15-06-2012, 05:21 PM
Cellular Communication Technologies
Cellular Communication.doc (Size: 1.97 MB / Downloads: 80)
Abstract
Today’s work force is demanding mobility, flexibility and real-time access to critical data. Over recent years, the trend towards the smaller and faster device, coupled with the need for information access on the move, has paved the way for a new technology of the Mobile Communications. Mobility is the ability to access information and services anywhere anytime anyhow. On the telecom front, numerous wireless technologies have been introduced in the country. It started with Global System Mobile telecommunications (GSM) based mobile phones, and today we can see General Packet Radio Service (GPRS) technologies being implemented as well.
Introduction
The success of any technology largely depends upon its widespread usage, which in turn depends upon the number of applications that can be made from it. A cellular mobile communication system uses a large number of low-power wireless transmitters to create cells – the basic geographic service area of a wireless communication system. Variable power levels allow cells to be sized according to the subscriber density and demand within a particular region. As mobile users travel from cell to cell, their conversations are “handed off” between cells in order to maintain seamless service.
Mobile Communication Principles
Each mobile uses a separate, temporary radio channel to talk to the cell site. The cell site talks to many mobiles at once, using one channel per mobile. Channels use a pair off frequencies for communication –one frequency, the forward link, for transmitting from the cell site and one frequency, the reverse link, for the cell site to receive calls from the users. Radio energy dissipates over distance, so mobiles must stay near the base station to maintain communications. The basic structure of mobile networks includes telephone systems and radio services.
Mobile Telephone System Using The Cellular Concept
Inference problems caused by mobile units using the same channel in adjacent areas proved that all channels could not be reused in every cell. Areas had to be skipped before the same channel could be reused. Even though this affected the efficiency to the original concept, frequency reuse was still a viable solution to the problems of mobile telephony systems.
Cellular System Architecture
Increases in demand and the poor quality of existing service led mobile service providers to research ways to improve the quality of service and to support more users in their systems. Because the amount of frequency spectrum available for mobile cellular use was limited, efficient use of the required frequencies was needed for mobile cellular coverage. In modern cellular telephony, rural and urban regions are divided into areas according to specific provisioning guidelines. Provisioning for each region is planned according to an engineering plan which mainly includes cells, clusters.
GSM Technology
On the telecom front, numerous wireless technologies have been introduced in the country. It started with GSM based mobile phones The developers of GSM choose an unproven digital system and provided 8000 pages of recommendations that had enough flexibility to allow competitive innovation but at the same time ensured proper internetworking between the components of the system. At present there are hundreds of functional GSM networks in an equally large number of countries and the abbreviation now aptly stands for global system for mobile telecommunications.
Cellular Communication.doc (Size: 1.97 MB / Downloads: 80)
Abstract
Today’s work force is demanding mobility, flexibility and real-time access to critical data. Over recent years, the trend towards the smaller and faster device, coupled with the need for information access on the move, has paved the way for a new technology of the Mobile Communications. Mobility is the ability to access information and services anywhere anytime anyhow. On the telecom front, numerous wireless technologies have been introduced in the country. It started with Global System Mobile telecommunications (GSM) based mobile phones, and today we can see General Packet Radio Service (GPRS) technologies being implemented as well.
Introduction
The success of any technology largely depends upon its widespread usage, which in turn depends upon the number of applications that can be made from it. A cellular mobile communication system uses a large number of low-power wireless transmitters to create cells – the basic geographic service area of a wireless communication system. Variable power levels allow cells to be sized according to the subscriber density and demand within a particular region. As mobile users travel from cell to cell, their conversations are “handed off” between cells in order to maintain seamless service.
Mobile Communication Principles
Each mobile uses a separate, temporary radio channel to talk to the cell site. The cell site talks to many mobiles at once, using one channel per mobile. Channels use a pair off frequencies for communication –one frequency, the forward link, for transmitting from the cell site and one frequency, the reverse link, for the cell site to receive calls from the users. Radio energy dissipates over distance, so mobiles must stay near the base station to maintain communications. The basic structure of mobile networks includes telephone systems and radio services.
Mobile Telephone System Using The Cellular Concept
Inference problems caused by mobile units using the same channel in adjacent areas proved that all channels could not be reused in every cell. Areas had to be skipped before the same channel could be reused. Even though this affected the efficiency to the original concept, frequency reuse was still a viable solution to the problems of mobile telephony systems.
Cellular System Architecture
Increases in demand and the poor quality of existing service led mobile service providers to research ways to improve the quality of service and to support more users in their systems. Because the amount of frequency spectrum available for mobile cellular use was limited, efficient use of the required frequencies was needed for mobile cellular coverage. In modern cellular telephony, rural and urban regions are divided into areas according to specific provisioning guidelines. Provisioning for each region is planned according to an engineering plan which mainly includes cells, clusters.
GSM Technology
On the telecom front, numerous wireless technologies have been introduced in the country. It started with GSM based mobile phones The developers of GSM choose an unproven digital system and provided 8000 pages of recommendations that had enough flexibility to allow competitive innovation but at the same time ensured proper internetworking between the components of the system. At present there are hundreds of functional GSM networks in an equally large number of countries and the abbreviation now aptly stands for global system for mobile telecommunications.