KR19990042382A - Dependent signal connection device of optical transmission system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a slave signal connection device of an optical transmission system.

2. The technical gist of the invention to solve

SUMMARY OF THE INVENTION An object of the present invention is to provide a slave signal connection device capable of delivering a slave signal to a function unit for processing a high speed signal by setting a mode, and delivering the high speed signal to a function unit for processing a slave signal.

3. Summary of the Solution of the Invention

The present invention provides a high-speed signal receiving means for receiving a high-speed signal from the outside to demultiplex and demultiplex; Data conversion means for converting the data output from the high speed signal receiving means to connect the dependent signal processing means; Data transmission means for transmitting the high speed signal to the slave signal connection unit; And high speed signal transmission means for mixing and multiplexing the received dependent signals and transmitting them to the high speed signal connection means.

4. Important uses of the invention

The present invention is used to connect a high speed signal and a low speed signal through a mode setting in an optical transmission system.

Description

Dependent signal connection device of optical transmission system

The present invention relates to a technique for connecting a high speed signal and a low speed signal in an optical transmission system, and more particularly, by simply setting a mode to transfer a slave signal to a function unit for processing the high speed signal, and to transfer the high speed signal to a function unit for processing the slave signal. It relates to a slave signal connection device.

Synchronous optical transmission systems conforming to the ITU-T Recommendations match Synchronous Transfer Mode (STM) -1, STM-4 and STM-16 signals and multiplex them into STM-64 signals for transmission.

1 shows a block diagram of a conventional optical transmission system.

As shown in FIG. 1, the conventional optical transmission system includes a high speed signal processor 10 for processing an STM-64 signal and a slave signal processor 20 for processing STM-1, STM-4, and STM-16 signals. It includes.

The high speed signal processor 10 receives the STM-64 optical signal from the outside and converts the first optical receiver 11 into an electrical signal, and de-multiplexes the electrical signal transmitted from the first optical receiver 11 to the slave signal processor. A first demultiplexer 12 outputted to 20, a first multiplexer 13 multiplexing an electric dependent signal transmitted from the subordinate signal processor 20, and a first multiplexer 13 outputted from the first multiplexer 13; A first optical transmitter 14 converts an electrical signal into an optical signal and transmits the signal to the outside.

The slave signal processor 20 may include second to fourth optical receivers 21, 22, and 23 to receive STM-1, STM-4, and STM-16 optical signals from the outside, and convert them into electrical signals. Second to fourth demultiplexers 24 and 25 which demultiplex each of the electrical signals output from the fourth optical receivers 21, 22, and 23, and output the demultiplexed signals to the first multiplexer 13 of the high speed signal processor 10. , 26, second to fourth multiplexers 27, 28 and 29 for multiplexing the electric high speed signal output from the first demultiplexer 12 of the high speed signal processor 10, and the second to fourth Second to fourth optical transmitters 30, 31 and 32 convert the electrical signals output from the multiplexers 27, 28 and 29 into optical signals and transmit them to the outside, respectively.

The operation of the conventional optical transmission system having the structure as described above will be described in detail as follows.

The first optical receiver 11 receives the 10 Gbps STM-64 optical signal from the opposing power station, converts the optical signal into an electrical signal, and transmits the converted electrical signal to the first demultiplexer 12. The first demultiplexer 12 converts the converted 10 Gbps STM-. The 64 optical signals are demultiplexed and transmitted to the second to fourth multiplexers 27, 28, and 29 of the dependent signal processor 20. Subsequently, the second to fourth multiplexers 27, 28, and 29 of the dependent signal processor 20 multiplex the electronic signal received from the first demultiplexer 12 by inserting an overhead corresponding to the synchronous transmission scheme. And transmit the multiplexed signals to the second to fourth optical transmitters 30, 31, and 32. The multiplexed electrical signals are converted to optical signals to convert the multiplexed electrical signals into optical signals. Send to the power.

