize the source device to resume link training Step < / RTI >

The first link training method may be repeated until the optimum voltage swing size and pre-emphasis value between the source device and the optical communication connector are recorded.

Performing the second link training comprises transmitting the display identification data and the display port configuration data of the sink device to the source device, performing CR training according to the display identification data and the display port configuration data, The channel between the sink device and the optical communication connector is set by operating the voltage swing and the pre-emphasis of the main link output signal of the optical communication connector to a value desired by the sink device, Establishing a voltage swing and pre-emphasis of the main link output signal of the source apparatus to an optimum value obtained through the first link training, and performing EQ training when the CR training is completed can do.

The present invention can include first and second auxiliary channel controllers for channel compensation within the optical communication connector to sufficiently perform channel compensation between the source device and the optical communication connector and between the optical communication connector and the sink device.

The present invention determines the quality of a signal transmitted between a source device and a transmission module of an optical communication connector and controls the turn-on or turn-off of a hot plug detection (HPD) signal until the signal quality is satisfied, And sufficient channel compensation can be made between the source device and the source device.

In the present invention, channel compensation is performed through link training between a receiving module and a sink device of an optical communication connector after sufficient channel compensation is performed between a source device and a transmitting module of an optical communication connector, thereby improving the quality of a data signal transmitted in a display port manner Can be improved.

In addition, the present invention does not need to significantly increase the chip size of the optical communication connector for optimal link training, thereby reducing the manufacturing cost of the optical communication connector.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

FIG. 1 is a block diagram schematically illustrating a display port type data transmission system using an optical communication connector according to an embodiment of the present invention. Referring to FIG.
FIG. 2 is a block diagram schematically illustrating a display port type data transmission system using an optical communication connector according to another embodiment of the present invention.
3 is a block diagram schematically illustrating a configuration of a transmission module of an optical communication connector according to an embodiment of the present invention.
4 is a block diagram schematically illustrating a configuration of a receiving module of an optical communication connector according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating a link training method of an optical communication connector according to an exemplary embodiment of the present invention.
FIG. 6 is a diagram sequentially illustrating the first link training method of FIG. 5;
FIG. 7 is a view sequentially illustrating the second link training method of FIG. 5;

Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Specific examples and arrangements in devices are described for the purpose of simplifying the present invention. These are merely examples and are not to be construed in a limiting sense. Further, the present invention repeats the drawing identification numbers and / or characters in various examples. Such repetition is used for the sake of simplicity and clarity, and is not intended to be limited to the relationship between the various embodiments and / or configurations discussed.

In addition, throughout the specification, when an element is referred to as " including " an element, it is to be understood that the element may include other elements, The phrases such as where a component is coupled to another component, coupled to, and / or coupled to, may include embodiments in which two components are directly connected, and in addition, another component may be coupled between two components Such that the two components are not directly connected to each other. Also, it will be understood that, if the terms referring to first, second, etc. may be used herein to describe various components, the components are not intended to be limited to these terms. Only these terms are used to distinguish one component from another.

FIG. 1 is a block diagram schematically illustrating a display port type data transmission system using an optical communication connector according to an embodiment of the present invention. FIG. 2 is a block diagram of a display port type data transmission system using an optical communication connector according to another embodiment of the present invention. FIG. 2 is a block diagram schematically showing a data transmission system of FIG.

1 and 2, a data transmission system 1000 or 2000 using an optical communication connector includes a source device 100, a sink device 200, and an optical communication between the source device 100 and the sink device 200. [ And a connector 300. At this time, the source device 100, the optical communication connector 300, the optical communication connector 300, and the sink device 200 may be connected by a display interface method, respectively.

The display port interface type data transmission system 1000 or 2000 using the optical communication connector is provided between the source device 100 and the optical communication connector 300 and between the optical communication connector 300 and the sink device 200 It can have two transport channels. More specifically, a first main link and a first auxiliary channel may be provided between the source apparatus 100 and the optical communication connector 300, and a second main link may be provided between the optical communication connector 300 and the sink apparatus 200. [ And a second supplemental channel.

