JP4965719B2 - Transmission system, repeater and receiver - Google Patents

Description

  The present invention relates to a data transmission apparatus that transmits data via a transmission line, and more particularly, to a data transmission apparatus that can change the number of lanes of a transmission line.

  In recent years, in the field of transmitting data over a long distance, an increase in transmission speed in a method of transmitting data via a single transmission channel (or lane) has reached a peak. Accordingly, in order to improve the communication band, a technique (lane coupling, multi-lane skew correction) that bundles a plurality of lanes to be viewed as one link has been developed (see, for example, Patent Document 1 and Non-Patent Document 1). .

  Patent Document 1 describes a transmission method using a plurality of lanes. In a transmission method using multilanes, correction of a difference in transmission distance between lanes, or in a transmission method using optical transmission, correction of arrival time difference (hereinafter referred to as skew) of data caused by a difference in optical wavelength of each lane becomes a problem. Further, it is necessary to change the number of lanes according to the transmission medium. In Patent Document 1, a data string is divided into a plurality of virtual lanes in units of code blocks, and the transmission lane is corrected while correcting the skew between lanes every time the number of lanes is converted in the repeater, while maintaining the transmission capacity constant. The number of can be changed.

  Non-Patent Document 1 describes a transmission method using a plurality of lanes as a standardized technology of 100 Gigabit Ethernet (Ethernet is a registered trademark, the same applies hereinafter). In 100 Gigabit Ethernet, there is a description regarding multi-lane transmission that realizes a transmission rate of 100 Gbps by bundling 20 lanes of data of a virtual lane of 5 Gbps. In a transmission method using multilanes, correction of a difference in transmission distance between lanes, or in a transmission method using optical transmission, correction of arrival time difference (hereinafter referred to as skew) of data caused by a difference in optical wavelength of each lane becomes a problem. Further, it is necessary to change the number of lanes according to the transmission medium.

  In 100 gigabit Ethernet, the number of transmission lanes is maintained while the transmission capacity is constant by dividing a 100 Gbps data string into 20 virtual lanes in code block units and multiplexing / dividing 20 virtual lanes in bit units. Can be changed.

JP 2006-253852 A

IEEE P802.3ba, Clause 82, "Physical Coding Suber (PCS) for 64B / 66B, type 40GBASE-R and 100GBASE-R"

  However, Patent Document 1 and Non-Patent Document 1 indicate that when a failure occurs in a part of lanes, it is considered that the entire link is broken and the entire link is disconnected. Therefore, there is no description about a function that avoids a failure that occurs in some lanes and increases the fault tolerance.

  An object of the present invention is to provide a transmission system in which faults occurring in some lanes are avoided and fault tolerance is improved in multi-lane transmission in which the number of lanes can be changed.

  A typical example of the present invention is as follows. That is, a transmitter that transmits transmission data to a receiver, a relay that receives the transmission data from the transmitter, and transfers the received transmission data to the receiver, and receives the transmission data from the relay A transmission system including a receiver, wherein the transmitter and a relay that receives transmission data from the transmitter are connected by a plurality of first transmission lanes, and the relay that transmits the transmission data to the receiver; The receiver is connected by a plurality of second transmission lanes, and the transmitter, the repeater, and the receiver include a plurality of virtual lanes for multiplexing a data sequence according to the number of transmission lanes, and the transmission Based on the used lane information that is transmitted from the receiver and includes information on the available virtual lanes, the number of available virtual lanes in the data string Divide communication data, insert the usable lane information into a data string output from the virtual lane, multiplex the data string output from each virtual lane based on the number of first transmission lanes, The multiplexed data sequence is transmitted, and the relay receives the multiplexed data sequence from each of the first transmission lanes, and based on the usable lane information included in the received data sequence, The received data string is divided into data strings of the number of usable virtual lanes, the failure of each virtual lane is monitored, and at least one of the data strings output from the virtual lane in which the failure has occurred Is converted to information for notifying a failure, and each data string output from the virtual lane is multiplexed based on the number of transmission lanes of the second transmission path, and the multiplexed data is A sequence is transmitted to the receiver or the other repeater, and the receiver receives the multiplexed data sequence from each of the second transmission lanes, and the usable lane included in the received data sequence Based on the information, the received data string is divided into a data string of the number of usable virtual lanes, the failure of each virtual lane is monitored, and the virtual lane in which the failure has occurred based on the monitoring result Identifying the usable virtual lane, transmitting the used lane information including information on the determined usable virtual lane to the transmitter, and converting the divided data string into the transmission data. It is characterized by restoring.

  According to one aspect of the present invention, it is possible to maintain a connection by avoiding a failure that has occurred in some transmission lanes, using only normal lanes, and reducing communication capacity. A transmission system with improved tolerance can be provided.

It is a figure which shows the structure of the data transmission system of embodiment of this invention. It is a figure which shows the structure of the data transmission system of embodiment of this invention. It is a block diagram explaining the transmitter of 1st embodiment of this invention. It is a block diagram explaining the relay machine of 1st embodiment of this invention. It is a block diagram explaining the receiver of 1st embodiment of this invention. It is a block diagram explaining the relay machine of 2nd embodiment of this invention. It is a block diagram explaining the receiver of 2nd embodiment of this invention. It is a block diagram explaining the transmitter of 3rd embodiment of this invention. It is a block diagram explaining the relay machine of 3rd embodiment of this invention. It is a block diagram explaining the receiver of 3rd embodiment of this invention. It is a block diagram explaining the relay machine of 4th embodiment of this invention. It is a block diagram explaining the receiver of 4th embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a diagram showing a configuration of a data transmission system according to an embodiment of the present invention.

  The data transmission system includes a transmitter 1, a repeater 2, and a receiver 3.

  A transmission data frame (hereinafter referred to as transmission data) transmitted to the receiver 3 is input to the transmitter 1. The transmitter 1 divides input transmission data into n transmission lanes and outputs the divided transmission data. In addition, the use lane information output from the receiver 3 is input to the transmitter 1.

  The transmitter 1 is connected to the repeater 2 via a first transmission path composed of n physical lanes, and data output from the transmitter 1 is input to the repeater 2 via the first transmission path. Is done. The repeater 2 outputs the data input via the second transmission path constituted by m physical lanes to the receiver 3. Note that n and m are integers of 2 or more, and n and m are different integers.

  The receiver 3 is connected to the repeater 2 via the second transmission path, and data output from the repeater 2 is input to the receiver 3. The receiver 3 outputs the input data as a reception data frame (hereinafter referred to as reception data). The receiver 3 finally determines a usable lane, and outputs information regarding the determined usable lane to the transmitter 1 as used lane information.

  In the present invention, the use lane information enables the transmitter 1 to transmit data using a transmission lane other than the transmission lane in which the failure has occurred.

  FIG. 2 is a diagram showing a configuration of a data transmission system according to another embodiment of the present invention.

  The data transmission system includes a transmitter / receiver 4 (4-1, 4-2) including a transmitter 1 and a receiver 3, and a repeater 2. As shown in FIG. 2, there are two transmission paths having different directions between the transceiver 4-1 and the transceiver 4-2.

  The present data transmission system is different from the embodiment shown in FIG. 1 in that the use lane notification output from the receiver 3 is output to the transmitter 1 using the opposite reverse transmission path. Since other configurations are the same as those in FIG.

  Note that there may be a plurality of relay units 2 between the transmitter 1 and the receiver 3.

[First embodiment]
FIG. 3 is a block diagram illustrating the transmitter 1 according to the first embodiment of the present invention.

  The transmitter 1 includes a frame buffer 10, a capacity conversion unit 12, a transmission encoding unit 13, a round robin unit 14, a marker insertion unit 15 (15-1 to 15-p), and a multiplexer unit 17.

  First, the data flow of the transmitter 1 will be described.

  The transmission data is input to the frame buffer 10. In addition, the data string is input from the receiver 3 to the capacity conversion unit 12, the round robin unit 14, and the marker insertion unit 15 (15-1 to 15-p).

  The frame buffer 10 outputs the data string to the transmission data output source and the capacity converter 12. The capacity converter 12 outputs the data string to the frame buffer 10 and the transmission encoder 13. The transmission encoding unit 13 outputs the data string to the round robin unit 14.

  The round robin unit 14 outputs a data string to the marker insertion unit (15-1 to 15-p). The marker insertion unit (15-1 to 15-p) outputs a data string to the multiplexer unit 17. The multiplexer unit 17 outputs a data string to the first transmission path.

