CN107509125B - Distributed photoelectric hybrid switching structure - Google Patents
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- CN107509125B CN107509125B CN201710571631.2A CN201710571631A CN107509125B CN 107509125 B CN107509125 B CN 107509125B CN 201710571631 A CN201710571631 A CN 201710571631A CN 107509125 B CN107509125 B CN 107509125B
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- H04Q11/00—Selecting arrangements for multiplex systems
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- H—ELECTRICITY
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- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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- H04Q2011/0026—Construction using free space propagation (e.g. lenses, mirrors)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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- H04Q2011/0073—Provisions for forwarding or routing, e.g. lookup tables
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Abstract
The invention discloses a distributed photoelectric hybrid switching structure, which comprises: the system comprises a front stage exchange unit, a middle stage exchange unit and a rear stage exchange unit; the front-stage exchange unit comprises k front-stage photoelectric exchange basic units and j front-stage photoelectric exchange basic units; the intermediate stage switching unit comprises an optical switching unit and an electric switching unit; the rear stage exchange unit comprises k rear stage electro-optical exchange basic units and j rear stage photoelectric exchange basic units. The invention solves the problems of low expandability of the existing structure, poor flexibility of optical/electrical service matching and high engineering realization complexity, realizes switching scale expansion and flexible optical/electrical service matching respectively by changing and combining the number of the photoelectric/electro-optical switching basic units, adapts to the access requirements of optical switching/electrical switching of different systems, and is convenient for modularization and productization design.
Description
Technical Field
The invention belongs to the technical field of satellite communication, and particularly relates to a distributed photoelectric hybrid switching structure.
Background
Space nodes of space-based information networks need to adapt to the requirements of different link types such as microwave and laser, different information carrying modes such as optical and electrical and information exchange with different granularities in the future.
In the existing photoelectric switching method, a ground network carries out backbone transmission through optical fibers, the switching method adopts electric control optical switching or electric switching, an optical switching structure adopts a single optical switch switching matrix or a wavelength switching array, an electric switching structure adopts a storage forwarding structure, and the switching structure and the method can not be simultaneously suitable for two data links of microwave and laser; adopt the mixed exchange structure of the photoelectricity of a stack formula among the space environment, light exchange and electric exchange are independent each other, realize the mixed exchange of photoelectricity through the photoelectric conversion interface between the two, light business and electric business carry out centralized processing respectively, this structure has following not enough: (1) exchange scale scalability is low: the optical switching and the electrical switching of the switching structure need to be redesigned when a new task is required after the switching scale and the optical-electrical conversion interface are determined at the beginning of the design, and the switching structure does not have the expandable capability. (2) The flexibility of the optical/electrical service ratio is poor: the optical/electrical service ratio of the switching structure is determined according to the number of service interfaces of optical switching and electrical switching, cannot be changed according to task requirements, and is poor in flexibility. (3) The engineering implementation complexity is high: the optical service and the electric service of the switching structure are processed in a centralized way, more calculation and processing resources are needed to be used during hardware design, and the complexity of engineering realization is increased.
Disclosure of Invention
The technical problem solved by the invention is as follows: the distributed photoelectric hybrid switching structure solves the problems of low expandability of the existing structure, poor flexibility of optical/electric service matching and high engineering implementation complexity, realizes switching scale expansion and flexible optical/electric service matching respectively by changing and combining the number of photoelectric/photoelectric switching basic units, adapts to the access requirements of optical switching/electric switching of different systems, and is convenient for modularization and product design.
