CN107210974B - Method, device and system for configuring operation management maintenance overhead - Google Patents
Method, device and system for configuring operation management maintenance overhead Download PDFInfo
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Abstract
The embodiment of the invention discloses a method for configuring OAM overhead of operation, administration and maintenance, which comprises the following steps: at a sending end, receiving service data from a client side, mapping the service data into a first subcarrier signal, and mapping OAM overhead corresponding to the service data into a second subcarrier signal; multiplexing the first subcarrier signal and the second subcarrier signal into the same sub-band signal in a frequency division multiplexing mode, and sending the sub-band signal out from a network side. By the technical scheme, the service data and the OAM overhead are mapped to different subcarrier signals, when the relay equipment needs to modify the OAM overhead of the multiplexing section, the service data does not need to be subjected to photoelectric conversion, and the processing complexity and cost are reduced.
Description
Technical Field
The present invention relates to the field of optical communications, and in particular, to a method, an apparatus, and a system for configuring an operation management maintenance overhead.
Background
In a Transmission Network, for example, in an SDH (Synchronous Digital Hierarchy) or OTN (Optical Transmission Network) Network architecture, multiplexing is generally performed by using an electrical multiplexing method. In the process of electrical multiplexing, OAM (Operation Administration and Maintenance) overhead information and service data are multiplexed into the same particle container. By particle container is meant a transport unit having a certain transport rate. Service data and overhead information with different grain sizes are multiplexed from a low-order container to a high-order container and finally transmitted through optical wavelength. The optical wavelength is only used as a transmission tool, and network management and maintenance processing are not carried out.
In the SDH optical network, the particle container is a synchronous transmission module, including STM-1, STM-4, etc. 5% of synchronous transmission modules STM-1, STM-4 and the like are set in the code stream of the time domain as overhead bytes for managing and maintaining the network. The overhead byte comprises a multiplexing section overhead and a channel section overhead, and the service data code stream and the corresponding overhead information code stream are mapped into the same synchronous transmission module in a time division multiplexing mode.
In the prior art, OAM overhead information and service data are mapped into the same particle container in a time division multiplexing manner, and the OAM overhead information occupies a part of time domain overhead. If the OAM overhead information is modified, all information in the particle container needs to be read out, and overhead information in the time domain is obtained. Correspondingly, in the optical transmission network, overhead information and service data are mapped to the same optical wavelength, and if the overhead information in the optical wavelength signal is to be identified and modified, all the service data and the overhead information need to be subjected to photoelectric conversion, and then all the particle containers are read in the electrical domain to obtain the overhead information in the time domain. Therefore, when overhead information is processed, the service data is also photoelectrically converted, which increases additional cost and processing complexity.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, and a system for operation, management, and maintenance overhead configuration, which can solve the problem that when overhead information is processed, photoelectric conversion is performed on service data, so that additional cost and processing complexity are increased.
In a first aspect, an embodiment of the present invention provides a method for configuring an operation, administration and maintenance OAM overhead, including: receiving service data from a client side, mapping the service data into a first subcarrier signal, and mapping OAM overhead corresponding to the service data into a second subcarrier signal; multiplexing the first subcarrier signal and the second subcarrier signal into the same sub-band signal in a frequency division multiplexing mode, and sending the sub-band signal out from a network side.
With reference to the implementation manner of the first aspect, in a first possible implementation manner of the first aspect, the mapping the OAM overhead corresponding to the service data to the second subcarrier signal specifically includes: the OAM overhead comprises a multiplexing section OAM overhead and a channel section OAM overhead, and the second subcarrier signal comprises two subcarrier signals; and mapping the multiplexing section OAM overhead to one of the two subcarrier signals, and mapping the channel section OAM overhead to the other of the two subcarrier signals.
With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, before the sending the sub-band signal from the network side, the method further includes: generating a waveband signal by the sub-waveband signal in a frequency division multiplexing mode; the sending the sub-band signal from the network side specifically includes: and sending the wave band signal out from a network side.
In a second aspect, an embodiment of the present invention provides a method for configuring an operation, administration and maintenance OAM overhead, including: receiving a sub-band signal from a network side, wherein the sub-band signal comprises a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data; and demultiplexing the sub-band signal to obtain the first sub-carrier signal, and sending the first sub-carrier signal from a client side.
