JPH0746658A - Mobile object exchange system - Google Patents

Abstract

PURPOSE:To detect a fault in an early stage by setting the state of whether the monitoring signal of a radio base station is normal or abnormal on a signal to be transmitted from the radio base station to an exchange, transmitting it and reading the state by the exchange. CONSTITUTION:The exchange 1 periodically confirms call origination and call termination states from the radio base stations 13 and judges whether or not the base station 13 without call origination and call termination is present. When the base station 13 without call origination and the call termination is present, a call connection signal for a health check is edited and transmitted to the pertinent base station 13. The base station 13 which receives the call connection signal judges whether or not it is the call connection signal for the health check, and when it is the call connection signal for the health check, confirms the state of the present station, sets the state of the present station to the user/user information of a response signal and performs transmission to the exchange 11. The exchange 11 which receives the response signal judges the state by the user/user information and informs a maintenance person of that the base station 13 is in the state of the fault when abnormality is present.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for detecting a fault in a radio base station. The present invention relates to a mobile switching system capable of detecting a failure of a wireless base station in a network that does not have a direct connection line between a wireless base station and a switching center connected via a public network.

[0002]

2. Description of the Related Art Conventionally, in the case of a network in which a public network is interposed between a switching center and a radio base station, a health check can be performed when a line is established between the stations, but a state where no connection is established. There was no system that could do a health check in. (See Japanese Patent Publication No. 2-62188)

[0003]

Conventionally, when a public network is interposed between a switching center and a wireless base station in a network of a mobile switching system, the health check of the wireless base station collects the state of the wireless base station between the stations. There was a problem that I could not do because there was no line to do.

The present invention solves such a problem, and in a network through a public network, a health check of a radio base station can be performed by a switching center, whereby a failure can be detected early. The purpose is to provide a system that can.

[0005]

The present invention provides a mobile switching system comprising a switching center and a plurality of radio base stations connected to the switching center via a public network and communicating with mobile terminals, Each of the radio base stations is provided with means for setting a state of whether the monitoring signal of the radio base station is normal or abnormal on a signal transmitted and received to and from the exchange,
The exchange, monitoring the condition set on the signal,
It is characterized by comprising means for detecting the occurrence of a failure in the radio base station.

[0006] The switching center, when no signal is transmitted / received to / from the radio base station for a certain period of time, determines that the radio base station concerned has a fault suspected device, and autonomously inquires about its status. And the transmitted and received signals are CCI transmitted and received between the exchange and the radio base station.
It is desirable that the signal is a call setting signal according to the protocol defined in TT (International Telegraph and Telephone Consultative Committee) standard Q931.

[0007]

When a call exists between the exchange and the radio base station, the device state of the radio base station is set on the signal transmitted from the radio base station to the exchange, and the signal is transmitted. Read state to detect failure. When no signal is transmitted or received between the exchange and the radio base station for a certain period of time, the exchange determines that the radio base station has a device suspected of failure and inquires about its status autonomously.

As a result, in the network via the public network, the health check of the radio base station can be carried out by the exchange, and the failure can be detected early.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention.

The embodiment of the present invention comprises an exchange station 11 and a plurality of radio base stations 13 connected to the exchange station 11 via a public network 12 and communicating with a mobile terminal 15. Further, the radio base station is provided. 13 is provided with means for setting the state of whether the monitoring signal of the radio base station 13 is normal or abnormal on the signal transmitted / received to / from the exchange station 11, and the exchange station 11 is provided with the signal. Means for monitoring the state set above and detecting the occurrence of a fault in the radio base station is further provided, and the switching center 11 further transmits and receives signals to and from the radio base station 13 for a certain period of time, The wireless base station 13 is provided with a means for judging that there is a device suspected of failure and autonomously inquiring its status.

From the radio base station 13 to the switching center 11 during call processing
As shown in FIG. 2, the message format when the call setup signal to the user is used for the health check is as follows: protocol identifier, call number, message type, transmission capability, and user user health check result: OK / NG (hereinafter referred to as user user Information). This signal is C
It is set in the user user information field of the call setup signal in the CITT-Q931 protocol.

When a call is made from the mobile terminal 15, the wireless base station 13 sends a call setting signal in which the device state of the wireless base station 13 is set in the user information via the public network 12, as shown in FIG. And sends it to the exchange 11. Radio base station 13
The switching center 11 which has received the call connection signal from determines the device state of the wireless base station 13 based on the user information in the signal.

