Thesis Abstract

Abstract
Wireless Voice over Internet Protocol (VoIP) has emerged as a significant technology in the field of telecommunications, offering a cost-effective and efficient alternative to traditional voice communication systems. This research project focuses on the design and implementation of a wireless VoIP system that aims to provide high-quality voice communication over wireless networks. The project involves the integration of various technologies including wireless communication protocols, voice encoding and decoding algorithms, network infrastructure, and user interface design. The primary objective is to develop a system that can deliver voice communication services over wireless networks with minimal latency, high audio quality, and reliable connectivity. The implementation of the wireless VoIP system involves several key components. Firstly, the system utilizes wireless communication protocols such as Wi-Fi or cellular networks to establish a connection between the user's device and the VoIP server. Voice data is then encoded using compression algorithms to reduce bandwidth requirements and ensure efficient transmission over the wireless network. The VoIP server plays a crucial role in the system by managing the voice data packets, routing calls, and facilitating communication between users. Quality of Service (QoS) mechanisms are implemented to prioritize voice traffic and ensure a consistent audio quality during calls. The server also handles tasks such as call setup, signaling, and user authentication to provide a seamless user experience. User interface design is another critical aspect of the wireless VoIP system, aiming to provide an intuitive and user-friendly interface for making calls, managing contacts, and accessing additional features such as voicemail and call forwarding. The interface should be optimized for mobile devices to accommodate the increasing trend of mobile VoIP usage. Overall, the design and implementation of a wireless VoIP system require a comprehensive understanding of wireless communication technologies, voice encoding algorithms, network protocols, and user interface design principles. By combining these elements effectively, the system can offer a reliable and efficient voice communication solution over wireless networks. In conclusion, this research project aims to contribute to the advancement of wireless VoIP technology by designing and implementing a system that delivers high-quality voice communication services over wireless networks. The system's performance will be evaluated based on criteria such as call quality, latency, reliability, and user satisfaction to assess its effectiveness and potential for real-world applications.

Thesis Overview

1.0     INTRODUCTION

Voice over internet protocol (Voice Over/P, Vo/P) is a family of technologies, methodologies, communication protocols, and transmission techniques for the delivery of voice communications multimedia sessions over internet protocol (IP) networks, such as the internet. Other terms frequently encountered and often used synonymously with Vo/P are (P telephony. Internet telephony, Voice over broad band (VOBB), broadband telephony, and broadband phone.

Content telephone refers to communication services-voice, fax SMS and/or voice-messaging application That are transported via the internet, rather than the public switched telephone network (PSTN). The steps involved in originating a VoIP telephone call are signiating and media channel setup, digitization of the analogy voice signal, encoding packitization, and transmission as internet protocol (IP) packet over a packetswitched network on the receiving side, similar steps (usually in the reverse order such as reception of the IP packets, decoding of the packets and digital-to-analog conversion reproduce the original voice stream. Even through IP Telephony and VOIP are terms that are used interchangeable, they are actually different IP telephone has to do with digital telephony system that use IP protocol for voice communication while VoIP is actually a subset of IP Telephony. VoIP is a technology used by IP Telephony as a means of transporting phone calls.

VoIP systems employ session control protocols to control the setup and tear down of calls as well as audio codes which encode speech allowing transmission over an IP network as  digital audio via an audio stream. The codecs used is varied between different implementations of VoIP (and often a range of codecs are used). Some implementation rely on narrowband and compressed speech, which others support high fidelity stereo codecs.

VoIP is available on many smartphones and internet devices so event the users of portable devices that are not phones can still make calls or send SMS text messages over 3G or Wi-Fi.

VOWLAN (Voice Over Wireless LAN) is the use of a wireless broadband network according to the IEEE 802.11 standards for the purpose of vocal conversation. In essence, its VoIP over a Wi-Fi network. In most cases the Wi-Fi network and voice components supporting the voice system are privately owned.

VOWLAN can be conducted over any internet accessible device, including a laptop. PDA or the new VOWLAN units which look and function like DECT and cell phones. Just like for IP-DECT, the VOWLAN’S main advantages to consumers are cheaper local and international calls, free calls to other VOWLAN units and a simplified intergrated billing of both phone and internet service providers.

Although, VOWLAN and 3G have certain feature similarities, VOWLAN is different in the sense that it uses a wireless internet network (typically 802.11) rather than a cellular. Both VOWLAN and 3G are used in different ways, although with a femtocel the two can deliver similar service to users and can be considered alternatives.