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    • 专利摘要:
    The present invention relates to a section overhead processing apparatus and a method in an optical transmission network in a synchronous transmission mode (hereinafter referred to as "STM"), and particularly, to communicate section overhead without interruption between a transmitting side and a receiving side. An interval overhead processing apparatus and a method for enabling the same are provided. The present invention extracts the bytes that are actually being operated, that is, the operating overhead bytes, within the section overhead of the STM-N signal for each channel input from the transmitting optical transmitters, and uses them within the section overhead of the STM-M signal. Inserting and transmitting the STM-16 operation overhead byte for each extracted channel in an area not being used, and further, the STM-N operation overhead byte for each channel inserted in the section overhead of the received STM-M signal. It extracts and inserts it into the section overhead of STM-16 format for each channel and outputs it to the receiving optical transmission apparatuses so that the transmitting side and the receiving side can communicate the section overhead without interruption in the STM optical transmission network. As a result, there is an advantage to maintain the same operation method of the existing STM-N transmission network. The present invention provides an STM-N demultiplexing means for converting an STM-N (N = 1, 4, 16) signal for each channel input from the outside into STM-N demultiplexing and converting it into a plurality of management unit group signals; STM-M multiplexing means for converting STM-M (M = 4,16,64, N <M) multiplexed to STM-M signal and transmitting it to the optical transmission module STM-M demultiplexing means for performing STM-M demultiplexing on the STM-M signal transmitted from a receiving module and converting the STM-M signal into a management unit group signal for each channel, and STM- for the management unit group signal for each channel An STM-N demultiplexing means in an STM optical transmission network including STM-N multiplexing means for converting an STM-N signal for each channel by N-N multiplexing and outputting the same to an external channel, wherein the STM-N demultiplexing means comprises: It actually operates within the section overhead of each STM-N format Multiplexing means for extracting the overhead bytes and management overhead, multiplexing the extracted each channel operating overhead bytes; And the STM-M multiplexing means inserts the operation overhead bytes for each of the multiplexed channels into an unused region within the section overhead of the STM-M format, and the STM-M demultiplexing means inserts the STM-M. And an overhead demultiplexing means for extracting the operating overhead bytes for each of the multiplexed channels from the interval overhead of a format, and demultiplexing the operating overhead bytes for each channel multiplexed by the overhead multiplexing means. The STM-N multiplexing means inserts the operation overhead bytes for each channel into the section overhead of the STM-N format for each channel.
    公开号:KR20030080105A
    申请号:KR1020020018128
    申请日:2002-04-03
    公开日:2003-10-11
    发明作者:장진환
    申请人:(주)넥스토시스템；
    IPC主号:
    专利说明:

    Section overhead processing apparatus and method thereof in optical transmission network in synchronous transmission mode {APPARATUS AND METHOD FOR PROCESSING SECTION OVERHEAD IN STM OPTIC TRANSFER NETWORK}
    [6] The present invention relates to a section overhead processing apparatus and a method in an optical transmission network in a synchronous transmission mode (hereinafter referred to as "STM"), and in particular, to communicate a section overhead between a transmitter and a receiver without disconnection. An interval overhead processing apparatus and a method for enabling the same are provided.
    [7] In recent years, as the shortage of optical fiber occurs, the introduction of a high speed multiplexing / demultiplexing device for minimizing the number of optical fibers used in network construction has been considered. The problem to be solved for the introduction of the high speed multiplexing / demultiplexing device is, "Can we maintain the existing configuration, management and operation of the optical transmission network " to be.
    [8] Prior to the description, the meanings of (N = 1,4,16), (M = 4,16,64, N <M) are as follows. That is, N may be 1, 4, or 16. When N is 1, M is 4, when N is 4, M is 16, and when N is 16, M is 64. It means.
    [9] 1 shows an example of an installed STM-N optical transmission network.