The first and second supplemental channels may transmit data signals for establishing or configuring the first and second main links between the source device 100 and the sink device 200 connected using the optical communication connector 300, Way communication link transmitting data for controlling the sink device (100) or the sink device (200). In addition, the first and second supplemental channels are used for the first and second link training for initial link matching between the source device 100 and the sink device 200. Here, the first link training is training for the first main link between the source apparatus 100 and the optical communication connector 300, and the second link training is for training the first main link between the source apparatus 100 and the sink apparatus 200, Training for the main link and the second main link. Particularly, the validity and status of the first main link and the second main link are confirmed using the first supplemental channel and the second supplemental channel between the source apparatus 100 and the sink apparatus 200, May be used to implement modifications to the first and second main links. In other words, the first and second supplemental channels may be used to establish and maintain the first and second main link connections.

The first and second main links are unidirectional communication channels for transmitting data signals from the source apparatus 100 to the sink apparatus 300. For example, the first and second main links may consist of one, two, or four data pairs, commonly referred to as " lanes ".

The source device 100 is a device for transmitting video and / or audio related data signals and may be, for example, a digital video recorder (DVR), a digital video disk player (DVD), a computer, a hard drive or a video and / Or other storage device. The source device 100 starts communication with the sink device 200 and transmits the data signal to the sink device 200. [ Although not shown, the source device 100 may include a stream source, a link policy maker, and a stream policy maker. Here, the link policy maker is used to initialize, configure and maintain the link, and the stream policy maker is used to initialize and manage stream video and audio data signal transmission.

The sink device 200 may be a device that receives a data signal, for example, a television (TV), a computer monitor, a home theater system, or other device that receives video and / or audio data signals. Although not shown, the sink device 200 is provided with a link policy maker, a stream policy maker, display identification data (EDID), display port configuration data (hereinafter referred to as DPCD Quot;). ≪ / RTI > Here, the DPCD stores the configuration and the status of the currently configured main link in a specific memory address, and the EDID stores the performance of the sink device 200.

The optical communication connector 300 is disposed between the source device 100 and the sink device 200 so that the source device 100 and the sink device 200 disposed at a great distance can efficiently transmit data to each other. The optical communication connector 300 includes a transmission module 310, a reception module 320 and an optical cable 330 connecting the transmission module 310 and the reception module 320.

The transmission module 310 is connected to the source device 100 through a display port (DischargeAport). That is, the transmitting module 310 and the source device 100 are connected through the first main link and the first auxiliary channel. The transmission module 310 equalizes the data signal transmitted from the source device 100 and converts the data signal into an electrical signal and then transmits the electro-optically converted data signal to the receiving module 320 of the optical communication connector 300 through the optical cable 330 do. In particular, the transmission module 310 may determine the quality of the data signal input from the source apparatus 100 when performing the first link training and may optimize the first main link according to the signal quality determination of the data signal. This first link training is performed using the first supplemental channel.

In order to efficiently perform the first link training, the transmission module 310 includes a first auxiliary channel controller, a signal quality determination unit, and a first hot plug decoders (HPD) (hereinafter referred to as 'HPD'). ) Controller to optimize the first main link between the source device 100 and the transmission module 310. [ Here, HPD (Hot Plug Detection) notifies the connection status of the source device 100 and the sink device 300. The detailed configuration of the transmission module 310 will be described with reference to FIG.

