CDMA2000® 1xEV-DO
Release 0 / Revision A / Revision B
Technology Overview
1xEV-DO, also known as EV-DO, is an all-IP 3G mobile telecommunications standard for wireless transmission of data with significant deployments worldwide. The technology has gone through several revisions from Release 0 to Revision A to Revision B.
Revision A introduced enhanced capabilities such as reduced latency, QoS support and increased the peak data rate to 3.1 Mbit/s in the forward link and 1.8 Mbit/s in the reverse link. This provided support for a variety of delay-sensitive applications such as VoIP and push-to-talk services.
Revision B, which offers the technological performance of Revision A plus multicarrier capabilities, now provides higher single-carrier data rates of 4.9 Mbit/s and a combined multicarrier data rate of up to 4.9xN Mbit/s on the forward link, where N represents the number of channels. On the reverse link, the highest data rates are 1.8xN Mbit/s, where N represents the number of 1.25 MHz carriers provided for the transmission system.
All three revisions are based on a channel bandwidth of 1.25 MHz and operate on the same frequency bands, making EV-DO technology and test solutions requirements similar to CDMA2000® 1xRTT.
Deployment Scenario
One of the key advantages of EV-DO is 100 % downward compatibility from Revision B to Release 0, while maintaining the ability to hand down data connections to CDMA2000® 1xRTT, providing for seamless data connectivity across the two technologies. In addition, the hybrid mode feature provides seamless fallback for circuit switched services such as voice and SMS.
Rohde & Schwarz Test Solutions
Rohde & Schwarz supports 1xEV-DO with a broad product portfolio for transmitter and receiver tests, radiocommunications, and drive test solutions. Mainly provided as software and firmware options in multistandard devices, these solutions can be updated when standards are changed.
Key Parameters
| CDMA2000® 1xEV-DO | |
|---|---|
| Frequency Range |
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| Modulation |
QPSK, 8PSK, 16QAM (DL, Rel. 0/Rev. A) BPSK, QPSK, 8PSK (UL, Rel. 0/Rev. A) QPSK, 8PSK, 16QAM, 64QAM (DL, Rev. B) BPSK, QPSK, 8PSK (UL, Rev. B) |
| Multiple Access |
TDMA (DL) CDMA (UL) |
| Duplex (Uplink/Downlink) | FDD |
| Channel Bandwidth |
1.25 MHz (Rel. 0/Rev. A) 1.25 MHz x N (Rev. B) (N = number of Channels, max. 15) |
| Peak Data Rate | 2.4 Mbit/s
(DL, Rel. 0) 153 kbit/s (UL, Rel. 0) 3.1 Mbit/s (DL, Rev. A) 1.8 Mbit/s (UL, Rev. A) 4.9 Mbit/s x N (DL, 64QAM, Rev. B) 1.8 Mbit/s x N (UL, Rev. B) (N = number of channels, max. 15) |
Standardization
1xEV-DO is being specified in 3GPP2 (3rd Generation Partnership Project 2). The following link provides access to 3GPP2 specifications: http://www.3gpp2.org/Public_html/specs/index.cfm
CDMA2000® is a registered trademark of the Telecommunications Industry Association (TIA -USA).