TW201611534A - High-speed dynamic smart Full-optical switch device - Google Patents

Abstract

The present invention provides a high-speed dynamic smart Full-optical switch device that can solve the biggest problem of buffer and wavelength contention in Full-optical switching, so that the wavelength can be switched bidirectionally in real-time to the designated transmission fiber, thereby achieving a novel structure of contentionless, high stability, low cost, full-duplex Full-optical switching performance without wavelength limitation and directionality. Mainly, it uses the management and control mechanism of MPLS (Multiprotocol Label Switching) routing network to the network packet classification scheduling, which is converted into the light direction-change operation of spatial phase modulation SLM (spatial light modulator) of a rogrammable-control WSS (Wavelength selective switch). Thus, the optical wave signals of input fibers with plural different light sources are switched to plural corresponding program-controlled output fiber ports, thereby achieving the purpose of dynamic optical switching.

Description

High-speed dynamic intelligent all-optical switching device

The invention relates to an optical switching device, in particular to an all-optical switching device suitable for various network structures, so as to realize interconnection of a ring network, a grid network and a hybrid network, and a simple and fast dynamic optical switching mode. At the same time, the optical fibers of a plurality of input optical switching devices can be dynamically switched to a designated output optical fiber through program control, and a high-speed dynamic all-optical switching performance device with high stability, low cost, high-speed dynamic multi-channel wavelength and all-optical switching performance can be achieved.

The traditional optical switching devices use the WDM optical network system architecture of the ITU-T standard as the optical switching spindle. In order to match the fixed-wavelength fixed optical fiber transmission, multiple components and path conversion are required to meet the requirements. If the WDM-specific wavelength conversion and selection components are met, the optical switching network management system architecture controls the coordination between the relevant components and the reserved optical delay, making the entire optical switching network management system more complex and increasing the switching wavelength. Conversion time and overall deployment cost.

It needs to have expensive equipment and high-order optical switching network management system technology, and has patent-related problems, which can only be controlled by a few vendors. In view of the above-mentioned conventional technology, the inventors of the present invention have made improvements and innovations in terms of production costs, technical thresholds and patents. After years of painstaking research, they finally succeeded in developing a high-speed dynamic intelligent all-optical switching device. .

Due to the rise of cloud concepts, consumer applications such as social networking, web albums, and audio and video, to VoIP, video conferencing, and even server virtualization, and huge amounts of data. The final connection of application services such as processing and management must rely on high-bandwidth technology to achieve QoS (Quality of Service) in the future. The invention can further expand the application for making the end-to-end point transmission interface fiber-optic, and solve the problem of time delay and wavelength drift caused by excessive path conversion in the high-speed connection of the existing optical switching device, such as electricity/ Light and light/electric conversion, source wavelength limitation, wavelength selection, etc.

The invention mainly provides a high-speed dynamic intelligent all-optical switching device, which can instantaneously and bidirectionally switch the wavelength energy to a specified transmission fiber in a simple and rapid manner, and achieve wavelength-free, fiber-reusable wavelength-free limitation, non-directionality and no wavelength conflict. (Contentionless) is the best all-optical switching target. Compared with the traditional optical switch, the present invention does not need to add any relevant components required for the conventional optical WDM wavelength, and has low deployment cost and high optical switching efficiency, and is most suitable for multi-point switching. The endpoint-to-endpoint bidirectional optical switching provides an important invention for providing all-optical network applications for endpoint-to-endpoint services. It is most suitable for short-distance high-density multiple links in metropolitan area networks to achieve end-to-endpoint fast optical switching architecture.

The invention provides a high-speed dynamic intelligent all-optical switching device, and the biggest difference from the existing market products is that a low-cost 10G_SFP+ (Enhanced small form-factor pluggable) optical transceiver module is used as the transmission of the intelligent electro-optic conversion control device. The signal light wave is switched to the designated transmission fiber 即时 in real time, achieving the all-optical switching purpose of fast switching from the endpoint to the endpoint.

