JPH1127741A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system where the convenience of subscribers is improved by preventing in advance calls to which called parties cannot reply so as to reduce the occurrence of such calls. SOLUTION: A mobile telephone exchange 11 of this system is provided with a communication status discrimination means that discriminates a communication status of a called mobile telephone set 31, a storage section 12 that stores information of a caller side mobile telephone set 32 with respect to the mobile telephone set 31 when the communication is not available as a result of discrimination of the communication status and the position of the mobile telephone set 31, and a timer section 13 that monitors a registration transition time from a newest position registration request time of the mobile telephone set 31 until a succeeding position registration request. In the case that the registration transition time in the timer section 13 reaches or exceeds a prescribed time, communication unavailability is discriminated and the information of the mobile telephone set 32 is stored in the storage section 12 and a short message transmitter 21 is controlled to transmit a short message denoting a communication disable status to the mobile telephone set 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system having a function of notifying whether a mobile telephone can receive a call.

[0002]

2. Description of the Related Art Conventionally, in a general mobile communication system, when a destination mobile telephone moves out of a service area or when a power of a destination mobile telephone is off,
Since it becomes impossible for the destination mobile telephone to receive a call from the originating mobile telephone, it is necessary for the originating mobile telephone to repeat the call in order to attempt a telephone call based on the incoming call.

[0003] Therefore, a technique related to a mobile communication system for avoiding such communication inconvenience has been proposed. For example, in a cellular mobile telephone switching system disclosed in Japanese Patent Application Laid-Open No. 5-145479, a message of a caller by a calling mobile telephone is automatically recorded in a system when a destination mobile telephone is in a state where reception is impossible. Also, there is disclosed a technique for providing a means for notifying a message when a destination mobile telephone returns to a communicable state.

The mobile communication system disclosed in Japanese Patent Laid-Open Publication No. Hei 7-336761 is provided with a call originating mobile telephone which wants to notify the state return when the destination mobile telephone returns to a communicable state. There is disclosed a technique in which a notification is provided and a means is provided for recognizing that the incoming call destination mobile telephone itself has received an incoming call.

[0005]

In any of the mobile communication systems described above, the notification that the destination mobile telephone has returned to a communicable state in any case indicates that the destination mobile telephone has returned to a communicable state. However, there is a problem that the process is performed only for the caller who wishes to receive the notification of the above, and is not performed for other subscribers. This allows
For example, it is possible to avoid unnecessary calls to subscribers who are about to make a call, subscribers who frequently call each other, or who frequently turn off the power of the mobile telephone or move out of the service area. Can not.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its technical problem is to prevent and reduce outgoing calls that cannot be answered and improve the convenience of subscribers. It is to provide a mobile communication system capable of measuring the following.

[0007]

According to the present invention, a plurality of mobile telephones performing wireless communication within a predetermined service area and a specific one of the plurality of mobile telephones is transmitted as wireless communication. Or, a plurality of radio base stations for making each incoming call within a predetermined service area, and a specific one of a plurality of mobile telephones via a specific one of a plurality of radio base stations. A mobile communication system that performs communication connection exchange for outgoing and incoming calls, and a communication state determination unit that determines a communication state of a destination mobile telephone among a plurality of mobile telephones, and a destination mobile telephone. Storage means for storing information of the originating mobile telephone for the destination mobile telephone when the communication is disabled as a result of the determination of the position and the communication state; Time monitoring means for monitoring the registration transition time from the latest location registration request time for the destination mobile phone to the next location registration request, and sending a short message according to the communication state of the destination mobile phone stored in advance to the originating mobile phone A mobile communication system having short message sending means for sending to the telephone is obtained.

According to the present invention, in the mobile communication system, the communication state determining means, the storage means, and the time monitoring means are provided in the mobile telephone exchange, and the short message sending means is controlled in accordance with the control of the mobile telephone exchange. A mobile communication system for transmitting a short message is obtained.

Further, according to the present invention, in the above-mentioned mobile communication system, the mobile telephone exchange judges that communication is impossible when the registration transition time exceeds a predetermined time, and stores information on the originating mobile telephone. And a mobile communication system that controls the short message sending means to send a short message to the originating mobile phone as a short message according to a communication disabled state.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mobile communication system according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a basic configuration of a mobile communication system according to one embodiment of the present invention. This mobile communication system includes a plurality (two in this case) of mobile telephones 3 each performing wireless communication within a predetermined service area.
And a plurality of (two in this case) wireless base stations 41 and 42 for making outgoing or incoming calls as radio communication between these mobile telephones 31 and 41 within a predetermined service area, respectively. Mobile telephone exchanges 11, which are connected to the wireless base stations 41 and 42, and exchange outgoing or incoming communication connections between the mobile telephones 31 and 41 via the wireless base stations 41 and 42; Communication status determination means for determining the communication status of the destination mobile telephone (for example, the mobile telephone 31), and the location of the destination mobile telephone 31 and the destination of the destination if the communication is not possible as a result of the determination of the communication status. A storage unit for storing information (telephone number and the like) of the calling mobile telephone (for example, mobile telephone 32) for the mobile telephone 31; And time monitoring means from the position registration request time of monitoring the registration transition time to the next location registration request,
A short message transmitting device 21 connected to the mobile telephone exchange 11 and transmitting short messages to the originating mobile telephone 32 according to the communication state of the destination mobile telephone 31 stored in advance; It consists of

