Survey On UMTS And LTE Performance On The Basis Of Data Rates
In today’s era the enhancement in wireless communication, & high demands for mobile connectivity and the
evolution of new wireless multimedia applications have produced the motivation to the development of improved wireless
access technologies. Performance in Data Rate speed increases as technology enhancement takes place. Order of increased
speed is 2G, 3G (UMTS) then 4G (LTE) respectively. The data rate in LTE is enhanced by using better technologies. UMTS
uses Wideband Code Division Multiple Access (WCDMA) and High Speed Packet Access (HSPA). Currently the theoretical
maximum downlink (DL) speed is 14.4Mbps and of uplink (UL) is 5.7Mbps as per Release6-3GPP. Different technologies
are involved in LTE, for both air interface and core network. LTE uses Orthogonal Frequency Division Multiplexing
(OFDM) for radio access, together with more advanced MIMO schemes. Theoretical maximum data rates of LTE are
100Mbps in downlink (DL) and 50 Mbps in uplink (UL). In this paper we will take a glance at 3G & LTE (4G) technologies,
and a comparative study of 3G & LTE (4G) performance. Long Term Evolution (LTE) gives significant enhancements to
UMTS 3G systems which comprise improved data rates, system capacity and coverage, with reduced operating costs, low
latency, seamless backward compatibility, flexible bandwidth operations and multi antenna support. It’s a highly flexible
radio interface that aims at bridging the gap between 3rd generation and 4th generation standards.
Keywords- LTE, UMTS, Data Rates, Technology, Uplink, Downlink, Evolution.