The purpose of the invention is realized by the following technical scheme: a distributed opto-electric hybrid switching fabric comprising: the system comprises a front stage exchange unit, a middle stage exchange unit and a rear stage exchange unit; the front-stage exchange unit comprises k front-stage photoelectric exchange basic units and j front-stage photoelectric exchange basic units; the intermediate stage switching unit comprises an optical switching unit and an electric switching unit; the rear-stage exchange unit comprises k rear-stage electro-optical exchange basic units and j rear-stage photoelectric exchange basic units; the input of each front stage photoelectric exchange basic unit is an optical signal, the output of each front stage photoelectric exchange basic unit is an optical signal and an electric signal, and the front stage photoelectric exchange basic units are respectively connected to the optical exchange unit and the electric exchange unit of the middle stage exchange unit; each front-stage electro-optical switching basic unit inputs an electric signal and outputs an electric signal and an optical signal which are respectively connected to the electric switching unit and the optical switching unit of the middle-stage switching unit; the input and the output of the optical switching unit of the intermediate stage switching unit are optical signals, and are connected to each electro-optical switching basic unit and each photoelectric switching basic unit of the rear stage switching unit; the input and the output of the electric exchange unit of the intermediate stage exchange unit are electric signals and are connected to each electro-optical exchange basic unit and each photoelectric exchange basic unit of the rear stage exchange unit; the input of each post-stage electro-optical switching basic unit is an optical signal from the optical switching unit and an electric signal from the electric switching unit, and the output is an optical signal; the input of each rear stage photoelectric switching basic unit is an optical signal from the optical switching unit and an electric signal of the electric switching unit, and the output is an electric signal.
In the distributed optical-electrical hybrid switching structure, the preceding-stage optical-electrical switching basic unit includes an optical switching module, an optical-electrical conversion module, an optical-electrical adaptation module, and a first incoming line processing module; the optical signals pass through the optical switching module, so that a part of the optical signals are input to the optical switching unit, the other part of the optical signals pass through the photoelectric conversion module to form electric signals, the electric signals pass through the photoelectric adaptation module to form electric signals with uniform rate, and the electric signals with uniform rate are input to the electric switching unit through the first incoming line processing module.
In the distributed photoelectric hybrid switching structure, the preceding-stage photoelectric switching basic unit includes a second incoming line processing module, an electric switching module, and a photoelectric conversion module; the electrical signals are input to the electrical switching module through the second incoming line processing module, a part of the electrical signals are input to the electrical switching unit through the electrical switching module, the other part of the electrical signals form optical signals through the electro-optical conversion module, and the optical signals are input to the optical switching unit.
In the distributed photoelectric hybrid switching structure, the post-stage photoelectric switching basic unit comprises a first outgoing line processing module, a photoelectric adaptation module, a photoelectric conversion module and a photoelectric switching module; the electric signal from the electric exchange unit is input to the electro-optical adaptation module through the first outgoing line processing module, the electric signal is matched into an optical signal rate through the electro-optical adaptation module, an optical signal is formed through the electro-optical conversion module, and the optical signal is output through the optical exchange module; the optical signal from the optical switching unit is output through the optical switching module.
In the above-mentioned distributed photoelectric hybrid switching structure, the said back stage photoelectric switching basic unit includes photoelectric conversion module, electric switching module and the second processing module of being qualified for the next round of competitions; the optical signals from the optical switching unit form electrical signals through the photoelectric conversion module, the electrical signals are input to the second outgoing line processing module through the electric switching module, and the electrical signals are output through the second outgoing line processing module; the electric signal from the electric exchange unit is input into the electric exchange module and then output through the second outgoing line processing module.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts the photoelectric/electro-optical exchange basic units to realize the mutual conversion of the photoelectric/electric information, realizes the expansion of the photoelectric/electric exchange scale by increasing or reducing the number of the photoelectric/electro-optical exchange basic units at the front stage and the rear stage aiming at different task requirements, and can flexibly proportion the photoelectric/electric business by utilizing the combination of a plurality of photoelectric/electro-optical exchange basic units at the front stage and the rear stage;
(2) the invention respectively carries out the preprocessing distribution and the post-processing distribution of the photoelectric information at the front stage and the rear stage, the middle stage optical/electric exchange can realize the high throughput exchange, and simultaneously the front stage and the rear stage adapt to the access requirements of the optical exchange/electric exchange of different systems by arranging single or multiple system photoelectric/electric optical exchange basic units;
(3) the invention carries out three-stage division, reduces the complexity of hardware design, and simultaneously, the functions of the photoelectric/electro-optical exchange basic units adopted by the front stage and the rear stage and the functions of the optical exchange and electric exchange units adopted by the middle stage are relatively independent, thereby being convenient for modularization and product design.
