WO2016098742A1 - 送信装置、通信装置および信号伝送システム - Google Patents
送信装置、通信装置および信号伝送システム Download PDFInfo
- Publication number
- WO2016098742A1 WO2016098742A1 PCT/JP2015/084977 JP2015084977W WO2016098742A1 WO 2016098742 A1 WO2016098742 A1 WO 2016098742A1 JP 2015084977 W JP2015084977 W JP 2015084977W WO 2016098742 A1 WO2016098742 A1 WO 2016098742A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- information
- unit
- frame
- signal
- information sequence
- Prior art date
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 title claims description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims description 33
- 238000000926 separation method Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 description 18
- 230000003287 optical effect Effects 0.000 description 15
- 238000001514 detection method Methods 0.000 description 9
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000284 extract Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000013500 data storage Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/14—Conversion to or from non-weighted codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes
- H04L25/4908—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
Definitions
- the present invention relates to a transmission device, a communication device, and a signal transmission system that multiplex and transmit a plurality of information series.
- CPRI Common Public Radio Interface
- Optical Transport Network which is a transmission standard for optical communications, can accommodate a wide variety of client signals, and can improve signal transmission quality by adding parity for error correction. is there.
- Non-Patent Document 1 2.458 Gbit / s CPRI option 3, 3.072 Gbit / s CPRI option 4 and the like using a Generic Mapping Procedure (GMP) in an Optical channel Transport Unit (OTU) frame.
- GMP Generic Mapping Procedure
- OFT Optical channel Transport Unit
- the CPRI signal uses an 8B10B code as a transmission line code.
- the 8B10B code is decoded and transmitted, so that the bandwidth in the OTN section is 4 A method of compressing to / 5 is being studied. For example, in the case where four 2.4576 Gbit / s “CPRI option 3” signals are multiplexed, a bandwidth of 9.8304 Gbit / s is required to multiplex without decoding, whereas multiplexing is performed after decoding. In this case, the signal is compressed to 7.8463 Gbit / s, so that more signals can be multiplexed and the transmission distance can be extended.
- the CPRI signal is composed of a 66.67 microsecond long hyperframe, and the 8B10B code K28.5 code is used as the synchronization byte at the head of the frame.
- the K28.5 code is the only code in which a special 10-bit sequence called a comma pattern appears in the 8B10B code. Normally, the receiver of the CPRI signal detects this K28.5 code four times in the data string. By doing so, the head of the frame is identified.
- the K28.5 code is converted from the comma pattern to 8 bits indistinguishable from other data at the time of decoding, and the leading information of the CPRI signal Will be lost. Therefore, multiplexing is performed so that the frame head of each decoded CPRI signal matches the head position of the OTU frame on the transmission side, so that the reception side can identify the head of the CPRI frame.
- the present invention has been made in view of the above, and an object of the present invention is to provide a transmission apparatus capable of preventing an increase in a necessary band and a transmission delay time when an 8B10B encoded signal is multiplexed and transmitted.
- the present invention is a transmitting apparatus that multiplexes and transmits a plurality of encoded information sequences, decoding each of the plurality of information sequences, Receiving one of a plurality of subsequent information sequences, scrambled the received information sequence, and adding a synchronization pattern indicating the head of the frame to each scrambled information sequence and outputting the information sequence;
- the figure which shows an example of the process which the conversion part of Embodiment 1 performs with respect to an information series Flowchart showing an operation example of the pattern adding unit
- the figure which shows the method of multiplexing without applying this invention Flowchart showing an operation example of the frame synchronization unit
- Flow chart showing an example of operation of the overhead generator A flowchart showing an operation example of the overhead termination unit
- FIG. 1 is a diagram illustrating a configuration example of the signal transmission system according to the first exemplary embodiment of the present invention.
- the signal transmission system shown in FIG. 1 multiplexes and transmits an 8B10B encoded information sequence.
- This signal transmission system transmits, for example, a common public radio interface (CPRI) signal between an antenna device and a baseband signal processing device in a mobile fronthaul of a mobile communication system.
- CPRI common public radio interface
- the signal transmission system receives a plurality of information sequences # 1, # 2, and # 3, multiplexes each information sequence, and transmits it to the optical transmission line 3. 1 and the signal transmitted from the transmitter 1 are received from the optical transmission line 3, and the multiplexed information sequence is returned to the information sequences # 1, # 2, and # 3 before being multiplexed and output.
- the apparatus 2 is comprised.
- the optical transmission line 3 is an optical fiber.
