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IEEE 802.15.4 Makes Ubitiquitous Networking a Reality

Author(s): Nikhil. N. Kant | V. N. Bhonge | Niraj. N. Kant

Journal: International Journal of Computer Applications
ISSN 0975-8887

Volume: ncipet;
Issue: 7;
Date: 2012;
Original page

The new IEEE 802.15.4 shows promise to bring networking in to out lives, At least technically. Unlike other standard targeting high-or-moderate-data-rate applications, IEEE 802.15.4 is global standard designed for low data rate, low power consumption and Low cost application. This so called enabling standard will bring many simple, originally Standalone devices in a networks and thus not only open door to an enormous number of new applications, But also add new values to existing applications. One class of application investigated for the IEEE 802.15.4 LR-WPAN (Low Data Rate-Wireless Personal Area Network) standard is wireless for monitoring and control applications. In this work an analytical performance model is provided for an IEEE 802.15.4 network with a star topology. The sensors are at the tips of the star, and the objective of the networks is that the sensors should be able to transmit their measurements to the hub node so that certain objectives for packet delay and packet discard rate are met. We first carry out a saturation throughput analysis of the system; i.e., it is assumed that each sensor has an infinite backlog of packets and the throughput of the system is sought. After a careful analysis of the CSMA/CA MAC that is employed in the standard, and after making a certain decoupling approximation, we identify an enabled Markov renewal process, whose analysis yields a fixed point equation. Solution of this fixed point equation yields certain quantities from which the throughput can be calculated.
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