JP2011030094A - Radio communication system for traveling body and failure processing method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately and instantaneously notify a radio base station monitoring device of the failure of a radio base station. <P>SOLUTION: In the radio communication system of traveling object, a radio terminal obtains the failure information of a radio base station in which any failure is generated, and stores it in the storage means of the radio terminal, and when the radio base station to which the radio terminal is connected is abnormal, the other radio base station is retrieved by the radio terminal, and when the radio terminal is connected to the normal radio base station, the failure information stored in the storage means is transmitted from the radio terminal to a failure information receiver. The failure information receiver receives the failure information of the radio base station transmitted from the radio terminal, and generates a warning based on the failure information, and notifies the radio base station monitoring device of the warning. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile radio communication system and a failure processing method thereof, and more particularly, to a technique for detecting a failure occurring in a radio base station in a mobile radio communication system and notifying the failure information to a radio base station control device. .

The mobile radio communication system includes a radio terminal that a user uses while moving, a radio base station that performs radio communication with the radio terminal, and a radio base station monitoring device that monitors and controls the radio base station. In this mobile radio communication system, when a failure occurs in the radio base station, the radio base station uses the monitoring function of the radio base station itself to monitor the failure information as an alarm via the maintenance network. Notify the device.
The radio base station monitoring apparatus analyzes the alarm notified from the base station, displays the result on a maintenance monitoring screen of the radio base station monitoring apparatus, and notifies the maintenance person of failure information of the radio base station.

However, there is a failure in which communication processing (call processing) between the wireless base station and the wireless terminal is impossible even though the monitoring function of the wireless base station device itself has not detected the failure. Examples of such failures include failures that are not envisioned by the radio base station development designer, or failures that the radio base station software and hardware do not operate as designed, and the radio base station device cannot correctly recognize as failures. , Etc. can be considered.
Conventionally, as a means for detecting such a failure, a search for abnormal call processing is retrieved from the call processing history collected from each radio base station, or a call connection test is performed on all radio base stations using a test terminal. Are regularly monitored.

However, in the method of detecting the abnormal call processing history from the call processing history, it is necessary to search a log indicating abnormality from a huge call processing history, which takes a great deal of human labor.
In addition, the call connection test is performed periodically because the call processing resources are used for the test, so it is limited to the frequency of use, such as once per day during nighttime periods when user traffic is low. Comes out. As a result, failure detection is delayed and the radio base station in an abnormal state is left for a long time.
As a failure detection method for solving the above-described problems, Patent Literature 1 and Patent Literature 2 disclose a method of automatically detecting a failure by detecting a decrease in the normal completion rate of call processing. Yes.

JP 2005-086454 A JP 2004-274595 A

In the above failure detection to detect a decrease in the normal completion rate of call processing, human labor is eased from the viewpoint of automatic detection, but the call volume of the radio base station is the place and time where the radio base station is installed, Since it varies depending on the day of the week, a decrease in the normal call processing rate is not necessarily a failure of the device, and the failure cannot be determined accurately.
As a means for solving this problem, a method is considered in which past statistical information is dynamically reflected in a normal estimation threshold value to improve the accuracy of failure determination. However, since the statistical information is estimated, there is no false detection, and it is necessary to make a judgment based on data for a long time (several hours to several tens of hours) particularly in an area where the call volume is low. In addition, the statistical information to be determined for the failure determination in units of radio base stations is enormous, and immediacy is lost due to an increase in processing amount. Furthermore, although call processing data can be acquired, if there is some failure between the radio base station and the radio base station monitoring device and communication is difficult, the failure information cannot be notified to the radio base station monitoring device.

  An object of the present invention is to detect a failure occurring in a radio base station and to notify the radio base station monitoring apparatus accurately and immediately.

The present invention preferably includes a plurality of radio terminals, a plurality of radio base stations connected to the radio terminals for communication, and the radio base stations connected to the plurality of radio base stations via a network. In a mobile radio communication system including a management device that manages information on a failure situation,
The wireless terminal; holding means for storing failure information of the wireless base station in which a failure has occurred; search means for searching for another wireless base station when the wireless base station to which the wireless terminal is trying to connect is abnormal And a transmission means for transmitting the failure information held in the holding means to the management device when connected to a normal radio base station according to the search of the search means,
The management apparatus includes: reception means for receiving failure information of the wireless base station transmitted from the wireless terminal; and alarm generation means for generating an alarm based on the received failure information. It is configured as a mobile radio communication system.

