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Heterogeneous wireless access networks will be deployed in many areas. IEEE802.11g and IEEE802.16e will become key technologies as means of providing wireless broadband access to mobile users. These two different wireless access technologies will co-exist while complementing each other in the near future; hence, a mobile node (MN) with dual interfaces will likely execute many handovers (HOs) between...
Switching a communication path from one access point (AP) to another in inter-domain WLANs is a critical challenge for delay-sensitive applications such as voice over IP (VoIP) because communication quality during handoff (HO) is more likely to be deteriorated. To maintain VoIP quality during HO, we need to solve many problems. In particular, in bi-directional communication such as VoIP, an AP becomes...
In the near future, mobile nodes (MNs) need to automatically select an optimal interface based on communication quality in a multimodal environment, that is, multimodal communication. While the existing handover management schemes avoid the communication termination, they can not satisfy (1) seamless communication and (2) selection of an optimal wireless network based on communication quality, and...
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