CN110430486A - A kind of boundary switching node based on integrated form hybrid optical switching network - Google Patents
A kind of boundary switching node based on integrated form hybrid optical switching network Download PDFInfo
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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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- 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
- H04Q11/0062—Network aspects
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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
- H04Q2011/0052—Interconnection of switches
- H04Q2011/0058—Crossbar; Matrix
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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
- H04Q11/0062—Network aspects
- H04Q2011/0084—Quality of service aspects
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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
- H04Q11/0062—Network aspects
- H04Q2011/0086—Network resource allocation, dimensioning or optimisation
Abstract
The invention discloses a kind of boundary switching nodes based on integrated form hybrid optical switching network, comprising: service identification module reaches the data traffic types of network for identification, and sends data to corresponding transmission submodule according to the type of service；Exchange transmission module, including optical cross connect transmission submodule OXC, optical packet switching transmission submodule OPS and electric packet-switched transmission submodule EPS；Multiplexing module, including control circuit, delay line, coupler, multiplexer are exported, optical packet switching transmission submodule and the electric packet-switched transmission submodule add drop multiplex are transmitted to the idle component of submodule to the optical cross connect.Switching node combines the advantage of optical circuit exchange (OCS), optical packet switching and electric packet switch, different types of service is realized on the basis of guaranteeing QoS of survice demand and shares the purpose of wavelength resource, to realize network resource usage maximization and QoS of survice support optimization.
Description
Technical field
The invention belongs to technical field of photo communication, specifically relate to a kind of boundary exchange based on integrated form hybrid optical switching network
Node.
Background technique
Under the double excitation that internet big data and optical communication network develop, people constantly propose the development of communication network
New requirement out.The very fast increase of IP operation amount, the capacity for improving backbone network become the task of top priority, therefore dense wave division multipurpose
(Dense Wavelength Division Multiplexing, DWDM) comes into being.Dense wave division multipurpose can allow transmission
The transmission that bandwidth reaches single fiber 50Tbps is horizontal, solves the problems, such as transmission bandwidth deficiency, but network node to information at
The requirement of reason efficiency is also being continuously improved, therefore information is optically transmitted, and it is current photoelectricity that conversion is carried out in a manner of electric
The prevailing model of network.And bandwidth limits the transmission with intrinsic properties affect information of electronic devices such as local power consumptions during being somebody's turn to do
With exchange, this become current photoelectricity network Development main bottleneck.In order to improve such phenomenon and can preferably play optics
The advantage of technology, takes full advantage of optical cross connect at node, the optical exchangers part such as light bifurcated multiplexing go to make up exchange and
Transmit unmatched defect.
For in optical network system, low energy consumption, high open and strong operability is the main feature of optical switched technology.
Already mature optics switching technology has very much, including optical wavelength switching technology (Optical Circuit
Switching, OCS), electric packet-switch technology (Electronic Packet Switching, EPS).Optical wavelength exchange energy is only
Internet resources to be enjoyed, the data traffic types high to bandwidth requirement are transmitted, low packet loss ratio and low delay are also its major advantage, but
Be it network resource utilization it is not high.Electric packet switch handles data packet one by one, reduces error rate, improves number
According to the reliability of transmission, using any scheduling mode, but need to complete photoelectric conversion, process energy consumption is larger.In order to more
The good advantage for playing these switching technologies, reduces their adverse effects to network structure, therefore hybrid switching network is met the tendency of
And it gives birth to.
The application for a patent for invention of Publication No. CN105141512A discloses a kind of support grouping/circuit hybrid switching network
Unified Network framework and control method, in the multiple field heterogeneous network being made of multiple packet switching networks and circuit-switched network
One concentration network controller of middle setting, carries out the router-level topology, scheduling of resource and flow control of the whole network, and pass through external interface
Receive the customization of heterogeneous networks control and management rule；Each for concentrating network controller and the packet switching network
Router be connected, obtain the neighbor topology information and traffic engineering database information of the router, for carry out router-level topology,
Scheduling of resource and flow control, and router-level topology result and control management information are handed down to the router, complete routing table
Configuration and router keyholed back plate；Each circuit-switched network is regarded as a virtual router, and a virtual flow-line is set
Device agency is used as its entity, and the concentration network controller is connected with each virtual router agency, virtual by these
Router agency obtain its respectively corresponding to circuit-switched network inside and outside abstract topology information and traffic engineering number
Virtual routing tables and control are managed by each virtual router agency according to library information and the concentration network controller
Reason information is issued to each circuit-switched network fringe node, and triggers connection control and the net of the circuit-switched network
Network management.