  Next, details of the operation of each unit of the transmitter 1 will be described.

  The transmission data is input to the frame buffer 10. However, the frame buffer 10 transmits a buffer amount notification to the transmission source of the transmission data in accordance with the buffer amount of the data accumulated in the frame buffer 10.

  The transmission source of transmission data stops transmission of transmission data based on the received buffer amount notification. The frame buffer 10 receives a read request from the capacity conversion unit 12 and outputs transmission data.

  The capacity conversion unit 12 receives the use lane information transmitted by the receiver 3, and calculates a transmission capacity that can be transmitted using a lane that can be used on the transmission path based on the received use lane information. For example, the transmission capacity that can be transmitted can be calculated by multiplying the transmission capacity that can be transmitted in one lane by the number of usable lanes. Further, the capacity conversion unit 12 controls the reading of the frame buffer 10 by using a transmission data read request so that the capacity of the transmission data output from the frame buffer 10 is equal to the calculated transmission capacity.

  The transmission encoding unit 13 converts the data string of the transmission data input from the capacity conversion unit 12 into a transmission code (for example, 64B / 66B code), and outputs the transmission data to the round robin unit 14. The present invention is not limited to transmission codes, and may be other than 64B / 66B codes.

  The round robin unit 14 cyclically allocates transmission data to normal virtual lanes among the p virtual lanes based on the received use lane information. At this time, it is optimally distributed in units of code blocks of data encoded by the transmission encoding unit 13 (in the case of 64B / 66B codes, a 66-bit data string). Note that p is preferably the least common multiple of the number of lanes (n, m) in the first transmission lane and the second transmission lane constituting the transmission path.

  The transmission data that is divided into virtual lanes and transmitted simultaneously is received by the receiver 3 with an arrival time difference (skew) caused by a difference in transmission time on the transmission path. Therefore, the marker insertion unit 15 (15-1 to 15-p) inserts an alignment marker that enables the receiver 3 to detect the skew for each virtual lane in the data string of the transmission data.

  The multiplexer unit 17 multiplexes the transmission data input from the p marker insertion units (15-1 to 15-p) into the number of transmission lanes (x) in the transmission path, and the multiplexed transmission data. Output to the first transmission line. In the present embodiment, x is n.

  Next, an example of the alignment marker inserted in the marker insertion unit 15 will be described.

  In the present embodiment, a 66-bit fixed pattern is defined as the alignment marker to be inserted, and the marker insertion unit (15-1 to 15-p) inserts the alignment marker into the data string at regular intervals. Of the 66 bits of the alignment marker, 2 bits are header information, 32 bits are alignment information, and the remaining 32 bits are inverted values of the alignment information. The breakdown of the alignment information (32 bits) includes 5 bits indicating the virtual lane number, 5 bits indicating the transmission capacity (the number of virtual lanes to be used), and 1 bit indicating the failure notification.

  FIG. 4 is a block diagram illustrating the repeater 2 according to the first embodiment of this invention.

  The repeater 2 receives a data string from a transmission path constituted by x transmission lanes, and outputs the data string to a transmission path constituted by y transmission lanes. In this embodiment, since the first transmission path is composed of n transmission lanes and the second transmission path is composed of m transmission lanes, x = n and y = m.

  The repeater 2 includes x signal detection units (20-1 to 20-x), a signal monitoring unit 21, a demultiplexer unit 22, p block synchronization units (23-1 to 23-p), and a synchronization monitoring unit. 24, a failure management unit 25, p failure notification insertion units (26-1 to 26-p), and a multiplexer unit 27.

  First, the data flow of the repeater 2 will be described.

  The transmission data string transmitted from the transmitter 1 is input to a plurality of signal detection units (20-1 to 20-x) provided in the relay device 2 via the first transmission path.

  The signal detection units (20-1 to 20-x) output data strings to the signal monitoring unit 21 and the demultiplexer unit 22, respectively. The demultiplexer unit 22 outputs data strings from the p output units included in the demultiplexer unit 22 to p block synchronization units (23-1 to 23-p), respectively.

  The block synchronization units (23-1 to 23-p) output data strings to the synchronization monitoring unit 24 and the failure notification insertion units (26-1 to 26-p), respectively. The synchronization monitoring unit 24 outputs the data string to the failure management unit 25.

  The failure management unit 25 outputs data strings from the p output units included in the failure management unit 25 to the failure notification insertion units (26-1 to 26-p), respectively. Each of the failure notification insertion units (26-1 to 26-p) outputs a data string to the multiplexer unit 27. The multiplexer unit 27 outputs a data string from the y output units included in the multiplexer unit 27 to the second transmission path.

  Next, the operation of the repeater 2 will be described in detail.

  The transmission data string transmitted from the transmitter 1 is input to a plurality of signal detection units (20-1 to 20-x) provided in the relay device 2 via the first transmission path.

  The signal detection units (20-1 to 20-x) execute a clock synchronization process on the data sequence and output the received data sequence to the demultiplexer unit 22. The signal detection unit (20-1 to 20-x) further detects a data signal input and notifies the signal monitoring unit 21 of the detection result.

  The signal monitoring unit 21 monitors the detection results notified from the signal detection units (20-1 to 20-x), and notifies the failure management unit 25 of a failure that has occurred in each transmission lane of the first transmission path. The demultiplexer unit 22 receives a data string from the signal detectors (20-1 to 20-x), separates the input data string into p virtual lanes, and blocks the separated data string to a block synchronization unit (23-1 to 23-p).

  The block synchronization unit (23-1 to 23-p) synchronizes with the code block of the transmission data encoded by the transmission encoding unit 13 of the transmitter 1, aligns the code block for each virtual lane, and performs alignment. The code block data string is output to the failure notification insertion unit (26-1 to 26-p). Further, the block synchronization unit (23-1 to 23-p) notifies the synchronization monitoring unit 24 of the block synchronization status.

  The synchronization monitoring unit 24 monitors the code block synchronization result notified from the block synchronization unit (23-1 to 23-p), and notifies the failure management unit 25 of a failure occurring in each virtual lane of the first transmission path. .

  For example, the synchronization monitoring unit 24 monitors a bit string indicating the head position of a code block included in a data string output from each virtual lane. If the bit string is not received correctly, a failure has occurred in the virtual lane. Is determined. That is, the data string output from the virtual lane includes a bit string for synchronization, and when the above-described bit string is not received at a predetermined time interval, it is determined that a failure has occurred in the virtual lane.

  Based on the failure for each transmission lane notified from the signal monitoring unit 21 and the block synchronization failure for each virtual lane notified from the synchronization monitoring unit 24, the failure management unit 25 determines in which virtual lane the failure has occurred. Is determined, the corresponding virtual lane is set as the failure lane, and the determination result is notified to the failure notification insertion unit (26-1 to 26-p).

  The failure notification insertion unit (26-1 to 26-p) notifies the input data string that a failure has occurred in the virtual lane at the receiver 3, and therefore the marker insertion unit (15- The failure notification information is inserted into the part of the alignment marker inserted in 1-15-p). In this embodiment, a unique 66-bit fixed value (p type corresponding to a virtual lane) that is different from the p type alignment markers inserted by the marker insertion unit (15-1 to 15-p) of the transmitter 1 is used. The failure notification insertion unit (26-1 to 26-p) defines the alignment marker when a failure occurs, and inserts the alignment marker only in the virtual lane where the failure has occurred.

  The multiplexer unit 27 multiplexes the data sequence input from the p fault notification insertion units (26-1 to 26-p) into the number of transmission lanes (y) in the transmission path, and the multiplexed data sequence Is output to the second transmission line. In the present embodiment, y is m.

  FIG. 5 is a block diagram illustrating the receiver 3 according to the first embodiment of this invention.

  The receiver 3 receives a data string from a transmission path (or final transmission path) constituted by x transmission lanes, and outputs received frame data (hereinafter, received data) and use lane information.

  The receiver 3 includes a signal detection unit (40-1 to 40-x), a signal monitoring unit 41, a demultiplexer unit 42, a block synchronization unit (43-1 to 43-p), a synchronization monitoring unit 44, and a failure notification detection unit. (49-1 to 49-p), failure notification monitoring unit 50, use lane determination unit 51, marker inspection unit (52-1 to 52-p), capacity determination unit 53, phase difference detection unit 54, deskew unit 55, A marker deletion unit 56, a transmission decoding unit 57, and a capacity conversion unit 58 are provided.

