CN108737031B - Data spectrum reconstruction transmission method, device, controller and storage medium - Google Patents
Data spectrum reconstruction transmission method, device, controller and storage medium Download PDFInfo
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Abstract
The invention discloses a data spectrum reconstruction transmission method, a data spectrum reconstruction transmission device, a controller and a storage medium. The method comprises the following steps: judging whether the quantity of continuous spectrum resources available for new data service allocation reaches a preset value; when the quantity of continuous spectrum resources available for new data service allocation does not reach the preset value, determining that the coding mode is a Raptor-RS cascade coding mode, dividing the data service stream to be transmitted into a plurality of original data packets, and respectively carrying out Raptor coding on the plurality of original data packets to generate a plurality of Raptor coding data packets; respectively carrying out RS coding on each Raptor coding data packet to generate a plurality of RS coding data packets; modulating an electrical signal containing the RS encoded data packet to generate a first optical signal having an initial wavelength; and converting the initial wavelength of the first optical signal into a preset wavelength to be sent. Compared with the traditional spectrum reconstruction technology, the method can obviously reduce the resource allocation time, improve the spectrum reconstruction efficiency and reduce the network blocking rate.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data spectrum reconstruction transmission method, apparatus, controller, and storage medium.
Background
With the vigorous development of internet services and the wide application of broadband services such as high-definition video and the like, the services such as data, voice, video and the like are rapidly increased, and the IP service flow of a user is doubled every two years, so that the information volume is explosively increased. Optical transport networks face the demands and challenges of high bandwidth and strong bursty traffic, and therefore, flexible optical networks supporting efficient spectrum utilization have come into force. The elastic optical network can dynamically select a proper modulation format and a proper protection bandwidth for data services with different granularities based on a certain strategy, and dynamically allocate corresponding resources for the services, thereby improving the utilization rate of frequency spectrum resources in the network and the service transmission rate.
Because the spectrum of the elastic optical network must satisfy the consistency and continuity constraints, after a period of operation, a lot of spectrum fragments which cannot be utilized appear in the network, which results in the reduction of the network spectrum utilization rate. The spectrum fragments need to be integrated into a continuous spectrum segment through a spectrum reconstruction algorithm, so that the waste of spectrum resources is avoided. In the process of spectrum migration of data service, in order to prevent service interruption, the prior art scheme is to slowly adjust the frequencies of the transmitter and the receiver at the same time, so that the frequencies are always kept consistent, therefore, the resource allocation time is longer, and the spectrum migration efficiency is lower.
Disclosure of Invention
In view of this, embodiments of the present invention provide a data spectrum reconstruction transmission method, apparatus, controller, and storage medium, so as to solve the problem that a large number of spectrum fragments that cannot be utilized occur in an elastic optical network system, which results in a reduction in network spectrum utilization; and the problems of longer resource allocation time, lower spectrum migration efficiency and network blockage in the spectrum reconstruction process.
According to a first aspect, an embodiment of the present invention provides a data spectrum reconstruction transmission method, including the following steps: judging whether the quantity of continuous spectrum resources available for new data service allocation reaches a preset value; when the quantity of continuous spectrum resources available for new data service allocation does not reach the preset value, determining that the coding mode is a Raptor-RS cascade coding mode, dividing the data service stream to be transmitted into a plurality of original data packets, and respectively carrying out Raptor coding on the plurality of original data packets to generate a plurality of Raptor coding data packets; respectively carrying out RS coding on each Raptor coding data packet to generate a plurality of RS coding data packets; modulating an electrical signal containing the RS encoded data packet to generate a first optical signal having an initial wavelength; and converting the initial wavelength of the first optical signal into a preset wavelength to be sent.
In the embodiment of the invention, the coding and decoding mode of the data service stream with the frequency spectrum fragments in the elastic optical network system is determined to be a Raptor-RS cascade coding and decoding mode, and then the transmitted wavelength and the received wavelength are simultaneously and quickly adjusted to be consistent, so that the quick frequency spectrum migration of the data service is realized.
