In this article I am going to give a brief intro of G family , i.e 0G 1G 2G 3G , how they work and later economics related with 3G auction in india.
0G
The 0G or early mobile telephone systems can be distinguished from earlier closed radiotelephone systems in that they were available as a commercial service that was part of the public switched telephone network, with their own telephone numbers,rather than part of a closed network such as a police radio or taxi dispatch system.
These mobile telephones were usually mounted in cars or trucks, though briefcase models were also made. Typically, the transceiver (transmitter-receiver) was mounted in the vehicle trunk and attached to the "head" (dial, display, and handset) mounted near the driver seat.
IMTS AND RCC were the technlogy which were used. In public switched network, suppose two caller wants to talk , then the operator of respective caller will secure a common line and let them talk , and till these users don't end their talk the line will remain busy.
1G
1G (or 1-G) refers to the first-generation of wireless telephone technology, mobile telecommunications. These are the analog telecommunications standards that were introduced in the 1980s.
The main difference between two succeeding mobile telephone systems, 1G and 2G, is that the radio signals that 1G networks use are analog, while 2G networks are digital.Although both systems use digital signaling to connect any two radio towers (which listen to the handsets),but to the rest of the telephone system, the voice itself during a call is encoded to digital signals in 2G whereas 1G is only modulated to higher frequency, typically 150MHz and up.
technologies used AMPS,NMT,RTMI and TACS
2G
Started in 1991 , it has three primary benefits over their predecessors ,that phone conversations were digitally encrypted, 2G systems were significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS text messages.
2G technologies can be divided into TDMA-based and CDMA-based standards. GSM is TDMA based, therefore we generally hears only about cdma and gsm phones.Also a third technolgy is FDMA which is generally used in combination with these
0G 1G AND 2G ALL WERE CIRCUIT SWITCH NETWORKS
TERMS TO GET CLEAR
1 CIRCUIT SWITCHING AND PACKET SWITCHING
In packet switching , the users data is grouped into packets of definite sizes generally in bytes . it is these packets which have to be switched between users ,whereas in circuit a definite route or resource or path is held by users ,and these are switched. we can take a example of trains to understand it . Suppose there are three parallel tracks , in case of CS the train will run over them ,so only three users can be connected at a time , whereas in PS ,the coaches of train are considered as packets , so more users can connect at a time ,as each train has number of coaches which are reserved by users
2 CDMA TDMA FDMA
FDMA stands for frequency division multiple access , we know that mobile works within a given spectrum ,which is range of frequency ,in FDMA it is divided b/w users , like a highway is divided into lans , but here on a lan one user at a time
TDMA stands for time division multiple access , it can be best understood by considering the that on the lans described in FDMA , we are setting a time interval of users that is from morning 9 to 11 mr sharma on lan 1 , from 11 to 12 mr bhaskar on lan 1 . but as you can see even now road is not fully utilise and idle times are present in between
CDMA stands for code division multiple access , it is little bit difficult to understand as in it we have to consider that the lan sizes can change with the car being use i e code , so what hapens is that depending whether a cycle is coming or truck is coming we can change lan size , that this is also what happens on roads , but like roads the fear of losing packets or accidents increases with increase in number of users
0G
The 0G or early mobile telephone systems can be distinguished from earlier closed radiotelephone systems in that they were available as a commercial service that was part of the public switched telephone network, with their own telephone numbers,rather than part of a closed network such as a police radio or taxi dispatch system.
These mobile telephones were usually mounted in cars or trucks, though briefcase models were also made. Typically, the transceiver (transmitter-receiver) was mounted in the vehicle trunk and attached to the "head" (dial, display, and handset) mounted near the driver seat.
IMTS AND RCC were the technlogy which were used. In public switched network, suppose two caller wants to talk , then the operator of respective caller will secure a common line and let them talk , and till these users don't end their talk the line will remain busy.
1G
1G (or 1-G) refers to the first-generation of wireless telephone technology, mobile telecommunications. These are the analog telecommunications standards that were introduced in the 1980s.
The main difference between two succeeding mobile telephone systems, 1G and 2G, is that the radio signals that 1G networks use are analog, while 2G networks are digital.Although both systems use digital signaling to connect any two radio towers (which listen to the handsets),but to the rest of the telephone system, the voice itself during a call is encoded to digital signals in 2G whereas 1G is only modulated to higher frequency, typically 150MHz and up.
technologies used AMPS,NMT,RTMI and TACS
2G
Started in 1991 , it has three primary benefits over their predecessors ,that phone conversations were digitally encrypted, 2G systems were significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS text messages.
2G technologies can be divided into TDMA-based and CDMA-based standards. GSM is TDMA based, therefore we generally hears only about cdma and gsm phones.Also a third technolgy is FDMA which is generally used in combination with these
0G 1G AND 2G ALL WERE CIRCUIT SWITCH NETWORKS
TERMS TO GET CLEAR
1 CIRCUIT SWITCHING AND PACKET SWITCHING
In packet switching , the users data is grouped into packets of definite sizes generally in bytes . it is these packets which have to be switched between users ,whereas in circuit a definite route or resource or path is held by users ,and these are switched. we can take a example of trains to understand it . Suppose there are three parallel tracks , in case of CS the train will run over them ,so only three users can be connected at a time , whereas in PS ,the coaches of train are considered as packets , so more users can connect at a time ,as each train has number of coaches which are reserved by users
2 CDMA TDMA FDMA
FDMA stands for frequency division multiple access , we know that mobile works within a given spectrum ,which is range of frequency ,in FDMA it is divided b/w users , like a highway is divided into lans , but here on a lan one user at a time
TDMA stands for time division multiple access , it can be best understood by considering the that on the lans described in FDMA , we are setting a time interval of users that is from morning 9 to 11 mr sharma on lan 1 , from 11 to 12 mr bhaskar on lan 1 . but as you can see even now road is not fully utilise and idle times are present in between
CDMA stands for code division multiple access , it is little bit difficult to understand as in it we have to consider that the lan sizes can change with the car being use i e code , so what hapens is that depending whether a cycle is coming or truck is coming we can change lan size , that this is also what happens on roads , but like roads the fear of losing packets or accidents increases with increase in number of users
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