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In heterogeneous wireless networks, when a mobile host/handset (MH) with multiple wireless interfaces changes its location or requires a certain network service, the MH will require a switch between different wireless networks (namely vertical handoff). A congestion-aware proactive vertical handoff algorithm is proposed, which uses a data pre-deployment technology to realise soft handoff between cellular...
In this paper, we investigate problems related to optical wavelength division multiplexing (WDM) networks that use the virtual concatenation (VCAT) mechanism of synchronous optical network (SONET) technology. VCAT, an end-to-end mechanism, allows SONET based optical WDM networks to carry traffic in finer granularity via multiple paths or a single path with multiple wavelengths. The benefits include...
Integrated cellular networks (ICNs) are normally constructed by adding ad hoc overlay on cellular networks to solve the latter's flexibility and capacity expansion problems. In such networks, routing plays a critical role in finding a route to divert congested traffic from a congested cell to another less crowded cell. Much work has been conducted on routing protocols in ICNs, whereas no dedicated...
This paper proposes an adaptive routing protocol called ARFA for an integrated cellular and ad hoc heterogeneous network with flexible access (iCAR-FA). An iCAR-FA system offers a flexible traffic diversion mechanism that allows a mobile host to utilize the bandwidth in another cell, as such easing the congestion problem and increasing the throughput in a cellular network. Based on the presentation...
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