JP2000209650A - Mobile communication system using satellite portable telephone set and ground-based pager - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compensate the disadvantages o the absence of two-way communication performance in an on-ground paging system and of a low link margin in a satellite portable telephone system. SOLUTION: A position estimation means 105 in a satellite portable telephone system 100 estimates the position of a satellite portable telephone terminal 101 and supplies positional information to a service area switching means 204 in an on-ground paging system 200. The service area switch means 204 regards this positional information as that for an on-ground system pager terminal 201 possessed by the same user and switches a service area automatically. In the case that call connection to the satellite portable telephone terminal 101 is disabled, the means 204 informs the on-ground system pager terminal 201 about the arrival of a call connection request addressed to the satellite portable telephone terminal.

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 in which a satellite mobile phone and a terrestrial pager are combined.

[0002]

2. Description of the Related Art In recent years, various mobile communication systems have become widespread with advances in wireless communication technology, miniaturization and low power consumption of communication terminals, and reduction in communication charges. Among them,
The paging system is widely used as an ultra-small terminal with a long battery life or as a simple message communication system utilizing characteristics such as high transparency that can be received even in a building. Paging system standards include:
The POCSAG method and the FLEX-TD method are known, and the ARIB standard (RCR STD-4), respectively.
2, 43) are disclosed.

The configuration and operation of a conventional paging system will be briefly described below with reference to FIG. In FIG. 9, a specific pager terminal 902 is connected from a public line 901 or the like.
Is received by the central station 903, transferred to one or more base station groups 904a, 904b, 904c in the service area, and a paging message is transmitted from each of the base stations 904a, 904b, 904c. You. The pager terminal 902 can receive the transmitted paging message if it is within the service area of the paging system.

When the pager terminal 902 has a function capable of roaming to a plurality of service areas, the user of the pager terminal 902 can notify the central office of the location of the roaming destination via a public line in advance. Is registered, the central office 903 transfers the paging request to the central office 905 that manages another service area based on the location registration information, and transmits one or more paging requests under the management of the central office 905. Base stations 906a, 906b, 906c
Sends a call signal to the pager terminal 902. In this way, if the user re-registers the location information via a public line or the like, even if the user moves to another service area,
It becomes possible to receive a paging message.

In recent years, communication satellites have been used to provide services to areas where infrastructure development is difficult with terrestrial systems, such as depopulated areas and areas with topographical restrictions, and global mobile communication services. Mobile cell phone systems have been proposed, and some have already been put into practical use. For example, the Intelsat system has already been put into practical use as a system using geostationary satellites as communication satellites, and the ICO system and the Iridium system are planned as systems using communication satellites orbiting in a medium orbit or low orbit. ing. If these systems are used, the user can receive a communication service anywhere on the earth without worrying about the service area as in a terrestrial system when outdoors.

Referring to FIG. 10, the configuration and operation of a satellite-based mobile phone system will be briefly described by taking a case where a call request is made from a public line to a satellite-based mobile phone terminal as an example. In FIG. 10, when a call request is issued from a public line 1001 or the like, a satellite-based mobile phone is registered based on information registered in advance by a satellite-based mobile phone terminal 1003 via a network system 1002 for a satellite-based mobile phone system. A call request signal is transmitted via the earth station 1004a covering the position of the terminal 1003 and the relay satellite 1005a. By responding to the call request signal, the satellite portable telephone terminal 1003 establishes a call from the public line to the satellite portable telephone terminal. As a method of registering the position of the satellite-based mobile phone system, an approximate location on the earth of the mobile phone terminal is specified by using parameters such as propagation delay time at the time of communication between the communication satellite and the mobile phone terminal. It is also possible.

[0007]

However, in the conventional ground-based paging system as shown in FIG. 9, the information is transmitted only in one direction from the system side to the terminal side. Information cannot be transmitted. Therefore, an automatic acknowledgment cannot be made as to whether the pager terminal 902 has normally received the paging message from the system. Further, even when the paging system and the pager terminal 902 can roam to a plurality of service areas, the switching of the service area must be manually performed by the user of the pager terminal 902 using a public line or the like. No.

Further, in the satellite mobile phone system of FIG. 10, since it is difficult to secure a link margin in comparison with a terrestrial system due to the line design, a shield is provided between the mobile phone terminal 1003 and the relay satellite 1005. When the mobile phone terminal 1003 exists or the mobile phone terminal 1003 is in a building, the communication quality is degraded, and a state where communication is impossible occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the terrestrial paging system and the satellite mobile phone system. It aims to complement the disadvantages of the terrestrial paging system, such as the lack of uplink means, and the low link margin of the satellite-based mobile phone system, by using the advantages of the global service area and location detection function of the system. I do.

[0010]

In order to achieve this object, a mobile communication system using a satellite-based mobile phone and a terrestrial pager according to the present invention comprises a satellite-based mobile phone terminal, a group of earth base stations, and the satellite-based mobile phone. A satellite-based mobile phone system including a mobile phone terminal and a relay satellite group that relays the earth base station group, a satellite-based mobile phone network system that connects the earth base stations, and roaming to a plurality of service areas. A terrestrial paging system comprising a terrestrial paging terminal, a terrestrial paging base station group, and a terrestrial paging network system connecting the terrestrial paging base stations; and An interconnection system for connecting a network system and the ground pager network system, wherein the satellite Mobile telephone system, a position estimation means for estimating the approximate position of the satellite-based mobile telephone terminal,
Position notifying means for notifying the terrestrial paging system of the approximate position information obtained from the position estimating means via the interconnection system, wherein the terrestrial pager network system comprises: Service area switching means for determining the service area corresponding to the terrestrial pager by treating the position information of the satellite-based mobile phone terminal obtained as described above as the position information of the terrestrial pager terminal, and switching the service area of the terrestrial pager terminal Is provided.

According to the present invention having such a configuration, it is possible to use the uplink of the satellite mobile phone system as the uplink means in the terrestrial paging system.
Position detection for switching service areas during roaming can be supplemented by a position detection function in a satellite-based mobile phone system. Further, a low link margin in a satellite-based mobile phone system can be compensated for by high transparency in a terrestrial-based paging system.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a satellite-based mobile phone terminal, a group of earth base stations, and a relay satellite for relaying the satellite-based mobile phone terminal and the earth base station group. Group, a satellite-based mobile phone system constituted by a satellite-based mobile phone network system connecting the earth base stations, a ground-based pager terminal capable of roaming to a plurality of service areas, and a ground-based paging base station group A terrestrial paging network system for connecting the terrestrial paging base stations to each other, and a mutual connection for connecting the satellite mobile phone network system and the terrestrial pager network system. A connection system, wherein the satellite-based mobile phone system estimates a rough position of the satellite-based mobile phone terminal. A position estimating unit, and a position notifying unit that notifies the terrestrial paging system of the approximate position information obtained from the position estimating unit via the interconnection system. Treating the location information of the satellite-based mobile phone terminal obtained from the location notification means as the location information of the terrestrial pager terminal to determine a corresponding service area of the terrestrial pager terminal, and determining the service area of the terrestrial pager terminal. A service area switching means for switching, a rough position of a user having a terrestrial pager terminal and a satellite-based mobile phone terminal is estimated by the position estimating means, and the service area is notified from the position notifying means via the interconnection system. Notify the switching means, and from the estimated position, the service area of the terrestrial pager It has the effect of switching the service area if required switching has occurred.

