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Wireless multi-hop networks are scalable in that devices can easily connect to the network. Such scalability is also required in IoT. However, wireless multi-hop network mostly suffers from high probability of transmission failure due to interference, and nodes connected to the network often experience connection loss and subsequent segment loss which node mobility and routing update incur. Due to...
Graph-based topology control adapts wireless topologies to achieve certain target graph structures. Wireless sensor networks seem well-suited for the expectations (in particular those on provided energy savings) raised by topology control. Nevertheless, topology control has never made the breakthrough in real-world deployments. This work explores the reasons for this, identifying five practical obstacles...
Using OAM mode in wireless communication could be a powerful approach to enhance spectral efficiencies. An effective method for making OAM mode antenna with planar patch antennas was proposed. To verify this method, OAM mode (l = +1) antenna which has an 8-way radial power divider and uniformly circular-arrayed patch antennas was designed and tested.
This paper presents the architecture of GENI edge cloud computing network in the form of compute and storage resources, a mobile 4G cellular edge and a high speed campus network connecting these components. This deployment is available across fifty campuses in the US, all interconnected via a nationwide Layer-2 network. We present these capabilities in the context of vehicular sensing and control...
Location management, accomplished through the backbone network and wireless links, is an important issue in a personal communication system (PCS). In this paper, we present a unified model to assess three dynamic location update strategies, including the distance-based, movement-based and time-based schemes, based on a seven-state Markovian mobility model on a two-dimensional hexagonal cellular topology...
The emergence of Network-on-Chip (NoC) as a communication paradigm for Multi-Processor System-on-Chips (MPSoCs) significantly exacerbates the need to provide a methodology that optimizes the energy consumption of the overall system. This is especially important when factoring in current Network-on-Chip advances which have multiple communication media such as on-chip wireless or nano-photonics links,...
Intelligent Transportation System (ITS), the safety-related message is propagated based on the wireless communications through vehicle to vehicle (V2V) and vehicle to infrastructures (V2I) in vehicular Ad hoc networks (VANETs) environments. Hence, the network connectivity is a key requirement for successfully safety-related message propagation. In this paper, we analyze the influence of vehicle density...
Existing topology controls enable wireless nodes to control parameters, such as adjusting the transmission power or switching operating modes between a sleep mode and an active mode, to achieve energy savings and prolong network lifetime. However, the topology controls assume that the operating frequency is fixed or can be changed in a narrow range of frequencies, thus the communication distance is...
Wireless industrial communication systems are increasingly deployed for process automation and sensor/actuator networks with moderate requirements on latency and reliability. Many closed-loop control systems with more challenging latency and reliability requirements would benefit from wireless communication as well and have therefore become a research field of increasing interest in recent year. In...
Communication in industrial applications like factory automation (FA) demands very low latency combined with high reliability. Since state of the art wireless technologies are not entirely fulfilling FA requirements, novel approaches are being developed.
In most of the systems, data collection is one of the major tasks to be carried out. The way of data collection can be automatic or manual. Adversity is the main cause that in many systems, manual intervention is not possible. So, opting for automated way isn't such bad idea. Depending upon the way of communication, wired or wireless, data can be collected through either wired or wireless networks...
Polarization diversity is generally achieved by using two orthogonal polarizations on the same link, which enables to double the available bandwidth. In this paper, we study the possibility to connect the nodes of a line-of- sight ring topology network with one single channel for all the links, with the condition that the polarization of any link is orthogonal to the polarization of the two adjacent...
Software defined network empowers the creation of a flexible network architecture by abstracting flow control from individual devices to the network level. In this paper, we address the challenges in applying SDN to develop high- performance vehicular networks. We present SDVN, a new SDN based vehicular network architecture. It organizes the topology of the vehicular networks and utilizes vehicle...
Topology topic has gained additional and special interest in the field of Wireless Sensor Networks (WSN). While WSN deployments are in general optimized by the known fundamental network topology, another trend is to enhance WSN by managing the network topology. Many propositions have been tested in this field, like topology directed routing, cooperating schemes, sensor coverage based topology control...
The nature of wireless sensor networks make them very attractive to attackers. Network layer have ability to swap network service data units between two transport entities above a network connection depending same feature like latency and energy. The network layer deals with directing the information supplied by the transport layer. It is in charge of determining the task of locations and how parcels...
Optimal reliable routing is studied in the context of fading wireless body area networks (WBANs). A non-cooperative game is proposed to model and analyze the strategic interactions among body-worn health-care devices when each seeks to find the most reliable path to the hub. A distributed algorithm based on the proposed game is provided and proved to converge to a multi-hop Pareto-dominant Nash topology...
Advancement in wireless and microsystems technology have ushered in new devices that can directly interface with the central nervous system for stimulating and/or monitoring neural circuitry. In this paper, we present an ultra low-power sigma-delta analog-to-digital converter (ADC) intended for utilization into large-scale multi-channel neural recording implants. This proposed design, which provides...
A kind of Multi-UAVs cooperative control algorithm under a disaster search and rescue scenario is presented. The states of UAVs are separated as search and relay. In search state, UAVs constantly look for wireless signals from the ground rescue workers by planning path under communication constraints. In relay state, UAVs share information without delay by selecting information route and planning...
The topology of balanced amplifiers has conventionally been one of good solutions for broadband amplifiers. Although feedback amplifiers have broader band characteristics than normal single-ended amplifiers, balanced amplifiers have been more popular with their additional technical advantages such as high output power, redundancy, and many productive applications in wireless systems. However, in most...
Wireless Sensor and Actor Networks (WSAN) have been very popular from the research community because of their suitability for real time systems. To maintain inter-actor connectivity is crucial in real time situations where actors have to quickly take corrective actions to detected events. Failure of actor and sensors partitions the inter-actor network into disjoint segments, and thus disrupt the network...
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