Patent ID: 8595713

Claim:
A radio base station for transmitting and receiving radio signals in a mobile radio network, the radio base station having an interface with a remote operation and maintenance node, the radio base station comprising: a radio interface that provides mobile communications to end user mobile electronic devices; a non-volatile memory comprising a file system in which files relating to operation of the radio base station are stored; wherein the file system comprises at least two versions of an operational file, out of which one version is an active version used in the operation of the radio base station and received from the remote operation and maintenance node as an upgrade version of the operational file and out of which one version is a previous version; the radio base station comprises an indication as to which of said at least two versions is the active version; the radio base station operates using the upgrade version of the operational file as the active version of the operational file; the radio base station (i) determines that its operation using the upgrade version of the operational file is running smoothly and (ii) detects that the radio base station is not able to contact the remote operation and maintenance node; the radio base station reverts to using the previous version of the operational file in the operation of the radio base station instead of the upgrade version of the operational file after (i) determining that the operation of the radio base station using a new version of the file-to-be-upgraded is running smoothly and (ii) detecting that the radio base station is not able to contact the remote operation and maintenance node; the radio base station further comprises a content indicator for a file stored in the file system, the content indicator indicating whether or not the file associated with the content indicator is faulty; a boot application is arranged to check said content indicator upon start up of the radio base station; and the boot application is further arranged to load contents of a backup area into the file system if the content indicator indicates that the file is faulty.