Drawings
FIG. 1 is a block diagram of a distributed opto-electronic hybrid switching architecture of the present invention;
FIG. 2 is a block diagram of the basic unit of the front-stage photoelectric exchange of the present invention;
FIG. 3 is a block diagram of the basic unit composition of the preceding stage electro-optical switching of the present invention;
FIG. 4 is a block diagram of the basic unit of the back-stage electro-optical switching of the present invention;
FIG. 5 is a block diagram of the basic unit of the back-stage photoelectric exchange of the present invention;
fig. 6 is a block diagram of a 32x32 opto-electronic hybrid switching fabric implementation of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
fig. 1 is a block diagram of a distributed opto-electronic hybrid switching architecture of the present invention. As shown in fig. 1, the distributed optical-electrical hybrid switching fabric includes: the system comprises a front stage exchange unit, a middle stage exchange unit and a rear stage exchange unit; wherein the content of the first and second substances,
the front stage exchange unit comprises k front stage photoelectric exchange basic units and j front stage photoelectric exchange basic units;
the intermediate stage switching unit comprises an optical switching unit and an electric switching unit;
the rear-stage exchange unit comprises k rear-stage electro-optical exchange basic units and j rear-stage photoelectric exchange basic units;
the input of each front stage photoelectric exchange basic unit is an optical signal, the output of each front stage photoelectric exchange basic unit is an optical signal and an electric signal, and the front stage photoelectric exchange basic units are respectively connected to the optical exchange unit and the electric exchange unit of the middle stage exchange unit;
each front-stage electro-optical switching basic unit inputs an electric signal and outputs an electric signal and an optical signal which are respectively connected to the electric switching unit and the optical switching unit of the middle-stage switching unit;
the input and the output of the optical switching unit of the intermediate stage switching unit are optical signals, and are connected to each electro-optical switching basic unit and each photoelectric switching basic unit of the rear stage switching unit;
the input and the output of the electric exchange unit of the intermediate stage exchange unit are electric signals and are connected to each electro-optical exchange basic unit and each photoelectric exchange basic unit of the rear stage exchange unit;
the input of each post-stage electro-optical switching basic unit is an optical signal and an electric signal from the intermediate-stage switching unit, and the output is an optical signal;
the input of each rear stage photoelectric switching basic unit is the optical signal and the electric signal from the intermediate stage switching unit, and the output is the electric signal.
The working principle is as follows: the front stage photoelectric exchange basic unit exchanges optical signals needing to be subjected to electric processing to the photoelectric conversion port and converts the optical signals into electric signals, and then the electric signals enter the electric exchange unit of the middle stage exchange unit, and other optical signals enter the optical exchange unit of the middle stage exchange unit after being exchanged to the optical output port; the front stage electro-optical switching basic unit switches the electric signals to be transmitted through the optical channel to the electro-optical conversion port to be converted into optical signals, and then the optical signals enter the optical switching unit of the middle stage switching unit, and other electric signals enter the electric switching unit of the middle stage switching unit after being switched to the electric output port; the optical switching unit and the electric switching unit of the intermediate stage switching unit respectively and independently perform optical switching and electric switching processing on optical signals and electric signals, the optical switching unit switches the optical signals needing to be subjected to electric processing to corresponding ports of a rear stage optical-electric switching basic unit, other optical signals are switched to corresponding ports of the rear stage optical-electric switching basic unit, the electric switching unit switches the electric signals needing to be transmitted through an optical channel to the corresponding ports of the rear stage optical-electric switching basic unit, and other electric signals are switched to the corresponding ports of the rear stage optical-electric switching basic unit; the rear stage photoelectric switching basic unit outputs an electric signal after performing photoelectric switching processing on an input electric signal through photoelectric conversion, and outputs an optical signal after performing optical switching processing on the input electric signal through photoelectric conversion.
Specifically, as shown in fig. 1, the number of the front stage photoelectric switching basic units is k, the number of the rear stage photoelectric switching basic units is k, the number of optical ports of each front stage photoelectric switching basic unit is n, the number of optical ports of each rear stage photoelectric switching basic unit is n, the number of optical ports of each middle stage switching unit is nk, the number of front stage photoelectric switching basic units is j, the number of rear stage photoelectric switching basic units is j, the number of electrical ports of each front stage photoelectric switching basic unit is m, the number of optical ports of each rear stage photoelectric switching basic unit is m, and the number of electrical ports of each middle stage switching unit is mj.
