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The conventional positioning systems require the users to carry an electronic device, which helps in the localization process. Device-free Passive Localization (DfPL) techniques are used to position the users in a passive manner such that they do not engage in the process. A typical DfPL setup comprises of Wi-Fi Access Points (APs) that transmit periodic signals to Monitoring Points (MPs). Any intrusion...
Device-free Passive Localization (DfPL) is concerned with positioning objects that do not carry an active electronic device, and hence do not participate in the positioning process. A typical DfPL setup employs a set of Access Points (APs) and Monitoring Points (MPs) in order to passively trace objects. In this paper, we examine DfPL using 1 AP and 2 MPs to better understand its performance in typical...
A network-assisted mobility management scheme has been proposed in this work for a Software-Defined Network (SDN). Instead of using just one controller as is the case in the legacy SDN, this work explores a distributed architecture with multiple sub-controllers. Detailed procedures for intra-domain and inter-domain handovers under this setting have been introduced and explained.
In this paper we propose a low cost and computationally inexpensive adaptive transmission power control algorithm for wireless sensors to communicate with the base station or hub. This power control algorithm can be used in scenarios where the transmitting station is not static and the distance between the transmitter and the receiving station changes with time. In addition to that there can be unwanted...
This paper proposes a modified communication protocol that uses the knowledge of channel states to transmit packets. It shuts off the energy expensive acknowledgement operation during good channel state while uses all its retransmission attempts in bad channel state to deliver the packets through the channel. The impact of this protocol has been directly studied on the coin cell batteries that are...
The ubiquitous nature of miniature wireless sensors and rapid developments in the wireless network technology have revolutionized home monitoring and surveillance systems. The new means and methods of collecting data efficiently and have led to novel applications for indoor wireless sensor networks. The applications are not limited to solely monitoring but can be extended to behavioral recognition...
Wireless sensors are constrained by a limited supply of energy when powered by batteries. They also have limited memory and limited computational power. The challenge of a network based on such constrained infrastructure is twofold; maintaining data reliability and energy efficiency. Availability of the instantaneous channel side or state information (CSI) at the transmitter can help it to set transmission...
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