- Information sequences # 1, # 2, and # 3 are 8B10B encoded, and are CPRI signals when the signal transmission system is applied to a mobile fronthaul of a mobile communication system.
- the information sequences # 1, # 2, and # 3 are transmitted and received between a baseband signal processing device and an antenna device (not shown). That is, the information sequences # 1, # 2, and # 3 are input from the baseband signal processing apparatus to the transmission apparatus 1 and output from the reception apparatus 2 to the antenna apparatus. Alternatively, the signal is input from the antenna device to the transmission device 1 and is output from the reception device 2 to the baseband signal processing device.
- the number of multiplexed information sequences to be transmitted is 3, but this is an example, and the number of multiplexing is not limited to this. In the following description, it is assumed that the information sequences # 1, # 2, and # 3 are CPRI signals.
- Transmitter 1 information sequence #n (n 1,2,3) and the converter unit 10 n to generate less information sequence of conversion to the information amount, the information after the conversion in each of the conversion unit 10 n
- a multiplexing unit that receives and multiplexes the sequence and transmits the multiplexed signal as a multiplexed signal to the receiving device 2 via the optical transmission line 3.
- Each of the conversion units 10 n includes an 8B10B decoding unit 11 n that decodes the information sequence #n, a scramble unit 12 n that receives and scrambles the information sequence decoded by the 8B10B decoding unit 11 n , and a scramble unit 12 n. And a pattern adding unit 13 n for adding a synchronization pattern, which is a fixed bit pattern indicating the head of the frame, to the information sequence after being scrambled by.
- the receiving apparatus 2 performs frame synchronization processing, which will be described later, on the input information series, and performs processing that is the reverse of the processing performed by the 8B10B decoding unit 11 n and the scramble unit 12 n of the transmitting apparatus 1
- the inverse conversion unit 20 n that restores the information sequence #n before being converted by the conversion unit 10 n of the device 1 and the multiplexed signal transmitted from the multiplexing unit 14 of the transmission device 1 are received and multiplexed by the multiplexing unit 14 And a separation unit 24 for returning to the information series before being converted.
- Each of the inverse transform units 20 n is reverse to the processing executed by the 8B10B encoding unit 21 n that performs 8B10B encoding on the input information sequence, and the scrambling unit 12 n of the transmission device 1 on the input information sequence.
- FIG. 2 is a diagram illustrating an example of processing executed on the information sequence #n input by the conversion unit 10 n of the transmission device 1.
- An information sequence #n such as a CPRI frame that is input to the conversion unit 10 n has a fixed frame length that is 8B10B encoded. As shown in FIG. A bit K28.5 code, that is, a synchronization pattern is inserted.
- the 8B10B decoding unit 11 n decodes the 8B10B-encoded information sequence #n, which is an input signal, and converts the 10-bit information sequence into an 8-bit information sequence.
- the scrambler 12 n is an information sequence obtained by excluding each 8 bits corresponding to the insertion position of each K28.5 code from the information sequence #n decoded by the 8B10B decoding unit 11 n , that is, a K28.5 code.
- the scramble method for example, a method of taking an exclusive OR of an information sequence to be scrambled and a pseudo random pattern is used. Other scrambling methods may be used.
- the pattern adding unit 13 n has specific 8 bits for the predetermined position of the information sequence #n after being scrambled by the scrambler 12 n , specifically, the position corresponding to the insertion position of each K28.5 code, For example, a fixed bit sequence such as “11110110” shown in FIG. 2B is inserted as a synchronization pattern.
- FIG. 3 is a flowchart showing an operation example of the pattern adding unit 13 n .
- the pattern adding unit 13 n checks whether or not it is the insertion position of the K28.5 code (step S11). If it is not the insertion position of the K28.5 code (step S11: No), the pattern adding unit 13 n continues the process of step S11.
- the pattern adding unit 13 n detects the insertion position of the K28.5 code (step S11: Yes)
- the pattern adding unit 13 n inserts an 8-bit fixed bit sequence at the detected insertion position (step S12). After executing step S12, the pattern adding unit 13 n returns to step S11 and continues the process.
- the synchronization pattern inserted by the pattern adding unit 13 n may use a hexadecimal “BC” that is a result obtained by 8B10B decoding “00111111010” that is a K28.5 code. That is, “10111100” may be used as the synchronization pattern. Further, a multi-frame configuration in which the value of the synchronization pattern is changed at a constant period based on the CPRI frame length may be employed.
- FIG. 4 is a diagram illustrating an example of processing in which the multiplexing unit 14 multiplexes the information sequences # 11, # 12, and # 13 output from the pattern adding units 13 1 , 13 2, and 13 3 to generate a multiplexed signal. It is.
