The walkie talkie application

Abstract

As Voice-over IP (VoIP) services are dominating the telephony backbone already, the main focus of this project is to investigate the possibility of using VoIP over the last hop between the home IP router and the mobile phone. Most homes are already equipped with fixed IP communication lines, and many network providers plan to use VoIP to the IP router at the homes. The project investigates the possibility to use VoIP between the mobile phone, hosting the personal information, and the home router. As a first result a Walkie-Talkie has been developed allowing Push-to-Talk services in a Peerto-Peer manner called the Direct Link scenario as shown in Figure 12.1. © 2007 Springer.