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.

1. Performance evaluation of an IEEE 802.15.4 sensor network with a star topology Chandramani Kishore Singh Anurag Kumar P. M. Ameer
2. IEEE std. 802.15.4, Part 15.4:Wireless MAC and PHY specifications.
3. For Low-Rate Wireless Personal Are Networks, (2003).
4. Alliance, Z. B. (2003). Draft standard: 02130r4ZB-NWKNetwork layer specification.
5. Ameer, P. M. (2006). Analysis fo Zigbee Network Architectures.
6. for Industrial Sensor Networks, Master of Engineering Thesis.
7. ECE Department, Indian Institute of Science, Bangalore.
8. Bianchi, G. (2000). Performance analysis of the IEEE 802.11.
9. Distributed Coordination Function. IEEE JSAC, 18(3), 535–547.
10. Callaway, Ed, Gorday, P., Hester, L., Gutierrez, J. A., Neave, M.,Heile, B., & Bahl, V. (2002) Home Networking with 802.15.4.
11. Developing standard for low-rate wireless personal area networks.
12. IEEE Communication Magazine, 40(8), 70–77.
13. Chipcon Data Sheet for CC2420 2.4 GHz IEEE 802.15.4/ZigBee Golmie, N., Cypher, D., & Rebala,. (2005).
14. Performance Analysis of low rate wireless technologies for medical applications.
15. Elsevier Comp. and Commun. 28(10), 1266–1275.
16. Goyal, M. (2003). Stochastic Control of Wireless Transmissions Over Multiaccess Fading Channels. Phd Thesis, IISc.
17. Kinney, P. (2003). ZigBee technology: Wireless control that simply works. Communication Design Conference.
18. Kumar, A., Altman, E., Miorandi, D., & Goyal M. (2007).
19. New Insights from a Fixed Point Analysis of Single Cell IEEE 802.11.4.
20. WLANs. IEEE INFOCOM, 3, 1550–1561, March 2005.
21. Zheng, J., & Lee, M. J. (2004). Will IEEE 802.15.4 Make Ubiquitous networking a reality?– A discussion on a potential.

EEE Ubitiquitous