JPS63314925A - Radio telephone equipment - Google Patents

Abstract

PURPOSE:To obtain a low cost radio telephone equipment by transmitting and receiving a control signal in a time slot different from a time slot for controlling between a radio telephone set and a wireless connection equipment in a mutually adjacent radio zone in the radio telephone set and wireless connection equipment. CONSTITUTION:The control signal between the radio telephone set RTEL for forming the speech path of the RTEL and the wireless connection equipment CE is transmitted and received in the time slot different from the time slot for controlling the radio telephone set and the wireless connection equipment in the adjacent radio zones Z1-Zn. Thereby, the control cannel of the same frequency can be used in all the radio zones Z1-Zn, so that wireless connection equipment of the same constitution can be disposed in all the radio zones and the low cost radio telephone equipment can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wireless telephone device used in cordless telephones, car telephones, and the like.

2. Description of the Related Art In general, wireless connection equipment (cE) that performs wireless communication with wireless telephones (1-L position) such as mobile stations such as cordless telephones and car telephones is placed in each wireless zone, and these wireless connection equipment (cE) A radio line controller (R, CU') is provided to communicate with the radio line controller (RC
A radiotelephone device that performs communication between radiotelephones (R-setup) and communication via central office lines between radiotelephones (R-setup) by connecting a TJ) to an exchange connection device such as a private branch exchange (PBX) or a central office exchange. It has been known.

Similarly, the above-mentioned radio line control device (R, CU) and radio connection device (cg) correspond to a system control station in a car telephone system and a base station of each radio zone, respectively.

Conventionally, this type of wireless telephone device allocates control channels with different carrier frequencies for each wireless zone in order to prevent radio wave interference between adjacent wireless zones, and the wireless telephone of the wireless connection device uses this control channel. The control signal is configured to transmit and receive control signals through the wireless telephone, and to register the position of the wireless telephone, such as a wireless zone, and to perform call origination processing, call reception processing, etc., using the control signal.

The frequency of the carrier of the communication channel is different from the frequency of the control channel, and also differs for each communication channel.

Problems to be Solved by the Invention However, in the above-mentioned conventional radio telephone device, control channels with different carrier frequencies are assigned to each radio zone. Therefore, there are problems in that the device itself becomes expensive and maintenance costs for frequency adjustment become expensive. In view of the above problems, the present invention provides an inexpensive wireless telephone device. The purpose is to

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a control signal between a wireless telephone and a wireless connection device for forming a communication path of the wireless telephone, to a wireless telephone in an adjacent wireless zone. The present invention is characterized in that the control signal is transmitted and received in a time slot different from the time slot in which control is performed between the wireless connection device and the wireless connection device.

Effect The present invention has the above-mentioned configuration, so that a control channel of the same frequency can be used in all wireless zones.
Wireless connection devices with the same configuration can be placed in all wireless zones, making it possible to realize an inexpensive wireless telephone device.

EXAMPLES Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing one embodiment of the wireless telephone device according to the present invention, FIG. 2 is a detailed block diagram of each device of the wireless telephone device of FIG. 1, and FIG. FIG. 4 is an explanatory diagram of each file of the wireless connection device in FIGS. 1 and 2. FIG. 5 is an explanatory diagram of each file of the wireless connection device in FIGS. 2 is an explanatory diagram of each file of the radio telephone device, and FIG. 6 is a timing chart for explaining the operation of the radio telephone device of FIGS. 1 and 2.

In FIG. 1, 11 is a fixed station connected to the existing exchange 10 and controls the entire radio telephone device, and 12□ and 122 to 12n are fixed stations, respectively. They are low-power wireless connection devices (CG) with a communication radius of about 30 to 100 m, and there are a plurality of these wireless connection devices 121, 122 to 12n, respectively. These wireless connection devices 121, 122-12n each constitute one wireless sea 7ZLZ2-Zn, and perform wireless communication with the wireless telephone (R location) 13 located in the wireless zone.

Wireless zones zl, z2 to Zn are wireless line controllers 11
The wireless service area is controlled by
When a caller using 3 as a mobile phone (in the case of a cordless phone) is located within this service area, communication with other wireless telephones 13 is performed via the wireless line control device 11 and the wireless connection devices 121, 122 to 12n. It is configured to be able to communicate via a network or central office line.

The wireless line connection device 11 is connected to the existing exchange IO via the same number of telephone lines as the number of wireless telephones 13, and is connected to each wireless zone z1. Wireless connection device 121 in z2 to Zn
, 12z to 12n are arranged in a number that is a fraction of the number of wireless telephones 13, depending on the busy hour traffic and the call loss rate.

