Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
Chapter 6 Wireless and Mobile Networks - Network and Systems Lab Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
Wireless network taxonomy infrastructure (e.g., APs) no infrastructure single hop host connects to base station (WiFi, WiMAX, cellular) which connects to larger Internet no base station, no connection to larger Internet (Bluetooth, ad hoc nets) multiple hops host may have to relay through several wireless nodes to connect to larger Internet: mesh net no base station, no connection to larger Internet. May have to relay to reach other a given wireless node MANET, VANET 6: Wireless and Mobile Networks 6-10
Wireless Link Characteristics Differences from wired link …. decreased signal strength: radio signal attenuates as it propagates through matter (path loss) interference from other sources: standardized wireless network frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well multipath propagation: radio signal reflects off objects ground, arriving at destination at slightly different times …. make communication across (even a point to point) wireless link much more “difficult” 6: Wireless and Mobile Networks 6-11
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- Page 3 and 4: Chapter 6 outline 6.1 Introduction
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- Page 7 and 8: Characteristics of selected wireles
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- Page 15 and 16: CDMA Encode/Decode sender data bits
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<strong>Wireless</strong> network taxonomy<br />
infrastructure<br />
(e.g., APs)<br />
no<br />
infrastructure<br />
single hop<br />
host connects to<br />
base station (WiFi,<br />
WiMAX, cellular)<br />
which connects to<br />
larger Internet<br />
no base station, no<br />
connection to larger<br />
Internet (Bluetooth,<br />
ad hoc nets)<br />
multiple hops<br />
host may have to<br />
relay through several<br />
wireless nodes to<br />
connect to larger<br />
Internet: mesh net<br />
no base station, no<br />
connection to larger<br />
Internet. May have to<br />
relay to reach other<br />
a given wireless node<br />
MANET, VANET<br />
6: <strong>Wireless</strong> <strong>and</strong> <strong>Mobile</strong> <strong><strong>Network</strong>s</strong> 6-10
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