KR100221498B1 - Apparatus for connection of 2.5gb/s subordination signal transmission part in 10gb/s optical transmission system - Google Patents

Abstract

The present invention is to connect the optical signal to the 2.5Gb / s optical transmission apparatus used in the existing synchronous network in the 10Gb / s optical transmission system, and receives the 10Gb / s optical signal and converts the optical signal to the 77.76Mb / s data stream Data receiving means for outputting 128.77 Mb / s data, which is a clock and frame synchronization signal that is converted to an electrical signal and demultiplexed to recover the STM064 frame and terminate the overhead, and system clock and frame for the data of the data receiving means. A plurality of pointer processing means for performing a pointer process so as to conform to the scrambling, and then converting and outputting a 32-channel 77.76 Mb / s data stream into a high-speed data stream of a 622 Mb / s data stream, and the plurality of pointer processing means Receive four 622Mb / s high-speed data streams from the system, recover clock and frame pulses, demultiplex to 1: 8, and receive 77.76Mb / s low-speed data streams A high speed data conversion means for outputting 48 51 Mb / s data streams, 48 frame pulses, and a 51 MHz clock by converting the signal into 12 channels of 51 Mb / s data streams; and data of the high speed data conversion means. It consists of a data transmission means for converting and converting into a 2.5Gb / s optical signal, so that the 10Gb / s optical transmission system can be connected to the 2.5Gb / s optical transmission system in use in the existing network.

Description

2.5Gb / s slave signal transmitter connection device in 10Gb / s optical transmission system

The present invention performs overhead and pointer processing by receiving 10Gb / s data in order to connect an optical signal to a 2.5Gb / s optical transmission device used in an existing synchronization network in a 10Gb / s optical transmission system, and performs a 2.5Gb / s dependent signal. The purpose of the present invention is to provide a 2.5Gb / s slave signal transmitter connection device in a 10Gb / s optical transmission system that generates and outputs an optical signal of the STM-16 hierarchy.

The present invention performs overhead and pointer processing by receiving 10Gb / s data in order to connect an optical signal to a 2.5Gb / s optical transmission device used in a conventional synchronization network in a 10Gb / s optical transmission system, and performs a 2.5Gb / s dependent signal. The present invention relates to a 2,5Gb / s subordinate signal transmitter connection device in a 10Gb / s optical transmission system that separates and then converts it into an optical signal of the STM-16 level. As system technology is in the commercialization stage, there is a need for a method for 2.5Gb / s signal connection in a 10Gb / s optical transmission system.

The present invention receives the 10Gb / s data in order to connect the optical signal to the 2.5Gb / s optical transmission device used in the existing synchronous network in the 10Gb / s optical transmission system by processing the overhead termination pointer processing, high-speed data conversion and 2.5Gb / s The present invention provides an apparatus for performing functions such as data transmission, and the apparatus of the present invention divides functions appropriately into units in consideration of the capacity, stability, economy, etc. of the system, and makes them into optical signals of the STM-16 level 2.5 again. To a Gb / s optical transmission device.

1 is a structural diagram of a 2.5Gb / s slave signal transmitter connection device in a 10Gb / s optical transmission system according to an exemplary embodiment of the present invention.

2 is a block diagram of a 2.5Gb / s transmitter according to an exemplary embodiment of the present invention.

In the 10Gb / s optical transmission system provided by the present invention, the 2.5Gb / s slave signal transmitter connection device receives a 10Gb / s optical signal, converts the optical signal into an electrical signal of a 77.76Mb / s data stream, and demultiplexes the optical signal. Data receiving means for outputting 128 77.76 Mb / s data, which is a clock and frame synchronizing signal that terminates the recovery and overhead of the STM-64 frame, and processes the pointer to match the system clock and frame with respect to the data of the data receiving means. And a plurality of pointer processing means for converting and outputting 32 channels of 77.76Mb / s data streams into high-speed data streams of the 622Mb / s data streams, respectively, and 622Mb / from the plurality of pointer processing means. s Receives a high-speed data stream, recovers clock and frame pulses, demultiplexes 1: 8, converts it to a 77.76 Mb / s low-speed data stream, and then 12 A high speed data conversion means for converting a channel into a 51 Mb / s data stream of a channel and outputting 48 51 Mb / s data streams, 48 frame pulses, and a 51 MHz clock, and converting data of the high speed data conversion means into a 2.5 Gb / s optical signal; And data transmission means for converting and transmitting the data.

