JP3296639B2 - Communication switching system device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication switching system device that performs communication while switching communication circuits in order to transmit transmission information transmitted from an information transmission device to a plurality of receiving devices.

[0002]

2. Description of the Related Art To transmit transmission information from one information transmission device to a plurality of reception devices, for example, when transmitting information from one terminal information processing device to a plurality of portable computers. Therefore, a signal switching device for switching and transmitting transmission information is required. FIG. 3 is a block diagram of a communication switching system device according to a conventional example. As shown in FIG. 3, a transmission signal transmitted from the information transmitting device 2 is transmitted to the receiving device 3 or the receiving device 4 via the switching device 1. In the information transmitting device 2, the communication information emitted from the transmission information unit 24 is added with the switching information by the information transmitting unit 22 under the control of the control unit 21, and is transmitted to the outside. The switching device 1 includes an A switching device 11, a B switching device 12, a switching information receiving unit 15, and a switching control unit 16, and the switching information receiving unit 15 checks switching information of a transmission signal transmitted from the information transmitting device 2. The transmission control unit 16 determines whether the transmission signal is to be transmitted to the reception device 3 or the transmission signal to be transmitted to the reception device 4, and the switching control unit 16 determines that the transmission signal is transmitted to the predetermined reception device according to the determination result. The switch 11 and the B switch 12 are controlled respectively. For example, when the transmission signal is sent to the receiving device 3 by the switching operation of the A-switch 11, the receiving unit 31 receives it, and the communication information is sent to the receiving storage unit 33 via the control unit 32, and Is stored.

FIG. 4 is a schematic diagram showing a configuration of a transmission signal transmitted from the information transmission device 2. The switching information is sent at the head of the transmission signal, and then the communication information that is substantially meaningful is sent. As described above, the switching information receiving unit 15 checks the switching information of the transmission signal transmitted from the information transmitting device 2 and determines which of the receiving devices 3 and 4 is the communication information to be transmitted, and the switching control unit 16 Causes the A switch 11 and the B switch 12 to switch according to the determination result, and stores the communication information in the determined reception storage unit 33 of the reception device 3 or the reception storage unit 43 of the reception device 4. As described above, the transmission signal transmitted from the information transmitting apparatus 2 includes the switches for the number of the receiving apparatuses even when there are three or more receiving apparatuses, and the switching information is determined by the switching information receiving unit 15, and the information transmission is performed. By transmitting the transmission signal output from the device 2 to the receiving device designated by the switching operation of the switch, the transmission signal can be separated and transmitted to a large number of receiving devices.

[0004]

By the way, since the switching information and the communication information constituting the transmission signal are constituted by digital signals having the same form, it is not possible to distinguish between the forms. Therefore, when a part of the communication information includes information having the same expression as the switching information, the switching information receiving unit 15 switches the information having the same expression as the switching information included in the communication information in the transmission signal to the original switching. Inconveniently, communication information is sent to a receiving device that should not be transmitted, and communication information is not sent to a receiving device that should be originally sent, and the switching information is erroneously determined and information is sent to a receiving device that should not be sent. Occurred. Therefore, in order to avoid the above-mentioned problem, the communication information is subjected to a use restriction such as not using information expressed in the same manner as the switching information, so that the communication information is correctly transmitted to the receiving device. Therefore, a transmission signal composed of a binary digital signal having high transmission efficiency cannot be transmitted from the information transmission device 2 as it is, and is converted into a transmission signal that does not cause erroneous determination of the switch. Conversion processing was required. For this reason, there has been another inconvenience that the cost associated with the installation of the conversion processing device, the time required for the conversion process, and the time required for the transmission are increased. The present invention has been made in order to solve such a problem in the related art, and even if a transmission signal constituted by a binary digital signal is processed without modification, a plurality of transmission signals can be used as they are. It is an object of the present invention to provide a communication switching system device that can separately transmit to a receiving device.

[0005]

According to the present invention, in order to solve the above-mentioned problems, an information transmitting apparatus adds a switching request signal before transmitting switching information transmitted together with communication information from the information transmitting apparatus and transmits the signal. A switching device that has a switching request signal adding unit, switches a transmission path, and selectively transmits communication information transmitted from the information transmitting device to any of the receiving devices checks a switching request signal transmitted from the information transmitting device. When it is confirmed that the received signal is the switching request signal, the switching means transmitted following the switching request signal is sent to the determination means for determining the receiving device to be selected based on the switching information indicating the receiving device to be selected. It has a switching request signal confirming means for transmitting a determination permission signal for receiving only information.

[0006]

The information transmitting device transmits the switching information together with the communication information. The switching request signal adding means adds a switching request signal indicating a receiving device to be selected before transmitting the switching information transmitted from the information transmitting device, and transmits the signal. The switching request signal confirmation unit checks the switching request signal transmitted from the information transmitting device,
When it is confirmed that the received signal is the switching request signal, a determination permission signal for receiving only the switching information transmitted subsequent to the switching request signal is transmitted to the determination unit. The determining means determines a receiving device to be selected based on the received switching information. The switching device switches the transmission path based on the determination result of the determining unit, and selectively sends out the communication information transmitted from the information transmitting device to any of the receiving devices.