- the multiplexing unit 14 sequentially stores the data storage area that is the payload of the OTU frame To store. That is, the multiplexing unit 14 stores the input information sequences # 11, # 12, and # 13 immediately in the data storage area of the OTU frame without giving a delay. At this time, the heads of the frames of each information series, that is, the heads of the frames of each information series stored in the OTU frame may not be aligned. This is because the receiving device 2 side can detect the head of the frame based on the synchronization pattern included in the received signal.
- FIG. 5 is a diagram illustrating a method for multiplexing CPRI signals without applying the present invention. As shown in FIG. 5, the heads of the frames of the information sequences # 21, # 22, and # 23 that are CPRI signals that are 8B10B-decoded are not necessarily input to the block that performs the multiplexing process. A time difference corresponding to the frame length occurs at the maximum when the frame is input.
- the information sequences # 21, # 22, and # 23 are individually delayed to obtain information sequences # 21 ′, # 22 ′, and # 23 ′, thereby aligning the phases of the information sequences. Need to be stored in the OTU frame. For example, when the information series is a CPRI signal, a maximum waiting time of 66.67 microseconds is generated in order to match the head of the OTU frame. When the present invention is not applied, information indicating the beginning of the frame is not included in each information sequence to be multiplexed. Therefore, by storing the beginning of the frame of each information sequence at the beginning of the OTU frame, It is necessary to be able to detect the head of the frame.
- the data is transferred to the frame synchronization unit 23 n of the conversion unit 20 n .
- the frame synchronization unit 23 n continuously detects the synchronization pattern provided by the pattern addition unit 13 n of the transmission device 1 to detect the head of the frame.
- the information series is a CPRI signal
- the head of the frame is detected by detecting the synchronization pattern four times in succession.
- the frame synchronization unit 23 n can recognize the frame head of the information sequence # 1n.
- the descrambling unit 22 n descrambles the information sequence # 1n based on the head of the frame detected by the frame synchronization unit 23 n . That is, descrambling is performed on the part excluding the synchronization pattern, and the information sequence before being scrambled by the scrambler 12 n of the transmission apparatus 1 is restored.
- FIG. 6 is a flowchart showing an operation example of the frame synchronization unit 23 n .
- the frame synchronization unit 23 n checks whether or not it corresponds to an 8-bit fixed bit sequence indicating a synchronization pattern (step S21). When it does not correspond to the synchronization pattern (step S21: No), the frame synchronization unit 23 n continues the process of step S21. On the other hand, if it corresponds to the synchronization pattern (step S21: Yes), the frame synchronization unit 23 n checks whether the synchronization pattern has been detected four times in succession, that is, whether the synchronization pattern has been continuously detected four times. (Step S22).
- the frame synchronizer 23 n continues the synchronization pattern when the number obtained by adding 1 to the stored continuous detection count is 4, that is, when the synchronization pattern is detected when the stored continuous count is three. It is determined that the number of detections has reached 4.
- the frame synchronization unit 23 n stores the number of continuous detections (step S24), returns to step S21, and continues the processing.
- the frame synchronization unit 23 n determines that it is the head of the frame (step S23).
- the frame synchronization unit 23 n After executing step S23, the frame synchronization unit 23 n returns to step S21 and continues processing. Note that the frame synchronization unit 23 n determines that the synchronization pattern is continuously detected when the detection interval of the synchronization pattern is a time interval assumed in advance.
- the “predetermined time interval” is an interval at which the pattern adding unit 13 n of the transmission device 1 inserts a synchronization pattern.
- the frame synchronization unit 23 n detects that the continuous detection of the synchronization pattern is interrupted, that is, a time longer than the above-mentioned “preliminarily assumed time interval” after detecting the synchronization pattern, If the synchronization pattern is not detected over the time obtained by adding a margin to the “time interval”, the stored continuous detection count is updated to zero.
- the frame synchronization unit 23 n starts, for example, when a synchronization pattern is detected, and counts a time obtained by adding a certain time (corresponding to the above margin) to a time corresponding to the above “previously assumed time interval”.
- step S21 when it is determined as “Yes” in step S21, a count operation is started, and a timer that expires when a certain time elapses after the time corresponding to the above “predetermined time interval” elapses.
- the timer expires, the stored continuous detection count is updated to zero.
- the “certain time” is a time shorter than the “predetermined time interval”. If the frame synchronization unit 23 n detects a synchronization pattern before the timer expires, the frame synchronization unit 23 n restarts the timer.
