Comparison of Generation of Wireless System

p {margin: 0; padding: 0;} .ft00{font-size:18px;font-family:Bookman Old Style,Bold;color:#000000;} .ft01{font-size:18px;font-family:Bookman Old Style;color:#000000;} .ft02{font-size:16px;font-family:Calibri;color:#000000;} .ft03{font-size:18px;line-height:22px;font-family:Bookman Old Style;color:#000000;} Comparison of Generation of Wireless System Mobile telecommunication systems have been evolving for four generations. AMPS is the first generation system; GSM, IS-136, IS-95, and the low tier systems second generation system technologies. These systems have been designed primarily for speech with low-bit-rate data services. They are limited by their vertical architecture. Most system aspects have been specified from services affect the network from end to end. Compared with second-generation systems, third-generation systems offer better system capacity; high-speed, wireless Internet access (up to 2Mbps), and wireless multimedia services, which include audio, video, images, and data. Several technologies such as General Packet Radio Service(GPRS) and EDGE, bridge second generation systems into third generation systems. In third generation systems, new network technologies such as and service creation are integrated into the existing second generation cdma2000 are major third radio standards. The increasing number of Internet and multimedia applications is a major factor driving the third generation wideband wireless technology. Some studies indicate that more than 100 percent of the adult population in the United States are interested in wireless Internet access. Wireless data services were marketed as modem access for laptop. As the advanced third generation infrastructure becomes available, and the inexpensive wireless handheld devices (e.g., wireless personal data assistant and wireless smart phones) become popular, subscribers will begin to enjoy instant wireless Internet access. The services include sales force automation, dispatch, instant content access, banking e-commerce, and so on. Mobile Computing: We must be able to distinguish between mobile computing and wireless networking. These two terms are not synonymous. You could do computing on the move with a wired connection to the network wherever you go: office, home, conference, hotel, and so on. However, wireless networking is, and will continue to be, an important ingredient of mobile computing because it offers users greater flexibility of movement. We must also be sensitized to the scarcity of resources in a mobile computing system, especially if the communication medium is wireless. Today's mobile computers run on batteries with a limited energy supply and might have low communication bandwidth. Technological advancements will improve battery performance and increase wireless-network bandwidth, but the resource scarcity is relative.