Among the data transmission means, the 48 51 Mb / s data streams transmitted from the high speed data conversion unit eliminate the transmission delay difference, and the data are aligned in the reference frame pulse and the clock phase by dividing by 24 channels. A plurality of phase alignment units for outputting a clock, 48 51 Mb / s data streams output from the plurality of phase alignment units, clock and frame pulses are inserted to insert a section overhead, and parallel to form an STM-16 level signal. A first section multiplexing section which converts the data frame into a scramble function and then multiplexes the 48 51 MHz data streams output from the section overhead processing section to 3: 1 and outputs the data as 16 155 Mb / s data streams. And a 155 Mb / s data stream outputted from the first multiplexer by 16: 1 to output a 2.5 Mb / s data stream. And second multiplexer, for receiving a data stream of the second multiplexer comprises a signal converting unit for converting and outputting as a 2.5Gb / s optical signal.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a 2.5Gb / s slave signal transmitter connection device in a 10Gb / s optical transmission system according to an embodiment of the present invention, and FIG. 2 is a block diagram of a 2.5Gb / s transmitter according to an embodiment of the present invention.

Referring to FIG. 1, in the 10Gb / s optical transmission system of the present invention, the 2.5Gb / s slave signal transmitter connection apparatus includes a 10Gb / s data receiver 10 and a plurality of pointer processors 20, 21, 22, and 23. And a high speed data converter 30 and a 2.5 Gb / s data transmitter 40.

The 10Gb / s data receiving unit 10 receives the 10Gb / s optical signal, converts it into an electrical signal, demultiplexes it into a 77.76Mb / s data stream, recovers the STM-64 frame, terminates the necessary overhead, and then transfers the 128G. Outputs together with 77.76 Mb / s clock and frame synchronization signals, and the plurality of pointer processing units 20, 21, 22, and 23 each have a capacity of 2.5 Gb / s of data received from the 10 Gb / s data receiving unit 10. A pointer process is performed on a 32-channel 77.76Mb / s data stream corresponding to a system clock and a frame, scrambled, and converted into a 622Mb / s high-speed data stream.

Then, the high speed data converter 30 receives the high data rate stream of 622 Mb / s from the plurality of pointer processors 20, 21, 22, and 23, recovers clock and frame pulses, and demultiplexes the signal to 1: 8. After conversion to 77.76Mb / s data streams, it is converted into 12-channel low-speed data streams, that is, 51Mb / s data streams, and outputs 48 51Mb / s data streams, four frame pulses, and a 51MHz clock.

The 2.5Gb / s data transmitter 40 converts the output value of the high speed data converter 30 into an optical signal of 2.5Gb / s and transmits the converted signal.

At this time, the 2.5Gb / s data transmitter 40 divides the reference frame pulse and the clock phase by dividing each of the 24 channels by using 48 51Mb / s data streams, frame pulses, and clocks transmitted from the high speed data converter 30. A plurality of phase aligners 41 and 42 for aligning data, outputting a reference frame and a clock, and eliminating a data transmission delay difference in a transmission path; Section overhead processing unit which receives 48 51 Mb / s data streams, clocks and frame pulses outputted from 42), inserts section overhead, converts into parallel data frames so as to become an STM-16 level signal, and then scrambles the 43), a 2.5G phase locked loop (PLL) circuit 44 for receiving a 51 MHz clock output from the section overhead processor 43 and generating a 2.5 GHz clock, and an output from the section overhead processor 43. Being 48 3: 1 MUX (Multiplexer) 45 for multiplexing 51 MHz data streams into 3: 1 and outputting 16 155 Mb / s data streams, and 155 Mb / s data streams of the 3: 1 MUX 45. 16: 1 MUX 46 for multiplexing 1 to output 2.5Gb / s data stream and 2.5G OTX for receiving and converting the data stream of 16: 1 MUX 46 to 2.5Gb / s optical signal Optical Transmitter (47).

At this time, the 2.5G PLL circuit 44 divides the generated 2.5GHz clock by 48 and uses it as its variable input.

The 16: 1 MUX 46 generates 2.5Gb / s data using the 2.5GHz clock generated by the 2.5G PLL circuit 44, and divides the 16: 1 155MHz clock into the 3: 1 MUX 45. Will output

Then, the 3: 1 MUX 45 generates 155Gb / s data with the 155MHz clock, and outputs a 51MHz clock generated by three division of the 155MHz clock to the variable input of the 2.5G PLL circuit 44. .

The operation of the 2.5Gb / s data transmitter of the 2.5Gb / s data transmitter connection device in the 10Gb / s transmission system according to the present invention is as follows.

First, when the 10Gb / s high-speed data converter 30 transmits 48 51M data streams together with 51M clocks and frame pulses to the plurality of phase alignment units 41 and 42 of the 2.5G transmitter 40, the plurality of 51M data streams may be used. 24 phases in one phase aligner 41 or 42 using 48 51M data streams, frame pulses, and clocks received by the 10Gb / s high-speed data converter 30 in the phase aligner 41 and 42 of FIG. The data is aligned on the reference frame pulse and clock phase. This eliminates the delay in data transmission from the channel and matches all data streams to one frame pulse and clock.