Fig. 2 is a block diagram of the front stage photoelectric exchange basic unit of the present invention. As shown in fig. 2, the front stage photoelectric exchange basic unit includes an optical exchange module, a photoelectric conversion module, a photoelectric adaptation module, and a first incoming line processing module; wherein the content of the first and second substances,
the optical signal passes through the optical switching module, so that a part of the optical signal is input to the optical switching unit, the other part of the optical signal passes through the photoelectric conversion module to form an electric signal, the electric signal passes through the photoelectric adaptation module to form an electric signal with uniform rate, and the electric signal with uniform rate is input to the electric switching unit through the first incoming line processing module. It should be noted that the optical switching module can determine which optical signals can be input to the photoelectric conversion module. The first incoming line processing module can complete head checking and table look-up.
Fig. 3 is a block diagram of the basic unit composition of the preceding stage electro-optical exchange of the present invention. As shown in fig. 3, the preceding stage electro-optical switching base unit includes an incoming line processing module, an electrical switching module, and an electro-optical conversion module; wherein the content of the first and second substances,
the electrical signals are input to the electrical switching module through the second wire-in processing module, one part of the electrical signals are input to the electrical switching unit through the electrical switching module, the other part of the electrical signals form optical signals through the electro-optical conversion module, and the optical signals are input to the optical switching unit. It should be noted that the electrical switching module can determine which electrical signals can be input to the electrical-to-optical conversion module. The second incoming line processing module can complete the work of head checking and table look-up.
Fig. 4 is a block diagram of the basic unit of the post-stage electro-optical switching of the present invention. As shown in fig. 4, the latter stage electro-optical switching basic unit includes a first outgoing line processing module, an electro-optical adapting module, an electro-optical converting module, and an optical switching module; wherein the content of the first and second substances,
the electric signal from the electric exchange unit is input to the electro-optical adaptation module through the first outgoing line processing module, the electric signal is matched into an optical signal rate through the electro-optical adaptation module, an optical signal is formed through the electro-optical conversion module, and the optical signal is output through the optical exchange module; the optical signal from the optical switching unit is output through the optical switching module. It should be noted that the first outgoing line processing module completes cell synthesis and header verification generation.
Fig. 5 is a block diagram of the basic unit of the photoelectric exchange of the back stage of the invention. As shown in fig. 5, the rear stage photoelectric switching basic unit includes a photoelectric conversion module, an electric switching module, and a second outgoing line processing module; wherein the content of the first and second substances,
optical signals from the optical switching unit form electrical signals through the photoelectric conversion module, the electrical signals are input to the second outgoing line processing module through the optical switching module, and the electrical signals are output through the second outgoing line processing module; the electric signal from the electric exchange unit is input into the electric exchange module and then output through the second outgoing line processing module. It should be noted that the second outgoing line processing module completes cell synthesis and header verification generation.
Fig. 6 is a block diagram of an implementation of the 32x32 optical-electrical hybrid switch fabric of this embodiment. As shown in fig. 6, this embodiment illustrates a specific implementation manner of a distributed optical-electrical hybrid switch fabric and method by taking the implementation of switch scale 32 × 32 as an example, where 32 channels include 8 channels of optical signals (with a rate of 10Gbps) and 24 channels of electrical signals (with a highest rate of 1.25 Gbps).
The front-stage photoelectric switching basic unit inputs 2 optical signals, i.e. n is 2, outputs 2 optical signals and 1 electrical signal, inputs 4 electrical signals, i.e. m is 4, and outputs 4 electrical signals and 1 optical signal, thus the front-stage photoelectric switching basic unit needs 4 photoelectric switching basic units and 6 photoelectric switching basic units, i.e. k is 4, and j is 6. Correspondingly, the latter stage switching unit also requires 4 latter stage electro-optical switching base units and 6 latter stage opto-electrical switching base units. The input of the intermediate stage optical switching unit can be calculated to be 14 optical signals, that is, nk + j is 2x4+6 is 14, the input of the electrical switching unit includes 24 electrical signals output by the preceding stage electro-optical switching basic unit and electrical signals output by the optoelectronic switching basic unit, since the rate of the optical signals is 10Gbps, the rate of the optical signals needs to be matched to the electrical signals of 1.25Gbps, 1 optical signal is adapted to be 8 electrical signals, and therefore the input of the intermediate stage optical switching unit is 56 electrical signals, that is, jm + k is 6x4+4x8 is 56. A specific implementation block diagram is shown in fig. 6.
