KR100415546B1 - apparatus for dual-mode cording/decoding using code detection and its method - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a dual mode encoding / decoding apparatus for line code using code detection, a decoding method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. Technical problem to be solved by the invention

The present invention is to improve the initialization speed by determining the operation mode according to the control code detected from the received encoded data in the high-speed digital data transmission system supporting different line codes MB810, 8B / 10B without a separate signal exchange. A dual-mode encoding / decoding apparatus for line code using code detection, a decoding method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

3. Summary of Solution to Invention

In the dual mode encoding apparatus of the line code using code detection, the present invention stores encoding control signals for selectively operating the MB810 encoding means or the 8B / 10B encoding means in accordance with an encoder selection signal from the outside. Management storage means for transmitting the stored encoding control signal to the MB810 encoding means and the 8B / 10B encoding means; The MB810 encoding means for encoding the 8-bit data received from the media access control (MAC) into 10-bit encoded data according to the MB810 method by operating in accordance with an encoding control signal transmitted from the management storage means; The 8B / 10B encoding means for encoding the 8-bit data received from the MAC (Media Access Control) into 10-bit encoded data according to the 8B / 10B scheme by operating in accordance with an encoding control signal transmitted from the management storage means; And encoding multiplexing means for selectively outputting 10-bit encoded data encoded by the MB810 scheme from the MB810 encoding means or 10-bit encoded data encoded by the 8B / 10B scheme from the 8B / 10B encoding means.

4. Important uses of the invention

The present invention is applied to an apparatus for encoding and decoding line codes.

Description

Apparatus for dual-mode cording / decoding using code detection and its method}

The present invention relates to a dual mode encoding / decoding apparatus for line code using code detection, a decoding method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the above method. In the high-speed digital data transmission system supporting MB810, 8B / 10B), the line code using the code detection for improving the initialization speed by determining the operation mode according to the control code detected from the received encoded data without any signal exchange is required. A dual mode encoding / decoding apparatus, a decoding method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

In general, a high speed digital transmission system uses a line code for converting an original signal at a transmitter so that the receiver can receive a proper signal when there is a weakening factor such as a transmission characteristic of a transmission line. In this case, the main characteristics of selecting the line code include a transmission efficiency according to a coding rate, a circuit implementation for high speed operation, and the like. The code rate M / N refers to the ratio of the coded signal M to the original signal N.

IBM's 8B / 10B is a proven technology that has been applied to many existing technologies such as 1 Gigabit Ethernet, Fiber Channel, and IEEE 1394, and can be implemented at high speeds such as 10 Gigabit Ethernet. Depending on the coding rate, the bandwidth is wasted 2.5GHz (25%). The Institute of Electronics and Telecommunications Research Institute MB810 is a technology that has not been applied to any existing technology. The bandwidth according to coding rate is theoretical minimum 1 / (2T) Hz and 6.25GHz for 10 Gigabit Ethernet, which saves 3.75GHz There are disadvantages that are not optimized. Where T denotes the signal period. The 8B / 10B is adopted as the standard line code for 10 Gigabit Ethernet, and the MB810 is not adopted, but is advantageous for high speed long distance transmission compared to the 8B / 10B.

However, it cannot accommodate both systems using 10 Gigabit Ethernet and 8B / 10B as standard line codes, and systems using MB810 for high speed long-distance transmission. As a result, there was a problem such that it takes a lot of time to initialize the system.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and is detected from the encoded data without a separate signal exchange in a high-speed digital data transmission system supporting different line codes MB810 and 8B / 10B. A dual-mode encoding / decoding apparatus of line code using code detection for improving the initialization speed by determining an operation mode according to one control code, and a computer-readable recording having recorded thereon a program for realizing the method. The purpose is to provide a medium.

1 is a configuration diagram of a dual mode encoding apparatus of a line code using code detection according to the present invention.

2 is a block diagram of a dual mode decoding device of a line code using code detection according to the present invention.

