JPS60177793A - Frequency division channel equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a communication path device that exchanges and connects a plurality of input lines and a plurality of output lines, and particularly relates to a communication line device that connects and exchanges a plurality of input lines and a plurality of output lines. Relating to split channel equipment.

(b) Background of the technology In ordinary telephone exchanges, the frequency band of voice signals exchanged and connected by communication path devices such as networks is 4 kilohertz, but the types of signals that are exchanged and connected are diversifying.
For example, in the case of exchanging and connecting image signals transmitted and received by video telephones and the like, it is necessary to target signals having a frequency band of several megahertz.

(c+ Conventional technology and problems) Although it is not impossible to exchange and connect signals of several megahertz with the conventional space-back type communication path equipment,
The communication path switch must be expensive. In addition, conventional time-division communication path devices are designed for voice signals of 64 kilobits per second and can be constructed using relatively inexpensive elements. requires a high-speed device on the order of nanoseconds, making it difficult to realize economically.

(d) Object of the Invention An object of the present invention is to eliminate the drawbacks of the conventional communication path devices as described above, and to economically realize a communication path device capable of exchanging and connecting broadband signals.

tel Structure of the Invention The object of the present invention is to provide a transmitting circuit provided corresponding to a plurality of input lines, a receiving circuit provided respectively corresponding to a plurality of output lines, and each transmitting circuit and each receiving circuit. It is composed of a single connecting bus and a common control circuit, and each of the transmitting circuits converts the original signal arriving from the corresponding input line into a signal within a unique frequency band different from each other and sends it to the single bus. The common control circuit specifies a frequency band to be selected for each receiving circuit based on information exchanged between the input line and the output line, and each receiving circuit selects a frequency band within the frequency band specified by the common control circuit. This is achieved by selectively receiving a signal from the single bus, restoring it to the original signal arriving from the input line, and transmitting it to the corresponding output line; a receiving circuit provided corresponding to a plurality of output lines, a single bus connecting each of the transmitting circuits and each receiving circuit, and a common control circuit. The circuit specifies a frequency band to be converted to each of the transmitting circuits based on information exchanged between the input line and the output line, and each of the transmitting circuits specifies the original signal arriving from the corresponding input line from the common control circuit. converting the signal into a signal within the specified frequency band and sending it to the single bus;
This is achieved by the receiving circuit selectively receiving signals within different unique frequency bands from the single bus, restoring the signal to the original signal arriving from the input line, and transmitting the restored signal to the corresponding output line.

That is, in the present invention, signals arriving from each input line are frequency division multiplexed by a transmitting circuit and transmitted to each receiving circuit, and the receiving circuit to be exchanged and connected selectively receives signals in a desired frequency band. Therefore, each component circuit can be realized economically.

(fl　Embodiments of the invention An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a frequency division channel device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the configuration of the transmitting circuit in FIG. 1, and FIG. 4 is a diagram showing an example of a circuit configuration, and FIG. 4 is a diagram showing an example of a signal arrangement in FIG. 1. FIG. In FIG. 1, it is assumed that n input lines 1-1 to 1-n and n output lines 2-1 to 2-n are exchange-connected. Name input line 1-1
It is assumed that each of the output lines 2-1 to 2-n transmits and receives an original signal dO within the fundamental frequency band bO. Name input lines 1-1 to 1-n are connected to transmitting circuits 3-1 to 3-n, respectively, and each output line 2-1
The transmitting circuits 3-1 to 3-n and the receiving circuits 4-1 to 4-n are connected to each other by a single bus 5. be done.

Each transmitting circuit 3-i (f is 1 to n, the same applies hereafter) uses a modulator 31 to modulate the original signal dO arriving from the corresponding input line 1-i using a unique carrier wave fi, and passes it through a unique frequency band b+. After converting into a converted signal di through a band filter 32, it is sent to the single bus 5. As a result, each original signal dO arriving from input lines 1-1 to 1-n is
The converted signals dl to dn within the frequency bands bl to bn are frequency division multiplexed and transmitted via the single bus 5 to each of the receiving circuits 4-1 to 4-n. Also, the receiving circuit 4-j
(j is 1 to n, the same applies hereafter) are filters 41-1 to 41-n that separate the converted signals dl to dn in the different wave number bands b1 to bn, respectively, and filters 41-1 to 41-n that separate the converted signals dl to dn, respectively, and demodulator 4 that demodulates each original signal dO
2-1 to 42-n and each demodulator 42-1 to 42-n
It is composed of a selection circuit 43 that selects the original signal dO outputted by the common control circuit 6 according to a specification from the common control circuit 6, and sends it to the corresponding output line 2-j. On the other hand, the common control circuit 6 connects the receiving circuit 4 based on exchange information regarding which input lines 1-1 to l-n and which output lines 2-1 to 2-n are connected.
-1 to 4-n specify carrier waves fl to fn to be selected. For example, when connecting the input line 1-n and the output line 2-1 in exchange, the common control circuit 6 designates the carrier wave fn to the receiving circuit 4-1. The receiving circuit 4-1 designated with the carrier wave fn selects the filter 41-n by the selection circuit 43.
a demodulator 42 that demodulates the converted signal dn within the frequency band bn received via the base frequency band bO into the original signal dO within the fundamental frequency band bO.
-n output signal is selected and sent to output line 2-1.

The common control circuit 6 also transmits the carrier wave f to be used for the other receiving circuits 4-2 to 4-n based on the required exchange connection information.
Specify l to fn and select the corresponding frequency band bl to bn.
The converted signals dl to dn are selectively received.

