JPS60137156A - Optical loop dispersed type exchange - Google Patents

Abstract

PURPOSE:To transmit and receive information of a device through minimum connection lines by using an optical loop transmission line and integrating talk information among all channel devices and control information necessary for switching operation in the optical loop transmission line. CONSTITUTION:Channel devices 10-1n which are arranged dispersedly are connected to the optical loop transmission line 5 and their operations are controlled by a central controller 2 connected to the transmission line 5. The device 10 includes a time-division multiplex highway 67 from the outside and consists of a signal processing circuit 62 which extracts and inserts signal information, a packet control circuit 64 which controls the transmission and reception of packet information, a distributing and collating circuit 65 for monitor control information which collects and distributes fault information and maintenance information, a control processing circuit 61 which controls the operations of them, and an optical loop transmission line interface circuit 66 which provides interfacing with a transmission line 5. The transmission area of the transmission line 5 is divided into a circuit exchange area, packet area, and fixed circuit area on time- division basis to interchange information among the respective devices.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a distributed switching system in which a plurality of communication path devices are arranged in a distributed manner.

PRIOR ART As shown in FIG. 1, a conventional distributed traffic checker has a connection line between a plurality of communication path devices io, ti, . . . ln for conveying call information. 301-30n, 3I
Each channel device 1 is connected by a control bus 4 for carrying exchange control information and supervisory control information, etc.
0 and a central control device 2 are connected. Therefore,
The conventional distributed switching system requires a control bus 4 in addition to the communication path, and has the disadvantage that it is not economical because it requires a large number of cables. Some devices install electronic jumpers to reduce the number of connection lines between call path devices, or multiplex call information and control information on the same line and distribute it using separately installed switch devices. teeth,
This method has the disadvantage that the scale of the equipment becomes large, it is not economical, and the advantages of decentralization cannot be achieved.

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional drawbacks, and to transmit communication information, etc., necessary for exchange operations, etc. between all communication path devices to the above-mentioned optical system by using an optical loop transmission line. An object of the present invention is to provide an optical loop distributed switch that can be integrated into a loop transmission path, enable information exchange between devices using the smallest connection line, and can also handle non-telephone type packet information.

Composition of the Invention The optical loop distributed switch of the present invention is a distributed switch that connects the inputs and outputs of a plurality of distributed communication path devices in a time division manner, in which the plurality of communication path devices are looped by an optical loop transmission path. dividing the transmission area of the optical loop transmission line into a circuit switched area for time-divisionally transmitting call information, a packet area for transmitting packet information, and a fixed line area for transmitting supervisory control information, etc., Each of the communication path devices is
A time switch circuit that connects sound and re-information from a terminal to an arbitrary time slot, a packet control circuit that sends and receives exchange control information necessary for exchange operation in packet format, and a circuit that exchanges monitoring control information such as failures. It is equipped with a monitoring control information distribution and collection circuit and a control processing circuit for controlling these operations, and a central control device is connected to the optical loop transmission path, and the packets of each of the communication path devices are controlled by the central control device. By receiving packet information sent from the control circuit and outputting exchange control information for controlling the exchange operation of each of the communication path devices, and by sending and receiving monitoring control information such as failures through fixed channels, call information is It is characterized by performing line switching and monitoring control of fault information.

Note that it is also possible to transmit packet exchange data between terminals using the packet control circuit.

Embodiments of the Invention Next, the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram showing one embodiment of the present invention.

That is, a plurality of communication path devices 10 arranged in a 1-minute lid
1n are connected in a loop by an optical loop transmission line 5, and a central control unit 2 connected to the optical loop transmission line 5 controls the operation of each communication path device 1VL10''In to exchange connection information such as call information. Figure 3 shows
2 is a block diagram showing details of the communication path device 10. FIG. That is, it accommodates the plane division multiplexing highway 67 from the outside,
A signal processing circuit 62 extracts and inserts signal information, a time switch circuit 63 exchanges time slots of call information, a packet control circuit 64 controls transmission and reception of packet information, and collects and distributes fault information and maintenance information. a monitoring control information distribution and collection circuit 65 for performing monitoring and control, a control processing circuit 61 for controlling these operations, and the time switch circuit 6.
3. It is composed of a packet control circuit 64, a monitoring control information distribution and collection circuit 65, and an optical loop transmission line interface circuit 66 that interfaces with the optical loop transmission line 5.

