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Overview

EV-DO is an evolution of the IS-95 CDMA mobile radio communication system and stands for EVolution Data Optimized. As is evident from the name, EV-DO was designed for optimizing data traffic rather than the standard speech traffic. Hence, EV-DO offers packetized bearer transport only. Voice traffic can be carried over EV-DO using technologies such as VoIP. Another objective for EV-DO was to minimize the changes required to its precursor, IS-95. Hence for example, EV-DO uses the same 1.25 MHz carriers as IS-95. EV-DO is also designed for asymmetric traffic with the forward link capacity significantly higher than the reverse link capacity.

EV-DO is one of the specifications from the CDMA2000 3rd Generation wireless systems project. The 1xEV working group was founded in the 3GPP2 in 2000. The current official name is CDMA2000 HRPD (High Rate Packet Data). EV-DO services include high data rate broadband transmission, streaming media and prioritization, Quality of Service (QoS), multicast services, location based services, etc.

Over the years, the EV-DO standard itself has been refined and newer revisions have been published. The first standard is known as EV-DO Rev 0. This was followed by EV-DO Rev A, Rev B and Rev C, work on which is ongoing. This white-paper will focus on Rev 0 only.

Abbreviations

ACK Acknowledgment

AN Access Node (see also BTS)

ARQ Automatic Repeat Request

AT Access Terminal (see also MT)

BER Bit Error Rate

BTS Base Transceiver Station

CDMA Code Division Multiple Access

CSI Channel State Information

DRC Data Rate Control

EV-DO Evolution-Data Optimized

FER Frame Error Rate

FL Forward Link

FTC Forward Traffic Channel

HARQ Hybrid ARQ

HRPD High Rate Packet Data

IP Internet Protocol

MAC Medium Access Control

MT Mobile Terminal

LUP Location Update Protocol

PCT Power Control Threshold

PSK Phase Shift Keying

QAM Quadrature Amplitude Modulation

QoS Quality of Service

QPSK Quaternary Phase Shift Keying

RAB Reverse Activity Bit

RAC Reverse Activity (sub-)Channel

RL Reverse Link

RLP Radio Link Protocol

RPC Reverse Power Control

RRI Reverse Rate Indicator

RTC Reverse Traffic Channel

SINR Signal To Interference and Noise Ratio

SLP Signaling Link Protocol

SNP Signaling Network Protocol

VoIP Voice Over IP