- the 8B10B encoding unit 21 n performs 8B10B encoding on the information sequence that has been descrambled by the descrambling unit 22 n , and restores and outputs the original information sequence #n.
- the transmitting apparatus 1 decodes a plurality of 8B10B-encoded information sequences, and further multiplexes and transfers the information, for each information sequence, the beginning of the frame.
- the codeword indicating the head of the frame is replaced with a synchronization pattern, and the receiving device 2 detects the synchronization pattern inserted in each received information sequence, Specify the frame head.
- the transmission apparatus 1 replaces the code indicating the frame head with the synchronization pattern, so that the reception apparatus 2 can detect the frame head by aligning the heads of the frames to be multiplexed and storing them in the OTU frame. There is no need to make it. Therefore, it is possible to prevent an increase in necessary bandwidth and transmission delay time when a plurality of 8B10B encoded information sequences are multiplexed and transmitted.
- the present invention can also be applied to a case where information sequences subjected to other encoding are multiplexed and transmitted.
- FIG. FIG. 7 is a diagram illustrating a configuration example of a signal transmission system according to the second exemplary embodiment of the present invention.
- the signal transmission system according to the present embodiment is obtained by replacing the transmission device 1 and the reception device 2 of the signal transmission system according to the first embodiment shown in FIG. 1 with a transmission device 1a and a reception device 2a.
- the transmission device 1 a is obtained by adding an overhead generation unit 15 to the transmission device 1.
- the receiving device 2a adds an overhead termination unit 25 to the receiving device 2, further replaces the separating unit 24 with a separating unit 24a, and converts the inverse transforming units 20 1 , 20 2 and 20 3 into inverse transforming units 20a 1 , 20a 1 , 20a 2 and 20a 3 are replaced.
- Inverse transform unit 20a 1, 20a 2 and 20a 3 are replaced by the inverse transform unit 20 1, 20 2 and 20 3 of the frame synchronization unit 23 1, 23 2 and 23 3 the frame synchronization unit 23a 1, 23a 2 and 23a 3 It is a thing.
- FIG. 7 the same reference numerals are given to the portions common to the signal transmission system of the first embodiment shown in FIG. 1. A description of portions common to the signal transmission system of Embodiment 1 is omitted.
- the overhead generation unit 15 adds overhead including synchronization pattern information to the OTU frame that is the multiplexed frame generated by the multiplexing unit 14. That is, the overhead generation unit 15 generates an overhead including the same bit string as the 8-bit synchronization pattern inserted in the information sequence multiplexed and transmitted in the OTU frame, adds the overhead to the OTU frame, and passes through the optical transmission line 3. Transmit to the receiver 2a.
- FIG. 8 is a flowchart showing an operation example of the overhead generator 15.
- the overhead generation unit 15 monitors whether or not an OTU frame has been input (step S31), and if there is no input (step S31: No), continues the monitoring operation.
- the overhead generation unit 15 adds the overhead including the synchronization pattern information, that is, the 8-bit fixed bit sequence information indicating the synchronization pattern, to the OTU frame and outputs it. (Step S32). After executing step S32, the overhead generator 15 returns to step S31 and continues the processing.
- the synchronization pattern information that is, the 8-bit fixed bit sequence information indicating the synchronization pattern
- the overhead termination unit 25 when the overhead termination unit 25 receives the OTU frame, the overhead termination unit 25 removes the overhead added by the overhead generation unit 15, and passes the OTU frame to the demultiplexing unit 24a together with the synchronization pattern information included in the overhead.
- FIG. 9 is a flowchart showing an operation example of the overhead termination unit 25.
- the overhead termination unit 25 monitors whether or not an OTU frame has been input (step S41), and when there is no input (step S41: No), continues the monitoring operation.
- the overhead terminating unit 25 removes the overhead from the OTU frame (step S42), further extracts the synchronization pattern information from the overhead, and acquires the synchronization pattern information and overhead removal.
- the subsequent OTU frame is output (step S43). After executing step S43, the overhead terminating unit 25 returns to step S41 and continues the processing.
- Frame synchronization unit 23a n of the inverse transform unit 20a n using the information of the synchronization pattern received from the separating unit 24a, for detecting the frame head information sequence # 1n. Operation of the frame synchronization portion 23a n, when detecting the synchronization pattern in step S21 shown in FIG. 6, except using the information of the synchronization pattern received from the separating unit 24a, the frame synchronization unit of the first embodiment This is the same as 23 n .