However, existing hybrid switching network only includes cross exchange module and electric PSM packet switching module, resource utilization
It is low.Therefore, how realizing the resource-sharing of different business, improving resource utilization is this field urgent problem to be solved.
Summary of the invention
It is a kind of based on integrated form hybrid optical switching network the purpose of the present invention is in view of the drawbacks of the prior art, providing
Boundary switching node.In view of the continuous upgrading of the network equipment and the needs of saving economic cost, the present invention is in existing light
It joined optical packet switching submodule on the basis of cross exchange module and electric PSM packet switching module.Realize different service class
Type shares the purpose of wavelength resource, and bandwidth is realized preferably effectively distribution, Internet resources is shared, optimizes the transfer structure of node
Internet resources and higher QoS, the cost of significant decrease overall switch architecture are preferably utilized to realize.The present invention
Integrated mixed optical network boundary switching node meet future network optimization developing direction, can preferably excavate optical-fiber network
Potentiality provide more good information service.
In order to achieve the goal above, the invention adopts the following technical scheme:
A kind of boundary switching node based on integrated form hybrid optical switching network, comprising:
Service identification module reaches the data traffic types of network for identification, and sends number according to the type of service
Submodule is transmitted according to corresponding；
Exchange transmission module, including optical cross connect transmission submodule OXC, optical packet switching transmission submodule OPS and electricity
Packet-switched transmission submodule EPS；
Multiplexing module, including control circuit, delay line, coupler, multiplexer are exported, the optical packet switching is transmitted into son
Module and the electric packet-switched transmission submodule add drop multiplex transmit the idle component of submodule to the optical cross connect.
Further, the type of service includes GST- " Circuit Service ", and SM/RT- " real time business " and SM/BE- " divide
Group business "；The optical cross connect transmission submodule is used for transmission GST service class；The optical packet switching transmission submodule is used
Class is serviced in transmission SM/RT；The electricity packet-switched transmission submodule is used for transmission SM/BE service class.
Further, the integrated form hybrid optical switching network includes flowing in or out under optical fiber, business upload and business
Load port；The background traffic for flowing in or out optical fiber and being used for transmission from or go to other nodes of network；The business
It uploads and service downloading port is for changing the local stream for flowing in or out integrated form hybrid optical switching network boundary switching node
Amount.
Further, the service identification module includes logic control circuit, FDL delay line, demultiplexer, light beam splitting
Device, electric shunt and high-speed optical switch, low speed photoswitch.
Further, the exchange transmission module includes control switched circuit, high low speed array of photoswitch, electronic packets friendship
It changes planes and electric buffer.
Further, the beam splitter isolates sub-fraction power and enters the logic control circuit completion photoelectricity
The conversion of signal and the reading of signal message carry out switch control according to the signal message that decoding obtains.
Further, the optical cross connect transmission submodule is low speed optical switch matrix, the optical packet switching transmission
Submodule is high-speed optical switch matrix, and the electricity packet-switched transmission submodule is electronic packets interchanger.
Further, for background service, the data packet for belonging to GST or SM/RT service will be sent directly to OXC or OPS；
SM/BE data packet will pass through input block before being sent to EPS；For local service, if the data packet of input belongs to
GST, they would be buffered and be encapsulated into GST burst, are subsequently sent to OXC；If the data packet reached belongs to SM/RT, they
The input block of limited size will be sent to；The arrival data packet for belonging to SM/BE service will be sent to and SM/BE background
The shared input block of flow.
Further, the different application of different service classes has different priority；The video and data source two of GST service
A queue, two queues are used to buffer and the GST that input is assembled into each wavelength happen suddenly；Class is serviced for SM/RT, it is raw
At two grouping sources of voice and control message；Class is serviced for SM/BE, defines two sources: video and data, two enough
Big queue is used for two source types from background traffic and local flow, and video queue priority is high.
