leach is not distributed seletion head cluster.Leach is absolete. ....etc

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A Quick Introduction to Voice over Internet Protocol (VoIP)



Internet Basics

The basic building block of networks is the IP datagram.
Analogy to datagrams—a postcard with
Destination address
Return address
A small amount of text
A postcard might inform you of a friend’s holiday travels or remind you of a dentist’s appointment.
The postal service doesn’t care which application (friend or dentist) sent the postcard—it just carries processed wood pulp with black marks.

Voice—Another A ....etc

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Mobile communications Over Internet Protocol is designed to be totally mobile-centric, and is optimized specifically for mobile-handsets environment rather than the PC. MoIP unlike mobile VoIP, is not a VoIP program made accessible from mobile phones or a switchboard application using VoIP in the background buts it's a form of peer-to-peer communications found on users' handsets, used to conduct talk and chat over the Internet connection as its primary channel via standard mobile communications applications including 3G, GPRS and Wifi.

Most ....etc

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Presented by:Girish R
Voice over IP The protocol specification

Abstract
IP telephony, known in the industry as Voice-over IP (VoIP), is the transmission of tele-phone calls over a data network like one of the many networks that make up the Internet. VoIP involves sending voice transmissions as data packets using the Internet Protocol (IP). In VoIP, user's voice is converted into digital signal, compressed and broken do ....etc

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Cellular Internet Protocol

Abstract :

This document specifies a protocol that allows routing IP datagrams to a mobile host. The protocol is intended to provide local mobility and handoff support. It can interwork with Mobile IP to provide wide area mobility support. Four fundamental design principles of the protocol are: (1) location information is stored in distributed data bases (2) location information referring to a mobile host is created and updated by regular IP datagrams originated by the said mobile host (3) location informat ....etc

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VoIP, or Voice over Internet Protocol refers to sending voice and fax phone calls over data networks, particularly the Internet. This technology offers cost savings by making more efficient use of the existing network.
Traditionally, voice and data were carried over separate networks optimized to suit the differing characteristics of voice and data traffic. With advances in technology, it is now possible to carry voice and data over the same networks whilst still catering for the different characteristics required by voice and data.
Voice-ov ....etc

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Voice over Internet Protocol (VoIP), is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line. Some VoIP services may only allow you to call other people using the same service, but others may allow you to call anyone who has a telephone number - including local, long distance, mobile, and international numbers. Also, while some VoIP services only work over your computer or a special VoIP phone, other services allow you to use a traditional phone connected to a VoIP ....etc

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Definition
Using an ordinary phone for most people is a common daily occurrence as is listening to your favorite CD containing the digitally recorded music. It is only a small extension to these technologies in having your voice transmitted in data packets. The transmission of voice in the phone network was done originally using an analog signal but this has been replaced in much of the world by digital networks. Although many of our phones are still analog, the network that carries that voice has become digital.

In todays phone networks, t ....etc

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Voice Over Internet

In order to develop a high quality real time voice transmission system using VoIP, reliability and predictability are two major problems. Reliability ensures the reliable delivery of voice packet so that loss is concealed from user, whereas predictability avoids the delivery of voice packet with excessive delays and to maintain the certain playback rate. These requirements can be measured by quality of services (QoS) measure. The key QoS measure includes the end-to-end delay, jitter and loss. Jitter is a time diffe ....etc

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VoIP (voice over IP - that is, voice delivered using the Internet Protocol) is a term used in IP telephony for a set of facilities for managing the delivery of voice information using the Internet Protocol (IP).
In general, this means sending voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public switched telephone network (PSTN). A major advantage of VoIP and Internet telephony is that it avoids the tolls charged by ordinary telephone service. ....etc

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