CDMA2000 1xEV-DO Rev B CDMA Protocol

CDMA2000 1xEV-DO Rev B is an enhancement to the CDMA2000 1xEV-DO wireless technology, which is part of the CDMA2000 family of standards. Here’s an overview of its history and key features:

History

The CDMA2000 1xEV-DO technology evolved from the CDMAOne (IS-95) standard, which was a 2G technology. The first release of CDMA2000 1xEV-DO, known as Release 0, was introduced in 1999. This initial release provided peak data rates of up to 2.4 Mbps in the forward link and 153 kbps in the reverse link, with average throughputs of 400-800 kbps in the forward link.

Evolution to Rev A

CDMA2000 1xEV-DO Rev A, released in 2001, significantly improved the technology. It enhanced the peak data rates, with up to 3.1 Mbps in the forward link and 1.8 Mbps in the reverse link. This revision also introduced lower latency and improved Quality of Service (QoS), making it suitable for delay-sensitive applications like VoIP and video telephony.

Evolution to Rev B

CDMA2000 1xEV-DO Rev B, released in 2004, built upon the enhancements of Rev A. One of the key features of Rev B is the introduction of multicarrier capabilities. This allowed for higher single-carrier data rates and improved overall network performance. Specifically, Rev B supports peak rates of up to 73.5 Mbps in the forward link and 27 Mbps in the reverse link through the aggregation of 15, 1.25 MHz carriers within a 20 MHz bandwidth.

Key Features of Rev B

  • Multicarrier Capabilities: The ability to aggregate multiple carriers to achieve higher data rates.
  • Enhanced Data Rates: Supports peak data rates of up to 73.5 Mbps in the forward link and 27 Mbps in the reverse link.
  • Improved Latency and QoS: Continued focus on reducing latency and enhancing QoS for better performance of delay-sensitive applications.

Impact on Mobile Networks

CDMA2000 1xEV-DO Rev B played a crucial role in the evolution of mobile networks towards higher data speeds and better QoS. It provided a significant upgrade path for operators transitioning from 2G to 3G technologies, offering broadband data applications and services that were comparable to early HSPA and HSPA+ networks. However, the adoption of EV-DO Rev B was not as widespread as other technologies like HSPA+, primarily due to the lack of a competing 4G standard from 3GPP2 and the eventual convergence towards LTE as the next-generation standard.