Further, the output end of the low speed optical switch matrix passes through delay line switch-in coupler, the coupler point
Submodule OXC, optical packet switching transmission submodule OPS and electric EPS pairs of submodule of packet-switched transmission are not transmitted into interconnection
The Same Wavelength resource for the different business that should be transmitted carries out multiplexing transmission, and the different wave length that the multiplexer exports coupler is believed
Number multiplexing output.
It is proposed by the present invention to be based on the optical circuit exchange of hybrid integrated formula hybrid optical switching network boundary switching node set
(OCS), the advantages of optical packet switching (OPS) and electronic packets exchange (EPS) transmits three kinds of services on identical wavelength resource
Grade.Input flow rate is mapped to three service classes by the architecture applying electronic buffer area and multiple queues.Give queue
The detailed realization of dispatching technique, assembly algorithm and contention settlement mechanism, preferably has adjusted the network architecture；Integrated form of the present invention is mixed
The design of light combination exchange network boundary switching node improves network capacity, realizes better resource utilization and higher
QoS.In addition, it significantly reduces overall switch system knot by the way that maximum volume of services is mapped to GST and SM/BE service class
The cost of structure, both services are all by the switch processes of relative maturity.
Detailed description of the invention
Fig. 1 is the embodiment of the present invention based on integrated form hybrid optical switching network boundary switching node schematic diagram；
Fig. 2 is the service identification module structural schematic diagram of the embodiment of the present invention.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
Embodiment one
As shown in Figure 1, the present embodiment proposes a kind of boundary switching node based on integrated form hybrid optical switching network, packet
It includes:
Service identification module 2 reaches the data traffic types of network for identification, and sends number according to the type of service
Submodule is transmitted according to corresponding.
Integrated form hybrid optical switching network of the present invention boundary switching node, is generally connected directly, positioned at network with terminal
Marginal portion meets the needs of edge network environment, the critical positions in the network architecture.With integrated form hybrid optical switching network
What the input terminal of the design of boundary switching node was directly connected to is service identification module.The module mainly by high-speed optical switch and
Electric treatment equipment composition, plays the role of identification business transport-type.
Service identification module is by ON-OFF control circuit, FDL delay line, demultiplexer, beam splitter, electric shunt and height
Fast photoswitch, low speed photoswitch composition.Exchange transmission module mainly has control switched circuit, high low speed array of photoswitch, electronics
Packet switch and electric buffer composition.
As shown in Fig. 2, service identification module is by beam splitter 11, FDL12, logic control circuit 13, electric shunt 14, low
Fast photoswitch 15, high-speed optical switch 16 and high-speed optical switch 17 are constituted.Signal isolator can replace the effect of electric shunt, patrol
It collects control circuit and mainly needs photoelectric conversion, the technical supports such as FPGA, light function beam splitter generally uses organic polymer materials
PMMA uses the y branch waveguide structure beam splitter based on total internal reflection.
The working principle of service identification module is each wavelength of demultiplexer output, one isolated by beam splitter
Fraction power can enter logic control circuit part, and photoelectric signal transformation at this time, the analysis of information, which mainly passes through, patrols
Volume control circuit is completed, and then low speed light opens the light 15 closures the data packet that data by analysis are encapsulated if GST, and high-speed light is opened the light
16 and high-speed light open the light 17 openings；If the data packet of SM/RT encapsulation, then high-speed light is opened the light 16 closures, and low speed light opens the light 15 and high
Fast light opens the light 17 openings；If the data packet of SM/BE encapsulation, then high-speed light is opened the light 17 closures, low speed light open the light 15 and high-speed light open
Light 16 is opened.
Transmission module is exchanged, including submodule, light are transmitted in optical cross connect 4 (optical cross-connect, OXC)
Packet-switched transmission submodule 5 (Optical Packet Switching, OPS) and electric packet-switched transmission submodule 6
(EPS), the optical cross connect transmission submodule 4 is used to carry out transmission exchange to optical circuit exchange business, and the light packet is handed over
It changes transmission submodule 5 to be used to swap transmission to optical packet switching business, the electricity packet-switched transmission submodule 6 is used for pair
Electric packet switching service swaps transmission.
