Scenarios and Roadmap Point to point wireless networks EXample: Your laptop to CMU wireless Challenges Poor and variable link quality (makes TCP unhappy) Many people can hear when you talk Pretty well defined Ad hoc networks(wireless++) Rooftop networks(multi-hop, fixed position) Mobile ad hoc networks Adds challenges: routing, mobility Some deployment some research Sensor networks(ad hoc++) Scatter 100s of nodes in a field bridge /etc Adds challenge: Serious resource constraints Current, popular, research Lecture25:11-302006 2Lecture 25:11-30-2006 2 Scenarios and Roadmap • Point to point wireless networks • Example: Your laptop to CMU wireless • Challenges: • Poor and variable link quality (makes TCP unhappy) • Many people can hear when you talk • Pretty well defined. • Ad hoc networks (wireless++) • Rooftop networks (multi-hop, fixed position) • Mobile ad hoc networks • Adds challenges: routing, mobility • Some deployment + some research • Sensor networks (ad hoc++) • Scatter 100s of nodes in a field / bridge / etc. • Adds challenge: Serious resource constraints • Current, popular, research