The main architecture of the present invention includes a provider edge PE (Provider Edge) router of a multi-protocol label switching MPLS (Multiprotocol Label Switching) routing network, a user edge CE (Customer edge) router pooling area, a smart optical switching control device, and a wavelength. Select switch WSS and Multi-Core-Fiber as the architecture of the integrated and connected components:

1. Multi-core fiber MCF, which mainly removes multiple fibers to cover the fiber end, so that they can be closely arranged to accommodate multiple incident wavelengths, but the wavelengths and wavelengths are still independent. This purpose is mainly used for wavelength selectors. The WSS incident end enables simultaneous introduction of all different incident wavelengths into the WSS without the use of any optical passive components such as WDM and AWG (as shown in Figure 1);

2. Wavelength selection switch WSS, with spatial phase modulator SLM, accepts intelligent optical switching control device to control light wave switching task, has programmable control, uses light reflection principle, multi-channel incident light wave from MCF(P) fiber C The group switches to the fiber corresponding to the MCF (A) fiber A group or the MCF (F) fiber B group, and vice versa. Multi-wavelength switching can be performed simultaneously, depending on the location of the incident wavelength, independent of the wavelength of the lightwave (as shown in Figure 2). Figure 2 shows the optical path. 1) The a wavelength of the MCF (P) fiber C1 is incident: t1 time is switched to MCF (B) fiber B1, t2 time is switched to MCF (A) fiber A1. 2).MCF(P) B-wave incidence of fiber C3: switch to MCF (A) fiber A3 at t1 time, switch to MCF (B) fiber B1 at t2 time. 3). Multi-wavelength incident of MCF(P) fiber at t0 time, grating and light mapping The component performs beam splitting processing, and the SLM uses light reflection to switch the optical wave from the MCF (P) fiber group C to the MCF (A) fiber group A or the MCF (B) fiber group B, and can simultaneously perform multi-wavelength switching.

3. Multi-Protocol Label Switching The provider edge PE router of the MPLS routing network, based on the MPLS protocol, separates routing from data forwarding, and labels specify the path of a packet through the network. Since the QoS of the QoS service classifies the forwarded packets, the congestion of the network packet of the node (the packet data forwarded by the PE router to the CE router) can be solved. The port forwards the network packet to the PE-CE link, which greatly improves the service quality of the network bandwidth resource.

4. Intelligent optical switching control device, mainly to replace the photoelectric conversion interface of the traditional PE router link export, and control interface with WSS optical steering control, built-in N 10G_SFP+ optical transceiver module, ready to send PE router The N destination network packet signals to the CE router are subjected to E/O (Electronic-to-Optical) electro-optical conversion through the corresponding 10G_SFP+ optical transceiver module for introducing signal light waves into the WSS for optical switching, and the CE router The uploaded signal is used for O/E (Optical-to-Electronic) photoelectric conversion to be imported into the PE router (as shown in Figure 3). This device uses the multi-protocol label to switch the path selection mechanism of MPLS routing network 1 and the quality of service QoS decision. The packet priority function hierarchically arranges the packets forwarded to the CE router, so that the completed network packet is imported into the WSS for optical switching, and the signal light waves of the N different destinations are simultaneously exchanged to the program in a programmable manner. Dynamic optical switching is achieved in the fiber of the corresponding CE router (as shown in Figure 4). The program is a smart optical switching control device. After reading the network packet data and analyzing the path from the PE router, the control interface transmits the command to the WSS (D), and the spatial phase modulator SLM is optically exchanged. The network packet signal is converted into signal light wave by electro-optical light, enters the WSS for optical switching, and reaches the destination CE router; and according to the path data of the PE router, it can be dynamically switched to different optical fibers at different times to achieve the purpose of real-time dynamic optical switching;

5. The user edge CE router pooling area, the client network packet upload (Upstream) uses another WSS (U), and all CE routers that comply with the WSS (U) multi-core fiber MCF number are divided into one pool area, WSS ( U) alternately exchange the MCF lightwave signals of each pooling area into the MCF fiber of the WSS (U) uploading PE in a multiplexed manner. The CE routers in the aggregation area set the same data upload time and transmission time length to achieve the benefit of collective data uploading to the intelligent optical switching control device.

The combination of WSS (D) and WSS (U) achieves full-duplex purpose, and the WSS (U) used for client network packet uploading is performed by the M client network packet signal of the CE router pooling area via MCF. Into the WSS (U) for light wave steering switching, import the corresponding M output fibers, upload to the intelligent optical switching control device for photoelectric conversion, and then enter the MPLS routing network via the edge router PE router (as shown in Figure 5) Show), this can save the traditional schedule and upload time required to upload M client network packets sequentially. In the future, you can copy more CE router collection areas, and take multiple CE router network packets at the same time to collectively Upload to MPLS mode. For example, when the data of one CE router is uploaded in a traditional manner, the present invention can simultaneously upload M CE router data, so the time interval for uploading each client network packet is much smaller than the traditional uploading time. In this way, different user collection areas are uploaded in a fixed time interval, and for the collection area that is not uploaded by uploading, the signal is temporarily stored in the buffer of each CE router, since the upload time and the transmission time length have already been set. And the WSS is also set synchronously, so there is no need to be controlled by the intelligent optical switching control device, which can reduce the complexity and cost of the entire optical switching device, and save a lot of processing time.

