By Neeli Prasad
Instant neighborhood region Networks (WLANs) supply practitioners a good way to accomplish community connectivity in tough wiring components and supply stronger flexibility for relocating and lengthening networks. this day the main severe WLAN/Wireless IP (Internet Protocol) matters contain protection, mobility, and caliber of carrier, and this sensible new source addresses those sizzling issues headon. The e-book offers pros an effective figuring out of significant criteria and provides a variety of networking innovations for his or her not easy tasks within the box. additionally, practitioners locate suggestions on deployment, insights on interworking with 3rd new release cellular communications structures, and discussions out there and company facets of WLANS.
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Additional info for 802.11 WLANs and IP Networking: Security, QoS, and Mobility
Work on integration of the WLANs and the WPANs must also be done. The biggest technical challenge here will be the coexistence of the two devices as both of them work in the same frequency band. FWA is a technology that should be watched as it develops; depending on its market penetration and development of standards it should also be integrated together with other technologies. Another area of research for the next generation communications will be in the field of personal networks (PNs) .
Shadowed areas tend to be large, resulting in the rate of change of the signal power being slow. It is termed slow-fading, or log-normal shadowing because the distribution of the logarithm of the amplitude is normal. Introduction 13 . 10 0 10 Signal Strength (dB) 20 30 40 0 50 100 150 200 250 . 10 Typical Rayleigh fading while the mobile unit is moving. 1 Rayleigh Fading In a radio link, the RF signal from the transmitter may be reflected from objects such as hills, buildings, or vehicles. This gives rise to multiple transmission paths at the receiver.
An example of connecting transportation with Wi-Fi is that in India the government has equipped unlicensed devices on public buses and allowed all Wi-Fi devices to operate at high power. Thus, the bus while driving through neighborhoods updates all the Internet accounts in the neighborhood. Similarly when driving past backbone node it wirelessly updates and is updated by the rest of the network. This is applicable only for asynchronous services such as e-mail and downloading applications. Nonetheless, it is very inexpensive to create ubiquitous Internet and broadband access.