3g Digital Networks Essay

1017 words - 5 pages

Christon Dookie
3G Digital Networks
Kaplan University

IT284: Introduction to Mobile System
Professor Rhonda Chicone
February 12, 2013

WCDMA stands for Wideband Code Division Multiple Access. It is one of the main systems used for third generation, or 3G, mobile communication networks. The term is often used interchangeably with UMTS, which stands for Universal Mobile Telecommunications Systems. Technically WCDMA is merely one example of UMTS technology. The most prominent use of WCDMA is in Japan where the country's largest mobile phone operator, NTT DoCoMo uses the technology. It was DoCoMo which originally developed WCDMA. The firm then successfully lobbied for it to be accepted ...view middle of the document...

This avoids the transmitter receiving signals which are excessively strong or weak, which could limit the transmitter's efficiency. Another benefit is that WCDMA can cope particularly well when there are many devices in one area. This makes it particularly suitable for densely populated areas such as some major Asian cities. The system is also well suited to the technical requirements presented by video calls. The main disadvantages of WCDMA are that it is not used throughout the entire world, which limits take up of compatible handsets among people who travel internationally, and that it is a relatively complex system which can be expensive to introduce into a new market
GSM Gateway is a mobile phone device that’s takes a single SIM card or multiple SIMS and provides a telecoms interface either Analogue (FXO/FXS) to allow connection to Analogue trunk of a Telephone System (or to allow a standard telephone to connect directly), ISDN Interfaces such as ISDN2e and ISDN30 for connection to ISDN telephone systems and VOIP interfaces to allow the gateway to connect to a Voice Over IP network. The GSM Gateway enables these traditional telephony devices to connect directly to the mobile phone network, usually providing the user with access to cheaper call rates. I-mode Proprietary packet based information service for mobile phones. I-mode delivers information such as mobile banking, and train timetable to mobile phones and enables exchange of email from handsets on the network.
EDGE takes GSM even further. GSM, which stands for Global System for Mobile communications, reigns as the world’s most widely used cell phone technology. EDGE, which stands for Enhanced Data rates for GSM Evolution, is a faster version of GSM. EDGE is a high speed 3G technology that was built upon the GSM standard. EDGE networks are designed to deliver multimedia applications such as streaming television, audio and video to mobile phones at speeds up to 384 Kbps. Such speeds still pale in comparison, though, to standard DSL and high-speed cable access today. EDGE delivers a boost of more than three times the capacity...

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