Essay on Emerging Wireless Technologies

2237 Words Feb 26th, 2011 9 Pages
Emerging Wireless Technologies
A look into the future of wireless communications – beyond 3G
Forward: The Public Safety Wireless Network (PSWN) Program is conducting an ongoing assessment of advancements in the wireless communications industry. The scope of this assessment is to identify emerging wireless services and technologies for potential public safety use in the near future and beyond. This particular document is the first of a series of emerging wireless technologies studies. This study will concentrate primarily on the fourth generation of mobile telecommunications and beyond.

3G – i.e., an entirely packet switched network with all digital network elements and extremely high available bandwidth. For the most part, it is
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Currently, different wireless technologies (e.g., GSM, CDMA, and TDMA1) are used throughout the world for the 2G, 2.5G, and eventually 3G networks. There are two approaches being used to develop 4G access techniques: 3xRTT (currently 1xRTT for 2.5 and 3G) and Wideband CDMA (W-CDMA). These disparate access techniques currently do not interoperate. This issue may be solved with software defined radios. LinkAir Communications is developing a new access technology called large-area-synchronized code-division multiple access (LAS-CDMA). LASCDMA will be compatible with all current and future standards, and there is a relatively
1 GSM – Global System for Mobile Communications
CDMA – Code Division Multiple Access TDMA – Time Division Multiple Access

easy transition from existing systems to LAS-CDMA (using software defined radios). LinkAir emphasizes that LASCDMA will accommodate all the advanced technologies planned for 4G and that LASCDMA will further enhance either 3xRTT or W-CDMA system’s performance and capacity. Internet Speeds 2.5G is the interim solution for current 2G networks to have 3G functionality. 2.5G networks are being designed such that a smooth transition (software upgrade) to 3G can be realized. 2.5G networks currently offer true data speeds up to 28kbps. In comparison, the theoretical speed of 3G can be up to 2 Mbps, i.e., approximately 200 times faster than previous 2G

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