3 is a state transition diagram of an IDLE control code in the encoding state diagram of the MB810 encoder shown in FIG. 1;

4 is a flowchart illustrating a dual mode decoding method of line code using code detection according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: management register 105: 8B / 10B encoder

110 MB810 encoder 120 encoding side 2: 1 multiplexer

200: synchronization detector 205: lane aligner

210: control code detector 215: MB810 decoder

220: 8B / 10B decoder 230: decoder side 2: 1 multiplexer

According to the present invention for achieving the above object, in a dual mode encoding apparatus of a line code using code detection, encoding for selectively operating the MB810 encoding means or the 8B / 10B encoding means in accordance with an encoder selection signal from the outside. Management storage means for storing a control signal and for transmitting the stored coded control signal to the MB810 encoding means and the 8B / 10B encoding means; The MB810 encoding means for encoding the 8-bit data received from the media access control (MAC) into 10-bit encoded data according to the MB810 method by operating in accordance with an encoding control signal transmitted from the management storage means; The 8B / 10B encoding means for encoding the 8-bit data received from the MAC (Media Access Control) into 10-bit encoded data according to the 8B / 10B scheme by operating in accordance with an encoding control signal transmitted from the management storage means; And encoding multiplexing means for selectively outputting the 10-bit encoded data encoded by the MB810 scheme from the MB810 encoding means or the 10-bit encoded data encoded by the 8B / 10B scheme from the 8B / 10B encoding means. The present invention provides a dual mode decoding apparatus for a line code using code detection, comprising: synchronization state detection means for detecting a synchronization state signal from the 10-bit encoded data received from the dual mode encoding means; Lane alignment means for compensating lane skew generated through circuits and lines by aligning lanes of 10-bit encoded data according to the synchronization state signal received from the synchronization state detection means; After receiving the 10-bit encoded data from the lane aligning means, a control code is detected using a predefined control code, and for selectively operating the MB810 decoding means or the 8B / 10B decoding means according to the detected control code. Control code detection means; The MB810 decoding means for decoding the 10-bit coded data by the MB810 method according to the control of the control code detecting means; And 8B / 10B decoding means for decoding the 10-bit coded data in an 8B / 10B scheme according to the control of the control code detecting means.

On the other hand, in the dual mode decoding method of the line code using code detection, after the dual mode decoding apparatus receives the encoded data from the dual mode encoding apparatus, the control code and the received 10-bit encoded data Detecting a control code by comparing the first and second control codes; A second step of decoding the 10-bit encoded data into 8-bit data according to the MB810 method if the detected control code is a control code corresponding to MB810; And a third step of decoding the 10-bit encoded data into 8-bit data according to the 8B / 10B scheme if the detected control code is a control code corresponding to 8B / 10B.

The present invention also provides a dual mode decoding apparatus having a processor, wherein the dual mode decoding apparatus receives encoded data from the dual mode encoding apparatus, and then compares the predetermined control code with the received 10 bit encoded data to control the dual mode decoding apparatus. A first function of detecting a code; A second function of decoding the 10-bit encoded data into 8-bit data according to the MB810 method if the detected control code is a control code corresponding to MB810; And if the detected control code is a control code corresponding to 8B / 10B, a computer-readable recording recording a program for realizing a third function of decoding the 10-bit encoded data into 8-bit data according to the 8B / 10B scheme. Provide the medium.

The objects, features and advantages described above will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a dual mode encoding apparatus of a line code using code detection according to the present invention.

As illustrated in FIG. 1, the dual mode encoding apparatus includes a management register 100, an MB810 encoder 105, an 8B / 10B encoder 110, and an encoding side 2: 1 multiplexer 120.

The management register 100 stores an encoder control signal for selectively operating the MB810 encoder 105 or the 8B / 10B encoder 110 according to an encoder selection signal from the outside, and stores the encoder control signal stored therein. The encoder 105 and the 8B / 10B encoder 110 are provided.

The MB810 encoder 105 operates according to an encoder control signal received from the management register 100, encodes 32-bit data of 4 lanes received from a media access control (MAC) using the M810 method, and encodes the other station through a communication line. Send to the decoding device. At this time, the idle control code included in the MB810 is defined as a value distinct from 8B / 10B, so that the corresponding decoding scheme (MB810 or 8B / 10B) can be selected from the encoded data received without a separate signal exchange at the transmitting side. To be able.

