| Summary: | 碩士 === 國立中興大學 === 資訊科學與工程學系 === 96 === As the network technology grows vigorously, more and more network interfaces are equipped with the portable devices. Surfing the Internet with the portable devices is already a part of modern''s life. However, while the users moved, the numerous networks interfaces must have the question of transmission range. The portable devices'' advantages bring up their shortcomings at the same time - Battery Lifetime, influence the users'' using time directly. So, how to achieve handoff without breaking transmission down and lengthen battery lifetime over heterogeneous networks are worth questions to think. In this thesis, we not only proposed an End-to-End mobility management scheme that enables users to handoff over heterogeneous networks but also had a CoolSpots power management scheme that helps users to save power with network devices, reach more efficiency.
Via the experiments, handoff decision that we used can detect different network conditions and determine a vertical handoff or not. Handoff manager can support UDP handoff. And power saving decision can decide states with handoff manager. Power manager can reach power saving according to PSM of each network devices. We not only achieve handoff over heterogeneous networks but also save electric consumption of wireless devices up to 71%.
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