According to a second aspect of the present invention, in the mobile communication system according to the first aspect, the position estimating means and the position notifying means are provided in the network system for the satellite-based mobile phone. Using a signal transmitted from the satellite-based mobile phone terminal via the relay satellite group to estimate the position of the satellite-based mobile phone terminal and supplying the estimation result to the first notification means. Having.

According to a third aspect of the present invention, in the mobile communication system according to the first aspect, the position estimating means is provided in the satellite mobile telephone terminal, and the position notifying means is provided. Is provided in the satellite-based mobile phone network system. The satellite-based mobile phone terminal estimates the position of its own station and sends the estimation result to the first location notification means via the relay satellite group. Having.

According to a fourth aspect of the present invention, in the mobile communication system using the satellite-based mobile phone and the terrestrial pager according to the first aspect, each of the relay satellite groups has a plurality of spot beam configurations. The relay between the terminal and the earth base station is performed, and the position estimating means uses the center position of the irradiation area of the spot beam on the earth as a rough estimated position of the satellite-based mobile phone terminal. There is an effect that the center position of the spot beam is used as a rough estimated position of the satellite mobile phone terminal in the beam.

According to a fifth aspect of the present invention, in the mobile communication system according to the second aspect of the present invention, the position estimating means is configured to transmit the uplink signal transmitted from the satellite mobile telephone terminal. Based on the amount of propagation delay or Doppler shift, or a combination thereof, to estimate the position of the satellite mobile phone terminal, within the satellite mobile phone network system, the uplink transmission signal from the satellite mobile phone terminal And has the effect of estimating the position of the satellite-based mobile phone terminal.

According to a sixth aspect of the present invention, in the third aspect of the present invention, the position estimating means includes a Doppler shift or a propagation delay amount of a downlink signal from one or a plurality of relay satellite groups, or the amount thereof. This is for estimating the position of the satellite mobile phone terminal based on the combination of the above. The position of the own station is estimated using the position estimating means, and the estimation result is sent to the first position notifying means via the relay satellite group. Has the effect of sending

According to a seventh aspect of the present invention, there is provided a satellite mobile phone terminal, a group of earth base stations, a relay satellite group for relaying the satellite mobile phone terminal and the earth base station group, and the earth base station. Satellite-based mobile phone system configured by a satellite-based mobile phone network system that connects between them, a ground-based pager terminal capable of roaming to a plurality of service areas, a ground-based paging base station group, and the ground-based paging base A mobile station provided with a terrestrial paging system constituted by a terrestrial pager network system for connecting stations, and an interconnection system for connecting the satellite mobile phone network system and the terrestrial pager network system. In a mobile communication system, a terrestrial pager terminal supports roaming in the satellite mobile phone terminal Area information storage means for preliminarily storing information on service areas available, position estimating means for estimating the approximate position of the terminal itself, and a service in which the position estimating means enables the service area of the terrestrial pager terminal to support another roaming. If you decide that you ’ve moved to an area,
Switching request means for transmitting a request to switch the destination of the paging message to the migrated service area, the network system for the terrestrial pager,
A mobile communication system comprising a satellite-based mobile phone and a terrestrial pager, comprising a service area switching means for switching a service area of a terrestrial pager in response to a switching request transmitted from the switching request means. It has the effect of making a request to switch the service area of a terrestrial pager from a system-based mobile phone terminal via a satellite-based mobile phone network system.

According to an eighth aspect of the present invention, in the mobile communication system according to the first aspect of the present invention, the service area switching means in the terrestrial pager network system comprises a satellite area portable telephone. When the position information notified from the network system is out of the service area capable of roaming of the terrestrial pager terminal, outputs a signal outside the service area,
The terrestrial pager network system further includes a storage unit for storing a paging message addressed to the terrestrial pager terminal without transmitting the signal when the out-of-service-area signal is output. When the location information notified from the satellite-based mobile phone network system via the terrestrial pager terminal leaves the roaming-capable service area, it is stored without transmitting a paging message to the terrestrial pager terminal. Has the effect of keeping.

According to a ninth aspect of the present invention, in the mobile communication system according to the eighth aspect, the network system for the terrestrial pager is notified from the network system for the satellite type mobile phone. When the location information to enter the area from outside the roaming-capable service area of the terrestrial pager terminal, the stored message transmission for transmitting the paging message stored in the storage means to the service area designated by the service area switching means. Having means,
If the location information notified from the satellite mobile phone network system via the interconnection system enters the area from outside the roaming-capable service area of the terrestrial pager terminal, the paging stored in the storage means This has the effect of transmitting the message to the service area specified by the service area switching means.

According to a tenth aspect of the present invention, there is provided a satellite mobile phone terminal, a group of earth base stations, a relay satellite group for relaying the satellite mobile phone terminal and the earth base station group, and the earth base station. Satellite-based mobile phone system configured by a satellite-based mobile phone network system that connects between them, a ground-based pager terminal capable of roaming to a plurality of service areas, a ground-based paging base station group, and the ground-based paging base A mobile station provided with a terrestrial paging system constituted by a terrestrial pager network system for connecting stations, and an interconnection system for connecting the satellite mobile phone network system and the terrestrial pager network system. In the body communication system, the satellite-based mobile phone system is roughly equivalent to the satellite-based mobile phone terminal. Position estimating means for estimating a position, position notifying means for notifying rough ground information obtained from the position estimating means to the terrestrial paging system via the interconnection system, and a satellite mobile phone terminal. The satellite-based mobile phone terminal has a message receiving means for receiving a message transmitted from the message transmitting means, and the terrestrial pager network system comprises: Treats the location information of the satellite-based mobile phone terminal obtained from the location notifying means as the location information of the terrestrial pager terminal, determines a service area corresponding to the terrestrial pager, and sets a paging message addressed to the terrestrial pager terminal. Said terrestrial paging base station or terrestrial paging base station Service area switching means for switching the location of the satellite mobile telephone terminal notified from the position notifying means when a paging message transmission request to the terrestrial pager terminal is made, the service area capable of roaming the terrestrial pager terminal. And a message transfer requesting means for requesting a transfer of a paging message addressed to the terrestrial pager terminal to the message transmitting means when a paging message transmission request to the terrestrial pager terminal occurs. When the position of the satellite mobile phone terminal finally notified via the connection system is out of the service area capable of roaming of the terrestrial pager terminal, a paging message addressed to the terrestrial pager terminal is transmitted. Through the interconnect system Then, the data is transferred to the satellite mobile phone terminal via the satellite mobile phone system.

According to the eleventh aspect of the present invention, in the satellite mobile phone terminal of the mobile communication system using the satellite mobile phone and the terrestrial pager according to the tenth aspect, when the message is received, the message is successfully received. ACK transmitting means for transmitting an acknowledgment (ACK) to the earth base station group via the relay satellite group is provided, and in the satellite mobile phone network system, the ACK signal from the satellite mobile phone terminal is transmitted. ACK transfer means for transferring to the terrestrial pager network system via the interconnection system, and in response to a message transfer request from the terrestrial paging system, transmits a message to the satellite mobile telephone terminal. In this case, from the ACK transmitting means, the relay satellite group, the earth base station group, the ACK transferring means,
The ACK information is transferred to the terrestrial pager network system via the interconnection system.

According to a twelfth aspect of the present invention, in the mobile communication system according to the first aspect of the present invention, information on a service area in which the terrestrial pager terminal can support roaming is stored in advance. 2
The area information storage means is provided in a satellite-based mobile phone network system, and in the satellite-based mobile phone network system,
Call connection request means for requesting transmission of a call connection request message to a satellite-based mobile phone terminal via an interconnection system is provided. When the final position information obtained from the position estimating means is in the service area stored in the second area information storage means, the call connection request means makes the call through the interconnection system. In this case, a call connection request message is requested to be transmitted as a paging message to the satellite mobile phone terminal.

