Wireless Challenges Force us to rethink many assumptions Need to share airwaves rather than wire Don't know what hosts are involved Host may not be using same link technology Mobility Other characteristics of wireless Noisy→ lots of losses Interaction of multiple transmitters at receiver Collisions, capture, interference Multipath interference 1-08-07 ecture 21: Wireless Networking 211-08-07 Lecture 21: Wireless Networking 2 Wireless Challenges • Force us to rethink many assumptions • Need to share airwaves rather than wire • Don’t know what hosts are involved • Host may not be using same link technology • Mobility • Other characteristics of wireless • Noisy → lots of losses • Slow • Interaction of multiple transmitters at receiver • Collisions, capture, interference • Multipath interference