CN113595644A - Optical transmission device and optical transmission system - Google Patents
Optical transmission device and optical transmission system Download PDFInfo
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- CN113595644A CN113595644A CN202110681597.0A CN202110681597A CN113595644A CN 113595644 A CN113595644 A CN 113595644A CN 202110681597 A CN202110681597 A CN 202110681597A CN 113595644 A CN113595644 A CN 113595644A
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- H—ELECTRICITY
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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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
- H04Q11/0062—Network aspects
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Abstract
The embodiment of the application provides an optical transmission device and an optical transmission system, which comprise an optical path selection device and a device panel, wherein the optical path selection device supports a flexible grid; the panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device. The device panel of the optical transmission device in the embodiment of the present application performs panel port area division toward the port function and the risk level, and connects the port of the optical selection device to the port area corresponding to the port function according to the port performance, which is beneficial to improving the performance and the security of the optical transmission device, and is also beneficial to realizing a flat networking through the optical transmission device in the embodiment of the present application.
Description
Technical Field
The embodiment of the application relates to the technical field of optical transmission, in particular to optical transmission equipment and an optical transmission system.
Background
With the development of information technology, the bandwidth requirement of interconnection is rapidly increased, and data interconnection between DC (data center) parks is usually realized by using optical transmission technology. Specifically, the optical transmission technology refers to a technology for transmitting optical signals between optical transmission devices, however, the conventional optical transmission devices still use an optical path selector supporting a fixed grid, which has many limitations and cannot flexibly perform networking according to requirements.
Disclosure of Invention
The embodiment of the application provides optical transmission equipment to solve the problem that bandwidth cannot be flexibly provided according to requirements. Correspondingly, the embodiment of the application also provides an optical transmission system, which is used for ensuring the application of the optical transmission equipment.
In order to solve the above problem, an embodiment of the present application discloses an optical transmission apparatus, including an optical path selection device and an apparatus panel that support a flexible grid; the panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device.
Optionally, the port regions include a common port region, a through interconnect port region, and local upper and lower port regions; the port function is associated with the wavelength involved, the risk level is associated with the number of ports; the port function of the common port area is all wavelengths related to the dimension, the port function of the through interconnection port area is all wavelengths related to the through among different dimensions, and the port function of the upper port area and the lower port area is all wavelengths related to the up and down in the dimension.
Optionally, when an optical protection device is built in the optical transmission device, the common port area is divided into a main common port area and a spare common port area, and the main common port area and the spare common port area are isolated at the device panel.
Optionally, the main common port area and the spare common port area are divided into two sides of the device panel.
Optionally, the optical transmission device is provided with a wire arrangement groove, and the panel port on the device panel is arranged with optical fibers through the wire arrangement groove, so that the wiring paths of the optical fibers of the panel port are not crossed.
Optionally, the line arrangement grooves include a first line arrangement groove and a second line arrangement groove, and the first line arrangement groove and the second line arrangement groove are arranged on two sides of the equipment panel; the public port of the public port area is respectively provided with optical fibers towards two sides by taking the middle of the first wire arranging groove as a boundary; and the through interconnection port and the local upper and lower ports are respectively provided with optical fibers towards two sides by taking the middle of the second wire arranging groove as a boundary.
Optionally, the optical path selecting device includes a plurality of optical path selecting devices, and the port performance of the port of each optical path selecting device increases or decreases with an increasing trend of the port serial number; and sequencing and mapping the port serial number of the port of the optical path selection device to the panel port serial number of the panel port of the equipment panel according to the port performance, and connecting the port of the optical path selector to the panel port of the equipment panel corresponding to the sequenced and mapped port, so that the port performance of the panel port is increased or decreased in a trend along with the increment of the panel port serial number.
Optionally, the optical path selecting device includes a first optical path selecting device and a second optical path selecting device; connecting the port of the first optical path selection device to the panel port with the even panel port number of the equipment panel, and connecting the port of the second optical path selection device to the panel port with the odd panel port number of the equipment panel; or, the port of the second optical path selection device is connected to the panel port with the even panel port number of the equipment panel, and the port of the first optical path selection device is connected to the panel port with the odd panel port number of the equipment panel.
Optionally, the optical path selection device is a wavelength selective switch WSS.
