JPH07221947A - Facsimile store and forward communication system - Google Patents

Abstract

PURPOSE:To automatically send a message of facsimile communication from an international gate station in an international maritine satellite communication system to a destination ship earth station being a destination surely without redialing. CONSTITUTION:Upon the receipt of a facsimile communication request from an international gate station 5 addressed to a ship earth station 6, when the ship earth station 6 is busy, a coast earth station 1 receives a busy state notice signal through common signaling channels 7, 7a and a marine satellite 4 from a communication network management station 3 and stores the facsimile message to a facsimile message storage section 11. When an identification section 13 receives and identifies an idle notice signal of the ship earth station 6 from the communication network management station 6, the coast earth station 1 makes a setup request to the communication network management station 3, and when a satellite channel is set from the coast earth station 1 to the ship earth station 6 through a maritine satellite 4, a facsimile message read from the facsimile message storage section 11 is sent automatically to the ship earth station 6 from a store facsimile message transmission section 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile storage communication system, and in particular, in an international maritime satellite communication system, a facsimile communication message from an international gateway station can be reliably transmitted to a destination ship earth station without recalling. The present invention relates to a possible facsimile storage communication system.

[0002]

2. Description of the Related Art Conventionally, in a facsimile communication system from an international gateway station in an international maritime satellite communication system, when a receiving ship earth station is communicating within the jurisdiction of a coast earth station or a line allocation request for facsimile communication is managed by a communication network When a notification signal indicating that a ship earth station is in communication with another coast earth station is received through a common signaling channel from the communication network management station when going to the station, the coast earth station becomes an international gateway station. Then, the communication signal of the ship earth station is returned to the end of the facsimile communication.

Therefore, while the ship earth station is communicating, a facsimile communication request from the international gateway station is recalled to the communicating ship earth station. Then, each time the call is reissued, the coast earth station makes a request for allocating the invalid facsimile communication line to the communication network management station, and the communication network management station issues a notification that the ship earth station is communicating with the common signaling channel. Are sent back through. Therefore, the Coastal Earth Station repeatedly performs the process of disabling communication with the International Gateway Station while the Ship Earth Station is in communication.

An example of a general satellite communication network is Japanese Patent Laid-Open No.
4-51726 and JP-A-63-169859.
Some of them are listed in the official gazette. The systems described in these publications are composed of a satellite earth station, a satellite line control station, and a gate station that interfaces with the satellite earth station. The satellite earth station has a facsimile message storage and automatic transmission function. Not not.

[0005]

In the conventional facsimile communication system from the international gateway station in the international maritime satellite communication system, the coast earth station is the international gateway station when the ship earth station is communicating within the jurisdiction of the coast earth station. Then, a notification signal indicating that the ship earth station is in communication is returned, and the facsimile communication is completed.

Therefore, during the period from the communication of the ship earth station to the idle state, the notification signal is returned every time there is a re-call of the facsimile communication request from the international gateway station to the ship earth station in communication. Since this is repeated, there is a problem that the effective utilization of international lines decreases.

Further, the coast earth station requests the communication network management station to allocate a line to the other ship earth station for facsimile communication, and communicates with another coast earth station via the common signaling channel of the communication network management station. When the station receives a notification that it is in communication, it sends back a notification signal indicating that the ship earth station is in communication to the international gateway station. Whenever a facsimile communication request is reissued, the coastal earth station issues an invalid facsimile communication line allocation request to the communication network management station in which the facsimile communication connection cannot be established. Therefore, the signal that the ship earth station is communicating with another coast earth station is received through the common signaling channel from the communication network management station, and the notification signal indicating that the ship earth station is communicating is repeatedly returned. The common signaling channel of the communication network management station,
There has been a problem that the effective utilization of the international line between the Coast Earth Station and the International Gateway Station is reduced.

An object of the present invention is to provide a facsimile storage communication system capable of reliably transmitting a facsimile communication message from an international gateway station to a destination ship earth station in an international maritime satellite communication system without recalling the message. Especially.