The 8B / 10B encoder 110 operates in accordance with an encoder control signal received from the management register 100 to encode 32-bit data of 4 lanes received from a media access control (MAC) by 8B / 10B. It transmits to the decoding device of the opposite station through.

That is, the MB810 encoder 105 and the 8B / 10B encoder 110 selectively operate according to the selection control signal provided from the management register 100 to encode 32-bit data of four lanes. At this time, since the encoding actually encodes 8-bit data for each lane into 10 bits, the output data is 40-bit data of 4 lanes.

The encoding side 2: 1 multiplexer 120 selects and outputs the output of the MB810 encoder 105 or the 8B / 10B encoder 110 based on a selection signal provided from the management register 110.

2 is a diagram illustrating an embodiment of a dual mode decoding apparatus for line code using code detection according to the present invention.

As shown in FIG. 2, the dual mode decoding apparatus includes a synchronization state detector 200, a lane aligner 205, a control code detector 210, an MB810 decoder 215, and an 8B / 10B decoder 220. And a decryption side 2: 1 multiplexer 230.

The synchronization state detection unit 200 receives 40-bit encoded data of 4 lanes transmitted from the dual mode encoding apparatus, detects a special control code for verifying the state of synchronization among 10-bit encoded data of each lane, and then Provided to the lane aligner 205 as a synchronization state signal. At this time, the received encoded data is encoded data transmitted from the transmitter of the other station through the communication line.

The lane aligner 205 aligns lanes to compensate for interlane lanes generated through circuits and lines according to the synchronization state signals received from the synchronization state detection unit 220.

The control code detector 210 establishes synchronization through the synchronization state detector 200 and the lane aligner 205 and performs the MB810 decoder 215 or the 8B / 10B decoder 220 from the aligned 10-bit encoded data. A decoder control signal for enabling is generated and provided to the MB810 decoder 215 and the 8B / 10B decoder 220, respectively.

Accordingly, the MB810 decoder 215 and the 8B / 10B decoder 220 operate any one decoder according to the decoder control signal provided from the control code detector 210. For example, when the MB810 decoder 215 is selected, the 10-bit encoded data is decoded into 8-bit data through the MB810 decoder 215, and the 8B / 10B decoder 220 is selected. When turned on, the 10-bit encoded data is decoded into 8-bit data through the 8B / 10B decoder 220.

That is, the control code detector 210 receives / A /, / K /, and / R which are IDLE control codes in the form of 10-bit encoded data when the synchronization state signal that is an output signal of the synchronization state detector 200 is normally received. Generates a decoder control signal for selecting a decoder from /, and provides the generated decoder control signal to the MB810 decoder 215 and the 8B / 10B decoder 220, respectively, and the decoder side 2: 1 multiplexer. Also provided at 230.

The decoding side 2: 1 multiplexer 230 selectively outputs the output of the MB810 decoder 215 or the 8B / 10B decoder 220 according to the decoder control signal received from the control code detector 210.

Herein, the control code detector 210 performs / A /, / R / code detection and / K / code detection of the MB810 decoder 215 to select a decoder to operate, and the 8B / 10B decoder ( The / A /, / R / codes of 220 are detected, and the code detection is possible by comparing the predefined control code with the received 10-bit encoded data. That is, the idle control code required for the initialization process is defined in the 8B / 10B. The idle control code of the MB810 is defined as a different value from the 8B / 10B so as to be distinguished from each other. It must also be promised at the receiving end.

Table 1 below is a definition table of IDLE control codes encoded with 10 bits by the 8B / 10B line code and the MB810 line code.

IDLE code group 8B / 10B code MB810 code / A / 1100111100 0011000011 0100101111 1011010000 / K / 0101111100 1010000011 0101111100 1010000011 / R / 0010111100 1101000011 0011110011 1100001100

As shown in Table 1, / A / and / R / of MB810 are codes for distinguishing dual-mode decoding, and / A / and / R / of 8B / 10B and Hamming Distance of 3 or more. The difference prevents code errors that can occur when bit errors occur. In addition, the / K / code of the MB810 may share a serializer / deserializer circuit using a comma 1111100 or 000001111 included therein at the same value as 8B / 10B. Here, "//" in the / A /, / R / and / K / means a 10-bit code.

