JP3306354B2 - Mobile station and mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station and a mobile communication system, and more particularly, to a mobile station for transmitting communication history information used for elucidating a cause when a failure occurs in a base station to a center device. And a mobile communication system including the mobile station.

[0002]

2. Description of the Related Art In a conventional mobile communication system, a user operates a PHS (Personal Handyphone).
System) and other mobile terminals that are mobile terminals,
If an unexpected operation or data transmission / reception is performed at the development stage, the base station may hang or a system reset may occur due to a software bug of the base station. In addition, the base station saves the communication history that records the communication status with the mobile station in the memory area of the base station in order to determine the process in which such a failure occurred, and the base station performs a system reset and performs normal operation. After that, the communication history is analyzed.

[0003]

However, according to this conventional method, depending on the type of software bug of the base station, a system reset may occur before performing the process of writing the communication history in the memory area of the base station, Alternatively, a situation often occurs in which the memory area to which the data has been written is destroyed and analysis after the occurrence of the failure becomes impossible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a mobile station and a mobile communication system capable of performing analysis after a failure even if information left in a base station is incomplete. The purpose is to provide a system.

[0005]

According to the first aspect of the present invention, there is provided a mobile communication system for achieving the above object.
A mobile communication system including at least a base station, a mobile station, and a center device that monitors them, wherein the mobile station stores communication history information with the base station, and communicates with the base station. Determining means for determining whether or not abnormal termination has occurred due to the cause of the base station, and transmitting the communication history information to the center device when the determining means has determined that abnormal termination has occurred due to the cause of the base station. Transmitting means for transmitting the identification information of the base station itself and initialization information indicating that the base station itself has been initialized to the center device. Features.

A mobile communication system according to a second aspect of the present invention is the mobile communication system according to the second aspect,
The center device may further include identification information of the abnormally terminated base station included in the communication history information transmitted by the transmitting unit and a second
The base station is associated with the communication history information based on the identification information transmitted by the transmitting means.

A mobile station according to a third aspect of the present invention is a mobile station used in the mobile communication system according to the first aspect, wherein storage means for storing communication history information with a base station,
Determining means for determining whether communication with the base station has been abnormally terminated due to the cause of the base station; and transmitting means for transmitting the communication history information to a center device that monitors the base station and the mobile station. The transmitting unit transmits the communication history information to the center device when the determining unit determines that the communication has ended abnormally due to the cause of the base station. The mobile station according to the fourth aspect of the present invention provides the mobile station according to the second aspect.
A mobile station used in the mobile communication system according to the above, storage means for storing communication history information with the base station, whether or not the communication with the base station abnormally terminated due to the base station side And a transmitting unit for transmitting the communication history information to a center device that monitors a base station and a mobile station, wherein the transmitting unit determines that the determining unit abnormally ends due to a cause on the base station side. Transmitting the communication history information to the center device when it is determined that the communication history information has been transmitted.

[0008]

Embodiments of the present invention will be described in detail with reference to the drawings, taking a PHS system as a mobile communication system as an example. FIG. 1 is a block diagram showing a configuration of a PHS system according to the present invention. 100 to 103 are
It is a PHS terminal as a mobile station, and performs bidirectional communication with a PHS base station, which will be described later, via a wireless line. A control unit (not shown) is provided inside the mobile station.
It is composed of a microprocessor, ROM, RAM and the like for controlling the whole terminal, and controls various input / output devices, performs memory management, data processing, and the like. Further, the control unit stores communication history information with the base station in the RAM.

[0010] Reference numerals 110 to 112 denote PHS base stations, which are connected to exchanges (not shown) via a public network 120. Reference numeral 130 denotes a center device, which not only controls the switching operation of the exchange but also stores the location information of the mobile station and stores the communication history information with the PHS base station transmitted from the mobile station.

Next, regarding the operation of the mobile station and the mobile communication system according to the present invention configured as described above, the mobile station 100 performs communication within the area of the PHS base station 110 (communication in this case is voice communication). / Regardless of data communication)
Will be described in detail by taking as an example the case of performing First, mobile station 1
00, when a link channel is established using the PHS base station 110 and then a communication channel is connected to communicate with a specific user, a base station failure occurs in the communication history memory secured in the mobile station 100. Useful information is stored as failure analysis data at any time.

FIG. 2 is a conceptual diagram showing an example of storing failure analysis data in a communication history memory. As shown in FIG. 2, the stored data includes the communication start date and time, the PHS base station ID used, the telephone number of the communication partner, the contents of the link channel establishment phase (link channel establishment request, link channel assignment, etc.), the contents of the service channel establishment phase. (Call setting, call setting acceptance, authentication request, authentication response, etc.).
If a control sequence such as TCH switching or handover occurs during communication, the information is also recorded in the communication history memory as needed. Further, when an additional service such as a wireless facsimile, a wireless modem, or a short message notification is activated from the mobile station 100, information on the service information is recorded in the communication history memory as needed.