In addition, the second to fourth optical receivers 21, 22, and 23 respectively receive the STM-1, STM-4, and STM-16 optical signals and convert them into electrical signals to convert the second to fourth demultiplexers 24, 25, 26, and the second to fourth demultiplexers 24, 25, and 26 demultiplex the transmitted STM-1, STM-4, and STM-16 electrical signals to the high-speed signal processor 10. Transfer to the first multiplexer 13. Subsequently, the first multiplexer 13 of the high speed signal processor 10 inserts an overhead corresponding to the synchronous transmission scheme into the electrical slave signal transmitted from the slave signal processor 20 to convert the multiplexed and multiplexed electrical signals into a first signal. The first optical transmitter 14 converts the multiplexed electrical signal into an optical signal and transmits the optical signal to the opposing counterpart.

Meanwhile, the 2.5Gbps STM-16 signal may be demultiplexed into four 622Mbps STM-4 signals, 16 155Mbps STM-1 signals or 48 52Mbps AU-3 signals, which are basic units of a synchronous transmission module. In addition, the 622Mbps STM-4 signal can be demultiplexed into one 622Mbps STM-4 signal, four 155Mbps STM-1 signals, or twelve 52Mbps AU-3 signals. The 155 Mbps STM-1 signal may be demultiplexed into one 155 Mbps STM-1 signal or three 52 Mbps AU-3 signals. As a result, signals demultiplexed from the three types of dependent signals may be mixed at different bit rates. In particular, in case of STM-1 signal, 19 Mbps according to byte interleaving multiplexing method of synchronous transmission method (SDH) Although it is appropriate to process it into eight, this is because of the disadvantage of providing a large number of signal lines, the processing of the 52 Mbps signal rate per AU3 is common, and in the case of higher speed signals STM-4, STM-16, and STM-64 signals, bytes It is paralleled at 78Mbps signal rate to follow the interleaving multiplexing scheme.

However, in the case of the conventional optical transmission system as described above, since the basic units of the STM-1 dependent signal and the STM-4 and STM-16 dependent signal processing are different from each other, the connection with the high-speed signal processing unit 10 is different from each other. By doing so, there was still a problem that the optical transmission system became very complicated.

Accordingly, the present invention devised to solve the above-described problems, regardless of the type of the functional unit for receiving and processing the different dependent signals can be delivered to the functional unit for processing the high-speed signal by a simple mode setting. It is also possible to provide a slave signal connection device that can simplify the signal connection between the functional units by enabling a high speed signal to be transferred to a functional unit for processing at least one slave signal by a simple mode setting. have.

1 is a block diagram of a conventional optical transmission system.

2 is a block diagram of an embodiment in which the slave signal access device according to the present invention is applied to an optical transmission system.

3 is a block diagram of an embodiment of a slave signal access apparatus according to the present invention;

Explanation of symbols on the main parts of the drawings

100: high speed signal processing unit 110: high speed signal receiving processing unit

120: high speed signal connection unit 130: high speed signal transmission processing unit

200: dependent signal processing unit

210, 220, 230: first to third dependent signal receiving processing unit

240, 241 and 242: first to third subordinate signal connection units

250, 260, and 270: first to third slave signal transmission processing units

According to another aspect of the present invention, there is provided a slave signal connection device, comprising: high speed signal receiving means for receiving a high speed signal from an outside to demultiplex and demultiplex; First data converting means for converting data output from said high speed signal receiving means for connection to a low speed signal; First selecting means for selecting one of an output signal of the high speed signal receiving means and an output signal of the first data converting means according to a control signal transmitted from the outside; Data transmission means for transmitting the signal output from the first selection means to the outside; Data receiving means for receiving data at a predetermined speed from the outside; Frame aligning means for aligning frames of data of a predetermined rate from the data receiving means; Second data conversion means for converting the frame aligned data outputted from the frame alignment means for connection of a high speed signal; Second selecting means for selecting one of an output signal of the data receiving means and an output signal of the second data converting means according to the control signal; And high speed signal transmission means for mixing and multiplexing the data transmitted from the second selection means to transmit to the outside.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

2 is a block diagram of an embodiment of an optical transmission system to which a slave signal access device according to the present invention is applied.

