Search Info On BlackBerries
By Dick Edwardson
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.
It was actually the mobile car phones that were the beginning of the modern cellular phones. Researchers tried to reuse the frequency available in the cells of a particular service area and though this would help to enhance the capacity of the phones. Though the mobile phone was just a two way radio communication, the technology of the day did not suffice to bring this into effect. AT&T then asked the Federal Communications Commission if they could provide more radio spectrum frequencies for cellular phone services. However, as there were very few frequencies allotted, only 23 phone conversations was possible at a time in that service area.
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.
Thirty seven years later the cellular phones became commercially viable and in 1987 the airways became really crowded with one million subscribers for the cellular phone in the country. Now it was possible to increase the service either by a greater allocation of frequency or by dividing the cells. Another alternative was to go for a newer 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.
It was actually the mobile car phones that were the beginning of the modern cellular phones. Researchers tried to reuse the frequency available in the cells of a particular service area and though this would help to enhance the capacity of the phones. Though the mobile phone was just a two way radio communication, the technology of the day did not suffice to bring this into effect. AT&T then asked the Federal Communications Commission if they could provide more radio spectrum frequencies for cellular phone services. However, as there were very few frequencies allotted, only 23 phone conversations was possible at a time in that service area.
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.
Thirty seven years later the cellular phones became commercially viable and in 1987 the airways became really crowded with one million subscribers for the cellular phone in the country. Now it was possible to increase the service either by a greater allocation of frequency or by dividing the cells. Another alternative was to go for a newer 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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