In a preferred example, as the management device, a radio base station monitoring device connected to the plurality of radio base stations via a network, and a failure information receiving device connected to the plurality of radio base stations via a network Including
The wireless terminal transmits the failure information to the failure information receiving device using the transmission means,
The failure information receiving apparatus has the receiving means, the alarm generating means, and a notification means for notifying the radio base station monitoring apparatus of an alarm generated by the alarm generating means,
The radio base station monitoring device monitors the status of a plurality of the radio base stations, and displays information on the radio base station in which the fault has occurred indicated by the alarm transmitted from the fault information receiving device on a display unit. It is a mobile radio communication system.

The failure processing method according to the present invention is preferably connected to a plurality of radio terminals, a plurality of radio base stations connected to the radio terminals for communication, and the plurality of radio base stations via a network. A failure processing method in a mobile radio communication system including a management device for managing information on a failure status of a radio base station,
In the radio terminal, acquiring fault information of the radio base station in which a fault has occurred and storing it in the storage means; and if the radio base station to which the radio terminal is trying to connect is abnormal, another radio base station And when the result of the search is that the wireless terminal is connected to a normal wireless base station, the failure information held in the storage means is transmitted to the management device via the wireless base station. A step of receiving the failure information of the wireless base station transmitted from the wireless terminal in the management device, and generating a warning based on the received failure information in the management device. It is configured as a failure processing method characterized by this.

The failure processing method according to the present invention preferably includes a plurality of wireless terminals, a plurality of wireless base stations that wirelessly communicate with the wireless terminals, and a wireless that is connected to the plurality of wireless base stations via a maintenance network. A failure processing method in a mobile radio communication system including a base station monitoring device and a failure information receiving device connected to the plurality of radio base stations via a communication network,
Acquiring fault information of the radio base station where the fault has occurred and storing the fault information in the storage means of the radio terminal; and if the radio base station to which the radio terminal is connected is abnormal, A step of searching for a base station, and when the result of the search is that the wireless terminal is connected to a normal wireless base station, the failure information stored in the storage means is transmitted from the wireless terminal to the failure information receiving device A step of receiving failure information of the wireless base station transmitted from the wireless terminal, generating a warning based on the received failure information, and the generated warning in the failure information receiving device Is notified to the radio base station monitoring apparatus as a failure processing method for the radio base station.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to detect the failure information of the wireless base station where the failure which cannot connect with a wireless terminal has occurred, and to notify the wireless base station monitoring device of the failure information accurately and immediately. Also, the present invention is different from the conventional method in which a wireless base station determines failure notification from a large amount of statistical information, and determines failure using a wireless terminal actually used by the user. Therefore, it is possible to reliably detect a fault that affects the user service.

The figure which shows the structure of the mobile radio | wireless communications system by one Embodiment. The figure which shows the data format of the failure information managed by the radio | wireless terminal by one Embodiment. The figure which shows the data format of the failure information managed with the failure information receiver by one Embodiment. The figure which shows the process flowchart of the radio | wireless terminal 11 at the time of the failure generation by one Embodiment. The figure which shows the processing sequence of each component apparatus of the mobile radio | wireless communications system at the time of the failure generation by one Embodiment. The figure which shows the process flowchart in the failure information receiver 5 by one Embodiment.

FIG. 1 shows a configuration of a mobile radio communication system according to an embodiment.
This system includes a large number of wireless terminals 11, a plurality of wireless base stations 21 and 22 (generically indicated as 2) that wirelessly communicate with these wireless terminals 11, a plurality of wireless base stations 2, and a maintenance network 31. The wireless base station monitoring device 4 is connected to each other, and the failure information receiving device 5 is connected to the plurality of wireless base stations 2 and the data communication network 32. The radio base station 2 performs voice call and data transmission / reception via the data communication network 32.

