【资料名称】：4G Network Migrationcdma2000 to LTE Evol

【资料作者】：www.motorola.com/serviceproviders

【资料日期】：2009

【资料语言】：英文

【资料格式】：PDF

【资料目录和简介】：

Today’s wireless users may use their mobile devices in thousands of different ways, but they have one thing in common – a seemingly insatiable hunger for more. By the end of the decade, satisfying the demand for advanced services will not be possible on 3G legacy networks. That’s why many traditional cdma2000 service providers are investigating technology alternatives in order to maintain and grow profitability. Motorola can offer a direct, well planned transition path that evolves service providers from cdma2000 to LTE and makes use of the existing CDMA network coverage with seamless hand-over between CDMA and LTE.

cdma2000® Leading the Industry with Innovation
CDMA has continuously led the industry in innovation since the late 1980s. Today, cdma2000 is an accepted standard for 3G networks. However there was a time when the concept of basing an air interface on code-division, rather than traditional time-division technology, was revolutionary.
The first analog cellular systems were deployed in the early 1980s, and were the beginning of this new wireless era. By the late 80s, carriers realized that analog technology could not provide the capacity they would need as wireless technology continued to be readily adopted. It was also apparent that the IS-54 standard (U.S. TDMA), would not satisfy the projected capacity needs.
A digital satellite technology showed promise for more efficient use of spectrum. Instead of GSM and TDMA’s time-division-based technology, this code-division-based system encoded multiple voice conversations on an assigned 1.25 MHz carrier. The technology was being used for fleet-tracking by a then little-known San Diego, U.S. company called QUALCOMM Inc. As CDMA began entering the marketplace it was vital to convince service providers of the realities of CDMA’s efficiency, cost-effectiveness, and ease of implementation. It was Migrationcritical to ensure that service providers understood CDMA’s ability to increase system capacity and that the future was designed so that upgrades would be inexpensive and simple, allowing CDMA service providers to offer advanced features and services very quickly.
The first CDMA standard for mobile networks is referred to as Interim Standard 95A (IS 95A). The IS-95A standard was completed in 1993 and served as a digital wireless technology that could replace analog systems. IS-95B is an upgrade to IS-95A. Both IS-95A and IS-95B are considered to be 2G technologies. 1X is the technology that follows IS-95. The term 1X is an abbreviation of 1xRTT (1x Radio Transmission Technology). 1X is considered to be 2.5G technology. EV-DO Revision 0 is a data centric technology that allows service providers to take advantage of the performance characteristics of the technology to offer advanced data services. The standard, cdma2000 High Rate Packet Data Air Interface, IS-856, was approved in August 2001. EV-DO Revision A (TIA-856-A) is the first in a series of planned upgrades for Release 0. The Revision A standard was approved in March 2004, with commercial services beginning at the end of 2006. EV-DO is considered to be 3G technology.