JPH11243409A - Method for efficiently connecting stm optical fiber network and for connecting large scale network requiring no exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse with an exchange and to eliminate the waste in optical fiber cables by respectively connecting optical fibers onto a cincle as a pair, connecting a unit to the optical fibers to transmit and receive and transmitting a slot, that can cover from low speed to high speed in cell synchronous multiplexing communication from a network management place in a network. SOLUTION: When information that passes in a pair of optical fiber cables connected onto a circle and undergoes cell synchronous multiplexing passes through an optical transmission unit 6, an address attached in the progressing direction of a cell is read by a cell reader 6-1-i and receives it based on a recognition address. Also, the information which is cellularized based on a cell information transmitting and eliminating device 6-1-j, i.e., cell synchronous multiplex information is superimposed on a slot of a wavelength defined beforehand and transmitted by selecting the shortest distance transmission turns line between the two transmission lines. The device 6-1-j receives a signal and turns it into an eliminable and writable slot.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables efficient transmission and connection by separately connecting two optical fibers on a cycle in cell synchronous multiplex transmission. It is a technical field.

[0002]

2. Description of the Related Art Conventional communication always exists in a certain area.
The information is transmitted once to the relay station and connected through multiple exchanges.

[0003]

In a conventional switching system, a large number of optical fibers are required for transmission to a relay station.
There is a problem that it is necessary to provide a cable and an exchange.

[0004] The present invention eliminates the need for an exchange and uses an optical fiber.
The purpose is to minimize cable waste.

[0005]

In order to achieve the above-mentioned object, in the cell synchronous multiplexing communication of the present invention, optical fiber cables are separately connected in pairs on a cycle. By using different transmission directions, information can be transmitted and received over the shortest distance.

In the above-mentioned optical transmission system, a slot capable of transmitting cell-synchronous multiplexing information from a low speed to a high speed by changing the wavelength steplessly using a spectral wavelength is previously determined from a network management office in the network. The vehicle starts and the transmission path can be transmitted without waste.

[0007] Further, by receiving all information without converting it into electrical signals, it is possible to minimize the loss due to transmission.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, cell-synchronous multiplexed information passing through a pair of optical fiber cables connected on one cycle is shown in FIG. 6-1-i, the address (header) attached to the traveling direction of the cell is read and received based on the recognized address. For transmission, cell-synchronous multiplexed information is placed in a slot of a predetermined wavelength by putting the cellized information based on FIG. 2-6-1-j, and the shortest distance transmission path among the two transmission paths Select and send. See Figure 2-6 for erasure.
FIG. 2-6-1-j receives the signal received from -1-i and FIG.

FIG. 2 is an enlarged view of FIG. 1-3. In FIG. 3, H`.B` connected to the failed unit A` is shown in FIG. To transmit information.

FIG. 4 is an enlarged view of FIG. 1-2, which performs transmission of a spectral wavelength and management of a network.

[Brief description of the drawings]

FIG. 1 shows an optical fiber cable connected to a circuit.

FIG. 2 is a transmission unit

Fig. 3 Transmission system when a failure occurs and information transmission system when a unit is added

FIG. 4 Network management office

[Explanation of symbols]

1 Optical fiber transmission path 2 Network management office and spectrum slot transmission 3, 4, 5, 6 STM cell synchronous multiplexing, transmission, reception,
Transmission line optical transmission unit 7, 8 Network management office and spectrum slot transmission office

Claims (7)

[Claims] An optical fiber (1) is connected in pairs on a circuit, and (3) a unit is connected to (1) to perform transmission / reception, and cell synchronous multiplexing. An upper network that can cover from low speed to high speed, which is a problem in communication
Within the network, this is a connection technology that does not require an exchange. (1) The optical fibers have different transmission directions (4.5a, 4.5b) and use (3) not only for transmission / reception but also as a passing point of information. It is very efficient, and (1) is a connection technology that enables the use of an optical fiber. 3. (FIG. 2-6-1.i) is a technique for receiving only necessary information without converting all information synchronously multiplexed into cells into electric signals. (FIG. 2-6-1.j) is a technique for transmitting cell-synchronous multiplex information on a wavelength having a predetermined speed. 5. In (FIG. 2-6-1.j), information received unexpectedly from the transmission can be received from (FIG. 2-1-1.i) and a signal can be erased and written into the erased slot. It is performed at the same time. (6) (Fig. 4-7) is a technology connected to (1), which starts a spectrum wavelength, sends out slots from low speed to high speed in the transmission path, and uses the transmission path without waste. 7. An optical fiber transmission line (4.5a, 4.5b)
If the connected unit (6) fails, the failed unit (6) does not pass through the failed unit (6) based on a self-diagnosis program built in the unit (6) in the target direction of the failed unit (6). , (Fig. 3). The same method is used when adding the unit (6).