JP2001189959A - Wireless system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem, where a conventional wireless system disables inter-zone communication on the occurrence of a fault in a controller because a plurality of base stations to register position of each terminal in each zone is respectively connected to a controller and controlled centralizedly and increases delay, because the communication passes through the controller without fail. SOLUTION: Base station wireless units 11, 12, 13, 14 are interconnected by wired channels 1, 2, 3, 5 or wireless channels 4, 6. Terminals 16 and 17 in each zone are communicated with each other via the base station wireless units 12, 14. On the occurrence of a fault in the channel 2, communication is conducted via a bypass from the channel 1 to the channel 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital disaster prevention radio system, and more particularly to a digital local disaster prevention radio system having a plurality of base station radio apparatuses wirelessly connected to a mobile terminal, wherein each base station radio apparatus is wired or wireless with each other. Related to a directly connected wireless device.

[0002]

2. Description of the Related Art As shown in FIG.
2, 53, and 54 are connected by wire, and each base station wireless device 5
Terminals 55 and 56 are wirelessly connected to 2, 53 and 54, respectively. Each of the terminals 55 and 56 can be used in the zone of the registered base station radio device, and when entering the zone of another base station radio device, it registers again with the base station radio device. It is necessary, and the information is also held by the control device 51. Therefore, when a call is transmitted from one terminal 55 to another terminal 56, the control device 51 can transfer the call from the base station wireless device 52 to the base station wireless device 53, and the inter-zone communication becomes possible. .

[0003]

However, in the above-mentioned conventional radio system, a plurality of base station radio devices are connected to the control device in a star configuration, and a centralized control method by the control device is employed. When a failure occurs, there is a problem that communication between zones becomes impossible.
In addition, since the inter-zone communication always involves the control device, there has been a problem that a sound delay is increased.

The present invention solves such a conventional problem, and provides a wireless device capable of performing inter-zone communication without using a control device and having a small audio delay.

[0005]

SUMMARY OF THE INVENTION A radio apparatus according to the present invention comprises a plurality of base station radio apparatuses each connected to a terminal by radio and directly connected to each other by a radio line or a wired line. The station radio apparatus includes call control means for controlling a call between the base station radio apparatus and another base station radio apparatus. Inter-zone communication is possible without using a conventional control apparatus. It is possible to realize a wireless device with a small voice delay.

[0006] Further, in the radio equipment according to the present invention, the call control means monitors an abnormality of a line with each of the base station radio apparatuses, and selects and uses a detour path when a line failure occurs. Thus, reliability in the event of a line failure can be improved.

In the wireless device of the present invention, each time the call control means selects the bypass route, the call control means searches and stores the shortest route each time. Optimization can be performed.

Further, in the wireless device of the present invention, each of the base station wireless devices has a backup line in addition to the communication line normally used, and the call control means causes a failure in one of the lines. In this case, communication is performed by switching to the other line, and reliability in the event of a line failure can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 shows a configuration of a line radio switching apparatus according to Embodiment 1 of the present invention, in which a plurality of base station radio apparatuses 11, 12, 13, and 14 are connected to each other via a wired line 1,
2, 3, 5 or wireless lines 4, 6. Terminal 16 is located in zone 1 of base station radio apparatus 12. Terminal 17 is located in zone 2 of base station radio apparatus 14.
It is located in. The terminal 18 is located in the zone 3 and is connected to the base station radio 14 via the relay station radio 15 installed in the zone 2. Each base station wireless device 1
1, 12, 13, and 14 share connection information between all base station wireless devices and terminals. For example, the connection path from the base station wireless device 11 to the terminal 18 is based on the base station wireless device 11
→ line 5 → base station radio device 14 → relay station radio device 15 →
The terminal 18 knows not only the base station radio apparatus 11 but also the other base station radio apparatuses 12, 13, and 14.

FIG. 2 shows the configuration of the base station radio apparatus 11, and the other base station radio apparatuses 12, 13, and 14 have the same configuration. The inter-station units 22, 23, and 24 are connected to the call control unit 21, respectively, and the inter-station units 22, 23, and 24 are connected to the other base station radio apparatuses 12, 1 and 24, respectively.
3 and 14 are connected. The call control unit 21 has registration information of the terminals belonging to the own zone, and the base station radio apparatus 11 transmits the call control unit 21 to each base station when there is a call from the terminal in the own zone. Wireless device 12,
It communicates with the call control units 13 and 14 to select the base station wireless device to which the communication partner terminal belongs, and communicates via the inter-station unit connected to the base station wireless device.

Next, the operation of this embodiment will be described with reference to FIG. In FIG. 3, communication between the terminal 16 and the terminal 17 is normally performed on the line 2 between the base station radio apparatuses 12 and 14.
Is done using Here, the base station radio apparatus 12
The line control unit in the base station radio apparatus 12 communicates with the call control units of the base station radio apparatuses 11 and 13 when the line 2 is disconnected, monitoring line abnormalities of the respective lines. The call control units of the base station radio apparatuses 11 and 13 check the route to the base station radio apparatus 14 and return a response to the call control unit of the base station radio apparatus 12. As a result, the base station radio apparatus 12 searches for the shortest detour path according to the response, and selects the detour path of the line 1 to the line 5 as the shortest voice delay path. Thereafter, this information is transmitted to the base station radio apparatus 14 via the base station radio apparatus 11, and both the base station radio apparatuses 12 and 14 switch from the line 2 to the line 1 to the line 5. If there is another base station wireless device that has been using the line 2 as a passage route, that base station wireless device also searches for a communication route again. Thereafter, the base station wireless device 11
Confirms the destination of the data from the base station wireless device 12,
If the destination is the base station wireless device 14, the data is transferred as it is. Thereafter, the base station radio apparatuses 11, 1
2 and 14 store this route, and the connection from the base station radio apparatus 12 to the base station radio apparatus 14 is performed via the base station radio apparatus 11. When the line 2 is restored, the base station radio apparatus 12 detects this, and then communicates with the base station radio apparatus 14 using the line 2 or the line 1 to the line 5 to transmit and receive the line restoration information. If successful, the communication is performed again via the line 2. The same applies to the case where communication is performed using the relay station wireless device 15.

