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computer science crazy
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08-04-2009, 06:45 AM

CDMA2000 is a technology for the development of cdmaOne/IS-95 to 3rd generation services. Also known as IMT-CDMA Multi-Carrier or IS-2000 is the main route for CDMA operators to second-and-a-half ( 2.5G) and third generation (3G) cellular networks. A set of new standards that define the new air interface and the Radio Access and Core Network changes that will enhance network capacity, improve speed and bandwidth to mobile terminals, and allow end-to-end IP services has been created by the standard-setting body behind CDMA2000 known as 3GPP2. CDMA2000 will provide improved services to cdmaOne subscribers, as well as forward and backward capabilities in terminals.

Deployed in various phases, the first phase called CDMA2000 1x, supports an average of 144 kbps packet data in a mobile environment. The second release 1x-EV-DO will support data rates up to 2 Mbits/sec on a dedicated data carrier. Lastly, 1x-EV-DV will supports higher peak rates and simultaneous voice and high-speed data, as well as improved Quality of Service mechanisms. The CDMA2000 PCN(Packet Core Network) is one of the first steps in the evolution of CDMA2000 systems to All-IP and multi-media architecture that allows for the delivery of packet data services with more speed and security.

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