[0009]

According to the present invention, a coast earth station for controlling facsimile communication from an international gateway station for international maritime satellite communication, a ship earth station, a communication network management station, and a maritime satellite are provided. In the prepared international maritime satellite communication system,
The coast earth station stores a facsimile communication message from the international gateway station when it identifies that the other vessel earth station of the communication partner is in communication when performing facsimile communication control from the international gateway station, and thereafter. A facsimile storage communication system is provided, which is provided with means for automatically transmitting the stored message for facsimile communication when the idle state of the ship earth station of the communication partner is identified.

Further, the coast earth station discriminates an accumulating means for accumulating the message of the facsimile communication from the international gateway station and an identifying means for discriminating an empty notification signal of the destination ship earth station from the communication network management station. And when the communication network management station sets up a facsimile communication line between the coast earth station and the ship earth station in response to a line setting request from the coast earth station, transmits a stored facsimile message in the storage means. There is provided a facsimile storage communication system characterized by comprising:

Further, in response to a facsimile communication request from the international gateway station, the coast earth station requests the satellite network allocation for facsimile communication to the communication network management station when the station is communicating with the ship earth station. When receiving a notification from the communication network management station that the ship earth station is communicating with another coast earth station through a common signaling channel, the message of the facsimile communication from the international gateway station is stored in the storage means. After accumulating, the identifying means identifies the vacancy notification signal of the ship earth station from the communication network management station through the common signaling channel, and issues a line allocation request for facsimile communication from the coast earth station to the communication network management station. In accordance with the line allocation for facsimile communication from the communication network management station, The transmission unit when the millimeter communication line has been set facsimile storage communication system, characterized by automatically transmitting a message of the facsimile communication are stored in the storage unit to the ship earth station is obtained.

[0012]

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

FIG. 1 is a system block diagram of an international maritime satellite communication system showing an embodiment of a facsimile storage communication system of the present invention.

Referring to FIG. 1, the international maritime satellite communication system of this embodiment has a coast earth station 1 having a facsimile communication control function, another coast earth station 2, and a communication network management station 3.
, A maritime satellite 4, an international gateway station 5 connected to the coast earth station 1, and a ship earth station 6.

The coast earth station 1 is sent from the facsimile message storage unit 11 for storing the facsimile message received from the international gateway station 5 and the common signaling channel 7, the maritime satellite 4 and the common signaling channel 7a from the communication network management station 3. The identification unit 13 for identifying the destination ship earth station notification signal of the stored facsimile message and the facsimile message accumulated in the facsimile message accumulating unit 11 are transmitted through the communication class channel 9, the maritime satellite 4 and the communication class channel 9a. It is provided with a stored facsimile message transmission unit 12 for transmitting to the ship earth station 6, and a control unit 14 for carrying out a program processing of storage control and automatic transmission control of a facsimile message according to the identification result of the identification unit 13.

Next, the operation of this embodiment will be described.

When the coast earth station 1 receives a facsimile communication request from the international gateway station 5, the coast earth station 1 is already communicating with the ship earth station 6 or from the coast earth station 1 to the own signaling channel 8, maritime satellite. 4 and own signaling channel 8a through the common signaling channel 7, maritime satellite 4 and common signaling channel 7a from the communication network management station 3 in response to a request for line allocation to the destination ship earth station 6 issued to the communication network management station 3. When the destination ship earth station 6 receives a communication notification signal indicating that it is communicating with another coast earth station 2, the identification unit 13 identifies this, and the control unit 14 sends a facsimile message. The storage unit 11 is instructed to store the facsimile message from the international gateway station 5.

After that, when the coast earth station 1 receives a vacancy notification signal indicating the vacancy of the ship earth station 6 from the communication network management station 3 through the common signaling channel 7, the maritime satellite 4 and the common signaling channel 7a, the discriminating unit 13 recognizes this. To confirm the availability of the ship earth station 6, and transmit a line allocation request signal for facsimile communication to the communication network management station 3 through the own signaling channel 8, the maritime satellite 4 and the own signaling channel 8a.