The signal processing circuit 62 separates and extracts signal information from the call information and signal information transmitted on the time division multiplex highway 67 and sends it to the control processing circuit 61 .
When determining based on this signal information that connection with another communication path is necessary, the request information is sent to the optical loop transmission path 5 via the packet control circuit 64. It also receives channel assignment information sent from other communication path devices or the central control device 2 via the packet control circuit 64, and controls the time switch circuit 63 accordingly. The time switch circuit 63 converts the call information into a time slot of a designated channel, and sends it to a line switching area of the optical loop transmission line 5, which will be described later, via the optical loop transmission line interface circuit 66. Connections from other channel devices are made in the reverse order as described above.

The monitoring control information distribution and collection circuit 65 collects and edits fault monitoring information within the device, sends it to a predetermined channel on the optical loop transmission line 5, and also sends it to the central control device 2 via a predetermined channel. Extracts information sent from the system to drive maintenance set points within the device.

As shown in FIG. 4, one frame of a signal transmitted on the optical loop transmission line 5 consists of a circuit switching area used for communication between each communication path device and a packet control circuit 64 of each communication path device.
A packet area used for exchanging control information between each other and between the central control unit 2, and a fixed line area used for fixed communication between the monitoring control information distribution and collection circuit 65 of each channel device and the central control unit 2. The size of each area is variably distributed according to the information length of each information type.

In this embodiment, since all call information, exchange control information necessary for exchange operation, and monitoring control information such as failures are transmitted through the optical loop transmission line 5, each communication line device is connected to each other and the central control unit 2 is connected. This has the effect of requiring fewer connection lines and interface circuits.

If the time division multiplex highway 67 includes packet information between terminals, the packet control circuit 64 is connected to the time division multiplex highway 67 as shown by the broken line in FIG. The packet control circuit 64 may extract the data and send it to the packet area of the optical loop transmission line 5''. The packet I/information received from the optical loop transmission line 5 is sent from the packet control circuit 64 to the time division multiplexing highway 67. Since the size of the packet area on the optical loop transmission line 5 is increased according to the amount of packet information, it is possible to use the optimal communication means according to the amount of information for each type of equipment between devices, providing flexibility. It is possible to provide a high-performance exchange system that is rich in information.

Effects of the Invention As described in Section 2, in the present invention, a plurality of communication path devices are connected by an optical loop transmission path, and the optical loop transmission path is used to exchange communication information and exchange operations between each device. Since the system is configured to transmit all control information, etc., it is possible to reduce the number of signal lines and interface circuits that connect a plurality of communication path devices and a central control device. In addition, time 141 multiplexing is performed by a packet control circuit that sends and receives control information necessary for switching operations.
It is also possible to exchange packet information on the wireless network, and provides the optimal means of communication depending on the type of information between devices.
By varying the transmission area according to the amount of information for each type, an extremely flexible and economical exchange system can be realized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional distributed switch,
FIG. 2 is a block diagram showing one embodiment of the present invention, FIG. 3 is a block diagram showing details of the communication path device of the above embodiment, and FIG.
The figure is a diagram showing an example of area distribution on an optical loop transmission path. In the figure, 2: central control unit, 4: control/circle, 5:
Optical loop transmission line, 10-1n dual channel device, 61: Control processing circuit, 62: Signal processing circuit, 63: FH switch circuit, 64: Packet control circuit, 65: Monitoring control information distribution and collection circuit, 66: Optical Loop transmission line interface circuit, 67: Time division multiplexing highway,: 301 to 30n,
31n: Connection line between communication path devices. Applicant: NEC Corporation Agent: Patent Attorney: Toshimune Sumita

Claims (1)

[Claims] (1) In a distributed switching system that connects the inputs and outputs of a plurality of distributed communication path devices in a time division manner, the plurality of communication path devices are connected in a loop by an optical loop transmission path, and the optical loop transmission path The transmission area is divided into a circuit switching area for transmitting call information, a packet area for transmitting packet information, and a fixed line area for transmitting supervisory control information, etc., and each of the communication path devices A time switch circuit that connects audio information to any time slot, a packet control circuit that sends and receives exchange control information necessary for exchange operations in packet format, and a supervisory control information distribution and collection unit that exchanges supervisory control information such as failures. and a control processing circuit for controlling these operations, a central n-horn control device is connected to the optical loop transmission path, and the central control device controls the packet control circuit of each of the communication path devices. Line exchange of call information is performed by receiving the transmitted packet information and outputting exchange control information for controlling the exchange operation of each of the above-mentioned communication path devices, and by sending and receiving monitoring control information such as failures through fixed channels. 1. An optical loop distributed switching system characterized by monitoring and controlling failure information. (2. In the optical loop distributed switching system according to claim 1, the packet control circuit also transmits packet exchange data between terminals to the packet I/O of the optical loop transmission line, in addition to the exchange control information. A device characterized in that it is configured to transmit and receive data depending on the region.