With reference to the implementation manner of the second aspect, in a first possible implementation manner of the second aspect, when the second subcarrier signal needs to be modified, the method further includes: acquiring a second subcarrier signal to be modified from the wavelet band signal, and generating a new second subcarrier signal after performing photoelectric conversion on the second subcarrier signal to be modified; multiplexing the new second subcarrier signal and the first subcarrier signal into the same new wavelet band signal in a frequency division multiplexing mode, and sending the new wavelet band signal out from the network side.
With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the OAM overhead includes a multiplexing section OAM overhead and a channel section OAM overhead, the second subcarrier signal includes two subcarrier signals, one of the two subcarrier signals maps the multiplexing section OAM overhead, and the other of the two subcarrier signals maps the channel section OAM overhead.
With reference to the second aspect, or any one of the first to the second possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the second subcarrier signal to be modified is a subcarrier signal to which the multiplexing section OAM overhead is mapped.
With reference to the second aspect or any one of the first to the third possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, after the demultiplexing the sub-band signal, the method further includes: obtaining a subcarrier signal mapped with the channel section OAM overhead; and sending the subcarrier signal mapped with the channel section OAM overhead from a client side.
In a third aspect, an embodiment of the present invention provides an apparatus for configuring an operation, administration and maintenance OAM overhead, including: the receiving module is used for receiving a sub-band signal from a network side, wherein the sub-band signal comprises a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data; the demultiplexing module is used for demultiplexing the sub-band signal to obtain the first sub-carrier signal; and the sending module is used for sending the first subcarrier signal out from the client side.
With reference to the implementation manner of the third aspect, in a first possible implementation manner of the third aspect, the OAM overhead includes a multiplexing section OAM overhead and a channel section OAM overhead, and the second subcarrier signal includes two subcarrier signals; the mapping module is specifically configured to: and mapping the multiplexing section OAM overhead to one of the two subcarrier signals, and mapping the channel section OAM overhead to the other of the two subcarrier signals.
With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the multiplexing module is further configured to: generating a waveband signal by the sub-waveband signal in a frequency division multiplexing mode; and the sending module is used for sending the waveband signal out from a network side.
In a fourth aspect, an embodiment of the present invention provides an apparatus for configuring an operation, administration and maintenance OAM overhead, including: the receiving module is used for receiving a sub-band signal from a network side, wherein the sub-band signal comprises a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data; the demultiplexing module is used for demultiplexing the sub-band signal to obtain the first sub-carrier signal; and the sending module is used for sending the first subcarrier signal out from the client side.
With reference to the implementation manner of the fourth aspect, in a first possible implementation manner of the fourth aspect, the apparatus further includes: the modification module is used for acquiring a second subcarrier signal to be modified from the wavelet band signal when the second subcarrier signal needs to be modified, and generating a new second subcarrier signal after performing photoelectric conversion on the second subcarrier signal to be modified; the multiplexing module is used for multiplexing the new second subcarrier signal and the first subcarrier signal into the same new subcarrier signal in a frequency division multiplexing mode; and the sending module is used for sending the new sub-band signal out from the network side.
With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the OAM overhead includes a multiplexing section OAM overhead and a channel section OAM overhead, the second subcarrier signal includes two subcarrier signals, one of the two subcarrier signals maps the multiplexing section OAM overhead, and the other of the two subcarrier signals maps the channel section OAM overhead.
With reference to the fourth aspect, or any one of the first to the second possible implementation manners of the fourth aspect, in a third possible implementation manner of the fourth aspect, the second subcarrier signal that needs to be modified is a subcarrier signal to which the multiplexing section OAM overhead is mapped.
With reference to the fourth aspect or any one of the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the demultiplexing module is further configured to: obtaining a subcarrier signal mapped with the channel section OAM overhead; and the sending module is used for sending the subcarrier signal mapped with the channel section OAM overhead from a client side.
In a fifth aspect, an embodiment of the present invention provides a system for configuring an operation, administration and maintenance OAM overhead, including: an apparatus as described in any one of the third aspect and any one of the fourth aspect.
According to the technical scheme provided by the embodiment of the invention, at a sending end, the business data from a client side is received, the business data is mapped into a first sub-carrier signal, the OAM expense corresponding to the business data is mapped into a second sub-carrier signal, the first sub-carrier signal and the second sub-carrier signal are mapped into the same sub-carrier signal in a frequency division multiplexing mode, and the sub-carrier signal is sent out from a network side. By the technical scheme provided by the embodiment of the invention, the service data and the OAM overhead are mapped to different subcarrier signals, and when the relay equipment needs to modify the OAM overhead of the multiplexing section, the service data does not need to be subjected to photoelectric conversion, so that the processing complexity and the cost are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the background art and the embodiments will be briefly described below. It is to be understood that only some of the embodiments of the present invention are illustrated in the accompanying drawings and that other drawings or embodiments will be derived therefrom by those skilled in the art without the use of inventive faculty, and that the invention is intended to cover all such derivative drawings or embodiments.
