Overview
The GSM system utilises new technologies efficiently. A collection of innovative technological features demonstrates the engineering force behind the system. The use of certain technological features is motivated by the benefit that is offered. The variety of the level of technologies is wide; from small details hidden deep in the system to revolutionary new concepts at the top level of the system, visible to all users.
The world is becoming digitalised. Analogue systems in many fields of technology are being replaced by a modern digital alternative. One of the main improvements when compared to the first generation cellular systems is that GSM is a digital system. We shall take a closer look in this module what it means that the system is digital, and what benefits it offers.
A key feature in any cellular mobile network is that several users can communicate without disturbing each other. As a matter of fact, the frequency band that is allocated for mobile communications is always limited and a lot of effort is spent to develop systems that can serve as many users as possible in a given band. GSM uses a combination of two distinct methods to achieve these tight requirements.
Digitalisation
GSM is a digital system. Let's take a closer look at what it means, if a signal is analogue or digital.
An analogue signal means in principle, that the signal can have any values at any time. A good example is a traditional thermometer outside your window. The range of the meter is typically from -40 Celsius to +40 Celsius and the reading can be anything between these values. In theory, if we had eyesight well enough, we could distinguish arbitrary small differences in the temperature. If the reading of the thermometer were converted to an electrical form, such as voltage, we would have an analogue signal.
In a mobile communications network, part of the transmission connection uses a radio link and another part uses 2Mbit/s PCM links. Radio transmission is used between the Mobile Station (MS) and the Base Transceiver Station (BTS) and the information must be adapted to be carried over 2Mbit/s PCM transmission links throughout the remainder of the network.
In a mobile communications network, part of the transmission connection uses a radio link and another part uses 2Mbit/s PCM links. Radio transmission is used between the Mobile Station (MS) and the Base Transceiver Station (BTS) and the information must be adapted to be carried over 2Mbit/s PCM transmission links throughout the remainder of the network.
COMP09022 Network Design BSc COMPUTER NETWORKING COMP09022 ICMPv6 Prepared by B00270675 13-03- 2015 WORD COUNT (0000) TABLE OF CONTENTS TITLE PAGE……………………………………………... 1 TABLE OF CONTENTS………………………………….. 2 INTRODUCTION TO THE REPORT……………………. 3 TABLE OF FEATURES.......................................................4
In 1990s, ground-based wireless phone service grew rapidly around the world. A key factor in the growth of wireless phones was the adoption of a single standard, known as GSM, in Europe and parts of Asia. There were 480 million cellular subscribers worldwide by January 2000 and it reached more than billions before 2005. The economy of scale that introduced will provide the extent of competitive pressure in the business environment. It helps to stimulate Iridium to consider price-performance tradeoff that offered by the substitutes and the need of product differentiation alternatives in advance.
Cellular phones carry a diverse group of users. In June 1985, there were about 203,000 cellular phone service subscribers. By June 1989, the number had exploded to 2.7 million subscribers, and by June 1995 there were mire than 26 million subscribers. When cell phones were first introduce, only people with a lot of money had them and the service was very expensive. It was a lot cheaper to stop and use the pay phone than it was to use a cell phone. Now, it is almost as cheap to use a cell phone to make a long distance call as it is to make a long distance call using AT&T.
Analysis of the Environment of the Mobile Network System Executive Summary 3 Glossary of Abbreviations 4 Introduction 5 Recent History
Telecommunications gained mainstream attention in the early 90’s; however the initial key market was business men and women, who used their phones whilst being on the move and so allowing them to communicate with their companies with ease. Though in the modern era, telecommunication went through segmentation in the market trends, and now in this day and age it would be difficult to find someone who does not own some form of mobile technology. Many phone providers battle to provide the best service for their customers (Figure 1).
The uses of Digital Signal Processing in communications has become so large scale that nearly any form of analog communication is considered obsolete. Today, nearly any form of communication used, aside from verbal communication, relates to Digital Signal Processing. Some of the more prominent uses for DSP in communications are; local area networks, cell pho...
The digital signal is different from the analog waveform by having a series of discrete pluses which represent one and zero bits.
Cell phone manufacturers and service providers are at the core of the cell phone industry. These corporations are integral from their research and development endeavors to interactions with the consumer and the marketing of new products. The companies that control such factors of cellular phones are very numerous, so it is difficult to address all the cell phone manufacturers and service providers. However, we have focused largely on only the most significant cellular companies namely in the U.S. marketplace, although many have global ties. Collectively, companies around the world have the same goals in mind – to create desirable cutting-edge technology and to increase consumer satisfaction with hopes of generating sales, and thus profits.
Analog communication employs continuous transmission of an electromagnetic wave form that varies in frequency and amplitude.
Digital signals convert regular signals into strings of ones and zeros, which is much more efficient than analog signals. Broadcasters can maximize their use of channel space because digital signals carry significantly more information than analog signals. Several digital programs and services can be sent in the space occupied by a single analog channel. The result of this is that the consumer is provided with more channel choices(FCC).
In the 1980s, first generation (1G) cell phones consisted of voice-only analog devices with limited range and features that were sold mainly in North America. In the 1990s, second generation (2G) devices consisted of voice/data digital cell phones with higher data transfer rates, expanded range, and more features. Sales of these devices expanded to Europe and Asia. In the twenty-first century, Nokia and other companies are combining several digital technologies into third generation (3G) communication devices that reach globally and feature the convergence of the cell phone, personal digital assistant (PDA), Internet services, and multimedia applications.
Print. The. Gordon A. Gow, and Richard K. Smith. Mobile and wireless communications: an introduction, McGraw-Hill International, 2006. Print.
G in 1G, 2G, 3G and 4G stands for the “Generation” of the mobile network. Today, mobile operators have started offering 4G services a higher number before the ‘G’ means more power to send out and receive more information and therefore the ability to achieve a higher efficiency through the wireless network. During the time of 1G, radio signals were transmitted in ‘analogue’ form. 2G networks, on the other hand, are based on narrow band digital networks. The 3rd generation of mobile networks has become popular and users access the Internet over devices like mobiles and tablets.
frequency carrier while the user is moving within a telephone service area. In addition to telephony, modern mobile phones support a variety of other services, such as text messaging, email, Internet access, short-range wireless communications, business applications, gaming, and photography. Cell Phones which offer these and more general computing capabilities are referred to as smartphones. Cell Phones are now a way of life in the generation we live in and call home today, and cell phones have changed and benefited our world. By means of texting , making calls, gaming applications, saving people’s lives , helping people while
Most networks have coverage checker so I can check the mobile phone coverage in my area. All I have to do is enter the postal code to see the coverage I can expect. I can get information on the regular 2G coverage for calls and texts as well as 3G coverage. It is also a good idea to ask people in the area if they find the signal strength adequate. The mobile signal strength depends on the provider and where you are. If you want to upgrade to browse the internet or download music videos, you need to make sure there is a strong 3G signal in the area.