Next, detailed configurations of the radio line control device 11, each radio connection device 12, and each radio telephone 13 will be explained with reference to FIG.

In the wireless line control device 11, 110 is a control unit that controls the entire wireless line control device 11, and this control unit 110 includes a microcomputer (CPU) and a CPU.
A ROM (read-only memory) that stores the U execution program and a RAM that has a CPtJ work area, etc.
(random access memory).

1111 to 111N are office line interfaces to which telephone lines are connected, 112 is a tone trunk that generates various tone signals, 1131 to 113m are radio line interfaces to be connected to each wireless connection device 121 to 12n, respectively; 114 is the central office line interface 1
This is a matrix switch for connecting 111 to 111N, tone trunk 112, and wireless line interfaces 1131 to 113m.

Further, as shown in FIG. 3+al, 115a indicates the identification number of this radio line control device 11, that is, the identification number of this system (SMS-ID), the capacity of the system indicating the number of subscribers, and the number of wireless zones n, that is, the wireless connection. This is a system file in which various data such as the number of control stations of the device 12, the number of wireless connection devices 12, and station data of wireless connection devices such as monitoring timer values are stored.

The system file 115a also stores a program for the control unit 120 of the wireless connection device 12, which will be described later, and various data to be stored in the wireless line connection file 125a and station data file 125b, although not shown.

115b, as shown in FIG. This is a subscriber file in which subscriber class data is stored, and the location information is rewritten when the wireless telephone 13 moves between wireless zones.

115C is a station data file in which various data such as the number of each station line and radio line and the line status indicating the installation status of the line are stored, as shown in FIG. 3 (C1).

As shown in FIG.
The line connection file 115f, which stores various data such as the line number with the wireless connection device, the status of calling/incoming calls, and the line connection time, is the number of each wireless zone, as shown in Figure 3. This is a wireless area configuration file that stores various data such as the number of wireless connection devices installed in each wireless zone and the identification number of the wireless connection devices.

116 is a control console on which the operator inputs various data of the files 115a to 115f and displays the monitoring results of the wireless connection device 12, which is a control station. In each wireless connection device 12, 120 is This control unit 120 is a control unit that controls the entire wireless connection device 12.
The system is roughly composed of a microcomputer (CPU), a ROM (read-only memory) in which the execution program of the PU is stored, and a RAM (random access memory) that has a work area for the CPU.

121 is a multi-channel access (MCA) wireless transceiver that performs wireless communication with the wireless telephone 13;
2 is a line interface connected to the radio line control device 11 via a 2-wire (2W) transmission line, a control signal transmitter/receiver for transmitting and receiving control signals to and from the radio line control device 11, and 124 is an audio line interface for the communication line. This is an audio control unit that turns signals on/off, amplifies them, etc.

125a, as shown in FIG. , various control signals with the wireless telephone 13 (wireless side), various control signals with the wireless line control device 11 (wired side), and other various data are stored.

125b, as shown in FIG. 4(b), the identification number (SMS-ID) of the wireless line control device 11, the number of the wireless zone where the wireless connection device is installed, the identification number of the wireless connection device, and the availability. Channel search interval, dial pause time when making an outside line, etc., dial pulse speed (
This is a station data file in which various data such as dial pulse make rate (33 chi, 50% or 66 chi) are stored.

In each radio telephone 13, 130 represents each radio telephone 1
This control unit 130 includes a microcomputer (CPU), an R, OM (read only memory) in which the execution program of the CPU is stored, and a RAM having a work area for the CPU, etc. (random access memory).

131 is a multi-channel access (MCA) wireless transceiver that performs wireless communication with the wireless connection device 12;
Reference numeral 32 indicates various tones corresponding to amplified audio signals of the receiver and microphone of 132a, turning on/off, and calling signals sent from the wireless line control device 11 via the wireless connection device 12. A transmitter/receiver unit 133 generates a signal (voice signal), a dial key for inputting a dial number, etc.; 134a, a handset; a hook switch (SW) 135, which is turned on/off by off-hook/on-hook 132a; Location registration button 136 L for registering location information such as the wireless zone where the wireless telephone 13 is located in the subscriber file 115b of the wireless line control device 11 Dial signal method for the existing exchange 10 (PB double signal is DP double signal This is a PB/DP changeover switch (SW) for selecting.