  First, the data flow of the receiver 3 will be described.

  Data strings output from the repeater 2 via the second transmission path are respectively input to the signal detection units (40-1 to 40-x). The signal detection units (40-1 to 40-x) output the data string to the demultiplexer unit 42 and the signal monitoring unit 41. The signal monitoring unit 41 outputs the data string to the use lane determining unit 51.

  The demultiplexer unit 42 outputs a data string from the p output units included in the demultiplexer unit 42 to the p block synchronization units (43-1 to 43-p), respectively. The block synchronization units (43-1 to 43-p) are respectively a synchronization monitoring unit 44, a failure notification detection unit (49-1 to 49-p), a marker inspection unit (52-1 to 52-p), A data string is output to the deskew unit 55. The synchronization monitoring unit 44 outputs the data string to the use lane determining unit 51.

  The failure notification detection units (49-1 to 49-p) each output a data string to the failure notification monitoring unit 50. The failure notification monitoring unit 50 outputs the data string to the use lane determining unit 51. The use lane determination unit 51 outputs a data string to the transmitter 1. The marker inspection unit (52-1 to 52-p) outputs a data string to the capacity determination unit 53 and the phase difference detection unit 54.

  The capacity determination unit 53 outputs the data string to the capacity conversion unit 58. The phase difference detection unit 54 outputs the data string to the deskew unit 55. The deskew unit 55 outputs a data string to the marker deletion unit 56 via the p virtual lanes included in the deskew unit 55. The marker deletion unit 56 outputs the data string to the transmission decoding unit 57. The transmission decoding unit 57 outputs the data string to the capacity conversion unit 58. The capacity converter 58 finally outputs the received data.

  Next, the operation of the receiver 3 will be described in detail.

  The transmission data string transmitted from the repeater 2 is input to a plurality of signal detection units (20-1 to 20-x) provided in the receiver 3 via the second transmission path.

  The signal detection units (40-1 to 40-x) execute clock synchronization processing of the data sequence, and output the received data sequence to the demultiplexer unit. The signal detection units (40-1 to 40-x) further detect the data signal input and notify the signal monitoring unit 41 of the detection result.

  The signal monitoring unit 41 monitors the detection results notified from the signal detection units (40-1 to 40-x), and notifies the use lane determination unit 51 of a failure that has occurred in each transmission lane of the second transmission path. The demultiplexer unit 42 receives data strings from the signal detectors (40-1 to 40-x), separates the input data strings into p virtual lanes, and blocks the separated data strings (43-1 to 43-p).

  The block synchronization units (43-1 to 43-p) are synchronized with the code blocks of the transmission data encoded by the transmission encoding unit 13 of the transmitter 1, and the code blocks are aligned and aligned for each virtual lane. The data sequence of the code block is output to the failure notification detection unit (49-1 to 49-p), the marker inspection unit (52-1 to 52-p), and the deskew unit 55, respectively. Furthermore, the block synchronization unit (43-1 to 43-p) notifies the synchronization monitoring unit 44 of the state of the block synchronization result.

  The synchronization monitoring unit 44 monitors the code block synchronization result notified from the block synchronization unit (43-1 to 43-p), and notifies the use lane determination unit 51 of a failure occurring in each virtual lane of the second transmission path. To do.

  For example, the synchronization monitoring unit 24 monitors a bit string indicating the head position of a code block included in a data string output from each virtual lane. If the bit string is not received correctly, a failure has occurred in the virtual lane. Is determined. That is, the data string output from the virtual lane includes a bit string for synchronization, and when the above-described bit string is not received at a predetermined time interval, it is determined that a failure has occurred in the virtual lane.

  The signal monitoring unit 41 and the synchronization monitoring unit 44 detect a failure in the transmission path (physical lane or virtual lane) between the repeater 2 and the receiver 3.

  The failure notification detection units (49-1 to 49-p) detect the failure information of the virtual lanes inserted by the failure notification insertion unit 26 of the repeater 2, and notify the failure notification monitoring unit 50 of the detection results. .

  The failure notification monitoring unit 50 monitors the failure notification information notified from the failure notification detection unit (49-1 to 49-p), and notifies the use lane determination unit 51 of a failure occurring in the virtual lane of the transmission path. The failure notification monitoring unit 50 detects a failure in the transmission path (physical lane or virtual lane) between the transmitter 1 and the repeater 2.

  The used lane determining unit 51 monitors a lane failure based on information notified from one or a plurality of monitoring units, and determines a usable virtual lane. The used lane determining unit 51 transmits used lane information indicating the virtual lane to be used to the transmitter 1.

  The marker inspection unit (52-1 to 52-p) inspects the alignment marker, extracts the transmission capacity information inserted by the marker insertion unit (15-1 to 15-p) of the transmitter 1, and is extracted. The transmission capacity information is notified to the capacity determination unit 53. Further, the marker inspection unit (52-1 to 52-p) notifies the phase difference detection unit 54 of the virtual lane number and the detection timing.

  The capacity determination unit 53 monitors the transmission capacity information notified from the marker inspection unit (52-1 to 52-p), detects that the transmission capacity has been changed in the transmitter 1, and the transmitter 1 The number of virtual lanes used, that is, the transmission capacity is determined, and information on the transmission capacity is notified to the capacity conversion unit 58.

  The phase difference detection unit 54, based on the virtual lane number and the detection timing notified from the marker inspection unit (52-1 to 52-p), the phase difference between the virtual lanes, that is, the skew amount and the reception position of the virtual lane. Is identified and notified to the deskew unit 55.

  The deskew unit 55 corrects the arrival time difference for each virtual lane and the received position shift based on the skew amount notified from the phase difference detection unit 54 and the received position of the virtual lane, and sends it to the marker deletion unit 56. Output the received data string in the correct virtual lane order. The marker deletion unit 56 deletes the alignment marker inserted in the data sequence by the marker insertion unit (15-1 to 15-p) of the transmitter 1 and outputs the received data sequence to the transmission decoding unit 57.

  The transmission decoding unit 57 decodes the data sequence transmission-encoded by the transmission encoding unit 13 of the transmitter 1 into the original data sequence, and outputs the received data sequence to the capacity conversion unit 58. The capacity converting unit 58 combines means for combining data strings transmitted through the virtual lanes in use according to the transmission capacity determined by the capacity determining unit 53 and increasing the interval of invalid signals between data frames. The received frame data is output after being converted into a data string of the maximum transmission capacity of the transmission path.

  Next, an operation example related to the determination of the fault lane will be described.

  The signal detection unit (40-1 to 40-x) detects a signal state such as no signal is detected or the signal intensity is weaker than a certain value, and notifies the signal monitoring unit 41 of the signal state.

  The block synchronization units (43-1 to 43-p) notify the synchronization monitoring unit 44 of information such as that the code block synchronization is not completed or the synchronization is lost.

  The failure notification detection unit (49-1 to 49-p) detects from the failure notification information included in the alignment marker that a failure has occurred in the virtual lane in the transmission path before the repeater 2, and notifies the failure notification. Notify the monitoring unit 50.

  The use lane determination unit 51 receives the result of the fault monitoring from the signal monitoring unit 41, the synchronization monitoring unit 44, and the fault notification monitoring unit 50, and when it is determined that there is a virtual lane whose reliability is significantly reduced, Use lane information including information indicating that the lane is not used is notified to the transmitter 1.

  Specifically, the use lane determination unit 51 is in a state in which the signal intensity (for example, voltage) output from the physical lane is equal to or less than a preset threshold based on the result of failure monitoring from the signal monitoring unit 41. Is continued for a predetermined time, the physical lane is determined to be unusable.

  Further, when the 64B / 66B code is used, the use lane determination unit 51 determines that, for example, a bit string having a header indicating an error from a virtual lane has a predetermined time based on a failure monitoring result from the synchronization monitoring unit 44. When the error rate is continuously input and the error rate becomes higher than a preset threshold value, the block synchronization is removed and the virtual lane is determined to be unusable. The use lane determination unit 51 also determines that the virtual lane is unusable when the number of block synchronization loss in the virtual lane is greater than a preset value.

  Further, the use lane determination unit 51 determines that the virtual lane in which the failure information is detected is unusable based on the result of the failure monitoring from the failure notification monitoring unit 50.

