Video transmission system of a ring network
It is an objective to provide a video transmission system enabling easy acquisition and addition of any video signal. According to the ring network, optical wavelength multiplexing and transmission of video signal to be utilized for this network is carried out, so that it is possible to implement an environment, in which all necessary video signals flow on the network. Consequently, by acquiring any video signal from the video signals flowing on the network, it is possible to acquire new video source, or by adding new video source to the network, it is possible to utilize the added video source by all apparatuses connected to the network.
1. The video transmission system of a ring network comprising:
a ring redundant network, which is for carrying out optical wavelength multiplexing of at least one video signal, utilizable in the system, and transmission of a multiplexed signal;
an acquisition unit for the multiplexed signal, which acquires the multiplexed signal in said ring redundant network;
an output unit for a first signal, which is capable of outputting any first video signal, demultiplexed from the acquired multiplexed signal, to external from said ring redundant network;
an input receiving unit for a second signal, which receives an input of any second video signal, external from said ring redundant network, to be included in the multiplexed signal in said ring redundant network;
an output unit for the multiplexed signal, which is capable of multiplexing of said second video signal, which has been inputted, and of outputting the multiplexed signal to said ring redundant network, and
a plurality of optical wavelength multiplexing apparatuses, and a plurality of video transmission apparatuses, adjacent to the respective optical wavelength multiplexing apparatuses, wherein
the optical wavelength multiplexing apparatus comprises the acquisition unit for a multiplexed signal, the output unit for the first signal, the input receiving unit for the second signal, and the output unit for a multiplexed signal,
the acquisition unit for a multiplexed signal comprises an acquisition means for a multiplexed signal, which acquires a multiplexed signal, outputted from another optical wavelength multiplexing apparatus,
the output unit for the first signal comprises an output means for the first signal, which is capable of outputting said first video signal to the adjacent video transmission apparatus, which is exterior of the ring redundant network,
the input receiving unit for the second signal comprises an input receiving means for the second signal, which receives an input of said second video signal from the adjacent video transmission apparatus, which is external from the ring redundant network, and
the output unit for the multiplexed signal comprises an output means for the multiplexed signal, which is capable of multiplexing said second video signal, and of outputting the multiplexed signal to another optical wavelength multiplexing apparatus, different from the optical wavelength multiplexing apparatus, which has acquired said multiplexed signal.
2. The video transmission system of a ring network according to claim 1 , wherein
said output unit for the first signal and said output unit for the multiplexed signal carry out said respective outputs, in which the signal is identifiable on the basis of wavelength of the carrier, the system further comprising:
a control apparatus, which carries out integrated control of said respective outputs on the basis of wavelength of the signal.
3. The video transmission system of a ring network according to claim 2 , wherein the control apparatus carries out said control by means of GMPLS.
4. The video transmission system of a ring network according to claim 2 , wherein
said output unit for the first signal and said output unit for the multiplexed signal carry out said respective outputs, in which the signal is identifiable on the basis of wavelength of the carrier, the system further comprising:
a control apparatus, which carries out integrated control of said respective outputs on the basis of wavelength of the signal.
5. The video transmission system of a ring network according to claim 4 , wherein the control apparatus carries out said control by means of GMPLS.
6. The video transmission system of a ring network according to claim 1 , wherein the video transmission apparatus comprises
a buffer unit, which buffers said video signal, inputted from the respective redundant systems,
a detection unit for failure, which detects a failure in an active system of said systems, and
an output switching unit, which carries out switching of output in order to output said video signal to another external video apparatus by means of said video signal, which has been inputted from the other system and buffered, in cases where said failure is detected.
7. The video transmission method of a ring network, which includes a ring redundant network, which is for carrying out optical wavelength multiplexing of at least one video signal, utilizable in a system, and transmission of a multiplexed signal, the method comprising:
an acquiring step for the multiplexed signal, which acquires the multiplexed signal in said ring redundant network;
an outputting step for a first signal, which is capable of outputting any first video signal, demultiplexed from the acquired multiplexed signal, to external from said ring redundant network;
an input receiving step for a second signal, which receives an input of any second video signal, external from said ring redundant network, to be included in the multiplexed signal in said ring redundant network; and
an outputting step for the multiplexed signal, which is capable of multiplexing said second video signal, which has been inputted, and of outputting the multiplexed signal to said ring redundant network, further including a plurality of optical wavelength multiplexing apparatuses, and a plurality of video transmission apparatuses, adjacent to the respective optical wavelength multiplexing apparatuses, wherein
the optical wavelength multiplexing apparatus is caused to execute the acquiring step for the multiplexed signal, the outputting step for said first signal, the input receiving step for said second signal, and the outputting step for a multiplexed signal,
the acquiring step for a multiplexed signal comprises
an acquiring step for the multiplexed signal, which acquires a multiplexed signal, outputted from another optical wavelength multiplexing apparatus,
the outputting step for said first signal comprises
an outputting step for said first signal, which is capable of outputting said first video signal to the adjacent video transmission apparatus, which is external from the ring redundant network,
the input receiving step for said second signal comprises
an input receiving step for said second signal, which receives an input of said second video signal from the adjacent video transmission apparatus, which is external from the ring redundant network, and
the outputting step for the multiplexed signal comprises
an outputting step for the multiplexed signal, which is capable of multiplexing said second video signal, and of outputting the multiplexed signal to another optical wavelength multiplexing apparatus, different from the optical wavelength multiplexing apparatus, which has acquired said multiplexed signal.
8. The video transmission system of a ring network according to claim 7 , wherein
said outputting step for said first signal and said outputting unit for the multiplexed signal carry out said respective outputting steps, in which the signal is identifiable on the basis of wavelength of the carrier, the method further comprising:
a controlling step, which carries out integrated control of said respective outputs by a unit of wavelength of the signal.
9. The video transmission method of a ring network according to claim 8 , wherein the controlling step carries out said control by means of GMPLS.
10. The video transmission system of a ring network according to claim 7 , wherein
said outputting step for said first signal and said outputting unit for the multiplexed signal carry out said respective outputting steps, in which the signal is identifiable on the basis of wavelength of the carrier, the method further comprising:
a controlling step, which carries out integrated control of said respective outputs by a unit of wavelength of the signal.
11. The video transmission method of a ring network according to claim 10 , wherein the controlling step carries out said control by means of GMPLS.
12. The video transmission method of a ring network according to claim 7 , wherein the video transmission apparatus comprises
a buffering step, which buffers said video signal, inputted from the respective redundant systems,
a detecting step for failure, which detects a failure in an active system of said systems, and
an output switching step, which carries out switching of output in order to output said video signal to another external video apparatus by means of said video signal, which has been inputted from the other system and buffered, in cases where said failure is detected.