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WIRELESS MESH NETWORK
VS AD-HOC NETWORK
GIST
1. WMN
2. AD-HOC
3. CHARACTERISTICS
4. ROUTING PROTOCOL
5. CHANNEL ALLOCATION
6. COGNITIVE RADIO IN WMN AND ADHOC NETWORK
WIRELESS MESH NETWORK
A wireless mesh network (WMN) is a communications network made up of radio nodes organized in a mesh topology
It consists of
Mesh clients
Mesh routers
Gateways
CHARACTERISTICS OF WMN
Self-forming
Self-healing
Multi-hop
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
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).
Mesh vs. Ad-Hoc Networks
Multihop Nodes are wireless, possibly mobile
Infrastructure independent Most traffic is user-to-user
Ad-Hoc Networks Wireless Mesh Networks Multihop Nodes are wireless, some mobile and some fixed
It relies on infrastructure Most traffic is user-to-gateway
ROUTING PROTOCOL
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
HOP COUNT
ETX
ETT
PATH AVAILABILITY
WCETT
TYPES OF ROUTING PROTOCOL
PROACTIVE-DSDV
REACTIVE-AODV
HYBRID
CHANNEL ALLOCATION
Channel allocation deals with the allocation of channels to cells in a cellular
network.
TYPES OF CHANNEL ALLOCATION Fixed Channel Allocation
Dynamic Channel Allocation
COGNITIVE RADIO IN WMN AND AD-HOC NETWORKS
THANK YOU