A cellular phone is a kind of wireless communication. It is called as a cellular phone as in this type of communication there are many base stations into which a service area is split up. These base stations form multiple cells of the service area. The cellular calls are transferred from one base station to another base station when the user moves from one cell to another cell.
The idea of a cellular phone started in the year 1947 from mobile car phones. Many researchers wondered if they could reuse the frequency available in the small cells of a specific service area and thus increase the capacity of the mobile phones in the area. It was actually more of a two way radio but the technological advance of the time was not sufficient. During that year the AT&T asked the Federal Communications Commission to grant some more radio spectrum frequencies for use in mobile phone services. The lesser number of frequencies available lead to only about 23 phone conversations that were possible in a specific service area at a time.
The first portable handset, it is said, was created by Dr.Martin Cooper who was the general manager of Motorola. It was Motorola who used the police car technology for the mobile phones. Bell Labs and AT&T set up the cellular system consisting of 200 base users in the year 1977. This kind of cellular phone system started on a wide scale in 1979 in Tokyo. In the year 1981 American Radio Telephone and Motorola began the cellular radio telephone and in the next year Ameritech started the Advanced Mobile Phone Service (AMPS) in Chicago.
This kind of cellular service really caught on commercially about 37 years later and in 1987 there were more than a million subscribers making the airways congested. This was the time to increase the service by means of splitting the existing cells, allocating a higher number of frequencies or alternatively by upgrading of the technology.
The FCC was not in favor of splitting the existing cells which would lead to a lot of expenditure and giving more bandwidth was also out of the question. They however supported innovations in technology by letting the cellular organizations that had licenses to use newer technology in the 800 MHz bandwidth.
The idea of a cellular phone started in the year 1947 from mobile car phones. Many researchers wondered if they could reuse the frequency available in the small cells of a specific service area and thus increase the capacity of the mobile phones in the area. It was actually more of a two way radio but the technological advance of the time was not sufficient. During that year the AT&T asked the Federal Communications Commission to grant some more radio spectrum frequencies for use in mobile phone services. The lesser number of frequencies available lead to only about 23 phone conversations that were possible in a specific service area at a time.
The first portable handset, it is said, was created by Dr.Martin Cooper who was the general manager of Motorola. It was Motorola who used the police car technology for the mobile phones. Bell Labs and AT&T set up the cellular system consisting of 200 base users in the year 1977. This kind of cellular phone system started on a wide scale in 1979 in Tokyo. In the year 1981 American Radio Telephone and Motorola began the cellular radio telephone and in the next year Ameritech started the Advanced Mobile Phone Service (AMPS) in Chicago.
This kind of cellular service really caught on commercially about 37 years later and in 1987 there were more than a million subscribers making the airways congested. This was the time to increase the service by means of splitting the existing cells, allocating a higher number of frequencies or alternatively by upgrading of the technology.
The FCC was not in favor of splitting the existing cells which would lead to a lot of expenditure and giving more bandwidth was also out of the question. They however supported innovations in technology by letting the cellular organizations that had licenses to use newer technology in the 800 MHz bandwidth.
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