  Based on the above determination results, the use lane determination unit 51 obtains information on the virtual lanes excluding the virtual lane determined to be unusable and the virtual lane that outputs the data string to the physical lane determined to be unusable. Generate usage lane notifications that contain. The generated use lane notification is transmitted to the transmitter. The transmitter 1 can avoid the use of a physical lane in which a failure has occurred, based on information on available virtual lanes included in the use lane notification.

  According to the first embodiment, even if a failure occurs in each transmission lane of the first transmission path and the second transmission path, the normal link lane is used and the communication capacity is reduced, so that the entire link Connection can be maintained.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in a method for transmitting a failure occurring in a virtual lane to the receiver 3. Moreover, since the transmitter 1 of the second embodiment is the same as the transmitter 1 of the first embodiment, the description thereof is omitted. Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 6 is a block diagram illustrating the repeater 2 according to the second embodiment of this invention.

  The repeater 2 according to the second embodiment includes x signal detection units (20-1 to 20-x), a signal monitoring unit 21, a demultiplexer unit 22, and p block synchronization units (23-1 to 23-). p), a synchronization monitoring unit 24, a failure management unit 25, a PRBS generation unit 28, p selector units (29-1 to 29-p), and a multiplexer unit 27.

  The repeater 2 of the second embodiment is different from the first embodiment in that it includes a PRBS generation unit 28 and p selector units (29-1 to 29-p).

  First, the data flow of the repeater 2 of 2nd embodiment is demonstrated.

  The transmission data string transmitted from the transmitter 1 is input to a plurality of signal detection units (20-1 to 20-x) provided in the relay device 2 via the first transmission path.

  The signal detection units (20-1 to 20-x) output data strings to the signal monitoring unit 21 and the demultiplexer unit 22, respectively. The demultiplexer unit 22 outputs data strings from the p output units included in the demultiplexer unit 22 to p block synchronization units (23-1 to 23-p), respectively.

  The block synchronization units (23-1 to 23-p) output data strings to the synchronization monitoring unit 24 and the p selector units (29-1 to 29-p), respectively. The synchronization monitoring unit 24 outputs the data string to the failure management unit 25. The PRBS generation unit 28 outputs the data string to the p selector units (29-1 to 29-p). The failure management unit 25 outputs a data string from the p output units included in the failure management unit 25 to p selector units (29-1 to 29-p), respectively. Each of the p selector units (29-1 to 29-p) outputs a data string to the multiplexer unit 27. The multiplexer unit 27 outputs a data string from the y output units included in the multiplexer unit 27 to the second transmission path.

  Next, operation | movement of the relay machine 2 of 2nd embodiment is demonstrated. Note that the x signal detection units (20-1 to 20-x), the signal monitoring unit 21, the demultiplexer unit 22, and the p block synchronization units (23-1 to 23-1) included in the repeater 2 of the second embodiment. 23-p) and the operation of the synchronization monitoring unit 24 are the same as those in the first embodiment, and thus the description of the parts is omitted.

  The PRBS generation unit 28 generates a random bit string in which DC balance and finite run length are guaranteed, and outputs the bit string to p selector units (29-1 to 29-p). Thereby, it is possible to avoid malfunction of the receiver 3 to which the data string from the virtual lane where the failure has occurred is input. Further, when the receiver 3 detects a specific random bit string, it can be detected that a failure has occurred in the virtual lane. The operation in which the receiver 3 detects a fault in the virtual lane will be described later with reference to FIG.

  Here, the random bit string in which the DC balance and the finite run length are guaranteed is included in the data string received at a predetermined time interval in the case of a bit string composed of “0” and “1”, for example. The bit strings are such that the numbers “0” and “1” are the same.

  Based on the failure for each transmission lane notified from the signal monitoring unit 21 and the block synchronization failure for each virtual lane notified from the synchronization monitoring unit 24, the failure management unit 25 determines in which virtual lane the failure has occurred. And the failure information (normal / abnormal state) of the lane is notified to the selector unit (29-1 to 29-p) using the corresponding virtual lane as the failure lane.

  Based on the lane failure information notified from the failure management unit 25, each of the p selector units (29-1 to 29-p) is a block synchronization unit (23-1 to 23) if the lane is in a normal state. If the lane is in an abnormal state, the random bit string input from the PRBS generation unit 28 is selected from the data sequence input from -p) and output to the multiplexer unit 27.

  The multiplexer unit 27 multiplexes the data sequence input from the p selector units (29-1 to 29-p) into the number of transmission lanes (y) in the transmission path, and the multiplexed data sequence is Output to 2 transmission lines. In the present embodiment, y is m.

  FIG. 7 is a block diagram of the receiver 3 according to the second embodiment of this invention.

  The receiver 3 of the second embodiment receives a second transmission path (or final transmission path) composed of x transmission lanes as input, and outputs received frame data (hereinafter referred to as reception data) and use lane information. To do.

  The receiver 3 includes a signal detection unit (40-1 to 40-x), a signal monitoring unit 41, a demultiplexer unit 42, a block synchronization unit (43-1 to 43-p), a synchronization monitoring unit 44, a PRBS inspection unit ( 47-1 to 47-p), PRBS monitoring unit 48, use lane determination unit 51, marker inspection unit (52-1 to 52-p), capacity determination unit 53, phase difference detection unit 54, deskew unit 55, marker deletion Unit 56, transmission decoding unit 57, and capacity conversion unit 58.

  The receiver 3 of the second embodiment is different from the first embodiment in that the receiver 3 includes a PRBS inspection unit (47-1 to 47-p) and a PRBS monitoring unit 48.

  First, the data flow of the receiver 3 will be described.

  The data output from the repeater 2 via the second transmission path is input to the signal detection units (40-1 to 40-x), respectively. The signal detection units (40-1 to 40-x) output the data string to the demultiplexer unit 42 and the signal monitoring unit 41. The signal monitoring unit 41 outputs the data string to the use lane determining unit 51.

  The demultiplexer unit 42 outputs a data string from the p output units included in the demultiplexer unit 42 to the p block synchronization units (43-1 to 43-p), respectively. The block synchronizers (43-1 to 43-p) include a synchronization monitor unit 44, a PRBS inspection unit (47-1 to 47-p), a marker inspection unit (52-1 to 52-p), and a deskew. The data string is output to the unit 55. The synchronization monitoring unit 44 outputs the data string to the use lane determining unit 51.

  Each of the PRBS inspection units (47-1 to 47-p) outputs a data string to the PRBS monitoring unit 48. The PRBS monitoring unit 48 outputs the data string to the use lane determining unit 51.

  The use lane determination unit 51 outputs a data string to the transmitter 1. The marker inspection unit (52-1 to 52-p) outputs a data string to the capacity determination unit 53 and the phase difference detection unit 54.

  The capacity determination unit 53 outputs the data string to the capacity conversion unit 58. The phase difference detection unit 54 outputs the data string to the deskew unit 55. The deskew unit 55 outputs a data string to the marker deletion unit 56 via the p virtual lanes included in the deskew unit 55. The marker deletion unit 56 outputs the data string to the transmission decoding unit 57. The transmission decoding unit 57 outputs the data string to the capacity conversion unit 58. The capacity converter 58 finally outputs the received data.

  Next, the operation of the receiver 3 of the second embodiment will be described. In addition, the signal detection part (40-1 to 40-x) with which the receiver 3 of 2nd embodiment is provided, the signal monitoring part 41, the demultiplexer part 42, the synchronous monitoring part 44, the use lane determination part 51, a marker test | inspection part (52-1 to 52-p), operations of the capacity determination unit 53, the phase difference detection unit 54, the deskew unit 55, the marker deletion unit 56, the transmission decoding unit 57, and the capacity conversion unit 58 are the first embodiment. Therefore, the description about the part is omitted.

  The block synchronization units (43-1 to 43-p) are synchronized with the code blocks of the transmission data encoded by the transmission encoding unit 13 of the transmitter 1, and the code blocks are aligned and aligned for each virtual lane. The data sequence of the code block is output to the PRBS inspection unit (47-1 to 47-p), the marker inspection unit (52-1 to 52-p), and the deskew unit 55, respectively. Further, the block synchronization unit (43-1 to 43-p) notifies the synchronization monitoring unit 44 of the block synchronization result.

  The PRBS checking units (47-1 to 47-p) detect the random bit sequences inserted by the PRBS generating unit 28 and the p selector units (29-1 to 29-p) of the relay unit 2, respectively. The PRBS monitoring unit 48 is notified of the detection result.