Optionally, a corresponding visual identifier is provided on the port area, and the visual identifier includes at least one of a color identifier, a text identifier, a symbol identifier, and a background graphic.
The embodiment of the application also discloses an optical transmission system, which comprises at least two optical transmission devices, wherein each optical transmission device comprises an optical path selection device supporting the flexible grid and a device panel; the panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device; and the optical transmission equipment realizes data interconnection through panel ports of the port area.
Optionally, the port regions include a common port region, a through interconnect port region, and local upper and lower port regions; the port function of the common port area of the optical transmission equipment is all wavelengths related to the optical transmission equipment, the port function of the through interconnection port area is all wavelengths related to the through between the optical transmission equipment, and the port function of the local upper and lower port areas is the wavelengths related to the inside of the optical transmission equipment; the optical transmission devices are connected through the through interconnection ports of the through interconnection port areas, the optical transmission devices are connected with the electrical layer devices through the local upper and lower ports of the local upper and lower port areas, and the optical transmission devices are connected with the optical amplification devices through the common ports of the common port areas.
Compared with the prior art, the embodiment of the application has the following advantages:
the optical transmission device of the embodiment of the application comprises an optical path selection device and a device panel, wherein the optical path selection device supports a flexible grid, a panel port on the device panel is divided into corresponding port areas according to port functions, and a port of the optical path selection device is connected to a panel port of the corresponding port area according to the port performance of the port. The device panel of the optical transmission device in the embodiment of the present application performs panel port area division toward the port function and the risk level, and connects the port of the optical selection device to the port area corresponding to the port function according to the port performance, which is beneficial to improving the performance and the security of the optical transmission device, and is also beneficial to realizing a flat networking through the optical transmission device in the embodiment of the present application.
Drawings
FIG. 1 is a schematic diagram of the optical path and insertion loss values of a ROADM device through link;
FIG. 2 is a schematic block diagram of an embodiment of an optical transmission apparatus of the present application;
FIG. 3 is a schematic diagram of a port layout of one aspect of the present application;
FIG. 4 is a schematic diagram of a layout of a device panel with built-in photo-protection devices according to the present application;
FIG. 5 is a schematic view of an apparatus panel layout of the present application;
FIG. 6 is a schematic diagram of one light routing scheme of the present application;
fig. 7 is an optical path diagram and an insertion loss diagram of a through link of an optical transmission apparatus according to the present application;
FIG. 8 is a schematic diagram of the ordering relationship between the ports of the panel and the ports of the internal WSS of an optical transmission apparatus of the present application;
fig. 9 is a block diagram of an optical transmission system according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
In particular implementations, as cloud computing evolves, the demand for bandwidth from the internet also increases rapidly. Between data center parks, a DWDM (dense wavelength division Multiplexing) optical transmission technology is generally adopted to provide large-capacity interconnection. The optical transmission technology can be decomposed into an optical layer and an electrical layer, wherein the optical layer comprises devices such as a wavelength combining and splitting device, an optical amplification device, an optical protection device and the like.
However, since the optical transmission technology is conventionally used only as a static channel to provide bandwidth for upper layer services, such as point-to-point interconnection, and an AWG (arrayed waveguide grating) supporting a fixed grid (Fixgrid) is used as a combiner/splitter, scheduling cannot be performed, because the optical path in the AWG is static and may even be passive, the width of the filter cannot be changed, combining/splitting from different ports cannot be configured, and once deployed, the upper limit of the baud rate of the electrical layer device is limited, which limits the update of the electrical layer device.
Therefore, a flexible grid (Flexgrid) technology oriented to a point-to-point link comes from work, and a WSS (wavelength selective switch) supporting the flexible grid is used as a combiner/splitter instead of an AWG, so that access of a signal at a baud rate of an electrical layer can be supported. Because the number of ports required by the Flexgrid multiplexer/demultiplexer is large (e.g. > 48 ports), the Flexgrid multiplexer/demultiplexer generally needs to use two WSSs, and then the two WSSs are spliced by the optical path synthesizing device and the optical path separating device, which brings about a negative effect that the insertion loss of the optical path is increased. The optical path combining device is a device for combining optical signals, and may include a Coupler (Coupler), and the optical path splitting device is a device for splitting optical signals, and may include a Splitter (Splitter).