  The wireless terminal 11 has functions of a failure detection unit 1101, failure information holding unit 1102, base station search units 1, 103, and failure information notification unit 1104, which are characteristic of the present invention, in addition to known call units and mail units. have. Although the hardware configuration of the wireless terminal 11 is not shown, the wireless terminal 11 has a processor and a memory, and each of the above means is realized by executing an application program by the processor. The wireless terminal 11 that has already been distributed to the user can obtain the application program by downloading it from the network. Further, the wireless terminal 11 has a timer that counts in synchronization with the wireless base station 2, the failure information receiving device 5, and the wireless base station monitoring device 4 by executing the application program.

The failure detection unit 1101 detects a failure that occurs in the wireless base station 2, such as a communication failure caused by a defective program, that prevents the mobile terminal 11 from making a call connection with the wireless base station 21 in the vicinity. The failure information holding unit 1102 has a function of acquiring the failure information and holding it in the memory in the wireless terminal 11 when the failure detection unit 1101 detects a failure occurring in the wireless base station 21. Note that the data format of the failure information stored and managed in the memory will be described later with reference to FIG.
The base station search means 1103 has a function of searching for another radio base station 22 when the radio base station 21 to which the radio terminal 11 has requested connection cannot be connected due to a failure. Whether the failure information notifying unit 13 stores the failure information in the memory of the wireless terminal 11 when the base station searching unit 1103 searches for the wireless base station 22 in which no failure has occurred and is normally connected thereto. This is a function of confirming the failure information and notifying the failure information receiving device 5 of the failure information when the failure information is held.

The failure information receiving apparatus 5 includes a failure information receiving unit 5101, a threshold determination unit 5102, an alarm generation unit 5103, and an alarm notification unit 5104. Although the hardware configuration is not shown, the failure information receiving device 5 is a kind of server device, and includes a processor, a memory, an output means such as an input means and a display. Each of the above means is realized by executing an application program by a processor.
The failure information receiving unit 5101 has a function of receiving failure information transmitted from the wireless terminal 11 and storing it in the memory of the failure information receiving device 5 as a failure event. The threshold value determination unit 5102 is a function for determining a threshold value of a failure event stored in the memory with respect to a threshold value set by a maintenance person. The alarm generation unit 5103 has a function of generating an alarm to be notified to the radio base station monitoring apparatus 4 when the threshold is exceeded by the determination of the threshold determination unit 5102. The alarm notification unit 5104 is a function that notifies the radio base station 4 of the alarm generated by the alarm generation unit 5103.
Although not shown, the failure information receiving device 5 may include a log unit and store the acquired failure information as a log in a storage device for a certain period. The data format of the failure information managed by the failure information receiving device 5 will be described later with reference to FIG.

  The radio base station monitoring device 4 is a kind of server device, and usually monitors the state of the radio base station 2 mainly via the maintenance network 31, and performs fault recovery for the radio base station in which a fault has occurred. Take action. The radio base station monitoring device 4 includes a processor and a memory, and an input unit and an output unit such as a display as hardware configurations (not shown). As a characteristic feature of the present invention, the failure information of the wireless base station 2 detected by the wireless terminal 11 obtained via the data communication network 32 in addition to the monitoring of the wireless base station 2 by the maintenance network 31 is obtained as failure information. Obtained via the receiving device 5. Then, failure information is displayed on the display, and the maintenance person can perform failure recovery processing and maintenance of the radio base station 2 according to an instruction from the input means while viewing the displayed content.

FIG. 2 shows a data format of failure information managed by the wireless terminal 11.
Regarding the format of the failure information, the wireless terminal ID (201) is an ID unique to each wireless terminal (MS) for identifying the wireless terminal 11. The faulty radio base station ID (202) is an ID unique to each radio base station (BS) for identifying the radio base station 2. The radio wave intensity 203 at the time of failure occurrence is the radio wave intensity at the wireless terminal 11 when the wireless terminal 11 detects a failure. The failure detection time 204 is the time when the wireless terminal 11 detects a failure, that is, the time measured by the timer.