Fig. 1 is a schematic structural diagram of an optical add/drop multiplexer according to an embodiment of the present invention;
fig. 2 is an exemplary flowchart of a method for OAM overhead configuration according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a method for generating an OAM overhead of a multiplexing section according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a way for generating an OAM overhead of a channel segment according to an embodiment of the present invention;
fig. 5 is an exemplary flow diagram of an aspect of OAM overhead configuration provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a subband signal feedthrough provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram of the up-wave and down-wave of a sub-band signal according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a modification of the OAM overhead of a multiplex section in a subband signal according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a manner of separating the OAM overhead of the multiplexing section according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an OAM overhead configuration apparatus provided in an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an OAM overhead configuration apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an OADM (Optical Add-Drop Multiplexer) device 100 according to an embodiment of the present invention. As shown in fig. 1, OADM device 100 includes unit modules such as subcarrier multiplexing module 101, subcarrier demultiplexing module 102, sub-band transmitting module 103, sub-band receiving module 104, first tunable filter 105, second tunable filter 106, and OAM overhead module 107. The subcarrier multiplexing module 101 and the subcarrier demultiplexing module 102 may process the electrical signal and may also process the optical signal, and the processing of the electrical signal is taken as an example in the embodiment of the present invention.
In a specific implementation process, the OADM device 100 performs dense wavelength division multiplexing on the service data, that is, the service data is mapped into a plurality of subcarrier signals, and the plurality of subcarrier signals are multiplexed into one sub-band signal in a frequency division multiplexing manner. In the optical fiber channel, service data is carried in the sub-band signal for transmission. Specifically, in the process from the client side to the network side, service data with different grain sizes, such as GE (gigabit Ethernet) service and 10GE service, are mapped to a plurality of subcarrier signals in the subcarrier multiplexing module 101 in a frequency division multiplexing manner, so as to form a subcarrier baseband signal. The sub-band transmitting module 103 performs electro-optical modulation on the sub-carrier baseband signal generated by the sub-carrier multiplexing module, multiplexes the sub-carrier baseband signal into a sub-band signal in a frequency division multiplexing manner, and performs upwarping on the multiplexed sub-band signal. The upper sub-band signal passes through the first tunable filter 105 and is multiplexed with other sub-band signals in the optical fiber channel. In the process from the network side to the client side, the sub-band signals in the optical fiber channel are down-converted after passing through the second tunable filter 106, and the down-converted sub-band signals may be one or more of the sub-band signals. The sub-band signals that are not downbanded can be passed directly to the network-side outlet. After the sub-band receiving module 104 receives the sub-band signal of the lower wave, the received sub-band signal is demodulated to obtain a sub-carrier baseband signal. The subcarrier baseband signal is demultiplexed through the subcarrier demultiplexing module 102 to obtain a plurality of subcarrier signals corresponding to the service data, and the subcarrier signals are output from the client side.
In the process of transmitting service data, OAM overhead needs to be configured to manage and maintain the transmission channel. For example, the configured OAM overhead information is used for optical power monitoring, fault detection and alarm, error code monitoring, connection failure alarm, etc. The OAM overhead includes a multiplexing section OAM overhead and a channel section OAM overhead. Generally, the multiplexing section OAM overhead is configured with nodes in the light source modulation, and the channel section OAM overhead is generated with paths in the light modulation. The multiplexing section OAM overhead changes during the transmission process, so that the modification process can be performed. The OAM overhead of the channel section is transmitted as end-to-end information, and modification processing is not needed in the transmission process. Each subcarrier can carry a management overhead to monitor the transmission performance of the service channel; each sub-band may carry a management overhead to monitor the channel capacity of the optical multiplexing section and establish links for end-to-end optical connections for services. In the OADM device 100 in the embodiment of the present invention, the OAM overhead module 107 may be configured to generate OAM overhead information, identify OAM overhead information, modify OAM overhead information, and the like. For example, the specific implementation process for generating OAM overhead information is as follows: in the process of generating the sub-band signal by frequency division multiplexing of the sub-carrier signal, the OAM overhead is mapped into the independent sub-carrier signal by the OAM overhead module 107. The subcarrier signal corresponding to the OAM overhead generated by the OAM overhead module 107 may be mapped into the same subband signal through the subband sending module 103 and the subcarrier signal corresponding to the service data. Specifically, the multiplexing section OAM overhead and the channel section OAM overhead may be mapped into different, independent subcarrier signals. The specific implementation process for identifying and modifying the OAM overhead information is as follows: in the process that the sub-band signal passes through from the second tunable filter 106 to the first tunable filter 105, if the modification processing needs to be performed on the OAM overhead of the multiplexing section in the sub-band signal, the sub-carrier signal corresponding to the OAM overhead of the multiplexing section can be separated from the sub-band signal through the second tunable filter 106. And performing photoelectric conversion on the subcarrier signals corresponding to the multiplexing section OAM overhead, and modifying. And performing photoelectric conversion on the modified OAM overhead of the multiplexing section to form a new subcarrier signal, and multiplexing the new subcarrier signal into the original subcarrier signal corresponding to the OAM overhead of the multiplexing section. In the embodiment of the invention, when the relay equipment needs to modify the OAM overhead of the multiplexing section, only the OAM overhead of the multiplexing section can be subjected to photoelectric conversion, and the service data and the OAM overhead of the channel section do not need to be subjected to photoelectric conversion, so that the processing complexity is reduced.
