Portable battery driven telephone which compares estimated battery operation time with transfer time and allows data transfer if the latter exceeds the former

摘要

In a mobile telecommunications system, data is downloaded to a mobile telecommunications handset (MS1) through a PLMN from a WAP server (1) or handset (MS2). Before the download takes place, a check is carried out on the battery of the handset (MS1) to ensure that it has sufficient capacity to support the download. The size of the data file to be downloaded is determined and an estimated time T is computed for the time taken to download the data, which is compared with an estimate tc of the time that the battery can support the data download. If the battery can support the download, it is initiated but otherwise an error message is displayed.