Today’s wireless networks are highly heterogeneous, with mobile devices consisting of multiple wireless network interfaces (WNICs). Since battery lifetime is limited, power management of the interfaces has become essential. We develop an integrated approach for the management of power and performance of mobile devices in heterogeneous wireless environments. Our policy decides which WNIC to empl...

By its nature, the satellite sector is the most “pan-European” of all communications infrastructures and services. Unlike any terrestrial network, satellite networks can provide coverage to all parts of Europe. This strength of satellite networks, nonetheless, creates a great regulatory challenge. Due to wide satellite coverage, operators depend on harmonized spectrum allocations. The services ...

Numerous studies have shown that packet reordering is common, especially in satellite networks where there are regular handoffs occurring between neighboring satellites. Reordering of packets decreases the TCP performance of a network, mainly because it leads to overestimation of the congestion of the network. We consider satellite networks and analyze the performance of such networks when reor...

Network reliability analyses have received much attention in heterogeneous wireless network performance evaluation during the last few years. In this paper, a method for heterogeneous wireless network reliability evaluation to meet the required levels of heterogeneous wireless network differences of various graph-theoretic connectivity measures is proposed. A concept of heterogeneous wireless n...

The Gigabit Satellite Network, a project jointly sponsored by ARPA and NASA, will provide longhaul STS-3 (155.54 Mb/s) and STS-12 (622.08 Mb/s) pointto-point and point-to-multipoint full-duplex services over NASA's Advanced Communications Technology Satellite (ACTS). Data multiplexing over the satellite will be accomplished using TDMA techniques coordinated with the switching and beam hopping f...