    [10] As shown in FIG. 1, four STM-N (N = 1, 4, 16) optical transmission networks (1, 2, 3, 4) have six stations 110, 120, 130, 140, 150, 160). Each station is provided with STM-N optical transmitters 101 to 131, and the STM-N optical transmitters transmit / receive STM-N frames with each other by a predetermined network operation scheme. Such network operation information is carried in the relay section of the STM-N frame (hereinafter referred to as "RS") overhead and multiple section (hereinafter referred to as "MS") overhead region. However, in order to minimize the number of optical paths between the bursa 130 and the bursa 140, in the case of installing the STM-M (M = 4, 16, 64, N <M) multiple / demultiplexing device, the transmission STM-N The section overhead communication between the optical transmission device and the receiving STM-N optical transmission device is disconnected, and thus the optical transmission networks 1, 2, 3, and 4 cannot maintain the current network configuration, management and operation methods.
    [11] 2 shows an example in which an STM-M (N <M) multiplex / demultiplexer is installed in an STM-N optical transmission network. Hereinafter, a description will be given with reference to FIG. 1.
    [12] STM-M (M = 4,16,64, N <M) multiple / demultiplexer 200 between STM-N (N = 1,4,16) bureau 130 and STM-N bureau 140 Is installed. The STM-M multiplexer / demultiplexer 200 is largely composed of an STM-N demultiplexer 210, an STM-M multiplexer 220, an STM-M demultiplexer 240, and an STM-N multiplexer 250. .
    [13] The STM-N demultiplexer 210 performs STM-N demultiplexing on the STM-N signals for each channel input from the external STM-N optical transmission apparatuses 109 to 115, respectively, and administrative units for each channel. Group (AUG) signal, which discards the section (RS, MS) overhead (in STM-N format) of the STM-N signal. In addition, the STM-N demultiplexer 210 performs a synchronization function by processing an administrative unit (AU) pointer using a reference clock and a reference frame.
    [14] The STM-M multiplexer 220 performs STM-M multiplexing on the converted AUT signals for each channel, converts the STM-M signals into STM-M signals, and converts the converted STM-M signals into an optical transmission module (not shown). Not sent.). At this time, the STM-M multiplexer 220 inserts the section (RS, MS) overhead of the newly generated STM-M format.
    [15] The optical transmission module converts the generated STM-M signal and transmits it through the transmission path 230, and the optical reception module (not shown) converts the received STM-M signal into optical / pre-conversion. This is transmitted to the STM-M demultiplexer 240.
    [16] The STM-M demultiplexer 240 converts the transferred STM-M signal into a channel-specific management unit group (AUG) signal by performing STM-M demultiplexing, wherein the interval of the inserted STM-M format (RS) , MS) to extract overhead.
    [17] The STM-N multiplexer 250 STM-N multiplexes the converted control unit group (AUG) signal for each channel, converts the STM-N signal for each channel, and converts it to an external STM-N optical transmitter. At 117-123.
    [18] As described above, since the STM-M multiplex / demultiplexer discards the section overhead (STM-N format) of the STM-N signals in the STM optical transmission network, the transmitting-side STM-N transmitters 109 to 115 ) And the STM-N overhead transmission device 117 to 123 are disconnected.
    [19] In order to solve this conventional problem, a method for introducing an STM-M multiplexing / demultiplexing apparatus into a ring-type STM-N network that performs protection switching using overhead communication has been prepared. However, in this case, there is a problem in that the network system needs to be changed, such as releasing the STM-N ring network and changing the STM-N network into a monolithic structure.
    [20] Accordingly, an object of the present invention is to provide an apparatus and a method for allowing a transmitter and a receiver to communicate interval overhead without interruption in an STM optical transmission network.