The optical transmission system shown in FIG. 2 receives the STM-64 optical signal, converts it into an electrical signal, and then demultiplexes the high speed signal receiving processing unit 110 and delivers the high speed signal output from the high speed signal receiving processing unit 110. A high speed signal processing unit (100) having a high speed signal connection unit (120), a high speed signal transmission processing unit (130) for multiplexing the transmitted electric dependent signals, converting them into optical signals, and transmitting them to the outside, and STM-1 and STM from the outside. First to third dependent signal reception processing units 210, 220, and 230 to receive -4 and STM-16 optical signals, convert them into electrical signals, and demultiplex the first and third dependent signal reception processing units 210. First to third slave signal connection units 240, 241 and 242 and the high speed signal connection unit 120 which transmit the dependent signals output from the 220 and 230 to the high speed signal transmission processing unit 130 of the high speed signal processing unit 100, respectively. Of the high-speed signal reception processing unit 110 transmitted through And a slave signal processor 200 including first to third slave signal transmission processors 250, 260, and 270 for multiplexing an output signal and converting the signal into an optical signal and transmitting the signal to the outside.

The high speed signal receiving processor 110 receives a STM-64 optical signal and converts the first optical receiver 111 into an electrical signal, and a first demultiplexer that demultiplexes an electrical signal output from the first optical receiver 111. The unit 112 is provided.

The high speed signal transmission processor 130 converts the electrical signal output from the first multiplexer 131 and the first multiplexer 131 to multiplex the electrical dependent signal transmitted from the dependent signal processor 200 into an optical signal. An optical transmitter 132 for transmitting to the outside is provided.

The first dependent signal receiving processor 210 receives the STM-1 optical signal from the outside and converts the second optical receiver 211 into an electrical signal, and the second multiplexer that demultiplexes the signal output from the second optical receiver 211. The demultiplexing unit 212 is provided.

The second subordinate signal receiving processor 220 receives a STM-4 optical signal from the outside and converts the optical signal into an electrical signal, and demultiplexes the signal output from the third optical receiver 221. Three demultiplexing unit 222 is provided.

The third subordinate signal receiving processor 230 receives a STM-16 optical signal from the outside and converts the optical signal into an electrical signal, and demultiplexes the signal output from the fourth optical receiver 231. Four demultiplexer 232 is provided.

The first slave signal transmission processor 250 may include a second multiplexer 251 for multiplexing an output signal of the high speed signal reception processor 110 transmitted through the high speed signal connection unit 120, and a second multiplexer 251. And a second optical transmitter 252 which converts the output signal into an optical signal and transmits the signal to the outside.

The second subordinate signal transmission processor 260 may be configured to, from the third multiplexer 261 and the third multiplexer 261, multiplex the output signal of the high speed signal reception processor 110 transmitted through the high speed signal connection unit 120. And a third optical transmitter 262 for converting the output signal into an optical signal for transmission to the outside.

The third subordinate signal transmission processor 270 is configured to multiplex the output signal of the high speed signal reception processor 110 transmitted through the high speed signal connection unit 120 from the fourth multiplexer 271 and the fourth multiplexer 271. And a fourth optical transmitter 272 for converting the output signal into an optical signal for transmission to the outside.

Meanwhile, the dependent signal processor 200 may include an STM-1 signal processor 281 including a first slave signal reception processor 210, a first slave signal connection unit 240, and a first slave signal transmission processor 250. STM-4 signal processing unit 282 including a second dependent signal receiving processor 220, a second dependent signal connecting unit 241, and a second dependent signal transmitting processor 260, and a third dependent signal receiving processor 230. And an STM-16 signal processor 283 including a third slave signal connection unit 242 and a third slave signal transmission processor 270.