The receiving module 320 may be connected to the sink device 200 in a display port manner. That is, the receiving module 320 and the sink device 200 are connected through the second main link and the second auxiliary channel. The receiving module 320 receives the data signal converted from the transmission module 310 through the optical cable 330, converts the received data signal to a photoelectric conversion, and then transmits the data signal to the sink device 200. [ In particular, the receiving module 320 may receive the request information of the source device 100 from the transmitting module 310 and transmit the request information to the sink device 200 during the second link training. Accordingly, the receiving module 320 may perform a second link training to optimize the first main link and the second main link between the source device 100 and the sink device 200. [ At this time, the receiving module 320 may perform the second link training through the second supplemental channel. In order to efficiently perform the second link training, the receiving module 320 includes a second auxiliary channel controller and a second HPD controller in the interior thereof, and is connected to the source device 100 and the sink device 200, more specifically, Thereby optimizing the second main link between the module 320 and the sink device 200. The detailed configuration of the receiving module 320 will be described with reference to FIG.

The optical cable 330 may connect the transmission module 310 and the reception module 320 of the optical communication connector 100 through one optical fiber line as shown in FIG. As shown in FIG. 1, when data is transmitted through one optical cable, the photoelectric transducer of the light modulator of the transmission module 310 and the photoelectric converter of the reception module 320 may be a WDM (Wavelength Division Multiplexer). Here, wavelength division multiplexing refers to a device that combines optical signals of different wavelengths transmitted through different optical fibers into one optical fiber.

1, the optical cable 330 of the present invention may be implemented by connecting through one optical fiber line. However, the present invention is not limited thereto. For example, as shown in FIG. 2, Lt; / RTI > 2, when the transmission module 310 and the reception module 320 are connected in a hybrid manner, the transmission module 310 includes an LD for generating an optical signal, a lens for condensing the light output from the LD, The MPD may have a Transmitter Optical Sub-Assembly (TOSA) structure. Meanwhile, the receiving module 320 includes an SOA for amplifying an optical signal, a PD for converting an optical signal into an electric signal, a Receiver Optical Sub-Assembly (ROSA) for receiving a WDM for distributing an input light wavelength and an output light wavelength, Structure.

2 is a block diagram schematically showing a configuration of a transmission module of an optical communication connector according to an embodiment of the present invention.

2, a transmitting module 310 of an optical communication connector 300 according to an embodiment of the present invention includes an adaptive equalizer 311, a signal transmitter 312, an electro-optical converter 313, Module 314, a first supplemental channel transceiver 315, and an HPD generator 316. [

The adaptive equalizer 311 can determine the quality of the data signal input from the source device 100 via the first main link and adjust the quality of the data signal. The adaptive equalizer 311 may include an equalizer 3111 and a signal quality determiner 3112.

The equalizer 3111 adjusts the quality of the data signal so as to improve the quality of the data signal. The equalizer 3111 may be controlled by the first control module 313 that generates the control signal according to the signal quality of the signal quality determiner 3112.

The signal quality determination unit 3112 determines the quality of the data signal input through the first main link, and records the determination result.

The signal transmitter 312 generates an input driving signal of the data signal and the data signal transmitted from the adaptive equalizer 311 and transmits the generated driving signal to the EO converter 313.

The electro-optical converter 313 generates an optical signal in accordance with an input driving signal of the signal transmitter 312, converts the electrical data signal into an optical data signal using the generated optical signal, 320). 1 and 2, the electro-optical converter 313 is controlled by the first control module 314, but it is not limited thereto.

The first control module 314 controls the reception and transmission operation of the data signal transmitted through the first main link or the transmission module 310 of the optical communication connector 300 and the source device 100 through the first auxiliary channel, And can control inter-link first and second link training operations. The first control module 314 may include a first main controller 3141, a first auxiliary channel controller 3142 and a first HPD controller 3143.

The first main controller 3141 controls the overall operation of the transmission module 310. In particular, the first main controller 3141 can control the operation of the adaptive equalizer 311. More specifically, the first main controller 3141 receives the quality determination result of the data signal input through the first main link from the signal quality determination unit 3112, and controls the operation of the equalizer 3111.