  The PRBS monitoring unit 48 monitors the random bit string detection result notified from the PRBS checking unit (47-1 to 47-p), and when a random bit string is detected, a failure occurs in the virtual lane of the transmission path. The use lane determination unit 51 is notified of the determination result.

  The use lane determination unit 51 determines that a virtual lane that outputs a random bit string cannot be used. In addition, since the use lane determination method in the use lane determination part 51 based on the result of the fault monitoring from the signal monitoring part 41 and the synchronous monitoring part 44 is the same as 1st embodiment, description is abbreviate | omitted.

  In the second embodiment, a random bit string is used for detecting a fault in a virtual lane. However, the present invention is not limited to this, and any bit string that can detect a fault may be used.

  According to the second embodiment of the present invention, by using a random bit string in which DC balance and finite run length are guaranteed, malfunction in the receiver 3 is avoided, and the receiver 3 The generated virtual lane can be detected.

[Third embodiment]
A third embodiment of the present invention will be described with reference to FIGS. The third embodiment is different from the first embodiment in a method for detecting a failure occurring in a virtual lane. Hereinafter, the third embodiment will be described focusing on differences from the first embodiment.

  FIG. 8 is a block diagram illustrating the transmitter 1 according to the third embodiment of this invention.

  The transmitter 1 includes a frame buffer 10, a capacity conversion unit 12, a transmission encoding unit 13, a round robin unit 14, a marker insertion unit 15 (15-1 to 15-p), and an error correction encoding unit (16-1 to 16). -P), and a multiplexer unit 17.

  The transmitter 1 of the third embodiment is provided with an error correction coding unit (16-1 to 16-p) between the marker insertion unit (15-1 to 15-p) and the multiplexer unit 17. Different from the first embodiment.

  Regarding the data flow of the error correction encoding unit (16-1 to 16-p), the error correction encoding unit (16-1 to 16-p) receives data from the marker insertion unit (15-1 to 15-p). The column is input, and the data column is output to the multiplexer unit 17.

  As for the operation of the error correction coding unit (16-1 to 16-p), the error correction coding unit (16-1 to 16-p) is changed from the marker insertion unit (15-1 to 15-p). Error correction parity data is calculated from the error correction code generation polynomial for the input data string. Further, the error correction encoding unit (16-1 to 16-p) inserts the calculated error correction parity data into the input data string, and outputs the data string to the multiplexer unit 17.

  Since other data flows and detailed operations of each part are the same as those of the transmitter 1 of the first embodiment, the description thereof is omitted.

  FIG. 9 is a block diagram illustrating the repeater 2 according to the third embodiment of this invention.

  The repeater 2 includes x signal detection units (20-1 to 20-x), a signal monitoring unit 21, a demultiplexer unit 22, p block synchronization units (23-1 to 23-p), and a synchronization monitoring unit. 24, p error detection units (30-1 to 30-p), error monitoring unit 31, failure management unit 25 ′, p failure notification insertion units (26-1 to 26-p), and multiplexer unit 27 Is provided.

  The repeater 2 of the third embodiment includes an error monitoring unit 31 and p number of blocks between the block synchronization unit (23-1 to 23-p) and the failure notification insertion unit (26-1 to 26-p). The point provided with an error detection part (30-1-30-p) differs from 1st embodiment.

  Further, the point that the error monitoring unit 31 outputs the data string input from the p error detection units (30-1 to 30-p) to the failure management unit 25 ′ is also different from the first embodiment.

  The p error detection units (30-1 to 30-p) of the repeater 2 according to the third embodiment are inserted by the error correction coding units (16-1 to 16-p) of the transmitter 1. Using the correction parity data, an error in the transmitted data string is detected, and the detection result is notified to the error monitoring unit 31.

  The error monitoring unit 31 calculates an error rate for each virtual lane based on the error detection result notified from the error detection unit (30-1 to 30-p), and notifies the failure management unit 25 ′ of the error rate. To do.

  The failure management unit 25 ′ has a failure for each transmission lane notified from the signal monitoring unit 21, a block synchronization failure for each virtual lane notified from the synchronization monitoring unit 24, and a virtual lane notified from the error monitoring unit 31. Based on the error rate, it is determined in which virtual lane a failure has occurred, the corresponding virtual lane is determined as a failure lane, and the determination result is notified to the failure notification insertion unit (26-1 to 26-p).

  Since other data flows and detailed operations of each part are the same as those of the repeater 2 of the first embodiment, description thereof is omitted.

  FIG. 10 is a block diagram illustrating the receiver 3 according to the third embodiment of this invention.

  The receiver 3 includes a signal detection unit (40-1 to 40-x), a signal monitoring unit 41, a demultiplexer unit 42, a block synchronization unit (43-1 to 43-p), a synchronization monitoring unit 44, and p errors. Detection unit (45-1 to 45-p), error monitoring unit 46, failure notification detection unit (49-1 to 49-p), failure notification monitoring unit 50, use lane determination unit 51, marker inspection unit (52-1) 52-p), a capacity determination unit 53, a phase difference detection unit 54, a deskew unit 55, a marker deletion unit 56, a transmission decoding unit 57, and a capacity conversion unit 58.

  The receiver 3 of the third embodiment includes p error detection units (45-1 to 45-p) between the block synchronization unit (43-1 to 43-p) and the deskew unit 55. The error monitoring unit 46 is different from the first embodiment in that the error monitoring unit 46 outputs the data string input from the p error detection units (45-1 to 45-p) to the use lane determination unit 51.

  The p error detection units (45-1 to 45-p) were transmitted using the error correction parity data inserted by the error correction coding units (16-1 to 16-p) of the transmitter 1. An error in the data string is detected, and the detection result is notified to the error monitoring unit 46.

  The error monitoring unit 46 calculates an error rate for each virtual lane based on the error detection result notified from the error detection unit (45-1 to 45-p), and sends the error rate to the use lane determination unit 51. Notice.

  Based on the error rate notified from the error monitoring unit 46, the use lane determination unit 51 determines that a failure has occurred in the virtual lane, for example, when the error rate is equal to or higher than a preset threshold, and the virtual lane Determine that the lane is unusable.

  Further, based on the error rate notified from the error monitoring unit 46, the use lane determining unit 51 determines that the virtual lane has a failure when the rate of increase in the error rate at an arbitrary time interval is equal to or greater than a preset threshold value. A method of determining that the virtual lane has occurred and determining that the virtual lane cannot be used is also conceivable.

  The use lane determination method in the use lane determination unit 51 based on the failure monitoring results from the signal monitoring unit 41, the synchronization monitoring unit 44, and the failure notification monitoring unit 50 is the same as that in the first embodiment. Is omitted.

  The reason for using the error detection unit (30-1 to 30-p) is that it takes time until the block synchronization is lost in detecting the occurrence of a failure using the block synchronization unit (23-1 to 23-p). In some cases, a virtual lane in which a failure has occurred can not be handled quickly. On the other hand, in the detection of the failure occurrence using the error detection units (30-1 to 30-p), it is possible to cope with the failure before the failure occurs in the virtual lane by monitoring the error rate. Therefore, in the third embodiment, it is possible to detect an accurate failure occurrence.

  The used lane determining method in the used lane determining unit 51 based on the results of the failure monitoring from the signal monitoring unit 41, the synchronization monitoring unit 44, and the failure notification monitoring unit 50 is the same as that in the first embodiment, and thus description thereof is omitted. To do.

  According to the third embodiment, the occurrence of a failure in a virtual lane can be accurately detected, and the failure can be quickly dealt with.

[Fourth embodiment]
A fourth embodiment of the present invention will be described with reference to FIGS. The fourth embodiment is a combination of the second embodiment and the third embodiment. Moreover, since the transmitter 1 of the fourth embodiment is the same as the transmitter 1 of the third embodiment, the description thereof is omitted.

  FIG. 11 is a block diagram of the repeater 2 according to the fourth embodiment of the present invention. The repeater 2 includes x signal detection units (20-1 to 20-x), a signal monitoring unit 21, a demultiplexer unit 22, p block synchronization units (23-1 to 23-p), and a synchronization monitoring unit. 24, p error detection units (30-1 to 30-p), error monitoring unit 31, failure management unit 25 ′, PRBS generation unit 28, p selector units (29-1 to 29-p), multiplexer The unit 27 is provided.

