Adhoc wireless networks are collections of two or more devices that can communicate directly within their radio range and through intermediate nodes outside their radio range. They can take different forms and be mobile, standalone, or networked. Wireless sensor networks consist of minute sensors that help predict decisions through data fusion of acoustic, seismic, image, heat, direction, smoke, and temperature data. They face challenges including device fabrication, power conservation, efficient protocols, distributed computation, data dissemination, scalability, and security. Challenges in adhoc networks also include spectrum allocation, media access, routing, multicasting, energy efficiency, TCP performance, service location and provisioning, and security and privacy.

1. Adhoc Wireless Networks
T S Pradeep Kumar!
http://www.nsnam.com

2. Introduction
a collection of two or more devices equipped with wireless
communications and networking capability."
They can communicate within their radio range directly and
communicate out of their radio range through intermediate nodes"
Adhoc means "Can take different forms" and "can be mobile,
standalone or networked"

4. Wireless Sensor Networks
Minute in size and storage"
even they are small and take the form of a dust."
helpful in predicting decisions by data fusion"
acoustic, seismic, image, heat, direction, smoke and temperature
sensors."
It needs MEMS devices

5. Wireless Sensor Networks
Challenges "
Device fabrication"
power life conservation"
energy efficient protocols"
distributed computation"
data dissemination "
scalability and security

6. Traffic Profiles
Peer to peer communication"
communication will be over a period
of time or one of the node moves away "
Remote to remote communication"
migration in groups"
hybrid communications"
short, abrupt and un-deterministic
communication

7. Challenges in Adhoc Networks
Spectrum allocation and purchase"
MediaAccess"
Routing"
Multicasting"
Energy Efficiency"
TCP Performance"
Service Location, Provision andAccess"
Security and Privacy