Fortschrittliches Teilnehmerausfallbenachrichtigungssystem und zugehörige Verfahren

摘要

An advanced subscriber outage notification method 100 notifies the user of a subscriber unit 30 that its call is going to be dropped due, for example, to reduced system capacity following frequency replanning in a satellite communications system. The subscriber unit, satellite 20 or mobile telecommunication system 10 first predicts whether an outage is going to occur and how much time there is before the outage. The subscriber unit then notifies the user of the outage and the time remaining, following which, the subscriber unit waits to see whether the user wants to end the call. If the user decides to end the call, the subscriber unit, satellite, or mobile telecommunication system terminates the call, otherwise the mobile telecommunication system drops the call once the remaining time expires. Outage may be predicted by determining that no cells are available to handoff to, or by determining that the intended handoff cell is dead or overloaded.