At this time, the aligned data stream, the reference frame pulse and the clock are input to the section overhead processor 43, and the section overhead processor 43 inserts the section overhead into the 48 51M data streams received. Simple bit interleaving converts the data into parallel data frames to perform the scramble function. It also inserts channels for alarm monitoring and maintenance.

The section overhead processor 43 provides the 51 MHz clock thus received through the buffer as the reference clock of the 2.5G PLL circuit 44.

The 48 51Mb / s data streams output from the section overhead processor 43 are input to the 3: 1 MUX 45. Here, 16 155Mb / s are performed by performing a 3: 1 multiplexing function using a simple bit interleaving method. Output the data stream.

The 16 155 Mb / s data streams are input to the 16: 1 MUX 46 and multiplexed by simple bit interleaving to generate one 2.5 Gb / s data and then input to the 2.5G OTX 47.

The 2.5G OTX 47 receives and converts 2.5Gb / s data into a 2.5G optical signal and outputs the 2.5Gb / s data. The signal is connected to a receiver of an existing 2.5G optical transmission system through an optical path.

On the other hand, the 2.5G PLL circuit 44 receives a 51 MHz clock of the section overhead processor 43 output as a reference clock to generate a 2.5 GHz clock, and divides it for 48 minutes to be used as a variable input of the PLL loop.

The generated 2.5 GHz clock is input to the 16: 1 MUX 46 to generate 2.5 Gb / s data, and is divided into 16 parts and input to the 3: 1 MUX 45 at a 155 MHz clock.

The 155 MHz clock is again divided by three and converted into a 51 MHz clock, which is used as the variable input of the PLL circuit 44.

In the above-described 10Gb / s optical transmission system, the 2.5Gb / s slave signal transmitter connection device is used to connect an optical signal from the 10Gb / s optical transmission system to the 2.5Gb / s optical transmission device in use in an existing synchronization network. In consideration of the capacity, stability, and economics of the system, the function is appropriately divided by unit, and it is designed to be connected to the 2.5G optical transmission device by converting it into an optical signal of the STM-16 level, and the 10Gb / s optical transmission system is Data can be connected to the 2.5Gb / s optical transmission system in use.

Claims (5)

Receives 10 Gb / s optical signals and converts the optical signals into electrical signals of 77.76 Mb / s data streams and demultiplexes the 128 77.76 Mb / clock-frame synchronization signals that terminate and recover the STM-16 frame s data output means for outputting s data, and pointer data processing for the data of the data receiving means according to the system clock and frame, and then scrambled, respectively, to receive the 622 Mb / s data stream of 32 channels of 77.76 Mb / s data stream. A plurality of point processing means for converting and outputting into a high speed data stream, and receiving four 622Mb / s high speed data streams from the plurality of pointer processing means to recover clock and frame pulses, and demultiplexing to 1: 8 to 77.76 48 Mb / s data streams and 48 frames, each of which is converted to a Mb / s slow data stream and then converted to 12 channels of 51 Mb / s data streams, respectively. A high speed data conversion means for outputting a pulse, a 51 MHz clock, and a data transmission means for converting and transmitting the data of the high speed data conversion means into an optical signal of 2.5 Gb / s. 2.5Gb / s slave signal transmitter interface. The method of claim 1, wherein the data transmitting means removes the transmission delay difference of the 48 51Mb / s data streams transmitted from the high speed data converter, and divides the data on the reference frame pulse and the clock phase by dividing by 24 channels. A plurality of phase alignment units for outputting a reference frame and a clock, 48 51 Mb / s data streams output from the plurality of phase alignment units, clocks, and frame pulses to insert section overhead, and an STM-16 level signal A section overhead processing unit which converts the data into a parallel data frame so as to be scrambled, and then multiplexes 48 51 MHz data streams output from the section overhead processing unit to 3: 1 and outputs the data as 16 155Mb / s data streams. A first multiplexer and a 155Mb / s data stream output from the first multiplexer are multiplexed to 16: 1 to form a 2.5Gb / s data stream. 2.5Gb / s dependent signal in 10Gb / s optical transmission system, characterized in that it comprises a second multiplexer for outputting and a signal changer for converting and outputting the 2.5Gb / s optical signal by receiving the data stream of the second multiplexer Transmission unit connection device. The apparatus of claim 2, wherein the clock generator divides the generated 2.53 GHz clock by 48 and uses the clock generator as a variable input of the clock generator. 3. The 10Gb of claim 2, wherein the second multiplexer generates 2.5Gb / s data using a 2.5GHz clock generated by the clock generator, and divides the 2.5GHz clock by 16 to output a 155MHz clock. 2.5Gb / s slave signal transmitter interface in optical transmission system. 3. The method of claim 2, wherein the first multiplexer generates 155 Gb / s data using the 155 MHz clock generated by the second multiplexer, divides the 155 MHz clock into three, and outputs a 51 MHz clock to a variable input of the clock generator. A device for connecting a 2.5Gb / s slave signal transmitter in a 10Gb / s optical transmission system.