By introducing an hybrid access scheme for a star network that merges centralized and distributed features, a new approach for polling WLANs is presented. The main idea is the use of a double path where the delivery is first attempted through a direct link with a single-hop, typical of distributed LANs. When this procedure fails, the delivery is completed by means of the more reliable star hub, building a dual-hop strategy. The hub manages the token passing and allows the packets delivery to other LANs. A traffic model, to characterize the intraLAN and interLAN packets flow, and an ARQ strategy, to assure the correct information delivery and to detect the unavailability of the direct path, through a given retries threshold, are introduced. Performance of the proposed system are analytically evaluated to obtain fast optimization tools and are verified by means of simulations.
Single-Hop and Dual-Hop Routing Strategies for Polling WLAN Systems
GIOVANARDI, Alessandra;MAZZINI, Gianluca
1998
Abstract
By introducing an hybrid access scheme for a star network that merges centralized and distributed features, a new approach for polling WLANs is presented. The main idea is the use of a double path where the delivery is first attempted through a direct link with a single-hop, typical of distributed LANs. When this procedure fails, the delivery is completed by means of the more reliable star hub, building a dual-hop strategy. The hub manages the token passing and allows the packets delivery to other LANs. A traffic model, to characterize the intraLAN and interLAN packets flow, and an ARQ strategy, to assure the correct information delivery and to detect the unavailability of the direct path, through a given retries threshold, are introduced. Performance of the proposed system are analytically evaluated to obtain fast optimization tools and are verified by means of simulations.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