- the transmitting apparatus 1a decodes a plurality of 8B10B-encoded information sequences, and further multiplexes and transfers the information, the frame head for each information sequence. Data other than the indicated code word is scrambled, and the code word indicating the head of the frame is replaced with a synchronization pattern.
- synchronization pattern information is added to the multiplexed signal obtained by multiplexing the information series and transmitted.
- the receiving device 2a determines the synchronization pattern inserted in each received information sequence by using the synchronization pattern information added to the multiplexed signal, and identifies the frame head of each information sequence. Thereby, even if the receiving apparatus 2a does not know the synchronization pattern in advance, the frame head of the information sequence can be specified, and the same effect as in the first embodiment can be obtained. Also, the synchronization pattern to be used can be changed as appropriate.
- Embodiment 3 the transmission side of the information sequence adds the fixed pattern information to the OTU frame and transmits it to notify the reception side of the fixed pattern information inserted in the information sequence.
- information on the fixed pattern is notified to the reception side using another method.
- the configuration of the signal transmission system according to the present embodiment is the same as that of the first embodiment.
- Frame synchronization unit 23 n of the inverse transform unit 20 n, using the information of the synchronization pattern received from the separating unit 24 detects the frame head information sequence # 1n.
- the transmitting apparatus 1 decodes a plurality of 8B10B-encoded information sequences, and further multiplexes and transfers the information, the frame head for each information sequence. Data other than the indicated code word is scrambled, and the code word indicating the head of the frame is replaced with a synchronization pattern. Also, synchronization pattern information is stored in a fixed stuff area of a multiplexed signal obtained by multiplexing information sequences and transmitted. The receiving device 2 uses the synchronization pattern information included in the multiplexed signal to determine the synchronization pattern inserted in each received information sequence, and specifies the frame head of each information sequence.
- the receiving apparatus 2 does not know the synchronization pattern in advance, it is possible to specify the head of the frame of the information sequence, and the same effect as in the first embodiment can be obtained. Also, the synchronization pattern to be used can be changed as appropriate. Further, it is possible to notify the receiving side of the synchronization pattern while suppressing an increase in the amount of data to be transmitted.
- the signal transmission system configured to transmit the information sequence from the transmission device to the reception device by arranging the transmission device and the reception device at both ends of the optical transmission path. It is good also as a signal transmission system of the composition which transmits an information sequence mutually between the provided communication apparatuses.
- a communication device including both the transmission device and the reception device described in Embodiment 1 may be arranged at both ends of the optical transmission path so that two communication devices transmit signals to each other.
- the 8B10B decoding unit 11 n of the transmission devices 1 and 1a is realized by a decoder, and the scrambler 12 n is realized by a scrambler.
- the multiplexing unit 14 is realized by a multiplexer.
- the 8B10B encoding unit 21 n of the receiving apparatuses 2 and 2a is realized by a coder, and the descrambling unit 22 n is realized by a descrambler.
- Separators 24 and 24a are realized by a demultiplexer.
- the illustrated processing circuit 100 that is, the processor 101, the memory 102, the input unit 103, and the output unit 104 is realized.
- the processor 101 is a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, processor, DSP), system LSI (Large Scale Integration), or the like.
- the memory 102 is a nonvolatile or volatile semiconductor such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), etc. Memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), etc.
- Pattern adding section 13 n of 1,1a transmission device, the transmission device 1a overhead generation section 15, the frame synchronization unit 23 n of the receiving apparatus 2, the frame synchronization section 23a n of the receiving device 2a, the overhead termination section 25 includes a processor 101 and This is realized by a program stored in the memory 102. Specifically, it is realized by the processor 101 reading a program for operating as each of these units from the memory 102 and executing it.
- the input unit 103 is an electronic circuit for receiving signals from other processing circuits. For example, when the processing circuit 100 constitutes the pattern adding unit 13 n , the input unit 103 receives the signal output from the scramble unit 12 n .
- the output unit 104 is an electronic circuit for passing a signal to another processing circuit. For example, when the processing circuit 100 constitutes the pattern adding unit 13 n , the output unit 104 delivers the signal with the synchronization pattern inserted to the multiplexing unit 14.
- the 8B10B decoding unit 11 n , the scramble unit 12 n , the 8B10B encoding unit 21 n and the descrambling unit 22 n can also be realized by the processing circuit 100 shown in FIG.
