CDMA2000® 1xEV-DO

Release 0 / Revision A / Revision B

CDMA2000 1xEV-DOTechnology Overview

1xEV-DO (1x Evolution - Data Optimized), also abbreviated as EV-DO or EVDO, is a 3GPP2-based telecommunications standard for the wireless transmission of data and "voice over IP" (VoIP) through networks deployed worldwide as third-generation mobile communications systems. Originally deployed for data transmission only with Release 0, data transmission was limited to a peak data rate of 2.4 Mbit/s in the forward link (base station to terminal) and to 153 kbit/s in the reverse link (terminal to base station).

Revision A implemented VoIP capabilities and increased the peak data rate to 3.1 Mbit/s in the forward link and 1.8 Mbit/s in the reverse link. In addition, early termination of data throughput was made available in both links. Two other aspects also require mention: Typically small data packets were implemented for VoIP capabilities, and overall system performance enabled reduced latency (delay) parameters.

Revision B, which offers the technological performance of Revision A plus multicarrier capabilities, now provides higher single-carrier date rates of 4.9 Mbit/s and a combined multi-channel data speed of up to 4.9xN Mbit/s on the forward link, where N represents the number of channels. On the reverse link, the max. data rate is 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 carrier with a bandwidth of 1.25 MHz. Moreover, 1xEV-DO Revision A and Revision B also incorporate OFDM technology for broadcast applications.

Deployment Scenario

The advantage of 1xEV-DO is 100 % downward compatibility from Revision B to Release 0. As long as the hybrid mode is implemented in handsets or mobile phones, data throughput from the base station to the handset can be switched between CMDA2000® and 1xEV-DO technologies in the short term.

CDMA2000® and all 1xEV-DO technologies also operate on the existing CDMA frequency bands. Many CDMA2000® networks worldwide have already been upgraded to 1xEV-DO Release 0 or Revision A. Revision B networks are still in the planning phase.

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 Show / Hide
band classes (BC)
BC0) 800 MHz Band
UL: 815 MHz - 849 MHz
DL: 860 MHz - 894 MHz
BC1) 1900 MHz Band
UL: 1850 MHz - 1910 MHz
DL: 1930 MHz - 1990 MHz
BC2) TACS Band
UL: 872 MHz - 915 MHz
DL: 917 MHz - 960 MHz
BC3) JTACS Band
UL: 887 MHz - 925 MHz
DL: 832 MHz - 870 MHz
BC4) Korean PCS Band
UL: 1750 MHz - 1780 MHz
DL: 1840 MHz - 1870 MHz
BC5) 450 MHz Band
UL: 410 MHz - 483 MHz
DL: 420 MHz - 493 MHz
BC6) 2 GHz Band
UL: 1920 MHz - 1980 MHz
DL: 2110 MHz - 2170 MHz
BC7) 700 MHz Band
UL: 776 MHz - 794 MHz
DL: 746 MHz - 764 MHz
BC8) 1800 MHz Band
UL: 1710 MHz - 1785 MHz
DL: 1805 MHz - 1880 MHz
BC9) 900 MHz Band
UL: 880 MHz - 915 MHz
DL: 925 MHz - 960 MHz
BC10) Secondary 800 MHz Band
UL: 806 MHz - 901 MHz
DL: 851 MHz - 940 MHz
BC11) 400 MHz European PAMR Band
UL: 410 MHz - 483 MHz
DL: 420 MHz - 493 MHz
BC12) 800 MHz PAMR Band
UL: 870 MHz - 876 MHz
DL: 915 MHz - 921 MHz
BC13) 2.5 GHz IMT-2000 Extension Band
UL: 2500 MHz - 2570 MHz
DL: 2620 MHz - 2690 MHz
BC14) US PCS 1.9 GHz Band
UL: 1850 MHz - 1915 MHz
DL: 1930 MHz - 1995 MHz
BC15) AWS Band
UL: 1710 MHz - 1755 MHz
DL: 2110 MHz - 2155 MHz
BC16) US 2.5 GHz Band
UL: 2502 MHz - 2568 MHz
DL: 2624 MHz - 2690 MHz
BC17) US 2.5 GHz Forward Link Only Band
DL: 2624 MHz - 2690 MHz
BC18) 700 MHz Public Safety Band
UL: 757 MHz - 769 MHz
DL: 787 MHz - 799 MHz
BC19) Lower 700 MHz Band
UL: 728 MHz - 746 MHz
DL: 698 MHz - 716 MHz
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).