In which, point-to-point refers to direct connection between devices, and the pass-through interconnection refers to connection of devices to one another through one device, and an optical signal does not fall to the ground through the intermediate device, for example, assuming that there are three devices a, b, and c, the optical signal passes from a to c, does not fall to the ground through b, and passes directly through c. As a specific example, the point-to-point may be: the A end electric layer device- > A end combined and wave-separated- > optical cable- > B end combined and wave-separated- > B port electric layer device, the penetrating can be: the device comprises an A-end electric layer device- > an A-end wave-splitting dimension- > an optical cable- > a B-end wave-splitting dimension 1- > a B-end wave-splitting dimension 2- > an optical cable- > a C-end wave-splitting dimension- > a C-port electric layer device.
Interconnection between the DCs at the present stage is mainly point-to-point interconnection, and a certain amount of through interconnection requirements exist, so that the flexible grid technology needs to be expanded from a point-to-point scene to support Mesh networking, and at this moment, two problems need to be mainly solved: 1) reduce because of the extra break-through insertion loss that coupler/optical splitter brought, promote transmission performance, 2) reduce the wiring interference problem between the panel port (e.g.60+ port) of a large amount of optical fibers of equipment panel play of optical transmission equipment, promote transmission reliability.
At present, an equipment panel of a conventional ROADM (reconfigurable optical add drop multiplexer) equipment adopts an MPO port for fiber outgoing, wherein the MPO port is generally 12 cores or 24 cores, and is oriented to full interconnection between dimensions when Mesh networking is performed. However, in a DC interconnection scenario, the feedthrough requirement does not relate to full interconnection, and generally only a small number of dimensions have feedthrough interconnection, for example, when a certain device is externally interconnected, there are N directions, each direction corresponds to 1 dimension, full interconnection means that all the N directions can be directly interconnected by feedthrough, and feedthrough is in some directions by feedthrough. If the MPO port is used, the following problems are brought about:
1) when going to the local up-down direction, the outgoing light of the electrical equipment line side of the electrical layer generally adopts a duplex LC port, more than 1 minute of MPO (maximum power output) jumping fibers are needed to be adopted for butting with the MPO port, and the expansion of the affected surface is brought when the MPO jumping fibers go wrong.
2) When the punch-through goes to other dimensions, due to the existence of the coupler and the optical splitter, the punch-through insertion loss is increased by about 8dB, and the adoption of MPO + fiber shuffle (optical flexible circuit assembly) insertion loss is increased by 2dB additionally, so that the transmission performance of the punch-through link is greatly influenced. Referring to fig. 1, an optical path diagram and an insertion loss value diagram of a through link of a ROADM device are shown, where PA represents a peramplifier (optical preamplifier) in one dimension, BA represents a booster amplifier (optical power amplifier) in another dimension, assuming that WSS is 32 ports, a maximum insertion loss value is 8.5dB, 2dB for MPO + fiber smooth interconnection insertion loss (insertion loss of about 0.5dB per MPO port), and 4dB for coupler/splitter insertion loss, and further, when optical layer OLP (optical line protection) protection exists in the link, the influence of insertion loss is further aggravated.
3) The punch-through interconnection reliability decreases, a total of 4 MPO ports are punched through at a time, and the probability of being affected by dust contamination or external force increases.
4) Different systems and standards exist in the MPO port, such as the number of cores and the sequence of the optical fibers, and additional adaptation may be required when dimensions of equipment of different manufacturers are butted.
Aiming at the characteristics of interconnection point-to-point main and feedthrough auxiliary among DC, the embodiment of the invention provides optical transmission equipment (Flexgrid multiplexer/demultiplexer) suitable for a flexible grid optical path selection device, which combines the insertion loss distribution rule of the optical path selection device to divide the panel port on the equipment panel into the port function and the panel area, and improves the feedthrough performance and the wiring reliability.
Referring to fig. 2, it is a schematic structural diagram of an embodiment of the optical transmission apparatus of the present application, which includes an optical path selection device supporting a flexible grid and an apparatus panel 201. The panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device.
The port performance may be referred to as an insertion loss value (insertion loss). Specifically, the insertion loss value refers to a loss of energy or gain when a device (optical path selecting device) is added to an apparatus (optical transmission apparatus).