According to a thirteenth aspect of the present invention, there is provided a satellite mobile phone terminal, a group of earth base stations, a relay satellite group for relaying the satellite mobile phone terminal and the earth base station group, and the earth base station. Satellite-based mobile phone system configured by a satellite-based mobile phone network system that connects between them, a ground-based pager terminal capable of roaming to a plurality of service areas, a ground-based paging base station group, and the ground-based paging base A mobile station provided with a terrestrial paging system constituted by a terrestrial pager network system for connecting stations, and an interconnection system for connecting the satellite cell phone network system and the terrestrial pager network system. In the body communication system, the satellite-based mobile phone system is roughly equivalent to the satellite-based mobile phone terminal. Position estimating means for estimating a position, position notifying means for notifying rough ground information obtained from the position estimating means to the terrestrial paging system via the interconnection system, and a satellite mobile phone terminal. The satellite-based mobile phone terminal has a message receiving means for receiving a message transmitted from the message transmitting means, and the terrestrial pager network system comprises: Treats the location information of the satellite-based mobile phone terminal obtained from the location notifying means as the location information of the terrestrial pager terminal, determines a service area corresponding to the terrestrial pager, and sets a paging message addressed to the terrestrial pager terminal. Said terrestrial paging base station or terrestrial paging base station Service area switching means for switching the location of the satellite mobile telephone terminal notified from the position notifying means when a paging message transmission request to the terrestrial pager terminal is made, the service area capable of roaming the terrestrial pager terminal. A message transfer requesting means for requesting a transfer of a paging message addressed to the terrestrial pager terminal to the message transmitting means when the mobile communication system is a satellite mobile phone and a terrestrial pager. Yes, the approximate location of the user having the satellite / mobile phone / terrestrial pager combined terminal is estimated by the first location estimating means, and the first service area switching is performed from the location notifying means via the interconnection system. Means, and from the estimated position, a ground pager If it becomes necessary to switch the service area of
It has the effect of switching service areas.

According to a fourteenth aspect of the present invention, there is provided a terrestrial pager network system in a mobile communication system using a satellite portable telephone / terrestrial pager combined terminal according to the thirteenth aspect. Numbering means for sequentially assigning a number to each paging message addressed to each terrestrial pager terminal function unit, storage means for storing the assigned number and the paging message for a fixed period of time, A retransmission unit for reading out a paging message of a specific number addressed to the pager terminal function unit from the storage unit and performing retransmission processing. Requests the mobile phone terminal function unit to transmit a paging message retransmission request signal. A retransmission request transferring means for transferring the retransmission request signal to the retransmitting means, wherein the number of the paging message received by the complex terminal is If a missing number is found, the retransmission requesting means makes a retransmission request to the terrestrial pager network system via the satellite mobile phone system, and the terrestrial pager network system responds to the retransmission request by sending the missing number. Is retransmitted.

According to a fifteenth aspect of the present invention, there is provided a mobile communication system using a combined satellite portable telephone / terrestrial pager terminal according to the thirteenth aspect. In the function of the mobile phone terminal, the satellite mobile phone terminal function unit of the combined terminal has position estimating means, and the terrestrial pager terminal function unit includes information on service areas in which the terrestrial pager terminal function unit can support roaming, A roaming information storage means for storing in advance a plan of a frequency channel corresponding to the service area; and a roaming information storage means for monitoring the current service area channel monitored by the terrestrial pager terminal function unit or obtained from the position estimating means. When it is determined that the mobile phone has left the current service area based on the estimated location information, Channel control means for extracting frequency channel candidates of a roamable service area from a storage means in ascending order of distance, and performing channel scanning. The current service area monitored by the function of the terrestrial pager terminal is provided. If the channel is lost, or if it is determined that the current service area has left based on the position estimation information obtained from the position estimating means, to extract a frequency channel candidate of a roamable service area close to the roaming information storage means, This has the effect of scanning the channel.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 shows a configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager in the first embodiment. In FIG. 1, a satellite portable telephone system 100 is a communication satellite. And provides a communication service with a mobile communication terminal through a mobile communication terminal. Be composed. The satellite-based mobile phone terminal 101 has a man-machine interface similar to a conventional terrestrial-based mobile phone terminal, and transmits information such as voices and characters from a user input via the man-machine interface to a satellite-based mobile phone system. And converts the signal into a signal compliant with the air interface, and conversely converts the received signal and outputs it as voice, text, etc. via the man-machine interface.

The relay satellite groups 102a and 102b are composed of the satellite mobile phone terminal 101 and the earth base station groups 103a and 103.
This relays the transmission / reception signal during b. The relay satellite groups 102a and 102b may be configured by one or a plurality. In the present embodiment, it is assumed that two earth base stations 102a and 102b are used.

The earth base station groups 103a and 103b transmit the data supplied from the satellite-based mobile phone network system 104 to the satellite-based mobile phone terminal 101 via the relay satellite groups 102a and 102b. A signal transmitted from the telephone terminal 101 via the relay satellite groups 102a and 102b is received, and the received data is supplied to the satellite portable telephone network system 104.
The earth base station groups 103a and 103b may be configured by one or a plurality. In the present embodiment, it is assumed that two earth base stations 103a and 103b are used. The satellite-based mobile phone network system 104 connects communication between individual satellite-based mobile phone terminals or connects to another public line network.

The terrestrial paging system 200, based on a paging request issued via a public line or the like,
This is a system that transmits a paging message to a pager terminal in a service area. In the present embodiment, it is assumed that the system has a plurality of service areas and can perform roaming switching to each service area.

In the terrestrial paging system 200, the terrestrial paging terminal 201 receives a signal transmitted from a base station and notifies a user of a paging message via a man-machine interface. It is assumed that roaming can be performed for a plurality of service areas. Specifically, when a transition is made from one service area to another service area, channel rescanning is automatically performed, and reception of a channel in a new service area is started.

Network system 2 for terrestrial pager
02 transfers a paging signal to the base stations 203a and 203b in the corresponding service area in response to a paging request issued from a public line or the like to each pager terminal. Terrestrial paging base station group 20
Reference numerals 3a and 203b transmit a paging signal supplied from the terrestrial pager network system 202. This pager base station group 203a, 20
3b may be configured by one for each service area, or may be configured by a plurality. In the present embodiment, it is assumed that one base station 203a, 203b is provided for each of two service areas.

Further, in the first embodiment, the position estimating means 1
05 and the position notifying means 106 are provided. The position estimating means 105 estimates the approximate position of the satellite-based mobile phone terminal 101. For example, the satellite-based mobile phone terminal 1
01 is transmitted to the earth base station groups 103a, 103a via the relay satellite groups 102a, 102b.
It is assumed that the position on the earth is estimated two-dimensionally based on the amount of propagation delay and the amount of Doppler shift that occur when reaching 03b.

In the terrestrial pager network system 202, a service area switching means 204 is provided.
Is provided. The service area switching means 204
The terrestrial paging base station 203 receives the position information of each pager terminal 201 and transfers a paging signal addressed to each pager terminal 201 based on the input position information.
a and 203b are switched. The interconnection system 400 includes a network system 104 for a satellite-based mobile phone and a network system 2 for a terrestrial pager.
02 are mutually connected, and communicate system information and traffic information of mutual systems.

