TWI548238B - Internet video packet switching device with protection function - Google Patents

Description

Network video packet switching device with protection function

The invention relates to a packet switching device, in particular to a network video packet switching device with protection function.

The Optical Cross-Connect System (OXC) can be divided into two types according to the number of wavelengths to be handed over. One type is the Without per wavelength cross-connect. This type of handover machine can transfer single or multiple wavelengths. The wavelength signal, the other type is with a per wavelength cross-connect, which can only hand over a single wavelength signal. As shown in Fig. 1, the wavelength conversion of a single wavelength can be divided into two types according to the wavelength. One type is wavelength non-switchable (Without wavelength interchange), that is, all wavelengths are fixed, the wavelength is not converted, and the other is wavelength. With wavelength interchange, all wavelengths can be switched at will.

Non-single wavelength handover is also known as FXC (Fiber Cross-Connect). When the FXC is handed over, the multi-wavelength signal of the single-wavelength or dense wavelength-wavelength multiplexer (DWDM) in the fiber can be handed over without multiplexing the optical signal, so it is called a fiber-optic hand-over machine. The single-wavelength handover machine has DWDM multiplex/demultiplex function, the handover signal is a single wavelength, and the wavelength conversion mode of the wavelength convertible handover machine is currently O/E/O (optical interface/electric interface/optical interface) In this way, the price of such a handover machine is relatively high, but the use of the wavelength is not convertible and flexible, there is no problem of Blocking.

OXC is a next-generation optical communication routing switch used for multi-channel data routing and line scheduling generated by DWDM. Its functions include network routers and telecom switches. The OXC is placed at an important junction on the network, collecting input from different wavelengths, and then transmitting each signal to the appropriate fiber at the appropriate wavelength.

Depending on the application, OXC can be divided into three categories: (1) FXC (Fiber Cross-Connect): FXC's role is the automatic fiber distribution frame, cross-connect provides the simplest configuration and network recovery capabilities. For some areas where large faults such as fiber breaks often occur, FXC is a viable solution. (2) WSXC (Wavelength selective Cross-Connect): WSXC can cross-connect any wavelength in any input fiber to any output fiber using the same wavelength. WSXC first demultiplexes the wavelength-multiplexed signals into single wavelengths, and then completes the cross-connect function between the wavelengths by the internal switch matrix, that is, the wavelength routing function, and finally combines the cross-connected wavelengths to the corresponding wavelengths. Fiber output. (3) WIXC (Wavelength Interchange Cross-Connect): WIXC is a wavelength conversion capable WSXC capable of cross-connecting any wavelength of any one of the input fibers to any one of the output fibers using different wavelengths.

However, due to the video packet of the video, there is a unicast/multicast mode, which usually requires point-to-multipoint transmission, but the traditional synchronous optical network/next-generation synchronous optical network plug-in multiplexer (SDH/NGSDH ADM) or dense wavelength The distributed multiplexer (DWDM)-based transmission network needs to perform optical (OE) conversion on the optical signal, and then solve the IP address, and then perform optical transmission in EO mode. This type of transmission has the following disadvantages: 1) After O/E, E/O conversion, it is easy to accumulate delay. (2) When the optical transmission rate is getting higher (40 Gbps, 100 Gbps), the high-speed interface of O-E-O is very expensive. (3) The interface needs Protocol transposition, whether it is IP/Ethernet/SDH, when the rate is higher, A software and hardware protocol upgrade is required.

It can be seen that there are still many shortcomings in the above-mentioned household items, which is not a good designer and needs to be improved.

In order to solve the above problems, the object of the present invention is to provide a protection function of a network video packet switching device and a handover device thereof.

To achieve the above object, the present invention provides a handover apparatus including a plurality of inputs, a plurality of outputs, a first optical splitter, and a second optical splitter. The inputs are for receiving a plurality of optical signals. The first optical splitter is connected to the input terminals, and the selected configuration optical signals are transmitted to the output through a plurality of dynamic channel equalizers. The second optical splitter selects at least one of the selected optical signals to reproduce the specific optical signal via a regenerative module, and transmits the regenerated at least one optical signal to the matched output via an optical coupler. End, to replace the original output of the optical signal.

To achieve the above objective, the present invention provides a protection function network video packet switching device, which comprises a plurality of optical input end groups, a plurality of optical output end groups, a plurality of the aforementioned optical delivery devices, a plurality of multiplexers, A plurality of demultiplexers and protective optical junction devices. Each light input end group further includes a plurality of sub-light input ends. Each of the light output groups further includes a plurality of sub-light outputs. The first end of the optical interface device is connected to the optical input end, and the second end of the optical interface device is connected to the optical output end. The input ends of the multiplexers are connected to the sub-inputs of each optical input group. A plurality of inputs of each of the demultiplexers are coupled to the sub-outputs of each of the optical output sets. The first end of the protection optical interface device is connected to the output end of the multiplexers, and the second end is connected to the input end of the demultiplexer.

In summary, the interleaved multiplexer/demultiplexer is interleaved with the optical interface device and the protection device, and the number of the optical junction device can be effectively reduced in addition to the original performance and protection function.

1‧‧‧Light junction device

11‧‧‧ input

12‧‧‧ Output

13‧‧‧First light splitter

14‧‧‧Dynamic channel equalizer

15‧‧‧Second light splitter

161‧‧‧ filter

162‧‧‧Optical Receiver

163‧‧‧Optical amplifier

17‧‧‧Optocoupler

2‧‧‧Light input group

21‧‧‧Sub-light input

3‧‧‧Multiplexer

4‧‧‧Demultiplexer

5‧‧‧Light output group

51‧‧‧Sub-light output

6‧‧‧Protective optical junction device

Figure 1 is a schematic diagram of a conventional light delivery device.