FIG. 3 shows a data format of failure information managed by the failure information receiving device 5.
The failure event ID (301) is an ID unique to each failure information received by the failure information receiving device 5, and is given by the failure information receiving device 5. The failure notification time 302 is a time when the failure information receiving device 5 receives each piece of failure information. The wireless terminal ID (303) is an ID unique to each wireless terminal (MS) for identifying the wireless terminal 11, and is equivalent to the wireless terminal ID (301) notified from the wireless terminal 11. The faulty radio base station ID (304) is an ID unique to each radio base station (BS) for identifying the radio base station where the fault has occurred, and the faulty radio base station ID ( 302). The radio wave strength at the time of failure 305 is the radio wave strength at the wireless terminal 11 at the time when the failure occurs, and is equivalent to the radio wave strength at the time of failure 303 notified from the wireless terminal 11. The failure detection time 306 is the time when the wireless terminal 11 detects a failure, and is equivalent to the failure detection time 304 notified from the wireless terminal 11.

FIG. 4 shows a processing flow of the wireless terminal 11 when a failure occurs.
When the wireless terminal 11 searches for wireless radio waves (S401) and receives the radio waves of the wireless base station (BS) 21 (S402), the wireless terminal 11 requests the wireless base station 21 for call connection (S404). At this time, it is determined whether there is a normal response (S404). If a failure occurs in the radio base station 21, the radio base station 21 cannot make a normal response to the radio terminal 11 (No in S404). Therefore, the failure detection unit 1101 of the wireless terminal 11 detects the occurrence of the failure, and the failure information holding unit 1102 acquires the failure information of the wireless base station 21 in which the failure is detected and holds it in the memory of the wireless terminal 11 ( S405). Thereafter, the wireless terminal 11 searches for a wireless base station other than the wireless base station 21 that has detected the failure (S406).

  When receiving the radio wave of the radio base station 22 (S403), the radio terminal 11 requests the radio base station 22 for call connection (S404). When the normal response is notified from the radio base station 22 and the call connection is normally established (S407), the radio terminal 11 determines which of the radio base station failure information (FIG. 2) is stored in the memory. Confirmation is made (S408). As a result of the confirmation, when the failure information of one of the wireless base stations (in this example, the wireless base station 21) is stored in the memory of the wireless terminal 11, the wireless terminal 11 stores the failure information in the data communication network 32. To the failure information receiving device 5 (S409). Thereafter, the wireless terminal 11 starts a normal data transmission / reception process (for example, a call) (S410).

FIG. 5 shows a processing sequence of each component device in the mobile wireless communication system at the time of failure, that is, the wireless terminal 11, the wireless base station 2, the wireless base station monitoring device 4, and the alarm receiving device 5.
When receiving the radio wave from the radio base station 21, the radio terminal 11 notifies the radio base station 21 of a call connection request (S501). At this time, a failure occurs in the wireless base station 21 and it is in an abnormal state, so a normal response cannot be made to the wireless terminal 11 (S502). When the wireless terminal 11 waits for a connection request to the wireless base station 21 and times out, the wireless base station 21 detects a failure and acquires failure information (see FIG. 2), and stores the failure information in a memory in the wireless terminal 11. Hold (S504).

Next, the wireless terminal 11 searches for radio waves other than the wireless base station 21 in which the failure has occurred (S505). When the radio wave of the radio base station 22 is received, a call connection request is sent to the radio base station 22 (S506).
When receiving a normal response to the call connection request from the wireless base station 22 (S507), the wireless terminal 11 transmits the failure information of the wireless base station 21 held in the memory of the wireless terminal 11 to the failure information receiving device 5.