With reference to the first aspect, in the first implementation manner of the first aspect, when the number of consecutive spectrum resources available for new data service allocation reaches the preset value, it is determined that a coding mode is a normal FEC coding mode, and normal FEC coding is performed on a data service stream to be transmitted to generate a normal FEC coding packet; modulating the electrical signal containing the ordinary FEC encoded data packet to generate a second optical signal with an initial wavelength; and converting the initial wavelength of the second optical signal into a preset wavelength and sending the preset wavelength.
With reference to the first aspect or the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the converting an initial wavelength of the first optical signal into a preset wavelength and sending the preset wavelength includes: searching an idle wavelength channel in a transmission channel, and determining the number of the idle wavelength channel; judging whether the number of transmission channels occupied by the first optical signal is consistent with the number of the channels; when the number of transmission channels occupied by the first optical signal is consistent with the number of the channels, converting the initial wavelength of the first optical signal into the preset wavelength of the idle wavelength channel; and moving the first optical signal converted into the preset wavelength to the idle wavelength channel for sending.
In the embodiment of the invention, the signal to be transmitted is moved to the idle wavelength channel for transmission, thereby filling up the fragments in the spectrum resource, ensuring that the spectrum meets the constraint of consistency and continuity, avoiding the waste of the spectrum resource caused by the existence of the spectrum fragments and improving the utilization rate of the spectrum resource.
According to a second aspect, an embodiment of the present invention provides a data spectrum reconstruction transmission method, including the following steps: acquiring the converted optical signal with the preset wavelength; demodulating the optical signal to generate an electrical signal containing an encoded data packet; when the coding mode is a Raptor-RS cascade coding mode, RS decoding is carried out on the coding data packet to generate a Raptor coding data packet; judging whether the bit error rate of the Raptor coding data packet is 0 or not; when the bit error rate of the Raptor coded data packet is 0, storing the generated Raptor coded data packet until the Raptor coded data packet reaches a preset number; and carrying out Raptor decoding on the Raptor coding data packets in preset quantity to generate a plurality of original data packets.
With reference to the second aspect, in the first embodiment of the second aspect, when the bit error rate of the Raptor-encoded packet is not 0, the generated Raptor-encoded packet is discarded.
With reference to the second aspect, in a second implementation manner of the second aspect, when it is determined that the coding mode is the normal FEC coding mode, the encoded data packet is subjected to normal FEC decoding, and a plurality of original data packets are generated.
According to a third aspect, an embodiment of the present invention provides a data spectrum reconstruction transmission apparatus, including: the first judgment module is used for judging whether the quantity of continuous spectrum resources which can be allocated by the new data service reaches a preset value; the coding and decoding mode determining module is used for determining that the coding and decoding mode is a Raptor-RS cascade coding and decoding mode when the quantity of continuous spectrum resources which can be allocated by a new data service does not reach the preset value; a Raptor coding module, configured to divide a data service stream to be transmitted into a plurality of original data packets, perform Raptor coding on the plurality of original data packets, respectively, and generate a plurality of Raptor coded data packets; the RS coding module is used for respectively carrying out RS coding on each Raptor coding data packet to generate a plurality of RS coding data packets; the modulation module is used for modulating the electric signal containing the RS coded data packet to generate a first optical signal with an initial wavelength; and the wavelength conversion module is used for converting the initial wavelength of the first optical signal into a preset wavelength to be sent.
In the embodiment of the invention, Raptor-RS cascade coding is firstly carried out on the data service flow with the frequency spectrum fragments in the elastic optical network system, and then the sent wavelength and the received wavelength are simultaneously and quickly adjusted to be consistent, so that the quick frequency spectrum migration of the data service is realized.
With reference to the third aspect, in a first implementation manner of the third aspect, when the number of consecutive spectrum resources available for new data service allocation reaches the preset value, the coding mode determining module determines that the coding mode is a normal FEC coding mode, and the data spectrum reconfiguration transmitting apparatus further includes: the common FEC encoding module is used for performing common FEC encoding on data service flow to be transmitted to generate a common FEC encoding data packet; the modulation module is further used for modulating the electric signal containing the common FEC encoding data packet to generate a second optical signal with an initial wavelength; the wavelength conversion module is further configured to convert the initial wavelength of the second optical signal to a preset wavelength, and send the preset wavelength.
