JP2002171563A - Communication route connection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication route connection system that can select a communication route in a short time for route setup in a district disaster preventing wireless system consisting of a control station, general stations and an relay station that ensures a service area with respect to the control section. SOLUTION: Each general station is connected with or incorporates a GPS receiver/antenna, transmits position information of itself to the control station or the relay station. The control station and the relay station store position information of each general station and share the position information with each other. Since the control station and the relay station can confirm a location of a called station when a caller station selects a communication route to the called station, the control station and the relay station analyze the communication route and transmit communication route information to the caller station to allow the call station to automatically select the communication route to the called station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to line connection in an optimal communication route in a wireless system.

[0002]

2. Description of the Related Art Individual communication in a wireless system such as a regional disaster prevention wireless system will be described as an example of a communication route selection method in a conventional wireless system.

FIG. 2 is a block diagram showing a circuit connection method of a communication route in a conventional wireless system. When the general station 4 communicates with the general station 5 existing in its own station zone (within the communication area of the general station 4) in which it can communicate by its own direct communication route, the general station 4 on the calling side (hereinafter referred to as the calling station) Name.)
4 transmits a line connection request signal 9 on a control channel. Upon receiving the line connection request signal 9 on the control channel, the general station 5 on the called side (hereinafter called the called station) transmits an ACK signal (response signal; hereinafter, referred to as an ACK signal) 10. When the calling station 4 receives the ACK signal 10 transmitted by the called station 5, it can determine that the called station 5 exists in its own zone of the calling station 4, so that the calling station 4 and the called station 5 can be determined. Can switch to a communication channel and communicate with a direct communication route. For example, the voice signal 11 can be transmitted directly from the calling station 4 to the called station 5 and vice versa.

[0004] The calling station 4 does not exist in its own station zone (within the communication area of the general station 4) in which it can communicate via its own direct communication route, but can communicate via the relay station 2 (the relay zone of the relay station 2). When communicating with the called station 6 existing within the communication area), the calling station 4 transmits the line connection request signal 9 on the control channel as described above. Since the called station 6 does not exist in the zone of the calling station 4, the calling station 4 cannot receive the line connection request signal 9 transmitted through the control channel. The calling station 4 waits for an ACK signal from the called station 6 for a fixed time, and if the ACK signal from the called station 6 is not received during this waiting time,
The line connection request signal 13 is transmitted on the relay control channel.
When receiving the line connection request signal 13 transmitted by the calling station 4, the relay station 2 transmits a line connection request signal 16 on the control channel. Upon receiving the line connection request signal 16, the called station 6 transmits an ACK signal 17 via the relay station 2. When the calling station 4 receives the ACK signal 17 transmitted by the called station 6, it can determine that the called station 6 exists in the relay zone of the relay station 2, so that the calling station 4 and the called station 6 perform the approach. It is possible to switch to the relay communication channel and communicate on the approach relay route. For example, voice signals can be transmitted from the calling station 4 to the called station 6 via the relay station 2, and vice versa from the called station 6 to the calling station 4 via the relay station 2. (15 is a voice signal between the calling station 4 and the relay station 2, and 16 is a voice signal between the relay station 2 and the called station 6.) The calling station 4 can communicate via its own direct communication route. It does not exist in the station zone (within the communication area of the general station 4) and the relay zone in which communication is possible via the relay station 2 (within the communication area of the relay station 2), and is communicable via the relay station 2 and the relay station 3. Called station 7 existing in a simple relay zone (communication area of relay station 3)
When the communication is performed, the calling station 4 transmits a line connection request signal 9 through the control channel 9 as described above. Since the called station 7 does not exist in the zone of the calling station 4, the calling station 4 cannot receive the line connection request signal 9 transmitted through the control channel. The calling station 4 waits for an ACK signal from the called station 7 for a certain period of time, and if it does not receive an ACK signal from the called station 7 during this standby time, transmits the line connection request signal 13 on the relay control channel. . When receiving the line connection request signal 13 transmitted by the calling station 4, the relay station 2 transmits a line connection request signal 16 on the control channel. Since the called station 7 does not exist in the relay zone of the relay station 2, the relay station 2 cannot receive the line connection request signal 16 transmitted on the control channel. The calling station 4 waits for an ACK signal from the called station 7 again for a certain period of time.
If the K signal is not received, the line connection request signal 13 is transmitted again through the relay control channel. When receiving the line connection request signal 13 transmitted by the calling station 4, the relay station 2 transmits a line connection request signal 22 on the link relay channel. Relay station 3
Receives the line connection request signal 22 transmitted by the relay station 2, transmits the line connection request signal 19 on the control channel.
When the called station 7 receives the line connection request signal 19,
The signal 20 is transmitted via the relay station 3 and the relay station 2. When the calling station 4 receives the ACK signal 20 transmitted by the called station 7, it can determine that the called station 7 exists in the relay zone of the relay station 3, so that the calling station 4 and the called station 7 perform the approach. Switching to the relay communication channel and relay stations 2 and 3
Communication can be performed by a link relay route for switching to a link relay control channel. For example, a voice signal is transmitted from the calling station 4 to the called station 6 via the relay station 2 and the relay station 3, and conversely, from the called station 6 to the calling station 4 via the relay station 3 and the relay station 2. We can meet each other. (15 is a voice signal between the calling station 4 and the relay station 2, 24 is a voice signal between the relay station 2 and the relay station 3, and 19 is a voice signal between the relay station 3 and the called station 7.)