When the failure information receiving device 5 receives the failure information of the wireless base station 21 from the wireless terminal 11, the failure information receiving device 5 stores the failure information in the failure information receiving device 5, further determines whether to generate an alarm based on the threshold, and the determination An alarm is generated according to the result (S509). Then, the generated alarm is notified to the radio base station monitoring device 4 (S510). The alarm includes information such as an alarm name, an alarm ID for identifying the alarm, a radio base station ID at which a fault has occurred, a fault status (that is, the number of fault occurrences, radio wave intensity, and the like). (Fault determination and alarm generation in the fault information receiver 5 will be described later with reference to FIG. 6).
The radio base station monitoring device 4 monitors the radio base station via the maintenance network 31, and manages the operating status, failure status, and maintenance status of all radio base stations based on the information acquired by the monitoring. . When the alarm based on the failure information from the wireless terminal 11 according to the present invention is received, the alarm is displayed on the screen of the display (S511). The maintenance person looks at the display content and recognizes that a failure has occurred in the specific radio base station 21. Then, the maintenance person performs a normal countermeasure for the trouble (S512). For example, the log of the radio base station 21 stored in the storage device of the radio base station monitoring device 4 is examined, and the failure recovery process is performed by performing a software reset for the radio base station.

FIG. 6 shows a processing flow in the failure information receiving apparatus 5.
In the failure information receiving device 5, when the failure information receiving unit 5101 receives the failure information transmitted from the wireless terminal 11 (S601), the failure information is managed in the failure information receiving device 5 based on the failure information (FIG. 2). An event (FIG. 3) is generated (S602), and the failure event data is stored in the memory (S603). For example, when there are a large number of wireless terminals 11 that have detected a failure of the wireless base station 21, a large number of failure event data in which failure information from a plurality of different wireless terminals 11 has been received is sequentially stored in the memory. It will be. When a number of other wireless terminals 11 detect a failure that has occurred in another wireless base station, the failure information is also collected and the failure event data is stored in the memory. In this way, a large number of failure event data is accumulated in the memory.

  The threshold value determination unit 5102 compares the threshold value set in advance by the maintenance person via the input device with the failure event data stored in the memory of the failure information receiving device 5, and the failure event data exceeds the threshold value. It is determined whether or not there is (S604). (Note that examples of the threshold value and the determination will be described later.) If the determination result indicates that the failure event data exceeds the threshold value, the alarm generation unit 5103 generates an alarm (S605), and the alarm notification unit 5104 The generated alarm is notified to the radio base station monitoring device 4 (S606).

  As the determination based on the threshold in the failure information receiving device 5, there is a method of setting a threshold for the radio base station ID (303) where the failure has occurred and the radio wave intensity 305 at the time of failure. For example, the failure occurrence radio wave intensity 305 of a failure event whose failure radio base station ID (304) is a specific radio base station 21 is equal to or higher than a specific radio wave intensity level, and the number of occurrences of a failure that satisfies the criterion is When a predetermined number of times has occurred during a predetermined time, the threshold determination unit 5102 determines that the radio base station 21 of the specific radio base station (BS) ID is in a fault state, and the alarm generation unit 5103 Generate an alarm.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented with various modifications.
For example, in the above-described embodiment, the failure information receiving device 5 is provided independently of the radio base station monitoring device 4, but according to the modification, some or all of the functions of the failure information receiving device 5 are wireless. The base station monitoring device 4 can also be provided. If all the functions of the failure information receiving device 5 are realized by the radio base station monitoring device 4, the failure information receiving device 5 becomes unnecessary.

In the above embodiment, the radio base station monitoring device 4 monitors the radio base station 2 via the maintenance network 31, but if the radio base station 2 is monitored via the data communication network 32, If there is an example, the maintenance network 31 can be omitted.
Further, the names of the radio base station monitoring device 4 and the failure information receiving device 5 are examples, and are not limited to these. For example, the radio base station monitoring device may be referred to as a maintenance device, a maintenance server, a maintenance terminal, or simply a server.

11: Radio terminal 2, 21, 22: Radio base station 31: Maintenance network 32: Data communication network 4: Radio base station monitoring device 5: Fault information receiving device

Claims (8)