The second auxiliary channel controller 3142 controls the first and second link training operations to optimize the transmission of the data signal through the first main link. The first auxiliary channel controller 3142 may be a transparent mode in which only the information requested from the source device 100 is transmitted to the sink device 200 during the link training operation and a response to the information requested from the source device 100 A sink interruption mode in which the sink device 200 is shut off and a mode in which the response of the sink device 200 to the information requested by the source device 100 is manipulated and transmitted to the source device 100, Module 310 to operate.

The first HPD controller 3143 controls generation and output of the HPD signal for initiating the first and second link training operations when the HPD signal of the sink device 200 is detected to be turned on. In particular, the first HPD controller 3143 determines that the HPD signal is turned off even if the HPD signal of the sink device 200 is turned on to determine the optimal Vp2p and PE by determining the quality of the data signal So as to generate a fake HPD signal. That is, the fake HPD signal may be a signal to initialize source device 100 to perform link training again.

The first supplemental channel transceiver 315 transmits and receives link optimization process related data through the first supplemental channel between the source device 100 and the transmission module 310.

When the HPD signal is detected from the sink device 200, the HPD signal generator 316 transmits the HPD detection signal through the optical cable 330 and initializes the source device 100 under the control of the first HPD controller 3142 To generate the HPD signal. In this way, the HPD signal generator 316 can generate a fake HPD signal under the control of the first HPD controller 3142.

The transmission module 310 of the optical communication connector 300 according to an embodiment of the present invention includes a first main controller 3141, a first auxiliary channel controller 3142 and a first HPD controller 3143 The first control module 314 including the first control module 314 may be provided with sufficient channel compensation between the optical communication connector 330 and the sink device 200 as well as sufficient channel compensation between the source device 100 and the optical communication connector 330 can do.

 4 is a block diagram schematically illustrating a configuration of a receiving module of an optical communication connector according to an embodiment of the present invention.

4, the receiving module 320 of the optical communication connector 300 according to an exemplary embodiment of the present invention includes a photoelectric converter 321, a signal amplifier 322, a main link transmitter 323, A first secondary channel transceiver 324, a second secondary channel transceiver 325 and an HPD detector 326.

The photoelectric converter 321 converts the optical data signal received through the optical cable 330 into an encoded data signal. 1 and 2, the photoelectric converter 321 is controlled by the second control module 324, but the present invention is not limited thereto.

The signal amplifier 322 amplifies the data signal encoded by the photoelectric converter 321 and transmits the amplified data signal to the main link transmitter 323.

The main link transmitter 323 may equalize the amplified data signal and transmit the data signal to the sink device 200 under the control of the second control module 324. [ At this time, the main link transmitter 323 can control the link training between the source apparatus 100 and the sink apparatus 200, that is, the size of PE and Vp2p of the data signal in the second link training. For example, if the lock of the clock recovery (CR) signal fails during link training between the source device 100 and the sink device 200, the sink device 200 And the main link transmitter 323 can adjust the size of the sink device 300 to the desired Vp2p and PE.

The second control module 324 controls the transmission and reception of data signals through the second main link or the second link training operation between the sink device 200 and the optical communication connector 300 via the second supplemental channel have. The second control module 324 may include a second main controller 3241, a second auxiliary channel controller 3242, and a second HPD controller 3243.

The second main controller 3241 controls the overall operation of the second reception module 320. [ In particular, the second main controller 3241 can control the operation of the main link transmitter 323. More specifically, the second main controller 3241 can control the PE and Vp2p to be adjusted by the main link transmitter 323 when the response of the sink device 200 is received and the adjustment of the PE and Vp2p is required.

The second auxiliary channel controller 3242 controls the entire second link training operation to optimize the transmission of the data signal transmitted through the optical cable 330 on the second main link. The second auxiliary channel controller 3242 is a transparent mode in which only the information requested from the source apparatus 100 is transmitted to the sink apparatus 200 during the first and second link training operations, A sink blocking mode in which the sink device 200 is blocked by a response to the information and an operation mode in which the response of the sink device 200 to the information requested from the source device 100 is manipulated and transmitted to the source device 100 It is possible to control the receiving module 320 to operate in one mode.