Next, FIG. 5 is a diagram showing a frequency division channel device according to another embodiment of the present invention, FIG. 6 is a diagram showing an example of the configuration of the transmitting circuit in FIG. 5, and FIG. It is a figure which shows the example of a structure of the receiving circuit in a figure. In FIG. 5, the common control circuit 6° controls each input line 1-1 to 1-n based on the exchange information between the input lines 1-1 to 1-n and the output lines 2-1 to 2-n.
Transmission circuit 3'-1 provided corresponding to -1 to 1-n
The carrier waves fl to fn to be selected are specified to 3" to 3"-n. The transmitting circuit 3°-1 has a modulator 33- which modulates the original signal do arriving from the corresponding input line 1-i with the carrier waves f1 to fn, respectively. 1 to 33-n, filters 34-1 to 34-n whose passbands are the respective wave number bands b1 to bn, and filters 34-1 to 34-n according to instructions from the common control circuit 6°.
It consists of a selection circuit 35 that selects the output signals of 34-n to 34-n and sends them to the single bus 5, each having a corresponding input port! The original signal dO in the fundamental frequency band bQ arriving from la 1-i is converted into converted signals dl to dn in the designated frequency bands bl to bn and sent to the single bus 5.

Receiving circuit 4°- provided corresponding to each output line 2-j
j selects and receives a converted signal dj within a specific frequency band bj from among the frequency division multiplexed converted signals dl to dn arriving from the single bus 5, and further demodulates it using a specific carrier wave fj. The demodulator 45 demodulates the original signal dO within the fundamental frequency band bO and sends it to the corresponding output line 2"-j. In FIG. 3, for example, the input line 1-1 and the output line "l-n" are exchanged. When connecting, the common control circuit 6'' specifies the carrier wave fn to the transmitting circuit 3''-1. Transmission circuit 3 designated with carrier wave fn
-1 converts the original signal dO arriving from the input line 1-1 into a converted signal dn within the frequency band bn, and then converts the single bus 5
Send to. The receiving circuit 4"-n receives frequency division multiplexed conversion signals dl to dnO arriving from a single bus 5.
A converted signal dn within a specific frequency band bn is selectively received from among them, and further demodulated into an original signal dQ within a fundamental frequency band bO and sent to a corresponding output circuit vA2°-n.

As is clear from the above explanation, according to this embodiment, the original signals dO arriving from the input lines 1-1 to 1-n,
are the converted signals dl to dn within the frequency band bl to bn
The signal is frequency-division multiplexed, transmitted via the single bus 5, and sent out after being restored to the original signal dO to the corresponding output lines 2-1 to 'l-n.

(g) Effects of the Invention As described above, according to the present invention, it is possible to economically realize a communication line device capable of exchanging and connecting broadband signals.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a frequency division channel device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the configuration of the transmitting circuit in FIG. 1, and FIG. 3 is an example of the configuration of the receiving circuit in FIG. 1. 4 is a diagram showing an example of the signal arrangement in FIG. 1, FIG. 5 is a diagram showing a frequency division channel device according to another embodiment of the present invention, and FIG. 6 is a diagram showing an example of the signal arrangement in FIG. 5. FIG. 7 is a diagram showing an example of the configuration of the receiving circuit in FIG. 5. FIG. In the figure, 1-1 to 1-n are input lines, 2-1 to 2-n are output lines, 3-1 to 3-n and 3"-1 to 3'-n are transmitting circuits, and 4-1 to 2-n are transmitting circuits. 4-n and 4"-
1 to 4"-n are receiving circuits, 5 is a flower, 6 and 6 are
' is a common control circuit, 31 and 33-1 to 33-n are modulators, 32, 34-1 to 34-n, 41-1 to 4
1-n and 44 are filters, 42-1 to 42-n and 45 are demodulators, bO is the fundamental frequency band, bl to b
n is a frequency band, do is an original signal, dl to dn are converted signals, and fl to fn are carrier waves. 1st N 3- and 2nd monkyo 4th mon, 2nd f-5th

Claims (1)

[Claims] (]) A transmitting circuit provided corresponding to a plurality of input lines, a receiving circuit provided respectively corresponding to a plurality of output lines, and each of the transmitting circuits and each receiving circuit. and a common control circuit, and each transmitting circuit converts the original signal arriving from the corresponding input line into a signal within a unique frequency band different from each other and transmits the signal to the single bus. transmission, the common control circuit designates a frequency band to be selected to each of the receiving circuits based on information G exchanged between the input line and the output line, and each of the receiving circuits selects a frequency band to be selected from the common control circuit. 2. A frequency division communication path device, wherein said signal is selectively received from said single lot, restored to the original signal arriving from said input line, and sent to said corresponding output line. (2) A transmitting circuit provided corresponding to a plurality of input lines, a receiving circuit provided corresponding to a plurality of output lines, and a single bus connecting each of the above-mentioned transmitting circuits and each receiving circuit. and a common control circuit, wherein the common control circuit specifies a frequency band to be converted to each of the transmitting circuits based on exchange information between the input line and the output line, and each of the transmitting circuits specifies the frequency band to be converted to the corresponding input line. The common control circuit converts the original signal arriving from the line into a signal within a specified frequency band and sends it to the single bus, and the receiving circuit converts the signal within a unique frequency band that is different from each other to the single bus. 1. A frequency division communication path device, wherein the frequency division channel device selectively receives a signal from the input line, restores it to an original signal arriving from the input line, and sends the restored signal to the corresponding output line.