1,591 research outputs found

    Solutions and Recent Challenges Related to Energy in Wireless Body Area Networks with Integrated Technologies: Applications and Perspectives

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    في هذه الورقة، بحثنا في بعض أحدث بروتوكولات التوجيه الموفرة للطاقة لشبكات منطقة الجسم اللاسلكية. شهدت هذه التكنولوجيا تطورات في الآونة الأخيرة حيث يتم حقن أجهزة استشعار لاسلكية في جسم الإنسان لاستشعار وقياس معايير الجسم مثل درجة الحرارة ونبض القلب ومستوى الجلوكوز. تقوم هذه المستشعرات اللاسلكية الدقيقة بجمع معلومات بيانات الجسم وإرسالها عبر شبكة لاسلكية وإلى المحطة الأساسية. يتم فحص قياسات البيانات من قبل الطبيب أو الطبيب ويقترح العلاج المناسب. يتم إجراء الاتصال بالكامل من خلال بروتوكولات التوجيه في بيئة الشبكة. يستهلك بروتوكول التوجيه الطاقة أثناء المساعدة في الاتصال دون توقف في البيئة اللاسلكية. بسبب الحجم الصغير جدًا ، فإن استهلاك الطاقة مهم جدًا. لقد ركزنا على البروتوكولات التي توفر كفاءة استخدام الطاقة وتحسين عمر الشبكة، والإنتاجية، وفقدان الحد الأدنى من المسار. سنناقش بعض أحدث بروتوكولات التوجيه الموفرة للطاقة في هذه الورقة، في وقت لاحق يتم تقديم مقارنة مع جدول مناسب. بالإضافة إلى ذلك، تمت مناقشة التحديات الأخيرة والتطبيق المحتمل ووجهات النظر.          In this paper, we have investigated some of the most recent energy efficient routing protocols for wireless body area networks. This technology has seen advancements in recent times where wireless sensors are injected in the human body to sense and measure body parameters like temperature, heartbeat and glucose level. These tiny wireless sensors gather body data information and send it over a wireless network to the base station. The data measurements are examined by the doctor or   physician and the suitable cure is suggested. The whole communication is done through routing protocols in a network environment. Routing protocol consumes energy while helping non-stop communication in a wireless environment. Because of the very tiny size, energy consumption matters a lot. We have focused on the protocols, which provide energy efficiency and improve network lifetime, through put and minimal path loss. We will be discussing some of the most recent energy efficient routing protocols in this paper; later their comparison with an appropriate table is presented. In addition, recent challenges, possible application and perspectives are discussed.  &nbsp

    Cross-layer design of multi-hop wireless networks

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    MULTI -hop wireless networks are usually defined as a collection of nodes equipped with radio transmitters, which not only have the capability to communicate each other in a multi-hop fashion, but also to route each others’ data packets. The distributed nature of such networks makes them suitable for a variety of applications where there are no assumed reliable central entities, or controllers, and may significantly improve the scalability issues of conventional single-hop wireless networks. This Ph.D. dissertation mainly investigates two aspects of the research issues related to the efficient multi-hop wireless networks design, namely: (a) network protocols and (b) network management, both in cross-layer design paradigms to ensure the notion of service quality, such as quality of service (QoS) in wireless mesh networks (WMNs) for backhaul applications and quality of information (QoI) in wireless sensor networks (WSNs) for sensing tasks. Throughout the presentation of this Ph.D. dissertation, different network settings are used as illustrative examples, however the proposed algorithms, methodologies, protocols, and models are not restricted in the considered networks, but rather have wide applicability. First, this dissertation proposes a cross-layer design framework integrating a distributed proportional-fair scheduler and a QoS routing algorithm, while using WMNs as an illustrative example. The proposed approach has significant performance gain compared with other network protocols. Second, this dissertation proposes a generic admission control methodology for any packet network, wired and wireless, by modeling the network as a black box, and using a generic mathematical 0. Abstract 3 function and Taylor expansion to capture the admission impact. Third, this dissertation further enhances the previous designs by proposing a negotiation process, to bridge the applications’ service quality demands and the resource management, while using WSNs as an illustrative example. This approach allows the negotiation among different service classes and WSN resource allocations to reach the optimal operational status. Finally, the guarantees of the service quality are extended to the environment of multiple, disconnected, mobile subnetworks, where the question of how to maintain communications using dynamically controlled, unmanned data ferries is investigated

    A critical analysis of research potential, challenges and future directives in industrial wireless sensor networks

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    In recent years, Industrial Wireless Sensor Networks (IWSNs) have emerged as an important research theme with applications spanning a wide range of industries including automation, monitoring, process control, feedback systems and automotive. Wide scope of IWSNs applications ranging from small production units, large oil and gas industries to nuclear fission control, enables a fast-paced research in this field. Though IWSNs offer advantages of low cost, flexibility, scalability, self-healing, easy deployment and reformation, yet they pose certain limitations on available potential and introduce challenges on multiple fronts due to their susceptibility to highly complex and uncertain industrial environments. In this paper a detailed discussion on design objectives, challenges and solutions, for IWSNs, are presented. A careful evaluation of industrial systems, deadlines and possible hazards in industrial atmosphere are discussed. The paper also presents a thorough review of the existing standards and industrial protocols and gives a critical evaluation of potential of these standards and protocols along with a detailed discussion on available hardware platforms, specific industrial energy harvesting techniques and their capabilities. The paper lists main service providers for IWSNs solutions and gives insight of future trends and research gaps in the field of IWSNs

    Proceedings of the 3rd Wireless World (W3) Workshop

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    Energy Efficient Cluster Head Selection Method in Wireless Sensor Network

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    Wireless Sensor Network consists of sensor nodes deployed in a network. Each node is used to send and receive the information. Sensor nodes which having the skills to sense the surroundings, to perform the computation and to interact with other sensor nodes or to the Base station .Distinctive routing protocols and algorithms are introduced to locate manner to lessen the energy consumption in most of the research . This paper gives review at synchronous transit algorithm named Ridge Method Cluster Head Selection (RMCHS), which selects efficient Cluster Heads (CHs) to the sensor network. Also the well known routing protocol LEACH is discussed in terms of its strength and limitations. In this paper our goal is to make network energy efficient by using an enhanced Cluster Head selection method based upon weight and our proposed scheme achieve quiet efficient results than previous techniques. This paper is divides into some sections
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