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LTE (Long Term Evolution) for Public Safety Ajit Kahaduwe Head of Ecosystem Innovation
10/15/2013 Document ID / v. 0.1 / Life cycle status / Dept. / Author
2 2013 Nokia Solutions and Networks. All rights reserved.
Who we are: Introduction to Nokia Solutions & Networks
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Global company with a rich heritage
13.4 50,500 no.1 59 120 2011 2007
Ranking, macro base station vendor competitive assessment
LTE suppliers to launched operator networks
Employees globally
Our net sales in 2012
bn
120+
Started Telecoms experience in years
Countries we operate in
We acquired Motorolas wireless network
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Market Drivers for evolution from existing systems to LTE
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Continuing the evolution from GSM to LTE Commercial Drivers for LTE
Re-use of Sites and
infrastructure Backhauling Frequency bands
User experience ARPU
Scalable bandwidth
Investment Protection
Optimized spectrum usage
2006 2008 2010 2012 2014 2016 2018 2020
900 MHz
900 MHz GSM or
GSM UMTS
LTE
HSPA HSPA LTE evo
Throughput Latency
Low cost per Mbyte
3G HSPA HSPAevo LTE
Cost per Mbyte Low Costs
HSPA HSPA LTE evo
Single System to support the worlds communication needs for next decade +
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Migration from 2G systems to next generation communications Public Safety Drivers for LTE
Over 200 Commercially launched LTE networks in 81 countries
The TETRA and Critical Communications Association (TCCA) has an objective of driving the development of Mobile Broadband solutions for the users of Mission Critical and Business Critical mobile communications. Having reviewed existing technologies the TCCA believes that LTE holds the greatest prospect for delivering such solutions. As a result the TCCA intends to work with 3GPP to include the functionality necessary within the LTE standard to meet that objective.
Drivers Fastest data speeds A bigger pipe Field-tested across
the country Global technology
standard Being adopted as a
standard for public safety
1st Non-mission critical voice
Path to Mission Critical Voice
Leverage commercial ecosystem for scale, cost, technology evolution, worldwide interoperability
Roaming local and global roaming with other networks
Over 1000 LTE devices from
100+ suppliers
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How LTE technology compares to todays 3.5G networks ?
* LTE values according to Nokia and Nokia Siemens Network simulations for NGMN performance evaluation report V1.3 (macro cell, full buffer, 500m ISD, pedestrian speed) ** Server near RAN
Latency (Roundtrip delay)**
DSL (~20-50 ms, depending on provider)
GSM/EDGE
HSPA Rel.6
HSPAevo (Rel.8)
LTE
0 20 40 60 80 100 120 140 160 180 200 ms
Average cell throughput (macro cell, 2x20 MHt or equivalent)*
Mbp
s/ce
ll
HSPA R6 HSPAevo (2x2 MIMO/64QAM)
LTE (2x2 MIMO/64QAM)
LTE (4x4 MIMO/64QAM)
Downlink Uplink
70 60 50 40 30 20 10 0
4 carriers, each 2x5 MHz
4 carriers, each 2x5 MHz
1 carriers, 2x20 MHz
1 carriers, 2x20 MHz
VoIP capacity*
HSPA R6 LTE FDD)
70 60 50 40 30 20 10 0
80
Cal
ls/M
hz/c
ell
Downlink Uplink
Max. peak data rate
HSPA R6
2x5MHz
2x5MHz
2x20MHz
2x20MHz
HSPAevo (2x2 MIMO/64QAM)
LTE (2x2 MIMO/64QAM)
LTE (4x4 MIMO/64QAM)
Downlink (uncoded) Uplink (uncoded) Downlink (coded) Uplink (coded)
350
300
250
200
150
100
50
0
Mbp
s
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Why is the LTE experience so good?