    [21] In order to achieve the above object, the present invention provides an STM-N demultiplexing process for STM-N (N = 1,4,16) signals for each channel, which are input from the outside, to convert the STM-N into a plurality of management unit group signals. Demultiplexing means and STM-M (M = 4,16,64, N <M) multiplexing on the management unit group signals for each channel, converting them into STM-M signals and transmitting them to the optical transmission module. M multiplexing means, STM-M demultiplexing means for STM-M demultiplexing the STM-M signal transmitted from the optical receiving module and converting the STM-M signal into a management unit group signal for each channel, and the management unit for each channel In the STM-N multiplexing processing apparatus in the STM optical transmission network comprising an STM-N multiplexing process for converting the group signal to the STM-N signal for each channel and outputs it to the outside, the STM-N The demultiplexing means sets the interval in STM-N format for each channel. Actual operation in the head and extracts the management overhead bytes, and overhead multiplexing means for multiplexing the extracted each channel operating overhead bytes; And the STM-M multiplexing means inserts the operation overhead bytes for each of the multiplexed channels into an unused region within the section overhead of the STM-M format, and the STM-M demultiplexing means inserts the STM-M. And an overhead demultiplexing means for extracting the operating overhead bytes for each of the multiplexed channels from the interval overhead of a format, and demultiplexing the operating overhead bytes for each channel multiplexed by the overhead multiplexing means. The STM-N multiplexing means inserts the operation overhead bytes for each channel into the section overhead of the STM-N format for each channel.
    [22] The present invention provides an STM-N demultiplexing means for converting STM-N (N = 1, 4, 16) signals for each channel input from the outside into STM-N demultiplexing and converting them into a plurality of management unit group signals; STM-M multiplexing means for converting STM-M (M = 4,16,64, N <M) multiplexed to the STM-M signal for each channel and transmitting the same to the optical transmission module; STM-M demultiplexing means for performing STM-M demultiplexing on the STM-M signal transmitted from the optical receiving module and converting the STM-M signal into a management unit group signal for each channel, and STM for the management unit group signal for each channel A section overhead processing method in an STM optical transmission network including an STM-N multiplexing means for converting an STM-N signal for each channel by performing N-N multiplexing and outputting the same to an external device, the section of the STM-N format for each channel Operational overhead actually running within the overhead A first step of extracting a byte; A second step of multiplexing the extracted operation overhead bytes for each channel; Inserting an operation overhead byte for each multiplexed channel into an unused region within an interval overhead of an STM-M format; Extracting an operation overhead byte for each multiplexed channel from the interval overhead of the STM-M format; A fifth step of demultiplexing the operation overhead bytes for each channel multiplexed by the overhead multiplexing means; And inserting the operation overhead byte for each channel into the section overhead of the STM-N format for each channel.
    [1] 1 is an example of an installed STM-N optical transmission network.
    [2] 2 is an example of installing an STM-M (N <M) multiplex / demultiplexer in an STM-N optical transmission network.
    [3] 3 is an overhead frame structure of an STM-16 signal.
    [4] 4 is an overhead frame structure of an STM-64 signal.
    [5] 5 is a diagram illustrating a configuration of an interval overhead processing apparatus according to the present invention in an STM optical transmission network.
    [23] The STM-M multiplexing / demultiplexing apparatus of the present invention overcomes the overhead communication between the STM-N transmission apparatuses, thereby maintaining the same configuration, management and operation of the existing STM-N transmission network.
    [24] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    [25] 3 shows an overhead frame structure of the STM-16 signal, and FIG. 4 shows an overhead frame structure of the STM-64 signal.
    [26] The overhead size of the STM-16 signal is 9 * 144 bytes. However, the overhead byte related to the operation of the actual transmission network is about 19 bytes, and no other "x" display area is defined. And, of the STM-64 signal overhead, the total sum of the undefined " x " regions other than the region related to the operation of the STM-64 transmission network is 4007 bytes. In the present invention, the operation overhead byte means a byte having information related to actual transmission network operation defined within the section overhead of the STM signal.
    [27] An interval overhead processing apparatus of an STM optical transmission network according to an embodiment of the present invention is actually operated within a section overhead of an STM-16 signal for each channel input from transmitting optical transmission apparatuses, that is, an operation overhead byte ( 4 * 19 bytes). The interval overhead processing apparatus inserts the extracted STM-16 operation overhead bytes for each channel into an unused area (marked " x " region: 4077 bytes) within the interval overhead of the STM-64 signal. Send.
