This paper presents handover procedures for the Broadband Cellular ATM Access (C-ATM) system which shall provide wireless ATM access for mobile users. Beside the description of the architecture and protocol stack of the system this paper describes message sequence charts for two different handover types: radio and network handover. This differentiation allows most of the handovers to be performed seamlessly, i.e., without loss of ATM cells. This feature is especially important for real time applications such as video.
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