JPH06253361A - Isdn digital automobile telephone exchange system - Google Patents

Abstract

PURPOSE:To provide an ISDN digital automobile telephone exchange system capable of executing a paging service as well other than an original automobile telephone service by using an ISDN automobile telephone terminal and an ISDN digital automobile exchange. CONSTITUTION:A radio calling memory for storing at least message transmission destination subscriber numbers, message registration subscriber numbers and message information is provided inside an ISDN digital automobile telephone exchange SWE and a message registration subscriber registers a message addressed to a message receiving subscriber terminal MSb in the radio calling memory. When the message receiving subscriber MSb is in a message receivable state, a cyclically activated message transmission processing program reads the message information inside the radio calling memory and transmits it to the message receiving subscriber MSb.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN digital mobile telephone exchange system, and more particularly to an ISDN digital mobile telephone exchange system which also provides a radio paging service with an ISDN digital mobile telephone exchange.

[0002]

2. Description of the Related Art In a conventional mobile telephone system for a mobile communication system, an exchange and a radio base station device exclusively for exchanging a car telephone and a dedicated car telephone terminal accommodated therein are required.

Further, the paging system requires a dedicated radio call exchange, radio base station device and radio call terminal (pager).

[0004]

In this conventional mobile communication system, a subscriber who intends to receive a car phone service and a paging service must have a car phone terminal and a pager, respectively. However, there is a problem in that the service provider side must install an exchange and a wireless base station device dedicated to each service.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ISDN digital car telephone exchange system which can implement a paging service in addition to the original car telephone service by using an ISDN car telephone terminal and an ISDN digital car exchange.

[0006]

The ISDN digital car telephone exchange system of the present invention is an ISDN digital car telephone exchange system comprising an ISDN digital car telephone exchange and an ISDN car telephone terminal housed therein. The ISDN digital car telephone exchange is characterized in that it also makes a radio call connection to the ISDN car telephone terminal.

In the ISDN digital mobile telephone exchange, the message calling subscriber number, the message registration subscriber number, and the radio call memory that stores the message information, and the message sending subscriber terminal are in a state where the message can be received. And a control means for reading the message information in the radio call memory and transmitting it to the message destination subscriber terminal.

Further, when the ISDN car telephone terminal moves from a radio zone that cannot be activated by the ISDN digital automobile telephone exchange to a radio zone where it can be activated and registers its own location, the control means moves to this terminal. It is characterized in that control for transmitting the message information is performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sequence chart showing a sequence of a message registration operation and a message transmission operation in one embodiment of the present invention, FIG. 2 is a flow chart showing a processing flow of the message transmission operation in this embodiment, and FIG.
FIG. 6 is a diagram for explaining a method for searching a radio call memory in this embodiment.

The message registration operation will be described with reference to FIG.

When the message registration subscriber (MSa) dials a message registration telephone number (message destination subscriber number and message registration subscriber number), I
A call setup request (SETUP) is made to the SDN digital mobile telephone exchange (SWE), and the SWE sends a call setup acceptance signal (CALL PROC) to the MSa to notify that the requested call setup has started.

Next, SWE is a calling signal (ALERT).
Informs you that the radio call memory is ringing,
Subsequently, the response signal (CONN) is used to notify the MSa that the radio call memory has responded. The MSa sends a response confirmation signal (CONN ACK) to the SWE.

Next, when MSa transmits message information by, for example, a PB signal, SWE registers this message information in the radio call memory. When message registration is completed, MSa sends a disconnection signal (DISC) to SWE to request disconnection. In SWE, the connection to the radio call memory is released, a release signal (REL) is sent to MSa, and MSa returns a release complete signal (RLC).

Since the message is registered for each MSa, the registration information for each MSa is stored in the radio call memory.

Next, the message transmission process in this embodiment will be described in detail with reference to FIGS. 2 and 3.

The message transmission processing program in this embodiment is periodically activated in SWE (step 20).
1).

This message transmission processing program determines whether or not radio call service processing is necessary (step 202). When it is determined that the message is necessary (Yes in step 202), it is checked whether or not the message to be transmitted is registered (step 203).

Specifically, the message presence / absence flag in the radio call memory shown in FIG. 3 is searched for by the subscriber number, and if the flag of this subscriber number is set to "1", for example, it is registered (step 203). Yes).

Next, the pager memory shown in FIG. 3 is searched for the subscriber number, and the message corresponding to the registered subscriber telephone number is retrieved from the message registration memory in the next table (step 204).

Next, the MSb of the message receiving subscriber number
The above-mentioned message taken out is transmitted (step 20).
5). This completes the message transmission process from the one-message registered subscriber.

Next, returning to step 202, the processing from step 202 to step 205 is repeated until the registration of the radio call service in the radio call memory disappears (there is no in step 203).

In step 203, No (no registration)
Also in case of, it returns to step 202. When it is determined that the radio call service process is not necessary (No in step 202), the radio call process of this cycle ends.

In this embodiment, when the MSb moves from a wireless zone that cannot be activated by SWE to a wireless zone that can be activated and registers its own location, the periodically activated message transmission processing program is sent to the MSb. Message transmission control can be performed.

[0025]

As described above, the present invention is based on ISDN.
Since radio call services can also be performed using the digital car telephone exchange, service subscribers do not need pager terminals, and service providers need to install exchanges and radio base station equipment dedicated to radio call services. , All of the ISDN digital mobile telephone service subscribers can be provided with a radio call service.

Further, the subscriber has the effect that he / she can also receive the radio call service by subscribing only to the car telephone service.

[Brief description of drawings]

FIG. 1 is a sequence chart showing a sequence of a message registration operation and a message transmission operation according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing flow of a message transmission operation in this embodiment.

FIG. 3 is a diagram for explaining a method for searching a radio call memory according to the present embodiment.

[Explanation of symbols]

 MSa message registration subscriber MSb message receiving subscriber SWE ISDN digital mobile telephone exchange SETUP call setup request CALL PROC call setup acceptance signal ALERT call signal CONN response signal CONN ACK response confirmation signal DISC disconnection signal REL release signal RLC release end signal

Claims (3)

[Claims] 1. An ISDN digital automobile telephone exchange system comprising an ISDN digital automobile telephone exchange and an ISDN automobile telephone terminal housed therein, wherein the ISDN digital automobile telephone exchange is the I
An ISDN digital car telephone exchange system characterized by making a radio call connection to an SDN car telephone terminal. 2. The ISDN digital mobile telephone switchboard has a radio call memory for accumulating at least a message destination subscriber number, a message registration subscriber number and message information, and a message destination subscriber terminal in a state where a message can be received. 2. The ISDN digital mobile telephone exchange system according to claim 1, further comprising control means for reading the message information in the radio call memory and transmitting the message information to the message destination subscriber terminal. 3. The ISDN car telephone terminal is the IS
The control means controls the transmission of the message information to this terminal at the time when the location of the terminal itself is registered by moving from a radio area that cannot be activated by the DN digital automobile telephone exchange to a radio area that can be activated. The ISDN digital car telephone exchange system according to claim 2.