With reference to the third aspect, in a second implementation of the third aspect, the wavelength conversion module includes: the idle channel number determining submodule is used for searching idle wavelength channels in the transmission channel and determining the channel number of the idle wavelength channels; the first judgment submodule is used for judging whether the number of transmission channels occupied by the first optical signal is consistent with the number of the channels; the wavelength conversion sub-module is used for converting the initial wavelength of the first optical signal into the preset wavelength of the idle wavelength channel when the number of the transmission channels occupied by the first optical signal is consistent with the number of the channels; and the sending submodule is used for moving the first optical signal converted into the preset wavelength to the idle wavelength channel for sending.
In the embodiment of the invention, the signal to be transmitted is moved to the idle wavelength channel for transmission, thereby filling up the fragments in the spectrum resource, ensuring that the spectrum meets the constraint of consistency and continuity, avoiding the waste of the spectrum resource caused by the existence of the spectrum fragments and improving the utilization rate of the spectrum resource.
According to a fourth aspect, an embodiment of the present invention provides a data spectrum reconstruction transmission apparatus, including: the receiving module is used for acquiring the converted optical signal with the preset wavelength; the demodulation module is used for demodulating the optical signal and generating an electric signal containing an encoded data packet; the RS decoding module is used for carrying out RS decoding on the coded data packet to generate a Raptor coded data packet when the coding mode is a Raptor-RS cascade coding mode; the second judgment module is used for judging whether the bit error rate of the Raptor coded data packet is 0 or not; the data storage module stores the generated Raptor coded data packets when the bit error rate of the Raptor coded data packets is 0 until the Raptor coded data packets reach a preset number; and the Raptor decoding module is used for carrying out Raptor decoding on the Raptor coding data packets in preset quantity to generate a plurality of original data packets.
With reference to the fourth aspect, in the first embodiment of the fourth aspect, when the bit error rate of the Raptor-encoded packet is not 0, the generated Raptor-encoded packet is discarded.
With reference to the fourth aspect, in a second embodiment of the fourth aspect, the method further includes: and the common FEC decoding module is used for performing common FEC decoding on the coded data packet to generate a plurality of original data packets when the coding mode is determined to be the common FEC coding mode.
According to a fifth aspect, an embodiment of the present invention provides a controller, including: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing therein computer instructions, and the processor executing the computer instructions to perform the data spectrum reconstruction transmission method according to the first aspect or any one of the embodiments of the first aspect, or to perform the data spectrum reconstruction transmission method according to the second aspect or any one of the embodiments of the second aspect.
According to a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer instructions for causing a computer to execute the data spectrum reconstruction transmission method described in the first aspect or any one of the implementation manners of the first aspect, or execute the data spectrum reconstruction transmission method described in the second aspect or any one of the implementation manners of the second aspect.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 shows a flow chart of a data spectrum reconstruction transmission method according to an embodiment of the present invention;
FIG. 2 is a flowchart showing the detailed process of step S105 according to the embodiment of the present invention;
FIG. 3 illustrates a spectral reconstruction diagram of an embodiment of the present invention;
fig. 4 shows a flow chart of a data spectrum reconstruction transmission method according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a data spectrum reconstruction transmission apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram illustrating a specific structure of the wavelength conversion module 56 of the data spectrum reconstruction transmission apparatus according to the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a data spectrum reconstruction transmission apparatus according to another embodiment of the present invention;
FIG. 8 is a system block diagram illustrating an embodiment of the present invention applied to a resilient optical network;
FIG. 9 is a flow chart of a method applied to a resilient optical network according to an embodiment of the present invention;
fig. 10 is a schematic diagram showing a hardware configuration of a controller according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present 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.
An embodiment of the present invention provides a data spectrum reconstruction transmission method, as shown in fig. 1, the data spectrum reconstruction transmission method includes:
step S101: judging whether spectrum reconstruction is needed, and particularly judging whether the quantity of continuous spectrum resources available for new data service allocation reaches a preset value; when the quantity of continuous spectrum resources available for new data service allocation does not reach the preset value, spectrum reconstruction is needed, and the coding mode is determined to be a Raptor-RS cascade coding mode;
step S102: dividing a data service stream to be transmitted into a plurality of original data packets, and respectively carrying out Raptor coding on the plurality of original data packets to generate a plurality of Raptor coding data packets;
step S103, respectively carrying out RS coding on each Raptor coded data packet to generate a plurality of RS coded data packets;
step S104: modulating an electrical signal containing the RS encoded data packet to generate a first optical signal having an initial wavelength; in a preferred embodiment, the first optical signal can be visible light or infrared light;
step S105: and converting the initial wavelength of the first optical signal into a preset wavelength to be sent.