- the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Theoretical Computer Science (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
図1は、本発明の実施の形態1にかかる信号伝送システムの構成例を示す図である。図1に示した信号伝送システムは、8B10B符号化されている情報系列を多重化して伝送するものである。この信号伝送システムは、例えば、移動体通信システムのモバイルフロントホールにおいて、Common Public Radio Interface(CPRI)信号をアンテナ装置とベースバンド信号処理装置の間で伝送する。
図7は、本発明の実施の形態2にかかる信号伝送システムの構成例を示す図である。本実施の形態に係る信号伝送システムは、図1に示した実施の形態1にかかる信号伝送システムの送信装置1および受信装置2を送信装置1aおよび受信装置2aに置き換えたものである。また、送信装置1aは、送信装置1に対してオーバヘッド生成部15を追加したものである。受信装置2aは、受信装置2に対してオーバヘッド終端部25を追加し、さらに、分離部24を分離部24aに置き換えるとともに、逆変換部201、202および203を逆変換部20a1、20a2および20a3に置き換えたものである。逆変換部20a1、20a2および20a3は、逆変換部201、202および203のフレーム同期部231、232および233をフレーム同期部23a1、23a2および23a3に置き換えたものである。図7においては、図1に示した実施の形態1の信号伝送システムと共通の部分に同じ符号を付している。実施の形態1の信号伝送システムと共通の部分については説明を省略する。
実施の形態2では、情報系列の送信側が固定パタンの情報をOTUフレームに付加して送信することにより、情報系列に挿入している固定パタンの情報を受信側に通知することとしたが、本実施の形態では、他の方法を使用して固定パタンの情報を受信側に通知する。本実施の形態にかかる信号伝送システムの構成は実施の形態1と同様である。
Claims (11)
- 符号化された複数の情報系列を多重化して伝送する送信装置であって、
前記複数の情報系列の各々を復号し、復号後の複数の情報系列の中の一つを受け取り、受け取った情報系列をスクランブルするとともに、スクランブル後の各情報系列にフレームの先頭を示す同期パタンを付加して出力する、前記複数の情報系列と同数の変換部と、
前記変換部の各々から出力される情報系列を多重化する多重部と、
を備えることを特徴とする送信装置。 - 前記多重部から出力される多重化信号に対して前記同期パタンである固定ビットパタンを含んだオーバヘッドを付加するオーバヘッド生成部、
をさらに備えることを特徴とする請求項1に記載の送信装置。 - 前記多重部は、前記変換部の各々から出力される情報系列を、固定スタッフ領域を有するフレームのペイロードに格納し、前記同期パタンである固定ビットパタンを前記固定スタッフ領域に格納して多重化信号を生成することを特徴とする請求項1に記載の送信装置。
- 前記情報系列を8B10B符号化された情報系列とする、
ことを特徴とする請求項1、2または3に記載の送信装置。 - 前記情報系列をCommon Public Radio Interface信号とする、
ことを特徴とする請求項1、2または3に記載の送信装置。 - 請求項1から5のいずれか一つに記載の送信装置を備えることを特徴とする通信装置。
- 送信装置および受信装置を備え、符号化された複数の情報系列を多重化して伝送する信号伝送システムであって、
前記送信装置は、
前記複数の情報系列の各々を復号し、復号後の複数の情報系列の中の一つを受け取り、受け取った情報系列をスクランブルするとともに、スクランブル後の各情報系列にフレームの先頭を示す同期パタンを付加して出力する、前記複数の情報系列と同数の変換部と、
前記変換部の各々から出力される情報系列を多重化して多重化信号を生成し、生成した多重化信号を前記受信装置へ送信する多重部と、
を備え、
前記受信装置は、
前記多重化信号を受信し、前記多重部で多重化される前の複数の情報系列に分離して出力する分離部と、
前記分離部から出力される前記複数の情報系列の中の一つを受け取り、受け取った情報系列に対して、前記同期パタンに基づきフレームの先頭を検出するフレーム同期処理を行うとともに、デスクランブルおよび符号化を行う、前記分離部から出力される情報系列と同数の逆変換部と、
を備えることを特徴とする信号伝送システム。 - 前記送信装置は、
前記多重部から出力される多重化信号に対して前記同期パタンである固定ビットパタンを含んだオーバヘッドを付加するオーバヘッド生成部、
をさらに備え、
前記分離部は、受信した多重化信号に付加されている前記固定ビットパタンを前記逆変換部の各々へ通知し、
前記逆変換部の各々は、前記分離部から通知された前記固定ビットパタンに基づいて前記フレーム同期処理を行う、
ことを特徴とする請求項7に記載の信号伝送システム。 - 前記多重部は、前記変換部の各々から出力される情報系列を、固定スタッフ領域を有するフレームのペイロードに格納し、前記同期パタンである固定ビットパタンを前記固定スタッフ領域に格納して前記多重化信号を生成し、
前記分離部は、受信した多重化信号の固定スタッフ領域に格納されている前記固定ビットパタンを前記逆変換部の各々へ通知し、
前記逆変換部の各々は、前記分離部から通知された前記固定ビットパタンに基づいて前記フレーム同期処理を行う、
ことを特徴とする請求項7に記載の信号伝送システム。 - 前記情報系列を8B10B符号化された情報系列とし、
前記逆変換部が行う符号化を8B10B符号化とする、
ことを特徴とする請求項7、8または9に記載の信号伝送システム。 - 前記情報系列をCommon Public Radio Interface信号とし、
前記逆変換部が行う符号化を8B10B符号化とする、
ことを特徴とする請求項7、8または9に記載の信号伝送システム。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15869947.0A EP3188400B1 (en) | 2014-12-15 | 2015-12-14 | Transmitting device, communication device and signal transmission system |
CN201580066878.8A CN107005398B (zh) | 2014-12-15 | 2015-12-14 | 发送装置、通信装置和信号传输系统 |
US15/516,530 US10069585B1 (en) | 2014-12-15 | 2015-12-14 | Transmission device, communication device and signal transmission system |
