Abstract
In a wireless ATM system, a network must provide seamless services to mobile users. To support this, mobility function should be added to existing ATM networks. Through a handoff operation, a mobile user can receive a service from the network without disconnecting the communication. A handoff results in connection path rerouting during an active connection. To avoid cell loss during a handoff, cell buffering and rerouting are required in the network. A handoff switch is a connection breakdown point on an original connection path in the network from which a new connection sub‐path is established. It performs cell buffering and rerouting during a handoff. Cell buffering and rerouting can introduce a cell out‐of‐sequence problem. In this paper we propose a handoff switch architecture with a shared memory. The architecture performs cell buffering and rerouting efficiently by managing logical queues of virtual connections in the shared memory and sorting head‐of‐line cells for transmission, thus achieving in‐sequence cell delivery during a handoff. We also present simulation results to understand the impacts of handoffs on switch performance.
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Kim, H., Chao, H.J. Design of an ATM switch for handoff support. Wireless Networks 6, 411–419 (2000). https://doi.org/10.1023/A:1019239225687
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DOI: https://doi.org/10.1023/A:1019239225687