  FIG. 12 is a block diagram of the receiver 3 according to the fourth embodiment of this invention. The receiver 3 includes a signal detection unit (40-1 to 40-x), a signal monitoring unit 41, a demultiplexer unit 42, a block synchronization unit (43-1 to 43-p), a synchronization monitoring unit 44, and p number of units. Error detection unit (45-1 to 45-p), error monitoring unit 46, PRBS inspection unit (47-1 to 47-p), PRBS monitoring unit 48, use lane determination unit 51, marker inspection unit (52-1 to 52-1) 52-p), a capacity determination unit 53, a phase difference detection unit 54, a deskew unit 55, a marker deletion unit 56, a transmission decoding unit 57, and a capacity conversion unit 58.

  The following are typical examples of aspects of the present invention other than those described in the claims.

(1) A transmitter that transmits transmission data to a receiver, a relay that receives the transmission data from the transmitter, and transfers the received transmission data to the receiver; and the transmission data that is received from the relay A transmission system comprising a receiver that
The transmitter and a relay that receives transmission data from the transmitter are connected by a first transmission path, and the relay that transmits the transmission data to the receiver and the receiver are connected by a second transmission path,
The first transmission path is configured by bundling a first number of transmission lanes,
The second transmission path is configured by bundling a second number of transmission lanes,
The transmitter, the repeater, and the receiver comprise a number of virtual lanes that can be multiplexed into the first number of transmission lanes and the second number of transmission lanes;
The transmitter is
Dividing the transmission data into a data string of the number of usable virtual lanes based on the used lane information transmitted from the receiver and including information on the usable virtual lanes;
Inserting identification information for identifying the virtual lane from which the data string is output and the usable lane information into the data string output from the virtual lane,
Multiplex the data string output from the virtual lane based on the number of transmission lanes of the first transmission path,
Transmitting the transmission data to the repeater by outputting the multiplexed data sequence from each transmission lane constituting the first transmission path to the repeater;
The repeater is
Receiving the multiplexed data sequence from transmission lanes constituting the first transmission path;
Based on the usable lane information inserted into the received data string, the received data string is divided into data strings of the number of usable virtual lanes,
Monitor each transmission lane of the first transmission path and the failure of each virtual lane,
Insert failure notification information into the data string output from the virtual lane where the failure occurs,
Multiplexing the data string output from the virtual lane based on the number of transmission lanes of the second transmission path,
The transmission data is transmitted to the receiver or the other relay by outputting the multiplexed data string from each transmission lane constituting the second transmission path to the receiver or the other relay. And
The receiver
Receiving the multiplexed data sequence from transmission lanes constituting the second transmission path;
Based on the usable lane information inserted into the received data string, the received data string is divided into data strings of the number of usable virtual lanes,
Detecting the identification information from the received data string;
Monitor each transmission lane of the second transmission path and the failure of each virtual lane,
Based on the failure monitoring result of the transmission lane, determine the failure lane,
Based on the failure notification information and the determination result, determine the usable virtual lane,
Transmitting use lane information including information on the determined available virtual lanes to the transmitter;
Based on the detected identification information, correct the arrival sequence shift of the received data sequence and the reception position shift in the virtual lane caused by the arrival time difference of the data sequence between the transmission lanes,
A transmission system, wherein the divided data string is restored to the transmission data.

(2) The repeater is
Monitoring the signal of the data string output from each transmission lane of the first transmission path;
Determining the transmission lane of the first transmission line that outputs a data string whose signal strength of the data string is equal to or lower than a preset threshold value as the fault lane;
Monitoring the synchronization of the data string output from the virtual lane;
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
Inserting a data string indicating the failure lane into the data string transmitted from the virtual lane determined as the failure lane as the failure notification information,
The receiver detects a failure lane of the first transmission path, the second transmission path, and the virtual lane by monitoring whether or not the failure notification information is inserted ( The transmission system according to 1).

(3) The receiver
Monitoring the signal of the data string output from each transmission lane of the second transmission path;
Determining the transmission lane of the second transmission line that outputs a data string whose signal strength of the data string is equal to or less than a preset threshold value as the failure lane;
Monitoring the synchronization of the data string output from the virtual lane,
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
Monitor the data string output from the virtual lane,
A virtual lane that outputs a data string into which a data string indicating that it is the failed lane is determined as the failed lane,
When determining the usable virtual lane, based on the determination result, determine the usable virtual lane so that the failed lane is not used,
Generating the available lane information including information on the determined available virtual lanes;
The transmission system according to (2), wherein the generated usable lane information is transmitted to the transmitter.

  (4) The transmission system according to (2), wherein the repeater uses a DC-balanced data string as a data string indicating the failure lane.

(5) The transmitter
Based on the data string output from each virtual lane, error correction parity is calculated,
Inserting the calculated error parity into the data string output from the virtual lane;
The repeater is
Monitoring the signal of the data string output from each transmission lane of the first transmission path;
Determining the transmission lane of the first transmission line that outputs a data string whose signal strength of the data string is equal to or lower than a preset threshold value as the fault lane;
Based on the error correction parity inserted in the data string output from the first transmission path, the error rate of each virtual lane is calculated,
Determining the failed lane in the virtual lane based on the calculated error rate;
Monitoring the synchronization of the data string output from the virtual lane;
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
Inserting a data string indicating the failure lane into the data string transmitted from the virtual lane determined as the failure lane as the failure notification information,
The receiver detects a failure lane of the first transmission path, the second transmission path, and the virtual lane by monitoring whether or not the failure notification information is inserted ( The transmission system according to 1).

(6) The receiver
Monitoring the signal of the data string output from each transmission lane of the second transmission path;
Determining a transmission lane of the second transmission line that outputs a data string whose signal strength of the data string is not more than a preset threshold value as a fault lane;
Monitoring the synchronization of the data string output from the virtual lane,
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
Based on the error correction parity inserted in the data string output from the virtual lane, the error rate of the virtual lane is calculated,
Determining the failed lane in the virtual lane based on the calculated error rate;
A virtual lane that outputs a data string into which a data string indicating that it is the failed lane is determined as the failed lane,
When determining the usable virtual lane, based on the determination result, determine the usable virtual lane so that the failed lane is not used,
Generating the available lane information including information on the determined available virtual lanes;
The transmission system according to (5), wherein the generated usable lane information is transmitted to the transmitter.

  (7) The determination of the fault lane in the virtual lane based on the calculated error rate may be performed by outputting the data lane in which the calculated error rate is equal to or higher than a preset threshold, or the The transmission according to (5) or (6), wherein the virtual lane that outputs a data string in which the calculated error rate increase rate is equal to or higher than a preset threshold is determined as the failure lane. system.

(8) Provided in a transmission system including a transmitter that transmits transmission data to a receiver and a receiver that receives the transmission data, receives the transmission data from the transmitter, and receives the received transmission data A relay that forwards to the machine,
The transmitter and a relay that receives transmission data from the transmitter are connected by a first transmission path, and the relay that transmits the transmission data to the receiver and the receiver are connected by a second transmission path,
The first transmission path is configured by bundling a first number of transmission lanes,
The second transmission path is configured by bundling a second number of transmission lanes,
The transmitter, the repeater, and the receiver comprise a number of virtual lanes that can be multiplexed into the first number of transmission lanes and the second number of transmission lanes;
The repeater is
Receiving a multiplexed data string from transmission lanes constituting the first transmission path;
The received data string is divided into a data string of the number of usable virtual lanes based on usable lane information inserted into the data string transmitted from the transmitter and including information on the usable virtual lanes. ,
Monitor each transmission lane of the first transmission path and the failure of each virtual lane,
Insert failure notification information into the data string output from the virtual lane where the failure occurs,
Multiplex the data string output from the virtual lane based on the number of transmission lanes of the second transmission path,
The transmission data is transmitted to the receiver or the other relay by outputting the multiplexed data string from each transmission lane constituting the second transmission path to the receiver or the other relay. A repeater characterized by

(9) monitoring the signal of the data string output from each transmission lane of the first transmission path;
Determining the transmission lane of the first transmission line that outputs a data string whose signal strength of the data string is equal to or less than a preset threshold as a fault lane;
Monitoring the synchronization of the data string output from the virtual lane;
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
(8) The repeater according to (8), wherein a data string indicating the failure lane is inserted as the failure notification information into a data string transmitted from the virtual lane determined as the failure lane.