JP2016564849A JP6180664B2 (ja) | 2014-12-15 | 2015-12-14 | 送信装置、通信装置および信号伝送システム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-253360 | 2014-12-15 | ||
JP2014253360 | 2014-12-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016098742A1 true WO2016098742A1 (ja) | 2016-06-23 |
Family
ID=56126631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/084977 WO2016098742A1 (ja) | 2014-12-15 | 2015-12-14 | 送信装置、通信装置および信号伝送システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US10069585B1 (ja) |
EP (1) | EP3188400B1 (ja) |
JP (1) | JP6180664B2 (ja) |
CN (1) | CN107005398B (ja) |
WO (1) | WO2016098742A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020519062A (ja) * | 2017-04-11 | 2020-06-25 | フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ | 送信機および受信機並びに対応する方法 |
CN113746587A (zh) * | 2020-05-29 | 2021-12-03 | 深圳市中兴微电子技术有限公司 | 一种时间戳信息传输方法、装置、设备和存储介质 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111373838B (zh) * | 2017-11-24 | 2022-07-19 | 华为技术有限公司 | 一种传输上行信号的方法、基站及系统 |
CN109257117A (zh) * | 2018-09-26 | 2019-01-22 | 郑州云海信息技术有限公司 | 一种通用公共无线接口测试方法和系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5552651A (en) * | 1978-10-12 | 1980-04-17 | Nec Corp | Modulator and demodulator |
JPH01256832A (ja) * | 1988-04-07 | 1989-10-13 | Fujitsu Ltd | 同期多重化制御方式 |
WO2012049815A1 (ja) * | 2010-10-12 | 2012-04-19 | パナソニック株式会社 | 送信回路、受信回路、送信方法、受信方法、通信システム及びその通信方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05292050A (ja) * | 1992-04-07 | 1993-11-05 | Hitachi Ltd | Sdh伝送システム |
JP3414659B2 (ja) * | 1998-12-22 | 2003-06-09 | 日本電信電話株式会社 | 多重化方式 |
US7095758B2 (en) * | 2000-06-16 | 2006-08-22 | Nippon Telegraph And Telephone Corporation | Multiplexing and transmission apparatus |
JP4878648B2 (ja) * | 2010-03-12 | 2012-02-15 | 日本電信電話株式会社 | クライアント信号収容多重装置及び方法 |
WO2011151914A1 (ja) | 2010-06-03 | 2011-12-08 | 富士通株式会社 | 同期確立方法、受信装置及び送信装置 |
CN102025448B (zh) * | 2010-11-18 | 2013-11-06 | 华为技术有限公司 | 通用公共无线接口业务发送、接收方法及装置 |
EP2602948A1 (en) | 2011-12-05 | 2013-06-12 | Alcatel Lucent | A method of processing a digital signal for transmission, a method of processing an optical data unit upon reception, and a network element for a telecommunications network |
US9866327B2 (en) * | 2012-10-19 | 2018-01-09 | Nippon Telegraph And Telephone Corporation | Distributed radio communication base station system, base band unit, remote radio unit, and method for operating distributed radio communication base station system |
CN104782084B (zh) | 2012-11-14 | 2018-01-02 | 日本电信电话株式会社 | 光用户通信系统、光用户通信方法、上位装置和光用户线路终端装置 |
CN103518356A (zh) * | 2013-03-07 | 2014-01-15 | 华为技术有限公司 | 数据压缩方法、还原方法,装置及系统 |
-
2015
- 2015-12-14 CN CN201580066878.8A patent/CN107005398B/zh active Active
- 2015-12-14 JP JP2016564849A patent/JP6180664B2/ja active Active
- 2015-12-14 WO PCT/JP2015/084977 patent/WO2016098742A1/ja active Application Filing
- 2015-12-14 US US15/516,530 patent/US10069585B1/en active Active
- 2015-12-14 EP EP15869947.0A patent/EP3188400B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5552651A (en) * | 1978-10-12 | 1980-04-17 | Nec Corp | Modulator and demodulator |
JPH01256832A (ja) * | 1988-04-07 | 1989-10-13 | Fujitsu Ltd | 同期多重化制御方式 |