Fig. 2 is an exemplary flowchart of a method for OAM overhead configuration according to an embodiment of the present invention. As shown in fig. 2, OAM overhead configuration may be performed on an optical transmission device, such as the OADM device shown in fig. 1. Specifically, the OADM device may be a transmitting device in the network, and may also be a receiving device or a relay device. The specific implementation process comprises the following steps:
s201: receiving service data from a client side, mapping the service data into a first subcarrier signal, and mapping OAM overhead corresponding to the service data into a second subcarrier signal.
Specifically, the service data of the client side may be GE, 10GE, and the like. The traffic data of the client side may be mapped into a plurality of subcarrier signals and thus may include a plurality of first subcarrier signals. The OAM overhead may include a multiplex section OAM overhead and a channel section OAM overhead, where the multiplex section OAM overhead and the channel section OAM overhead are mapped into different, independent subcarrier signals. Thus, the second subcarrier signal may include two different, independent subcarrier signals, which are the multiplex section OAM overhead subcarrier signal and the channel section OAM overhead subcarrier signal, respectively.
Specifically, the manner in which the multiplex section OAM overhead is generated is as shown in fig. 3. The laser light source can be divided into two parts, wherein one part generates a first subcarrier signal corresponding to service data, and the other part generates a multiplexing section OAM overhead subcarrier signal. The first subcarrier signal may be a dense subcarrier signal having a frequency, such as 25 Ghz. The first subcarrier signal and the multiplexing section OAM overhead subcarrier signal are loaded through different modulators. Specifically, the service data is loaded in a first light source of the laser through a first modulator to form a first subcarrier signal. And the multiplexing section OAM overhead is loaded in a second light source of the laser through a second modulator to form a multiplexing section OAM overhead subcarrier signal. The first subcarrier signal and the multiplexing section OAM overhead subcarrier signal can be multiplexed by frequency division multiplexing and the like to form a subband signal. Alternatively, the traffic data may be loaded into different subcarrier signals through the first modulator together with the channel segment OAM overhead.
The way the channel segment OAM overhead is generated is shown in fig. 4. The channel segment OAM overhead may include service synchronization characters, service information and management overhead, error detection information, FEC information, and the like. Specifically, a serial bit stream of service data generates a synchronization header of the channel section OAM overhead through a bit first-in first-out module as a service synchronization character. And inserting the service information and the management overhead preset by the equipment system into the service synchronization character. Inserting service data, service information and management overhead into the OAM overhead of the channel segment through Bit Interleaved Parity (BIP) calculation to generate error code detection information and Forward Error Correction (FEC) information. The service data and the OAM overhead of the channel section are mapped into different and independent sub-carrier signals and are multiplexed into one sub-band signal in a frequency division multiplexing mode.
S202: multiplexing the first subcarrier signal and the second subcarrier signal into the same sub-band signal in a frequency division multiplexing mode, and sending the sub-band signal out from a network side.
Specifically, the first subcarrier signal and the second subcarrier signal may be different subcarrier signals, and are mapped to the same subcarrier signal in a frequency division multiplexing manner. In a specific implementation process, the plurality of subcarrier signals generate the sub-band signals in a frequency division multiplexing mode, and the plurality of sub-band signals generate the sub-band signals in the frequency division multiplexing mode. The band signals have a frequency interval of a WDM (Wavelength-division Multiplexing) system. Each wave band signal is composed of a plurality of sub-wave band signals, and the sub-wave band signals carry data signals with finer grains; each sub-band signal is composed of a plurality of sub-carrier signals, and the sub-carrier signals carry more granular and more detailed data signals.
