Virginia Tech

Department of Computer Science

CS6504 Mobile Computing

Spring 2007

Homework 4 (Total 50 pts)

Due in class on Wednesday March 21^st, 2007

Please answer the following questions using your own words.

Q1. (15 pts) Bluetooth

· Compare a piconet and a scatternet.

· In your own words, explain the purpose and functionality of the L2CAP layer.

· Summarize how packet forwarding is performed in a scatternet.

Q2. (5 pts) Explain what is meant by two-tier addressing in the context of a network-layer mobility support protocol.

Q3. (10 pts) Summarize route optimization in the context of Mobile IPv4.

Q4. (20 pts) Write a report about Mobile IPv6. Provide a list of any technical references you consult. Hint: outline what architectural entities are needed and their tasks. In addition, explain how handoffs are handled. In essence, explain how MIPv6 is a network-layer mobility support protocol.