[0005]

In the above-mentioned prior art,
In a wireless system, there is a disadvantage that the longer the number of relay stations installed, the longer the time required for line connection to be established through an optimal communication route during communication between the control station and general stations and between general stations.

SUMMARY OF THE INVENTION The present invention solves these drawbacks, and enables communication routes to be connected in a short time in an optimal communication route between a control station and general stations and between general stations in a wireless system. The purpose is to provide a scheme.

[0007]

In order to achieve the above object, the present invention provides a GPS receiver and a GPS antenna in each general station so that each general station can grasp its own position. It is like that. Then, the position information of each general station is transmitted to the control station and the relay station at regular intervals, and the position information of each general station received by the control station and the relay station is stored. Then, by synchronizing between the control station and the relay station, the position information of each general station is shared, so that when the calling station is connected to a line with any called station, the control station and the relay station receive a call. This allows the location of the call station to be confirmed. As a result, the control station and the relay station analyze the optimum communication route between the calling station and the called station, and transmit the optimum communication route information to the calling station. Automatically connecting a line to an arbitrary called station through a communication route can be performed in a short time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A communication route line connection system in a wireless system according to an embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram illustrating a line connection method of a communication route in the wireless system according to the present embodiment.

General stations 4 to 7 are provided with GPS (Global Positioni).
ng System) receiver and a GPS antenna are provided, and by receiving the data signal 23 from the GPS satellite 8 from the GPS antenna, the general stations 4 to 7 can grasp the position of the own station. General stations use the polling method (control station 1
And a method of inquiring at regular intervals whether or not there is a transmission request from the relay stations 2 and 3 to the general stations 4 to 7) or an arbitrary calling method (from the control station 1 and the relay stations 2 and 3 to the general stations 4 to 7).
(A method of constantly monitoring whether or not there is a transmission request to the control station 1). In the control station 1 and the relay stations 2 and 3, the general stations 4 to 7
The control station 1 and the relay stations 2 and 3 synchronize and receive the position information from the general stations 4 to 7 and share the position information of the general stations 4 to 7. Since the control station 1 and the relay stations 2 and 3 are installed at fixed locations, the range of the own station zone of the control station 1 and the range of the relay zone of the relay stations 2 and 3 can be determined in advance. If the position of the calling station (general station on the calling side) and the position of an arbitrary called station (general station on the called side) are known, it is possible to automatically perform line connection on an optimal communication route in a short time.

With regard to the line connection method of the communication route in the wireless system of the present embodiment, individual communication in a wireless system such as a regional disaster prevention wireless system will be described. A called station (general station on the called side) 5 which exists in its own zone (within the communication area of the general station 4) in which the calling station (general station on the calling side) 4 can communicate by its own direct communication route. When communicating, the calling station 4 transmits the line connection request signals 9 and 13 on the control channel and the relay control channel. When receiving the line connection request signal 9 on the control channel, the called station 5 transmits an ACK signal (response signal) 10. If the control station 1 and the relay station 2 exist in the local zone where communication can be performed on the direct communication route of the calling station 4, the control station 1 receives the line connection request signal 9 and the relay station 2 transmits the line connection request signal. The signal 13 is received, and the location information of the calling station 4 and the called station 5 is analyzed. Then, an optimal communication route between the calling station 4 and the called station 5 is selected,
A including communication route information between the calling station 4 and the called station 5
CK signals 12 and 14 are transmitted. When the calling station 4 receives the ACK signal 10 transmitted by the called station 5, the ACK signal 12 transmitted by the control station 1, and the ACK signal 14 transmitted by the relay station 2, the called station 5 Since it can be determined that the calling station is present in the station zone, the calling station 4 and the called station 5 can switch to the communication channel 11 and communicate with each other through a direct communication route. For example, the voice signal 11 can be transmitted directly from the calling station 4 to the called station 5 and vice versa.