    [28] In addition, the section overhead processing apparatus extracts the channel-specific STM-16 operation overhead bytes inserted in the section overhead of the received STM-64 signal, and inserts the same into the section overhead of the channel-specific STM-16 signal. Output to receiving optical transmitters.
    [29] FIG. 5 is a diagram illustrating a configuration of an interval overhead processing apparatus according to the present invention in an STM optical transmission network.
    [30] In the following description, the case where N is 16 and M is 64 will be described as an example.
    [31] The STM-16 demultiplexer 510 performs STM-16 demultiplexing on each channel of the STM-16 signal inputted from the external STM-16 optical transmission apparatuses 109 to 115, respectively, and manages each unit by the management unit group (AUG). Convert to a signal. The management unit group signal may be 128 77.76 Mb / s signals. Since the STM-16 demultiplexing operation of the STM-16 demultiplexer 510 is well known, a detailed description thereof will be omitted. During the STM-16 demultiplexing operation, the STM-16 demultiplexer 510 terminates the section (RS, MS) overhead (STM-16 format) of the STM-16 signal for each channel. In this case, the STM-16 demultiplexer 510 has a function of extracting a byte (operation overhead byte) that is actually being operated within the section (RS, MS) overhead of the STM-16 format for each channel.
    [32] The overhead multiplexing processor 520 multiplexes the STM-16 operation overhead bytes extracted for each channel. The overhead multiplexing processor 520 may multiplex the operational overhead bytes in a time division manner.
    [33] The STM-64 multiplexer 530 performs an STM-64 multiplexing process on the AUG signals for each channel, converts them into STM-64 signals, and transfers the STM-64 signals to the optical transmission module 521. Since the STM-64 multiplexing operation is a known technique, detailed description thereof will be omitted.
    [34] In the STM-64 multiplexing operation, a newly generated STM-64 format section overhead is inserted, and the STM-64 multiplexer 530 is located in an area not used within the STM-64 section overhead. And inserting an operation overhead byte of the STM-16 multiplexed by the overhead multiplexing processor 520.
    [35] The optical transmission module 521 converts the STM-64 signals input from the STM-64 multiplexer 530 and transmits them through the transmission path 522, and the optical reception module 523 receives the received STM-64 signals. It converts the 64 signals photoelectrically and forwards them to the STM-64 demultiplexer 540.
    [36] The STM-64 demultiplexer 540 performs an STM-64 demultiplexing process on the STM-64 signal input from the STM-64 optical reception module 523 and converts the STM-64 demultiplexer into an AUG signal for each channel. The management unit group (AUG) signal may be 128 77.76 Mb / s signals. Since the STM-64 demultiplexing operation of the STM-64 demultiplexer 540 is a well-known technique, a detailed description thereof will be omitted.
    [37] In the STM-64 demultiplexing process, the STM-64 demultiplexer 540 processes the section (RS, MS) overhead of the input STM-64 signal to perform synchronization byte detection, error checking, and the like. A step of extracting a section-64 format section overhead from the STM-64 signal is performed. In this case, the STM-64 demultiplexer 540 performs the multiplexing on the section (RS, MS) overhead of the STM-64 format. Extract the operational overhead bytes.
    [38] The overhead demultiplexing processor 550 demultiplexes the operational overhead bytes multiplexed by the overhead multiplexer 520 and extracted from the overhead of the STM-64 format. The overhead demultiplexing processor 550 may perform the demultiplexing operation in a time division manner.
    [39] The STM-16 multiplexer 560 converts an STM-16 multiplexed signal to each channel by STM-16 multiplexing the converted AUT signal for each channel, and converts the STM-16 signal for each channel into an external STM-16 optical transmission device ( 117 to 123).