The type of service of Switching Module prevailing transmission includes GST- " Circuit Service ", SM/RT- " real time business " and SM/
BE- " Packet Service ".Optical cross connect transmits submodule 4 and transmits light GST service class；Optical packet switching is transmitted submodule 5 and is transmitted
Light SM/RT services class；Electric packet-switched transmission submodule 6 transmits light SM/BE and services class.It is main that submodule is transmitted in optical cross connect
Optical wavelength transmission exchanges business, and optical packet switching transmits submodule prevailing transmission optical packet switching business, electric packet-switched transmission
Submodule prevailing transmission electricity packet switching service.The invention mainly comprises tri- kinds of transmission of GST, SM/RT and SM/BE to service class
Type.Class is serviced if light GST, OXC submodule is just passed to and swaps transmission；Class is serviced if light SM/RT, is just passed to
OPS submodule；Class is serviced if light SM/BE, just passes to EPS submodule.
The present invention is based on a kind of boundary switching nodes of integrated form hybrid optical switching network, by optical cross connect, light packet
The exchange submodule such as exchange and electric packet switch is merged, target be while meeting multiple terminal business need,
To the business classification processing of interchanger transmission, Internet resources are shared according to time-interleaved mode, improve channel utilization, are saved
Network energy consumption merges the advantages of different exchanged forms, adjusts network to support different service quality (QoS) demand.
The present invention joined light packet in optical cross connect and electric packet switch and hand on the basis of existing optical-fiber network
It changes.Optical cross connect, optical packet switching, electric three exchange submodules of packet switch are mixed.Terminal traffic is divided into
Three kinds of different mode transmissions, the optical cross connect transmission type of service high to delay and reliability requirement；Optical packet switching transmission
To the type of service of latency sensitive；The electric packet-switched transmission type of service not high to requirement of real-time.The present invention collects with
The design difference of accepted way of doing sth hybrid optical switching network boundary switching node is exchanged at it using optical cross connect, optical packet switching and electricity
Subgroup exchanges three kinds of exchanged forms, allows optical packet switching and electronic packets to exchange two kinds of transmission data and is multiplexed into light friendship
Pitch the transmission idle component in connection business.This solves channel and only transmits caused by a kind of data type that utilization rate is not high to ask
Topic, substantially increases the multiplexing capacity of transmission line.
The present invention mainly uses the optical switch matrix of two kinds of different rates, and low speed optical switch matrix is exchanged for optical wavelength,
High-speed optical switch matrix is used for optical packet switching.Electric packet switch submodule 6 is electronic packets interchanger.
Jejune optics random access device reduces by the electric buffer of high-speed optical switch configuration as buffer memory device competing
Strive caused packet loss；The present invention increases a fibre delay line FDL in each OXC output port, it plays reduction transmission number
The effect of interruption rate when according to grouping, the length of every section of fibre delay line are set as the maximum length phase being grouped with individual data
Together, additional increased delay can guarantee that the data grouping packet loss transmitted is minimum；The present invention is in the defeated of optical packet switching
Enter end, output end outfit wavelength shifter and data packet services are exchanged to either end according to the network protocol and requirement on upper layer
On any wavelength of mouth.The present invention, by data grouping add drop multiplex to idle optical path, improves net in light exchange output end
The utilization rate of network reduces network resources waste.
The present invention will also upload and download local service other than completing to exchange transmission background service.Therefore integrated form is mixed
Light combination exchange network boundary switching node allows to support the soft exchange of wavelength routed networks and being electrically accessed together for IP data grouping
Access.Exchange network is uploaded and is formed with service downloading port by flowing in or out optical fiber and business.It is described to flow in or out optical fiber
It is used for transmission from or goes to the background traffic of other nodes of network.The business upload and service downloading port for changing
Flow in or out the local flow of the planned network of integrated form hybrid optical switching network boundary switching node.
For background service, packet type is detected by service identification module.Belong to the data packet of GST or SM/RT service
It will be sent directly to OXC or OPS.SM/BE data packet will pass through input block before being sent to EPS；For local service,
The data packet of arrival is mapped to different service classes, and is added in network by aggregation port and multiple input blocks.