As described above, according to the first embodiment, a plurality of base station radio apparatuses 11, 12, 13, and 14 wirelessly connected to terminals 16, 17, and 18 are connected to each other via a wired line 1,
Connect with 2, 3, 5 or wireless lines 4, 6
Since each base station wireless device is provided with a call control means 21 for controlling a call between the base station wireless device and another base station wireless device, inter-zone communication is possible without using a conventional control device, and voice A wireless device with a small delay can be realized. In addition, since the call control means 21 monitors a line abnormality between each base station radio apparatus and selects a detour path when a line failure occurs, the reliability in the event of a line failure can be improved and the detour path can be selected. In this case, the shortest path is searched and stored each time, so that the communication path can be optimized.

Second Embodiment Next, a second embodiment of the present invention will be described. Although the overall configuration of the wireless device according to the second embodiment is the same as that shown in FIG. 1, each base station wireless device includes an inter-station unit for a backup line in addition to normal communication. I have. In the example shown in FIG. 4, between the base station radio apparatuses 11 and 12, in addition to the inter-station units 32 and 42 for the wired line 1 performing normal communication, a station for the backup radio line 10 is also provided. Intermediate units 30 and 40 are provided. This inter-office unit 30, 4
0 is similarly used for other base station radio apparatuses. In this example, the line 1 is normally used and the line 10 is used for backup. Conversely, the line 1 may be used for backup and the line 10 may be used for normal use. The units 31 and 41 are determined in advance.

In the second embodiment, the communication between the call control units 31 and 41 is performed at the time of activation of each base station radio apparatus, thereby establishing the line 1 having a higher priority. If line 1 cannot be established here,
The line is established using the backup line 10 or both lines 1 and 10. Normally, communication is performed using the line 1 having a higher priority. However, when an abnormality such as disconnection occurs in the line 1, the call control unit 31 first changes the connection to the backup wireless line 10 and calls the Control unit 4
1 and the line change information. Call control units 31, 4
After both 1 have received the line change information, the change from line 1 to line 10 is completed. Thereafter, the base station wireless device 1
The lines 1 and 12 store the line change information, and thereafter perform communication using the line 10. When an abnormality occurs in the line 10, the detour path as described in FIG. 3 is selected, and in this case, the line 5 and the line 2 are selected. When the line 1 is recovered, the base station wireless device 11 detects this, and then communicates with the base station wireless device 12 using the line 1 to send line recovery information. Both base station radio apparatuses 11 and 12 confirm the restoration of the line 1, and if the transmission and reception of the line restoration information succeeds, the communication is performed again through the line 1.

As described above, according to the second embodiment, each base station radio apparatus has a backup line in addition to a normally used line, and when a failure occurs in the normal line, Since communication is performed using the backup line, the reliability of communication can be improved.

[0016]

As described above, according to the present invention, a plurality of base station radio apparatuses wirelessly connected to a terminal are directly connected to each other by a radio line or a wired line, and each base station radio apparatus is connected to another terminal. Characterized by comprising a call control means for controlling a call between the base station wireless device,
Inter-zone communication is possible without using a conventional control device, and a wireless device with little voice delay can be realized.

Further, according to the present invention, the call control means monitors a line abnormality between each base station radio apparatus and selects a detour path or a backup line when a line failure occurs. The reliability at the time can be improved, and the shortest route is searched and selected each time a bypass route is selected, so that the communication route can be optimized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a wireless device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a base station radio apparatus according to an embodiment of the present invention.

FIG. 3 is a block diagram of a line switching device showing an operation according to the embodiment of the present invention.

FIG. 4 is a block diagram showing a schematic configuration of a base station radio apparatus according to an embodiment of the present invention.

FIG. 5 is a block diagram showing a schematic configuration of a conventional base station radio apparatus.

[Explanation of symbols]

1, 2, 3, 4, 5 lines 10 Backup lines 11, 12, 13, 14 Base station radio equipment 15 Relay station radio equipment 16, 17, 18 Terminal 21, 31, 41 Call control units 22, 23, 24, 30, 32, 33, 40, 42, 4
Unit between 3 stations

Claims (4)

[Claims] 1. A wireless communication system comprising: a plurality of base station wireless devices, each connected to a terminal wirelessly, and each connected directly to each other by a wireless line or a wired line;
A wireless device comprising call control means for controlling a call to another base station wireless device. 2. The system according to claim 1, wherein said call control means monitors an abnormality of a line with each of said base station radio apparatuses, and selects and uses a detour path when a line failure occurs. Wireless device. 3. The wireless device according to claim 2, wherein the call control means searches and stores the shortest route each time the alternative route is selected. 4. Each of the base station radio apparatuses has a backup line in addition to a normally used communication line, and the call control means transmits a call to the other line when a failure occurs in one of the lines. The communication is performed by switching.
4. The wireless device according to any one of claims 1 to 3.