Base concept of selullar technology

Base concept of selullar technology

after know about cellular technology development in previous post, so in this posting explain about concept base of celuler technology at begun with cellular definition.

cellular system is sophisticated because this system divide a area in a few little cell. this be used to ascertain that frequency can spread until that achieve to all parts in certain area so that several users can use their mobile phone simultaneously without rest and without falter.

in system cellular, to describe scope area geographically used depiction heksagonal, this area called cell. And in this system use three heksagonal. So, why use heksagonal not circle to describe a cell? Okey to answer question, please see the online



                                                                      

if you describe a cell in circle, so cell one with another will not mutual continual finely. in cellular system, all regions be included without existence gap cell one with other so that curve heksagonal more represent, because scope area can be depicted with rapih with include overall area. to be more detail you can see in online,



                                                                    

where a antenna send and receive signal in three different regions, where every cell only covered just part from third cell covered. several shaper important components system from cellular itself cellular device likes Base Station Radio, Antenna and Base Station Controller will regulate traffic from several cells and will connected with public telephone network

Cellular Technology Development

telecommunication technology development is begun amps ((Advance Mobile Phone System), GSM (Global System for Mobile), and CDMA (Code Division Multiple Access)

AMPS (Advance Mobile Phone System)
Amps be first generation in cellular technology.This system at allocation in band 800 Mhz. This network uses integrated circuit very big that consist of computer dedicated and system switch. Amps use range frequency between 824 mhz - 894 mhz that used in analog mobile phone. Amps only at operate in band 800 mhz and doesn't offered fitur other used occasionally in cellular service likes e-mail and browsing at web. Amps use range frequency between 824 mhz - 894 mhz that used

GSM (Global System for Mobile telekomunication)
GSM be second generation after AMPS, GSM first time taked in the year 1991 and begin to bloom in the year 1993 with adopted by several countries likes africa south, australian, mid-east, and north america.
Gsm first time prepared to be system telecommunication moves that has international scope based on in technology multyplexing time division multiple access (TDMA). GSM has frequency 900 mhz besides gsm also will use frequency 1800 mhz by the name of personal communication network. GSM also will prepare service to will send data with high-speed that use technology high speed circuit switch data (HSCSD) that can to send data until 64 kbps up to 100 kbps.

CDMA (Code Division Multiple Access)

Cdma will be third generation (3G). telephone technology without cable very be feeled the development, with cellular telephone kind assorted appearance. this time that is blooming telephone without cable that use code devision multiple access that use distribution technique spectrum. will differ from global method system for mobile communication (GSM) that uses time division multiplexing (TDM), CDMA doesn't give sign in special frequency in every user. every channel will use spectrum available fully. individual conversation at encode or at will encode with digital arrangement according to pseudo random. cdma will be development amps time first at will use by united america military as communication intelejen when does war. development cdma not as soon as development gsm many adopted by a large part operator at assorted country.