Performance Study of IEEE 802.15.4/4g Waveforms over the Mobile Underground Mine Radio-Channel

2016 ◽  
Author(s):  
Mohamed Said Mezghanni ◽  
Nahi Kandil ◽  
Nadir Hakem
Keyword(s):  
Ieee 802.15.4 ◽  
Radio Channel ◽  
Underground Mine ◽  
Performance Study

scholarly journals Low-Complexity Localization and Tracking in Hybrid Wireless Sensor Networks

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
S. Kianoush ◽  
E. Goldoni ◽  
A. Savioli ◽  
P. Gamba
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Ieee 802.15.4 ◽  
Radio Channel ◽  
Low Complexity ◽  
Wireless Sensor ◽  
Distance Measurements ◽  
Exact Position ◽  
A New Technique ◽  
Target Path

Localization in Wireless Sensor Networks (WSNs) is an important research topic: readings come from sensors scattered in the environment, and most of applications assume that the exact position of the sensors is known. Due to power restrictions, WSN nodes are not usually equipped with a global positioning system—hence, many techniques have been developed in order to estimate the position of nodes according to some measurements over the radio channel. In this paper, we propose a new technique to track a moving target by combining distance measurements obtained from both narrowband IEEE 802.15.4 and Ultrawideband (UWB) radios, and then exploiting a novel speed-based algorithm for bounding the error. This process is applied to a real dataset collected during a measurement campaign, and its performance is compared against a Kalman filter. Results show that our algorithm is able to track target path with good accuracy and low computational impact.

Performance Study of a New CSMA/CA Access Method with QoS Based on 802.11b and Comparison with 802.15.4/ZigBee

2013 ◽  
Vol 2 (3) ◽  
pp. 94-112 ◽  
Author(s):  
Faiza Charfi ◽  
Walid Labidi ◽  
J. Marc Thiriet
Keyword(s):  
Wireless Network ◽  
Ieee 802.15.4 ◽  
Wide Spectrum ◽  
Extended Model ◽  
Performance Study ◽  
Ieee 802.11B ◽  
Network Resources ◽  
Quality Of Control ◽  
Control Feedback

Wireless Network Controlled Systems (WNCSs) are a new area of research which concerns the implementation of control strategy over wireless networks. Therefore, many potential applications of Wireless Sensor Networks (WSNs) span a wide spectrum in various domains. The dependability of the WNCSs becomes a strong requirement due to real-time requirements of control. The Quality of Control (QoC) is performed through optimally allocating the network resources to ensure the Quality of Service (QoS) and optimally designing controller to compensate for time delays in the control feedback loop. The IEEE 802.11b standard is a really widespread wireless network. However, some QoS properties are missing, compared to more specific protocols, such as 802.15.4. In this paper, the authors present the implementation of an extended model of the IEEE 802.11b standard in order to add more QoS properties through the use of CSMA/CA with the combination of the frame selection sort and the First Come First Served (FCFS) scheduling methods. The control performances of the new model are compared to those of IEEE 802.15.4 with QoS. Several improvements are achieved including a reduction in the number of collisions and priority-based flow control.

Co-Existence of WLAN and WPAN Communication Systems

2011 ◽  
pp. 322-331
Author(s):  
Khaled Shuaib ◽  
Mohamed Boulmalf
Keyword(s):  
Ieee 802.11 ◽  
Communication Systems ◽  
Ieee 802.15.4 ◽  
Radio Channel ◽  
Ieee 802.11B ◽  
Ism Band ◽  
Channel Interference ◽  
The Impact

Recently applications and technologies utilizing the free industrial, scientific, and medical (ISM) band have grown exponentially. Mainly there are three dominant technologies operating at the ISM 2.4 GHz band, IEEE 802.11 b/g, Bluetooth and IEEE 802.15.4 or Zigbee. With the diverse deployment and broad range of applications running over such technologies, it is inevitable that radio channel interference between devices utilizing such technologies exist. In this chapter we focus on co-existence issues between such technologies and on the quantification of the impact of Bluetooth on IEEE 802.11b/g.

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