29-05-2013, 04:35 PM
MOBILE AD-HOC NETWORKS
MOBILE AD-HOC.pptx (Size: 124.08 KB / Downloads: 26)
MANETs
Dynamic network of autonomous mobile nodes
Uses wireless links without existing infrastructure
Does not use centralized administration
Dynamic network leads to high rate of topology
changes
Topology changes occur both rapidly and unexpectedly
MANETs are often referred to as multihop
wireless ad hoc networks
Key Elements of MANETs
Formed dynamically through the cooperation of independent nodes
Nodes do not have any pre-specified roles
Nodes make decision independently based on the current network situation
Nodes are expected to behave as routers
As routers, nodes must assist in discovery and maintenance of network routes
Cellular Wireless
Single hop wireless
connectivity to the wired
world
– Space divided into cells
– A base station is
responsible to
communicate with hosts in
its cell
– Mobile hosts can change
cells while communicating
– Hand-off occurs when
a mobile host starts
communicating via a new
base station