Showing papers on "Handover published in 1987"
Patent•
9 Sep 1987
TL;DR: In this paper, a serial data exchange between more than two subscribers (T1... Tn) of each subscriber has only a single central processing unit (CPU) with only one se-material interface (T × D, R × D) for the data exchange and is two couplers with two independent data buses Connected.
Abstract: In a device for serial data exchange between more than two subscribers (T1 ... Tn) of each subscriber has only a single central processing unit (CPU) with only one se-material interface (T × D, R × D) for the data exchange and is two couplers with two independent data buses Connected. Each of the two couplers is independently of the other from the computer (CPU) to receive and / or transmitting switchable. The computer (CPU) is an electronic funds monitoring device (Watchdog) associated with the continuously monitored him, to the effect that the occurrence of malfunctions or faults, the signal lines (DE1-DE1 or DE2-DE2) for "Enable Send" to the two couplers and thus a handover from being blocked by data. In order for a defective participant is to take effect from the traffic and the data traffic among the other, properly functioning subscribers via the two data buses still possible.
2 citations
1 Jun 1987
TL;DR: An access scheme for a satellite-based aeronautical mobile communication system to be used in the mid to late 1990s in continental United States (CONUS) is proposed and log-in procedures and handover strategies will be described.
Abstract: The Aeronautical Mobile Satellite System consists of a number of control stations spanning the United States and a ground communications network that interconnects the stations. Each station is responsible for the air mobile within its designated airspace. To effect such control, each station must be able to communicate with the air mobile in its airspace. Since a typical flight will traverse areas served by several stations, it is necessary to develop a scheme whereby communications will be maintained for the duration of the flight. We propose an access scheme for a satellite-based aeronautical mobile communication system to be used in the mid to late 1990s in continental United States (CONUS). Log-in procedures and handover strategies will be described.
1 citations