Specifically, the optical path selection device supporting the flexible grid is a ROADM device, is used for realizing dynamic reconfigurable optical add/drop multiplexing, has a mesh structure, and can support functions of any uplink and downlink of any port wavelength, for example, WSS, which has a wide frequency band and low dispersion, and simultaneously supports an internal port-based wavelength definition (Colorless) characteristic, and adopts a free space optical switching technology, and has fewer uplink and downlink wave numbers and fewer uplink and downlink ports, but can support a higher dimension, has more integrated components, is complex to control, and can adjust the transmission frequency of an optical signal.
Wherein, the insertion loss value of every port in the optical path selection device is different to the port insertion loss distribution of optical path selection device possesses a characteristic: the insertion loss value is increased in trend with the increment of the port serial number of the port or the insertion loss value is decreased in trend with the increment of the port serial number of the port. It should be noted that the increasing is not strictly increasing or decreasing, but the overall trend is gradually increasing or gradually decreasing, mainly because the increase of the refraction angle of the grating in the optical path selection device increases the insertion loss value.
In specific implementation, ports of optical transmission equipment need to be connected with ports of electrical layer equipment and other optical transmission equipment through optical fibers so as to realize interconnection, but due to different insertion loss values of different ports and in view of the stricter requirement of dimension through interconnection ports on insertion loss values, panel ports on the optical transmission equipment are divided into port areas with corresponding port functions according to insertion loss values.
On the device panel of the optical transmission device in the embodiment of the present application, the device panel is divided into a plurality of port regions, each port region has a corresponding panel port, and the panel port of each port region has a corresponding port function, and a port of an optical path selection device in the optical transmission device is connected to the panel port of the corresponding port region according to an insertion loss value of the port, so that the panel port of each port region can realize the corresponding port function.
In an exemplary embodiment of the present application, the port regions include a common port region, a through interconnect port region, and local upper and lower port regions;
the port function of the common port area is all wavelengths related to the dimension, the port function of the through interconnection port area is all wavelengths related to the through among different dimensions, and the port function of the upper port area and the lower port area is all wavelengths related to the up and down in the dimension.
Specifically, the device panel of the optical transmission device according to the embodiment of the present application has at least three types of port types, which are respectively a common port, a through interconnection port, and a local upper port and a local lower port, that is, a panel port corresponding to a common port area, a through interconnection port area, and a local upper port and a local lower port area. Where a common port refers to all wavelengths of that dimension, a pass-through interconnect port refers to all wavelengths of pass-through between two dimensions, and local up and down ports refer to wavelengths up and down within that dimension.
From the risk impact side, it can be common port > pass-through interconnect port > local up and down ports, and port areas of different port functions can correspond to different risk levels. Therefore, the arrangement of different port areas can be optimized to visually reflect the functions or risk levels of the ports and isolate the interference between fiber outgoing and wiring of different ports to the maximum extent.
Referring to fig. 3, a schematic diagram of a port layout manner according to an embodiment of the present application includes layout schematic diagrams corresponding to three port layout manners a, b, and c, a device panel is generally divided into three port areas, namely a common port area and a pass-through interconnection port area, which respectively correspond to a high risk level, a medium risk level, and a low risk level, and the port areas with different risk levels may adopt different routing directions to reduce routing interference between different areas to the maximum extent. Of course, in practice, the port layout method is not limited to these three port layouts, for example, the port layout method may be divided into two port areas, which is not limited in this embodiment of the present application.
As an optional embodiment, corresponding visual marks are provided on the port areas, so that a user can distinguish the port areas with different port functions conveniently, and the visual marks comprise at least one of color marks, character marks, symbol marks and background graphics.
In particular, to facilitate a user in distinguishing between different port regions, corresponding visual indicia is provided in the vicinity of each port region.
As one example, symbolic identification may be employed as a visual identification of port regions, with the panel ports of each port region being independently named, e.g., common ports may be named IN1/OUT1, IN2/OUT2, etc., pass-through interconnect ports are named R1/T1, R2/T2, etc., local up-down ports are named M1/D1, M2/D2, etc. Besides the symbol marks, different port areas can be distinguished by adopting color marks (colors with larger contrast), character marks (public port inlets 1 and public port outlets 2), background patterns (patterns with different patterns) and the like.