Optionally, when the number of consecutive spectrum resources available for new data service allocation reaches the preset value, spectrum reconstruction is not required, and when it is determined that the coding mode is the normal FEC coding mode, the method further includes step S106: carrying out common FEC encoding on data service flow to be transmitted to generate a common FEC encoding data packet; further, at this time, in step S104, the electrical signal containing the ordinary FEC encoded data packet is modulated to generate a second optical signal with an initial wavelength; and converting the initial wavelength of the second optical signal into a preset wavelength and sending the preset wavelength.
In a preferred embodiment, as shown in fig. 2, the step S105: a process of converting the initial wavelength of the first optical signal into a preset wavelength for transmission specifically includes:
step S201: searching an idle wavelength channel in a transmission channel, and determining the number of the idle wavelength channel;
step S202: judging whether the number of transmission channels occupied by the first optical signal is consistent with the number of the channels;
step S203: when the number of transmission channels occupied by the first optical signal is consistent with the number of the channels, converting the initial wavelength of the first optical signal into the preset wavelength of the idle wavelength channel;
step S204: and moving the first optical signal converted into the preset wavelength to the idle wavelength channel for sending.
As shown in fig. 3, which is a schematic diagram of data spectrum reconstruction according to an embodiment of the present invention, it is assumed that there are 8 wavelength channels (λ) in the elastic optical network system1，λ2...λ3) For transmitting data traffic, and A, B, C three data traffic are being transmitted, wherein traffic a occupies two wavelength channels, traffic B occupies one wavelength channel, and traffic C occupies two wavelength channels. The service D is a new service, and needs to occupy 3 wavelength channels, but if there are not enough continuous wavelength channels available, spectrum reconstruction is needed. Find out the wavelength in the transmission channel is lambda3、λ4And λ8Is free of channels in which λ3And λ4Continuously; at this time, the data traffic C occupying 2 wavelength channels is represented by the wavelength λ6、λ7Is shifted to a wavelength lambda3、λ4Is transmitted on the free channel, so that the wavelength is lambda6、λ7Is free, plus the connected wavelength is lambda8Of idle channels of respective lambda component wavelength6、λ7、λ83 continuous idle preset wavelength channels; judging that the newly added service D needs to occupy 3 wavelength channels, the number of the channels is the same as the number of the preset wavelength channels, and distributing the newly added data service D to the idle wavelength channels (lambda)6、λ7、λ8) And the transmission is performed.
An embodiment of the present invention further provides a data spectrum reconstruction transmission method, as shown in fig. 4, the data spectrum reconstruction transmission method includes:
step S401: acquiring the converted optical signal with the preset wavelength; in a preferred embodiment, the optical signal may be visible light or infrared light;
step S402: demodulating the optical signal to generate an electrical signal containing an encoded data packet;
step S403: when the coding mode is a Raptor-RS cascade coding mode, RS decoding is carried out on the coding data packet to generate a Raptor coding data packet;
step S404: judging whether the bit error rate of the Raptor coding data packet is 0 or not;
when the bit error rate of the Raptor coded data packet is 0, storing the generated Raptor coded data packet until the Raptor coded data packet reaches a preset number; and when the bit error rate of the Raptor coded data packet is not 0, discarding the generated Raptor coded data packet.
Step S405: and carrying out Raptor decoding on the Raptor coding data packets in preset quantity to generate a plurality of original data packets.
Optionally, when it is determined that the coding mode is the normal FEC coding mode, the method further includes step S406: and carrying out common FEC decoding on the coded data packet to generate a plurality of original data packets.