The second HPD controller 3243 controls the HPD signal to be transmitted to the transmission module 310 through the optical cable 330 when the HPD signal is inputted from the sink device 200.

The second auxiliary channel transceiver 325 transmits and receives the second main link triangulation related data through the second auxiliary channel between the receiving module 320 and the sink device 200. [

The HPD detector 326 can sense an HPD signal that can determine if the sink device 200 is connected.

The receiving module 320 of the optical communication connector 300 according to an embodiment of the present invention includes a second main controller 3241, a second auxiliary channel controller 3242 and a second HPD controller 3243 And a second control module 324 including the second control module 324 may be provided to sufficiently perform channel compensation between the reception module 320 and the sink device 200. [

The link training method between the source apparatus 100 and the sink apparatus 200 using the optical communication connector according to an embodiment of the present invention will now be described in detail with reference to FIGS. 5 to 7. FIG.

FIG. 5 is a diagram illustrating a link training method of an optical communication connector according to an exemplary embodiment of the present invention.

5, in the link training of the optical communication connector 300 according to the present invention, when the HPD signal of the sink device 200 is detected (S510), the optical communication connector 300 generates and generates an HPD signal And outputs the HPD signal to the source apparatus 100 (S520).

Thereafter, a first link training is performed for sufficient channel compensation between the source apparatus 100 and the transmitting module 310 of the optical communication connector 300 (S530), and after the first link training is performed, the source apparatus 100 ) And the sink device 200 is performed (S540).

In the display port type data transmission system using the optical communication connector 300, the number of lanes to be used and the bit rate (BR) to be used is determined by the source device 100 and the sink The second link training result, which is the link training between the device 200, is determined by negotiation between the source device 100 and the sink device 200. [ At this time, the optical communication connector 300 can not transmit the source device 100 (or the optical communication connector 300) to the source device 100 in advance so that the channel between the source device 100 and the optical communication connector 300 can be sufficiently compensated regardless of how many lanes are used, 100, and the optical communication connector 300, that is, the transmission module 310, the source device 100 can determine optimal source device setting conditions according to all lanes and all bit rates. And the transmission module 310 of the optical communication connector 300 may be referred to as a first link training process. In order to perform the first link training, the transmission module 310 performs link training for all possible cases of Vp2p and PE while controlling the source device 100 using the HPD signal and DPCD information manipulation, The signal quality is judged to determine the optimum Vp2p and PE for each lane.

A more detailed method of the first link training among the link training methods of the optical communication connector 300 will be described with reference to FIG.

FIG. 6 is a diagram sequentially illustrating the first link training method of FIG. 5;

Referring to FIG. 6, when the first link training is started, an EDID (Extended Display Indication Data) information request is received from the source device 100 (S5301) and transmitted to the sink device 200 through the optical communication connector 300 .

When the receiving module 320 of the optical communication connector 300 receives the EDID information response from the sink device 200, the receiving module 320 transmits the received EDID information to the transmitting module 310. The transmitting module 310 transmits the received EDID information (S5302), and transmits the edited EDID information to the source apparatus 100 (S5303).

The transmitting module 310 receives the DPCD information request from the source device 100 and transmits the DPCD information to the receiving module 320. The receiving module 320 transmits the DPCD information to the sink device 200, 200, and the receiving module 320, it transmits the DPCD information response to the source device 100 (S5304).

Thereafter, the CR pattern signal is received from the source apparatus 100 (S5305). At this time, the received CR pattern signal may be the lowest level Vp2p and the lowest level PE.

Since the CR pattern signal is received at the lowest level of Vp2p and PE, the transmission module of the optical communication connector 300 (step S5306) 310 transmits a response indicating that the CR lock has failed to the source device 100, and requests to change to Vp2p and PE at different levels (S5307).

After the predetermined time has elapsed, the transmission module 310 transmits an answer signal indicating that the CR lock is successful to the source device 100 (S5309) when receiving the CR lock answer request from the source device 100 in S5308.