The operation of the optical transmission system having the structure as described above will be described in detail as follows.

The high speed signal receiving processing unit 110 receives the 10Gbps optical signal from the opposite station and converts the signal into an electrical signal and demultiplexes it into 16 622Mbps signals. The 16 demultiplexed 622Mbps signals are converted into 128 (16x8) 78Mbps signals that can be easily processed by digital technology, and then the frames are arranged in units of AU (Administrative Unit) units by pointer processing. Eight 78 Mbps parallel signals arranged in AU units are input to the high speed signal connection unit 120 through a backboard pattern in the high speed signal processing unit 100.

The high speed signal access unit 120 multiplexes 8 input 78Mbps data into 8: 1, configures 622Mbps data, and transmits the data to the slave signal processing unit 200 through 16 signal cables. The 622 Mbps data transmitted in this way is demultiplexed back to eight 78 Mbps through the first to third dependent signal connection units 240, 241, and 242 in the dependent signal processing unit 200. Is transmitted to the second to fourth multiplexers 251, 261, and 271 through a backboard pattern in the dependent signal processor 200.

In the case of the STM-4 signal processor 282 and the STM-16 signal processor 283, the STM-4 signal processor 282 and the STM-16 signal processor 283 may be directly transmitted to the third and fourth slave signal transmission processors 260 and 270 in the slave signal processor 200 without any processing. However, in the case of the STM-1 signal processing unit 281, since the basic unit constituting the STM-1 signal is AU-3 51.84 Mbps as described above, the STM-1 signal processing unit 281 is transferred to the second multiplexing unit 251 in the dependent signal processing unit 200. Before the transmission, a 78Mbps signal needs to be converted into a 52Mbps signal. In this way, the high speed signal processing unit 100 inserts an overhead or the like according to the synchronous transmission scheme into the signals input to the second to third multiplexing units 251, 261, and 271 in the subordinate signal processing unit 200. The multiplexed dependent signal is converted into an optical signal through the second to fourth optical transmitters 252, 262, and 272 of the dependent signal processor 200, and outputted to the opposite station.

On the contrary, the STM-1, STM-4, and STM-16 signals received from the outside are converted into electrical signals through the first to third subordinate signal reception processing units 210, 220, and 230, and then demultiplexed to perform pointer processing. After synchronization with the reference system clock used in the local station, the signal is transmitted to the first to third slave signal connectors 240, 241, and 242 through a backboard pattern in the slave signal processor 200. In this case, the STM-4 signal and the STM-16 signal are transmitted in the unit of 78Mbps, and in the case of the STM-1 signal, the unit is transmitted in the 52Mbps unit.

In this way, the slave signals inputted to the first to third slave signal connectors 240, 241 and 242 are 8: 1 multiplexed and composed of 622Mbps signals, and then the high-speed signal connector 120 of the high-speed signal processor 100 is connected through a cable. Is sent to. The high speed signal connection unit 120 of the high speed signal processing unit 100 decodes 622 Mbps 16 signals received from the subordinate signal processing unit 200 by 1: 8, respectively, and configures 128 pieces of 78 Mbps data, and then, the high speed signal processing unit 100 The high speed signal transmission processor 130 transmits the data through the backboard pattern. The high-speed signal transmission processor 130 inserts the multiplexing overheads necessary for 10Gbps transmission into the received 128 78Mbps signals, converts them into 10Gbps optical signals, and transmits them to the opposite station.

As described above, since the basic unit of the signal processed by the slave signal processing unit 200 is different from each other, the connection device between the slave signal processing unit 200 and the high speed signal processing unit 100 is the first slave signal connection unit for the STM-1 signal. 240, the second slave signal connector 241 for the STM-4 signal and the third slave signal connector 242 for the STM-16 signal.