An embodiment of the present invention provides a data spectrum reconstruction transmission device, as shown in fig. 5, the data spectrum reconstruction transmission device includes:
a first judging module 51, configured to judge whether the number of consecutive spectrum resources available for new data service allocation reaches a preset value; the details can be referred to the description of step S101 of the above embodiment.
A coding and decoding mode determining module 52, configured to determine that the coding and decoding mode is a Raptor-RS cascaded coding and decoding mode when the number of consecutive spectrum resources available for new data service allocation does not reach the preset value;
a Raptor coding module 53, configured to divide a data service stream to be transmitted into a plurality of original data packets, and perform Raptor coding on the plurality of original data packets, respectively, to generate a plurality of Raptor coded data packets; the details can be referred to the description of step S102 of the above embodiment.
An RS encoding module 54, configured to perform RS encoding on each Raptor encoded data packet, respectively, to generate multiple RS encoded data packets; the details can be referred to the description of step S103 of the above embodiment.
A modulation module 55, configured to modulate the electrical signal containing the RS encoded data packet to generate a first optical signal having an initial wavelength; the details can be referred to the description of step S104 of the above embodiment.
And a wavelength conversion module 56, configured to convert the initial wavelength of the first optical signal into a preset wavelength for transmission. The details can be referred to the description of step S105 of the above embodiment.
Optionally, when the number of consecutive spectrum resources available for new data service allocation reaches the preset value, the coding mode determining module determines that the coding mode is a normal FEC coding mode, and the data spectrum reconfiguration transmitting apparatus further includes: a common FEC encoding module 57, configured to perform common FEC encoding on a data service stream to be transmitted, to generate a common FEC encoded data packet; the details can be referred to the description of step S106 of the above embodiment. The modulation module 55 is further configured to modulate the electrical signal containing the generic FEC encoded data packet to generate a second optical signal with an initial wavelength; the wavelength conversion module 56 is further configured to convert the initial wavelength of the second optical signal into a preset wavelength, and send the preset wavelength.
As shown in fig. 6, the wavelength conversion module 56 specifically includes: a free channel number determination submodule 561, a first judgment submodule 562, a wavelength conversion submodule 563, and a transmission submodule 564.
The number-of-idle channels determining submodule 561 is configured to search for an idle wavelength channel in a transmission channel, and determine the number of channels of the idle wavelength channel; the details can be referred to the description of step S201 of the above embodiment.
A first determining submodule 562, configured to determine whether the number of transmission channels occupied by the first optical signal is consistent with the number of channels; the details can be referred to the description of step S202 of the above embodiment.
A wavelength conversion sub-module 563, configured to convert an initial wavelength of the first optical signal into a preset wavelength of the idle wavelength channel when the number of transmission channels occupied by the first optical signal is consistent with the number of channels; the details can refer to the description of step S203 of the above embodiment.
The transmitting submodule 564 is configured to move the first optical signal converted into the preset wavelength to the idle wavelength channel for transmission; the details can be referred to the description of step S204 of the above embodiment.
An embodiment of the present invention further provides a data spectrum reconstruction transmission device, as shown in fig. 7, the data spectrum reconstruction transmission device includes:
a receiving module 71, configured to obtain the converted optical signal with the preset wavelength; the details can refer to the description of step S401 of the above embodiment.
A demodulation module 72, configured to demodulate the optical signal to generate an electrical signal containing an encoded data packet; the details can be referred to the description of step S402 of the above embodiment.
The RS decoding module 73 is configured to perform RS decoding on the encoded data packet to generate a Raptor encoded data packet when the coding mode is a Raptor-RS cascade coding mode; the details can be referred to the description of step S403 of the above embodiment.
A second judging module 74, configured to judge whether a bit error rate of the Raptor-encoded data packet is 0; when the bit error rate of the Raptor coding data packet is not 0, discarding the generated Raptor coding data packet; the details can be referred to the description of step S404 of the above embodiment.
A data storage module 75, configured to, when the bit error rate of the Raptor-encoded data packet is 0, store the generated Raptor-encoded data packet by the data storage module 75 until the Raptor-encoded data packet reaches a preset number;
a Raptor decoding module 76, configured to Raptor decode a preset number of Raptor encoded data packets to generate a plurality of original data packets; the details can be referred to the description of step S405 of the above embodiment.
