User Manual

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Differentiating Between Wireless Technologies
4G Technologies
Fourth generation technologies made their market debut in 2009. The goal of 4G is to increase downlink speed
to 100 Mbps and uplink speed to 50 Mbps. The two major competing technologies in the 4G market are Long
Term Evolution (LTE) and WiMax sponsored by the IEEE Group.
Possible 4G Standards
WiMAX (Worldwide Interoperability for Microwave Access): Led by Intel Corporation, this is the 4G
technology with the farthest transmission range. Its highest downlink and uplink speed under mobile
communication environments can reach 75 Mbps and 50 Mbps respectively. On November 12, 2008, HTC
and Russian carrier Scartel (branded Yota) jointly launched the world’s first GSM-WiMAX integrated dual-
module mobile phone—HTC Max 4G.
UMB (Ultra Mobile Broadband): Led by Qualcomm Inc., this is the evolution standard of CDMA
technology. It has the highest transmission speed among 4G technologies currently. The highest downlink
and uplink speed under mobile communication environments can reach 288 Mbps and 75 Mbps
respectively.
LTE (Long Term Evolution): LTE is led by ETSI. Its highest downlink and uplink speed under mobile
communication environments can reach 100 Mbps and 50 Mbps respectively.
In December 2008, the Third Generation Partnership Project, also known as 3GPP, announced 3GPP
Release 8 to enhance data transmission speed in mobile networks. Release 8 standardizes the LTE and
makes it a more viable candidate for the nascent 4G standard. LTE uses both Frequency Division Depex
(FDD) and Time Division Duplex (TDD), and is able to operate on different bands ranging from 700 MHz
to 2.6 GHz. This also makes it possible to incorporate the now incompatible GSM and WCDMA and also
reduces costs.
CDMA2000 1xEV (Evolution)
CDMA2000 1xEV is CDMA2000 1x equipped with HDR. 1xEV, in general, has two sessions:
• CDMA2000 1xEV 1st session—CDMA2000 1xEV-DO, in light of the fast data transmitted under a wireless
channel, supports downlink data speeds up to 3.1 Mbps with uplink up to 1.8 Mbps.
• CDMA2000 1xEV 2nd session—CDMA2000 1xEV-DV (Evolution-Data and Voice) supports downlink data
speeds up to 3.1 Mbps with uplink up to 1.8 Mbps. 1xEV-DV also supports 1x voice subscribers, 1xRTT
data subscribers, and high speed 1xEV-DV data subscribers to use the same wireless channel at the same
time.