1‧‧‧MPLS routing network

2‧‧‧Supplier Edge PE Router

3‧‧‧User Edge CE Router A Zone

4‧‧‧User Edge CE Router Collection Area B

5‧‧‧Smart optical switching control device

6‧‧‧Wavelength selector WSS(D)

7‧‧‧Wavelength selector WSS(U)

8‧‧‧MCF(Pt)

9‧‧‧MCF(Ar)

10‧‧‧MCF(Br)

11‧‧‧MCF(Pr)

12‧‧‧MCF(At)

13‧‧‧MCF(Bt)

Figure 1 Schematic diagram of multi-core fiber MCF of MCF, WSS and smart optical switching control device; Figure 2 Schematic diagram of wavelength selective switch WSS of MCF, WSS and intelligent optical switching control device; Figure 3 MCF, WSS and smart Schematic diagram of intelligent optical switching control device of optical switching control device; Figure 4: Intelligent optical switching control device of MCF, WSS and intelligent optical switching control device - schematic diagram of transmitting data of PE router; Figure 5 MCF, WSS and smart type Intelligent optical switching control device of optical switching control device - schematic diagram of uploading data of CE router; schematic diagram of high-speed dynamic intelligent all-optical switching device of FIG. 6A; Figure 6B is a schematic diagram of the high-speed dynamic intelligent all-optical switching device t1 time PE network packet downlink; the 6C high-speed dynamic intelligent all-optical switching device t2 time PE network packet downlink transmission; 6D high-speed dynamic intelligent full Optical switching device t1 time A area CE network packet uploading schematic; Figure 6E high speed dynamic intelligent all-optical switching device t1 + Δt time B area CE network packet uploading schematic.

Referring to FIG. 6A, the high-speed dynamic intelligent all-optical switching device of the present invention mainly comprises: 1. a multi-protocol label switching technology MPLS routing network 1, 2. a provider edge router PE 2, 3. a CE router pooling area A 3, CE router collection B area 4, 4. intelligent optical switching control device 5, 5. wavelength selection switch WSS (D) 6, WSS (U) 7, 6. multi-core fiber optic PE transmitter MCF (MCF ( Pt)) 8, CE (a) receiving end MCF (MCF (Ar)) 9, CE (b) receiving end MCF (MCF (Br)) 10, PE receiving end MCF (MCF (Pr)) 11, CE (a) transmitting end MCF (MCF (At)) 12, CE (b) transmitting end MCF (MCF (Bt)) 13.

The multi-protocol label switching MPLS routing network 1 path selection mechanism and the quality of service QoS determine the packet priority function, and the network packet that is hierarchically arranged by the forwarded packet is performed by the provider edge router PE router 2 ( As shown in Figure 6A).

Referring to FIG. 6B to FIG. 6C, the intelligent optical switching control device 5 reads the network packet forwarding signal data data executed by the PE router 2, and then transmits the command to the WSS (D) 6 through the WSS control interface to make the spatial phase thereof. The modulator SLM performs the N-channel signal light wave transmission and exchange operation to enable the N-channel network packet signal light wave to be transmitted at a time and simultaneously introduces the program-controlled N-channel output fiber 埠; the program is (1). The type optical switching control device 5 reads the data packet forwarding signal data data executed by the PE router 2, and (2) transmits the command to the WSS (D) 6 through the WSS control interface to make the space. The phase modulator SLM performs the exchange operation between the N-channel signal light wave input and output, (3) the network packet signal is converted into the signal light wave by electro-optical light, and (4) the multi-core core fiber PE transmitting end MCF (MCF(Pt)) 8 is imported into the wavelength selector WSS (D) 6 for optical wave exchange processing, and (5) after the "t1" time, the three-way network packet signal light waves (the number of signal light wave groups in the present embodiment) are exchanged by WSS. The two signal light waves are transmitted to the CE router through the CE (a) receiving end MCF (MCF (Ar)) 9 fiber 埠, and the signal wave of the A and 3 signals is passed through the CE (b) receiving end MCF (MCF (Br)). 10 fiber 埠 is introduced into the CE router to collect the B area 4 for transmission signal processing; (6) after the "t2" time, the 4 channels of the network packet signal light wave are exchanged by the WSS, and each of the 2 channels of the network packet signal light wave is exchanged to The CE router pools Area A 3 and CE Router Pool B Area 4.

