JPS6314598A - Private branch radio communication system - Google Patents

Abstract

PURPOSE:To simultaneously transmit plural signals by using a multiplex radio line in a private branch radio communication system. CONSTITUTION:The sound of the handset 100 of a terminal 10 is digitized 300, the information signal 200 of a terminal 11 is fed to an interface circuit 500 through an interface circuit 400 and the circuits 400, 500 are controlled by a circuit 700. In the circuit 500, a sound, the information and a control signals are multiplexed together with a frame synchronizing signal to constitute one frame. This time division multiplex signal is fed to a terminal radio equipment 600 to modulate a carrier and fed to the radio equipment 20 of a private branch exchange. The signal is demodulated in the radio equipment 20, separated 30 and fed to a switch circuit 40. The control signal is fed to a main control part 50 and the frame synchronizing signal is separated and removed 30. Similarly, the multiplexing signal is transmitted from the radio equipment 20 of the exchange side and the respective signals are received in a terminal telephone set 11, a sound terminal 100 and an information terminal 200. According to such constitution, the signals of a sound and a non-sound systems can be simultaneously transmitted.

Description

[Detailed description of the invention] and a wireless telephone system with a wireless telephone terminal.

[Conventional technology]

Traditionally, private branch exchanges and wireless telephones were connected via wireless lines,
From a wireless telephone via a private branch exchange to an extension telephone, an outside line,
Alternatively, there is known a local wireless telephone system in which calls can be made with other wireless telephones.

[Problem that the invention seeks to solve]

By the way, in the case of a conventional premises wireless telephone system.

When transmitting a voice signal and a non-voice signal (eg, a data signal), there is a problem that the voice signal and the non-voice signal cannot be transmitted simultaneously.

[Means for solving problems]

The present invention provides a local area wireless communication system comprising a wireless terminal device and a private branch exchange connected to the wireless terminal device via a wireless line, which is characterized in that a multiplex wireless line is used as the wireless line. It is.

〔Example〕

Next, the present invention will be explained with reference to examples.

FIG. 1 is a diagram showing an embodiment of the present invention. Referring to FIG. 1, radio telephone terminals 10 and 11 are connected to private branch exchange side radios 20 and 21, respectively, by multiple transmission paths (indicated by broken lines in the figure).

Private branch exchange side radios 20 and 21 are connected to multiplex/branch interface circuits 30 and 31. and,
The multiplex/separate interface circuits 30 and 31 generate and separate two time division multiplexed signals. The multiplex/separate interface circuits 30 and 31 are connected to a time division switch network 40.
and is connected to the main control section 50. The time division switch network 4o is still controlled by the main controller 50.

Next, the configuration of the wireless telephone terminal will be explained with reference to FIG.

The wireless telephone terminal includes a handset 100. data terminal 200,
Audio code/decoder circuit 300. Data terminal interface circuit 400. Multiplex/separate interface circuit 500. and a wireless telephone terminal radio 600.

Here, the operation of the above-mentioned local area wireless telephone will be explained.

When communicating with the wireless telephone terminal 10, an analog voice signal from the handset 100 is converted into a digital signal by the voice encoding circuit 300 and sent to the multiplexing/demultiplexing interface circuit 500. on the other hand.

The data signal from the data terminal 200 is controlled by the data terminal interface circuit 40 by the control circuit 700.
0 to the multiplex/demultiplex interface circuit 500. The multiplex/separate interface circuit 500 is controlled by a control device 700.

In the multiplex interface circuit 500, a time division multiplex signal is generated from the digital audio signal, the data signal, and the control signal from the control circuit 700.

The time division multiplexed signal is an audio signal as shown in FIG.

A data signal and a control signal are multiplexed together with a frame synchronization signal (the frame synchronization signal is generated by the multiplex/separation interface circuit 500) to form one frame. This time division multiplexed signal is then sent to the wireless telephone terminal radio 600, where the transmission wave is modulated with the 2 time division multiplexed signal, and sent to, for example, the private branch exchange side radio 2o via the multiplex radio transmission path. .

The time division multiplexed signal demodulated by the private branch exchange radio 20 is separated by a multiplexing/separating interface circuit 3°.

That is, the audio signal and the data signal are each connected to the signal line 30a.
and 30t+ to time division switch network 40. On the other hand, the control signal is sent to the main control section 50, and the frame synchronization signal is removed by the multiplexing/demultiplexing circuit 30.

Similarly, the audio signal and data signal from the nine time division switch 4o, and the control signal from the main control section 50 are multiplexed by the multiplexing/demultiplexing interface circuit 3o and sent out from the radio device 20. This multiplexed signal is separated into an audio signal, a data signal, and a control signal by a multiplexing/separating interface circuit 500 via a radio device 600. The voice signal is then sent to the handset via the voice encoding/decoding circuit 300, and the data signal is sent to the data terminal 200 via the interface circuit 400. Further, the control signal is sent to the control circuit 700.

In the above-described embodiment, the wireless telephone terminal may include a plurality of data terminals and simultaneously transmit a plurality of data signals.

〔Effect of the invention〕

As explained above, in the present invention, since a multiplex radio line is used as a radio line, a plurality of signals can be transmitted simultaneously, and in particular, voice and non-voice signals can be transmitted simultaneously.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the radio telephone terminal shown in FIG. 1, and FIG. 3 is a diagram showing an example of a multiplexed signal. 10... Radio telephone terminal, 11... Radio telephone terminal. 20...Private branch exchange side radio machine, 21...Private branch exchange side radio machine, 30...Private branch exchange side multiplex/separate interface circuit, 31...Private branch exchange side multiplex/separate interface circuit, 40... time division switch network,
50... Private branch exchange main control unit, 100... Handset, 200... Data terminal, 300... Voice code/decoder circuit, 400... Data terminal interface circuit. 500...Terminal side multiplex/separate interface circuit. 600... Wireless telephone terminal radio device, 700... Control circuit.

Claims (1)

[Claims] 1. A private wireless communication system comprising a wireless terminal device and a private branch exchange connected to the wireless terminal device via a wireless line, wherein a multiplex wireless line is used as the wireless line.