3. WIRELESS MESH NETWORK
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A wireless mesh network (WMN) is a communications network made up
of radio nodes organized in a mesh topology
It consists of
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Mesh clients
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Mesh routers
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Gateways
5. AD-HOC
A wireless ad hoc network is a decentralized type of wireless network . The network
is ad hoc because it does not rely on a pre existing infrastructure, such as routers in
wired networks or access points in managed (infrastructure) wireless networks
6. INFRASTRUCTURE AND AD-HOC MODE
INFRASTRUCTURE MODE
An 802.11 networking framework in which devices communicate with each other by first
going through an Access Point (AP).
AD-HOC MODE
An 802.11 networking framework in which devices or stations communicate directly with
each other, without the use of an access point (AP).
7. Mesh vs. Ad-Hoc Networks
Ad-Hoc Networks
Wireless Mesh Networks
ï Multihop
ï Multihop
ï Nodes are wireless, possibly
ï Nodes are wireless, some
mobile
mobile and some fixed
ï Infrastructure independent
ï It relies on infrastructure
ï Most traffic is user-to-user
ï Most traffic is user-togateway
8. ROUTING PROTOCOL
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A routing protocol specifies how routers communicate with each other, disseminating
information that enables them to select routes between any two nodes on a computer
network
PERFORMANCE METRICS
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HOP COUNT
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ETX
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ETT
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PATH AVAILABILITY
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WCETT
10. CHANNEL ALLOCATION
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Channel allocation deals with the allocation of channels to cells in a cellular
network.
TYPES OF CHANNEL ALLOCATION
Fixed Channel Allocation
Dynamic Channel Allocation