lte: addressing the challenges
TRANSCRIPT
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Stephen Bowker, CTO, AIRCOM International
LTE: Addressing the Challenges
James Middleton, Managing Editor, telecoms.com
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LTE is being adopted NOW!
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2010 2011 2012 2013 2014+
Global LTE launch forecasts
Informa T&M
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The early adopters
Informa T&M
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Getting it right
Spectrum Consolidation Cost effective rollout
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Stephen Bowker, CTO, AIRCOM International
LTE: Addressing the Challenges
James Middleton, Managing Editor, telecoms.com
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Addressing the ChallengesStephen Bowker, CTOAIRCOM International1 February 2012
http://www.3gpp.org/Release-9-Completion -
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Introduction to AIRCOM InternationalAIRCOM is a leading independent provider of end-to-end software products and
consulting services designed to plan, manage and optimise mobile networks
Global market leader in mobile Network Planning and Performance Management (PM) solutions
Recognized Industry Expert across all major radio and core technologies including GSM, CDMA,
UMTS, WiMAX and LTE
350+ mobile operator customers in 135+ countries including product and service deployments
with all of the top 20 largest global mobile operators
Software Consulting Services
Core Capabilities
Strategy and Technology Planning
Network Design and Planning Spectrum Re-farming Solutions
Vendor Management
Roll-out Management
Optimisation Services
Network operations outsourcing
Core Capabilities
Market Leading Radio Planning Tool - ASSET
Highly scalable, flexible Mobile Network PerformanceManagement OPTIMA
Integrated RAN/Backhaul Planning and
Optimisation/Dimensioning capabilities
Multi-Technology / Multi-Vendor tools, already
Interfacing to all leading equipment vendors across
2G, 3G and LTE today
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LTE has arrived and is accelerating fast!
By 31 December 2011, 49 LTE networks had
launched commercially in 29 countries
By the end of CES 2012, Las Vegas (13 Jan) 269
LTE devices from 57 manufacturers, including 48
smartphones, 18 tablets and numerous data
devices had been launched
Operators are already refarming spectrum from
other technologies e.g. 1800MHz for LTE.
LTE networks have implemented interim voice
solutions as networks/devices support Circuit-
Switched FallBack or dual radios
In some cases (e.g. KT Korea) 2G services are
being completely shutdown as LTE is being rolled
out
Status of LTE Ecosystem Report - 20 Jan 2012
Source: GSA GSM mobile Suppliers Associationhttp://www.gsacom.com
http://www.gsa.com/http://www.gsa.com/ -
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LTE Some of the Key Challenges Biggest delay to rollout of LTE (especially in locations like Western Europe) is
the government releasing, licensing, auctioning of spectrum
Spectrum clearance very important for LTE, plus managing interference to
adjacent bands (such as TV broadcast), GPS/SatNav etc....
New technologies with new software leads to extensive testing requirements,
inter-operability testing and bug resolution Managing the constant change in the network due to frequent software
upgrades, technology innovations from vendors
High Bandwidth Backhaul is required to all LTE sites e.g. 200Mbps+ for a 3
Sector site, or 1Gb Ethernet. Requires End-to-End mindset
Test equipment is expensive, requires highly skilled engineers. In addition all
L2/L3 messages are not currently available in drive test tools
Advanced Antenna Systems required for higher throughput giving more
complex planning, building and RF safety requirements
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Plan and Design
Design Objectives
Design Basis
Model Calibration
Radio + Backhaul Design
Measurement test processes
Business Planning (HSPA+ vs. LTE)
Migration strategies
Spectrum Planning
Infrastructure Sharing
LTE trials evaluation
LTE Strategy
LTE Strategic Decision Making
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LTE Field Testing, Trials and Vendor Evaluation
