In the same second generation, we also have the fixed wireless local loops in a recent to the mobile telephony and the intelligent networking capabilities just started emerging. We split the cells and we had the microcellular and picocellular systems, which could increase the capacity and the quality. The various local area networks also developed during that time, and we had the advanced enhanced cordless telephony and technology. This is the second generation, where we have the most important and most popular system as the GSM, developed by European Community. Similarly we have American digital system and the Japanese digital system, and that is now.
In the year 2000 onwards we expect to have the third generation of systems, where the high quality audio and data have been integrated, and we have narrowband and broadband multimedia services with the intelligent networking integration. The broader bandwidth has been taken. The radio transmission has been made more efficient and the local area as well as the wide area networking capabilities have been included. This spectrum is raised from the earlier 800-900 MHz band to 1.800-2.000 MHz band and this spectrum utilising efficiency has been improved. The network management has been integrated in the third system and you have the CDMA capabilities could division multiple access capabilities in reason to the time divisible access in the third generation of systems.
The forth generation expected to be in 2010 or maybe even earlier will have telepresencing, education training and dynamic information access, wireline and broadband transparency. Whatever we have in the wireline should be available in the wireless mobile systems as well. And the knowledge based network operations will take place improving the system performance and flexibility tremendously and this will be unified service network.
