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Cell Phone Communication Protocols (PDF)

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					ECE317
Hiral Patel, Michael Bell, Lucian Tira, Bogdan Tira

                       Cell Phone Communication Protocols

        Since the development of the mobile phone, the industry has been trying to improve

the talk time, quality and features of communcation between these portable devices. Part of

this development has been done in terms of protocols, the set of standards that these phones

must support in order to be able to communicate with each other.

        The development of 0G in the 1970’s sparked a need for increased data quality and

‘handover’ procedures from one cell phone tower to another, in order for mobile phones to

truly be mobile. 1G Technology brought along variable cell sizes, which meant better

service in urban areas, as well as full-duplex transmition, allowing for simultaneous receiving

and transmition of voice, which previous generation of mobile phone communication did not

always allow. In the early 1990’s 2G was introduced and some of the security concerns

regarding 1G were addressed. For example, with 1G, anyone with a radio scanner could turn

to the right frequency to listen in on other people’s conversation. 2G requires subscriber

authentication and allows encryption between the subscriber and the base station.

        3G services were first offered in Japan and Korea at the end of 2001. One of the

main features of 3G is the increased number of subscribers, as well as increased data transfer

rates through a better usage of the radio spectrum. Most cell phone markets are in the

process of upgrading to 3G.

        During our presentation we will be explaining in more detail the difference between

these protocols, the signal processing differences between the protocols and what they mean

for cell phones, carrier companies and end users. We will further show that there are a

plethora of different other protocols that refer to more specific voice or data transfer

situations.

				
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posted:11/20/2011
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