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Most existing simulators for wireless sensor networks (WSNs) model battery-based sensors and provide MAC and routing protocols designed for battery-based WSNs. However, recently, as energy harvesting sensor systems have been studied more extensively, there is an increasing need for appropriate simulators, but few related studies have employed such simulators. Unlike existing simulators, simulators...
This paper investigates the base station (BS) sleeping control and power matching using an extended G/M/1 queueing model with adjustable service rate, considering the general traffic arrival process. Besides the common Poisson arrival traffic model, some bursty traffic models, e.g. the Interrupted Poisson Process (IPP) and the On-Off Process, are also taken into account. The total power consumption...
We propose a wireless Access Point (AP) power saving algorithm, which minimizes the transmission power without decrease the transmission and carrier sense ranges. A wireless AP which is used in our algorithm checks its own original coverage periodically for whether there is a new MN or not when its transmission power is decreased. Moreover, if there is no signaling message to connect the wireless...
The design of an energy efficient IP network is one of the most important challenge that researchers have begun to address in the last decades. A promising resource consolidation technique to improve the energy efficiency of Internet is based on the virtual router migration: when traffic decreases virtual routers are moved and consolidated in fewer nodes of the underlying physical network in order...
Passive Optical Networks (PONs) are assumed to be green access technology; however, there is still big room to maximize its energy saving. Therefore, there are significant research efforts in industries and academia. To evaluate and compare different types of energy efficiency solutions in PON, mathematical models are already studied energy efficiency. However, mathematical models are complex and...
The concept and the techniques that consist the Internet of Things (IoT) has been widely studied over the last decade. The IoT architecture includes a number of different physical objects with different communication techniques (e.g., WiFi, Bluetooth, IEEE 802.15.4), which allow these things to connect themselves to the Internet. Along with the physical connectivity, a number of different IETF standards...
IETF CoRE working group proposed to use DTLS for supporting secure IoT services. In this paper, we examine problems that can happen when applying the DTLS protocol to IoT networks directly. To solve the problems, we separate the DTLS protocol into two; the handshake phase and the encryption phase. Our approach enhances performance in both device and network by using a way to delegate the DTLS handshake...
In the packet access of wireless sensor network, the access protocol for avoiding packet collision causes the delay. Therefore, the real time data collection is difficult. In the wireless communication for simultaneous data collection (WC-SDC), the sensed data is projected to the parameters of the wireless communication. The specific feature of sensed data appears in the received signals. Therefore,...
Wireless Sensor Networks (WSNs) typically aggregate sensed events into a sink by Continuous Monitoring (CM) or Event-Detection (ED). Cluster heads receiving and sending aggregated data have a difficulty in maintaining traditional cluster-based WSNs due to the energy hole problem, which leads to faster energy depletion around the sink. This paper shows how reporting frequency to the sink can be controlled...
Web of Object (WoO) based Home Energy Efficiency Management System (WHEEMS) synchronizes and creates knowledge on energy efficiency management through multiple types of objects VO and CVO. They will facilitate a composition and collaboration of smart distributed applications which combines information from different domains in the IoT infrastructure. WHEEMS focuses to support residents' comfort as...
The proposed transmitter structure for human body communications improves the data rate with a simple modification of the conventional frequency selective digital transmitter. A maximum data rate is increased by 75 percent, from 1.3125 Mbps to 2.2969 Mbps while the transmitted signals are satisfied with the transmit spectral mask. By the proposed detection scheme, the receiver does not require additional...
The world is experiencing an unprecedented explosion in the number of smart devices and mobile apps available. In particular in health area devices and technologies related to market place are often restricted to proprietary platforms, typically working in isolation with fixed hardware settings. Gaining access to high-quality data — including aggregated data from existing sensors, gadgets and smart...
Recently, Wireless Body Area Network (WBAN) has promise to revolutionize human daily life, which is built to serve a variety of healthcare and entertainment applications for human beings. The need for multiple sensors and constant monitoring lead these systems to be energy hungry and expensive with short operating lifetimes. In this paper, we study the popular power management technique Dynamic Voltage...
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