Accordingly, in the present invention, regardless of the type of the slave signal processing unit for connection of the signal connection between the slave signal processing unit and the high speed signal processing unit, it is possible to connect to any slave signal processing unit by simple mode setting. The slave signal may be transmitted to the signal processor, and the high speed signal may be received from the high speed signal processor and transmitted to the slave signal processor.

3 is a block diagram of an embodiment of a slave signal access apparatus according to the present invention.

As shown in FIG. 3, the first to third subordinate signal connection units 240, 241, and 242 of FIG. 2 may include a high speed signal receiver 121 for demultiplexing and demultiplexing a high speed signal, and a high speed signal receiver. A first data converter 122 for converting the data output from the 121 to the slave signal processor 200 and an output signal of the high speed signal receiver 121 according to a 522 Mbps / 78 Mbps control signal transmitted from the outside; And a first selector 123 for selecting one of the output signals of the first data converter 122, and data for transmitting the signal output from the first selector 123 to the dependent signal processor 200. The transmitter 124 is provided.

In addition, the first to third dependent signal connection units 240, 241 and 242 of FIG. 2 include a data receiver 243 and a data receiver 243 that receive predetermined data from the outside regardless of the type of the dependent signal. A frame aligner 244 for arranging frames and a frame-aligned predetermined data output from the frame aligner 244 to reduce a delay deviation between the predetermined data received through the predetermined data; A second selection for selecting one of an output signal of the data receiver 243 and an output signal of the second data converter 245 according to the second data converter 245 and a 52Mbps / 78Mbps control signal transmitted from the outside; And a high speed signal transmitter 247 for mixing and multiplexing data transmitted from the second selector 246 to the high speed signal processor 100.

The high speed signal receiving unit 121 includes a receiving unit 121-1 for receiving a high speed signal and a demultiplexing and demixing unit 121-2 for demultiplexing and demixing a signal received through the receiving unit 121-1. do.

The high speed signal transmitter 247 is a mixed and multiplexer 247-1 for mixing and multiplexing the signal output from the second selector 246, and a high speed signal for the signal output from the mixed and multiplexer 247-1. The transmitter 247-2 which transmits to the process part 100 is provided.

Referring to the operation of the slave signal connection device of the optical transmission system according to the present invention having the structure as described above in detail as follows.

First, a process of receiving a slave signal and transmitting the slave signal to the high speed signal processor will be described.

The data receiver 243 receives 12 52 Mbps data regardless of 78 Mbps STM-4 and STM-16 or 52 Mbps STM-1, which are dependent signals transmitted from the outside, or only 8 signals when receiving 8 78 Mbps data. Receive.

First, in the case of STM-1 dependent signal processing, since 12 52 Mbps data received through the data receiving unit 243 is received from three different STM-1 receiving devices three by three to reduce the delay variation between the devices The frame alignment unit 244 is to pass through. In this way, the 12 frames of 52 Mbps in frame alignment are converted into eight parallel signals of 78 Mbps by the data converter 245 and transmitted to the second selector 246.

Next, in the case of STM-4 and STM-16 dependent signal processing, eight 78 Mbps data received through the data receiving unit 243 is transferred to the second selection unit 246 without any processing.

In this way, when eight 78 Mbps data of the STM-1 dependent signal and eight 78 Mbps data of the STM-4 and STM-16 dependent signals are transmitted, the second selector 246 is configured as a slave signal processor to which the dependent signal connection unit is to be mounted. According to the types of the STM-1, STM4, and STM-16 processing units 281, 282, and 283, the control signal input from the outside is used to control the output signal of the data receiving unit 243 and the second data conversion unit (100). One signal from among the output signals of 245 is selected and transmitted to the high speed signal transmitter 247. Subsequently, the high speed signal transmitter 247 mixes the eight signals of the 78 Mbps data selected by the second selector 246 to 622 Mbps and transmits the signals to the high speed signal processor 100.

Next, a process of receiving the high speed signal and transmitting the same to the dependent signal processor will be described.