[0007]

An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram of a communication switching system device according to one embodiment of the present invention. The same reference numerals are given to portions which are the same as or can be regarded as the same as those in the conventional example, and redundant description thereof will be omitted. As shown in the figure, in the present embodiment, a switching request transmitting unit 23 is newly provided in the output stage of the information transmitting device 2, and a switching request confirming unit 14 is newly provided in the input stage of the switching device 1. FIG. 2 is a schematic diagram illustrating a configuration of a transmission signal transmitted from the information transmission device 2. As shown in FIG. 2, a switching signal is transmitted prior to the switching information at the head of the transmission signal. The operation of the embodiment will be described below. The switching request transmitter 23 generates a switching signal composed of a specific wide-width rectangular wave and outputs it to the head of the transmission signal. The switching request confirmation unit 14 checks the initial signal pulse width of the transmission signal received by the switching device 1 and confirms that the switching signal has a width within a predetermined range. As a result, the switching information receiving unit 15 receives the switching information added by the information transmitting unit 22, checks the contents thereof, determines which of the receiving devices 3 and 4 should be sent, and switches the result. The information is transmitted to the control unit 16. The switching control unit 16 controls the switching operation of the A switch 11 or the B switch 12 according to the received determination information. The switching information receiving unit 15 receives the switching information, checks its contents, and transmits the determination information, and thereafter stops the receiving operation. Therefore, even if a part of the communication information includes information having the same expression as the switching information, the switching information receiving unit 15 does not receive the information.
Can be prevented from erroneously determining information having the same expression as the switching information included in the communication information as the switching information. As described above, a switching signal composed of a specific wide-width rectangular wave is added before transmitting the switching information of the transmission signal, and the switching information is received by the switching information receiving unit 15 after confirming the switching signal. Since only the switching information is received, the distinction between the switching information and the communication information becomes clear, and a communication switching system that does not require any restriction on the communication information can be realized.

[0008]

As described above, according to the first aspect of the present invention, the information transmitting apparatus transmits a switching request signal by adding a switching request signal before the switching information transmitted from the information transmitting apparatus. Checks the switching request signal transmitted from the information transmitting device, and when it is confirmed that it is a switching request signal, because the determination means to receive only the switching information sent subsequent to the switching request signal, Even in the case of communication information composed of binary digital signals, the switching information and the communication information can be clearly distinguished from each other without any restrictions on the transmission signal. The communication information can be separately transmitted to a plurality of receiving devices in a form. According to the second aspect of the present invention, the switching request signal is formed by a rectangular wave having a specific width wider than the pulse width of the pulse signal forming the switching information and the communication information forming the transmission signal. Generation and confirmation of the received switching request signal can be easily performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a communication switching system device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of a transmission signal transmitted from an information transmission device.

FIG. 3 is a block diagram of a communication switching system device according to a conventional example.

FIG. 4 is a schematic diagram showing a configuration of a transmission signal according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switching device 2 Information transmitting device 3, 4 Receiving device 11 A switching device 12 B switching device 14 Switching request confirmation unit 15 Switching information receiving unit 16 Switching control unit 22 Information transmitting unit 23 Switching request transmitting unit 33, 43 Receiving storage unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04L 12/28 H04L 12/44-12/46 H04Q 9/00-9/16 H04J 9/00-9 / 06

Claims (2)

(57) [Claims] An information transmitting apparatus for transmitting a transmission signal including communication information including a digital signal including a binary digital signal, and a plurality of receiving apparatuses for receiving a transmission signal including communication information transmitted from the information transmitting apparatus. And, comprises a switching device that switches the transmission path and selectively sends out the communication information transmitted from the information transmitting device to any one of the receiving devices, and the information transmitting device is configured to transmit the communication information before the transmitted communication information. A switching information adding unit that adds switching information indicating the receiving device to be selected and transmits the switching information, wherein the switching device should be selected based on the switching information transmitted together with the communication information from the information transmitting device. In a communication switching system device including a determination unit for determining the receiving device, the information transmitting device transmits a switching request signal before the switching information transmitted from the information transmitting device. A switching request signal adding means for adding and transmitting a signal, and the switching device checks the switching request signal transmitted together with the switching information from the information transmitting device, and determines that the switching request signal is the switching request signal. A communication switching system device, comprising: a switching request signal confirmation unit that sends a determination permission signal that causes the determination unit to receive only the switching information transmitted after the switching request signal when the determination is made. 2. The switching request signal according to claim 1, wherein the switching request signal is formed by a rectangular wave having a specific width wider than a pulse width of a pulse signal forming a switching signal and communication information forming a transmission signal. Communication switching system device.