Thereafter, the transmission module 310 of the optical communication connector 300 receives the EQ pattern signal from the source device 100 (S5310), determines whether EQ has been completed from the source device 100 after a predetermined time, (S5311).

Thereafter, when the transmission module 310 transmits an EQ done answer signal (S3312), the data signal is received from the source device 100 (S5313).

The transmission module 310 determines and records the signal quality of the received data signal (S5314) and generates / outputs the HPD turn-off signal (S5315). However, the reason that the transmitting module 310 generates and outputs the HPD turn-off in spite of the fact that the first link training is not completed is because the first link training is judged to be completed in the position of the source device 100.

However, the source device 100 and the transmitting module 310 may continue to perform the first link training until an optimal channel condition of the first main link is found. Accordingly, even if the HPD turn-off signal is generated and output in step 5315, the first link training may not be completely completed.

Then, the transmission module 310 generates an HPD turn-on signal for starting the first link training to find the optimal Vp2p and PE for all the bit rates (BR) and outputs it to the source device 100 (S5316). At this time, the generated HPD turn-on signal may be a fake HPD signal.

In addition, the HPD turn-off signal and the HPD turn-on signal in steps 5315 and 5316 may be a fake HPD signal. The fake HPD signal is used to initialize the source device 100 to find the optimum channel condition between the source device 100 and the transmission module 310 even when the sink device 200 is turned on and perform the first link training several times To deceive the source device 100 in order to do so. That is, the fake HPD signal may be a signal that initializes the source device 100 to resume the first link training.

Then, the transmission module 310 determines whether the signal quality check for all combinations of Vp2p and PE is completed (S5317). If it is determined that the signal quality check has been completed, the transmission module 310 records the signal quality optimal Vp2p, PE (S5318). If it is determined that the signal quality check for all combinations of Vp2p and PE is not completed, the Vp2p and the PE values to be changed are changed (S5319). Upon receiving the EDID information request from the source device 100 (S5301) Training is resumed.

It is determined whether the first link training for all the bit rates BR has been completed after recording the signal quality optimal Vp2p and PE in step S5320. If it is determined that the first link training for all the bit rates BR is completed, The link training is ended, the bit rate to be operated is changed if it is determined that the first link training for all the bit rates is not completed, and the first link training is performed while receiving the EDID information request from the source apparatus 100 (S5301) It starts again.

By repeatedly performing the first link training for all the bit rates, the source device 100 and the transmission module 310 can know the Vp2p and the PE level of the optimal source device 100 for transmitting and receiving data signals .

FIG. 7 is a view sequentially illustrating the second link training method of FIG. 5;

Referring to FIG. 7, when the optical communication connector 300 generates and outputs an HPD turn-on signal to the source apparatus 100, the second link training, which is a link training between the source apparatus 100 and the sink apparatus 200, is started.

The source apparatus 100 requests EDID information and DPCD information to the sink apparatus 200 and the sink apparatus 200 makes the source apparatus 100 a response to the EDID information and the DPCD information. At this time, the optical communication connector 300 only transmits EDID information and DPCD information (S5401)

Thereafter, the CR pattern signal received from the source apparatus 100 is transmitted to the sink device 200 (S5402). At this time, the transmitted CR pattern signal may be a combination signal of the lowest level Vp2p and the lowest level PE.

The receiving module 320 of the optical communication connector 300 receives a CR lock failure signal from the source device 100 after a predetermined time at step S5403 and transmits a CR lock failure signal to the transmitting module 310 The transmission module 310 transmits Vp2p and PE to a level corresponding to the bit rate set by the source device 100 among the optimal Vp2p and PE level found through the first link training, To the source device 100 (S5404).

After a predetermined period of time, the optical communication connector 300 receives a CR lock answer from the sink device 200 by transmitting a request to the sink device 200 to answer the CR lock received from the source device 100 (S5405) (S3406).

