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Efficient vertical handover mechanisms are required to provide service continuity over available and upcoming heterogeneous wireless access networks. They should provide low delays and good accuracy to meet service requirements. In the literature, proposed mechanisms rely on a rich knowledge of users' ambient environments and contexts. The outcomes are complex mechanisms that require significant amount...
TCP, the facto standard used in today's Internet, has been found to perform poorly in Mobile Ad Hoc Networks (MANETs). This is exacerbated by contention with increasing UDP-based high priority multimedia traffic and the class differentiation introduced in current QoS protocols, which results into TCP starvation and increased spurious timeouts. In this paper, we propose a cross-layer TCP enhancement...
In this paper, size based adaptive backoff algorithm (SBA backoff algorithm) for IEEE 802.11 DCF has been developed to provide quality of service (QoS) requirements. SBA backoff algorithm assigns different priority levels based on packet size. Also, SBA backoff algorithm was utilized in the mobile ad-hoc network (MANET), which is a collection of mobile independent nodes. Because of dynamic topology,...
The following topics were dealt with: wireless sensor networks; MANET; WLAN; IEEE 802.11; MIMO; OFDMA; scheduling; mobility and resource management; Internet; localization; WiMax; coding; OFDM; media streaming; QoS; security; WiMob; cryptographic protocols; ad hoc networks security; broadband wireless access; wireless and mobile computing.
The idea of mobile computing service is to provide a ubiquitous information environment. However, the present mobile ad hoc networks still can't support real-time transmission very effectively. In other words, the capability of supporting QoS guarantee has become a very important issue. IEEE 802.11 PCF adopts the polling scheme to provide time-bounded traffic services, which is not suitable in multihop...
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