Optionally, the data spectrum reconstruction transmission apparatus further includes: a normal FEC decoding module 77, configured to, when it is determined that the coding mode is the normal FEC coding mode, perform normal FEC decoding on the encoded data packet by the normal FEC decoding module 77, and generate a plurality of original data packets; the details can be referred to the description of step S406 of the above embodiment.
Optionally, in some embodiments of the present invention, the data spectrum reconstruction transmission method and apparatus provided in the embodiments of the present invention may be applied to a control system for data transmission based on an elastic optical network, as shown in fig. 8, where the control system mainly includes a Raptor-RS cascade coding module 81, a modulator 82, a wavelength variable optical transmitter 83, a wavelength variable optical receiver 84, a demodulator 85, a Raptor-RS cascade decoding module 86, a common FEC coding module 87, a common FEC decoding module 88, and a controller 89. The Raptor-RS cascade coding module is divided into a Raptor coding module and an RS coding module; the Raptor-RS cascade decoding module is divided into a Raptor decoding module and an RS decoding module.
When the data generated by the source does not have the spectrum fragments, the data generates the FEC encoding data packet through the common FEC encoding module 87, and then the electrical signal is changed into the data with the wavelength of lambda through the modulator 820Is converted to a specific wavelength (lambda) by the wavelength-variable optical transmitter 831，λ2...λn) And is emitted. The optical signal reaches the wavelength-variable optical receiver 84 at the receiving end through the optical fiber channel, and the specific wavelength (lambda)1，λ2...λn) Is converted into an optical signal having a wavelength lambda0The optical signal is sent to a demodulator 85, the demodulator 85 completes photoelectric conversion, and the signal output by the demodulator 85 is restored to original data through a common FEC decoding module 88.
When the data generated by the information source has frequency spectrum fragments, a Raptor coding module of a Raptor-RS cascade coding module 81 groups the data service flow generated by the information source to generate k original data packets, wherein the length of each data packet is l; raptor coding is carried out on the k data packets to generate n (n > k) Raptor coding data packets with the length of l; and then RS coding is carried out on each Raptor coding data packet to generate n RS coding data packets with the length of m. Modulating the electrical signal containing the RS encoded data packet by a modulator 82 to generate an optical signal with an initial wavelength; the controller 89 searches for an idle wavelength channel in a transmission channel, determines the number of channels of the idle wavelength channel, and judges whether the number of transmission channels occupied by the optical signal is consistent with the number of channels; when the number of transmission channels occupied by the optical signal is consistent with the number of channels, the wavelength-variable optical transmitter 83 converts the initial wavelength of the optical signal into the preset wavelength of the idle wavelength channel, and moves the optical signal converted into the preset wavelength into the idle wavelength channel to be transmitted. The wavelength variable optical receiver 84 receives the optical signal, and sends the optical signal to the demodulator 85 for demodulation, so as to generate an electrical signal containing an RS encoded data packet; an RS decoding module of the Raptor-RS cascade decoding module 86 decodes the received RS encoding data packet to generate an Raptor encoding data packet; judging whether the bit error rate of the Raptor coding data packet is 0 or not; when the bit error rate of the Raptor coded data packet is 0, storing the generated Raptor coded data packet until the Raptor coded data packet reaches a preset number; when the bit error rate of the Raptor coded data packet is not 0, discarding the Raptor coded data packet; when the Raptor decoding module receives enough Raptor coding data packets (slightly larger than n), Raptor decoding is carried out on the Raptor coding data packets, and then k original data packets can be recovered.
The method and the device for reconstructing and transmitting the data spectrum provided by the embodiment of the invention are applied to a method flowchart of an elastic optical network, as shown in fig. 9.
Step 1: and switching the FEC mode. When the spectrum resources are not utilized by 100 percent and new data services need to be allocated, but not enough continuous spectrum resources can be allocated, namely spectrum fragments exist, spectrum reconstruction is needed, data is switched to a Raptor-RS cascade coding module from a common FEC coding module, a Raptor-RS cascade coding module generates Raptor-RS coding data packets, a receiving end can continuously receive the Raptor-RS coding data packets, and when enough coding data packets are received, the original data packets can be recovered through the Raptor-RS cascade decoding module, so that the continuity of the data services is ensured.
