Data processing: database and file management or data structures – Database design – Data structure types
Patent
1997-04-01
1998-11-03
Black, Thomas G.
Data processing: database and file management or data structures
Database design
Data structure types
707202, 707203, 707 10, G06F 1730
Patent
active
058325247
DESCRIPTION:
BRIEF SUMMARY
This application is a national phase of international application PCT/ F195 / 00417 filed Aug.7,1995 which designated the U.S.
The present invention relates to a method for transfer of files produced by a communication device from a mass storage of the communication device to a memory of a post-processing system for the data contents of said files.
Digital switching exchanges and similar communication devices produce and are fed with a lot of various kinds of data which are to be stored for later processing. Such data include, for example, new or changed subscriber information, charging data of calls, various kinds of alarms, etc. The post-processing procedures include, for example, system maintenance, error analysis, charging subscribers, making statistics, etc.
Usually, communication devices comprise mass storages of their own, for example, a hard disk onto which they store the required data into files. Individual communication devices do not usually perform by themselves the post-processing of the data gathered, but it is done in a centralized manner by a separate post-processing system, such as an operation and maintenance center, to which, through an operation and maintenance network, the data are gathered and stored by means of a file transfer, access and management service.
In this case, a problem occurs concerning the free storage capacity of the mass storage of the communication device, because without deleting previous data that has already been sent forward, the memory will very soon become full. Prior art methods and protocols have required measures on the part of the operator, or include complicated verification routines straining system internal signaling channels.
It is the purpose of this invention to create a simple and reliable way for transfer of files from a communication device to a post-processing system. In order to achieve this, the method of the invention is characterized by information on the state of the files in each mass storage of a communication device, and/or a time stamp of the latest writing operation into it; to another control file which is in the memory of the post-processing system and which is updated in each transfer; device that have been modified on the basis of the comparison of control files since the latest updating of a control file of the post-processing system; with information on the files that have been transferred, and copying said information to a communication device for indicating the capacity made available in the mass storage of the communication device.
Other preferred embodiments of the invention are characterized by what is set forth in the attached claims.
In the following, the invention will be described in closer detail with reference to the accompanying drawings in which FIG. 1 shows a general overview of a communication network in which the invention can be applied, FIG. 2 shows the method of the invention in practice as the files are being read and written into.
As an example of a communication device, the Nokia Telecommunications DX 200 switching exchange and connection from it to a post-processing system is hereby used. It is possible to connect the DX 200 exchanges, marked DX1 -DX4 in FIG. 1, to a DX 200 operations and maintenance network. By means of the operations and maintenance network, the operation of the exchanges and the gathering of data they produce can be centralized in a desired Operations and Maintenance Center, OMC. From the exchanges DX1 -DX4 or from the OMC (OMCA, OMCB in the figure), it is Possible to arrange a communication link to, for example, a post-processing system of a packet network terminal X.25, marked OS (Operation System) in the figure. The data link is able to transfer files by a standard protocol, for example, by a FTAM (File Transfer Access and Management, ISO IS8571) protocol.
From any point into which a data link has been installed in the operations and maintenance network, data gathered in the point can be sent to a post-processing system by a FTAM protocol. Thus, the post-processing system serves as a co
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Alam Hosain T.
Black Thomas G.
Nokia Telecommunications Oy
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