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Difference Between 4G and LTE

Aug 18th, 2011 | By Andrew

4G vs LTE

4G, known as 4th generation of mobile

communications, and LTE (Long Term Evolution)

are 3GPP specifications for mobile broadband

networks. Different eras of mobile communication

are categorized into generations such as 1G, 2G,

3G, and 4G, where each generation has a

number of technologies such as LTE. ITU

(International Telecommunication Union)

considers LTE-Advanced as the true 4G

standard, while it also accepts LTE as a 4G

standard.

4G

ITU considers IMT-Advanced (International Mobile

Telecommunication) technologies as true 4G

standards. As per the official definition, IMT-Advanced should be able to deliver peak download speeds of

1Gbps in stationary environments, while 100Mbps in high mobile environments. Initially, ITU completed

the assessment of 6 candidate’s wireless mobile broadband standards for official 4G standard. Finally, 2

technologies, LTE Advanced and WirelessMAN-Advanced are accorded the official designation of IMT-

Advanced. Even though, LTE Advanced is considered as true 4G standard, ITU also allowed to use

HSPA+,WiMax and LTE as 4th generation technologies. As per the IMT-Advanced specification peak

spectral efficiency should be 15bps/Hz for downlink and 6.75bps/Hz for uplink. This spectral efficiency

and other IMT-Advanced requirements are achieved by 3GPP Release 10 (LTE-Advanced).

LTE

LTE was initiated with the 3GPP Release 8 (Freeze in March 2008), and further evolved in 9 and 10

releases. High spectral efficiency is one of the key features of LTE which was achieved using Orthogonal

Frequency Division Multiple Access (OFDMA) with 64-QAM (Quadrature Amplitude Modulation)

technique. Use of MIMO (Multiple Input Multiple Output) antenna techniques is another key point which

improved the spectral efficiency of LTE to 15bps/Hz. LTE should be able to support up to 300Mbps

downlink and 75Mbps in uplink as per the 3GPP specification. Architecture of LTE is much simpler and

flat when compared with the previous 3GPP releases. eNode-B directly connects with System

Architecture Evolution Gateway (SAE-GW) for data transfer, while it connects with Mobile Management

Entity (MME) for signaling as per the LTE architecture. This simple eUTRAN architecture allows better

utilization of resources, which ultimately ends up with OPEX and CAPEX savings to the service provider.

What is the difference between 4G and LTE?

¤ LTE Advanced, which is also known as true 4G standard, is evolution of LTE standard.

Therefore, LTE and LTE Advanced have compatibility, where LTE terminal can work in LTE

Advanced network, and LTE Advanced Terminal can work in LTE network.

¤ Capacities of true 4G standards are much higher when compared with LTE. LTE supports up

to a maximum of 2.7 bps/Hz/cell, while LTE Advanced (True 4G) has a capacity of 3.7

bps/Hz/cell. Even though, both LTE and LTE-Advanced (true 4G) support the same spectral

efficiency in downlink, uplink spectral efficiency is much higher with true 4G.

¤ Both LTE and 4G are focused on data rate improvement. Peak downlink data rate of LTE is

300Mbps, while official 4G definition requires 1Gbps downlink data rate. Therefore, true 4G has

much higher data rate when compared with LTE, in both uplink as well as in downlink.

¤ LTE is known as 3GPP release 8, while true 4G is considered as 3GPP release 10, which is

evolution of initial LTE technology.

¤ LTE networks are being deployed around the world now, while true 4G networks are still

pending for trials. This is simply due to the stability of LTE when compared with LTE-

Advanced. Initial LTE standards are published in March 2008, whereas initial stages of LTE-

Advanced (True 4G) were standardized in March 2010.

Access Network

4G and LTE

TELUS 4G and 4G+ LTE

Narrowband and

Wideband

Broadband and

Narrowband

HSDPA and HSUPA

Data Roaming and

Cellular Data

RFID and NFC

Wireless Broadband and

Mobile Broadband

WCDMA and LTE

CDMA and WCDMA

GSM and 3G Network

Technology

ATM and Frame Relay

HLR and VLR

HSPA+ and LTE

RFID and Bluetooth

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Advanced (True 4G) were standardized in March 2010.

¤ 4G is the next generation of mobile broadband communication, whereas LTE is the basis for

true 4G technologies such as LTE-Advanced.

Rating: 5.0/5 (1 vote cast)

Related posts:

1. Difference Between WCDMA and LTE

2. Difference Between TELUS 4G and 4G+ LTE

3. Difference Between HSPA+ and LTE

4. Difference Between CDMA and LTE Network Technology

5. Difference Between CDMA EV-DO and HSPA Network Technology

6. Difference Between LTE and LTE Advanced

7. Difference Between 3G and 4G Network Technology

8. Difference Between Telstra 3G and Next G and 4G LTE

9. Difference Between HSPA and HSPA+ Network Technology

10. Difference Between Wireless Broadband and Mobile Broadband

11. Difference Between GSM and 3G Network Technology

12. Difference Between 3G and 4G in Australia

13. Difference Between WiMAX and WiMAX2 Network Technology

14. Difference Between LTE and WiMAX

15. Difference Between HSDPA and HSUPA

Tags: 100Mbps, 1Gbps, 3GPP Release 10, 3GPP release 8, 3GPP Release 9, 3GPP

specification, 4G, 4G download speeds, 4G LTE, 4G standard, 4G technologies, 4G+LTE, 4th

generation of mobile communications, 64 QAM, eNode-B, eUTRAN architecture, HSPA, IMT

Advanced, IMT-Advanced technologies, LTE, LTE Advanced, MIMO, MME, OFDMA, official

4G standard, Peak downlink data rate of LTE, Peak downlink data rate of LTE Advanced,

peak spectral efficiency, SAE-GW, true 4G, true 4G standard, Wimax, WirelessMAN-

Advanced

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