    [40] Since the STM-16 multiplexing operation is a known technique, detailed description thereof will be omitted. In the STM-16 multiplexing operation, the STM-16 multiplexer 560 has a function of inserting the operation overhead byte into the section (RS, MS) overhead of the STM-16 format for each channel.
    [41] As described above, the present invention extracts the actual operating byte, that is, the operating overhead byte, within the section overhead of the STM-N signal for each channel input from the transmitting optical transmission apparatuses, and the section of the STM-M signal. The STM-16 operating overhead byte for each extracted channel is inserted and transmitted in an area not used within the overhead, and the STM-specific for channel inserted in the section overhead of the received STM-M signal. The N operating overhead bytes are extracted, inserted into the channel overhead of the STM-16 format for each channel, and output to the receiver optical transmitters, so that the transmitter and receiver can communicate the interval overhead without interruption in the STM optical transmission network. To help. As a result, there is an advantage to maintain the same operation method of the existing STM-N transmission network.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] STM-N demultiplexing means for converting the STM-N (N = 1, 4, 16) signal for each channel input from the outside into STM-N demultiplexing and converting the signals into a plurality of management unit group signals; STM-M multiplexing process for STM-M (M = 4,16,64, N <M) multiplexing on the control unit group signal and converting it into STM-M signal and transmitting it to the optical transmission module, and from the optical reception module STM-M demultiplexing means for converting STM-M demultiplexing to the STM-M signal to be transmitted to the management unit group signal for each channel, and STM-N multiplexing processing for the management unit group signal for each channel In the STM-N signal transmission section in the STM optical transmission network comprising a STM-N multiplexing means for converting the STM-N signal for each channel and outputting it to the outside,
    The STM-N demultiplexing means extracts an operation overhead byte actually being operated within the section overhead of the STM-N format for each channel,
    Overhead multiplexing means for multiplexing the extracted operational overhead bytes for each channel; And
    The STM-M multiplexing means inserts the operation overhead bytes for each of the multiplexed channels into an unused region within the section overhead of the STM-M format,
    The STM-M demultiplexing means extracts the operation overhead bytes for each of the multiplexed channels from the interval overhead of the STM-M format,
    An overhead demultiplexing means for demultiplexing the operation overhead bytes for each channel multiplexed by the overhead multiplexing means,
    And the STM-N multiplexing means inserts the operation overhead bytes for each channel into the section overhead of the STM-N format for each channel.
    [2" claim-type="Currently amended] STM-N demultiplexing means for converting the STM-N (N = 1, 4, 16) signal for each channel input from the outside into STM-N demultiplexing and converting the signals into a plurality of management unit group signals; STM-M multiplexing process for STM-M (M = 4,16,64, N <M) multiplexing on the control unit group signal and converting it into STM-M signal and transmitting it to the optical transmission module, and from the optical reception module STM-M demultiplexing means for converting STM-M demultiplexing to the STM-M signal to be transmitted to the management unit group signal for each channel, and STM-N multiplexing processing for the management unit group signal for each channel In the STM-N signal transmission method comprising a STM-N multiplexing means for converting the STM-N signal for each channel and outputting it to the outside,
    A first step of extracting an operating overhead byte actually operating within the section overhead of the STM-N format for each channel;
    A second step of multiplexing the extracted operation overhead bytes for each channel;
    Inserting an operation overhead byte for each multiplexed channel into an unused region within an interval overhead of an STM-M format;
    Extracting an operation overhead byte for each multiplexed channel from the interval overhead of the STM-M format;
    A fifth step of demultiplexing the operation overhead bytes for each channel multiplexed by the overhead multiplexing means; And
    And a sixth step of inserting the operation overhead byte for each channel into the section overhead of the STM-N format for each channel.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2002-04-03|Application filed by (주)넥스토시스템
    2002-04-03|Priority to KR1020020018128A
    2003-10-11|Publication of KR20030080105A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020020018128A|KR20030080105A|2002-04-03|2002-04-03|Apparatus and method for processing section overhead in stm optic transfer network|
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