The implementation method comprises the following steps:
(1) before the optical/electrical service begins, the satellite-borne photoelectric hybrid switching equipment configures photoelectric/electro-optical switching basic units in front-stage and rear-stage switching units and optical switching units in middle-stage switching units according to service characteristics and requirements; here, taking 1-way optical port switch to electrical port and 1-way electrical port switch to optical port, and the rest of optical ports switch to optical ports, and electrical port switch to electrical port as an example, that is, port 1 switch to ports 9-16 (optical to electrical switch) and port 10 switch to port 2 (electrical to optical switch), the configuration requirements are as follows:
port 10 switches to port 2: the satellite-borne photoelectric hybrid switching equipment needs to switch a port 10 of a front-stage photoelectric switching basic unit to an optical port, corresponds to an input port 9 of a middle-stage optical switching unit, configures an optical switching matrix into the input port 9 to be switched to an output port 2, and configures the switching matrix into the output port 2 corresponding to a rear-stage photoelectric switching basic unit 1;
(2) after reaching the satellite-borne photoelectric hybrid switch, the optical/electric service enters a preceding stage switching unit, wherein the optical service enters a preceding stage photoelectric switching basic unit, and the electric service enters a preceding stage photoelectric switching basic unit;
(3) the pre-stage photoelectric switching basic unit carries out optical switching through an optical switching matrix according to configuration requirements, wherein a port 1 of the photoelectric switching basic unit 1 is output to a corresponding electric output port and is converted into a 10Gbps electric signal through a photoelectric conversion module, 8 paths of internal electric signals with the uniform rate of 1.25Gbps are obtained through rate adaptation, and each path of signal enters the intermediate-stage switching unit after being preprocessed through checking of an incoming line processing module, searching of a forwarding table and the like;
(4) the service entering the preceding stage electro-optical switching basic unit is adapted to the internal unified rate of 1.25Gbps by the incoming line processing module, and the incoming line processing module comprises a rate matching module, a serial-parallel conversion module and a head checking and table look-up module. According to the service requirement, wherein the electro-optical switching basic unit 1 has 1 path of electric signals to be switched to optical signals, the electric switching module switches the electric signals to an optical output port through table lookup, and converts the electric signals into optical signals through the electro-optical conversion module;
(5) the 8 optical signals and 31 electric signals output by the front stage exchange unit enter the optical exchange unit and the electric exchange unit of the middle stage exchange unit respectively for exchange:
the optical switching unit switches the input port 9 to the output port 2 through the optical switching matrix according to the configuration requirement;
the electric exchange unit forwards the input ports 1-8 to the output ports 33-40 according to the table look-up result of the forwarding table/routing table;
(6) the optical signal and the electric signal output by the intermediate stage switching unit enter the photoelectric switching basic unit and the photoelectric switching basic unit of the rear stage switching unit for switching:
an optical switching matrix in the back-stage electro-optical switching basic unit switches the input port 2 to the port 2 according to the configuration requirement;
the electric exchange unit in the back stage photoelectric exchange basic unit exchanges the input ports 33-40 to the output ports 9-16 through table look-up results and outgoing line processing.
The invention adopts the photoelectric/electro-optical exchange basic units to realize the mutual conversion of the photoelectric/electric information, realizes the expansion of the photoelectric/electric exchange scale by increasing or reducing the number of the photoelectric/electro-optical exchange basic units at the front stage and the rear stage aiming at different task requirements, and can flexibly proportion the photoelectric/electric business by utilizing the combination of a plurality of photoelectric/electro-optical exchange basic units at the front stage and the rear stage; the invention respectively carries out the preprocessing distribution and the post-processing distribution of the photoelectric information at the front stage and the rear stage, the middle stage optical/electric exchange can realize the high throughput exchange, and simultaneously the front stage and the rear stage adapt to the access requirements of the optical exchange/electric exchange of different systems by arranging single or multiple system photoelectric/electric optical exchange basic units; the invention carries out three-stage division, reduces the complexity of hardware design, and simultaneously, the functions of the photoelectric/electro-optical exchange basic units adopted by the front stage and the rear stage and the functions of the optical exchange and electric exchange units adopted by the middle stage are relatively independent, thereby being convenient for modularization and product design.