In this embodiment, at a sending end, service data from a client side is received, the service data is mapped into a first subcarrier signal, an OAM overhead corresponding to the service data is mapped into a second subcarrier signal, the first subcarrier signal and the second subcarrier signal are mapped into the same wavelet band signal in a frequency division multiplexing manner, and the wavelet band signal is sent out from a network side. By mapping the service data and the OAM overhead to different subcarriers, when the relay equipment needs to modify the OAM overhead of the multiplexing section, the photoelectric conversion of the service data is not needed, and the processing complexity and cost are reduced.
Fig. 5 is an exemplary flowchart of a method for OAM overhead configuration according to an embodiment of the present invention. As shown in fig. 5, OAM overhead configuration may be performed on an optical transmission device, such as the OADM device shown in fig. 1. The specific implementation process comprises the following steps:
s501: receiving a sub-band signal from a network side, wherein the sub-band signal comprises a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data.
In particular, a plurality of sub-band signals may be received, each of which may include a plurality of first sub-carrier signals and a plurality of second sub-carrier signals. The sub-band signals carry service data and OAM overhead information corresponding to the service data respectively through independent sub-carrier signals. For example, the first subcarrier signal carries service data, and the second subcarrier signal carries OAM overhead information corresponding to the service data. The OAM overhead information includes multiplexing section OAM overhead and channel section OAM overhead, which are carried by different second subcarrier signals respectively. For example, the OAM overhead may be carried by two independent subcarrier signals, where the multiplexing section OAM overhead is carried by a multiplexing section OAM overhead subcarrier signal, and the channel section OAM overhead is carried by a channel section OAM overhead subcarrier signal. As shown in fig. 6, three sub-band signals are shown, each of which includes four sub-carrier signals, but the number of sub-band signals and sub-carrier signals is not limited thereto. Wherein, a1, a2, a3 are subcarrier signals corresponding to channel section OAM overhead, d1, d2, d3 are subcarrier signals corresponding to multiplexing section OAM overhead, and the rest are subcarrier signals corresponding to service data. The multiplexing section OAM overhead may be modified during the transmission process. The channel section OAM overhead is transmitted as end-to-end information, and modification is not needed in the transmission process. When d1, d2 and d3 do not need to be modified, all subcarrier signals are passed through between the first tunable filter and the second tunable filter and are directly transmitted from the network side. When d1, d2, d3 require modification, reference may be made to the implementation steps of the embodiment shown in fig. 8.
S502: and demultiplexing the sub-band signal to obtain the first sub-carrier signal, and sending the first sub-carrier signal from a client side.
Specifically, the sub-band signal received from the network side may also be down-converted on any one OADM device. Optionally, the new sub-band signal may be up-converted by any OADM device. The purpose of the down-wave is to transmit service data carried by the sub-band signal to a client device, and the purpose of the up-wave is to transmit service data generated by the client device into a network through the sub-band signal for transmission. The particle containers of the upper wave and the lower wave may use a waveband signal or a sub-waveband signal as a unit, and only the sub-waveband signal is taken as an example in the embodiment of the present invention for explanation. As shown in fig. 7, the sub-band signal a2b2c2d2 needs to be downed. Specifically, the sub-band signal of the lower wave may be demultiplexed, and the first sub-carrier signal carrying the service data may be sent to the client device, or the second sub-carrier signal included in the sub-band signal may also be sent to the client device. Optionally, before the wave is dropped, the subcarrier signal d2 corresponding to the multiplexing section OAM overhead may be separated in a manner as shown in fig. 9, and the first subcarrier signal corresponding to the service data and the subcarrier signal corresponding to the channel section OAM overhead are sent to the client device. The upwarping process may respectively map the multiplexing section OAM overhead, the channel section OAM overhead, and the service data into different subcarrier signals in the manners shown in fig. 3 and fig. 4, and multiplex into the same sub-band signal. The subcarrier signal corresponding to the uplink service data may be the same as or different from the subcarrier signal corresponding to the downlink service data.