138a, as shown in FIG. 5+a), the connection state of the wireless telephone, the number of the connected wireless connection device 12, the system number (SMS-ID) of the connected wireless line control device 11, and the wireless This is a wireless line connection file in which various data such as a connection sequence with the connection device 12 and a control signal with the wireless connection device 12 are stored.

138b is a wireless telephone ID file in which the identification number (R-ID) of the wireless telephone 13 is stored, as shown in FIG. The number of the wireless zone where the telephone 13 is located (
Wireless zone number file in which location information) is stored, 13
8d is a speed dial file in which speed numbers and dial codes are stored in correspondence, as shown in FIG. 5 (fd);
138e is a dial file in which a dial code corresponding to the dial number inputted last time using the dial key 133 is stored, as shown in FIG.

The members 130 to 138e are housed in a portable casing in the case of a cordless telephone, and in a casing that can be installed in a center console or the like of a car in the case of a car phone.

Control unit 1 of the wireless connection device 12 and each wireless telephone 13
20 and 130 each have a timer function, and in order to prevent interference between adjacent zones, they transmit and receive control signals in predetermined time slots of a control channel of one frequency, and use these control signals to register locations and make calls. Or it is programmed to handle incoming calls, etc.

FIG. 6 shows the control channel in three time slots A,
Divide into time slots A and B.

C to wireless zone Z3 +t, Z3 to +-2 respectively
, Z3 are assigned to a group of +3 (K=0.1, 2→). In this case, radio zones of the same time slot are set not to be close to each other to prevent interference.

Next, the operation of the embodiment according to the above configuration will be explained.

(1) Location Registration from Wireless Telephone 13 First, the operation when registering the wireless zone in which the wireless telephone 13 is located will be explained.

When the location registration button 135 of the wireless telephone 13 is pressed, the control unit 130 turns on the wireless transceiver 131, and uses the control sequence and control signal of the wireless line connection file 138a to input the location registration button number and the wireless telephone ID. A signal of the identification number of the wireless telephone 13 stored in the file 138b is generated and transmitted via the wireless transceiver 131 at a predetermined time slot.

This signal is received by the wireless connection device 12 of the control station in each wireless zone via each wireless transmitter/receiver 131 at different levels depending on the wireless zone in which the wireless telephone 13 is located. The control unit 120 encodes the reception level of the signal from the wireless telephone 13, closes the transmission path with the wireless line connection device 11 according to the control sequence of the wireless line connection file 125a, and transmits the above-mentioned location registration request signal and identification number. The reception level code is transmitted to the wireless line connection device 11 via the control signal transmitter/receiver 123 and the line interface 122, and a loop is opened.

Here, the reception level is, for example, 20 dB or less, 20 to 4
QdB, 40-60dB, 60dB or more, respectively.
It is encoded into 2-bit data of "00", [01], "10", and "11". Of course, if the signal is encoded into 3 bits or more, the reception level can be differentiated into 8 or more levels.

When the control unit 110 of the wireless line connection device 11 receives the position registration request signal, identification number, and encoded data indicating the reception level via the wireless line interface 113, it decodes the reception level from the descendant wireless connection device 12. compare.

The control unit 110 selects the identification number (location information) of the wireless zone with the highest reception level, and stores the selected location information in the location information storage area of the subscriber file 125b.

If the compared reception levels are the same, registration is performed based on a predetermined priority order, such as registering the lowest or highest number, or the number of the wireless zone or wireless connection location 12 entered first or last. You can also
Register the numbers of wireless zones etc. in descending order of reception level,
If the wireless connection device 12 with the highest reception level is in communication at the time of the call, the call may be sequentially made via the wireless connection device 12 with the lower reception level.

The control unit 110 inverts the line voltage as described above (when the location registration is completed) and sends the location registration completion signal to the wireless connection device 12 that has received the extremely high level signal. In this case, the location registration completion signal is , is not sent to any wireless connection device other than the wireless connection device that received the maximum level signal.The wireless connection device 12 that received the location registration completion signal converts this signal and the number of the wireless zone concerned into a wireless signal, and Radiotelephone 1 at a predetermined time slot assigned to a radio zone.
Send to 3.

The wireless telephone 13 sends the location registration completion signal to the handset 1.
32a's receiver or speaker, or by blinking a light emitting diode, etc., and also informs the caller of the wireless zone identification number of the wireless connection device 12 that sent the response, that is, the location registration completion signal. It is registered in the wireless zone number file 138C.