In this embodiment, the satellite mobile phone terminal 1
01 and the terrestrial pager terminal 201 are assumed to be carried by the same user, and the satellite-based mobile phone network system 104 and the terrestrial pager network system 202 both hold information on the association between the two terminals. Shall be

In the satellite mobile phone system and the terrestrial paging system configured as described above, the normal operation of outgoing / incoming calls and calls of the satellite mobile phone system and the normal paging operation of the terrestrial paging system are as follows. This is the same as the conventional example.

Here, an operation which is a feature of the present embodiment will be described. In the satellite-based mobile phone system 100, the position estimation means 105 in the satellite-based mobile phone network system 104 uses the satellite-based mobile phone terminal 101.
, The rough position is estimated based on the uplink signal from. The estimated position information is transmitted to the position notification unit 1.
At 06, for example, it is supplied to the service area switching means 204 in the terrestrial pager network system 202 via the interconnection system 400, for example, periodically. In the service area switching means 204, the rough position information of the satellite mobile phone terminal 101 supplied periodically is
Considering the rough position information of the ground pager terminal 201, if the position of the ground pager terminal is out of the service area and shifted to another service area to be roamed, this ground pager terminal 10
The transfer destination of the paging signal addressed to No. 1 is switched.

As described above, according to the embodiment of the present invention, the position information of the satellite-based mobile phone terminal obtained by the satellite-based mobile phone system is regarded as the position of the terrestrial pager terminal, and it is necessary to switch the service area. In the event that a problem occurs, the system automatically switches the service area, so that the service required when switching the service area of the conventional terrestrial paging system, for example, from the user via a public line, etc. It is possible to make the area switching request unnecessary.

In this embodiment, the position estimating means 1
05, the uplink signal transmitted from the satellite-based mobile phone terminal 101 is transmitted to the relay satellite groups 102a and 102b.
The position on the earth is estimated two-dimensionally based on the combination of the amount of propagation delay and the amount of Doppler shift that occur when reaching the earth base station groups 103a and 103b via. Alternatively, the estimation may be performed using only the propagation delay amount or the Doppler shift amount of the signal transmitted via the plurality of relay satellite groups 102a and 102b.

In this embodiment, the position estimating means 1
Although 05 is provided in the satellite-based mobile phone network system 104, the present invention is not limited thereto, and may be provided in each satellite-based mobile phone terminal 101. In this case, position estimating means 105 may perform position estimation based on, for example, the propagation delay amount or Doppler shift amount of a plurality of downlink signals via relay satellite groups 102a and 102b, or a combination thereof. Alternatively, the beam irradiation on the ground in the relay satellite groups 102a and 102b may be configured by a plurality of fine spot beams, and each satellite mobile phone terminal 101 may identify which spot beam downlink signal has been received. Thereby, the center position of the spot beam may be obtained as rough position information of the terminal.

Further, in the present embodiment, the satellite mobile phone terminal 101 and the terrestrial pager terminal 201 are respectively different terminals and carried by the same user. However, the present invention is not limited to this. In place of the system-based mobile phone terminal 101 and the terrestrial-based pager terminal 201, a combined terminal that integrates the functions of the satellite-based mobile phone terminal and the function of the terrestrial-based pager terminal is provided. You may do it.

(Embodiment 2) FIG. 2 shows a configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to a second embodiment. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals. Satellite mobile phone terminal 10
1, the relay station group 102
a, the approximate position of the own terminal is estimated using the downlink signals from the relay satellite groups 102a and 102b. Or a combination thereof.

The area information storage means 122 stores in advance the position information of the service area to which the terrestrial pager terminal 201 can support roaming.
It is configured by an OM or a SIM memory, and the position information is represented by a set of latitude / longitude information of a plurality of points on the earth. The switching request unit 123 requests a switching to the terrestrial paging system so as to switch the service area of the terrestrial pager terminal to another roamable service area. To the transmitting means for the satellite-based mobile phone system in the system-based mobile phone terminal 101,
Sent on a satellite-based mobile phone system. The service area switching means 221 in the terrestrial pager network system 202 receives a service area switching request signal of each pager terminal 201 as an input, and outputs a paging signal addressed to each pager terminal 201 based on the input switching request signal. This is for switching the transfer destination.
The other configuration in FIG. 2 differs from FIG.
The absence of the position estimating means 105 and the position notifying means 106, and, instead of the position information of the satellite portable telephone terminal 101 in the interconnection system,
1 is transferred to the ground-based paging system. Other configurations and operations are the same as those in FIG.

Operations of the satellite mobile phone system and the terrestrial paging system configured as described above, which are different from those of the first embodiment, will be described below. In the satellite mobile phone terminal 101, the approximate position of the terminal itself is estimated, for example, periodically by the position estimating means 121 using the downlink signal. Switching request means 1
In 23, the position information of the own terminal estimated by the position estimating means 121 is regarded as the position information of the terrestrial pager terminal 201, and roaming of the terrestrial pager terminal 201 stored in the area information storage means 122 in advance is possible. If it is determined that the service area of the terrestrial pager terminal 201 has deviated from the area currently being serviced and has shifted to another service area capable of roaming by comparing with the service area information, a switching request signal is generated. Then, the data is supplied to the transmitting means in the satellite mobile phone terminal 101. This switching request signal is transmitted as an uplink signal to the satellite-based mobile phone network system 104 according to, for example, a protocol for data communication in the satellite-based mobile phone system.

The switching request signal that has arrived at the satellite-based mobile phone network system 104 via the relay satellite groups 102a and 102b and the earth base station groups 103a and 103b is transmitted to the terrestrial pager network system via the interconnection system 400. The data is transferred to the service area switching means 221 in 202. The service area switching means 204 switches the transfer destination of the paging signal addressed to the terrestrial pager terminal 201 based on the service area switching request signal.

As described above, according to the second embodiment of the present invention, the satellite-based mobile phone terminal 1021 uses the position information obtained in the satellite-based mobile phone terminal 101 to provide the service of the terrestrial-based pager terminal 201. It is determined whether or not the area needs to be switched, and if it is determined that the area needs to be switched,
By making a switching request to a terrestrial paging system via a satellite mobile phone system, a service from a user via a public line or the like, which is necessary when switching the service area of a conventional terrestrial paging system, for example, It is possible to eliminate the need for an area switching request.

(Embodiment 3) FIG. 3 shows a configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to a third embodiment. 3, the same parts as those in FIG. 1 are denoted by the same reference numerals. The service area switching means 231 is provided by the service area switching means 20 of FIG.
In addition to the function of the fourth aspect, when it is determined from the position information supplied from the satellite mobile phone system that the terrestrial pager terminal is out of all service areas capable of roaming, an out-of-service area signal is output. It is a function added.

The storage means 232 stores a paging message addressed to each terrestrial pager terminal 201 in accordance with the input signal outside the service area, and is constituted by, for example, a RAM or a magnetic storage medium. The stored message transmitting unit 233 reads out the paging message stored in the storage unit 232 and supplies it to the service area switching unit 231. The operation thereof will be described below. Other configurations and operations in FIG. 3 are the same as those in FIG.

In the satellite mobile phone system and the terrestrial paging system configured as described above, the operation when the satellite mobile phone terminal 101 and the terrestrial pager terminal 201 are within the service area of the terrestrial paging system is as follows. This is the same as the case of the first embodiment in FIG.

In the following, a description will be given of an operation when both the satellite mobile phone terminal 101 and the terrestrial pager terminal 201 are outside the service area of the terrestrial paging system, unlike the first embodiment.