The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (1)
1. A distributed opto-electric hybrid switching fabric, comprising: the system comprises a front stage exchange unit, a middle stage exchange unit and a rear stage exchange unit; wherein the content of the first and second substances,
the front stage exchange unit comprises k front stage photoelectric exchange basic units and j front stage photoelectric exchange basic units;
the intermediate stage switching unit comprises an optical switching unit and an electric switching unit;
the rear-stage exchange unit comprises k rear-stage electro-optical exchange basic units and j rear-stage photoelectric exchange basic units;
the input of each front stage photoelectric exchange basic unit is an optical signal, the output of each front stage photoelectric exchange basic unit is an optical signal and an electric signal, and the front stage photoelectric exchange basic units are respectively connected to the optical exchange unit and the electric exchange unit of the middle stage exchange unit;
each front-stage electro-optical switching basic unit inputs an electric signal and outputs an electric signal and an optical signal which are respectively connected to the electric switching unit and the optical switching unit of the middle-stage switching unit;
the input and the output of the optical switching unit of the intermediate stage switching unit are optical signals, and are connected to each electro-optical switching basic unit and each photoelectric switching basic unit of the rear stage switching unit;
the input and the output of the electric exchange unit of the intermediate stage exchange unit are electric signals and are connected to each electro-optical exchange basic unit and each photoelectric exchange basic unit of the rear stage exchange unit;
the input of each post-stage electro-optical switching basic unit is an optical signal from the optical switching unit and an electric signal from the electric switching unit, and the output is an optical signal;
the input of each rear stage photoelectric switching basic unit is an optical signal from the optical switching unit and an electric signal of the electric switching unit, and the output is an electric signal; wherein the content of the first and second substances,
the front-stage photoelectric exchange basic unit comprises a light exchange module, a photoelectric conversion module, a photoelectric adaptation module and a first incoming line processing module; wherein the content of the first and second substances,
the optical signals pass through the optical switching module, so that a part of the optical signals are input to the optical switching unit, the other part of the optical signals pass through the photoelectric conversion module to form electric signals, the electric signals pass through the photoelectric adaptation module to form electric signals with uniform rate, and the electric signals with uniform rate pass through the first incoming line processing module and are input to the electric switching unit;
the front stage electro-optical switching basic unit comprises a second incoming line processing module, an electric switching module and an electro-optical conversion module; wherein the content of the first and second substances,
the electric signals are input into the electric exchange module through the second wire inlet processing module, one part of the electric signals are input into the electric exchange unit through the electric exchange module, the other part of the electric signals form optical signals through the electro-optical conversion module, and the optical signals are input into the optical exchange unit;
the back-stage electro-optical switching basic unit comprises a first outgoing line processing module, an electro-optical adapting module, an electro-optical conversion module and an optical switching module; wherein the content of the first and second substances,
the electric signal from the electric exchange unit is input to the electro-optical adaptation module through the first outgoing line processing module, the electric signal is matched into an optical signal rate through the electro-optical adaptation module, an optical signal is formed through the electro-optical conversion module, and the optical signal is output through the optical exchange module;
the optical signal from the optical switching unit is output through the optical switching module;
the rear-stage photoelectric exchange basic unit comprises a photoelectric conversion module, an electric exchange module and a second outgoing line processing module; wherein the content of the first and second substances,
optical signals from the optical switching unit form electrical signals through the photoelectric conversion module, the electrical signals are input to the second outgoing line processing module through the optical switching module, and the electrical signals are output through the second outgoing line processing module;
the electric signal from the electric exchange unit is input into the electric exchange module and then output through the second outgoing line processing module.
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| An Onboard Dispatching Algorithm for MSM Clos-network Switches;HU Yan-lang，ZHOU Quan，LI Jun，ZHANG Yi，CUI Tao，LIANG Wei;《SPACE ELECTRONIC TECHNOLOGY》;20151231(第1期);全文 * |
| Investigation and System Implementation of Flexible Bandwidth Switching for a Software-Defined Space Information Network;Bin Wu，Hongxi Yin，Anliang Liu，Chang Liu，Fangyuan Xing;《IEEE Photonics Journal》;20170630;第7卷(第3期);全文 * |
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