JPS6024739A - Radio circuit switching device - Google Patents

Abstract

PURPOSE:To save a cost not by using a connecting control channel as an exclusive channel but by using an arbitrary dead one channel for communication. CONSTITUTION:When one of terminal wireless installation groups transmits a connection requirement signal through a certain channel, the control part 8 which has received the signal transmits controlling information on connecting channels, etc., for terminals of calling and receiving parties through the channel, and controls the switch network 1 so that arbitrary two channels corresponding to transmission/reception parts 3 and 5 can be connected. Under this condition, where one of other therminal wireless installation groups requires connection, the control part 8, first controls the switch network 1, cuts the line between the modulation/demodulation part 7 and transmission/reception part 4, and connects the line between the transmission/reception parts 2 and 4, after the control part 8 has sent controlling information on connecting channels, etc., for terminal wireless installation of calling and receiving parties through the channel of the transmission/reception part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line switching device for wireless communication.

A conventional device of this type is shown in FIG.

In the figure, 1 is a switch network, 2. 3. 4. 5 is a channel connected to this switch network 1 (hereinafter referred to as CH)
These are different transmitting/receiving units, each of which performs transmission and reception with the terminal radio. 6 is a transmission/reception unit for connection control signals; 7 is a modulation/demodulation unit that modulates and demodulates connection control signals transmitted and received by this transmission/reception unit 6; 8 is the above-mentioned transmission/reception units 2 to 6;
and a communication channel between the two transmitting/receiving units 2 to 5 according to the connection control signal received by the transmitting/receiving unit 6.
It is a control section that forms the

Next, the operation will be explained. The control unit 8 normally transmits connection control signals such as line availability information 1 call control information from the modulation/demodulation unit 7 via the connection control CH dedicated transmission/reception unit 6.

Now, when one of a group of moving terminal radios tries to start communication with another one, the radio in question sends a connection request to the switching equipment according to the information on the connection control CH sent from the switching equipment. Send to.

When this connection request is normally received, the control section 8 transmits control information such as the connection CH to the calling terminal radio device and the called terminal radio device to the modulation/demodulation section 7. Communication is started by controlling the switch network 1 to transmit via the transmitting/receiving section 6 and then connecting any 2 CH1, for example, a line corresponding to the transmitting/receiving section 2.3.

Furthermore, when a connection request is generated from a different terminal radio set, 2CH of the transmitting/receiving unit 4.5 is connected using the same procedure.

Conventional wireless line switching equipment is configured as described above, and requires an ICH at all times for exclusive use of connection control.As a result, an extra ICHC is also required for the transmitter/receiver section, so this is especially true for small-scale switching equipment with a small number of channels. Each section dedicated to the connection control CH occupies a high cost ratio to the total cost, which has the disadvantage of poor economic efficiency.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by using any empty ICH for communication instead of making the connection control CH a dedicated CH, The object of the present invention is to provide a wireless line switching device that can be configured with only the number of channels.

An embodiment of the present invention will be described below with reference to the drawings. Second
The figure shows a wireless line switching device according to an embodiment of the present invention, and in the figure, 1 is a switch network. 7
is a modulation/demodulation unit for modulating/demodulating the connection control signal, and is connected between the switch network 1 and the control unit 8. In the device of this embodiment, the control unit 8 controls the switch network 1 to transmit communication channels between two of the transmitting/receiving units 2 to 5, and transmits the communication CH to the modem unit 7.
A connection control CH is formed between the transmitter and receiver and one of the transmitter/receivers 2 to 5.

Next, the operation will be explained. First, when there is no connection between any CHs, the modulation/demodulation section 7 uses the line connected to the switch section 5 to transmit or receive data to or from a group of moving terminal radios using the CI of the transmitting/receiving section 5.

transmits control information such as the connection CH to the terminal radios on the calling and called sides through the same CH, and then connects to any 2 CH1.
For example, the switch network 1 is controlled to connect lines corresponding to the transmitting/receiving units 3 and 5, and communication is started.

In this state, if a connection request is generated from another device in the terminal radio group, the control unit 8 transmits control information such as the connection CH to the terminal radios on the calling side and the called side using the CH of the transmitting/receiving unit 4. After that, first, the switch network 1 is controlled to disconnect the line between the modulation/demodulation section 7 and the transmitting/receiving section 4, and then the line between the transmitting/receiving sections 2 and 4 is connected. The modulation/demodulation section 7 is now not connected to any transmitting/receiving section. In other words, connection control OH
It is the disappearance of At this time, all CHs are used for communication, and connection requests from the terminal wireless device group are not possible in this connection control CH disappearing state.

On the other hand, the connection control CH is generated at the end of communication. That is, when the control unit 8 determines that communication has ended due to a tone signal, power cut, or time over, the corresponding communication line, for example, the line between the transmitting and receiving units 3 and 5, is disconnected, and then the connection control signal is The modulation/demodulation section 7 is connected to the vacant transmitting/receiving section 3 or 5. When a connection control CH is generated in this way, connection requests from the terminal radio device group can be accepted again.

Although the above embodiment describes the case of only wireless communication, the switch network 1 also includes a private branch telephone exchange (PBX).
Various terminal devices such as the above may be connected and a line connection may be made between the terminal radio device group and the terminal radio device group.

Further, two systems of each section for connection control signals may be connected to the switch network 1 to form a duplex system. In this case, a more reliable wireless line switching device can be formed.

As described above, according to the present invention, the connection control signal modulation/demodulation section is connected to the switch network as one terminal, and the communication CH and connection control C1 (are shared), so the device becomes inexpensive and This has the effect of providing a highly flexible product.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the configuration of a conventional wireless line switching device, Figure 2
The figure is a diagram showing the configuration of a wireless line switching device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Switch network, 2-5... Transmission/reception part, 7...
Modulation/demodulation section, 8...control section. In the drawings, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2

Claims (1)

[Claims] (1) A plurality of transmitting/receiving units for transmitting and receiving data to and from terminal radios, a switch network to which the plurality of transmitting/receiving units are connected to form a communication channel between the two transmitting/receiving units, and a switch network for forming a communication channel between the two transmitting/receiving units. A modulation/demodulation section connected between the switch network and a control section described later and modulating/demodulating connection control signals, and a communication channel between the two transmitting/receiving sections controlling the switch network; 1. A wireless circuit switching device comprising: a control section that forms a connection control channel between a transmitting and receiving section.