Fig. 2 is a view showing the internal structure of the optical delivery device of the present invention.

FIG. 3 is a schematic diagram of a network video packet switching device with protection function according to the present invention.

The specific embodiments are described below to illustrate the embodiments of the invention, but are not intended to limit the scope of the invention.

Please refer to FIG. 2, which is an internal structural diagram of the optical delivery device 1 of the present invention. The optical interface device 1 includes a plurality of input terminals 11, a plurality of output terminals 12, a first optical splitter 13 and a second optical splitter 15. The inputs 11 are for receiving a plurality of optical signals. The first optical splitter 13 is connected to the input terminals 11, and the selected optical signals are transmitted to the output terminal 12 via a plurality of dynamic channel equalizers 14 (DCEs). The second optical splitter 15 selects at least one of the selected optical signals to reproduce the specific optical signal via a regenerative module, and transmits the regenerated at least one optical signal to the matching via an optical coupler 17. The output is replaced by the original output optical signal.

The aforementioned reproducing module includes an optical filter 16, an optical receiver 162, and an optical amplifier 163. The optical filter 16 is at least one of selecting optical signals. The optical receiver 162 is connected to the optical filter 16, and photoelectrically converts the selected optical signal to provide a regenerative signal. Light The amplifier 163 reproduces the selected optical signal according to the reproduced signal. Each dynamic channel equalizer 14 is matched to a band.

To further illustrate, Figure 2 is the internal structure of a 16x16 WSS optical switch. The device uses a 1:16 optical splitter (S16) to replicate 16 optical signals, while the first 15 replicated optical signals enter 15 dynamic channels. The equalizer 14 performs the continuous transmission or blocking of the optical channel signal; and the 16th replicated optical signal re-enters a 1:1 (m+1) second optical splitter 15 (representing the number of optical signals in the optical fiber), The first re-creation optical signal is sent to the 16th dynamic channel equalizer 14, and the remaining m re-reproduced optical signals enter the optical filter 161 and the optical receiver 162, respectively, and according to the optical signal range of the optical signal. Filtering and terminating.

Please refer to FIG. 3 , which is a protection function network video packet switching device of the present invention, which comprises a plurality of optical input terminal groups 2 , a plurality of optical output terminal groups 5 , and a plurality of optical communication devices 1 . A plurality of multiplexers 3, a plurality of demultiplexers 4, and a protection optical interface device 6.

Each of the aforementioned light input end groups 2 further includes a plurality of sub-light input ends 21. Each of the light output end groups 5 further includes a plurality of sub-light output ends 51. The first end of the optical interface device 1 is connected to the light input end, and the second end of the optical interface device 1 is connected to the light output end. The inputs of the multiplexers 3 are connected to the sub-inputs 21 of the respective optical input groups 2. A plurality of input terminals of each of the demultiplexers 4 are connected to the sub-outputs of the respective optical output terminal groups 5. The first end of the protective optical interface device 6 is connected to the output of the multiplexer 3, and the second end thereof is connected to the input of the multiplexer 4.

To further illustrate, Figure 3 shows the use of a multiplex/demultiplexer (MUX/DEMUX) module to combine the 16 optical protection paths transmitted to the Layer 2 middle stage and send them to another 16x16 OXC for protection. Save 16x16 OXC (from 48→16+1), this case In addition to being able to have both non-blocking and protection capabilities, component costs are significantly reduced compared to prior art solutions.

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

1‧‧‧Light junction device

2‧‧‧Light input group

21‧‧‧Sub-light input

3‧‧‧Multiplexer

4‧‧‧Demultiplexer

5‧‧‧Light output group

51‧‧‧Sub-light output

6‧‧‧Protective optical junction device

Claims (7)

An optical interface device comprising: a plurality of input terminals for receiving a plurality of optical signals; a plurality of output terminals; a first optical splitter connected to the input terminals, and selectively arranging the optical signals via a plurality of dynamic channels An equalizer is transmitted to the output terminals; and the second optical splitter selectively accesses at least one of the optical signals to regenerate the specific optical signal via a regeneration module, and the reproduced optical signal At least one optical signal is transmitted to the matched output via an optical coupler to replace the original output of the optical signal. The optical interface device of claim 1, wherein the regenerative module comprises: an optical filter, selecting at least one of the optical signals; and an optical receiver connected to the optical filter, the optical receiver further selecting The optical signal is photoelectrically converted to provide a reproduced signal; and the optical amplifier is configured to reproduce the selected optical signal according to the reproduced signal. The optical interface device of claim 1, wherein each of the dynamic channel equalizers respectively matches a band. The optical handover device of claim 1, wherein each of the dynamic channel equalizers selectively transmits or blocks the optical signal. A network video packet switching device with a protection function comprises: a plurality of optical input groups, each of the optical input groups further comprising a plurality of sub-inputs; a plurality of optical output groups, each of the optical output groups further comprising a plurality of sub-light output terminals; a plurality of optical delivery devices according to claim 1, wherein the first end of the optical interface devices is connected to the optical connection device At the optical input end, the second end of the optical interface device is connected to the optical output terminals; a plurality of multiplexers, wherein the input ends of the multiplexers are connected to the sub-inputs of each of the optical input groups a plurality of demultiplexers, wherein the plurality of input ends of the demultiplexer are connected to the sub-outputs of each of the optical output groups; and the protective optical interface device, the first end of the protective optical interface device Connecting the outputs of the multiplexers, the second end of the protection optical interface device is connected to the input ends of the demultiplexers. The device of claim 5, wherein the multiplexers are passive multiplexers. The device of claim 5, wherein the demultiplexer is a passive demultiplexer.