Optionally, the multiplexing section OAM overhead in the OAM overhead needs to be modified during transmission. In particular, overhead modifications may be made on the OADM relay device. As shown in fig. 8, in the OADM relay device, the subcarrier signals (d1, d2, d3) corresponding to the multiplexed section OAM overhead are separated from the sub-band signal by the first tunable filter. For example, d1 is separated from the sub-band signal a1b1c1d1, d2 is separated from the sub-band signal a2b2c2d2, and d3 is separated from the sub-band signal a3b3c3d 3. And performing photoelectric conversion on the subcarrier signals corresponding to the multiplexing section OAM overhead, and then performing overhead modification. And performing electro-optical conversion on the modified subcarrier signals, and multiplexing the modified subcarrier signals (D1, D2 and D3) with a first subcarrier signal corresponding to service data, a subcarrier signal corresponding to channel section OAM overhead and the like through a second tunable filter. For example, D1 and a1, b1 and c1 are multiplexed into the same sub-band signal, D2 and a2, b2 and c2 are multiplexed into the same sub-band signal, and D3 and a3, b3 and c3 are multiplexed into the same sub-band signal. And the subcarriers D1, D2 and D3 corresponding to the multiplexing section OAM overhead are changed into D1, D2 and D3 after being modified, and are multiplexed with the subcarrier signals corresponding to the original service data and the subcarrier signals corresponding to the channel section OAM overhead again to form a new wavelet band signal.
The multiplexing section OAM overhead may be separated before it is modified. Specifically, a specific implementation process for separating the subcarrier signal corresponding to the OAM overhead of the multiplexing section from the sub-band signal is shown in fig. 9. The sub-band signal may include a first sub-carrier signal corresponding to the service data, a sub-carrier signal corresponding to the channel section OAM overhead, and a sub-carrier signal corresponding to the multiplexing section OAM overhead. The sub-band signals are separated by passive filtering, e.g. by tunable filters. The subcarrier signals corresponding to the channel section OAM overhead and the first subcarrier signals are separated together, and the subcarrier signals corresponding to the multiplexing section OAM overhead are separated separately. And performing photoelectric detection on the subcarrier signal corresponding to the multiplexing section OAM overhead and identifying corresponding information so as to separate the multiplexing section OAM overhead information from the wavelet signal.
In this embodiment, at a receiving end, a sub-band signal from a network side is received, where the sub-band signal includes a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data; and demultiplexing the sub-band signal to obtain a first sub-carrier signal, and sending the first sub-carrier signal from the client side. The first subcarrier and the second subcarrier are respectively mapped with the service data and the OAM overhead, when the OAM overhead of the multiplexing section needs to be modified by the relay equipment, the service data does not need to be subjected to photoelectric conversion, and the processing complexity and cost are reduced.
Fig. 10 is a schematic structural diagram of an OAM overhead configuration apparatus according to an embodiment of the present invention. In particular, the apparatus may be an optical transmission device, such as an OADM device. The apparatus shown in fig. 10 and the apparatus shown in fig. 11 may be provided in the same optical transmission device, or may be provided in different optical transmission devices. The device includes: a receiving module 1001, a mapping module 1002, a multiplexing module 1003 and a transmitting module 1004. The apparatus shown in fig. 10 may perform the method steps of OAM overhead configuration in the embodiment of fig. 2.
The receiving module 1001 is configured to receive service data from a client side.
A mapping module 1002, configured to map the service data into a first subcarrier signal, and map an OAM overhead corresponding to the service data into a second subcarrier signal. Specifically, the mapping module 1002 is specifically configured to: and mapping the multiplexing section OAM overhead to one of the two subcarrier signals, and mapping the channel section OAM overhead to the other of the two subcarrier signals.
A multiplexing module 1003, configured to multiplex the first subcarrier signal and the second subcarrier signal into the same subband signal in a frequency division multiplexing manner.
A sending module 1004, configured to send the sub-band signal from the network side.
Wherein, the multiplexing module 1003 is further configured to: generating a waveband signal by the sub-waveband signal in a frequency division multiplexing mode; a sending module 1004, configured to send the waveband signal from the network side.
In this embodiment, the receiving module receives service data from a client, the mapping module maps the service data into a first subcarrier signal, maps an OAM overhead corresponding to the service data into a second subcarrier signal, the multiplexing module maps the first subcarrier signal and the second subcarrier signal into the same wavelet signal in a frequency division multiplexing manner, and the sending module sends the wavelet signal out from a network side. By mapping the service data and the OAM overhead to different subcarriers, when the relay equipment needs to modify the OAM overhead of the multiplexing section, the photoelectric conversion of the service data is not needed, and the processing complexity and cost are reduced.
