A wireless mesh network (WMN) consists of mesh clients, mesh routers, and gateways organized in a mesh topology. It is self-forming, self-healing, and allows multi-hop connections. In contrast, a wireless ad-hoc network is a decentralized wireless network that does not rely on existing infrastructure and where devices communicate directly with each other without an access point. Key differences are that WMN relies on some fixed infrastructure and supports multi-hop traffic to gateways, while ad-hoc networks are fully infrastructure-independent and support user-to-user traffic. Both utilize various routing protocols for path selection between nodes.

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