  (10) The repeater according to (9), wherein a DC balanced data string is used as the data string indicating the fault lane.

(11) monitoring a signal of a data string output from each transmission lane of the first transmission path;
Determining the transmission lane of the first transmission line that outputs a data string whose signal strength of the data string is equal to or lower than a preset threshold value as the fault lane;
The error rate of each virtual lane is calculated based on the error correction parity that is inserted into the data string output from the first transmission path and calculated by the transmitter,
Determining the failed lane in the virtual lane based on the calculated error rate;
Monitoring the synchronization of the data string output from the virtual lane;
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
(8) The repeater according to (8), wherein a data string indicating the failure lane is inserted as the failure notification information into a data string transmitted from the virtual lane determined as the failure lane.

  (12) The determination of a fault lane in the virtual lane based on the calculated error rate may be performed by outputting the data lane in which the calculated error rate is equal to or higher than a preset threshold, or The repeater according to (11), wherein the virtual lane that outputs a data string in which the calculated error rate increase rate is equal to or greater than a preset threshold value is determined as the failure lane.

(13) A transmitter that transmits transmission data, a transmission system that includes a relay that transfers the transmission data received from the transmitter, and a receiver that receives data transmitted from the relay,
The transmitter and a relay that receives transmission data from the transmitter are connected by a first transmission path, and the relay that transmits the transmission data to the receiver and the receiver are connected by a second transmission path,
The first transmission path is configured by bundling a first number of transmission lanes,
The second transmission path is configured by bundling a second number of transmission lanes,
The transmitter, the repeater, and the receiver comprise a number of virtual lanes that can be multiplexed into the first number of transmission lanes and the second number of transmission lanes;
The receiver
Receiving a multiplexed data string from transmission lanes constituting the second transmission path;
Dividing the received data string into data strings of the number of usable virtual lanes based on usable lane information inserted into the received data string and including information on the usable virtual lanes;
From the received data sequence, detected by the transmitter, identification information for identifying the virtual lane,
Monitor each transmission lane of the second transmission path and the failure of each virtual lane,
Based on the failure monitoring result of the transmission lane, determine the failure lane,
Based on the determination result and failure notification information inserted from the data string output from the virtual lane that has been transmitted and transmitted from the repeater, determine the usable virtual lane,
Transmitting use lane information including information on the determined available virtual lanes to the transmitter;
Based on the detected identification information, correct the arrival sequence shift of the received data sequence and the reception position shift in the virtual lane caused by the arrival time difference of the data sequence between the transmission lanes,
A receiver, wherein the divided data string is restored to the transmission data.

(14) monitoring a signal of a data string output from each transmission lane of the second transmission path;
Determining the transmission lane of the second transmission line that outputs a data string whose signal strength of the data string is equal to or less than a preset threshold value as the failure lane;
Monitoring the synchronization of the data string output from the virtual lane,
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
Monitor the data string output from the virtual lane,
The virtual lane that outputs the data string in which the data string indicating that the fault lane is inserted by the relay is determined as the fault lane,
When determining the usable virtual lane, based on the determination result, determine the usable virtual lane so that the failed lane is not used,
Generating the available lane information including information on the determined available virtual lanes;
The receiver according to (13), wherein the generated usable lane information is transmitted to the transmitter.

  (15) The receiver according to (14), wherein the data string indicating that the fault lane is a DC-balanced data string.

(16) monitoring a signal of a data string output from each transmission lane of the second transmission path;
Determining a transmission lane of the second transmission path that outputs a data string whose signal strength is equal to or lower than a preset threshold as a fault lane;
Monitoring the synchronization of the data string output from the virtual lane,
The virtual lane that outputs a data string out of synchronization is determined as the failure lane,
Based on the error correction parity calculated by the transmitter and inserted in the data string output from the virtual lane, the error rate of the virtual lane is calculated,
Determining the failed lane in the virtual lane based on the calculated error rate;
A virtual lane that outputs a data string into which a data string indicating that it is the failed lane is determined as the failed lane,
When determining the usable virtual lane, based on the determination result, determine the usable virtual lane so that the failed lane is not used,
Generating the available lane information including information on the determined available virtual lanes;
The receiver according to (13), wherein the generated usable lane information is transmitted to the transmitter.

  (17) The determination of the fault lane in the virtual lane based on the calculated error rate may be performed by outputting the data lane in which the calculated error rate is equal to or higher than a preset threshold, or the The receiver according to (16), wherein the virtual lane that outputs a data string having a calculated error rate increase rate equal to or higher than a preset threshold value is determined as the failure lane.

DESCRIPTION OF SYMBOLS 1 Transmitter 2 Relay machine 3 Receiver 4 Transmitter / receiver 10 Frame buffer 12 Capacity conversion part 13 Transmission encoding part 14 Round robin part 15 Marker insertion part 16 Error correction encoding part 17 Multiplexer part 20 Signal detection part 21 Signal monitoring part 22 Demultiplexer unit 23 Block synchronization unit 24 Synchronization monitoring unit 25 Failure management unit 26 Failure notification insertion unit 27 Multiplexer unit 28 PRBS generation unit 29 Selector unit 30 Error detection unit 31 Error monitoring unit 40 Signal detection unit 41 Signal monitoring unit 42 Demultiplexer unit 43 block synchronization unit 44 synchronization monitoring unit 45 error detection unit 46 error monitoring unit 47 PRBS inspection unit 48 PRBS monitoring unit 49 failure notification detection unit 50 failure notification monitoring unit 51 used lane determination unit 52 marker inspection unit 53 capacity determination unit 54 phase difference Detection unit 55 Deskew unit 56 Marker deletion unit 57 Decoding unit 58 capacity conversion section feed

Claims (20)

