WiMax Operator's Manual

200 ■INDEX
figures (continued)
edge routers, 67
Ethernet switch in wireless network, 136
frequency versus atmospheric attenuation
characteristics, 38
frequency versus reuse in cellular
architecture, 104
hybrid fiber coax network, 19
MDU installation, 124
mesh architecture, 82
multipath reflections, 114
passive optical network, 74
point-to-consecutive point networks, 81
point-to-multipoint network, 80
polarization states, 111
relay network, 16
router in wireless network, 133
voice-over IP, 139
wireless public network, 141
financial officers, planning for, 96
firewalls
considering in central offices, 146
maintenance and administration of, 157
and proxy servers, 191
First Avenue Web site, 47
flooding attacks, characteristics of, 192–193
flow-based protocol, RSVP as, 166–167
foliage, impact on signal transmission, 36
FPGAs (field programmable gate arrays), use
with software-defined radios, 49
FRADs (frame relay access devices)
accessing, 15–16
considering for central offices, 141
frame relay
versus DSL, 17
overview of, 15–16
frame relay-switching equipment,
considering in central offices,
140–141
free-space optics for backhaul, overview of,
76, 78
frequencies
agility of, 49
for backhaul, 77
of lower microwave, 34–35
lower microwave, 47–48
of radio transmissions, 34–35
for wireless broadband, 35
frequency hopping, managing interference
with, 90
frequency modulation versus phase shift
keying, 122
frequency reuse
and cell splitting, 111–112
in cellular architecture, 104
and polarization diversity, 110–111
relationship to line of sight and non–line
of sight, 112–121
role of repeaters in, 108–109
role of sectorization in, 109–110
frequency-agile radios
description of, 49
and network mapping, 122
Fresnel zones, computing, 88–89
FSO (free-space optics), overview of, 40–41
■G
global addresses, significance of, 132
godbox, description of, 67–68
grid computing, potential of, 61
growth patterns, projecting relative to cell
mapping, 106–107
GSM (Global System for Mobile
Communications), relationship to
HSDPA, 2
■H
H.323 standard, use with VoIP, 173
hackers, motives of, 190
“handoffs,” role in point-to-multipoint
networks, 103