Network System 1 for Satellite Cellular Phone
The position estimating unit 105 in 04 estimates the approximate position of the satellite-based mobile phone terminal 101 using the uplink signal from the satellite-based mobile phone terminal 101, as in the first embodiment. The estimated position information is sent to the service area switching means 231 in the terrestrial pager network system 202 via the position notification means 106 and the interconnection system 400. In the service area switching means 231, based on the obtained position information,
It is determined whether or not the corresponding terrestrial pager terminal 201 is within the service area of the system. When it is determined that the user is in any of the roaming-capable service areas, the same operation as in the first embodiment is performed. If it is determined that the paging request is out of any of the roamable service areas, the paging request addressed to the terrestrial pager terminal is stored in the storage means 232 without sending a paging signal. Keep it. At this time, the reason why the paging target terminal is not currently in the service area may be transmitted to the user who made the paging request.

Also, based on the position information notified thereafter from the satellite-based cellular phone network system 104, the terrestrial paging terminal 201 reenters one of the roaming-capable service areas of the terrestrial paging system 200. If it is determined that the paging message has been sent, the stored message transmitting unit 233 reads the paging message stored in the storage unit 232 and supplies it to the service area switching unit 231. The paging message supplied to the service area switching means 231 is similar to the transmission of a normal paging message, and is similar to the transmission of a normal paging message. Transferred to base station group.

As described above, according to the third embodiment of the present invention, the position information of satellite portable telephone terminal 101 obtained by the satellite portable telephone system is regarded as the position of terrestrial pager terminal 201, If it is determined that the pager terminal 201 is out of the service area of the terrestrial paging system, the paging message is stored without transmitting the paging message, and is stored when the mobile terminal reenters the service area later. By transmitting the paging message, it is possible to prevent the paging message from being missed in the terrestrial paging terminal 201 and also to prevent an unnecessary increase in the terrestrial paging system.

In this embodiment, the storage means 232
Is stored in the service area 233 when the pager terminal 201 enters the service area later. However, the present invention is not limited to this. The user may request transmission via the public network. Up to this point, the information may be stored in the storage unit 232.

(Embodiment 4) FIG. 4 shows a configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to a fourth embodiment. 4, the same parts as those in FIG. 1 are denoted by the same reference numerals. The satellite-based mobile phone system 100 has a paging message transmission service similar to a terrestrial paging service in addition to a voice service similar to that in FIG.

Network System 1 for Satellite Cellular Phone
04, the message transmitting means 141 responds to the request for message transmission,
1 is transmitted. The message receiving means 142 in the satellite-based mobile phone terminal 101
From the message transmitting means 141 to the earth base station group 103a,
103b, receives a message transmitted via the relay satellite groups 102a and 102b, and supplies the received message to a man-machine interface unit in the satellite-based mobile phone 101. Here, the message to be received may be any message as long as it has the same form as that used in the terrestrial paging system 200. For example, in the case of character information,
The received message is supplied to a display, and in the case of voice information or sound information, to a speaker.

Network system 2 for ground pager
02, the message transfer requesting means 241 requests to transfer a paging message addressed to the terrestrial pager terminal 201 to the message transmitting means 141 of the satellite mobile phone system, and its operation will be described below. Other configurations and operations in FIG. 4 are the same as those in FIG.

In the satellite mobile phone system and the terrestrial paging system configured as described above, the operation when the satellite mobile phone terminal 101 and the terrestrial paging terminal 201 are within the service area of the terrestrial paging system is as follows. This is the same as the first embodiment in FIG.

In the following, a description will be given of an operation when both the satellite mobile phone terminal 101 and the terrestrial pager terminal 201 are out of the service area of the terrestrial paging system, unlike the first embodiment. Position Estimating Means 1 in Satellite Cellular Network System 104
At 05, the approximate position of the satellite-based mobile phone terminal 101 is estimated using the uplink signal from the satellite-based mobile phone terminal 101, as in the first embodiment. The estimated position information is sent to the service area switching means 204 and the message transfer request means 241 in the terrestrial pager network system 202 via the position notification means 106 and the interconnection system 400.

The message transfer requesting means 241 regards the obtained location information of the satellite portable telephone terminal 101 as the location information of the terrestrial pager terminal, and sets the corresponding terrestrial pager terminal 201 within the service area of the terrestrial paging system. To determine if you are If it is determined that the user is in any of the roaming-capable service areas, the service area switching means 204 responds to the call of the paging message addressed to the terrestrial pager terminal.
And performs the same operation as in the first embodiment. If it is determined that the mobile station is out of any of the roamable service areas, a request for transmitting a paging message addressed to the terrestrial paging terminal is sent to the satellite without transmitting the terrestrial paging system. A transfer request to be transmitted as a message addressed to the system-based mobile phone terminal 101 is output to the message transmission unit 141 in the satellite-based mobile phone network system 104 via the interconnection system 400. The message transmitting unit 141 that has received the transfer request transmits the message as a message addressed to the satellite mobile phone terminal 101.

As described above, according to the fourth embodiment of the present invention, the position information of the satellite portable telephone terminal 101 obtained by the satellite portable telephone system is regarded as the position of the terrestrial pager terminal 201, The pager terminal 201 is
If it is determined that the user is out of the service area of the terrestrial paging system, the paging message is transferred to the satellite mobile phone terminal 101 via the satellite mobile phone system, so that the terrestrial pager terminal 201 is in the service area. , The user can receive the paging message, and at the same time, it is possible to prevent an unnecessary increase in traffic in the terrestrial paging system.

In this embodiment, the satellite mobile phone system is assumed to be compatible with the paging message service. However, the present invention is not limited to this. There may be.

(Embodiment 5) FIG. 5 shows a configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to a fifth embodiment of the present invention. 5, the same parts as those in FIG. 4 are denoted by the same reference numerals. The satellite-based mobile phone system 100 has a voice service and a paging message transmission service as in the case of FIG.

ACK in Satellite Mobile Phone Terminal 101
The transmitting unit 151 transmits a reception confirmation signal (ACK signal) when the satellite mobile phone terminal 101 normally receives a paging message. The ACK transfer means 152 in the satellite-based mobile phone network system 104 is transmitted from the satellite-based mobile phone terminal 101, and includes the relay satellite groups 102a and 102b and the earth base station group 103.
a, the ACK signal received via 103b and the received A
If the CK signal is for a message transmission based on a transfer request from the terrestrial paging system, the ACK signal is sent to the message transfer request means 241 in the terrestrial pager network system 202 via the interconnection system 400. Shall be forwarded. Other configurations and operations in FIG. 5 are the same as those in FIG.

In the satellite mobile phone system and the terrestrial paging system configured as described above, the normal operation when the terrestrial paging terminal 201 is within the service area of the terrestrial paging system and the outside of the service area. In this case, the operation of transferring the paging message addressed to the terrestrial pager terminal 201 to the satellite portable telephone terminal 101 is the same as that of the fourth embodiment in FIG.

Hereinafter, an operation different from that of the fourth embodiment will be described. When the terrestrial paging terminal 201 is out of the service area of the terrestrial paging system, the transmission request of the paging message addressed to the terrestrial paging terminal 201 is sent to the message transfer requesting means 241.
Interconnection system 400, message sending means 141,
Satellite mobile phone terminal 101 via earth base station groups 103a and 103b and relay satellite groups 102a and 102b.
When the message is normally received by the message receiving unit 142 in the satellite mobile phone terminal 101, the ACK transmitting unit 151 transmits an ACK signal. AC sent
The K signal is received by the ACK receiving means 152 in the satellite-based mobile phone network system 104 via the relay satellite groups 102a and 102b and the earth base station groups 103a and 103b.

