JP2000004477A - Radio telephone communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the radio telephone communication system that can inform an incoming call signal to a portable telephone set after movement even when the portable telephone set moves to other radio group before the portable telephone set receives the incoming call signal after a line controller sends the incoming call signal. SOLUTION: When a portable telephone set moves from an area 4b of a radio group to an area 4c of the radio group, after a line controller 1 sends an incoming call signal 7, before a portable telephone set(PS) 3b receives the incoming call signal, after the line controller receives a position information signal 8 of the radio group from the portable telephone set (PS) 3b, a position information management table 151 is updated and again the controller 1 sends the incoming call signal 7 to the portable telephone set (PS) 3b via a base station (CS) 2c of the radio group after the movement again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone communication system, and more particularly to a portable telephone termination service in a radio telephone communication system.

[0002]

2. Description of the Related Art As a conventional wireless telephone communication system, a plurality of base stations connected to a line controller are allocated to a wireless group, and the position information of a mobile phone is stored in a memory of the line controller in wireless group units. When managing and sending the incoming signal to the mobile phone, the incoming signal is sent to the base station assigned to the wireless group of the location information of the mobile phone stored in the memory of the line control device, and the received base station is transmitted by the wireless system. 2. Description of the Related Art There is a system that sends an incoming signal and notifies a mobile phone of an incoming call.

In these conventional systems, after a line controller sends out an incoming signal and before the mobile phone receives the incoming signal, a person holding the mobile phone moves and stores it in a memory in the line controller. If the mobile phone moves to a wireless group different from the current location information, the mobile phone cannot receive the incoming signal, which may cause a problem that the mobile phone cannot be notified of the incoming signal.

[0004]

As described above, in the conventional system, after the line controller sends an incoming signal and before the mobile phone receives the incoming signal, the person holding the mobile phone moves due to movement or the like. If the mobile phone moves to a wireless group different from the position information stored in the memory in the control device, the mobile phone cannot receive the incoming signal, so that there may be a problem that the mobile phone cannot be notified of the incoming signal.

Therefore, the present invention eliminates this problem, so that even after the line control device sends out an incoming signal and before the portable telephone receives the incoming signal, it moves to another wireless group, even if it moves to another wireless group. An object of the present invention is to provide a wireless telephone communication system capable of notifying a telephone of an incoming signal.

[0006]

A radio telephone communication system according to the present invention comprises a base station belonging to one of a plurality of radio groups, a portable telephone connected to the base station by a radio system, and a base station. In a wireless telephone communication system having a line controller connected to a wired line and controlling a base station and a mobile phone, after notifying, as a position information signal, a wireless group of a base station to which the mobile phone currently belongs, the line controller Position information storage means for storing the position information of the mobile phone, and position information searching means for searching the wireless group of the base station to which the mobile phone currently belongs to as the position information from the position information storage means when sending an incoming signal to the mobile phone. Via the base station assigned to the wireless group of the location information selected by the location information searching means. Signal transmission means for transmitting an incoming signal to the mobile phone after the incoming signal is transmitted to the mobile phone and before the mobile phone receives the incoming signal. When the apparatus receives a position information signal from a base station different from the wireless group of the position information stored in the position information storage means, the position information stored in the position information storage means is updated, and then the position information search means Through a base station that searches for location information and assigns it to the new location information wireless group,
It is characterized by sending an incoming signal to a mobile phone.

[0007] With this configuration, after transmitting the incoming signal to the mobile phone, the mobile phone quickly moves between the wireless groups and notifies the mobile phone of the incoming signal even when the wireless group to which the mobile phone belongs changes. You can do it.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the following drawings, the same symbols indicate the same or corresponding parts. FIG.
FIG. 1 is a diagram showing a system configuration of an embodiment when the present invention is applied to a digital cordless telephone for business use.

In FIG. 1, a business-use digital cordless telephone provided at a business establishment 101 is a public network 10.
0, a plurality of base stations (CS) 2a to 2m connected to the line control device 1 connected to the line control device 1 via a plurality of office lines (subscriber lines), and the base station. (CS) 2a to 2m and a plurality of mobile telephones (PS) 3a to 3n connected via a wireless line. 4a to 4m are base stations (CS) 2a
Area of each wireless group covered by ~ 2m, 5a ~ 5
m is a cable connecting the line controller 1 and the base stations (CS) 2a to 2m.

First, the line control device 1 mainly includes a trunk circuit 11, a switching unit 12, a line circuit 13, and a main control unit (C.
C) It consists of 14, a memory 15, and a data highway 16. A trunk line is connected to the trunk circuit 11 and detects a call signal from the trunk line and has a function as a so-called trunk line interface.

The line circuit 13 is connected to base stations (CS) 2a to 2m on the extension side, and calls the base stations (CS) 2a to 2m from a central office or from an extension. When there is a call, a down control signal indicating an incoming call is sent, or when an outgoing request is made from the base stations (CS) 2a to 2m, an up control signal to that effect is sent to the main control unit (CC) 1
4 to send.

The switching unit 12 connects the trunk circuit 11 and the line circuit 13 to enable communication between extension lines or between extension lines and outside lines. The main control unit (C.
C) 14 controls the trunk circuit 11, the switching unit 12, the line circuit 13 and the like via the data highway 16 based on the operation program stored in the memory 15.

The memory 15 stores various data necessary for the control of the main control unit (CC) 14, and a position information management table 151 for storing position information of the portable telephones (PS) 3a to 3n. Having.

Next, the configuration of each of the base stations (CS) 2a to 2m will be described with reference to FIG. FIG. 2 is a schematic block diagram illustrating a configuration of the base station (CS). In the figure, 21 is an antenna, 22 is a radio unit, 23 is a modem unit, 24 is a channel codec unit, 25 is an interface unit serving as an interface with the line controller 1, 26 is a memory unit, 27
Is a control unit, and 28 is a display unit (LCD).

The radio section 22 includes a switch (SW) 221 for temporally switching a transmission / reception system, a reception section 222, a transmission section 223, a synthesizer 224, and an oscillator 225.

The receiving section 222 converts the frequency of the radio frequency signal received by the antenna 21, amplifies the signal, extracts a signal component, and outputs the signal component to the modem section 23.
The transmission section 223 converts the transmission output signal input from the modem section 23 into a high-frequency signal, and supplies the high-frequency signal to the antenna 21 for transmission. The synthesizer 224 uses the oscillation frequency of the oscillator 225 to transmit a desired frequency. A signal is generated and supplied to the receiving unit 222 and the transmitting unit 223.

The modem unit 23 includes a demodulation unit (not shown) and a modulation unit (not shown). The demodulation unit demodulates the reception signal output from the reception unit 222 of the radio unit 22 to obtain a signal component. The modulation unit outputs the transmission signal output from the channel codec unit 24 to the quadrature phase modulation, for example, π / 4 shift QPSK (Quadrature Phase S).
(high keying) and supplies the modulated signal to the transmission unit 223 of the radio unit 22.

As for the channel codec unit 24,
It comprises a TDMA decoding unit (not shown) and a TDMA encoding unit (not shown). Among them, the TDMA decoding unit outputs a signal (TD) output from the demodulation unit of the modem unit 23.
An MA (signal based on a time division multiple access) communication system is extracted from a pre-allocated time slot and output.
5, the PCM-modulated output signal is inserted into a time slot assigned to a signal according to the TDMA communication method in advance and output to the modulation unit of the modem unit 23.

The interface unit 25 includes ADPCM transcoders 251 and 252 and a PCM codec 25.
3, 254, a cross point switch 255, etc., and under the control of the control unit 27, the line control device 1
The audio signal and the control signal are supplied to the channel codec unit 24 as PCM signals, or the decoded signals from the channel codec unit 24 are supplied to the exchange as PCM signals.

The memory unit 26 is for holding data, and has its own system ID (CS-ID) for identifying a connectable base station (CS). A mobile phone (P) set for each mobile phone (PS) to identify each mobile phone (PS)
Each password such as the individual ID (PS-ID) of S) is stored.

The control unit 27 controls each component, and in addition to the necessary control for transmission and reception, the memory unit 26
Of the personal identification number stored in the personal identification number storage area of the personal computer and the received personal identification number to control the collation of the personal identification number necessary for the verification of the connection control between the base station (CS) and the mobile phone (PS). I do.

Next, the configuration of each of the portable telephones (PS) 3a to 3n will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration of the mobile phone (PS). In the figure, 31 is an antenna, 32 is a radio section, 33 is a modem section, 34 is a channel codec section, 35 is a communication section, 36a is a transmission section (microphone) for converting voice into a voice signal, and 3
Reference numeral 6b denotes a receiving unit (speaker) for outputting an audio signal, 37 a control unit, 38 a memory unit, 39 a sounder for generating various signal sounds, 40 an operation unit, and 41 a display unit.

The radio section 32 includes a switch (SW) 321 for temporally switching the transmission / reception system, a reception section 322,
A transmission unit 323, a synthesizer 324, and an oscillator 325
And

The receiving section 322 converts the frequency of the radio frequency signal received by the antenna 31, amplifies the signal, extracts a signal component, and outputs the signal component to the modem section 33.
The transmission unit 323 converts the transmission output signal input from the modem unit 33 into a high-frequency signal, and supplies the high-frequency signal to the antenna 31 for transmission. The synthesizer 324 obtains a required frequency from the oscillation frequency of the oscillator 325, and
2 and the transmission unit 323.

The modem unit 33 includes a demodulation unit (not shown) and a modulation unit (not shown). The demodulation unit demodulates the intermediate frequency signal output from the reception unit 322 of the radio unit 32 to convert the signal component. The modulation unit fetches a reception signal from the radio unit 32 and outputs the fetched signal to the channel codec unit 34. The modulation unit quadrature-phase modulates the transmission signal output from the channel codec unit 34, for example, π / 4. Shift QPSK (Quadrature Phase Sh)
If Keying) modulation is performed, and this is given to the transmission unit 323 of the radio unit 32.

The channel codec section 34 has a TDMA
It comprises a decoding unit (not shown) and a TDMA encoding unit (not shown). Among them, the TDMA decoding unit demodulates and outputs a signal (TDMA (Time Division Multiple Access) communication) from a demodulation unit in the modem unit 33. Signal by method)
From the time slot assigned in advance, and outputs the same.
The signal output by PCM modulation is inserted into a time slot previously allocated to a signal according to the TDMA communication method and output to the modulation unit of the modem unit 33.

The communication unit 35 is an input / output interface for signals in the audio signal band. The communication unit 35 has an ADPCM transcoder 351 and a PCM codec 352. Under the control of the control unit 37, a transmission unit (microphone)
The PCM modulates the audio signal from the channel codec 36b and supplies it to the channel codec unit 34, converts the demodulated PCM signal from the channel codec unit 34 into an audio signal, and supplies the audio signal to the receiver (speaker) 36a.

The memory section 38 is for holding data, and has a system ID (CS-ID) which is a personal identification number for indicating a connectable base station (CS) and an identification number for indicating itself. ID (PS-
ID) and an extension number, option information, telephone number, company code, and the like assigned by the base station (CS) to the mobile phone (PS).

The control unit 37 controls each component, and in addition to necessary control for transmission and reception, a memory unit 38
Of the personal identification number stored in the personal identification number storage area of the personal computer and the received personal identification number to control the collation of the personal identification number necessary for the verification of the connection control between the base station (CS) and the mobile phone (PS). I do.

The operation unit 40 includes a display unit 41, function keys, and numeric keys. By operating these keys, operations such as calling, answering a call, inputting a dial number, and ending a call are performed. In the office-use digital cordless telephone apparatus configured as described above, the mobile phones (PS) 3a to 3n establish a radio line with the nearest base station (CS), thereby establishing a line with the base station (CS). The control device 1 can communicate with another mobile phone (PS) or another terminal connected to the public network 100.

Further, the portable telephones (PS) 3a to 3n used in this system can directly switch between the portable telephones (PS) 3a to 3n by switching the talk mode to the direct talk mode between transceivers (transceiver mode). It is also possible to make a call by controlling the connection of a wireless line.

Here, the base station (CS) -cellular telephone (P
S) The radio line set between 3a to 3n is RCR-S
The method specified by TD28 is used and 1.9G
A plurality of channels are set in a frequency band of Hz. The use purpose of each wireless channel is determined according to its use. The communication channel for transmitting and receiving each voice and data, the transmission of system information, the outgoing call, the incoming call, the setting of the communication channel, etc. And control channels for transmitting and receiving various control signals.

Each radio channel has a multi-frame configuration, and four channels are time-division multiplexed. Specifically, TDMA-TDD in which four slots for transmission and four slots for reception are time-division multiplexed in each frame, and a transmission slot and a reception slot are temporally multiplexed.
(Time Division Mu1tip1eAc
cess-Time Division Dup1e
x) system, one slot for transmission and one slot for reception.
The slots constitute one wireless channel.

In such a configuration, each base station (C
S) Each of 2a to 2m intermittently transmits system control information at a predetermined interval via a control channel. In such a state, when the mobile phone (PS) is powered on or moves out of the area of the base station (CS), first, the system control information transmitted from the nearest base station (CS) is transmitted. Try to receive. Here, the system control information includes the CS-data set for each base station (CS).
ID is included.

Each portable telephone (PS) compares the received CS-ID with its own stored CS-ID. Here, the reception of the system control information is limited to the matching of the CS-ID in the received system control information with the CS-ID stored in the system control information. In order to prohibit unauthorized access to data, data is destroyed.

The portable telephone (PS) receives the system control information and receives the CS-information of the base station (CS) to which it belongs.
If the system control information including the ID has been continuously received a predetermined number of times, the logical control channel (LCC
Synchronize with the information in H). And mobile phone (PS)
Transmits a position information signal including the CS-ID of the base station (CS) to which the terminal belongs, the extension number DN of the terminal, and the area number AR of the wireless group to which the terminal belongs, and performs position registration. Hereinafter, this logical control channel (LCCH)
, And waits for an incoming call to itself.

A method for setting a radio line set when making or receiving a call in a situation where the base station (CS) and the portable telephone (PS) are synchronized as described above will be described.

First, the base station (CS) is connected to the mobile phone (P
When an incoming call to S) is received, a search is made for a free communication channel, and this communication channel and an incoming call signal are transmitted to the portable telephone (PS). The incoming call signal includes a system call code and a P for designating a mobile phone (PS).
S-ID and extension number DN are included. The mobile phone (PS) that has received the incoming call signal checks whether the communication channel specified by the base station (CS) is available, and if possible, the base station (CS) and the mobile phone (P
S) also switches to the communication channel, and performs subsequent communication.

When a call is originated from a portable telephone (PS), a call signal including a system call code and a CS-ID is transmitted to a base station (CS) through a control channel, whereby the base station (CS) is transmitted. The (CS) side sets a call channel and switches to the call channel to start a call.

Each of the portable telephones (PS) 3a to 3n can select between a normal mode and a direct communication mode between transceivers (transceiver mode). The mobile phones (PS) 3a to 3n can communicate with each other without going through the central office (CS). Also in this case, similarly, each calling mobile phone (PS) transmits a calling signal to each called mobile phone (PS) 3a to 3n using this system call code, and Will wait for a response signal from.

In the digital cordless telephone for business use thus constructed, after the line controller 1 sends an incoming signal to the portable telephone (PS) via the base station (CS), the line controller 1 transmits the incoming signal to the portable telephone (PS). The operation when the wireless group to which the user belongs is changed due to the movement will be described.

For example, as shown in FIG. 4, after the line control device 1 sends the incoming signal 7 to the portable telephone (PS) 3b via the base station 2b, the line control device 1 transmits the radio signal from the area 4b (area number: 2) of the radio group. Group area 4c (area number:
When the mobile phone (PS) 3b moves to the area 4c (area number: 3) of the wireless group, the mobile phone (PS) 3b notifies the line control device 1 of the position information signal 8 via the base station (CS) 2c. . The line controller 1 that has received the position information signal 8 updates the position information management table 151 in the memory 15.

FIG. 5 shows the position information signal 8 and the updated state of the position information management table for managing the position information after the line control device 1 receives the position information signal 8. Here, in the position information signal 8 shown in FIG. 3A, CS is the CS-ID of the base station (CS) to which it belongs, DN is the extension number of the mobile phone (PS) 3b: 0002, and AR is the mobile phone. The wireless area number 3 to which (PS) 3b belongs. In FIG. 2B, reference numeral 151a denotes a position information table before the mobile phone (PS) 3b moves.
b is a position information table after the mobile phone (PS) 3b has moved, and based on the position information signal 8 notified from the mobile phone (PS) 3b, the position information management table 151 in the line control device 1 The location information of extension number 0002 is updated from area number: 2 to area number 3.

Then, the mobile station (PS) 3b after the movement is searched for the wireless group from the updated position information management table, and the base station (CS) 2c assigned to the searched wireless group is searched as shown in FIG. As shown in (1), the line control device 1 sends out the incoming signal 7 again. Mobile phone (P
S) After receiving the incoming signal 7, the base station (CS) 3b
An incoming response signal 9 is transmitted to 2c.

As described above, after the portable telephone (PS) 3b moves to the area 4c of the wireless group, the portable telephone (PS) 3b transmits the incoming call response signal 9, and thereafter, the call processing is performed via the base station (CS) 2c. It is.

In this case, the line controller 1-base station (C
FIG. 7 shows a sequence of signal transfer between S) 2b, 2c and mobile phone (PS) 3b. As shown in the figure, the mobile phone (P) is transmitted from the line control device 1 through the base station (CS) 2b.
S) After transmitting the incoming signal to 3b, the mobile phone (PS) 3b moves to the area 4c of another wireless group and the base station (C).
S) After the line control device 1 receives the position information signal 8 from the mobile phone (PS) 3b via the 2c, the line control device 1
The incoming signal 7 is transmitted again via the base station (CS) 2c,
Upon receiving this, the mobile phone (PS) 3b transmits the signal to the base station (C)
S) Send an incoming call response signal 9 to 2c.

FIG. 8 shows a flow of processing in the line control device 1 of the digital cordless telephone device for business use having such a portable telephone reception service. That is, the line control device 1 sets a 10-second timer (step S1).
Thereafter, an incoming signal 7 is transmitted to the mobile phone (PS) 3b via the base station (CS) 2b (step S2). When the mobile phone (PS) 3b moves to the wireless group to which the base station (CS) 2c belongs before receiving the incoming signal 7, the line control device 1 transmits the position information signal via the base station (CS) 2c. After receiving the position information 8, the position information of the mobile phone (PS) 3b in the position information management table 151 for managing the position information is updated (steps S3, S4, S5), and the incoming signal 7 is transmitted again (step S3). Steps S1 and S2).

However, the line control device 1 is connected to the base station (CS)
After transmitting the incoming call signal 7 via the mobile phone (PS) 2b (step S2) and receiving the incoming call response signal 9 from the mobile phone (PS) 3b, the line controller 1-the base station (CS) 2b-the mobile phone (PS) The state transits to the call state between the terminals 3b (steps S3 and S6). It should be noted that the line control device 1
Before the 0 second timer times out, the mobile phone (PS) 3b
When the incoming response signal 9 and the position information signal 8 are not received, the incoming process is terminated (step S).
3, S4, S7, S8).

As described above, according to this embodiment, after the line controller 1 sends the incoming signal 7, the mobile telephone (PS)
Before 3b receives the incoming signal 7, the mobile phone (PS)
3b, the mobile phone (P) is moved to another wireless group different from the location information stored in the location information management table 151 in the line controller 1.
S) After the line controller 1 receives the position information signal 8 of the wireless group from 3b, after updating the position information management table 151, the base station (C) of the moved wireless group is updated again.
S) Incoming signal 7 to mobile phone (PS) 3b via 2c
Is transmitted to the mobile phone (PS) 3 after the movement.
b can be notified of the incoming signal 7.

[0050]

As described above, according to the wireless telephone communication system of the present invention, after the line controller sends out the incoming signal, the mobile phone moves to another wireless group before receiving the incoming signal. Even in such a case, it is possible to notify the incoming mobile phone of the incoming signal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 shows a base station (CS) according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the configuration of FIG.

FIG. 3 shows a mobile phone (P) according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the configuration of S).

FIG. 4 shows a mobile phone (P) according to an embodiment of the present invention.
The figure for demonstrating the state when S) moved.

FIG. 5 is a diagram for explaining a format of a position information signal and updating of a position information management table according to the embodiment of the present invention.

FIG. 6 shows a mobile phone (P) according to an embodiment of the present invention.
The figure for demonstrating the state after movement of S).

FIG. 7 is a circuit diagram of an embodiment of the present invention;
The figure which shows the sequence of signal transmission / reception between a base station (CS) and a mobile telephone (PS).

FIG. 8 is a flowchart showing a processing flow of the line control device according to the embodiment of the present invention.

[Explanation of symbols]

 100 public network 101 business establishment 1 circuit controller 2a-2m base station (CS) 3a-3n mobile phone (PS) 4a-4m wireless group area 5a-5m cable 11 trunk circuit 12 Exchange unit 13 Line circuit 14 Main control unit (CC) 15 Memory 151 Location information management table 21 Antenna 22 Radio unit 221 Switch (SW) 222 Receiver unit 223 Transmitter unit 224 Synthesizer 225 ... Oscillator 23 ... Modem unit 24 ... Channel codec unit 25 ... Interface unit 251,252 ... ADPCM transcoder 253,254 ... PCM codec 255 ... Cross point switch 26 ... Memory unit 27 ... Control unit 28 Display unit (LCD) 31 ... Antenna 32 Radio section 321 Switch (SW) 32 ... Receiving section 323... Transmitting section 324... Synthesizer 325. 37 ... Control unit 38 ... Memory unit 39 ... Sounder 40 ... Operation unit 41 ... Display unit 7 ... Incoming signal 8 ... Position information signal 9 ... Incoming response signal

Claims (1)

[Claims] 1. A base station belonging to one of a plurality of wireless groups, a mobile phone connected to the base station by a wireless system, and a base station and a mobile phone connected to the base station by a wire line. In a wireless telephone communication system having a line control device, after notifying a radio group of a base station to which the mobile phone currently belongs as a position information signal, the line control device stores the position information as position information of the mobile phone. Means, when sending an incoming signal to the mobile phone, a location information search means for searching a wireless group of a base station to which the mobile phone currently belongs from the location information storage means as location information; Incoming signal transmitting means for transmitting an incoming signal to the mobile phone via a base station assigned to the wireless group of the location information; After sending the incoming signal to the mobile phone by the incoming signal sending unit and before the mobile phone receives the incoming signal, the line control device is moved by a movement between the wireless groups of the mobile phone, When a position information signal is received from a base station different from the wireless group of the position information stored in the position information storage means, after updating the position information stored in the position information storage means, the position information is searched by the position information search means. A wireless telephone communication system for retrieving information and transmitting an incoming signal to said mobile phone via a base station assigned to a wireless group of new location information.