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Developing wireless application for secure electric power meter reading using bluetooth

- Patel, Keyurkumar, Tam, Wing, Tran, Nguyen

Performance analysis of m-retry BEB based DCF under unsaturated traffic condition

- Siddique, Md, Kamruzzaman, Joarder

  • Authors: Siddique, Md , Kamruzzaman, Joarder
  • Date: 2010
  • Type: Text , Conference paper
  • Relation: 2010 IEEE Wireless Communications and Networking Conference (WCNC) p. 1-6
  • Full Text: false
  • Reviewed:
  • Description: The IEEE 802.11 standard offers a cheap and promising solution for small scale wireless networks. Due to the self configuring nature, WLANs do not require large scale infrastructure deployment, and are scalable and easily maintainable which incited its popularity in both literature and industry. In real environment, these networks operate mostly under unsaturated condition. We investigate performance of such a network with m-retry limit BEB based DCF. We consider imperfect channel with provision for power capture. Our method employs a Markov model and represents the most common performance measures in terms of network parameters making the model and mathematical analysis useful in network design and planning. We also explore the effects of packet error, network size, initial contention window, and retry limit on overall performance of WLANs.

Coexistence mechanism for industrial automation network

- Yaqub, Muhammad, Gondal, Iqbal, Kamruzzaman, Joarder

  • Authors: Yaqub, Muhammad , Gondal, Iqbal , Kamruzzaman, Joarder
  • Date: 2010
  • Type: Text , Conference paper
  • Relation: 12th IEEE International Conference on High Performance Computing and Communications
  • Full Text: false
  • Reviewed:
  • Description: Increase in the number of coexisting networks in license free Industrial, Scientific and Medical (ISM) band causes interferences for industrial automation, e.g., shop floors of manufacturing facilities. In order to ensure the reliability for automation networks, interference avoidance schemes are required. This paper proposes a novel Predefined Hopping Pattern (PHP) technique for frequency hopping in ISM band, which mitigates self-interferences and static interferers as well. This technique generates optimized frequency hopping sequences which ensure sufficient frequency diversity and frequency offset among the coexisting Bluetooth piconets and exploits transmission experiences for a particular frequency in eliminating interference. Simulation studies have shown that PHP has better collision avoidance rate than well known adaptive frequency hopping (AFH) and adaptive frequency rolling (AFR) schemes.

A reconfigurable scatternet formation and maintenance scheme with heterogeneous services for smart Bluetooth devices

- Imran, Muhammad, Bakhsh, Sheikh, Tahir, Sabeen, Basheri, Mohammed, Shoaib, Muhammad

  • Authors: Imran, Muhammad , Bakhsh, Sheikh , Tahir, Sabeen , Basheri, Mohammed , Shoaib, Muhammad
  • Date: 2018
  • Type: Text , Journal article
  • Relation: Sustainable Cities and Society Vol. 40, no. (2018), p. 589-599
  • Full Text: false
  • Reviewed:
  • Description: Bluetooth Inter-piconet communication necessitates deployment of relay nodes. However, network performance is affected with the increased count of relays due to high control overhead. Moreover, the mobility and power failure of a relay node may partition the network, which affects scatternet performance. This research aims to maintain scatternet connectivity without employing redundant relays. This paper presents a Scatternet Formation and Maintenance (SFM) scheme that strives to sustain scatternet connectivity. To minimize control and flooding overhead, SFM removes redundant relays without disconnecting the scatternet. Moreover, backup relays are employed to avoid network partitioning. To avoid a link disconnection, Bluetooth devices in SFM continuously keep track of movement and residual energy. A moving node notifies its master before disconnecting any communication link to make an alternative arrangement for a backup. A backup relay is activated to maintain existing communication links. In addition, backup relay activation improves the performance of synchronous connection oriented and asynchronous connection less links. The proposed technique also reduces control messaging overhead for relay optimization from O(n2) to O(n). Simulation results validate effectiveness and efficiency of the proposed scheme for inter-piconet communication. © 2018 Elsevier Ltd
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