28-06-2012, 12:24 PM
Mesh Based Multicast Routing in Ad Hoc Networks
[attachment=25896]
Introduction
Multicasting
Group communication
One-to-many
In Battle field
Many-to-many
Rescue team communication
Why not using existing multicast protocol
Resource constraints
Frequent tree reorganization
signaling overhead
loss of datagram
Protocol design
robustness
ODMRP
Observation
Sender Forms and Maintains the multicast group
Don’t need to be built on top of a unicast routing protocol
Richer connectivity
May have multiple routes for one particular destination
Helps in case of topology changes and node failures
soft state
Member nodes are refreshed as needed by source
Do not send explicit leave message
Periodic Broadcast of Join Request
Control overhead of route refreshes => Scalability issue.
Conclusion
State of the Art
MAODV
Low overhead
Low latency
ODPRP
Backup paths
Scalability issues
Holes at Energy Saving
[attachment=25896]
Introduction
Multicasting
Group communication
One-to-many
In Battle field
Many-to-many
Rescue team communication
Why not using existing multicast protocol
Resource constraints
Frequent tree reorganization
signaling overhead
loss of datagram
Protocol design
robustness
ODMRP
Observation
Sender Forms and Maintains the multicast group
Don’t need to be built on top of a unicast routing protocol
Richer connectivity
May have multiple routes for one particular destination
Helps in case of topology changes and node failures
soft state
Member nodes are refreshed as needed by source
Do not send explicit leave message
Periodic Broadcast of Join Request
Control overhead of route refreshes => Scalability issue.
Conclusion
State of the Art
MAODV
Low overhead
Low latency
ODPRP
Backup paths
Scalability issues
Holes at Energy Saving