In an exemplary embodiment of the present application, when an optical protection device is built in the optical transmission device, the common port area is divided into a main common port area and a spare common port area, and the main common port area and the spare common port area are isolated at the device panel.
In the embodiment of the present invention, an optical protection device with an optical protection related function, such as an olp (optical Line protection) device, may be built in the optical transmission device, where the transmitting end uses a 1 × 2 optical splitter and the receiving end uses a 2 × 1 optical switch. When the optical protection device is internally arranged in the optical transmission equipment, the public port area is divided into a main public port area and a standby public port area, so that the main public port area and the standby public port area are adopted to route completely different wiring paths in optical fiber wiring, and the problems that the traditional optical protection device is limited by the space of an equipment panel, the main port area and the standby port area are close together, the optical fibers need to be wired on the same side in the equipment cabinet, the optical fibers of the main port area and the standby port area are wired on the same wiring path, and the optical protection effect is poor are solved.
As an alternative example of the present application, the main common port region and the spare common port region are divided into two sides of the device panel, and the two sides may be an upper side, a lower side, or a left side and a right side, as long as a distance between the main common port region and the spare common port region can be as far as possible.
Referring to fig. 4, which is a schematic diagram of a panel layout manner of a built-in optical protection device according to the present application, a common port area is divided into a main common port area and a standby common port area, and the two port areas are disposed on left and right sides of an equipment panel to increase a distance between a main port and a standby port to the maximum extent. For example, the main common port is located on the left side of the panel, the standby common port is located on the right side of the panel, the main common port routes the wiring on the left side of the cabinet when the optical fiber is output for wiring, and the standby common port routes the wiring on the right side of the cabinet, so that the wiring path separation of the end-to-end main and standby ports can be realized. Of course, the positions of the active/standby ports in the embodiment of the present application are not limited to the positions shown in fig. 4, and are located on two sides of the center line of the device panel in principle.
In the embodiment of the present application, the pass-through interconnect ports of the optical transmission device may be implemented as MPO ports (i.e., each panel port may have multiple cores), which has the advantage of a smaller number of fibers to be interconnected, and in particular, the MPO ports may be implemented in a standard 12-core, 24-core mode or other specifications. Referring to fig. 5, which is a schematic diagram of a device panel layout according to the present application, it can be seen that the pass-through interconnect ports are in the form of MPO ports, which can reduce the number of required panel ports.
In an exemplary embodiment of the present application, the optical transmission device is provided with a wire management groove, and the panel ports on the device panel arrange the optical fibers through the wire management groove so that the wiring paths of the optical fibers of the panel ports do not intersect.
In the three types of ports of the device panel of the optical transmission device according to the embodiment of the present application, the common port < pass-through interconnection port < local upper and lower ports are generally ordered according to the number of ports. The common port and the through interconnection port are generally provided with a plurality of wavelengths, which are more sensitive to wiring interference, while the local upper and lower ports are generally provided with single waves, but the number of the ports is large, which easily affects the optical fiber wiring of other port areas. In addition, the through interconnect ports and the local upper and lower ports are continuously added with wiring over time if the wiring is in the principle of wiring as required. Therefore, there is always a problem that the optical fiber wiring between the three types of ports interferes with each other in space and time.
In order to solve the above problems, embodiments of the present application provide a concept of low-interference optical fiber wiring, and specifically, a specific wiring path is reserved and designed for each port region by fully utilizing routing directions of an equipment panel up, down, left, and right, so as to ensure that the wiring paths of optical fibers at the ports of the panel are not crossed.
In an exemplary embodiment of the application, the line arrangement grooves comprise a first line arrangement groove and a second line arrangement groove, and the first line arrangement groove and the second line arrangement groove are arranged on two sides of the equipment panel; the public port of the public port area is respectively provided with optical fibers towards two sides by taking the middle of the first wire arranging groove as a boundary; and the through interconnection port and the local upper and lower ports are respectively provided with optical fibers towards two sides by taking the middle of the second wire arranging groove as a boundary.
