30-11-2017, 12:48 PM
Guest
30-11-2017, 12:49 PM
[b]cellular and mobile communication by bakshi free download[/b]
01-12-2017, 09:28 AM
A cellular network or mobile network is a communication network where the last link is wireless. The network is distributed in terrestrial areas called cells, each of which has at least one transceiver of fixed location, but more usually with three cellular stations or base transceiver stations. These base stations provide the cell with network coverage that can be used for voice, data and other transmission. Normally, a cell uses a different set of frequencies from neighboring cells, to avoid interference and to provide guaranteed quality of service within each cell.
When joined these cells provide radio coverage over a wide geographical area. This allows a large number of portable transceivers (for example, mobile phones, tablets and laptops equipped with mobile broadband modems, pagers, etc.) to communicate with each other and with fixed transceivers and telephones anywhere in the network, to through base stations, even if some of the transceivers move through more than one cell during transmission.