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

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