Referring to fig. 6, which is a schematic diagram of an optical fiber wiring scheme of a Flexgrid multiplexer/demultiplexer device according to the present invention, a cable management slot (i.e., a first cable management slot and a second cable management slot) is respectively disposed above and below the Flexgrid multiplexer/demultiplexer device, a common port and a through interconnection port are both wired from the upper cable management slot and are respectively wired to the left and right sides with the middle as a boundary, and local upper and lower ports are wired from the lower cable management slot and are also wired to the left and right sides with the middle as a boundary. Based on the optical fiber wiring scheme, the optical fiber wiring method has at least the following advantages: a. b, the main and standby public ports respectively distribute wires to two sides of the cabinet, no cross path exists, and no optical fiber can simultaneously influence the optical fibers of the main and standby ports.
In an exemplary embodiment of the present application, the optical path selecting device includes a plurality of optical path selecting devices, and an insertion loss value of a port of each optical path selecting device increases or decreases with an increasing trend of a port number;
and sequencing and mapping the port serial number of the port of the optical path selection device to the panel port serial number of the panel port of the equipment panel according to the insertion loss value of the port, and connecting the port of the optical path selector to the panel port of the equipment panel corresponding to the sequenced and mapped port, so that the insertion loss value of the panel port is increased or decreased in a trend along with the increment of the panel port serial number.
In a specific implementation, the port insertion loss distribution of the optical path selection device, such as the WSS, generally has a characteristic that the insertion loss increases or decreases with the increase of the port serial number, where the increase is not strictly speaking, but the overall trend is gradually increased, mainly resulting from the increase of the refraction angle of the grating in the module to increase the insertion loss value. By utilizing the characteristic, the WSS branch ports can be divided into two groups, namely a low-sequence-number port and a high-sequence-number port. The insertion loss values of the two groups of ports, i.e., the low-sequence-number port and the high-sequence-number port, are calibrated independently, generally, the insertion loss value of the low-sequence-number port is lower, and the insertion loss value of the high-sequence-number port is higher, but the insertion loss values of the low-sequence-number port and the high-sequence-number port may be reversed, that is, the insertion loss value of the low-sequence-number port is higher, and the insertion loss value of the high-sequence-number port is lower.
In the embodiment of the present application, in view of the stricter requirement of the punch-through interconnect port on the insertion loss value, the low sequence number port is used as the punch-through interconnect port between the dimensions (corresponding to the punch-through interconnect region), and the high sequence number port is used as the local up-down port (corresponding to the local up-down region).
For example, for a 32-port WSS, the overall insertion loss specification value of each port is 8.5dB, and assuming that the first N ports are low-sequence-number ports, the last 32-N ports are high-sequence-number ports, and the first 8 ports in the industry can reach the level of 6.5dB insertion loss specification value. Referring to fig. 7, using a low-sequence-number port for through interconnection, assuming that each WSS is reduced by 2dB, and 2 WSSs are reduced by 4dB altogether, and if the MPO insertion loss is 2dB and the LC insertion loss is 0.5dB, it can be further reduced by 1.5dB, and the end-to-end through interconnection insertion loss can be reduced by about 5.5dB
In an exemplary embodiment of the present application, the optical path selection device includes a first optical path selection device and a second optical path selection device; connecting the port of the first optical path selection device to the panel port with the even panel port number of the equipment panel, and connecting the port of the second optical path selection device to the panel port with the odd panel port number of the equipment panel; or, the port of the second optical path selection device is connected to the panel port with the even panel port number of the equipment panel, and the port of the first optical path selection device is connected to the panel port with the odd panel port number of the equipment panel.
In a specific implementation, since the insertion loss value of a single WSS increases in a trend with the increment of the port number, when 2 or more WSSs are combined together, the WSSs can be arranged and mapped according to the same rule, so that the port insertion loss of the whole device increases or decreases in a trend with the increment of the port number of the panel.
In the embodiment of the application, a basis can be provided for the area division design of the panel ports based on the port sorting, and the basis is mainly embodied in two aspects of the number of the port areas and the number of the ports in each port area. Assuming that a single WSS can divide X regions from the viewpoint of the insertion loss index, and each region has Y1 to YX ports, Z WSSs are grouped and sorted to also divide X regions, and each region has Z X Y1 to Z X YX ports.
