Cellular network

Июль 22, 2022

Содержание

2. A cellular network or mobile network is a communication network where the last link is wireless
3. The network is distributed over land areas called cells, each served by at least one fixed-location
4. Cellular networks offer a number of desirable features: More capacity than a single large transmitter, since
5. Cell signal encoding time division multiple access (TDMA) frequency division multiple access (FDMA) code division multiple
6. Mobile phone network The most common example of a cellular network is a mobile phone (cell
7. Structure of the mobile phone cellular network A network of radio base stations forming the base
8. Cellular frequency choice in mobile phone networks Low frequencies, such as 450 MHz NMT, serve very
9. Mobile phone services Voice call; The answering machine in mobile (service); Roaming; Caller ID (Caller Line
10. Cellular Communication in Kazakhstan Beeline Tele2 Kcell Altell
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A cellular network or mobile network is a communication network where

the last link is wireless

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The network is distributed over land areas called cells, each served

by at least one fixed-location transceiver, known as a cell site or base station
Cellular telephone frequency reuse pattern

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Cellular networks offer a number of desirable features:
More capacity than a

single large transmitter, since the same frequency can be used for multiple links as long as they are in different cells
Mobile devices use less power than with a single transmitter or satellite since the cell towers are closer
Larger coverage area than a single terrestrial transmitter, since additional cell towers can be added indefinitely and are not limited by the horizon

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Cell signal encoding
time division multiple access (TDMA)
frequency division multiple

access (FDMA)
code division multiple access (CDMA)
orthogonal frequency division multiple access (OFDMA) were developed

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Mobile phone network
The most common example of a cellular network is

a mobile phone (cell phone) network
GSM network architecture

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Structure of the mobile phone cellular network
A network of radio base

stations forming the base station subsystem.
The core circuit switched network for handling voice calls and text
A packet switched network for handling mobile data
The public switched telephone network to connect subscribers to the wider telephony network

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Cellular frequency choice in mobile phone networks
Low frequencies, such as 450

MHz NMT, serve very well for countryside coverage. GSM 900 (900 MHz) is a suitable solution for light urban coverage. GSM 1800 (1.8 GHz) starts to be limited by structural walls. UMTS, at 2.1 GHz is quite similar in coverage to GSM 1800.

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Mobile phone services
Voice call;
The answering machine in mobile (service);
Roaming;
Caller ID (Caller

Line Identification) and AntiAON;
Reception and transmission of short text messages (SMS);
Receiving and sending multimedia messages - images, music, video (MMS-service);
Access to the Internet;
Video call and video conferencing
Determination of mobile phone location (Location-based service

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