Step 2: and switching wavelength channels. Controller checkingFinding the free spectrum resource in the elastic optical network, and then controlling the wavelength-variable optical transmitter and the wavelength-variable optical receiver to transmit the data service from the current wavelength lambdaaShifted to idle wavelength λbThe operating wavelength of the wavelength-variable optical transmitter and the wavelength-variable optical receiver is simultaneously changed from lambdaaSwitching to λb。
And step 3: when the wavelength switching is completed, the link is in normal communication, and the data is switched to the common FEC coding module from the Raptor-RS coding module.
An embodiment of the present invention further provides a controller, as shown in fig. 10, the controller may include a processor 101 and a memory 102, where the processor 101 and the memory 102 may be connected by a bus or in another manner, and fig. 10 illustrates the connection by the bus as an example.
The processor 101 may be a Central Processing Unit (CPU). The Processor 101 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 102, which is a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the data spectrum reconstruction transmission apparatus in the embodiment of the present invention (for example, the first determining module 51, the coding mode determining module 52, the Raptor coding module 53, the RS coding module 54, the modulation module 55, the wavelength conversion module 56, and the general FEC coding module 57 shown in fig. 5). The processor 101 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 102, that is, implements the data spectrum reconstruction transmission method in the above method embodiment.
The memory 102 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 101, and the like. Further, the memory 102 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 102 may optionally include memory located remotely from processor 101, which may be connected to processor 101 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 102 and, when executed by the processor 101, perform the data spectrum reconstruction transmission method in the embodiments shown in fig. 1-4.
The specific details of the controller may be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to 9, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (12)
1. A data spectrum reconstruction transmission method is characterized by comprising the following steps:
judging whether the quantity of continuous spectrum resources available for new data service allocation reaches a preset value;
when the quantity of continuous spectrum resources available for new data service allocation does not reach the preset value, determining that the coding mode is a Raptor-RS cascade coding mode, dividing the data service stream to be transmitted into a plurality of original data packets, and respectively carrying out Raptor coding on the plurality of original data packets to generate a plurality of Raptor coding data packets;
respectively carrying out RS coding on each Raptor coding data packet to generate a plurality of RS coding data packets;
modulating an electrical signal containing the RS encoded data packet to generate a first optical signal having an initial wavelength;
converting the initial wavelength of the first optical signal into a preset wavelength to be sent;
converting the initial wavelength of the first optical signal into a preset wavelength to be transmitted specifically includes:
searching an idle wavelength channel in a transmission channel, and determining the number of the idle wavelength channel;
judging whether the number of transmission channels occupied by the first optical signal is consistent with the number of the channels;
when the number of transmission channels occupied by the first optical signal is consistent with the number of the channels, converting the initial wavelength of the first optical signal into the preset wavelength of the idle wavelength channel;
and moving the first optical signal converted into the preset wavelength to the idle wavelength channel for sending.
2. The method for data spectrum reconstruction transmission according to claim 1, further comprising: when the number of continuous spectrum resources available for new data service allocation reaches the preset value, determining that the coding mode is a common FEC coding mode, and performing common FEC coding on data service flow to be transmitted to generate a common FEC coding data packet;
modulating the electrical signal containing the ordinary FEC encoded data packet to generate a second optical signal with an initial wavelength;
and converting the initial wavelength of the second optical signal into a preset wavelength and sending the preset wavelength.
3. A data spectrum reconstruction transmission method is characterized by comprising the following steps:
acquiring a converted optical signal with a preset wavelength, wherein the preset wavelength is an idle wavelength channel in a transmission channel;
demodulating the optical signal to generate an electrical signal containing an encoded data packet;
when the coding mode is a Raptor-RS cascade coding mode, RS decoding is carried out on the coding data packet to generate a Raptor coding data packet;
judging whether the bit error rate of the Raptor coding data packet is 0 or not;
when the bit error rate of the Raptor coded data packet is 0, storing the generated Raptor coded data packet until the Raptor coded data packet reaches a preset number;
and carrying out Raptor decoding on the Raptor coding data packets in preset quantity to generate a plurality of original data packets.