Referring to fig. 8, which is a schematic diagram of an ordering mapping between a WSS and a panel port in the present application, as shown in fig. 8, a port combination manner of two WSSs includes but is not limited to the following cases:
1. ports with odd port numbers are arranged in a panel of the first WSS connecting equipment, and insertion loss increases or decreases in a trend along with the increasing of the port numbers of the panel;
2. ports with even port numbers are arranged in the second WSS connecting equipment panel, and the insertion loss increases or decreases in a trend along with the increasing of the port numbers of the panel;
3. the above 1 or 2 arrangements may optionally be implemented in the reach-through interconnect region or the local upper and lower regions, respectively.
For example, assuming that there are two wavelength selective switches WSS1 and WSS2, where WSS1 has port 11, port 12 and port 13, and WSS2 has port 21, port 22 and port 23, assuming that the insertion loss value of each wavelength selective switch increases with the increment of the port number, the corresponding ports on the device panel may be arranged in the manner of port 11, port 21, port 12, port 22, port 13 and port 23, so that the insertion loss value increases with the increment of the port number of the panel.
In the embodiment of the application, the panel port area of the equipment panel is divided facing to the function and risk level, a low insertion loss punch-through scheme is realized based on the WSS low-sequence-number port, and a specific sequencing mapping relation is provided between the WSS port sequence number and the panel port sequence number, so that the insertion loss value is increased or decreased in a trend along with the increasing of the panel port sequence number. It should be noted that the two optical path selection devices are used as an example, and in practice, the insertion loss value of the optical path selection device and the trend of the panel port may be increased or decreased in other manners.
The embodiment of the application provides that an optical transmission device (Flexgrid wavelength multiplexing/demultiplexing device) integrates the functions of a traditional ROADM device and a wavelength multiplexing/demultiplexing device, has a feedthrough function, has a local up-down function, and is suitable for interconnection between data centers.
Referring to fig. 9, a block diagram illustrating the structure of an embodiment of an optical transmission system of the present application includes at least two optical transmission devices including an optical path selection device and a device panel supporting a flexible grid; the panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device;
and the optical transmission equipment realizes data interconnection through panel ports of the port area.
The optical transmission device refers to a Flexgrid multiplexer/demultiplexer device, which includes an optical path selection device supporting a flexible grid, such as a wavelength selective switch WSS.
In the embodiment of the application, the optical transmission devices are connected with the electrical layer device or connected with other optical transmission devices in a penetrating way through the port areas with different port functions.
In an exemplary embodiment of the present application, the port regions include a common port region, a through interconnect port region, and local upper and lower port regions; the port function of the common port area of the optical transmission equipment is all wavelengths related to the optical transmission equipment, the port function of the through interconnection port area is all wavelengths related to the through between the optical transmission equipment, and the port function of the local upper and lower port areas is the wavelengths related to the inside of the optical transmission equipment;
the optical transmission devices are connected through the through interconnection ports of the through interconnection port areas, the optical transmission devices are connected with the electrical layer devices through the local upper and lower ports of the local upper and lower port areas, and the optical transmission devices are connected with the optical amplification devices through the common ports of the common port areas.
The optical transmission device, namely the Flexgrid multiplexer/demultiplexer device, is mainly characterized in that networking is flattened, additional multiplexer/demultiplexer units are not needed locally up and down, the line direction can be reached after one-time WSS filtering, and the point-to-point large bandwidth interconnection requirement is fully met; compared with the traditional multiplexing and demultiplexing equipment, the Flexgrid equipment provided by the embodiment of the application has the capability of flexible bandwidth configuration and supports the access and the passing-through of electric layer equipment signals with any baud rate.
In summary, the embodiment of the application provides FlexGrid multiplexing and demultiplexing equipment, which divides the port areas of a panel towards functions and risk levels, realizes a low-insertion-loss punch-through scheme based on a WSS low-sequence port, has a specific sequencing mapping relation between the WSS port sequence number and the port sequence number of the panel, and in addition, reserves and designs a specific wiring path for each port area by fully utilizing the wiring directions of the upper part, the lower part, the left part and the right part of the panel of the equipment so as to prevent wiring crosstalk. Furthermore, Mesh networking of the FlexGrid multiplexer/demultiplexer device is utilized, the flexible bandwidth configuration capacity is achieved, and networking flattening capacity is achieved, so that an optical transmission system formed by the optical transmission device based on the embodiment of the application is higher in design expansibility. The ROADM networking system has the networking flattening capability because the traditional ROADM networking is scheduled through the WSS, and the specific port is connected with the wavelength multiplexing and demultiplexing unit for local up and down, so that two layers are needed.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The foregoing detailed description is directed to an optical transmission device and an optical transmission system provided in the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the descriptions of the foregoing examples are only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (12)
1. An optical transmission apparatus comprising an optical path selection device supporting a flexible grid and an apparatus panel;
the panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device.
