1. WIRELESS MESH
NETWORK
VS
AD-HOC NETWORK

2. GIST
1.
WMN
2.
AD-HOC
3.
CHARACTERISTICS
4.
ROUTING PROTOCOL
5.
CHANNEL ALLOCATION
6.
COGNITIVE RADIO IN WMN AND ADHOC NETWORK

3. 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

4. CHARACTERISTICS OF WMN

Self-forming

Self-healing

Multi-hop

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
 Multihop
 Multihop
 Nodes are wireless, possibly
 Nodes are wireless, some
mobile
mobile and some fixed
 Infrastructure independent
 It relies on infrastructure
 Most traffic is user-to-user
 Most traffic is user-togateway

8. 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

9. TYPES OF ROUTING PROTOCOL
PROACTIVE-DSDV
REACTIVE-AODV
HYBRID

10. 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

11. COGNITIVE RADIO IN WMN AND AD-HOC
NETWORKS

12. THANK YOU