If the received ACK signal is for a paging message transfer request from the terrestrial paging system, the received ACK signal is sent to the message transfer request means 2 via the interconnection system 400.
41. The message transfer requesting means 241 makes a message transfer request to the satellite mobile phone system, and then, for example, if the ACK signal does not return within a predetermined time, makes a message retransmission request.

As described above, according to the fifth embodiment of the present invention, it is determined that terrestrial paging terminal 201 is out of the service area of the terrestrial paging system, and the paging message is transmitted to the satellite portable telephone system. When the message is transferred to the satellite-based mobile phone terminal 101 via the mobile terminal 101 or when the message is normally received by the satellite-based mobile phone terminal 101, an ACK signal is returned, and the ACK signal is transferred to the ground-based paging system. This makes it possible for the ground-based paging system to determine whether or not the transfer of the paging message has been performed normally. If the transfer has not been performed normally, the transfer request is sent to the satellite mobile phone system again. This makes it possible to improve the accuracy of paging.

In the present embodiment, the message transfer requesting means 241 makes a retransmission request in accordance with the presence or absence of an ACK reply. However, the present invention is not limited to this. ACK
If the receiving unit 152 does not return an ACK response to the message transmission within a predetermined time, a retransmission request may be made to the message transmitting unit 141.

As another method, as in the third embodiment, a storage means is provided in the terrestrial paging system, and the message transfer request means 241 does not return an ACK reply within a predetermined time. In this case, the paging message may be stored.

(Embodiment 6) FIG. 6 shows the configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to a sixth embodiment of the present invention. In FIG. 6, FIG.
The same reference numerals are given to the same parts as. The area information storage means 161 stores in advance information of a service area to which the terrestrial pager terminal 201 can support roaming, and is configured by, for example, a ROM or a SIM memory. -It shall be represented by a set of longitude information. The call connection requesting means 162 transfers a paging request to the terrestrial pager terminal 201 via the interconnection system, and its operation will be described below. Other configurations and operations in FIG. 6 are the same as those in FIG.

In the satellite mobile phone system and the terrestrial paging system configured as described above, when the satellite mobile phone terminal 101 and the terrestrial pager terminal 201 are in an area where communication with the satellite mobile phone system 100 is possible. The operation is similar to that of the first embodiment shown in FIG.

In the following, unlike the first embodiment, the user carrying both the satellite-based mobile phone terminal 101 and the terrestrial-based pager terminal 201 can use the satellite-based mobile phone, for example, inside a building or underground. The operation when the user is out of the communicable position of the system 100 will be described.

In the satellite mobile phone system 100,
When a call connection request to the satellite-based mobile phone terminal 101 is generated and a call connection with the satellite-based mobile phone terminal 101 is not established,
The call connection requesting means 162 in the satellite-based mobile phone network system 104 uses the latest location information of the satellite-based mobile phone terminal 101 estimated in the past by the location estimation means 105, and this location information is used as area information. Terrestrial pager terminal 2 of the same user associated with satellite mobile phone terminal 101 stored in storage means 161
It is checked whether or not the service area is roaming-capable 01.

If it is determined that the location information is within the service area, the fact that there is a call connection request to the satellite-based mobile phone terminal 101 is sent to the terrestrial pager terminal 201 as a paging request through the interconnection system 400. The data is transferred to the ground pager network system 202. Ground pager network system 202
The service area switching means 204 transmits the received paging request in the same manner as in the first embodiment.

As described above, according to the sixth embodiment of the present invention, the users of the satellite-based mobile phone terminal 101 and the terrestrial-based pager terminal 201 communicate with the satellite-based mobile phone system in a building or underground. If you are out of the available area,
Using a paging message of the terrestrial paging system to notify the user that a call connection request exists, thereby recognizing the call connection request to the satellite mobile phone terminal and moving to a place where the satellite can be seen. Thus, it is possible to establish a call connection with the satellite mobile phone system.

In a satellite-based mobile phone system, services can be obtained worldwide, but the link margin is small, so that in places where satellites cannot be seen, such as inside buildings, communication quality is significantly reduced. In such a case, in the sixth embodiment, the user is notified of the existence of a call connection request by utilizing the high permeability, which is one of the features of the terrestrial paging system, to thereby enable the satellite mobile phone. The disadvantages of the telephone system can be compensated.

(Embodiment 7) FIG. 7 shows the configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to a seventh embodiment of the present invention. 7, the same parts as those in FIG. 1 are denoted by the same reference numerals.

The satellite portable telephone / terrestrial pager combined terminal 301 (hereinafter simply referred to as the combined terminal 301) is the satellite portable telephone terminal 10 in the first embodiment of FIG.
1 and a function of the terrestrial pager terminal 201. For example, it may be a configuration in which two modules having respective terminal functions are housed in one housing, The baseband processing unit and the man-machine interface unit among the terminal functions may be shared.

Network system 2 for ground pager
The number assigning means 271 of the terrestrial pager terminal 201 or the combined terminal 301 (hereinafter, also referred to as the terrestrial pager terminal function 303)
) Is assigned to each of the paging messages issued to the corresponding paging message. The storage means 272
Each paging message addressed to each terrestrial pager terminal function 303 and its number are stored for a certain period of time. When a retransmission request signal for a paging message of a specific number addressed to a specific terrestrial pager terminal function 303 is input, the retransmitting unit 273 reads the corresponding paging message from the storage unit 272 and performs retransmission processing.

Retransmission request means 304 in compound terminal 301
Monitors the number assigned to the paging message received by the terrestrial pager terminal function 303, and generates a retransmission request signal for the paging message corresponding to this number when the number is missing. is there. When a retransmission request signal is transmitted from the combined terminal 301, the retransmission request transfer means 171 in the satellite-based cellular phone network system 104 transmits the retransmission request signal via the interconnection system 400 to the terrestrial pager network system 202. To be transferred to Other configurations and operations in FIG. 7 are the same as those in FIG.

In the normal operation of the satellite-based mobile phone system and the terrestrial-based paging system configured as described above, the satellite-based mobile phone terminal 101 is replaced with the satellite-based mobile phone terminal function 302, and the terrestrial-based pager terminal 201 is connected to the terrestrial pager terminal 201. It is the same as the first embodiment of FIG. 1 except that the system pager terminal function 303 is replaced.

Hereinafter, operations different from those of the first embodiment will be described. The retransmission requesting means 304 in the combined terminal 301 uses the terrestrial pager network system 2
When the terrestrial paging terminal function 303 receives a paging message transmitted from the terrestrial paging base station 203a, 203b through the terrestrial paging base stations 203a and 203b, the number assigned to the message is consecutive with the number of the message received immediately before. Check if there is. If the number is not consecutive with the immediately preceding number, it is determined that the paging message of the missing number in the middle has not been properly received, and the paging message corresponding to the missing number is determined. The transmission request of the retransmission request signal is supplied to the satellite mobile phone terminal function 302.

When the satellite portable telephone terminal function 302 transmits this retransmission request signal, the relay satellite groups 102a,
2b, transmitted to the retransmission request transfer means 171 via the earth base station groups 103a and 103b. Retransmission request transfer means 17
In step 1, the received retransmission request signal is
0, retransmission means 2 in the terrestrial paging system
Transfer to 73. When the retransmission unit 273 receives a retransmission request signal from the satellite mobile phone system, it reads out a paging message of a specific number addressed to the specific terrestrial pager terminal function 303 corresponding to this request from the storage unit 272 and performs retransmission processing. .