4. The method for data spectrum reconstruction transmission according to claim 3, further comprising:
and when the bit error rate of the Raptor coded data packet is not 0, discarding the generated Raptor coded data packet.
5. The method for data spectrum reconstruction transmission according to claim 3, further comprising: and when the coding mode is determined to be a common FEC coding mode, performing common FEC decoding on the coded data packet to generate a plurality of original data packets.
6. A data spectrum reconstruction transmission apparatus, comprising:
the first judgment module is used for judging whether the quantity of continuous spectrum resources which can be allocated by the new data service reaches a preset value;
the coding and decoding mode determining module is used for determining that the coding and decoding mode is a Raptor-RS cascade coding and decoding mode when the quantity of continuous spectrum resources which can be allocated by a new data service does not reach the preset value;
a Raptor coding module, configured to divide a data service stream to be transmitted into a plurality of original data packets, perform Raptor coding on the plurality of original data packets, respectively, and generate a plurality of Raptor coded data packets;
the RS coding module is used for respectively carrying out RS coding on each Raptor coding data packet to generate a plurality of RS coding data packets;
the modulation module is used for modulating the electric signal containing the RS coded data packet to generate a first optical signal with an initial wavelength;
the wavelength conversion module is used for converting the initial wavelength of the first optical signal into a preset wavelength to be sent;
wherein the wavelength conversion module comprises:
the idle channel number determining submodule is used for searching idle wavelength channels in the transmission channel and determining the channel number of the idle wavelength channels;
the first judgment submodule is used for judging whether the number of transmission channels occupied by the first optical signal is consistent with the number of the channels;
the wavelength conversion sub-module is used for converting the initial wavelength of the first optical signal into the preset wavelength of the idle wavelength channel when the number of the transmission channels occupied by the first optical signal is consistent with the number of the channels;
and the sending submodule is used for moving the first optical signal converted into the preset wavelength to the idle wavelength channel for sending.
7. The data spectrum reconfiguration transmission apparatus according to claim 6, wherein when the number of consecutive spectrum resources available for new data service allocation reaches the preset value, the coding mode determining module determines that the coding mode is a normal FEC coding mode, and the data spectrum reconfiguration transmission apparatus further comprises:
the common FEC encoding module is used for performing common FEC encoding on data service flow to be transmitted to generate a common FEC encoding data packet;
the modulation module is further used for modulating the electric signal containing the common FEC encoding data packet to generate a second optical signal with an initial wavelength;
the wavelength conversion module is further configured to convert the initial wavelength of the second optical signal to a preset wavelength, and send the preset wavelength.
8. A data spectrum reconstruction transmission apparatus, comprising:
the receiving module is used for acquiring the converted optical signal with the preset wavelength, wherein the preset wavelength is an idle wavelength channel in the transmission channel;
the demodulation module is used for demodulating the optical signal and generating an electric signal containing an encoded data packet;
the RS decoding module is used for carrying out RS decoding on the coded data packet to generate a Raptor coded data packet when the coding mode is a Raptor-RS cascade coding mode;
the second judgment module is used for judging whether the bit error rate of the Raptor coded data packet is 0 or not;
the data storage module stores the generated Raptor coded data packets when the bit error rate of the Raptor coded data packets is 0 until the Raptor coded data packets reach a preset number;
and the Raptor decoding module is used for carrying out Raptor decoding on the Raptor coding data packets in preset quantity to generate a plurality of original data packets.
9. The apparatus for data spectrum reconstruction transmission according to claim 8, wherein when the bit error rate of the Raptor-encoded packet is not 0, the generated Raptor-encoded packet is discarded.
10. The data spectrum reconstruction transmission device of claim 8, further comprising: and the common FEC decoding module is used for performing common FEC decoding on the coded data packet to generate a plurality of original data packets when the coding mode is determined to be the common FEC coding mode.
11. A controller, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the data spectrum reconstruction transmission method according to claim 1 or 2, or to perform the data spectrum reconstruction transmission method according to any one of claims 3 to 5.
12. A computer-readable storage medium having stored thereon computer instructions for causing a computer to execute the data spectrum reconstruction transmission method of claim 1 or 2, or the data spectrum reconstruction transmission method of any one of claims 3-5.
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