The client network packet upload uses another WSS(U)7, and the input MCF is alternately switched to the output MCF according to the fixed time Δt. Referring to FIG. 6D, the CE route collects the network packet signals of the three client routers in the A area 3, and imports the wavelength selector WSS via the CE(a) transmitting end MCF (MCF(At)) 12 at the "t1" time ( U)7 performs optical wave switching processing, and is transmitted by the PE receiving end MCF (MCF(Pr)) 11 to the intelligent optical switching control device 5 for photoelectric conversion, and then transmitted to the MPLS 1 via the edge router PE 2 (at this time, the CE router is assembled. The signal data of Area B 4 is temporarily stored in each CE buffer. Please refer to Figure 6E. At t1+△t time, WSS(U)7 is switched to the four client router network packets of the exchange CE router and the B area 4. The CE (b) transmitting end MCF (MCF (Bt)) 13 is introduced to the wavelength selector WSS (U) 7, and is transmitted from the PE transmitting end MCF (MCF (Pt)) 11 to the intelligent optical switching control device 5. After photoelectric conversion, it is transmitted to MPLS 1 via PE router 2.

The above four conditions are combined into a high-speed dynamic multi-wavelength reusable intelligent all-optical switching device, and the smart-type optical switching control device 5 performs the QoS hierarchically arranged network packet forwarding by the provider edge router PE router 2. At the same time, the user network is divided into different CE router aggregation blocks, and the user network packets of the fixed collection block are collectively uploaded at a fixed time. Complete two-way transmission, achieving the best energy-saving network full-duplex all-optical switching target without wavelength limitation, non-directionality and no wavelength conflict.

The improved speed dynamic intelligent all-optical switching device of the invention has the following advantages when compared with the traditional metro-type all-optical switching device:

1. At the same time, the signal light waves of different light sources are incident on the wavelength selective switch WSS through the MCF, and switched to the corresponding output fiber 程式 of the program control to achieve the best energy saving without wavelength limitation, no directionality and no wavelength conflict. Network full-duplex all-optical switching target.

2. Using MPLS QoS to implement the packet control mechanism for packet traffic scheduling, QoS classifies network packets, so that network packets at the same time will not have address overlap, so SFP+ The optical transceiver of the optical transceiver module transmits wavelengths, and there will be no wavelength conflict generated by the client receiving.

3. Do not use the DWDM wavelength source specified by ITU-T, use the SFP+ optical transceiver module products that have been stabilized by 10G non-designated wavelength transmission in the existing market, as the transmission optical wave of the intelligent optical switching control device, due to WSS only It is responsible for diverting the wavelength of the incident signal light into the pre-planned transmission fiber 埠, so it has the advantage of low-cost light source and high stability without wavelength limitation regardless of the wavelength of the incident signal light wave.

4. The PE router network packet transmission mode: the multi-column network packet of the hierarchical scheduling is switched between the non-fixed optical wavelength and the non-fixed optical fiber multi-column network packet signal light wave at the same time.

5. CE router network packet uploading method: the M client network packet signals of the CE router pooling area are converted into signal light waves by the optical transceiver module, and the light wave steering is performed by the MCF incident to the uploaded WSS (U). Switching processing, importing M pre-planned fiber optic ports, uploading them to the intelligent optical switching control device for photoelectric conversion, and then entering the MPLS routing network via the edge router PE router, which is uploaded in turn by different user pools according to fixed time intervals. ,Correct If the uploading area is not in turn, the signal is temporarily stored in the buffer of each CE router. Since the uploading time and the length of the transmission time have already been set, and the WSS is also set synchronously, there is no need for smart optical switching. The control device controls the complexity and cost of the entire optical switching device and saves a lot of processing time. .

6. Using the "buffer" and MPLS QoS of the router to determine the packet path and priority characteristics, to solve the biggest problem of buffer and wavelength conflict in all-optical switching.