As described above, according to the seventh embodiment of the present invention, the number assigned to the paging message received by the function of the terrestrial pager terminal is monitored. By automatically sending a retransmission request to the terrestrial paging system via the satellite mobile phone system, it is possible to confirm the omission of paging message reception, which is difficult with the conventional terrestrial paging system, and A retransmission request can be made, and user convenience is improved.

In the present embodiment, only the retransmission request of the paging message is transmitted as a return link of the terrestrial pager terminal via the satellite mobile telephone system. However, the present invention is not limited to this. In the paging system, an ACK reply indicating whether or not the reception of the paging message has been normally completed may be performed via the satellite mobile phone system.

(Eighth Embodiment) FIG. 8 shows the configuration of a mobile communication system using a satellite portable telephone and a terrestrial pager according to an eighth embodiment of the present invention. In FIG.
The same parts as those described above are denoted by the same reference numerals. Composite terminal 301
7 is substantially the same as that shown in FIG. 382 is provided.

The position estimating means 121 is the same as that provided in the satellite portable telephone terminal 101 in the second embodiment described with reference to FIG. The roaming information storage means 381 stores in advance information of a service area in which the terrestrial pager terminal function 303 can support roaming and a frequency channel plan corresponding to this service area. The location information consists of the latitude and
It shall be represented by a set of longitude information. The channel control means 382 controls the reception channel of the terrestrial pager terminal function 303, and its operation will be described below. Other configurations and operations in FIG. 8 are the same as those in FIG.

In the normal operation of the satellite-based mobile phone system and the terrestrial paging system configured as described above, the satellite-based mobile phone terminal 101 is replaced with the satellite-based mobile phone terminal function 302, and the terrestrial-based pager terminal 201 is connected to the terrestrial pager terminal 201. It is the same as the first embodiment of FIG. 1 except that the system pager terminal function 303 is replaced.

Hereinafter, an operation different from that of the first embodiment shown in FIG. 1 will be described. Ground pager terminal function 30
If the mobile station 3 loses the current service area due to movement or the like and loses track of the channel, the channel control section 382 uses the latest location information among the location information previously estimated by the location estimation section 121 in the satellite-based mobile phone terminal function 302. things and,
Using the location information of the roaming-capable service area stored in the roaming information storage unit 381,
A frequency channel candidate corresponding to the order of the service area having a short distance is extracted, and the channel is scanned. Also,
The channel control unit 382 monitors the location information of the terminal periodically estimated by the location estimation unit 121, and the location of the terminal deviates from the current service area stored in the roaming information storage unit 381. If it is determined that the terminal has shifted to a roaming-capable service area, the mobile station switches to the frequency channel of the destination service area even if the current channel can be received.

As described above, according to the eighth embodiment of the present invention, the location information of the own terminal obtained from the satellite mobile phone terminal function 302 and the roaming service of the terrestrial paging system that is stored. Using the area information, the pager terminal function 303 can voluntarily shift the reception channel when the terminal shifts to another service area, and by interlocking with the operation of the first embodiment, , Without the user making any configuration changes,
The service area of the terrestrial pager terminal function 303 can be automatically switched.

In the present embodiment, the position estimating means 121 is provided in the function of the satellite portable telephone terminal 302 and the position information estimated by this is used. However, the present invention is not limited to this. The position information estimated by the position estimating means 105 in the mobile phone network system 104 is periodically updated by the satellite mobile phone terminal function 30.
2 may be provided with a means for notifying, and this information may be used.

[0094]

As described above, according to the present invention, terrestrial paging is achieved by utilizing the advantages of high transparency in the terrestrial paging system and the global service area and position detection function in the satellite mobile telephone system. Shortcomings such as lack of uplink means in the system and low link margin in the satellite-based mobile phone system can be mutually complemented, and the practical effect is great.

[Brief description of the drawings]

FIG. 1 is a system diagram of a mobile communication system including a satellite mobile phone and a terrestrial pager according to a first embodiment of the present invention.

FIG. 2 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to a second embodiment of the present invention.

FIG. 3 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to a third embodiment of the present invention.

FIG. 4 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to a fourth embodiment of the present invention.

FIG. 5 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to a fifth embodiment of the present invention.

FIG. 6 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to a sixth embodiment of the present invention.

FIG. 7 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to a seventh embodiment of the present invention.

FIG. 8 is a system diagram of a mobile communication system using a satellite mobile phone and a terrestrial pager according to an eighth embodiment of the present invention.

FIG. 9 is a system diagram of an example of a conventional ground-based paging system.

FIG. 10 is a system diagram of an example of a conventional satellite mobile phone system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 satellite-based mobile phone system 101 satellite-based mobile phone terminal 102 relay satellite group 103 earth base station group 104 satellite-based mobile phone network system 105, 121 position estimating means 106 position notifying means 122, 161 area information storage means 123 switching request Means 141 Message transmitting means 142 Message receiving means 151 ACK transmitting means 152 ACK transferring means 162 Call connection requesting means 171 Retransmission request transferring means 200 Terrestrial paging system 201 Terrestrial paging terminal 202 Terrestrial paging network system 203 Terrestrial paging base station Group 204, 221, 231 service area switching means 232, 272 storage means 233 stored message transmission means 241 message transfer request means 271 numbering means 273 Retransmission means 301 Combined terminal 302 Satellite mobile phone terminal function 303 Terrestrial pager terminal function 304 Retransmission request means 381 Roaming information storage means 382 Channel control means 400 Interconnection system

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kenichi Takahashi 4-3-1, Ashimashimahigashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture F-term in Matsushita Communication Industrial Co., Ltd. 5K067 AA21 BB04 BB22 DD20 DD24 DD51 EE04 EE07 EE10 FF02 GG01 HH17 HH23 HH28 JJ52 JJ71 KK15

Claims (15)

