This document compares the 4G wireless technologies WiMAX and 3GPP-LTE. It finds that while technically similar, WiMAX appears poised to reach the market sooner with initial deployments beginning in 2007-2008, while 3GPP-LTE deployments are not expected until 2010. WiMAX also has an earlier standard completion in 2005 versus 2007 for 3GPP-LTE. Due to its earlier timeline, the document concludes WiMAX is likely to be adopted by new service providers and those looking to offer mobile services sooner, while major UMTS providers will evolve to 3GPP-LTE over time.

1. A Comparison of Two
Fourth Generation Technologies:
WiMAX and 3GPP-LTE
Jacob Scheim
December 2006
White Paper

2. 1 Introduction
Modern wireless wide area networks (WWAN) and wireless metropolitan area networks
(MAN) are under extensive investigation in recent years with a view to progressing
towards 4th generation (4G) public wireless networks. The intensive standardization
activity, currently in its final stages, may be considered as a major step towards 4G.
One well known example of this standardization effort is the IEEE 802.16e–2005
standard for fixed and mobile broadband wireless access (Mobile WiMAX). Early
systems based on this standard are expected to be deployed starting from 2007.
A parallel standardization effort is the evolved UMTS terrestrial radio access network
(E-UTRAN) — also known as 3GPP Long Term Evolution (3GPP-LTE) — launched by the
3rd generation standardization body (3GPP). This standardization activity has recently
moved on to a working item phase and is expected to conclude during 2007. Similar to
the IEEE 802.16e-2005 standard, 3GPP-LTE radio access is expected to be based on
OFDMA.
These standards provide the foundation for constructing networks for mobile broadband
wireless access and therefore are considered as precursors to 4G. In addition, there are
also other OFDM/A based research activities, non-3GPP or WiMAX related, that are
targeting 4th generation wireless access networks.
2 Comparison
Table 1 below presents the key elements of a comparison between the Mobile WiMAX
and 3GPP-LTE standards as they converge to 4G broadband wireless access systems.
This comparison focuses mainly on the physical layer aspects of the radio access
technology of these two standards.
Table 1. Comparison of 3GPP-LTE and IEEE 802.16e
Mobile WiMAX 3GPP-LTE
Aspect
(IEEE802.16e-2005) (E-UTRAN)
Core network WiMAX Forum™ All-IP network UTRAN moving towards All-IP
Evolved UTRA CN with IMS
Access technology:
Downlink (DL) OFDMA OFDMA
Uplink (UL) OFDMA SC-FDMA
Existing and new frequency
2.3-2.4GHz, 2.496-2.69GHz,
Frequency band bands
3.3-3.8GHz
(~2GHz)
Bit-rate/Site:
DL 75Mbps (MIMO 2TX 2RX) 100Mbps (MIMO 2TX 2RX)
UL 25Mbps 50Mbps
Channel bandwidth 5, 8.75, 10MHz 1.25-20MHz
Cell radius 2-7Km 5Km
>200 users @ 5MHz
Cell capacity 100-200 users
>400 users for larger BW
Spectral efficiency 3.75[bits/sec/Hz] 5[bits/sec/Hz]
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A Comparison of Two Fourth Generation Technologies: WiMAX and 3GPP-LTE

3. Mobile WiMAX 3GPP-LTE
Aspect
(IEEE802.16e-2005) (E-UTRAN)
Mobility:
Speed Up to 120Km/H Up to 250Km/H
Handovers Optimized hard handovers supported Inter-cell soft handovers
supported
Legacy IEEE802.16a through 16d GSM/GPRS/EGPRS/UMTS/HSPA
MIMO:
DL 2Tx X 2Rx 2Tx X 2Rx
UL 1Tx X NRx (Collaborative SM) 2Tx X 2Rx
No. of code words 1 2
Standardization IEEE 802.16e-2005 PHY and MAC
RAN (PHY+MAC) + CN
coverage CN standardization in WiMAX forum™
New (work in process in WiMAX Auto through existing
Roaming framework
Forum™) GSM/UMTS
Schedule forecast:
Standard completed 2005 2007
Initial Deployment 2007 through 2008 2010
Mass market 2009 2012
3 Conclusion
The parameters presented in Table 1 show that the Mobile WiMAX and 3GPP-LTE
standards are technically similar. However, in terms of market perspective the two
standards differ in terms of expected time to market and legacy. Although currently
less mature and widespread, Mobile WiMAX appears as if it will be first to market.
Significantly, WiMAX is already being tested (e.g., in Korea), whereas LTE has not
yet been standardized.
Following this observation, we may conclude that due to timeline benefits new service
providers as well as existing cable and DSL providers wishing to offer mobile services
are likely to select Mobile WiMAX as their technology for mobile broadband access. We
may also conclude that in the developed world major UMTS/HSPA service providers will
naturally evolve to 3GPP-LTE, whereas most CDMA2000 providers, as well as
GSM/EDGE providers in the developing world, will select Mobile WiMAX for mobile
broadband wireless access while providing service continuity over their legacy
networks.
4 References
[1] 3GPP TR 25.814 v7.0.0 3GPP; Technical Specification Group Radio Access Network;
Physical layer aspects for evolved Universal Terrestrial Radio Access (UTRA).
[2] WiMAX Forum Mobile System Profile, V1.2.0 Sept. 2006.
[3] Source: WiMAX forum.
Mr. Jacob Scheim, Ph.D., Telephone: +972 9 971 7888,
Kobi.scheim@comsysmobile.com http://www.comsysmobile.com
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A Comparison of Two Fourth Generation Technologies: WiMAX and 3GPP-LTE