A transmitter for transmitting transmission data to a receiver, a relay for receiving the transmission data from the transmitter and transferring the received transmission data to the receiver, and a receiver for receiving the transmission data from the relay A transmission system comprising:
The transmitter and a relay that receives transmission data from the transmitter are connected by a plurality of first transmission lanes,
The relay for transmitting the transmission data to the receiver and the receiver are connected by a plurality of second transmission lanes,
The transmitter, the repeater, and the receiver each include a plurality of virtual lanes for multiplexing a data sequence according to the number of transmission lanes,
The transmitter is
Dividing the transmission data into a data string of the number of usable virtual lanes based on the used lane information transmitted from the receiver and including information on the usable virtual lanes;
Insert the usable lane information into the data string output from the virtual lane,
The data string output from each virtual lane is multiplexed based on the first transmission lane number,
Transmitting the multiplexed data sequence;
The repeater is
Receiving the multiplexed data sequence from each of the first transmission lanes;
Based on the usable lane information included in the received data string, divide the received data string into a data string of the number of usable virtual lanes,
Monitor each virtual lane failure,
Converting at least a part of each data string output from the virtual lane in which a failure has occurred into information for notifying the failure;
Multiplexing each data string output from the virtual lane based on the number of transmission lanes of the second transmission path,
Transmitting the multiplexed data sequence to the receiver or the other repeater;
The receiver
Receiving the multiplexed data sequence from each of the second transmission lanes;
Based on the usable lane information included in the received data string, divide the received data string into a data string of the number of usable virtual lanes,
Monitor each virtual lane failure,
Based on the monitoring result, identify the virtual lane in which a failure has occurred, determine the usable virtual lane,
Transmitting use lane information including information on the determined available virtual lanes to the transmitter;
A transmission system, wherein the divided data string is restored to the transmission data. The repeater is
Monitoring the signal of the data string output from each of the first transmission lanes, detecting the first transmission lane that outputs the data string having a signal strength of the data string equal to or lower than a preset threshold; Output the first detection result,
Monitoring the synchronization of the data string output from each virtual lane, detecting the virtual lane outputting the data string out of synchronization, and outputting a second detection result;
Based on the first detection result and the second detection result, the virtual lane in which the failure has occurred is identified,
Converting at least a part of each data string output from the virtual lane identified as having a failure into information for notifying the failure;
The receiver
The transmission system according to claim 1, wherein a virtual lane in which the failure has occurred is specified by monitoring whether or not information for notifying the failure is included. The receiver
Monitoring the signal of the data string output from each of the second transmission lanes, detecting the second transmission lane that outputs the data string having a signal strength of the data string equal to or lower than a preset threshold; Output the third detection result,
Monitoring the synchronization of the data string output from each virtual lane, detecting the virtual lane outputting the data string out of synchronization, and outputting a fourth detection result;
Monitoring the data string output from each virtual lane, detecting the virtual lane outputting the data string including information for notifying the failure, and outputting a fifth detection result;
When determining the usable virtual lane, the usable virtual lane is determined based on the third detection result, the fourth detection result, and the fifth detection result;
Generating the available lane information including information on the determined available virtual lanes;
The transmission system according to claim 2, wherein the generated usable lane information is transmitted to the transmitter.   The transmission system according to claim 2, wherein the repeater uses a DC-balanced data string as information for notifying the failure.   5. The transmission system according to claim 4, wherein the DC-balanced data string is random bits. The transmitter is
Based on the data string output from each virtual lane, error correction parity is calculated,
Inserting the calculated error parity into the data string output from each virtual lane;
The repeater is
Monitoring the signal of the data string output from each of the first transmission lanes, detecting the first transmission lane that outputs the data string having a signal strength of the data string equal to or lower than a preset threshold; Output the sixth detection result,
An error rate of each virtual lane is calculated based on an error correction parity included in the data string output from each virtual lane, and the virtual device in which a failure has occurred is calculated based on the calculated error rate. Lane is detected, the seventh detection result is output,
Monitoring the synchronization of the data string output from each of the virtual lanes, detecting the virtual lane outputting the data string out of synchronization, and outputting an eighth detection result;
Based on the sixth detection result, the seventh detection result, and the eighth detection result, the virtual lane in which the failure occurs is identified,
Converting at least a part of the data string output from the virtual lane identified as the occurrence of the failure into information for notifying the failure;
The receiver
The transmission system according to claim 1, wherein a virtual lane in which the failure has occurred is specified by monitoring whether or not information for notifying the failure is included. The receiver
Monitoring the signal of the data string output from each of the second transmission lanes, detecting the second transmission lane that outputs the data string having a signal strength of the data string equal to or lower than a preset threshold; Output the 9th detection result,
Monitoring the synchronization of the data string output from each virtual lane, detecting the virtual lane outputting the data string out of synchronization, and outputting a tenth detection result;
The error rate of each virtual lane is calculated based on the error correction parity included in the data string output from each virtual lane, and a failure has occurred based on the calculated error rate Detect virtual lane, output eleventh detection result,
Detecting the virtual lane that outputs the data string including information for notifying the failure, and outputting a twelfth detection result;
When determining the usable virtual lane, the usable virtual lane is determined based on the ninth detection result, the tenth detection result, the eleventh detection result, and the twelfth detection result. And
Generating the available lane information including information on the determined available virtual lanes;
The transmission system according to claim 6, wherein the generated usable lane information is transmitted to the transmitter.   The process of detecting the virtual lane in which a failure has occurred based on the calculated error rate, the virtual lane that outputs the data string in which the calculated error rate is equal to or higher than a preset threshold value, Alternatively, the virtual lane that outputs the data string in which the calculated error rate increase rate is equal to or higher than a preset threshold value is detected as the failed lane in which a failure has occurred. Item 8. The transmission system according to Item 6 or Item 7. A receiving unit for receiving a multiplexed data sequence from a plurality of transmission lanes;
A demultiplexer unit that divides the received data string into data strings of the number of usable virtual lanes based on usable lane information including information on available virtual lanes included in the received data string;
A fault monitoring unit that monitors faults in each virtual lane;
A conversion unit that converts at least a part of the data string output from the virtual lane identified as having a failure by the failure monitoring unit into information for notifying the failure;
A multiplexer unit that multiplexes each data string output from the virtual lane into a plurality of data strings;
A transmission unit that outputs the plurality of data strings multiplexed in the multiplexer unit;
A relay device comprising: The signal of the data string output from each transmission lane is monitored, the transmission lane that outputs the data string whose signal strength of the data string is equal to or less than a preset threshold is detected, and the first detection A signal monitoring unit for outputting the results;
A synchronization monitoring unit that monitors the synchronization of the data string output from each of the virtual lanes, detects the virtual lane that outputs the data string that is out of synchronization, and outputs a second detection result;
With
The failure monitoring unit identifies the virtual lane in which a failure has occurred based on the first detection result and the second detection result,
The conversion unit converts at least a part of the data string output from the virtual lane identified as the occurrence of the failure into information for notifying the failure. 9. The repeater according to 9.   11. The repeater according to claim 10, wherein a DC-balanced data string is used as information for notifying the failure.   The repeater according to claim 11, wherein the DC-balanced data string is random bits. The signal of the data string output from each transmission lane is monitored, the transmission lane that outputs the data string whose signal strength of the data string is equal to or less than a preset threshold is detected, and third detection A signal monitoring unit for outputting the results;
An error rate of each virtual lane is calculated based on an error correction parity included in the data string output from each virtual lane, and the virtual device in which a failure has occurred is calculated based on the calculated error rate. An error parity monitoring unit that detects a lane and outputs a fourth detection result;
A synchronization monitoring unit that monitors the synchronization of the data string output from each virtual lane, detects the virtual lane that outputs the data string that is out of synchronization, and outputs a fifth detection result;
With
The failure monitoring unit identifies the virtual lane in which the failure has occurred based on the third detection result, the fourth detection result, and the fifth detection result,
The conversion unit converts at least a part of the data string output from the virtual lane identified as the occurrence of the failure into information for notifying the failure. 9. The repeater according to 9.   The error parity monitoring unit is configured to preset the virtual lane that outputs the data string in which the calculated error rate is equal to or greater than a preset threshold value, or an increase rate of the calculated error rate. The repeater according to claim 13, wherein the virtual lane that outputs the data string equal to or greater than a threshold value is detected as the virtual lane in which the failure has occurred. A receiving unit for receiving a multiplexed data sequence from a plurality of transmission lanes;
A demultiplexer unit that divides the received data string into a data string of the number of usable virtual lanes based on usable lane information including information on the available virtual lanes included in the received data string;
A fault monitoring unit that monitors faults in each virtual lane;
Based on the failure notification information included in the data string output from the virtual lane in which a failure has occurred, the usable virtual lane is determined, and the used lane including information regarding the determined usable virtual lane Use information lane determination unit,
A restoration unit for restoring the divided data string to transmission data;
A receiver comprising: Monitoring a signal of the data string output from each of the transmission lanes, detecting the transmission lane that outputs the data string having a signal strength of the data string equal to or lower than a preset threshold, A signal monitoring unit for outputting detection results;
A synchronization monitoring unit that monitors the synchronization of the data string output from each of the virtual lanes, detects the virtual lane that outputs the data string that is out of synchronization, and outputs a second detection result;
A failure notification monitoring unit that detects the virtual lane that outputs the data string including information for notifying the failure and outputs a third detection result;
With
The use lane determining unit
Determining the usable virtual lane based on the first detection result, the second detection result, and the third detection result;
Generating the available lane information including information on the determined available virtual lanes;
The receiver according to claim 15, wherein the generated usable lane information is transmitted.   The receiver according to claim 16, wherein the information for notifying the failure is a DC balanced data string.   The receiver according to claim 17, wherein the DC-balanced data string is random bits. The signal of the data string output from each transmission lane is monitored, the transmission lane that outputs the data string whose signal intensity is equal to or lower than a preset threshold is detected, and a fourth detection result is output. A signal monitoring unit;
A synchronization monitoring unit that monitors the synchronization of the data string output from each virtual lane, detects the virtual lane that outputs the data string that is out of synchronization, and outputs a fifth detection result;
An error rate of the virtual lane is calculated based on an error correction parity included in the data string output from each of the virtual lanes, and the virtual lane in which a failure has occurred is calculated based on the calculated error rate. And an error parity monitoring unit that outputs a sixth detection result;
A failure notification monitoring unit that detects the virtual lane that outputs the data string including information for notifying the failure and outputs a seventh detection result;
With
The use lane determining unit
Based on the fourth detection result, the fifth detection result, the sixth detection result, and the seventh detection result, the usable virtual lane is determined,
Generating the available lane information including information on the determined available virtual lanes;
The receiver according to claim 15, wherein the generated usable lane information is transmitted.   The error parity monitoring unit is configured to preset the virtual lane that outputs the data string in which the calculated error rate is equal to or greater than a preset threshold value, or an increase rate of the calculated error rate. The receiver according to claim 19, wherein the virtual lane that outputs the data string equal to or greater than a threshold value is detected as a virtual lane in which the failure has occurred.

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