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Broadcast plays an important role and is widely used in Wireless Sensor Networks (WSNs). Several problems of the broadcast have been intensively addressed in the literature, such as minimizing energy consumption and minimizing broadcast latency. The existing broadcast schedules show that there is a trade off between the energy consumption and the broadcast latency. Finding a broadcast schedule minimizing...
Smart home and Internet of Things (IoT) are recently drawing attention as the next-generation concept for home appliances. Inexpensive wireless communications technologies for connecting appliances to have enhanced capability and service will be important. This paper proposes the Inaudible Dual Tone Data transmission (IDTD) method, which can be applicable to them based on built-in speakers and microphones...
In Proxy Mobile IPv6, network entities such as mobile access gateway and local mobility anchor perform mobility on behalf of the mobile nodes. Thus, PMIPv6 decreases the handover latency and the network enables mobile nodes to receive mobility support although they do not have mobility protocol stack within them. However, when a large number of mobile nodes are attached to the PMIPv6 domain, or they...
Greedy forwarding is the main component of geographic routing in wireless sensor networks (WSNs). As it uses 1-hop local information for packet forwarding, it does not need to maintain routing table, having low overhead and high scalability. Early proposed greedy forwarding schemes do not consider link quality, so the schemes experience performance degradation from unreliability of links in real environment...
Many schemes to reduce the inter-MAP handoff delay in hierarchical mobile IPv6 have been proposed but the previous schemes waste relatively large network resources to decrease the path rerouting delay. In this paper, we propose the 2-layered MAP concept, where the seamless inter-MAP handoff can be supported regardless of path rerouting time. As a result, the waste of wired resources and the rate of...
With the growth of the mobile communication technology and the establishment of broadband networks, a transport layer protocol that is suitable for these circumstances is required. Although TCP, developed in wired environments, is a generally used transport layer protocol, it is not appropriate for wireless environments that are error-prone and have high delays. Moreover, previous wired and wireless...
The IEEE 802.16e system is a specification that supports the IEEE 802.16, fixed broadband wireless access (BWA) system with mobility management scheme. Along with this standard, there are many researches on how to transmit the high rate of data seamlessly during the MNpsilas fast movement. With the IEEE 802.16e standard, to resume the active session of IP connectivity, the Internet engineering task...
Modern wireless networks require wide bandwidth and high-speed mobility, and IEEE 802.16e is considered to be a technology capable of meeting such requirements. One of the most important issues with IEEE 802.16e is for the handover technology to provide seamless high capacity data services at a high speed rate. Data transmission to the terminal device is interrupted while scanning is performed for...
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