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Группа _, кафедра _ Volume 5, No. 4, April 2014

Journal of Global Research in Computer Science Wi-Fi Call Authors: Darshan Rathi, Tomy Pallissery , Upendra Bangale, Ranjan Mujumdar, Ms.Monika Y Dangore (Pune, India) Annotation

The use of Wi-Fi enabled cell phones to access internet away from the PC is increasing day-by-day. The use of Wi-Fi enabled phones as IP phones, and their communication within a local wireless LAN is discussed in this paper. This proposed model is a form of telecommunication that allows data and voice transmissions to be sent within a specific range of interconnected networks. The models, which are Wi-Fi enabled, can be used to communicate with each other through the Wi-Fi communication channel. Each mobile device connects to a device which hosts the Server which is a part of the network and identifies itself in the routing table. Our proposal allows free calls within the network with high quality voice transmission. This model will be a prototype of itinerant devices communicating through in the Wi-Fi bandwidth and will greatly reduce the communication cost in large organizations.

Key words: IP phone, VoIP, Android, UMA, GSM, Wi-Fi, Router Аннотация

Использование сотовых телефонов с поддержкой Wi-Fi для доступа в Интернет вдали от ПК растет изо дня в день. В этой статье обсуждается использование телефонов с поддержкой Wi-Fi в качестве IP-телефонов и их связь в пределах локальной беспроводной сети. Эта предложенная модель является формой телекоммуникации, которая позволяет передавать данные и голосовые сообщения в пределах определенного диапазона взаимосвязанных сетей. Модели, поддерживающие Wi-Fi, могут использоваться для связи друг с другом по каналу связи Wi-Fi. Каждое мобильное устройство подключается к устройству, на котором размещён сервер, являющийся частью сети, и идентифицирует себя в таблице маршрутизации. Наше предложение позволяет бесплатно звонить внутри сети с высоким качеством передачи голоса. Эта модель будет прототипом передвижных устройств, которые будут взаимодействовать в ширине полосы Wi-Fi и значительно сократят расходы на связь в крупных организациях.

Ключевые слова: IP-телефон, VoIP, Android, UMA, GSM, Wi-Fi, Маршрутизатор Glossary

Service provider - is a business that supplies expert care or specialized services rather than an actual product. The term is usually saved for companies related to communication or technology, such as mobile phone companies or Internet service providers. For example, a company that provides access to a telecommunications network or the Internet (ISP).

Android - is a mobile operating system developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets.

GSM - Global System (or Standard) for Mobile, a standardized international system for digital mobile telecommunication.

IP-address (The Internet Protocol Address) - is a unique address that computing devices such as personal computers, tablets, and smartphones use to identify itself and communicate with other devices in the IP network.

IP phones - phones with logical IP address.

VoIP (Voice over IP) is a communication system that provides voice transmission over the Internet or any other IP network.

LAN (local area network) - is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building and has its network equipment and interconnects locally managed. Ethernet and Wi-Fi are the two most common transmission technologies in use for local area networks.

Ethernet – is a family of packet data transmission technologies for computer networks.

Wi-Fi («Wireless Fidelity») - is a technology for wireless local area networking with devices based on the IEEE 802.11 standards. Under the abbreviation Wi-Fi, a whole family of standards for the transmission of digital data streams via radio channels is currently under development.

Router - is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. A data packet is typically forwarded from one router to another router through the networks that constitute the internetwork until it reaches its destination node. Located at the junction of the two networks, the router usually has a WAN port for connecting to an external network and several LAN ports, which include computers of the internal local network.

Routing table (or routing information base (RIB)) - is a data table stored in a router or a networked computer that lists the routes to particular network destinations, and in some cases, metrics (distances) associated with those routes.

Bandwidth (in computing) - is the bit-rate of available or consumed information capacity expressed typically in metric multiples of bits per second. However, the actual bit rate that can be achieved depends not only on the signal

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