Next, the wireless telephone 13 sends a location registration confirmation signal to its wireless connection device 12 in the time slot of the radio zone, and the wireless connection device 12 sends its location registration confirmation signal to the radio line controller 11, and the wireless Line control device 11
depoles the loop.

It should be noted that from the wireless connection device 12 described above to the wireless line control device 11
Instead of sending a special signal, the location registration request signal may be notified by opening/closing a track loop. Further, the location registration completion signal from the radio line control device 11 to the radio connection device 12 may also be notified by reversing the line voltage, or the radio telephone 13 may be notified directly by a tone signal or by transmitting this tone signal as a code signal. It may also be sent.

Therefore, in the above embodiment, various control signals for location registration between the wireless connection device 12 and the wireless telephone 13 are as follows:
It is transmitted in predetermined time slots that do not cause interference with neighboring zones.

In this embodiment, the location is registered using the location registration button 135 of the wireless telephone 13, but instead, the wireless connection device 12, which is a fixed station, transmits location information indicating each wireless zone to the wireless zone. The radio telephone 13 monitors this location signal to determine the radio zone in which it is currently located, and automatically sends a location registration request signal and location information in the time slot of the radio zone when moving between radio zones. The configuration may be such that the wireless network controller 11 transmits the identification number and registers the location information in the subscriber file 115b.

(2) Receiving a call to the radio telephone 13 Next, the operation when receiving a call to the radio telephone 13 via the radio line control device 11 will be explained.

When a call arrives at, for example, extension 13
Access 10.

The control unit 110 reads the wireless zone in which the wireless telephone (13X1) is located from the subscriber file 115b, and sends the wireless telephone (13X1) identification number and the call control signal to the control station of the wireless connection device 12 located in the wireless zone. Send. In this case, the control unit 110 controls the matrix switch 114 to connect the wireless line interface 113 corresponding to the control station of the wireless connection device 12 in the wireless zone to the station line interface 11 that received the call.
Connect 1.

The control unit 120 of the wireless connection device 12 receives the above call signal etc. via the line interface 122 and the control signal transmitter/receiver 123, and stores the wireless line connection file 125a.
Wireless radio telephone (13X1
) and a call control signal (incoming call signal) are generated and transmitted via the wireless transceiver 121 in the time slot of the wireless zone.

The radio telephone 13 receives the identification number signal of the radio telephone (13X1) and the call control signal (incoming call signal) via the radio transceiver 131, and compares the received identification number with the identification number of the radio telephone ID file 138b. However, the control unit 130 of the matching wireless telephone (13X1) generates an incoming call response signal to the wireless connection device 12 and sends it in the time slot of the wireless zone. When the wireless connection device 12 receives the incoming call response signal from the wireless telephone (13X1), it generates a signal specifying a communication channel to the wireless telephone (13X1), and transmits the signal in the time slot of the wireless zone. After switching to the communication channel, the control unit 130 uses the channel to send an interference detection completion signal to the wireless connection device 12 if there is no interference in the channel switching completion signal and the communication channel, and then turns on the transmitting/receiving unit. Make it.

Upon receiving the channel switching completion signal and the interference detection completion signal from the radio telephone 13 , the radio connection device 12 relays the bell ringing signal from the radio line control device 11 and sends it to the radio telephone 13 .

The transmitter/receiver unit 132 of the wireless telephone 13 is connected to the wireless connection device 12
The call control signal from the voice signal for the call (
generate a bell sound).

Therefore, the calling signal from the existing exchange 10 is sequentially output in the form of a specific signal to the control station of the wireless connection device 12 via the radio line control device 11, and is transmitted from the wireless connection device 12 to the wireless telephone (13Xl). .

When the wireless telephone ( 13 Control unit 12 of wireless connection device 11
0 establishes a communication path between the calling side telephone and the wireless telephone (13Xi) by turning on the voice control section 124.

In this case, the control unit 110 of the wireless line control device 11 sets the wireless connection device that was the control station as the communication station (communication channel), and sets the other wireless connection device that was an empty channel to the control station of the wireless zone. Set.

(3) Calling from the radio telephone 13 Next, the operation when making a call from the radio telephone 13 to a central office line or another radio telephone 13 will be explained.

When the wireless telephone 13 is off-hook, the hook switch 13
4 is turned on, the control unit 130 generates a calling signal based on the connection sequence and control signal of the wireless line connection file 135, and also generates the identification number of the wireless zone in which the wireless zone number file 138C is currently located. and add
It is transmitted via the wireless transceiver 131 at predetermined time slots.