WO2012049815A1 (ja) * | 2010-10-12 | 2012-04-19 | パナソニック株式会社 | 送信回路、受信回路、送信方法、受信方法、通信システム及びその通信方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020519062A (ja) * | 2017-04-11 | 2020-06-25 | フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ | 送信機および受信機並びに対応する方法 |
JP7017585B2 (ja) | 2017-04-11 | 2022-02-08 | フラウンホッファー-ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ | 送信機および受信機並びに対応する方法 |
JP2022064948A (ja) * | 2017-04-11 | 2022-04-26 | フラウンホッファー-ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ | 送信機および受信機並びに対応する方法 |
CN113746587A (zh) * | 2020-05-29 | 2021-12-03 | 深圳市中兴微电子技术有限公司 | 一种时间戳信息传输方法、装置、设备和存储介质 |
Also Published As
Publication number | Publication date |
---|---|
US20180241492A1 (en) | 2018-08-23 |
JP6180664B2 (ja) | 2017-08-16 |
US10069585B1 (en) | 2018-09-04 |
JPWO2016098742A1 (ja) | 2017-04-27 |
EP3188400A4 (en) | 2017-10-04 |
EP3188400B1 (en) | 2020-06-17 |
EP3188400A1 (en) | 2017-07-05 |
CN107005398A (zh) | 2017-08-01 |
CN107005398B (zh) | 2018-12-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6180664B2 (ja) | 送信装置、通信装置および信号伝送システム | |
EP2975858B1 (en) | Method for processing data in the ethernet, physical layer chip and ethernet device | |
JP5071963B2 (ja) | デジタル伝送システム、およびデジタル伝送方法 | |
JP3694848B2 (ja) | 光伝送システム及び光伝送装置 | |
GB2426674A (en) | 64b/66b coding with scrambling of the master transition | |
JP2012525771A (ja) | 連続する同一ディジットの低減のためのシステムおよび方法 | |
US20030172336A1 (en) | Self synchronous scrambler apparatus and method for use in dense wavelength division multiplexing | |
US20030179783A1 (en) | Wavelength division multiplexing transmission system | |
CN109698728B (zh) | Interlaken接口与FlexE IMP的对接方法、对接设备及存储介质 | |
US9438275B2 (en) | Transmission apparatus and transmission method | |
JP2012010014A (ja) | 映像信号を伝送する送信機及び受信機 | |
US9647782B2 (en) | Frame synchronization for data transmission over an optical network | |
EP3082321A1 (en) | Reception device, transmission device, optical transmission device, optical transmission system, and monitoring method | |
JP2011501540A (ja) | シリアルデジタルインターフェースにおける静的データの長いランを防ぐタイミング参照信号のための同期ビット挿入 | |
US20220408055A1 (en) | Transmission device, reception device, and transmission system | |
US20170048023A1 (en) | Apparatus to transmit data using different scramble generator polynomials | |
JP2012134608A (ja) | 光伝送装置 | |
JP5155901B2 (ja) | 送信装置、受信装置及び伝送システム | |
JP5968577B2 (ja) | 通信装置、通信システムおよび誤り訂正フレーム生成方法 | |
JP2012239123A (ja) | 映像データ送信装置及び受信装置 | |
JP2015133555A (ja) | Cpri伝送方式 | |
EP3247058B1 (en) | Transmission circuit, reception circuit, optical transfer system, and method for transmitting multiframes | |
JP5856660B1 (ja) | フレームデータ分割方法 | |
JP6211231B2 (ja) | 光通信装置 | |
JP6553964B2 (ja) | 映像信号送信装置及び映像信号受信装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15869947 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016564849 Country of ref document: JP Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2015869947 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015869947 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15516530 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |