JP2799400B2 - Mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for wireless telephone communication using a small and lightweight portable device.

The present invention enables a portable device to be switched between an indoor mode and an outdoor mode, and performs a charging process on an identification number assigned to the portable device when calling in the outdoor mode.
It expands the area where cordless phones can talk to the outdoors.

[Conventional technology]

FIG. 7 is a block diagram showing a configuration of a conventional cordless telephone system, and FIGS. 8 and 9 are block diagrams showing configurations of a connection device and a cordless telephone, respectively.

The telephone 10 is connected to the connection device 11 wirelessly. The connection device 11 is connected to a rosette 12 which is an indoor connection terminal. A normal fixed telephone 13 is also connected to the rosette 12 in parallel. Rosette 13 is connected to exchange 15 via subscriber line 14.

The connection device 11 includes a transceiver 111, a synthesizer 112, a control circuit 113, and a subscriber line interface circuit 114. The subscriber line interface circuit 114 performs an incoming call signal (16 Hz) detection, a loop detection, and other two-wire line setting control with the exchange 15. This is equivalent to the function of an ordinary fixed telephone. The transceiver 111 is a so-called wireless device. The synthesizer 112 is a local oscillator of the transceiver 111, and sets the transceiver 111 to a predetermined communication channel. Control circuit 113
Controls the operation of the entire connection device.

The cordless telephone 10 has a transceiver 101, a synthesizer 10
2. It comprises a control circuit 103, a transmission / reception circuit 104, and a dial 105. The functions of the transceiver 101 and the synthesizer 102 are the same as those of the connection device 11. The transmission / reception circuit 104 has an interface function of a transmission / reception device. The dial 105 is a part for the operator to dial.

There are various wireless line setting control functions between the cordless telephone 10 and the connection device 11, but the connection device 11 and the cordless telephone 10 are basically positioned equivalent to the fixed telephone 13. Therefore, an incoming call to the cordless telephone 10 from an external telephone is made using the telephone number of the fixed telephone 13 through the exchange 15 and the subscriber line 14. In addition, a call from the cordless telephone 10 is performed in the same manner as a call from the fixed telephone 13.

[Problems to be solved by the invention]

In the conventional cordless telephone system, the cordless telephone is accessed by the subscriber line number and has no unique number, so that it can be used only in the area of the paired connection device, and the connection area is small. In addition, a method (roaming function) that can be used in an area of another connection device is also known, but for this method, a subscriber number corresponding to the parent connection device of the cordless telephone is provided in the network. It is necessary to accumulate a correspondence table with the subscriber line numbers of the area to which the cordless telephone currently belongs. Also in this case, there is a drawback that communication can be performed only indoors, and the area is limited.

In addition, although a car phone service is provided outdoors, a dedicated mobile device is required to use it,
Inexpensive cordless phones do not offer car phone service.

An object of the present invention is to solve the above-mentioned problems and to provide a portable communication system in which a cordless telephone system is extended so that it can communicate outdoors.

[Means for solving the problem]

The portable communication system according to the present invention includes a portable device whose operation mode can be switched between an indoor mode and an outdoor mode, and a first connection unit that connects the portable device in the indoor mode wirelessly to the portable device and the telephone network. In a portable communication system including a second connection unit to which a portable device in an outdoor mode is wirelessly connected, and a line connection unit for connecting the second connection unit to a telephone network,
The portable device includes means for adding an identification number uniquely assigned to the portable device to a call signal when calling in an outdoor mode, and transmitting the call signal, wherein the line connection means includes a call including the identification number. In connection with the signal, the portable device is characterized in that it includes means for performing a billing process in accordance with the identification number independently of the billing process for the connection via the first connection means by the portable device.

(Operation)

The portable device can be switched between an indoor mode and an outdoor mode. In the indoor mode, the portable device operates in the same manner as a normal cordless telephone, and in the outdoor mode, it is exclusively used for calling. The line connection means for connecting the portable device to the telephone network via the wireless connection device, when a call signal including the identification number arrives, that is, when a call is made from the portable device in the outdoor mode, the call signal is transmitted via the call signal. The accounting process is performed not according to the telephone number of the subscriber line connected to the wireless connection device but to the identification number of the portable device.

〔Example〕

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

This system includes a portable device 4, a wireless connection device 3 to which the portable device 4 is wirelessly connected, and a control device 5 and an exchange 7 as line connection means for connecting the wireless connection device 3 to a telephone network.

Here, the feature of the present embodiment is that the portable device 4
The operation mode can be switched between an indoor mode and an indoor mode. When a call is made in the outdoor mode, an outgoing signal is transmitted with an identification number uniquely assigned to the portable device added thereto. When a call signal including a call arrives, connection processing and charging processing are performed in accordance with the identification number.

The portable device 4 has a form in which a conventional cordless telephone is provided with an indoor / outdoor switch, and has a unique identification number (PID) different from a telephone number (subscriber line number). The wireless connection device 3 is equivalent to a conventional cordless telephone connection device. The exchange 7 is a conventional local exchange to which a charging stop function is added. Home memory 2 stores the subscriber information of portable device 4. Specifically, the PID, billing information, subscription information, fee payment information, and the like are stored as a table. Since the portable device 4 in the outdoor mode is only for transmission, there is no need to store the position information of the portable device 4 in the home memory 2. The control device 5 is connected to the exchange 7 by a subscriber line 14,
The connection device 3 is connected by a common line or the like. The home memory 2 is connected to the home memory 2 by a common line. This control device 5
Has a PID detection function, a call switch control function, a home memory control function, a signal exchange function, a two-wire line connection function, and other functions.

The control device 5 is installed, for example, corresponding to the area of the local exchange. Home memory 2 is provided corresponding to control device 5 and stores information on all portable devices in the service area. If the whole of Japan is to be a continuous service area, the home memory 2 needs to store information of all subscribers. The wireless connection device 3 is installed in, for example, a station yard, a hall, an event hall, and the like.

The exchange 7 is also connected to an indoor cordless telephone. This is the same as the conventional one.

In order to clarify the function of the present invention, a connection sequence of a portable device outdoors will be described. There is no location registration and incoming call function because it is only for outgoing calls outside. Therefore, a calling sequence and a call termination sequence will be described.

 FIG. 2 shows a calling sequence.

The portable device 4 transmits a call signal when the operator goes off-hook. This signal is usually in digital form. Third
The figure shows an example of a calling signal format. Reference numeral 61 denotes a preamble, which is necessary for DC drift correction and clock recovery in the connection device 3. As the preamble 61, a repetition pattern of “01” is normally used. 62 is a start code, which is a specific bit pattern used for frame synchronization. 63 is the PID of the portable device. A control type signal 64 is a code corresponding to the call signal when the signal is a call signal. Reference numeral 65 denotes an error control check bit, which normally uses a block code such as a BCH code and generates a PID and control type data using a parity generation matrix.

Upon receiving the call signal, the connection device 3 checks the check bit 65
The signal is transmitted to the control device 5 when the signal is transmitted without error. Since the connection between the connection device 4 and the control device 5 is a wired section, as the signal format, for example, start-stop synchronization or HDLC format is used, and the PID 63 and the control type 64 are used.
Is sent in these formats. The start code 62 is not required during start-stop synchronization, and is a flag pattern (for example, 01111110) in HDLC format. The check bit 65 is a one-bit parity bit for start-stop synchronization, and uses a well-known bit configuration of 16 bits for HDLC format.

When receiving the signal from the connection device 3, the control device 5
The PID is detected and the control type is decoded, and a call signal with the PID added is sent to the home memory 2. In home memory 2
When the subscriber information is retrieved from the PID and it is confirmed that the subscriber is an authorized subscriber, the subscriber verification information is returned to the control device 5. In response to this, the control device 5 sends an off-hook signal to the exchange 7 via the subscriber line 14. At this time, the exchange 7
Is a normal analog exchange, the loop of the two-wire line is turned on as in the case of off-hook by a normal telephone. If it is a digital exchange, use a signal format suitable for it.

Subsequently, the control device 5 sends out a charging stop signal. This signal prohibits the exchange 7 from charging the subscriber of the fixed telephone 13 corresponding to the relevant subscriber line number. Exchange 7
Is an analog exchange, for example, the polarity of a two-wire line can be inverted. The control device 5 turns on the built-in communication path after transmitting the charging stop signal. Thereby, the line from the exchange 7 to the portable device 4 is connected. Here, wireless channel setting control between the connection device 3 and the portable device 4 will not be discussed, but a known method such as a method used for a cordless system can be used.

The exchange 7 receiving the accounting stop signal sends a dial tone to the control device 3 side. The operator of the portable device 4 receiving this dials the subscriber number of the destination. Thereby, the portable device 4 transmits the dial signal. Upon receiving this, the exchange 7 performs a connection operation to the other party through a normal subscribing network, and when the connection is established, calls the other party and sends out a ringing tone (RBT) to the portable device 4. When the subscriber on the other end answers, the exchange 7 disconnects the RBT and starts talking. At this time, the control device 5 detects the disconnection of the RBT and sends a charging start signal to the home memory 2. The home memory 2 starts charging corresponding to the PID in response to this signal.

FIG. 4 is a block diagram of the control device 5. The control device 5 includes a decoder 51 for decoding a signal from the connection device 4.
And an encoder 52 for generating a control signal to the home memory 2.
, Connection of a line between the connection device 3 and the exchange 7, a control unit
A communication path switch 53 for turning on / off the connection between the switch 54 and the exchange 7 and the connection between the control unit 54 and the encoder 52, and a control unit 54 for controlling these switches.

FIG. 5 is a block diagram showing a specific configuration of the portable device 4. As shown in FIG.

Except for the changeover switch 45 and the control unit 44, the configuration is the same as that of the conventional cordless telephone shown in FIG.

The changeover switch 45 is for the operator to switch between the operation in the indoor mode and the operation in the outdoor mode. The control unit 44 controls the operation of the portable device 4, and controls the same operation as the conventional cordless telephone 10 in the indoor mode. In the outdoor mode, the call control shown in FIG. 2 and the call termination control shown in FIG. 6 are performed.

FIG. 6 shows a call termination sequence. Here, a case is shown in which the other party ends the call first.

When receiving the call termination signal sent from the exchange 7, the control device 5 sends the call termination signal to the connection device 3, and
A billing stop signal is sent to the home memory 2, and the communication path switch 53 is turned off. The home memory 2 receives this and stops charging for the corresponding PID. The connection device 3
The wireless line with the portable device 4 is restored by the end signal from the control device 5.

〔The invention's effect〕

As described above, the portable communication system of the present invention can be used not only as a cordless telephone indoors but also as an outgoing telephone call outdoors by carrying a small and lightweight portable device having a simple configuration. Therefore, there is an effect that an economical and easy portable communication service can be realized.

[Brief description of the drawings]

 FIG. 1 is a block diagram of a portable communication system according to an embodiment of the present invention. FIG. 2 is a diagram showing a calling sequence. FIG. 3 is a diagram showing a signal configuration. FIG. 4 is a block diagram showing an example of a control device. FIG. 5 is a block diagram showing an example of a portable device. FIG. 6 is a diagram showing a call termination sequence. FIG. 7 is a block diagram of a conventional cordless telephone system. FIG. 8 is a block diagram of a conventional connection device. FIG. 9 is a block diagram of a conventional cordless telephone.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H04B 7/24-7/26 H04M 15/00-15/38 H04Q 7/00-7/38

Claims (1)

(57) [Claims] 1. A portable device whose operation mode can be switched between an indoor mode and an outdoor mode, and first connection means for connecting the portable device in the indoor mode wirelessly to connect the portable device to a telephone network;
In a portable communication system including a second connection unit to which a portable device in an outdoor mode is wirelessly connected, and a line connection unit for connecting the second connection unit to a telephone network, the portable device includes an outdoor mode portable device. Means for adding an identification number uniquely assigned to the portable device to the outgoing call signal at the time of calling, and transmitting the call signal; And a means for performing a billing process in accordance with the identification number independently of the billing process for the connection via the first connection unit by the device.