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Handbook of Wireless Local Area Networks: Applications, by Mohammad Ilyas, Syed A. Ahson

By Mohammad Ilyas, Syed A. Ahson

Instruction manual of instant neighborhood zone Networks: purposes, know-how, safety, and criteria captures the present nation of instant LANs, and serves because the unmarried finished reference at the topic. Addressing demanding situations regarding the additional improvement of WLAN expertise, the guide covers the complete spectrum of subject matters from easy recommendations to analyze grade material.Consisting of 25 articles contributed by means of specialist authors from all over the world, the instruction manual starts off with an in depth advent that offers an outline of LAN applied sciences, functionality, safeguard, and safety protocols. It then delves extra into WLAN know-how, overlaying space-time processing, WLAN and mobile convergence, and a peer-to-peer method of roaming, besides different issues. The instruction manual maintains via exploring WLAN functions, by way of an in depth dialogue of protection that comes with safeguard concerns and the stairs that may be taken to reduce WLAN defense hazards. this article concludes with an research of criteria, describing 3G UMTS - IEEE 802.11b internetworking and safeguard.

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Extra resources for Handbook of Wireless Local Area Networks: Applications, Technology, Security, and Standards

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For example, when one wireless device connects to a WLAN at a lower bit rate than other devices due to being too far from the AP, performance of other network devices degrades. 11e, which defines QoS mechanisms to support bandwidth-sensitive applications such as voice and video. 11 data frames into smaller pieces sent separately to the destination. Each fragment consists of a MAC layer header, FCS (frame check sequence), and a fragment number indicating its position within the frame. With properly set values, fragmentation can reduce the amount of data that needs retransmission because the station only needs to retransmit the fragment containing the bit errors.

CONCLUSIONS WLAN performance issues and three sample models are presented in this chapter. We note that currently the performance of WLAN systems largely relies on the PHY layer performance. RF coverage and proper placement of APs play an important role in improving performance. Often, RF interference and poorly designed network setup may cause reduced access speeds, sometimes due to problems caused by hidden downstream terminals that are not detected by a far station. However, the hidden-terminal problem may largely be controlled by the RTS/CTS mechanism or the available fragmentation option.

Calhoun and C. txt (work in progress), November 2001. 16. A. Hess and G. Shafer, Performance Evaluation of AAA/Mobile IP Authentication, technical report, Technical University, Berlin, 2001. 17. Helen J. , Policy-Enabled Handoffs Across Heterogeneous Wireless Networks, 2nd IEEE Workshops on Mobile Computing and Applications (WMCSA ’99), New Orleans, February 1999. 18. C. Perkins, Mobile IP Joins Forces with AAA, IEEE Personal Communications Magazine, pp. 59–61, August 2000. 19. C. Perkins and P.

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