The communication network management station 3 sets up a facsimile communication line (call class channels 9 and 9a) from the coast earth station 1 through the maritime satellite 4 to the ship earth station 6 in response to the line allocation request signal. Then, the stored facsimile message transmission unit 12 of the coastal earth station 1 reads the facsimile message from the facsimile message storage unit 11 in accordance with the instruction from the control unit 14, and sets the above-mentioned communication class channel 9, maritime satellite 4 and communication class channel 9a. Through the ship earth station 6 automatically.

According to the present embodiment having this configuration, while the destination ship earth station 6 is communicating, the facsimile message from the international gateway station 5 is accumulated at the coast earth station 1 and the ship earth station 6 is stored. Since this facsimile message is transmitted to the ship earth station 6 after it becomes free, it is not necessary for the international gateway station 5 to make a re-call to the seashore earth station 1 via the international line.

[0021]

As described above, according to the present invention, when a request is made from an international gateway station to a coast earth station which interfaces with the international earth station for a facsimile communication request to a destination ship earth station, it is possible that the ship earth station is communicating. For example, the coast earth station stores facsimile messages, requests the communication network management station for line setting when the destination ship earth station becomes empty, and sends the stored facsimile messages to this destination when this line is set. By automatically transmitting to the ship earth station of, the international gateway station does not need to call again and the originating coast earth station does not require unnecessary setting of the line that cannot be set to the communication network management station. This has the effect of reducing the load on the communication network management station and the common signaling channel.

Further, there is an effect that the satellite line of the international maritime satellite communication system and the international line from the international gateway station to the coast earth station can be effectively used.

[Brief description of drawings]

FIG. 1 is a system block diagram of an international maritime satellite communication system showing an embodiment of a facsimile storage communication system of the present invention.

[Explanation of symbols]

 1, 2 Coastal earth station 3 Communication network management station 4 Maritime satellite 5 International gateway station 6 Ship earth station 7, 7a Common signaling channel 8, 8a Own signaling channel 9, 9a Communication class channel 11 Facsimile message accumulating section 12 Accumulated facsimile message transmission Part 13 Identification part 14 Control part

Claims (3)

[Claims] 1. An international maritime satellite communication system comprising a coast earth station for controlling facsimile communication from an international gateway station of international maritime satellite communication, a ship earth station, a communication network management station, and a maritime satellite, wherein the coast The earth station accumulates a facsimile communication message from the international gateway station when it identifies that the other ship earth station of the other party is communicating when controlling the facsimile communication from the international gateway station, and then stores the communication. A facsimile storage and communication system comprising means for automatically transmitting the stored message for facsimile communication when the idle state of the partner ship earth station is identified. 2. The coast earth station discriminating means for discriminating an accumulating means for accumulating the message of the facsimile communication from the international gateway station and an availability notification signal of the destination ship earth station from the communication network managing station. And when the communication network management station sets up a facsimile communication line between the coast earth station and the ship earth station in response to a line setting request from the coast earth station, transmits a stored facsimile message in the storage means. The facsimile storage communication system according to claim 1, further comprising: 3. The coast earth station issues a satellite communication channel allocation request to the communication network management station when the station is communicating with the ship earth station in response to a facsimile communication request from the international gateway station. When receiving a notification from the communication network management station that the ship earth station is communicating with another coast earth station through a common signaling channel, the message of the facsimile communication from the international gateway station is stored in the storage means. After accumulating, the identifying means identifies the vacancy notification signal of the ship earth station from the communication network management station through the common signaling channel, and issues a line allocation request for facsimile communication from the coast earth station to the communication network management station. In accordance with the line assignment of the facsimile communication from the communication network management station, the facsimile communication with the ship earth station is performed. 3. The facsimile storage and communication system according to claim 2, wherein the transmission means automatically transmits the message of the facsimile communication stored in the storage means to the ship earth station when a communication line is set.