文档介绍：A White Paper from
the UMTS Forum
Towards Global
Mobile Broadband
Standardising the future of
munications with LTE
(Long Term Evolution)
February 2008
Table of Contents
1. Introduction: What is LTE? 1
2. A Clear Standardisation Path 2
3. LTE Key Features 3
4. Spectral Flexibility Means Wider Deployment Options 5
5. LTE Services 5
6. Who Needs LTE? 7
7. LTE Timescales 8
References 9
© The UMTS Forum 2008
I. Introduction: What is LTE?
Long Term Evolution (LTE) describes standardisation work by the Third Generation
Partnership Project (3GPP) to define a new high-speed radio access method for
munications systems.
LTE is the next step on a clearly-charted roadmap to so-called ‘4G’ mobile
systems that starts with today’s 2G and works. Building on the technical
foundations of the 3GPP family of cellular systems that embraces GSM, GPRS and
EDGE as well as WCDMA and now HSPA (High Speed Packet Access), LTE offers a
smooth evolutionary path to higher speeds and lower latency. Coupled with more
efficient use of operators’ finite spectrum assets, LTE enables an even richer, more
compelling mobile service environment.
A choice of upgrade paths
GSM EDGE WCDMA HSPA LTE
Non-3GPP technologies
LTE provides a smooth evolutionary path for operators deploying all 3GPP and
non-3GPP technologies.
In parallel with its advanced new radio interface, realising the full potential of LTE
requires an evolution from today’s hybrid packet/circuit works to a
simplified, all-IP ( Protocol) environment. From an operator’s point of
view, the pay-off is reduced delivery costs for rich, blended applications
combining voice, video and data services plus simplified interworking with other
fixed and works.
By creating new value-added service possibilities, LTE promises long-term revenue
stability and growth for around two hundred mobile operators that are already
mitted to the UMTS/HSPA family of 3G systems. Just as importantly, it
pro