JPS5829231A - Calling system of radio communication system - Google Patents

Abstract

PURPOSE:To eliminate the need for a subordinate office operator to wait until a free channel is captured by temporarily storing a dial number at each subordinate office for subordinate office calling, and transmitting the dial number after a free channel is captured. CONSTITUTION:A subordinate office SS has a master telephone set TEL1, a subordinate telephone set TEL2, and a private branch exchange PBX. When a telephone set TEL sends an off-hook signal, a dial tone is supplied from a signal generating circuit SG, and dial origination is performed, dial pulses are discriminated by a control circuit CTC and when they show an office number other than its number, a calling control signal is generated immediately and the dial signal is stored in a memory successively. Once the calling control signal is generated, a free channel is captured by detectong a free line signal to transmit a call signal to a master office over the channel, and a break of the free line signal which corresponds to the call signal is confirmed to transmit said stored dial signal to the master office.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a calling method in a cyclically irregular multi-channel wireless communication system.

Such an overconfidence system is commonly used in administrative wireless communications, etc., and generally has a configuration shown in the block diagram 11a.

In other words, the master station M8 is connected to a broadcasting switch (hereinafter referred to as switch 411).
) IX and a line control device NCl1 are provided, and are connected to a plurality of slave stations mst to mfln through a plurality of channels CHI to C-, which are simplified and shown by @ in the diagram.

Actually, each channel C11l to CHn is constituted by the transmitter/receiver of each station Ms11111-gall and radio waves of mutually different frequencies.

Further, each slave station 11jit to 1llllntl and a selector sit.

Control part C! And a phone for the terminal? IL has set up a foot,
The idle line signal transmitted from the common control unit CCV to the empty channel is sent to the terminal station Sat~1111<) via the channel units CUI~CUn provided in the line control a device NCK for each channel CII~CHn. At the same time, each channel Cl1m to C1m is detected by the selector 1llL.
When making a call from the telephone 'rlcL, based on the control operation of the control unit CTE, the empty channel where the empty line signal is detected is captured by the selector IILK, and the It appears to be used to send dialed numbers, etc.

However, in the conventional system, after capturing an empty channel, the dial tone sent from the exchange [CX] is transmitted to the telephone T.
It is not possible to make a dial call until the number of calls is received from ICL K. If you make a dial call by mistake before this time, the exchange [CX] may malfunction and there is a risk of an incorrect connection. This method has disadvantages such as the long time it takes to acquire an empty channel.

The present invention has the objective of fundamentally solving the drawbacks of the conventional technology.When a call is made from each slave station, the dial number is temporarily stored in each slave station, and after acquiring an empty channel,
The memorized dial number is transmitted through an empty channel, and the present invention provides an extremely effective calling method for a wireless communication system in which handling is greatly reduced.

Hereinafter, the present invention will be explained in detail with reference to FIG. 2 and subsequent figures showing embodiments.

FIG. 2 is a block diagram of the slave station slS, and FIG. 3 is a block diagram of the master station Ml.
Is there a timing chart showing the operating status of slave station I and slave station ■? ]CI, 1, child phone TIL,
are provided, and are connected to each other and to the private branch exchange IIx via the connection circuit LC, and to the radio TRX via the dial relay circuits DI and IIYI.

In addition, there is a control circuit CTC consisting of an i microprocessor, memory, etc., which stores various information and controls each part. When a call is made, the connection circuit LC detects this and sends this information to the control circuit C
The same circuit CTC gives a command to send a dial tone to the signal generating circuit 8G, and the signal generating circuit 8G
Dial tone D〒 from the telephone via the connection circuit LC!
Sent to IL.

Dial sound D? When a dial call D8 is made by listening to the dial number, the control circuit CTEC determines the dial pulse corresponding to the dial number via the dial relay circuit DB, and immediately sends a call signal 1c when a station number other than the own station is received. sending out,
The serial number is then stored in the memory within the open circuit CTC for sending out a dialing signal.

On the other hand, the signal from the reception output m1-GUY of the - line machine 〒IK is given to the signal receiver 8 by moxa the buffer circuit IFm, and is shown as reception R in Fig. 3. If the receiver S
Since it is given from l& to the control circuit CTC, the same path CT
C is the radio device RX according to the discrimination information from the connection circuit LC.
, fix the selector to the channel where the empty line signal was detected on the 8th, and capture the empty channel.

In addition, in response to the detection of the idle line signal set 1, the control circuit CteC gives a command to the eight signal transmitters to send out the calling signal Ic, and the buffer circuit IFt4C also gives a command,
In order to turn this on, the calling signal 1c is transmitted to the radio TI.
The signal is sent to the transmitting power i/IN of X, and is transmitted to the master station Ml over an empty channel, as shown as send lli in FIG.

When this is received at the master station Ml, the line controller M
CI performs detection and blank signal 1 by Il scissor channel
In order to cut off the transmission of wi, the control circuit CiC of the slave station ■ generates a dial signal @D.
At the same time as activating the dial signal generator DO, a tone signal corresponding to the dial number is generated from the dial signal generator DO in order to send out the called station number and the subsequently received telephone number from the stored memory. and is transmitted as a dialing signal Im via the radio wing X over the air channel.