Fig. 11 is a schematic structural diagram of an OAM overhead configuration apparatus according to an embodiment of the present invention. In particular, the apparatus may be an optical transmission device, such as an OADM device. The apparatus shown in fig. 11 and the apparatus shown in fig. 10 may be provided in the same optical transmission device, or may be provided in different optical transmission devices. The device includes: a receiving module 1101, a demultiplexing module 1102 and a sending module 1103. The apparatus shown in fig. 11 may perform the method steps of OAM overhead configuration in the embodiment of fig. 5.
The receiving module 1101 is configured to receive a sub-band signal from a network side, where the sub-band signal includes a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data. Specifically, the OAM overhead includes a multiplexing section OAM overhead and a channel section OAM overhead, the second subcarrier signal includes two subcarrier signals, one of the two subcarrier signals maps the multiplexing section OAM overhead, and the other of the two subcarrier signals maps the channel section OAM overhead.
A demultiplexing module 1102, configured to demultiplex the sub-carrier signal to obtain the first sub-carrier signal.
A sending module 1103, configured to send the first subcarrier signal from the client side. Optionally, the demultiplexing module 1102 is further configured to: obtaining a subcarrier signal mapped with the channel section OAM overhead; a sending module 1103, configured to send the subcarrier signal mapped with the channel segment OAM overhead from a client side.
Specifically, the device further comprises a modification module and a multiplexing module. The modification module is used for acquiring a second subcarrier signal to be modified from the subcarrier signal when the second subcarrier signal needs to be modified, and generating a new second subcarrier signal after performing photoelectric conversion on the second subcarrier signal to be modified; the multiplexing module is used for multiplexing the new second subcarrier signal and the first subcarrier signal into the same new subcarrier signal in a frequency division multiplexing mode; a sending module 1103, configured to send the new sub-band signal from the network side. The second subcarrier signal to be modified may be a subcarrier signal to which the multiplexing section OAM overhead is mapped.
In this embodiment, a receiving module receives a sub-band signal from a network side, where the sub-band signal includes a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data; the demultiplexing module demultiplexes the sub-band signal to obtain a first sub-carrier signal, and the sending module sends the first sub-carrier signal out from the client side. The first subcarrier and the second subcarrier are respectively mapped with the service data and the OAM overhead, when the OAM overhead of the multiplexing section needs to be modified by the relay equipment, the service data does not need to be subjected to photoelectric conversion, and the processing complexity and cost are reduced.
As will be appreciated by one of ordinary skill in the art, various aspects of the invention, or possible implementations of various aspects, may be embodied as a system, method, or computer program product. Accordingly, aspects of the present invention, or possible implementations of aspects, may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a "circuit," module "or" system. Furthermore, aspects of the invention, or possible implementations of aspects, may take the form of a computer program product, which refers to computer-readable program code stored in a computer-readable medium.
The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as Random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, and portable read-only memory (CD-ROM).
A processor in the computer reads the computer-readable program code stored in the computer-readable medium, so that the processor can perform the functional actions specified in each step, or a combination of steps, in the flowcharts; and means for generating a block diagram that implements the functional operation specified in each block or a combination of blocks.
The computer readable program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. It should also be noted that, in some alternative implementations, the functions noted in the flowchart or block diagram block may occur out of the order noted in the figures. For example, two steps or two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various modifications or alterations to the present invention without departing from the spirit and scope of the present invention as disclosed in the specification.
Claims (17)
1. A method for operation, administration and maintenance (OAM) overhead configuration, the method comprising:
receiving service data from a client side, mapping the service data into a first subcarrier signal, and mapping OAM overhead corresponding to the service data into a second subcarrier signal;
multiplexing the first subcarrier signal and the second subcarrier signal into the same sub-band signal in a frequency division multiplexing mode, and sending the sub-band signal out from a network side.
2. The method according to claim 1, wherein the mapping the OAM overhead corresponding to the service data into a second subcarrier signal specifically includes:
the OAM overhead comprises a multiplexing section OAM overhead and a channel section OAM overhead, and the second subcarrier signal comprises two subcarrier signals;
and mapping the multiplexing section OAM overhead to one of the two subcarrier signals, and mapping the channel section OAM overhead to the other of the two subcarrier signals.
3. The method of claim 1 or 2, wherein prior to transmission from the network side, the method further comprises:
generating a waveband signal by the sub-waveband signal in a frequency division multiplexing mode;
the sending the sub-band signal from the network side specifically includes:
and sending the wave band signal out from a network side.