[Claims] 1. A satellite mobile phone terminal, a group of earth base stations, a group of relay satellites for relaying between the satellite mobile phone terminal and the earth base station group, and a satellite mobile phone connecting the earth base stations. A satellite-based mobile phone system constituted by a telephone network system, a terrestrial pager terminal capable of roaming in a plurality of service areas, a terrestrial paging base station group, and a terrestrial system for connecting the terrestrial paging base stations A terrestrial paging system constituted by a pager network system; and an interconnection system for connecting the satellite-based mobile phone network system and the terrestrial pager network system. A position estimating means for estimating a rough position of the satellite-based mobile phone terminal; Position notifying means for notifying the terrestrial paging system of the obtained approximate position information via the interconnection system, and the terrestrial pager network system comprises a satellite system obtained from the position notifying means. Service area switching means for treating the location information of the mobile phone terminal as the location information of the terrestrial pager terminal, determining a corresponding service area of the terrestrial pager terminal, and switching the service area of the terrestrial pager terminal. Mobile communication system using satellite mobile phones and terrestrial pagers. 2. The mobile communication system according to claim 1, wherein the position estimating means and the position notifying means are provided in a satellite-based mobile phone network system. 3. The satellite mobile phone terminal according to claim 1, wherein the location estimating means is provided in the satellite mobile phone terminal, and the location notifying means is provided in the satellite mobile phone network system.
A mobile communication system using the satellite mobile phone and the ground pager described in the above. 4. Each of the relay satellite groups relays a satellite-based mobile phone terminal and an earth base station by a plurality of spot beam configurations, and the position estimating means includes a general configuration of the satellite-based mobile phone terminal. 2. The mobile communication system according to claim 1, wherein a center position of an irradiation area of the spot beam on the earth is used as the estimated position. 5. A position estimating means for estimating a position of the satellite portable telephone terminal based on a propagation delay amount or a Doppler shift of an uplink signal transmitted from the satellite portable telephone terminal, or a combination thereof. 3. The mobile communication system according to claim 2, further comprising: a satellite-based mobile phone and a ground-based pager. 6. A position estimating means for estimating a position of a satellite portable telephone terminal based on a Doppler shift or a propagation delay amount of a downlink signal from one or a plurality of relay satellite groups or a combination thereof. 4. The mobile communication system according to claim 3, wherein the mobile communication system includes a satellite mobile phone and a terrestrial pager. 7. A satellite mobile phone terminal, a group of earth base stations, a group of relay satellites for relaying the satellite mobile phone terminal and the earth base station group, and a satellite mobile phone connecting the earth base stations. A satellite-based mobile phone system constituted by a telephone network system, a terrestrial pager terminal capable of roaming in a plurality of service areas, a terrestrial paging base station group, and a terrestrial system for connecting the terrestrial paging base stations In a mobile communication system provided with a terrestrial paging system constituted by a pager network system, and an interconnection system for connecting the satellite mobile phone network system and the terrestrial pager network system, Information on service areas in which ground-based pager terminals can support roaming Information pre-stored information, a position estimating means for estimating the approximate position of the terminal itself, and said position estimating means that the service area of the terrestrial pager terminal has shifted to another roaming-capable service area Switching request means for transmitting a request to switch the destination of the paging message to the migrated service area when the judgment is made, and responding to the switching request transmitted from the switching request means to the terrestrial pager network system. And a service area switching means for switching a service area of a terrestrial pager. 8. The service area switching means in the terrestrial pager network system, the service area switching means is provided when the position information notified from the satellite mobile phone network system is out of the service area where the terrestrial pager terminal can support roaming. Output the signal outside the area,
The network system for a terrestrial pager further comprises storage means for storing a paging message addressed to the terrestrial pager terminal without transmitting it when the out-of-service-area signal is output. Item 2. A mobile communication system using the satellite mobile phone and the terrestrial pager according to Item 1. 9. The terrestrial pager network system stores the location information notified from the satellite mobile phone network system in a storage means when the terrestrial pager terminal enters the area from outside the roaming-capable service area. 9. The mobile communication system according to claim 8, further comprising a stored message transmitting means for transmitting the stored paging message to a service area designated by the service area switching means. 10. A satellite mobile phone terminal, a group of earth base stations, a group of relay satellites for relaying between the satellite mobile phone terminal and the earth base station group, and a satellite mobile phone connecting the earth base stations. A satellite-based mobile phone system constituted by a telephone network system, a terrestrial pager terminal capable of roaming to a plurality of service areas, a terrestrial paging base station group, and a terrestrial system connecting the terrestrial paging base stations In a mobile communication system provided with a terrestrial paging system constituted by a pager network system and an interconnection system for connecting the satellite mobile phone network system and the terrestrial pager network system, System mobile phone system, a position estimation for estimating a rough position of the satellite mobile phone terminal Means, a position notifying means for notifying the terrestrial paging system of the approximate position information obtained from the position estimating means via the interconnection system, and providing a message transmission service to the satellite mobile telephone terminal. The satellite-based mobile phone terminal has message receiving means for receiving a message transmitted from the message transmitting means, and the terrestrial pager network system is obtained from the position notifying means. The terrestrial system which treats the position information of the satellite system mobile phone terminal as the position information of the terrestrial system pager terminal, determines a service area corresponding to the terrestrial system pager, and transmits a paging message addressed to the terrestrial system pager terminal. A service switch that switches between paging base stations or terrestrial paging base stations A switching means, and when a paging message transmission request to the terrestrial pager terminal occurs, the position of the satellite mobile telephone terminal notified from the position notifying means is out of the service area where the terrestrial pager terminal can roam. A mobile communication system including a satellite mobile phone and a terrestrial pager, further comprising a message transfer requesting unit for requesting a transfer of a paging message addressed to the terrestrial pager terminal to the message transmitting unit. 11. The satellite portable telephone terminal further includes an ACK transmitting means for transmitting a reply signal indicating whether or not the message has been successfully received to the earth base station group via the relay satellite group when the message is received. When a message is transmitted to the satellite-based mobile phone terminal in response to a message transfer request from the terrestrial-based paging system, the satellite-based mobile phone network system transmits a reply signal from the satellite-based mobile phone terminal to the terrestrial-based pager. 11. The mobile communication system according to claim 10, further comprising ACK transfer means for transferring the data to a network system. 12. An area information storage means for preliminarily storing information of a service area in which a terrestrial pager terminal is capable of roaming in a network system for a satellite-based mobile phone, and a call connection between the satellite-based mobile phone terminal and the satellite information mobile phone terminal is not possible. so,
And when the position information obtained from the position estimating means is within the service area stored in the area information storing means, a call connection request message to the satellite mobile telephone terminal to the terrestrial pager network system. 2. A mobile communication system according to claim 1, further comprising: a call connection requesting unit for requesting transmission of a mobile phone as a paging message. 13. A combined terminal in which a satellite mobile phone terminal function unit and a terrestrial pager terminal function unit capable of roaming in a plurality of service areas are integrated, an earth base station group,
A satellite-based mobile phone system configured by the satellite-based mobile phone terminal function unit and a relay satellite group that relays the earth base station group; a satellite-based mobile phone network system that connects the earth base stations; Terrestrial paging system comprising a group of terrestrial paging base stations and a terrestrial paging network system for connecting the terrestrial paging base stations, the satellite cell phone network system and the terrestrial pager network system And an interconnection system for connecting
The satellite-based mobile phone system includes a position estimating unit that estimates a rough position of the satellite-based mobile phone terminal function unit, and information of the rough position obtained from the position estimating unit, via the interconnection system. Location notification means for notifying the terrestrial paging system, wherein the terrestrial pager network system transmits the location information of the satellite mobile phone terminal function unit obtained from the location notification means to the terrestrial paging terminal function. A satellite-based mobile phone provided with service area switching means for determining a service area corresponding to the terrestrial pager terminal function unit by treating it as location information of the unit and switching the service area of the terrestrial pager terminal function unit. A mobile communication system using a terminal combined with a terrestrial pager. 14. A terrestrial pager network system comprising: a numbering means for sequentially numbering each paging message addressed to each terrestrial pager terminal function unit;
Storage means for storing the assigned number and the paging message for a certain period of time, and retransmission means for reading out a paging message of a specific number addressed to the terrestrial pager terminal function unit from the storage means in response to a retransmission request signal and performing retransmission processing The composite terminal has retransmission request means for requesting the satellite mobile telephone terminal function unit to transmit a paging message retransmission request signal when a missing number is found in the number of the received paging message. 14. The satellite portable telephone and terrestrial pager combined terminal according to claim 13, wherein the satellite portable telephone network system further comprises retransmission request transfer means for transferring the retransmission request signal to the retransmission means. Mobile communication system. 15. The satellite mobile phone terminal function unit of the combined terminal has position estimating means, and the terrestrial pager terminal function unit includes information on a service area in which the terrestrial pager terminal function unit can support roaming and the service. A roaming information storage means for storing in advance a plan of a frequency channel corresponding to an area, and a position obtained from the position estimating means when the channel of the current service area monitored by the terrestrial pager terminal function unit is lost. When it is determined that the current service area has left based on the estimation information, channel control means for extracting frequency channel candidates of the roamable service area from the roaming information storage means in ascending order of distance and scanning the channel are provided. 14. A satellite mobile phone and a terrestrial mobile phone according to claim 13, wherein Mobile communication system using integrated multifunction terminals.