If the data packet of input belongs to GST, they would be buffered and be encapsulated into GST burst, be subsequently sent to OXC.If reached
Data packet belongs to SM/RT, and potential data-bag lost is reduced in the input block for being sent to limited size by they.Buffering
The size in area depends on their delay tolerance.The arrival data packet for belonging to SM/BE service will be sent to and SM/BE background stream
The shared input block of amount.Since requirement of real-time is low, buffer size setting is enough to big, to guarantee buffer overflow not
It will lead to packet loss.To reduce the packet loss of data grouping as far as possible on the basis of maximizing wavelength resource and utilizing.
The present invention is for any wavelength in appropriate output optical fibre, GST burst allocation highest priority, can always without
The forwarding of damage ground.When new GST, which happens suddenly, to arrive, the detection signal from OXC will notify OPS and EPS to stop sending on wavelength
New SM/RT and SM/BE data packet.In order to guarantee that the SM/RT data packet of current transmission is completed in the transmission of this wavelength, GST is prominent
Hair must pass through fixed fibre delay line FDL before transmitting.The length of FDL1 is arranged according to maximum SM/RT packet size.
Therefore, FDL guarantees that the non-preferential formula scheduling of GST is serviced better than SM/RT.But SM/RT data package size is much smaller than typical
SM/BE data package size.If FDL is less than its residue transmission time, the SM/BE grouping transmitted may be happened suddenly by GST
It interrupts.Therefore, GST service has the priority serviced prior to SM/BE.The present invention guarantees that SM/RT takes using detection signal
Business is serviced prior to SM/BE.When new SM/RT grouping reaches and does not have available free wavelength in output optical fibre appropriate
When, the detection signal from OPS will notify EPS is stopped on selected wavelength to send new SM/BE grouping.Meanwhile in the wave
The SM/BE grouping transmitted in length is interrupted and loses.This ensure that SM/BE grouping has lowest priority, and can be by
GST burst and SM/RT grouping are interrupted, and SM/BE service will not influence the performance of GST or SM/RT service；SM/RT service is unable to shadow
Ring the performance of GST service.
The present invention defines different priority for the different application of different service classes.Class, background stream are serviced for GST
Contention is not present between amount and local flow.We define two queues of video and data source of GST service.Two queues are used for
It buffers and the GST that input is assembled into each wavelength happens suddenly, pay the utmost attention to the video team with relatively high QoS demand
Column.Class is serviced for SM/RT, considers two grouping sources for generating voice and control message.Voice real-time requirement with higher,
And control message is more sensitive to packet loss.Using two-stage static priority scheduling technology, override considers background traffic.Every
In kind discharge pattern, voice packet is paid the utmost attention to.There are two the buffer areas of limited size to be used for local flow for each output optical fibre, it
Size depend on their delay tolerance.Class is serviced for SM/BE, covers low real-time requirement application program, we define
Two sources: video and data are both assumed to be used by low quality demand application program.Video has relatively more than data
High QoS demand.Two sufficiently large queues are used for two source types from background traffic and local flow, pay the utmost attention to regard
Frequency queue.
Export Multiplexing module, including control circuit 10, FDL delay line 9, coupler 7, multiplexer 8, by light packet connect with
And the idle component that electronic packets exchange add drop multiplex is transmitted to optical cross connect.
It exports Multiplexing module and realizes different transport-types, share the effect of Internet resources.Integrated form hybrid optical switching network
Multiplexer and demultiplexer can use film filtering and circulating technology to complete in the design of boundary switching node；High-speed light is opened
It is realized using LiNbO3 photoswitch pass；Low speed photoswitch is realized using mems optical switch；Photo-coupler is encapsulated using SMD；
Random access memory can replace electric buffer.
