Wireless networks have been widely deployed in recent years to provide high-speed Internet access to mobile users. In traditional IEEE 802.11 wireless LANs, all users directly connect to an Access Point (AP) and all packets are forwarded by the AP. As a result, the coverage and capacity of the network is limited. If ad hoc mode is adopted in both the AP and mobile nodes, the one hop connections from AP can be extended to multiple hops. Such architecture, termed WIANI (Wireless Infrastructure and Ad-Hoc Network Integration) in this paper, is able to extend the network coverage beyond the coverage of APs.
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