3 is a state transition diagram of an IDLE control code in the encoding state diagram of the MB810 encoder illustrated in FIG. 1.

That is, as shown in FIG. 3, the 12 stakes used in the encoding state diagram of the MB810 encoder output 10-bit encoded data, and then transition to the next state accordingly. Since the MB810 encoder is state dependent, random control codes (/ A /, / K /, / R /) must be cycled through S1, S2, S3, S10, S11, and S12. Here, S1 to S12 mean states, and the state transition of the next state in each state is bidirectional.

Here, the state transition of the MB810 encoder will be described in detail through the state transition table of the MB810 IDLE control code shown in Table 2 below.

IDLE code group 10-bit encoded data Current Status S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 / A / 0100101111 S2 S3 S4 S6 S7 S8 S10 S11 S12 1011010000 S1 S2 S3 S5 S6 S7 S9 S10 S11 / K / 0101111100 S10 S11 S12 1010000011 S1 S2 S3 / R / 0011110011 S2 S3 S4 S6 S7 S8 S10 S11 S12 1100001100 S1 S2 S3 S5 S6 S7 S9 S10 S11

The IDLE control codes / A /, / K /, / R / of the MB810 incubator state transition at S1, S2, S3, S10, S11 and S12 on the state diagram as shown in FIG.

At this time, the control codes / A / and / R / transition to the right direction of (S2, S3) when the current state is (S1, S2), and the right of (S11, S12) when (S10, S11). To transition. Then, in the case of (S2, S3), it moves in the left direction of (S1, S2), and in the case of (S11, S12), it moves in the left direction of (S10, S11), respectively. On the other hand, the control code / K / transitions upwards to (S10, S11, S12) when the current state is (S1, S2, S3), and (S1, S2, S12) when (S10, S11, S12). Transition to the downward direction of S3).

4 is a flowchart illustrating a dual mode decoding method of a line code using code detection according to the present invention.

As shown in FIG. 4, the control code detection logic 210 determines whether the synchronization status signal received through the synchronization status detector 200 and the lane aligner 205 is FALSE or a reset signal is input (401). .

As a result of the determination 401, if the received synchronization state signal is FALSE or a reset signal is input, after the decoder control signal for selecting a decoder is initialized to "0", the MB810 decoder 215, 8B / 10B decoder 220 and decoder 2: 1 multiplexer 230 (402).

On the other hand, if the received synchronization state signal is not FALSE and the reset signal is not input, the determination result 401 receives 10-bit encoded data (403). Then, it is determined whether the received 10-bit encoded data is / A / or / R / of the MB810 (404).

As a result of the determination 404, when the received 10-bit encoded data is / A / or / R / of the MB810, the state transitions to the MB810 control code detection state (405), the MB810 decoder 215 is enabled, and the decoding side The control signal of the 2: 1 multiplexer 230 is set to 1 (406). At this time, the decoder 2: 1 multiplexer 230 outputs the output from the MB810 decoder 215 when the decoder control signal received from the control code detector 210 is 0, and if it is 1, the 8B / 10B decoder. Output the output from 220. It is determined whether the current synchronization state is maintained (407), and if the synchronization state is continuously maintained, the process returns to the process 405 of transitioning to the MB810 control code detection state and continues to maintain the current state.

On the other hand, when the determination result 404 indicates that the received 10-bit encoded data is not / A / or / R / of MB810, the received 10-bit encoded data is / A / or / R / of 8B / 10B. (408), if the received 10-bit encoded data is / A / or / R / of 8B / 10B, the state transitions to the B8 / 10B control code detection state (409), and the B8 / 10B decoder is checked. The control signal of the decoding side 2: 1 multiplexer is set to 0 (410). Then, it is determined whether the current synchronization state is maintained (411), and if the synchronization state is continuously maintained, the process returns to the process 409 of transitioning to the B8 / 10B control code detection state to maintain the current state.

