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In this paper, a resilient information management (RIM) system for a network isolated environment after disasters is proposed. Using this system, people can manage and share various types of information including medical information, damaged area and map information, and supply/demand information. A RIM system is realized on a locally and quickly established WiFi network environment. Thus, the RIM...
In this paper, we propose a novel architecture for IDMA system with low latency and high throughput for the uplink multi-user wireless system. The throughput of the proposed IDMA system can be improved to about double compared to the conventional IDMA system while the hardware complexity remains unchanged. To achieve this, the proposed system utilizes the interleaver/de-interleaver-less architecture...
Location estimation has become essential for mobile and pervasive computing applications of indoor wireless networks. Trilateration is a basic building block of the range based localization techniques, which requires the set of at least three distances from the known locations, and these distances may be estimated by Received Signal Strength (RSS) using the radio propagation models. The distance estimation...
Due to its highly potential applications in the healthcare and medical fields, Wireless Body Area Network(WBAN) has been attracted from many researches in recent years. In WBANs, an energy efficiency is still a challenging issue. In our previous work [5], we investigated the energy efficiency models of 1-hop and cooperative communications further in multipath fading and proposed the energy efficiency...
In this paper, we propose a new polling-based mechanism for the point coordination function (PCF) in IEEE 802.11 wireless local area network (WLAN). The proposed mechanism uses prioritization on two stages to enhance the ability to support quality of service (QoS) in networks with a high density of access points (APs). First step: in the competition between APs, only one AP can get the right to access...
Due to the massive explosion of social networking and content sharing, it is becoming challenging to transmit a huge amount of multimedia content over wireless mobile networks. The existing paradigm of mobile multimedia sharing has yet to effectively address the energy and bandwidth limitations of wireless devices. Content-Centric Networking (CCN) has been proposed as a possible way to drive the current...
In this paper, we investigate how the performance (i.e., the average message delivery delay) of IEEE 802.15.4-based WSNs is affected by the heterogeneity of wireless communication ranges of sensor nodes. An appropriate control of the wireless communication range of a sensor node should be beneficial in terms of reduced power consumption of the sensor node and performance improvement caused by reduced...
Wearable monitoring systems have been in need for studies of gaits especially freezing of gait detection in patients with Parkinson's disease. The causality of gait freezing is still not fully understood. The histogram of gait freezing is the key assessment of the disease, thus monitoring them in patients' daily life is much appreciated. A real-time signal processing platform for wearable sensors...
Software integrity and medical data secrecy in health care applications are at risk. The existing health care computing infrastructures lack the support of critical cybersecurity features, such as dynamic software integrity verifications and role-based authorization. Health-related operations are being administered and delivered to patients without proper knowledge or awareness about the integrity...
In this paper, we propose a deadline-aware routing algorithm that considers a probabilistic delay constraint with a pre-specified deadline for cyber-physical systems (CPS). Most routing algorithms minimize a certain average performance metric such as mean delay. Whereas, our proposed routing algorithm can route traffic to maximize the probability reached within a given deadline by considering the...
Web of Objects (WoO) is an IoT platform, which is an avenue for better support to connect heterogeneous data sources with the web, because of its modular and plug & play nature. This modular and plug & play approach of WoO, is an amazing support towards the adaptions of other concepts and technologies. The better support based on ontology and semantic based knowledge creations helps in context...
Despite of continuous evolution of Wireless Sensor Networks, Energy exhaustion issue of wireless sensors is still remained. Thus, it is difficult to guarantee the self-sustainability of each sensor. Researchers in areas of energy conservation and energy harvesting have been consecutively developing new methods to increase the lifetime of a sensor. One of the methods is the Adaptive Sampling Algorithm...
A large number of temperature-aware routing algorithms have been proposed to prevent the damage of surrounding tissues caused by temperature rise in wireless body sensor network. But, since the existing temperature-aware routing algorithms for WBSN have not taken account of human postural mobility, large of packet are lost due to topological partitioning. To solve this problem, in this paper, we propose...
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