The detailed description of the present invention is intended to be illustrative of a preferred embodiment of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

To sum up, this case is not only innovative in terms of technical thinking, but also has many of the above-mentioned functions that are not in the traditional methods of the past. It has fully complied with the statutory invention patent requirements of novelty and progressiveness, and applied for it according to law. Approved this invention patent application, in order to invent invention, to the sense of virtue.

1‧‧‧MPLS routing network

2‧‧‧Supplier Edge PE Router

3‧‧‧User Edge CE Router A Zone

4‧‧‧User Edge CE Router Collection Area B

5‧‧‧Smart optical switching control device

6‧‧‧Wavelength selector WSS(D)

7‧‧‧Wavelength selector WSS(U)

Claims (8)

A high-speed dynamic intelligent all-optical switching device, comprising a supplier edge router PE, as an outbound and ingress device connecting an MPLS routing network; and a plurality of CE routers, the CE routers being aggregated into a plurality of CE router pooling areas, each CE The CE routers in the router pooling area upload network packets at the same time. The CE routers are in a multiplexed manner, and the network packets are uploaded in turn to an upload wavelength selection switch WSS (U) through the upload wavelength. Selecting a switch WSS (U) switch to the provider edge router PE; a smart optical switch control device, the photoelectric conversion interface for communicating with the CE routers on the provider edge router PE, having a WSS control interface, Controlling the optical switching action of one of the downstream wavelength selection switches WSS(D), so that the downlink network packet can reach the corresponding CE router; the downlink wavelength selection switch WSS(D) has a connection The input MCF of the supplier edge router PE and the output MCF interface connecting the collection areas of the CE routers, and a programmable spatial phase modulator SLM, accept the smart type Controlling the switching control device to dynamically perform optical switching work, exchanging network packets from the provider edge router PE to corresponding CE routers; the uploading wavelength selection switch WSS(U) having multiple connection to the CE routers The input MCF of the aggregation area and an output MCF interface of the connection provider edge router PE, and a spatial phase modulator SLM, alternately switch the input MCF to the output MCF according to a fixed time and multiplex mode. The high-speed dynamic intelligent all-optical switching device according to claim 1, wherein the smart optical switching control device has an interface for reading and inputting data of a PE router network packet, and a control interface for controlling WSS optical steering, and a built-in N 10G_SFP+ optical transceiver module for routing PE The network packet is sent to the N destinations to derive signals for E/O electro-optical conversion, and is transmitted to the WSS for optical switching. The high-speed dynamic intelligent all-optical switching device according to claim 1, wherein the high-speed dynamic intelligent all-optical switching device utilizes a multi-protocol label switching MPLS routing network 1 path selection mechanism and a quality of service QoS to determine a packet priority function. The packets forwarded by the PE router are hierarchically arranged, so that the completed network packet performs the function of multi-wavelength simultaneous switching by controlling the WSS, and simultaneously transmits the signal light waves of the network packets of the N destinations to different presets. In the fiber of the CE router, the purpose of optical switching is achieved. The high-speed dynamic intelligent all-optical switching device according to claim 1, wherein the provider-side edge router PE router packet downlinking system classifies the multi-column network packets in a hierarchical manner, and corresponds to a plurality of non-fixed lights at the same time. Wavelength and non-fixed fiber 埠 pass down. The high-speed dynamic intelligent all-optical switching device according to claim 1, wherein the CE router uploading system converts M client network packet signals of the CE router collection area into optical signals by the optical transceiver module into signal light waves. The optical wave steering switching process is performed by the MCF incident to the uploaded WSS (U), and the M output optical fibers are introduced, uploaded to the intelligent electro-optic conversion control device for photoelectric conversion, and then enter the MPLS routing network via the edge router PE router, and the collection area is In the multiplex mode, the network packets are uploaded to WSS (U) in turn. The high-speed dynamic intelligent all-optical switching device according to claim 1, wherein the optical transceiver module of the smart optical switching control device comprises an SFP+ optical transceiver module with no wavelength limitation and 10G transmission, and includes other rates. And technical optical transceiver modules, such as XFP Transceivers, X2 Transceivers, XENPAK Transceivers, etc. The high-speed dynamic intelligent all-optical switching device according to claim 1, wherein the provider-side edge router PE is not limited to using MPLS technology, and can use any OSI layer 2 switching technology to convert and control WSS (D) simultaneously. Optical exchange of paths. The high-speed dynamic intelligent all-optical switching device of claim 1, wherein the CE routers are switches, ONUs, or hosts.