JP2569875B2 - Digital communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for a high-speed and wide-band digital communication system. In particular, the present invention relates to a single digital transmission system, a hybrid communication system capable of simultaneously providing an ATM exchange and an STM exchange via the same call control signal.

〔Overview〕

According to the present invention, in a digital communication system in which cell information and container information are exchanged, by providing means for identifying cell information and container information, communication can be performed via a single digital transmission line and the same call control signal. Is made possible.

[Conventional technology]

In the conventional example, the cell information and the container information each take an independent communication system connected to the ATM switching means and the STM switching means via different transmission paths, and establish an independent switching network using independent call control signals. Was composed. FIG. 2 shows a conventional example in which information is communicated from user 1 to user 2. A transmission system and a switching network are selected each time according to the form of the information, and a cell transmission means 100 and an ATM switching means 110 for a cell. Container transmission means 200 and STM exchange means 210 for containers
And were used independently.

[Problems to be solved by the invention]

As described above, in the conventional example, since the cell information and the container information communicate between the users via the independent communication system / switching network, independent communication devices for the cell information and the container information are provided on each user interface. Had to be prepared.

[Means for solving the problem]

The present invention relates to a switching means having a first switching means for exchanging cells which are digital information in fixed length packets and a second exchanging means for exchanging containers which are digital information accommodated in a fixed-capacity high-speed channel. In a digital communication system in which a communication node sends and receives a frame composed of an overhead including a call control signal and a payload in which either a cell or a container is stored, via
The communication node on the transmitting side includes first information type identification means for giving, to the call control signal, type information indicating whether the digital information to be transmitted is a cell or a container, and the switching means relates to an incoming frame. According to the configuration information, the identification and distribution unit that provides the payload included in this frame to one of the first switching unit or the second switching unit and the configuration information included in the overhead that is provided to the payload via the own unit. The communication node on the receiving side includes second information type identification means for matching the type information included in the overhead given to the payload, and the third information type identification means for recognizing and displaying the type information related to the incoming frame. It is characterized by having.

[Action]

The communication node on the transmitting side provides the call control signal included in the overhead with form information indicating whether the digital information stored in the payload is cell information or container information. The exchange means uses an ATM according to the morphological information related to the incoming frame.
The payload is distributed to the switching means or the STM switching means, and morphological information relating to the frame arriving at the time of transmission is added to the payload. The communication node on the receiving side recognizes and displays the morphological information related to the incoming frame.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention.

In this embodiment, as shown in FIG. 1, the ATM switching means 110 which is the first switching means for exchanging cells which are fixed-length packetized digital information and the digital information accommodated in the fixed-capacity high-speed channel. A switching unit having an STM switching unit 210 as a second switching unit for exchanging a container, and an overhead including a call control signal via this switching unit and a payload in which either a cell or a container is stored. User 1 and 2 which are communication nodes for transmitting and receiving frames composed of: and further, as a characteristic feature of the present invention, the user 1 which is a communication node on the transmission side transmits digital information to any one of a cell and a container. The call control signal is provided with information form identification means 30 for giving form information indicating whether the call control signal is The information form identifying means 31 and the distributing means 40, which are the identifying and distributing means for giving the payload included in this frame to either the first exchange means or the second exchange means in response to the information, An information form identification means 32 for matching the form information included in the given overhead with the form information included in the overhead given to this payload, and the receiving communication node recognizes the form information related to the incoming frame. An information form identification unit 33 for displaying is provided.

 Next, the operation of this embodiment will be described.

When performing information communication from the user 1 to the user 2, the transmission information is contained in the payload of the transmission frame by the information multiplexing means 10, and the information form identification means 30 is provided by the accommodation form display means.
Digital transmission means for form information via call control signal according to 50
Give to 20. This information is received by the digital transmission means 21 and the information form identification means 31 recognizes the information form and outputs an identification signal.
70 is output to the control means 80. The information multiplexing means 11 extracts the payload from the received frame, and the control means 80
According to the identification signal 70, the cell information is distributed to the ATM switching means 110, the container information is distributed to the STM switching means 210, and the distribution means 41 on the outgoing line side selects the information to be connected to the user 2 from the signals 90. And output as 91.

According to such a procedure, the information exchanged by the respective exchange means is transmitted to the receiving user.

〔The invention's effect〕

As described above, the present invention simultaneously communicates cell information and container information originally communicating via a transmission system / switching network with different attributes through a single digital transmission system / the same call control signal. In particular, in the hybrid communication system, since processing can be performed in units of frames, there is an advantage that a switching system that is dynamic and flexible and requires no extra functions can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of a conventional example. 1, 2, ... user, 10, 11, 12, 13, ... information multiplexing means,
20, 21, 22, 23 ... Digital transmission means, 30, 31, 32, 33
... Information form identification means, 40, 41 ... Distribution means, 50, 51 ...
... accommodation mode display signal, 70, 71 ... identification signal, 80 ... control means, 90, 91 ... signal, 100 ... cell transmission means, 110 ...
ATM exchange means, 200: container transmission means, 210: STM exchange means.

Claims (1)

(57) [Claims] An exchange having first exchange means for exchanging cells which are digital information of fixed length packetized and second exchange means for exchanging containers which are digital information accommodated in a high-speed channel having a fixed capacity. In a digital communication system in which a communication node transmits and receives a frame including an overhead including a call control signal and a payload containing either a cell or a container, a communication node on the transmitting side transmits the digital A first information form identification means for giving form information indicating whether the information is a cell or a container to the call control signal, wherein the exchange means comprises: the first exchange means according to form information replacing an incoming frame. Alternatively, the identification / distribution means for providing the payload included in this frame to one of the second exchange means and Second information type identification means for matching the type information included in the overhead given to the payload passing through the stage with the type information included in the overhead given to the payload; A digital communication system comprising a third information form identification means for recognizing and displaying related form information.