Customer experience of network delay
WE NAM MEA LAT CEE APAC 0 ms
100 ms
200 ms
300 ms
400 ms
500 ms
Source: Cisco Analysis of Ookla Speedtest Data, 2011
Mobile network Fixed network
RTT
LTE measurements in a commercial network
20 ms
0 ms
10 ms
30 ms
40 ms
50 ms
Source: Epitiro Ltd.: LTE Real World Performance Study (TeliaSonera)
6am 6pm 6am 6pm 6am 6pm 6pm
RTT
LTEs very fast round-trip response time is even better than many DSL connections
It is really fast in speed and low in delay (something needed of PS applications)
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What is LTE? Long Term Evolution
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TDMA 2G FDMA 2G CDMA 3G OFDMA 4G
f
f
f
t
f
t
f
f
t
f
t
f
Time Division Frequency Division Code Division Frequency Division Orthogonal subcarriers
Radio Evolution 101
User 1 User 2 User 3 User ..
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Key features of LTE State of the art improvements from 3rd Generation systems
Fast Link Adaptation due to channel behavior
Short TTI = 1 ms Transmission time interval
TX RX
Tx Rx MIMO
Channel
DL: OFDMA UL: SC-FDMA
scalable
Up to 64QAM Modulation
(ARQ) Automatic Repeat Request
Rel-8
Advanced Scheduling
Time & Freq.
Robust High Speed Low Latency Scalable
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LTE Radio principles
Power efficient uplink increasing battery lifetime Improved cell edge performance by low peak to average ratio Reduced Terminal complexity
Uplink: SC-FDMA
Enabling peak cell data rates of 173 Mbps DL and 58 Mbps in UL * Scalable bandwidth: 1.4 / 3 / 5 / 10 /15 / 20 MHz also allows deployment
in lower frequency bands (rural coverage, refarming) Short latency: 10 20 ms **
Improved spectral efficiency Reduced interference Very well suited for MIMO
* At 20 MHz bandwidth, FDD, 2 Tx, 2 Rx, DL MIMO, PHY layer gross bit rate ** roundtrip ping delay (server near RAN)
Downlink: OFDMA
Subchannels / Tones (each 15 kHz)
time
1 TTI= 1ms
1 PRB (Physical Resource Block)= 12 Subcarriers = 180 kHz
1 PRB = 2 Slots= 2 * 0.5 ms
User 1User 2User 3User ..
Subchannels / Tones (each 15 kHz)
time
1 TTI= 1ms
1 PRB (Physical Resource Block)= 12 Subcarriers = 180 kHz
1 PRB = 2 Slots= 2 * 0.5 ms
User 1User 2User 3User ..
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Our Key Architectural Concept Flat and Cost effective Mobile Network
GSM/EDGE/
UMTS/HSPA
Access Core Control
WCDMA BTS RNC
IMS HLR/HSS
LTE / SAE
Shift of functionality
2G BTS BSC
MSC MGW
SGSN GGSN
LTE BTS (eNodeB) MME SAE-GW
MGW
Simplified network architecture with open interfaces Decouples network from services and applications (ex Voice, Web, email, etc)
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Meeting Public Safety Needs
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Large new ecosystem created for PS around FirstNet Public Safety Drivers for LTE
Middle Class Tax Relief & Job Creation Act of 2012 Creates 1st National Public Safety network in USA
9/11 attacks in USA create need for national PS network to have interoperable response from multiple agencies
700 MHz D Block assigned for PS
7B USD allocated to fund network buildout
PS provided 1,300+ baseline requirements
LTE chosen as single technology for FirstNET to leverage commercial ecosystem for devices, network, & applications
USA: 2.5 M 1st Responders & 22.6M potential government users
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Overall Evolution of PS Communications
US Dept of Homeland Security
QoS
Reliability & Resiliency
Roaming
Guaranteed Access
Spectrum Efficiency, Capacity, Coverage
Mission Critical Voice
Full Interoperability
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http://www.3gpp.org/Public-Safety
3GPP Third Generation Partnership Project Support of Public Safety Requirements
15-Oct-13
Rel-8 Rel-9
Introduction of LTE High Speed Packet Data Band 14 PS support Voice over LTE (telephony) QoS, Basic Pre-emption Security (128 bit AES)
Precise Location Multimedia Broadcast Svc Public Warning System E9-1-1 Support Cell on Wheels support Self Organizing Network
Rel-10
Increased data throughput Relay Support (fire truck relay to users)
Rel-11
High Power Devices (1.25W)
Rel-12+
Mission Critical Voice Group Call Proximity Services Priority Handling & Preemption
18 2013 Nokia Solutions and Networks. All rights reserved.
Looking a bit deeper i