The receiving module 320 of the optical communication connector 300 determines whether the CR lock of the sink device 200 is successful (S5407). If it is determined that the CR lock is successful, the receiving module 320 of the optical communication connector 300 transmits a CR lock success answer to the transmitting module 310, Lock success reply to the source device 100 (S5408).

The receiving module 320 of the optical communication connector 300 receives the Vp2p and PE values requested by the sink device 200 from the sink device 200 when it is determined that the CR lock of the sink device 200 has failed , And applies the Vp2p and the PE value requested by the sink device 200 to the main link transmitter 323 (S5410). That is, Vp2p and PE level between the sink device 200 and the receiving module 320 of the optical communication connector 300 are changed to values requested by the sink device 200. [ Meanwhile, the optical communication connector 300 operates the Vp2p and the PE values between the source device 100 and the transmission module 310 to the optimal value recorded in the first link training (S5411), and then transmits the CR pattern signal to the sink device 200) (S3402) and restarts the CR training process during the second link training.

When the CR lock success response is transmitted to the source apparatus 100, the receiving module 320 of the optical communication connector 300 transmits the EQ pattern signal transmitted from the source apparatus 100 to the sink apparatus 200 (S5412).

Whether or not the EQ has been completed from the source apparatus 100 after a predetermined time has elapsed. If an answer request signal is received, the EQ done answer signal is transmitted to the sink device 200 in step S5413. (S5414).

The receiving module 320 of the optical communication connector 300 determines whether the EQ done is successful (S5415). If it is determined that the EQ done is not successful, the receiving module 320 of the optical communication connector 300 receives the Vp2p and the PE change value requested by the sink device 200 The Vp2p and the PE level between the sink device 200 and the reception module 320 are set to the same level as that requested by the sink device 200 by applying the Vp2p and the PE value requested by the sink device 200 to the main link transmitter 323 in step S5417, Value. Meanwhile, the optical communication connector 300 operates the Vp2p and PE values between the source device 100 and the transmission module 310 to the optimal value recorded in the first link training (S5418), and transmits the EQ pattern signal to the sink device 300 (S5412) and resumes the EQ training process during the second link training.

Meanwhile, if it is determined that the EQ done is successful, the optical communication connector 300 delivers the EQ done answer to the source device 100 (S5419), and the second link training is completed.

In this way, in the second link training operation, the receiving module 320 of the optical communication connector 300 operates in a transparent mode, and operates in the operation mode when the CR lock is failed or the EQ done is failed . The channel condition between the source device 100 and the transmission module 310 can be optimized and the channel condition between the reception module 320 and the sink device 200 can be optimized to improve the signal quality of the data signal Can be improved.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1000: Data transmission system including optical communication connector
100: source device
200: sink device
300: Optical communication connector
310: Transmission module
311: Adaptive equalizer
312: Signal Transmitter
313: Electro-optical converter
314: first control module
3141: First main controller
3142: First auxiliary channel controller
3143: First HPD controller
315: first auxiliary channel transmitter
316: HPD Generator
320: receiving module
321: Photoelectric converter
322: Signal Amplifier
323: Main link transmitter
324: second control module
3241: Second main controller
3242: Secondary auxiliary channel controller
3143: 2nd HPD controller
315: second auxiliary channel detector
316: HPD detector

Claims (10)

