Self-Managed Future Wireless Networks?

1
Self-Managed Future Wireless Networks?

• Lixin Gao
• University of Massachusetts, Amherst

2
Manageability as a Goal

• Complexity
• Do we even know how to quantify?
• Typical metrics
• Performance throughput
• Energy consumption
• Protocol Verification
• Wellbehaved nodes
• Malicious nodes
• Selfish nodes

• Monitoring
• Trouble-shooting
• Visibility
• Self-healing
• Robustness

3
Too Early to Think about Manageability?

• Lessons learned from the Internet
• BGP
• the de facto standard of interdomain routing
• Largest distributed system
• What do we know about its property?
• Stability
• Reliability 99.999?

4
No Guarantee of Long-Term Stability

• Simple extension of path vector protocol
• Policy-based routing

• Unstable state
• AS1 (0)
• AS2 (0)
• Stable state
• AS1 (0)
• AS2 (1, 0)

5
Packet Loss due to Transient Blackhole or Loops

• Failover events 76 packets lost
• Recovery events 26 packets lost

Recovery
Failover
6
Transient Blackhole or Loops
Forwarding Loops
Blackhole