The high speed signal receiver 121 demultiplexes and demultiplexes the received 622 Mbps signal into eight signals of 78 Mbps, and transmits the 622 Mbps signal to the first data converter 122 and the first selector 123. The first data converter 122 converts the data transmitted from the high-speed signal receiver 121 into twelve 52 Mbps data to provide a connection of 52 Mbps signals for STM-1 slave signal connection. To pass.

Subsequently, the first selector 123 selects one signal among eight 78 Mbps signals transmitted from the high speed signal receiver 121 and twelve 52 Mbps data transmitted from the first data converter 122 to transmit the data 124. To pass). That is, the first selector 123 is controlled by the control signal input from the outside according to the type of the STM-1, STM4 and STM-16 processors 281, 282, and 283 in the dependent signal processor 200. One signal is selected from eight 78 Mbps data for STM-4 and STM-16 slave signal connection and twelve 52 Mbps data for STM-1 dependent signal connection, and then transmitted to the data transmitter 124. The data transmitter 124 transmits the signal transmitted from the first selector 123 to the STM-1 signal processor 281, the STM-4 signal processor 282, or the STM-16 signal processor 283.

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, the present invention provides a high-speed signal by setting a simple mode regardless of the type of the STM-1 signal processor, STM-4 signal processor, and STM-16 signal processor for receiving and processing different dependent signals. The signal between the slave signal processor and the high-speed signal processor can be transferred to the processor, and the high-speed signal can be randomly transferred to the STM-1 signal processor, the STM-4 signal processor, and the STM-16 signal processor by simple mode setting. The simplicity of the connection has the effect of simplifying the configuration of the system.

Claims (7)

In the slave signal connection device, High speed signal receiving means for receiving a high speed signal from the outside and demultiplexing and demixing the high speed signal; First data converting means for converting data output from said high speed signal receiving means for connection to a low speed signal; First selecting means for selecting one of an output signal of the high speed signal receiving means and an output signal of the first data converting means according to a control signal transmitted from the outside; Data transmission means for transmitting the signal output from the first selection means to the outside; Data receiving means for receiving data at a predetermined speed from the outside; Frame aligning means for aligning frames of data of a predetermined rate from the data receiving means; Second data conversion means for converting the frame aligned data outputted from the frame alignment means for connection of a high speed signal; Second selecting means for selecting one of an output signal of the data receiving means and an output signal of the second data converting means according to the control signal; And High speed signal transmission means for mixing and multiplexing the data transmitted from the second selection means to the outside Subordinate signal connection device of the optical transmission system comprising a. The method of claim 1, The high speed signal receiving means, Receiving means for receiving a 622Mbps signal from said high speed signal processing means; Demultiplexing and demixing means for demultiplexing and demultiplexing 78 Mbps signals received through the receiving means into eight 78 Mbps signals Subordinate signal connection device of the optical transmission system comprising a. The method according to claim 1 or 2, The high speed signal transmission means, Mixing and multiplexing means for mixing and multiplexing eight 78 Mbps signals output from said second selecting means; And Transmitting means for transmitting the 622 Mbps signal output from the mixing and multiplexing means to the high speed signal processing means; Subordinate signal connection device of the optical transmission system comprising a. The method of claim 3, wherein The first data conversion means, And the eight 78 Mbps signals transmitted from the demultiplexing and demixing means convert twelve 52 Mbps signals. The method of claim 4, wherein The first selection means, Selecting one of the eight 78 Mbps signals transmitted from the demultiplexing and demixing means and the twelve 52 Mbps signals transmitted from the first data converting means according to a 52 Mbps / 78 Mbps control signal from the outside. Device. The method of claim 5, The frame alignment means, And frame-align 12 twelve 52 Mbps data received from the data receiving means and output the twelve 52 Mbps signals that are frame aligned to the second data converting means. The method of claim 6, The second data conversion means, And converting twelve 52 Mbps signals outputted from the frame aligning means and outputting eight 78 Mbps parallel signals to the second selecting means.