In the master station Ml that received this, the common control unit CC!
decodes the dial signal 1i+, controls the channels corresponding to the channel in the channels Cu and ~Cun, causes the connection to the dial 1ilDI of the exchange EX, and causes the dial 1i+ to be switched on and off. At the same time, in order to notify the slave station II of the reception of the calling signal 8C, a collation signal 11 to which the honor code information of the slave station 18 determined based on the calling signal 8C is added is transmitted over the shouting channel.

Slave station B that detected the verification signal Imp by the signal receiver 8 blades
If the control W circuit CTC responds and the terminating telephone 'rlL is on-hook, B controls the signal generation circuit go and the connection circuit LC, and sends out a ringing signal from the signal generation circuit 8G. It is announced that the p11 line configuration has been completed with Kai Station Group I.

The exchange Icx responds to the dial pulse DP, an exchange connection is established with the called party, and if the called party responds by off-hook FH, the control line CL is supplied from the exchange code x. , this is the channel enit Cυ1~
The signal is sent to the common control unit OCT via the channel corresponding to the channel in CUn, and the control unit OCT transmits the called party response signal 8m via the channel.

Then, this is detected by the signal receiver 81, and the control circuit CTC controls the connection circuits I, C and the buffer circuit BFT, and in order to complete the communication circuit, a communication TI is performed between the telephone TICL and the called party. .

When the call ends and on-hook NH is performed, the connection circuit LC detects this and sends this information to the control circuit CTC.
The same circuit CTC controls eight signal transmitters to send recovery signal set I to the channel in use! and sends a recovery signal BBm.

The common control unit CCte detects this, and the kill edge DL
In order to cut off the ground air transmission to
The CT returns to the initial state by transmitting the idle line signal 8 again on the channel that has been in use.

In the dial relay circuit DIm, a dial signal from the master station Ml is received by the signal receiver (8n) and identified by the control unit -〇TC, and the dial pulse is transmitted to the connecting circuit in accordance with the signal from the control circuit. It also has a function to send calls to the LC, and it is also possible to receive calls from the master station M8 to each telephone via the private branch exchange PBX.

Therefore, when making a call from the slave station 8S side, there is no need for the operator to wait until an empty channel is captured, and after dialing, an exchange connection is automatically performed by capturing an empty channel. This not only prevents incorrect connection of the exchange NX, but also greatly facilitates operation.

However, each signal exit is $11% ICX8D%! IIF1
! As IA, 1as, etc., a frequency deviation signal, a metal frequency signal, or a pulse modulation signal may be used depending on the transmission characteristics of the radio device IX, and as a control circuit CiC, it is configured by a combination of logic circuits. The same goes for using things.
Signal transmitter BT and dial signal generator DO according to conditions
The present invention can be freely modified in various ways, such as by using a walking stick, a telephone (IL1), and a telephone (L3).

As is clear from the above explanation, according to the present invention, erroneous connections of the viewing exchange are prevented, there is no need to make repeated calls, line operation efficiency is improved, and the operator at the single station is It is not necessary to wait until an empty channel is acquired when making a call, which is very convenient in operation, and a remarkable effect can be obtained in a cyclic non-locating multi-channel type untethered communication system for various uses.

[Brief explanation of the drawing]

Figure 1 shows circulatory mislocation! FIG. 2 is a block diagram showing the configuration of the multi-channel system; FIG. 2 is a block diagram of a slave station showing an embodiment of the present invention; FIG. 3 is a timing chart showing the operating status. Mll e @ @ a master station, 88. Pull 1l-111n
・""Slave station, am, ~cm snow, self, 9 channels, I
8x--fist exchange (relay exchange), cc'r...
Common control unit, CU, ~CU! l...channel unit), SEL...selector, TBX...proboscis radio,
IIm...Signal receiver, IBT...Signal transmitter, DG...Dial signal generator, c'rc...
Control circuit, DI/display/dial relay circuit, LC...
・Connection circuit, Ding ELI...Main phone, Ding KL,...
・Slave phone. Patent applicant: Hitachi Electronics Co., Ltd. gold wire agent Masaki Yamakawa (1 person)

Claims (1)

[Claims] A plurality of channels using radio waves of mutually different frequencies are used between the parent bird and multiple slave stations, nb, gui station, and each slave station, and an aerial signal transmitted from the parent station via an empty channel is used. In a wireless communication system using a cyclic non-locating multi-channel method in which each slave station detects and captures an empty channel among the channels, a dial number is memorized in each slave station when a call is made from each slave station. , Immediately after receiving it at the call station, it captures the empty channel by detecting the empty line signal, transmits a calling signal to the empty channel, and transmits the empty line signal in response to the calling signal. A calling method for a wireless communication system, characterized in that the stored dial number is transmitted through the captured empty channel after confirming that the call has been disconnected.