4. A method for operation, administration and maintenance (OAM) overhead configuration, the method comprising:
receiving a sub-band signal from a network side, wherein the sub-band signal comprises a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data;
and demultiplexing the sub-band signal to obtain the first sub-carrier signal, and sending the first sub-carrier signal from a client side.
5. The method of claim 4, wherein when the second subcarrier signal needs to be modified, the method further comprises:
acquiring a second subcarrier signal to be modified from the wavelet band signal, and generating a new second subcarrier signal after performing photoelectric conversion on the second subcarrier signal to be modified;
multiplexing the new second subcarrier signal and the first subcarrier signal into the same new wavelet band signal in a frequency division multiplexing mode, and sending the new wavelet band signal out from the network side.
6. The method of claim 4 or 5, wherein the OAM overhead comprises a multiplex section OAM overhead and a channel section OAM overhead, and wherein the second subcarrier signal comprises two subcarrier signals, one of the two subcarrier signals having the multiplex section OAM overhead mapped thereto and the other of the two subcarrier signals having the channel section OAM overhead mapped thereto.
7. The method of claim 5, wherein the second subcarrier signal that needs to be modified is a subcarrier signal to which the multiplex section OAM overhead is mapped.
8. The method of claim 6, wherein after said demultiplexing said sub-band signal, further comprising:
obtaining a subcarrier signal mapped with the channel section OAM overhead;
and sending the subcarrier signal mapped with the channel section OAM overhead from a client side.
9. An apparatus for operation, administration and maintenance, OAM, overhead configuration, the apparatus comprising:
the receiving module is used for receiving the service data from the client side;
a mapping module, configured to map the service data to a first subcarrier signal, and map an OAM overhead corresponding to the service data to a second subcarrier signal;
the multiplexing module is used for multiplexing the first subcarrier signal and the second subcarrier signal into the same subcarrier signal in a frequency division multiplexing mode;
and the sending module is used for sending the sub-band signal from a network side.
10. The apparatus of claim 9, wherein the OAM overhead comprises a multiplex section OAM overhead and a channel section OAM overhead, the second subcarrier signal comprising two subcarrier signals;
the mapping module is specifically configured to: and mapping the multiplexing section OAM overhead to one of the two subcarrier signals, and mapping the channel section OAM overhead to the other of the two subcarrier signals.
11. The apparatus of claim 9 or 10, wherein the multiplexing module is further configured to: generating a waveband signal by the sub-waveband signal in a frequency division multiplexing mode;
and the sending module is used for sending the waveband signal out from a network side.
12. An apparatus for operation, administration and maintenance, OAM, overhead configuration, the apparatus comprising:
the receiving module is used for receiving a sub-band signal from a network side, wherein the sub-band signal comprises a first sub-carrier signal mapped with service data and a second sub-carrier signal mapped with OAM overhead corresponding to the service data;
the demultiplexing module is used for demultiplexing the sub-band signal to obtain the first sub-carrier signal;
and the sending module is used for sending the first subcarrier signal out from the client side.
13. The apparatus of claim 12, wherein the apparatus further comprises: a modification module and a multiplexing module, wherein,
the modification module is used for acquiring a second subcarrier signal to be modified from the subcarrier signal when the second subcarrier signal needs to be modified, and generating a new second subcarrier signal after performing photoelectric conversion on the second subcarrier signal to be modified;
the multiplexing module is used for multiplexing the new second subcarrier signal and the first subcarrier signal into the same new subcarrier signal in a frequency division multiplexing mode;
and the sending module is used for sending the new sub-band signal out from the network side.
14. The apparatus of claim 12 or 13, wherein the OAM overhead comprises a multiplex section OAM overhead and a channel section OAM overhead, and wherein the second subcarrier signal comprises two subcarrier signals, one of the two subcarrier signals mapping the multiplex section OAM overhead and the other of the two subcarrier signals mapping the channel section OAM overhead.
15. The apparatus of claim 13, wherein the second subcarrier signal that needs to be modified is a subcarrier signal to which the multiplex section OAM overhead is mapped.
16. The apparatus of claim 14, wherein the demultiplexing module is further to: obtaining a subcarrier signal mapped with the channel section OAM overhead;
and the sending module is used for sending the subcarrier signal mapped with the channel section OAM overhead from a client side.
17. A system for operation, administration and maintenance, OAM, overhead configuration, the system comprising: an OAM overhead configuring device as recited in any of claims 9-11 and an OAM overhead configuring device as recited in any of claims 12-16.
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