The calling station 4 does not exist in its own station zone (communication area of the general station 4) in which it can communicate via its own direct communication route, but can communicate through the relay station 2 (communication of the relay station 2). When communicating with the called station 6 existing in the area (A), the calling station 4 transmits the line connection request signals 9 and 13 on the control channel and the relay control channel as described above. Since the called station 6 does not exist in the zone of the calling station 4, the calling station 4 cannot receive the line connection request signal 9 transmitted through the control channel. Further, when the control station 1 and the relay station 2 exist in the own station zone in which communication is possible in the direct communication route of the calling station 4, the control station 1 receives the line connection request signal 9 and
The relay station 2 receives the line connection request signal 13 on the relay control channel, and analyzes the location information of the calling station 4 and the called station 6.
Then, an optimal communication route between the calling station 4 and the called station 6 is selected. The control station 1 transmits an ACK signal 12 including communication route information between the calling station 4 and the called station 6. Since the relay station 2 can determine that the called station 6 exists in its own relay zone, it transmits the line connection request signal 16 on the control channel. When receiving the line connection request signal 16 on the control channel, the called station 6 transmits an ACK signal 17 to the calling station 4 via the relay station 2. Calling station 4 sends A to control station 1
Upon receiving the CK signal 12 and the ACK signal 17 transmitted by the called station 6 via the relay station 2, the signal analysis is performed and the called station 6
Can be determined to be present in the relay zone of the relay station 2, the calling station 4 and the called station 6 switch to the approach relay communication channel, and use the approach relay route (communication route via one relay station). Can communicate.

The calling station 4 can communicate via its own direct communication route in its own zone (in the communication area of the general station 4) and in the relay zone in which it can communicate via the relay station 2 (in the communication area of the relay station 2). ), And communicates with the called station 7 existing in the relay zone (communication area of the relay station 3) communicable via the relay station 2 and the relay station 3, as described above. Transmits the line connection request signals 9 and 13 on the control channel and the relay control channel. Since the called station 7 does not exist in the zone of the calling station 4, the calling station 4 cannot receive the line connection request signal 9 transmitted on the control channel. Further, when the control station 1 and the relay station 2 exist in the local station zone in which communication can be performed on the direct communication route of the calling station 4, the control station 1 receives the line connection request signal 9 through the control channel and the relay station 2 Receives the line connection request signal 13 on the relay control channel and analyzes the location information of the calling station 4 and the called station 7. Then, an optimal communication route between the calling station 4 and the called station 7 is selected. The control station 1 transmits an ACK signal 12 including communication route information between the calling station 4 and the called station 7. The relay station 2 determines that the called station 7 does not exist in the relay zone of the own station but exists in the relay station 3, and therefore transmits the line connection request signal 22 through the link relay channel. When the relay station 3 receives the line connection request signal 22 transmitted by the relay station 2,
Since it can be determined that the called station 7 exists in its own relay zone, the line connection request signal 19 is transmitted on the control channel. Upon receiving the line connection request signal 19 on the control channel, the called station 7 transmits an ACK signal 20 to the calling station 4 via the relay station 3 and the relay station 2. Calling station 4 sends A to control station 1
When the CK signal 12 and the ACK signal 20 transmitted by the called station 7 are received, signal analysis is performed to determine that the called station 6 exists in the relay zone of the relay station 3. 7 switches to the approach relay communication channel, and switches between the relay stations 2 and 3 to the link relay channel. As a result, communication can be performed on a link relay route (a communication route passing through a plurality of relay stations). For example,
The voice signal is transmitted from the calling station 4 to the called station 6 via the relay station 2 and the relay station 3, and conversely, from the called station 6 to the calling station 4 via the relay station 3 and the relay station 2. be able to. (15 is a voice signal between the calling station 4 and the relay station 2, 24 is a voice signal between the relay station 2 and the relay station 3, and 19 is a voice signal between the relay station 3 and the called station 7.) When 1 is the calling station, the location information of the general stations 4 to 7 is stored, so that the own station can determine the optimum communication route with any general station to be called. A line connection with an arbitrary general station can be made in a short time.

According to the present invention, in addition to the individual communication between general stations in the wireless system shown in the above-described embodiment, the present invention is suitable for one-to-one individual communication such as individual communication performed between a control station and a general station. It is most suitable for line connection in a simple communication route.

[0014]

As described above, according to the present invention, it is possible to reduce the time required for line connection between the control station and the general stations and between the general stations in the wireless system by using an optimum communication route. In particular, when the number of relay stations installed in the regional disaster prevention wireless system increases, the effect of the present invention increases.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing one embodiment of the prior art.

[Explanation of symbols]

1: Control station, 2, 3: Relay station, 4-7: General station, 8: G
PS satellite, 9, 16, 19: line connection request signal (control channel), 10, 12, 14, 17, 20: ACK signal, 11: voice signal (communication channel), 13: line connection request signal (relay control channel) ), 15, 18, 21: voice signal (approach relay channel), 22: line connection request signal (link relay channel), 23: data signal, 2
4: Voice signal (link relay channel).

Claims (1)

[Claims] 1. A control station comprising: a control station; a relay station connected to the control station via a wireless line; and a plurality of general stations connected to the control station or the relay station via a wireless line. The station is provided with a GPS receiver, and in a communication route connection system of a wireless system for grasping the position information of the station, the general station transmits the position information to the control station or the relay station having a communication area in which the station is located. To the station,
When the control station and the relay station synchronize and transmit and receive the location information to each other and share the general station or the control station calls a predetermined general station, the control station and the relay station make a call. The optimal communication route information with the general station that is the called station is transmitted to the general station or the controlling station that has become the calling station, and the general station or the controlling station that has become the calling station and the general that has become the called station. A communication route connection method wherein a line connection with an optimal communication route with a station is automatically performed.