Recent studies have shown that it is possible to implement the Internet Protocol (IP), especially IPv6, in low-power IEEE 802.15.4 based wireless sensor networks (WSN). Blip is an open source experimental implementation of IPv6 over Low-power Wireless Personal Area Networks (6LoWPAN) based on TinyOS. In this study, the performance of Blip 2.0’s Transmission Control Protocol (TCP) under IEEE 802.11g…
Tags: OMNeT++ AODV
Panel discussions computing technology for autonomous driving
Autonomous driving is becoming more and more multidisciplinary. Not only vehicular technologies but also computing, networking, and data management technologies are involved in autonomous driving. Of particular interest includes the trade-off between in-vehicle computing and cloud computing to support artificial intelligence of autonomous driving. Perception and planning of autonomy requires high-performance computing while battery-driven vehicles must…
Inductive coupling effects in large TSV arrays
The effects of inductive coupling among TSVs within large TSV arrays are investigated in this paper. A comparison of the equivalent inductance of a paired TSV model and arrayed TSV macromodel is presented for three TSV distribution topologies, grouped, lined, and uniform, within the power network. Modified closed-form expressions are proposed to determine the equivalent inductance…
Accurate and Efficient Algorithms for Cognitive Radio Modeling Applications Under the i.n.i.d. Paradigm
Given that the statistical analysis of the frequency band of interest are available, it has been shown that adaptive searching for white spaces could improve by 70% when compared with random searching. In this paper, we characterize and provide a statistical estimation of the number of channels available for opportunistic usage by secondary users (SUs)…
Six-port technology for MIMO and cognitive radio receiver applications
Six-port technique is a very accurate and cost effective method to determine the amplitude and phase of any input signal with respect to a known signal using only power or voltage measurements. This property of six-port technique has been variously exploited in a number of RF (radio frequency) and microwave applications. The present paper provides a…
Sum Rate Improvement in Cognitive Radio through Interference Alignment
In this paper we propose an interference alignment (IA) scheme in which the performance of the secondary users (SUs) transmitting their information on the same frequency band of the pre-existing primary links is improved in terms of achievable sum rate without generating any interference on the primary network. In our scenario, in which the primary…
Comments on “Optimal utilization of a cognitive shared channel with a rechargeable primary source node”
In a recent paper [1], the authors investigated the maximum stable throughput region of a network composed of a rechargeable primary user and a secondary user plugged to a reliable power supply. The authors studied the cases of an infinite and a finite energy queue at the primary transmitter. However, the results of the finite…
A Novel Low-Complexity Numerical Localization Method For Dynamic Wireless Sensor Networks
The localization of distributed and wirelessly connected sensor system is of decisive importance for many applications. This paper focuses on the range-based localization and tracking problem for very large dynamic, i.e. moving sensor networks. We study the inexorability of underwater systems with massive swarms of tiny sensors with reduced and restricted capabilities. In this context,…
Power and Load Coupling in Cellular Networks for Energy Optimization
We consider the problem of minimization of sum transmission energy in cellular networks where coupling occurs between cells due to mutual interference. The coupling relation is characterized by the signal-to-interference-and-noise-ratio (SINR) coupling model. Both cell load and transmission power, where cell load measures the average level of resource usage in the cell, interact via the…
Cost Optimal Placement and Backhauling of Small-Cell Networks
The deployment of small cells has been identified as one of the future-proof solutions to cope with the increasing demand for higher data rate and ubiquitous access in mobile networks. However, providing a reliable and cost-effective backhaul connectivity for small cells has become a key challenge. It is identified that the cost efficiency of small-cell…