5
3GPP2 CDMA2000 1xEV-DO
5.1 Introduction
Chapter 5 will briefly look into the evolution of cdma2000 based systems that is, 1xEV-DO (Evolution Data Optimized). The 3GPP21 cdma2000 family of standards defines a spread spectrum radio interface that uses the CDMA technology to meet the requirements for 3G wireless communication systems [1]. The world’s first cdma2000 1X2 system was launched by SK (Sun Kyung) Telecom in October 2000 in South Korea. These systems nearly doubled the voice capacity as compared to 2G (cdmaOne), increased the data rates to 153 kbps in both directions, and improved battery life of handsets among many other attributes. Then cdma2000 1xEV-DO systems were introduced to support higher data rates and multimedia applications. The two successful revisions of EV-DO technology are Revision 0 and Revision A. In 2007, multi carrier EV-DO Revision B was standardized and commercial deployments are expected in the coming years. The latest OFMDA-based revision called EV-DO Release C or Ultra Mobile Broadband (UMB) was standardized in 2007 to compete with WiMAX and 3G-LTE. UMB did not receive much attention from the industry and almost all the R&D activities have been suspended and it is no longer on the roadmap of any operator. Thus, EV-DO systems were continuously evolving till the industry decided to shelve the UMB in favor of competing EPS and WiMAX technologies. The evolution of CDMA standards is shown in Figure 5.1.
Figure 5.1 CDMA evolution
This chapter is designed ...