The control unit 120 of the control station of the wireless connection device 12 in each wireless zone compares the received wireless zone identification number with its own wireless zone identification number in the station data file 125b, and selects the control station with the matching identification number. Control unit 120
generates a call response signal and a signal specifying a communication channel for the radio telephone 13, and sends them out in the time slot of the radio zone.

When the control unit 130 of the wireless telephone 13 switches to a communication channel and sends a channel switching completion signal using the channel, the wireless connection device 12 closes the loop with the wireless line control device 11 and When the control unit 130 of the telephone 13 sends out an interference detection completion signal when there is no interference in the communication channel, the wireless connection device 12 sends a calling signal to the radio line control device 11. When receiving the calling signal, the radio line control device 11 closes the subscriber line with the existing exchange 10 and sends the calling signal to the existing exchange 10.

Next, the control section 110 of the radio line control device 11 sends a call response signal to the wireless connection device 12, and the wireless connection device 12 turns on the audio control section 124 and sends an audio circuit activation signal to the wireless telephone 13. Send. Wireless telephone 1
The control section 130 of No. 3 turns on the transmitter/receiver section 132 in response to the audio circuit activation signal.

Therefore, the dial tone sent from the existing exchange 10 to the wireless telephone 13 via the closed loop is reproduced as audio by the receiver of the handset 132a, and the calling party can be aware of the closed loop with the existing exchange 10.

Next, when the dial number is input from the dial key 113, the control unit 130 of the wireless telephone 13 converts it into a dial code and sends a signal indicating the dial signal method set by the PB/DP changeover switch 136 (for example, PB
A double signal rOJ and a double signal DP (“1”) are added thereto and sent to the wireless connection device 12.

The wireless connection device 12 converts the dial code into a dial signal of the DP signal system or the PB signal system using a signal indicating the dial signal system, and sends it to the existing exchange 10 via the above-mentioned closed loop. The existing exchange 10 sends a ringback tone to the wireless connection device 12 via the closed loop,
The wireless connection device 12 converts the ringback tone into the wireless signal and sends it to the wireless telephone 13, and when the called telephone responds, a call is established.

In this call state, the wireless connection device 13 becomes the calling station (call channel), and the other wireless connection device 13 becomes the control station in that wireless zone, as in the case of incoming call described above.

However, in this embodiment, all the wireless connection devices placed in one wireless zone are configured to be set as the control station in turn, but instead, one of the wireless connection devices placed in the wireless zone is set as the control station. One wireless connection device may always be set as the control station, and the other wireless connection device may always be set as the communication station.

DETAILED DESCRIPTION OF THE INVENTION As described in the detailed description of the invention, the present invention provides a time slot for controlling the communication between a wireless telephone and a wireless connection device in an adjacent wireless zone to form a communication path for the wireless telephone. Since the configuration is configured so that control signals are transmitted and received in a time slot different from the time slot used for control between It is possible to realize an inexpensive wireless telephone device that can be placed in a wireless zone.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the wireless telephone device according to the present invention, FIG. 2 is a detailed block diagram of each device of the wireless telephone device of FIG. 1, and FIG. Figure 4 is an explanatory diagram of each file of the radio line control device in Figure 2 and Figure 1.
FIG. 5 is an explanatory diagram of each file of the wireless connection device in FIGS. 1 and 2, FIG. 6 is an explanatory diagram of each file of the wireless telephone in FIGS. 1 and 2, and FIG. 2 is a timing chart for explaining the operation of the wireless telephone device of FIG. 11...Radio line control device, 12...Wireless connection device, 13...Wireless telephone, 110.120.130...
- Control unit, 114... Matrix switch, 115
a... System file, 115b... Subscriber file, 115 e... Line connection file, 12
1.131...Radio transceiver, 125a, 138a
...Wireless line connection file, 125b... Station data file, 138b... Wireless telephone ID and aisle,
138C...Wireless zone number file. Name of agent: Patent attorney Toshio Nakao (3rd person)
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Claims (1)

[Scope of Claims] A wireless connection device is provided that is placed in a different wireless zone and performs wireless communication with a wireless telephone located in the wireless zone, and the wireless telephone and the wireless connection device are mutually connected to each other in an adjacent wireless zone. A radio telephone device, characterized in that a communication path for the radio telephone is formed by transmitting and receiving control signals in a time slot different from a time slot for controlling between the radio telephone and a wireless connection device.