2. The optical transmission device of claim 1, wherein the port regions include a common port region, a through interconnect port region, and local upper and lower port regions;
the port function of the common port area is all wavelengths related to the dimension, the port function of the through interconnection port area is all wavelengths related to the through among different dimensions, and the port function of the upper port area and the lower port area is all wavelengths related to the up and down in the dimension.
3. The optical transmission device according to claim 1, wherein the common port region is divided into a main common port region and a spare common port region when an optical protection device is built in the optical transmission device, the main common port region and the spare common port region being isolated at the device panel.
4. The light transport device of claim 3 wherein the primary common port area and the backup common port area are divided to both sides of the device panel.
5. The optical transmission apparatus according to claim 1, wherein the optical transmission apparatus is provided with a line management groove through which the optical fibers are arranged by the panel ports on the apparatus panel so that the wiring paths of the optical fibers of the panel ports do not intersect.
6. The optical transmission device according to claim 5, wherein the line management grooves include a first line management groove and a second line management groove, the first line management groove and the second line management groove being provided on both sides of the device panel;
the public port of the public port area is respectively provided with optical fibers towards two sides by taking the middle of the first wire arranging groove as a boundary;
and the through interconnection port and the local upper and lower ports are respectively provided with optical fibers towards two sides by taking the middle of the second wire arranging groove as a boundary.
7. The optical transmission apparatus according to claim 1, wherein the optical path selection device includes a plurality of optical path selection devices, and the port performance of the port of each optical path selection device increases or decreases with increasing trend of the port number;
and sequencing and mapping the port serial number of the port of the optical path selection device to the panel port serial number of the panel port of the equipment panel according to the port performance, and connecting the port of the optical path selector to the panel port of the equipment panel corresponding to the sequenced and mapped port, so that the port performance of the panel port is increased or decreased in a trend along with the increment of the panel port serial number.
8. The optical transmission apparatus according to claim 7, wherein the optical path selection device includes a first optical path selection device and a second optical path selection device;
connecting the port of the first optical path selection device to the panel port with the even panel port number of the equipment panel, and connecting the port of the second optical path selection device to the panel port with the odd panel port number of the equipment panel; or,
and connecting the port of the second optical path selection device to the panel port with the even panel port number of the equipment panel, and connecting the port of the first optical path selection device to the panel port with the odd panel port number of the equipment panel.
9. The optical transmission apparatus according to claim 1, wherein the optical path selection device is a wavelength selective switch WSS.
10. The light transmission device of claim 1, wherein a corresponding visual indicia is provided on the port area, the visual indicia comprising at least one of a color indicia, a text indicia, a symbol indicia, and a background graphic.
11. An optical transmission system comprising at least two optical transmission devices including an optical path selection device supporting a flexible grid and a device panel; the panel ports on the equipment panel are divided into corresponding port areas according to port functions and risk levels, and the ports of the optical path selection device are connected to the corresponding panel ports of the port areas according to the port performance of the optical path selection device;
and the optical transmission devices realize data interconnection through panel ports of the port area.
12. The optical transmission system of claim 11, wherein said port regions include a common port region, a through interconnect port region, and local upper and lower port regions; the port function of the common port area of the optical transmission equipment is all wavelengths related to the optical transmission equipment, the port function of the through interconnection port area is all wavelengths related to the through between the optical transmission equipment, and the port function of the local upper and lower port areas is the wavelengths related to the inside of the optical transmission equipment;
the optical transmission devices are connected through the through interconnection ports of the through interconnection port areas, the optical transmission devices are connected with the electrical layer devices through the local upper and lower ports of the local upper and lower port areas, and the optical transmission devices are connected with the optical amplification devices through the common ports of the common port areas.
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| CN114545562A (en) * | 2022-03-25 | 2022-05-27 | 阿里巴巴（中国）有限公司 | Optical fiber connection box, data processing method and computer storage medium |
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