IP PACKETS

Method Of Prioritisation Among IP Packets

Method Of Prioritisation Among IP Packets

Introduction

Voice Over Internet Protocol (VoIP) and Internet Protocol (IP) Telephony concepts are hot prospects for the near future. This is because using Internet as a voice delivery mechanism has several advantages over traditional telephone system. An important advantage of VoIP and IP Telephony comes from the capabilities of Internet which not only allows traditional telephone services but also supports video, shared collaboration tools and especially through multicasting, multiparty conferences that can scale from small group meetings to large group audiences. (Bolot, 2008: pp 255)

As transmission and reception of real time data is time critical, for acceptable real-time data delivery, distribution of real time traffic for multiparty conferences over an IP network is established through IP Multicasting. IP multicasting is an efficient way of distributing data at the same time to multiple receivers removing the needed for duplicating each packet sent to each recipient. IP Multicasting consists of two parts, namely, local group management and global multicast routing. Local group management protocols allow routers to learn about the groups, which are requested to be received from the subnetworks to which each router is directly attached. Multicast routing protocols stipulate that routers determine the effective paths to send/receive packets to multicast groups.

In today's global world, the ability to reliably communicate with people in distant locations is increasingly important. In the absence of face-to-face interactions, voice communication is considered one of the most effective forms of communication. In the last century, the traditional approach to satisfy this demand has been the deployment of networks specialized to carry voice signals between specialized devices such as land-line and wireless phones. With the proliferation of IP networks around the world that can deliver connectivity to a wider set of devices in a more cost effective manner, the possibility to extensively utilize IP networks for real-time communication needs became attainable. In this context, VoIP technology can provide real-time speech communications between users connected by an IP network, public or private, in such a way that closely resembles a face-to-face conversation. (Brady, 2010: 412)

The process involves the delivery of speech frames from one location to another with high quality and low latency. VoIP technology has a signicant impact on the multi-billion dollar telecommunication industry: the promise of less expensive phone calls with comparable quality and better features than PSTNs has accelerated its adoption, both in business and home applications. As the number of households and businesses connecting to the Internet steadily increases around the world, more users utilize the public Internet for their communication needs. Seamless interoperability with existing public switched telephone networks (PSTNs) has been one of the crucial accelerants of VoIP adoption. Furthermore, VoIP's better integration with various forms of collaborative communications, such as instant messaging, desktop sharing, voice-mails, and video calls, has made it a suitable communication solution for today and the future.

Literature Review

We can talk about three parameters that affect multicasting performance: leave latency, host filtering and multicast delivery ...