FIG. 4 is a flow chart showing the flow of the operation when the normal call control in the embodiment of the present invention is used for the health check of the radio base station.

When a call request is issued to the wireless base station 13,
The wireless base station 13 confirms the status of the local station, sets the status of the local station in the user user information of the call connection signal, and transmits it to the exchange station 11. The exchange station 11 receives this signal and determines whether the state is normal or abnormal according to the user user information for which the own station state is set. If it is abnormal, the maintenance person is notified that the wireless base station 13 is in a failure state.

Next, the operation when there is no call from the radio base station 13 will be described.

FIGS. 5 (a) and 5 (b) are diagrams showing the structure of a message format transmitted to a wireless station which has not made a call for a certain period in the embodiment of the present invention. FIG. 1A shows the structure of the format transmitted from the exchange 11 to the radio base station 13, and includes a protocol identifier, a call number, a message type, a transmission capability, and a user / user health check request. Further, FIG. 2B shows a format transmitted from the wireless base station 13 to the exchange 11. The protocol identifier, call number, message type, and user user health check result: NG /
OK (hereinafter referred to as user user information) is included.

As shown in FIG. 6, the switching center 11 detects from the traffic information of the radio base station 13 to be managed that there is no call or call, and the base station 13 that has not called or call for a certain period of time. Regarding, it is judged that it is a device suspected of failure,
The switching station 11 issues a call connection signal for status inquiry to the base station 13. Upon receiving the call connection signal for inquiring about the status, the wireless base station 13 sets the status of the base station 13 in the user user information of the response signal and transmits it to the switching center 11. The exchange 11 which has received the response signal detects the state of the radio base station 13 based on the user user information.

FIG. 7 is a flow chart showing the flow of the health check operation when there is no call from the radio base station in the embodiment of the present invention.

In this case, the switching center 11 periodically checks the call origination and the call termination status from the radio base station 13 and determines whether or not there is the radio base station 13 having no call origination or call termination. If there is a wireless base station 13 that does not make or receive a call, the call connection signal for health check is edited and transmitted to the corresponding wireless base station 13.

The radio base station 13 receiving the call connection signal,
Determine if it is a call connection signal for health check,
If it is not a call connection signal for health check, normal call processing is performed. If it is a call connection signal for health check, the state of the local station is confirmed, the state of the local station is set in the user user information of the response signal, and the signal is transmitted to the exchange 11.

The exchange 11 which has received the response signal determines the state from the user information, and when there is an abnormality, notifies the maintenance person that the radio base station 13 is in a faulty state.

[0022]

As described above, the present invention has an effect that a health check of a wireless base station is performed at a switching center in a network via a public network, and a failure can be detected early.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a message format configuration when a call setting signal from a wireless base station to a switching center is used for health check during call processing in the embodiment of the present invention.

FIG. 3 is a diagram showing a flow of a call setting signal and a fault notification in the embodiment of the present invention.

FIG. 4 is a flowchart showing a flow of operations when normal call control in the embodiment of the present invention is used for health check of a wireless base station.

5A and 5B are diagrams showing the structure of a message format transmitted to a radio base station which has not been called for a certain period of time according to an embodiment of the present invention.

FIG. 6 is a diagram showing flows of a call setting signal and a response signal between a wireless base station and a switching center which have not made a call for a certain period in the embodiment of the present invention.

FIG. 7 is a flowchart showing the flow of a health check operation when there is no call from the wireless base station in the embodiment of the present invention.

[Explanation of symbols]

 11 Switching Center 12 Public Network 13 Radio Base Station 15 Mobile Terminal

Claims (3)

[Claims] 1. A mobile switching system comprising a switching center and a plurality of wireless base stations connected to the switching center via a public network and communicating with mobile terminals, wherein each of the wireless base stations has the A means for setting the state of whether the monitoring signal of the radio base station is normal or abnormal on the signal transmitted / received to / from the exchange, the exchange set to the state set on the signal To monitor
A mobile switching system comprising means for detecting the occurrence of a fault in the radio base station. 2. The exchange, when no signal is transmitted / received to / from the radio base station for a certain period of time, determines that the corresponding radio base station has a fault suspected device and inquires about its status autonomously. The mobile object exchange system according to claim 1, further comprising means. 3. The transmitted / received signal is a call setting signal according to the protocol defined in CCITT (International Telegraph and Telephone Consultative Committee) standard Q931 transmitted / received between the exchange and the radio base station. Item 2. The mobile object exchange system according to Item 1.