The mobile telephone exchange 11 includes a storage unit 1 serving as a storage unit in addition to a communication state determination unit (not shown).
2 and a timer unit 13 as time monitoring means. When the registration transition time in the timer unit 13 exceeds a predetermined time, it is determined that communication is impossible, and the information of the originating mobile telephone 32 is stored in the storage unit 12. At the same time, the short message sending device 21 is controlled so that the originating mobile telephone 3
2 is sent as a short message according to the communication disabled state.

In this mobile communication system, the destination mobile telephone 31 periodically makes a position registration request to the mobile telephone exchange 11 regularly to clarify its own position and prepare for a communication request such as an incoming call. .

In this mobile communication system, the destination mobile telephone 31 periodically requests its own location registration to the mobile telephone exchange 11 when the power is turned on within a predetermined service area. Mobile telephone exchange 1
Numeral 1 stores the location of the destination mobile telephone 31 in the storage unit 12 and controls it.

Here, when the destination mobile telephone 31 moves out of the service area or when the power is turned off, a periodic location registration request is not satisfied. As a result, the timer unit 13 of the mobile telephone exchange 11 receives the destination mobile telephone 3
1 to monitor the registration transition time from the latest location registration request time to the next location registration request, and if there is no next location registration request even if this registration transition time exceeds a predetermined time set in advance, The telephone exchange 11 determines that the destination mobile telephone 31 has moved out of the service area or turned off. Therefore, the mobile telephone exchange 11 controls the short message sending device 21 and sends a short message corresponding to the communication state of the destination mobile telephone 31 registered in advance as a short message to the originating mobile telephone 32 according to the communication disabled state. Notice.

On the other hand, when the destination mobile telephone 31 returns from outside the predetermined service area to the predetermined service area or when the power is turned on, the destination mobile telephone 31 automatically returns to the mobile telephone exchange 11 again. A new location registration request is established. Therefore, the mobile telephone exchange 11 stores the location in the storage unit 12 and, at the same time, controls the short message sending device 21 to output a short message according to the communicable state as the originating mobile telephone 32.
Notify to

That is, in the case of this mobile communication system, any subscriber who is registered in the system as a subscriber who needs to be notified can know at any time whether the destination mobile telephone 31 can receive a call. The subscriber does not repeat the transmission many times or misses the transmission when communication is possible. As a result, the complexity of the subscriber is greatly reduced, and the convenience is improved.

[0018]

As described above, according to the mobile communication system of the present invention, since the originating mobile telephone recognizes in advance whether the destination mobile telephone can receive a call, the useless transmission and retransmission are repeated. It is possible to communicate with the destination mobile telephone without any problem, prevent and reduce outgoing calls for which incoming calls cannot be answered, and improve the convenience of the subscriber.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a mobile communication system according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Mobile telephone exchange 12 Storage part 13 Timer part 21 Short message transmission device 31, 32 Mobile telephone 41, 42 Radio base station

Claims (3)

[Claims] 1. A plurality of mobile telephones each performing wireless communication within a predetermined service area, and transmission or reception as the wireless communication between specific ones of the plurality of mobile telephones, respectively, in the predetermined service. A plurality of radio base stations for performing within the area, and the transmission or reception of calls between the specific ones of the plurality of mobile telephones via the specific ones of the plurality of radio base stations. In a mobile communication system including a mobile telephone exchange for performing a communication connection exchange, a communication state determining means for determining a communication state of a destination mobile telephone among the plurality of mobile telephones, a position relating to the destination mobile telephone, and Storage means for storing information of the originating mobile telephone for the destination mobile telephone when the communication is disabled as a result of the determination of the communication state, Time monitoring means for monitoring the registration transition time from the latest location registration request time to the next location registration request for the destination mobile phone, and a short message according to the communication state stored in advance for the destination mobile phone. A mobile communication system comprising: a short message sending unit that sends the short message to the calling mobile phone. 2. The mobile communication system according to claim 1, wherein said communication state determination means, said storage means, and said time monitoring means are provided in said mobile telephone exchange, and said short message sending means is provided in said mobile telephone exchange. A mobile communication system for transmitting the short message according to control. 3. The mobile communication system according to claim 2, wherein the mobile telephone exchange judges that the communication is impossible when the registration transition time exceeds a predetermined time, and transmits the information of the originating mobile telephone. A mobile communication system which stores the short message in the storage means and controls the short message sending means to send the short message according to a communication disabled state to the originating mobile telephone.