Evolution Data Only

From Freepedia

(Redirected from 1xEV-DO)

Evolution Data Only or Evolution Data Optimized, often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO is a wireless radio broadband data protocol being adopted by many CDMA mobile phone providers in New Zealand, Venezuela, Mexico, Brazil, Japan, Korea, Israel, the United States, Australia and Canada as part of the cdma2000 standard. 1xEVDO is pronounced "One Ex-E:- Vee-Dee-Oh." It is commonly referred in the industry as DO (Dee-Oh).

Compared to 1xRTT networks currently being used by operators, or the GPRS and EDGE networks employed by their GSM competitors, 1xEV-DO is significantly faster, providing access terminals with download speeds of up to 2.4 Mbit/s. Only terminals with 1xEV-DO chipsets can take advantage of the higher speeds.

It should be noted that 1xEV-DO part of the cdma2000 (the standards title is "cdma2000 High Rate Packet Data Air Interface Specification"). The latest version of the 1xEV-DO standard can be found in IS-856-A-1. The initial design of 1xEV-DO was developed by Qualcomm in 1999 to meet IMT-2000 requirements for greater than 2 Mbit/s downlink for stationary communications. Initially, the standard was called HDR (High Data Rate), and renamed to 1xEV-DO, Rev. 0 after it was ratified by the ITU. When deployed with a voice network, 1xEV-DO requires a separate radio channel of approximately 1.25 MHz. A successor to 1xEV-DO is planned for deployment in 2006 and 2007, and is known as 1xEV-DO Rev A. Rev. A offers fast packet establishment on both the forward and reverse links along with air interface enhancements that reduce latency and improve data rates.

A competing standard called 1xTREME was offered to the ITU by Motorola, Nokia, and Texas Instruments. This standard was ratified by the ITU, and placed into the evolution of CDMA as cdma2000 Rev. C and Rev D. This standard became known as 1xEV-DV, for Evolution-Data/Voice, since the channel structure was backwards compatible with IS-95 and cdma2000, allowing an in-band network deployment. (1xEV-DO requires an overlay network when deployed in mixed mode.) It should be noted that from both a technical and financial perspective 1xEV-DV was more attractive to operators, as the capital spent for the network deployment and management of disparate 1xRTT (cdma2000) and 1xEVDO networks is both significant and difficult. However, the equipment was not available for 1xEV-DV in time to meet market demands so wireless operators deployed 1xEV-DO service instead.

With the dual announcement of Verizon and Sprint's deployment of 1xEV-DO in 2004, and similar announcements by smaller operators in 2005, Qualcomm in March of 2005 suspended development of 1xEV-DV chipsets, and focused their efforts toward improving the 1xEV-DO product line.

Contents

EVDO AirCards

  • Audiovox PC5220
  • Sierra Aircard 580
  • Novatel v620 / Merlin S620 - Diversity Antenna
  • Kyocera KPC650 - Diversity Antenna
  • Audiovox PC5740

EV-DO networks

The following companies have 1xEV-DO networks in production:

  • CANTV Movilnet in Venezuela. Product name is "ABA Móvil" and is available on all major cities. More information about the product and coverage can be found here.
  • Iusacell - Coverage in México City, Monterrey, Guadalajara and Villahermosa
  • ACS Wireless - coverage in Alaska
  • Alltel - limited coverage
  • Sprint - in development (coverage in major cities and airports) - check coverage in your area [1].
  • Telecom New Zealand - limited coverage
  • Telstra - (Australia) coverage in major metropolitan areas
  • Verizon Wireless - coverage in 60 cities (as of 09/29/05) - check evdo (http://www.evdoinfo.com) coverage in your area [2]. Verizon EVDO Coverage 150 million population, Verizon 1xRTT 240 million population
  • VIVO - limited coverage
  • Telecard - Limited coverage in Islamabad, Pakistan
  • Bell Mobility is currently constructing a 1xEV-DO network in Canada, with trials underway in the Greater Toronto Area. Full rollout is expected in late 2005.
  • Pelephone 80% of populated area in Israel. Full rollout is expected in 2005.

EV-DO network providers

The following companies are leading infrastructure providers of EV-DO equipment

1xEV-DO phones

Some phones that are 1xEV-DO enabled are:

EVDO Resources

Here are some resources on EVDO:

Retrieved from "http://en.freepedia.org/Evolution_Data_Only.html"


Views
Personal tools
Similar Links