Mesh networks (for public safety)
Overview
Mesh components
Mesh requirements
Store-forward vs. Store-carry-forward
Taxonomy
Taxonomy, cont’d.
Relationships: Local mesh vs. funnel
Mobility
Three kinds of mesh nodes
Mesh network capacity
Example alternative: Inmarsat BGAN
Example: AT&T remote mobility zone
Example: Amateur radio
Conclusion

Mesh network capacity
Does adding nodes add per-node capacity?
Depends strongly on assumptions:
locality of traffic (local vs. funnel to Internet)
interference  power control, directional antennas
node distribution
traffic distribution (uniform vs. hot spot)
Simplified assumptions
per-user throughput < c2W/√(n log n) for link rate W and n nodes
can be as low as W/n