Wyniki wyszukiwania dla: wireless mesh networks

• Interworking and Cross-layer Service Discovery Extensions for IEEEE802.11s Wireless Mesh Standard

  Publikacja

  • K. Gierłowski

  - Journal of Telecommunications and Information Technology - Rok 2013

  With the rapid popularization of mobile end-user electronic devices wireless network technologies begin to play a crucial role as networks access technologies. While classic point-to-multipoint wireless access systems, based on fixed infrastructure of base stations providing access to clients, remain the main most popular solution, an increasing attention is devoted to wireless mesh systems, where each connecting client can extend...

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• A practical approach to restoration in survivable IP/WDM mesh networks

  Publikacja

  • W. Molisz

  - Rok 2003

  W pracy omówiono warstwową architekturę: IP na optycznej sieci transportowej (OTN). Węzły mają zintegrowaną funkcjonalność: rulerów IP i przełącznic optycznych (OXC). Dopuszcza się możliwość konwersji długości fal na ścieżkach optycznych. Autor rozważa zagadnienie znalezienia ścieżek optycznych o możliwie najniższym koszcie przy spełnieniu ograniczeń przepustowości, wymaganych strumieni zapotrzebowań i zabezpieczonych z góry na...

• Cooperative Data Transmission in Wireless Vehicular Networks

  Publikacja

  • A. Marczak

  - Rok 2017

  The paper presents issues related to the cooperative transmission in wireless vehicular networks. Cooperative transmission involves the use of mobile terminals as relay stations to improve the transmission quality, improve network performance and reduce energy consumption. The paper presents the methods used to implement cooperative transmission and the types of cooperative networks.

• Trust Management Method for Wireless Sensor Networks

  Publikacja

  • A. Turower

  - Rok 2017

  A Wireless Sensor Network (WSN) is a network of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. and to cooperatively pass their data to the main location. The first wireless network that bore any real resemblance to a modern WSN is the Sound Surveillance System (SOSUS), developed by the United States Military in the 1950s to detect and track Soviet...

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• A METHOD OF TRUST MANAGEMENT IN WIRELESS SENSOR NETWORKS

  Publikacja

  • J. Górski
  • A. Turower

  - International Journal of Security, Privacy an d Trust Management - Rok 2018

  The research problem considered in this paper is how to protect wireless sensor networks (WSN) against cyber-threats by applying trust management and how to strengthen network resilience to attacks targeting the trust management mechanism itself. A new method, called WSN Cooperative Trust Management Method (WCT2M), of distributed trust management in multi-layer wireless sensor networks is proposed and its performance is evaluated....

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• Service and Path Discovery Extensions for Self-forming IEEE 802.11s Wireless Mesh Systems

  Publikacja

  • K. Gierłowski

  - Rok 2012

  With the rapid growth of the quantity and capabilities of end-user electronic devices, both stationary and mobile, they are employed in increasing number of applications. In this situation, wireless network technologies begin to play a crucial role as networks access technologies, as cable-based solutions tend to be of limited utility in case of easily portable or mobile devices. Resulting development of wireless technologies reached...

• Optimization of Wireless Networks for Resilience to Adverse Weather Conditions

  Publikacja

  • M. Pióro
  • E. Fitzgerald
  • I. Kalesnikau
  • D. Nace
  • J. Rak

  - Rok 2020

  In this chapter, we consider how adverse weather conditions such as rain or fog affect the performance of wireless networks, and how to optimize these networks so as to make them robust to these conditions. We first show how to analyze the weather conditions in order to make them useful for network optimization modelling. Using an example realistic network, we show how to optimize two types of wireless networks: free-space optical...

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• Wireless Networks as an Infrastructure for Mission-Critical Business Applications

  Publikacja

  • K. Gierłowski
  • K. Nowicki

  - Rok 2007

  Despite the dynamic growth of wireless network systems, their pres-ence in business-support infrastructure has been limited. In the article we provide an overview of generic corporate network architecture and examine usefulness of available wireless network solutions in such systems. Following this overview we analyze new wireless network architecture which currently undergoes standardization process - wireless mesh. It can result...

• A hybrid-mesh solution for coverage issues in WiMAX metropolitan area networks.

  Publikacja

  • K. Gierłowski
  • J. Woźniak
  • K. Nowicki

  - Journal of Telecommunications and Information Technology - Rok 2008

  The new WiMAX technology offers several advantages over the currently available (GSM or UMTS-based) solutions. It is a cost effective, evolving, and robust technology providing quality of service guarantees, high reliability, wide coverage and non-line-of-sight (NLOS) transmission capabilities. All these features make it particularly suitable for densely populated urban environments. In this paper we discuss the design and implementation...

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• CRVG - a new model for wireless networks topology generation

  Publikacja

  • T. Gierszewski
  • W. Molisz

  - Rok 2009

  This paper presents a new model of wireless network topology generator. Its main advantage is the possibility of relatively sparse networks generation. Because no iteration is needed, the model can be used for massive generation of networks for testing. The topological properties of produced graphs place them in the class of scale free networks, resembling real ones.