A data transmission system for transmitting a data signal between a source device for transmitting a data signal, a sink device for receiving the data signal, and an optical communication connector disposed between the source device and the sink device, Wherein the optical communication connector comprises:
A first link training operation for determining a quality of the data signal inputted through the first main link from the source apparatus and adjusting a quality of the data signal to optimize the first main link for transmitting the data signal Transmitting module;
A second link training operation for receiving the data signal from the transmission module and outputting the data signal to the sink device via a second main link and optimizing the second main link for transmitting the data signal; Receiving module; And
And an optical cable connecting the transmission module and the reception module to transmit and receive the data signal,
Wherein the transmitting module generates a Hot Plug Detection (HPD) signal for initiating the first link training operation. 2. The apparatus of claim 1,
An adaptive equalizer for determining the quality of the data signal input through the first main link and adjusting the quality of the data signal;
A signal transmitter for transmitting the data signal input from the adaptive equalizer;
An electro-optical transducer for receiving the data signal from the signal transmitter and electro-optically converting an optical data signal;
A hot plug detection signal generator for generating a hot plug detection signal for initiating the first link training and outputting the hot plug detection signal to the source device;
A first main controller for controlling operation of the adaptive equalizer;
A first auxiliary channel controller for controlling a first link training operation for optimizing transmission of the data signal through the first main link; And
And a first HPD controller for generating the hot plug detection signal in the hot plug detection signal generator and controlling the hot plug detection signal to be output to the source device. 3. The adaptive equalizer of claim 2,
A signal quality determination unit for determining a quality of the data signal; And
And an equalizer for adjusting the quality of the data signal so as to improve the quality of the data signal under the control of the first main controller. The method of claim 3,
Wherein the hot plug detection signal generated in the hot plug detection signal generator is a fake hot plug detection signal. The receiver of claim 1,
A photoelectric converter for converting an optical data signal input from the transmission module through the optical cable into an electrical data signal;
A signal amplifier for amplifying a signal input from the photoelectric converter;
A main link transmitter for adjusting a pre-emphasis and a voltage swing size of the data signal of the data signal inputted from the signal amplifier;
A hot plug detection signal detector for determining whether the hot plug detection signal of the sink device is turned on;
A second main controller for controlling operations of the photoelectric converter and the main link transmitter;
A second auxiliary channel controller for controlling the second link training operation to optimize transmission of the data signal through the second main link;
And a second hot plug detection controller for controlling the hot plug detection turn-on signal to be transmitted to the always-transmitting module according to the detection result of the hot plug detection signal detector. 6. The method of claim 5,
Wherein the main link transmitter adjusts a pre-emphasis and a voltage swing size of the data signal to a desired size of the sink device. A data transmission system for transmitting a data signal between a source device for transmitting a data signal, a sink device for receiving the data signal, and an optical communication connector disposed between the source device and the sink device, Wherein the link training method of the optical communication connector comprises:
Outputting a hot plug detection signal to the source device when a hot plug detection (HPD) signal of the sink device is detected;
Performing a first link training to find an optimal channel condition for a first main link between the source device and the optical communication connector; And
And performing a second link training to find an optimal channel condition for the sink device and the second main link of the optical communication connector. 8. The method of claim 7, wherein performing the first link training comprises:
Operating the highest bit rate information among the display identification data received from the sink device;
Performing CR training according to the highest bit rate information;
Requesting a voltage swing and a pre-emphasis change of the main link output signal of the source apparatus by failing the CR training;
Performing EQ training when the CR training is completed with the voltage swing and pre-emphasis;
Determining the quality of the data signal by receiving the data signal when the EQ training is completed;
Generating and outputting a turn-off signal of the hot plug detection signal; And
And generating and outputting a fake hot plug detection signal after a predetermined time to initialize the source device to resume link training. 9. The method of claim 8,
Wherein the first link training method is repeatedly performed until an optimal voltage swing size and a pre-emphasis value between the source device and the optical communication connector are recorded. 7. The method of claim 6, wherein performing the second link training comprises:
Transferring display identification data and display port configuration data of the sink device to the source device;
Performing CR training according to the display identification data and the display port configuration data;
When the CR training fails, the channel between the sink device and the optical communication connector is set by operating the voltage swing and pre-emphasis of the main link output signal of the optical communication connector to a value desired by the sink device, And a channel between the optical communication connector set a voltage swing and pre-emphasis of a main link output signal of the source apparatus to an optimum value obtained through the first link training; And
And performing EQ training when the CR training is completed.

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