Management for managing information related to failure status of a plurality of radio terminals, a plurality of radio base stations connected to the radio terminals and communicating with the plurality of radio base stations via a network In a mobile radio communication system including an apparatus,
The wireless terminal; holding means for storing failure information of the wireless base station in which a failure has occurred; search means for searching for another wireless base station when the wireless base station to which the wireless terminal is trying to connect is abnormal And a transmission means for transmitting the failure information held in the holding means to the management device when connected to a normal radio base station according to the search of the search means,
The management apparatus includes: reception means for receiving failure information of the wireless base station transmitted from the wireless terminal; and alarm generation means for generating an alarm based on the received failure information.
A mobile radio communication system. The management device includes a radio base station monitoring device connected to the plurality of radio base stations via a network, and a failure information receiving device connected to the plurality of radio base stations via a network,
The wireless terminal transmits the failure information to the failure information receiving device using the transmission means,
The failure information receiving apparatus has the receiving means, the alarm generating means, and a notification means for notifying the radio base station monitoring apparatus of an alarm generated by the alarm generating means,
The radio base station monitoring device monitors the status of a plurality of the radio base stations, and displays information on the radio base station in which the fault has occurred indicated by the alarm transmitted from the fault information receiving device on a display unit. The mobile radio communication system according to claim 1. The holding means of the wireless terminal is
A unique wireless terminal ID for identifying each wireless terminal, a unique wireless base station ID for identifying the wireless base station in which the failure has occurred, a radio wave intensity when the wireless terminal detects the failure, and the wireless terminal 3. The mobile radio communication system according to claim 1, wherein information relating to a time when a failure is detected is stored. The failure information receiver is
Fault event ID unique to fault information given to fault information received by the fault information receiving apparatus, fault notification time when the fault information receiving apparatus received the fault information, and radio terminal ID notified from the radio terminal And storing each piece of information regarding the radio base station ID for identifying the radio base station where the fault has occurred, the radio wave intensity at the radio terminal at the time when the fault occurred, and the time when the fault was detected at the radio terminal The mobile radio communication system according to claim 2 or 3, wherein the mobile radio communication system according to claim 2 is managed. Management for managing information related to failure status of a plurality of radio terminals, a plurality of radio base stations connected to the radio terminals and communicating with the plurality of radio base stations via a network A failure processing method in a mobile radio communication system including an apparatus,
In the radio terminal, acquiring fault information of the radio base station in which a fault has occurred and storing it in a storage means;
If the radio base station that the radio terminal is trying to connect to is abnormal, searching for another radio base station;
As a result of the search, when the wireless terminal is connected to a normal wireless base station, transmitting the failure information held in the storage means to the management device via the wireless base station;
In the management device, receiving failure information of the radio base station transmitted from the radio terminal;
Generating a warning based on the received failure information in the management device;
A failure processing method characterized by comprising: A plurality of wireless terminals, a plurality of wireless base stations that wirelessly communicate with the wireless terminals, a wireless base station monitoring device that is connected to the plurality of wireless base stations via a maintenance network, and a communication with the plurality of wireless base stations A failure processing method in a mobile radio communication system including a failure information receiving device connected via a network,
Acquiring fault information of the radio base station where the fault has occurred, and storing the fault information in the storage means of the radio terminal;
If the radio base station to which the radio terminal is connected is abnormal, searching for another radio base station in the radio terminal;
As a result of the search, when the wireless terminal is connected to a normal wireless base station, the failure information stored in the storage means is transmitted from the wireless terminal to the failure information receiving device;
In the fault information receiving device, receiving the fault information of the radio base station transmitted from the radio terminal;
Generating an alarm based on the received failure information;
And a step of notifying the radio base station monitoring device of the generated alarm, and a radio base station failure processing method. The storing step in the wireless terminal includes:
A unique wireless terminal ID for identifying each wireless terminal, a unique wireless base station ID for identifying the wireless base station in which the failure has occurred, a radio wave intensity when the wireless terminal detects the failure, and the wireless terminal The failure processing method according to claim 5 or 6, wherein information relating to a time when a failure is detected is stored in the storage means. In the failure information receiver,
Fault event ID unique to fault information given to fault information received by the fault information receiving apparatus, fault notification time when the fault information receiving apparatus received the fault information, and radio terminal ID notified from the radio terminal And storing each piece of information relating to the radio base station ID for identifying the radio base station in which the fault has occurred, the radio wave intensity at the radio terminal at the time of the fault, and the time at which the fault was detected in the radio terminal in the storage means The failure handling method according to claim 6 or 7, wherein the failure handling method is managed as follows.

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