It follows that the design of integrated form hybrid optical switching network boundary switching node of the invention combines OXC, OPS
The advantages of with tri- kinds of exchange transmission submodules of EPS, three kinds of service classes are transmitted on identical wavelength resource, improve Internet resources
Utilization rate and the higher QoS of acquisition.In addition, it is significantly reduced total by the way that service type is mapped to GST, SM/RT and SM/BE
The cost of body exchanger system structure provides a kind of achievable network structure of economy, accelerates the step of information exchange transmission
It cuts down.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of boundary switching node based on integrated form hybrid optical switching network characterized by comprising
Service identification module, reaches the data traffic types of network for identification, and is sent data to according to the type of service
Corresponding transmission submodule；
Exchange transmission module, including optical cross connect transmission submodule OXC, optical packet switching transmission submodule OPS and electricity grouping
Exchange transmission submodule EPS；
Multiplexing module, including control circuit, delay line, coupler, multiplexer are exported, the optical packet switching is transmitted into submodule
And the electric packet-switched transmission submodule add drop multiplex transmits the idle component of submodule to the optical cross connect.
2. boundary switching node according to claim 1, which is characterized in that the type of service includes GST- " circuit industry
Business ", SM/RT- " real time business " and SM/BE- " Packet Service "；The optical cross connect transmission submodule is used for transmission GST
Service class；The optical packet switching transmission submodule is used for transmission SM/RT service class；The electricity packet-switched transmission submodule is used
Class is serviced in transmission SM/BE.
3. boundary switching node according to claim 2, which is characterized in that the integrated form hybrid optical switching network includes
Flow in or out optical fiber, business upload and service downloading port；It is described flow in or out optical fiber and be used for transmission come from or go to net
The background traffic of other nodes of network；The business uploads and service downloading port mixes for changing integrated form is flowed in or out
The local flow of optical switching network boundary switching node.
4. boundary switching node according to claim 1, which is characterized in that the service identification module includes logic control
Circuit, FDL delay line, demultiplexer, beam splitter, electric shunt and high-speed optical switch, low speed photoswitch.
5. boundary switching node according to claim 1, which is characterized in that the exchange transmission module includes control exchange
Circuit, high low speed array of photoswitch, electronic packets interchanger and electric buffer.
6. boundary switching node according to claim 4, which is characterized in that the beam splitter isolates sub-fraction function
Rate enters the logic control circuit and completes the conversion of photosignal and the reading of signal message, the signal obtained according to decoding
Information carries out switch control.
7. boundary switching node according to claim 1, which is characterized in that the optical cross connect transmission submodule is low
Fast optical switch matrix, the optical packet switching transmission submodule is high-speed optical switch matrix, the electricity packet-switched transmission submodule
Block is electronic packets interchanger.
8. boundary switching node according to claim 3, which is characterized in that for background service, belong to GST or SM/RT
The data packet of service will be sent directly to OXC or OPS；SM/BE data packet will pass through input block before being sent to EPS；
For local service, if the data packet of input belongs to GST, they would be buffered and be encapsulated into GST burst, be subsequently sent to
OXC；If the data packet reached belongs to SM/RT, they will be sent to the input block of limited size；Belong to SM/BE clothes
The arrival data packet of business will be sent to the input block shared with SM/BE background traffic.
9. boundary switching node according to claim 8, which is characterized in that the different application of difference service class has difference
Priority；Two queues of video and data source of GST service, two queues are assembled into each for buffering and by input
The GST of wavelength happens suddenly；Class is serviced for SM/RT, generates two grouping sources of voice and control message；Class is serviced for SM/BE,
Two sources: video and data are defined, two sufficiently large queues are used for the two provenance classes from background traffic and local flow
Type, video queue priority are high.
10. boundary switching node according to claim 7, which is characterized in that the output end of the low speed optical switch matrix
By delay line switch-in coupler, interconnection is transmitted submodule OXC respectively by the coupler, optical packet switching transmits submodule
The Same Wavelength resource of the different business of block OPS transmission corresponding with electricity packet-switched transmission submodule EPS carries out multiplexing transmission, institute
The different wave length signal multiplexing that multiplexer exports coupler is stated to export.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113472685A (en) * | 2021-05-27 | 2021-10-01 | 北京邮电大学 | Photoelectric hybrid switching method and device based on QoS flow classification in data center |
| WO2022040880A1 (en) * | 2020-08-24 | 2022-03-03 | Alibaba Group Holding Limited | Heterogeneous optical network |
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