A study of Interoperability between 3G Systems to GSM

摘要

71% of the world‘s digital mobile communication subscribers use GSM. Almost all these mobile communication subscribers are using GSM but incorrectly many of these are considering that GSM systems are approaching to its end due to the advent of 3G as it is to be voice centric with low performing data capabilities. This article copes with the interoperability between 3G systems, GSM and the original GSM. Evolution of mobile telephone system, definition of GSM and GSM frequency bands are also discussed. This article also presents an overall view on an interworking architecture and represent the introduction of new ?3G‘ technologies in GSM i.e., alignment with UMTS-The IU interface, the IP multimedia subsystem, the new flexible layer one, future radio issues, multimedia broadcast and multicast to prove GSM is a ?3G‘ system in its own right