FIG. 3 is a flowchart showing the operation of the mobile station when a communication error occurs. While the mobile station 100 records the communication history inside the mobile station 100 as described above,
While the channel with the PHS base station 110 is being continued, due to an unexpected operation from the mobile station 100 or transmission / reception of data, the PHS base station 110 When a software error (for example, a bus error, an address error, or division by zero) occurs and a system reset is suddenly generated without operating a normal communication termination sequence with the mobile station, the operation on the mobile station side is performed. Will be described with reference to FIG.

As described above, the mobile station 100 sequentially accumulates various information from the start of communication in the communication history memory inside the mobile station (S300). Next, when the communication ends, it is determined whether the communication ends normally or abnormally (S310). When the PHS base station resets the system for the above-described reason, the communication channel that has established the link is suddenly disconnected, and the communication ends abnormally.

When the mobile station 100 detects an abnormal end of communication, the mobile station returns to the normal state with the PHS base station 110 used immediately before and re-establishes the link channel, or The user moves from one location to another PH
The link channel is re-established with the S base station (for example, the PHS base station 111) and it is monitored whether or not there is a free communication channel (S320). When communication becomes possible, the center device 1 of the PHS system is transmitted from the mobile station via the PHS base station and the public network 120 without user assistance.
A call is automatically made to 30 and the communication history at the time of abnormal termination stored in the communication history memory is transmitted (S330).
If the communication here does not end normally, the communication history is added to the communication history memory (S340), and the mobile station waits again until the mobile station shifts to a communicable state (S320).
On the other hand, if the communication has been normally completed, the communication history stored in the communication history memory is cleared (S350), and the process shifts to a transmission / reception standby state (S360).

FIG. 4 shows a PHS when a system reset occurs.
5 is a flowchart illustrating an operation on the base station side. After the occurrence of the system reset, the PHS base station 110 performs boot processing of various programs (S400), establishes synchronization on the line side (S410), and establishes synchronization with other peripheral PHS base stations (S420). When synchronization is established in S420, P
The HS base station is again in an active state capable of communication,
Information that the PHS base station has become active is transmitted to the center device 130 (S430), and the communication service of the PHS base station is started. Further, the active information of the PHS base station includes the ID of the PHS base station (PHS base station ID) and the date and time when the PHS base station has shifted to the active state.

When the center device 130 receives from the mobile station a communication history at the time of abnormal termination of communication and an active state notification from the PHS base station after the system reset, the center device 130 converts the data into a database and notifies the active state notification. PHS that caused more system reset
Obtain the PHS base station ID and occurrence time of the base station. Further, the communication history from the mobile station having the PHS base station ID is searched from the database, and the contents of the communication operation between the mobile station and the PHS base station at the time of the system reset are examined to clarify the cause of the failure. analyse. When a large number of communication histories of the corresponding PHS base station ID have been transmitted to the center, the communication histories can be narrowed down based on the occurrence time included in the active state notification.

[0017]

As described above, according to the mobile station and the mobile communication system according to the present invention, the analysis of the base station failure is performed not only from the information inside the base station but also from the information stored in the mobile station. Can also be analyzed. Furthermore, even if failure information such as communication history is lost due to a failure due to a software error or the like inside the base station, the information can be supplemented by the communication history on the mobile station side. It is possible to easily ascertain the cause of failure with certainty, and contribute to the reduction of bugs in a mobile communication system with increasingly diversified services.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a PHS system according to the present invention.

FIG. 2 is a conceptual diagram showing an example of storing failure analysis data in a communication history memory.

FIG. 3 is a flowchart showing an operation of the mobile station when a communication error occurs.

FIG. 4 is a flowchart showing the operation of the PHS base station when a system reset occurs.

[Explanation of symbols]

 100 to 103 PHS terminal 110 to 112 PHS base station 120 Public network 130 Center device

Claims (4)

(57) [Claims] 1. A mobile communication system comprising at least a base station, a mobile station, and a center device for monitoring them, wherein the mobile station stores communication history information with the base station; Determining means for determining whether communication with the base station has been abnormally terminated due to the cause of the base station; and determining that the determining means has abnormally ended due to the cause of the base station.
Transmission means for transmitting the communication history information to the center device when the connection is interrupted , wherein the base station has the identification information of the base station itself and the base station itself.
And initialization information indicating that initialization has been performed.
A mobile communication system , comprising: a second transmission unit for transmitting to a mobile communication system. 2. The mobile communication system according to claim 1, wherein the center device includes identification information of an abnormally terminated base station included in the communication history information transmitted by a transmission unit, and a second terminal.
A base station and communication history information are associated with each other by the identification information transmitted by the transmitting unit. 3. The mobile communication system according to claim 1,
A mobile station used for, storage means for storing communication history information with the base station, a determination means for determining whether the communication with the base station has been abnormally terminated due to the cause of the base station side, Transmitting means for transmitting the communication history information to a center device monitoring a base station and a mobile station, the transmitting means, when the determining means determines that abnormal termination due to the cause of the base station side, Transmitting communication history information to the center device. 4. The mobile communication system according to claim 2,
A mobile station used for, storage means for storing communication history information with the base station, a determination means for determining whether the communication with the base station has been abnormally terminated due to the cause of the base station side, Transmitting means for transmitting the communication history information to a center device monitoring a base station and a mobile station, the transmitting means, when the determining means determines that abnormal termination due to the cause of the base station side, Transmitting communication history information to the center device.