On the other hand, when the determination result 408, the received 10-bit encoded data is not / A / or / R / of 8B / 10B, it is determined whether the received 10-bit encoded data is / K / (412), In the case of / K /, the initial value is maintained (413), and in the case of / K /, the loop ends.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the stated embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, the present invention can accommodate both a system using 10 Gigabit Ethernet and 8B / 10B as a standard line code, and a system using MB810, which is advantageous for high-speed long-distance transmission, without going through a procedure for setting a separate environment. Using the code detection state diagram, it is possible to simply determine by decoding to the dual mode.

Claims (7)

In the dual mode encoding apparatus of the line code using code detection, Encoding control signals for selectively operating the MB810 encoding means or the 8B / 10B encoding means in accordance with an encoder selection signal from the outside, and storing the stored encoding control signals to the MB810 encoding means and the 8B / 10B encoding means. Management storage means for delivery; The MB810 encoding means for encoding the 8-bit data received from the media access control (MAC) into 10-bit encoded data according to the MB810 method by operating in accordance with an encoding control signal transmitted from the management storage means; The 8B / 10B encoding means for encoding the 8-bit data received from the MAC (Media Access Control) into 10-bit encoded data according to the 8B / 10B scheme by operating in accordance with an encoding control signal transmitted from the management storage means; And Encoding multiplexing means for selectively outputting 10-bit encoded data encoded by the MB810 scheme from the MB810 encoding means or 10-bit encoded data encoded by the 8B / 10B scheme from the 8B / 10B encoding means Dual mode encoding apparatus of the line code using code detection comprising a. The method of claim 1, The encoding process in the MB810 encoding means, A code characterized in that the data received from the MAC (Media Access Control) is encoded according to the MB810 method, including the idle control code (IDLE), which is distinguished from the control code required for the initialization process defined in 8B / 10B Dual mode encoding apparatus using line detection using detection. In the dual-mode decoding device of the line code using code detection, Synchronization state detection means for detecting a synchronization state signal from the 10-bit encoded data received from the dual mode encoding means; Lane alignment means for compensating lane skew generated through circuits and lines by aligning lanes of 10-bit encoded data according to the synchronization state signal received from the synchronization state detection means; After receiving the 10-bit encoded data from the lane aligning means, a control code is detected using a predefined control code, and for selectively operating the MB810 decoding means or the 8B / 10B decoding means according to the detected control code. Control code detection means; The MB810 decoding means for decoding the 10-bit coded data by the MB810 method according to the control of the control code detecting means; And 8B / 10B decoding means for decoding the 10-bit coded data in an 8B / 10B scheme according to the control of the control code detecting means. Dual mode decoding device of the line code using the code detection comprising a. The method of claim 3, wherein The predefined control code is, An IDLE control code required for an initialization process is defined so that the MB810 method and the 8B / 10B method are distinguished from each other. In the dual mode decoding method of line code using code detection, A first step of the dual mode decoding apparatus receiving encoded data from the dual mode encoding apparatus and then comparing the predefined control code with the received 10 bit encoded data to detect a control code; A second step of decoding the 10-bit encoded data into 8-bit data according to the MB810 method if the detected control code is a control code corresponding to MB810; And A third step of decoding the 10-bit encoded data into 8-bit data according to the 8B / 10B scheme if the detected control code is a control code corresponding to 8B / 10B. Dual mode decoding method of line code using code detection comprising a. In a dual-mode decoding device having a processor, A first function of detecting, by the dual mode decoding apparatus after receiving the encoded data from the dual mode encoding apparatus, a control code by comparing a predetermined control code with the received 10 bit encoded data; A second function of decoding the 10-bit encoded data into 8-bit data according to the MB810 method if the detected control code is a control code corresponding to MB810; And A third function of decoding the 10-bit encoded data into 8-bit data according to the 8B / 10B scheme if the detected control code is a control code corresponding to 8B / 10B. A computer-readable recording medium having recorded thereon a program for realizing this. delete