LTE-BASICS-ppt

1. By: Kumar
Biplab Singh
LTE BASICS

2. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 2
LTE MARKET SITUATION
› Mobile data traffic is growing exponentially, caused by
mobile internet offerings and improved user experience
with new device types.
› LTE is accepted worldwide as the long term evolution
perspective for today's 2G and 3G networks based on
WCDMA/HSPA, GSM/EDGE, TD-SCDMA and CDMA2000
technologies

3. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 3
LTE IN BREIF
Work on 3G implemented on December 2004.
Why LTE?
› Reduced latency
› Higher user data rates
› Improved system capacity and coverage
› Cost Reduction

4. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 4
CLOSER LOOK OF LTE
Higher peak data rates: 100mbps( downlink) and 50 mbps (uplink)
Improved spectrum efficiency 2-4 times better compared to release 6
Improved latency:
Radio access network latency below 10ms
Significantly reduced control plane latency
Support of scalable bandwidth 1.4,3,5,10,15,20 MHZ
Support of paired and unpaired spectrum (FDD and TDD mode)
Support for internetworking with legacy networks
Cost-efficiency:
Reduced CApital and OPerational EXpenditures (CAPEX , OPEX)
including backhaul
Cost-effective migration from legacy networks

5. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 5
Evolution Of UMTS FDD and TDD
FDD
evolution
WCDMA HSPA/HSUPA HSPA+ LTE-LTE
advanced
TDD
evolution
TD-SCDMA TD-HSDPA TD-HSUPA TD-LTE and
TD-HSPA+

6. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 6
Evolution Of UMTS FDD and TDD
3GPP release 3GPP release
99/4
3GPP release
5/6
3GPP
release
7
3GPP release
8
Year Of
Network
Rollout
2003/4 2005/6(HSDPA)
2007/8(HSUPA)
2008/200
9
2010
Downlink
data rate
384 kbps 14 mbps 28mbps LTE(150mbps)
HSPA+(42mbps)
UP link
data rate
128 kbps 5.7mbps 11mbps LTE(75mbps)
HSPA+(11mbps)
Round
trip time
~150ms <100ms <50 ms LTE~10ms

7. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 7
LTE KEY PARAMETRS
Frequency
Range
UMTS FDD bands And UMTS TDD bands
Channel
bandwidth
1 resource
Block=180 kHz
1.4Mhz 3Mhz 5Mhz 10Mhz 15Mhz 20Mhz
8
Resource
Blocks
15
Resource
Blocks
25
Resource
Blocks
50
Resource
Blocks
75
Resource
Blocks
100
Resource
Blocks
Modulation
Scheme
Downlink :QPSK ,16 QAM, 64 QAM
Uplink: :QPSK ,16 QAM, 64 QAM
Multiple
Access
Downlink :OFDMA (orthogonal frequency division multiple access)
Uplink : SC-FDMA(single carrier frequency division multiple access)
MIMO technology Downlink :Wide choice of MIMO configuration options for transmit diversity,
spatial multiplexing and cyclic delay diversity
Uplink: Multi user collaborate MIMO
Peak Data rate Downlink :150 Mbps (UE category 4, 2x2 MIMO,20Hz
300 Mbps (UE category 5, 4x4 MIMO,20Hz
Uplink : 75 Mbps(20Mhz)

8. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 8
LTE Frequency Bands

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LTE Architecture
Ip core
Uu
Interface
Mobile Equipment
(ME)
eNODE B
eNODE B
MME
HSS
PRCF
Billing System
Internet
PSTN
PGW
SGW
SGSN
X2
Interface
S1 Interface
WCDMA
GSM/GPRS

10. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 10
Brief Explanation Of Architecture
› SAE (System Architecture Evolution)
› ME(Mobile Equipment)
› eNODE B(Enhanced Node B)
› MME (Mobile Management Entity)
› GW (Signaling and Packet Gateway)
› HSS(Home subscriber Server Database)
› PRCF(Policy And Charging Rule Function)

11. RAN PPM 2011 | Commercial in confidence | © Ericsson AB 2011 | 2011-05-06 | Page 11