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Spectrum Re-farming for LTE
Re-farming of existing 850, 900, 1700,1800, 1900 & 2100 MHz bands for LTE
AIRCOM are already re-farming for our
LTE customers who are deploying in
1800 MHz band
Coverage 2X than at 2.6 GHz
Ideal for Single RAN deployment with
GSM
1800MHz widely available in Europe &
APAC
Little regulatory issues - technology
independent band
AIRCOM can help:
The AIQ Solution addresses all of the above issues, with a particular
emphasis for 2012 on spectrum re-farming
Recent projects in Europe, MEA and APAC
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Example: EGSM Interference in 900MHz Band
UMTS Example Signal from DL ARFCN 1001 is
present on ARFCN 1000
No measurable influence on
ARFCN 999
Impact on a LTE System? 20dB+ SINR is required for
QAM-64 modulation
Entire Resource Block on edge of
LTE limited to QPSK/QAM-16 or
disabled LTE deployed in 5MHz Spectrum
embedded in GSM band could
lose 8% capacity
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Case Study Refarming for LTE 1800
Middle-East Operator (MEA)
1800 MHZ
Re-farming 10 MHz of Spectrum for deployment of LTE
KPIs restore after few days of re-farming conducted
Multivendor environment
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LTE Typical Throughput and Round Trip
First commercial LTE network was
launched in Sweden (Dec 09)
The Nordics & Scandinavia are aninteresting area to observe for newmobile technologies
Numbers shown below are consistentwith other networks AIRCOM hasbenchmarked globally
Typically 4-6x (under load) currentUMTS/HSPA speeds and less than 50%Round Trip Times
Publically available LTE Throughput DataSource: http://www.bredbandskollen.se/
UL Kbps DL Kbps RTT(ms) Samples Not Accept Acceptable Good
Use 10-80 Mbits/s 4GSelect City or Alla
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LTE Example Drive Test MIMO Impacts
Example drive test comparing throughput
when in MIMO 2x2 Open-Loop SpatialMultiplexing (Rank 1) with Transmit DiversityMode/No MIMO (Rank 0)
Throughput Average (Example)Rank 0 = 9395 Kbps
Rank 1 =13446 Kbpsshowing a 43% improvement
When closed loop MIMO devices (UEs)become available we would expect this toimprove to ~70%
Introducing 4x4 or 4x2 MIMO we wouldexpect a ~60% improvement over 2x2MIMO
Samples
CW0/CW1 QPSK 16QAM 64QAM
QPSK 19724 0 0
16QAM 2 11861 2
64QAM 1 0 6795
Single-antenna port; port 0 samples # 1915
Transmit diversity samples # 12813
Open-loop spatial multiplexing samples # 37492
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Radio Access Technology Planning
Inter-Technology Radio Planning requires
tools to support multiple technologiessimultaneously in same project Support for Shared Antenna Systems
Interim Voice Services such as CSFB aredependent on having 2G/3G coverage co-incidental with LTE
Inter-RAT multi-technology features suchas: simulated/live traffic capture,neighbour planning, PCI planning
Joint planning of Tracking Areas in LTEand Location Areas in 2G and 3G
Automation, including Live update ofconfiguration parameters from networkkeeps planning tools in sync
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ENTERPRISE WEB SERVICES (EWS)LIVE PLAN SERVER
LIVE NETWORK CONFIGURATION DATA FROM VENDOR OMCS
........
VENDOR-1/OMC-1 VENDOR-2/OMC-2 VENDOR-3/OMC-3 VENDOR-N/OMC-N
CLIENTS
INVENTORY SITE DATABASE
ENGINEERING DATA
READ/COMPARE
UPDATE
CREATE
DELETE
FULLYAUTOMATED
Evolving Configurations = Live Planning
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Carried Traffic Analysis for LTE (CTA)
Integration between ASSET (RF planning tool) and CONNECT (backhaul planningtool)
Technology evolution => LTE higher network elements are supported (SAEGW, MME)
Ability to create the LTE logical interfaces (S1-SAE, S1-MME, X2)
Realization of the LTE mesh topology (an eNodeB can belong to more than one SAEGWor MME)
Inter-technology operation
Actual and simulated trafficfrom different sources (GSM,UMTS, LTE sites) is createdand carried over
TransmissionBackhaul
CoreNetwork
Air Interface
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LTE: Performance Management Challenge
To successfully monitor LTE a PM Toolmust:
Reliably load performance data and scale(data produced per eNodeB)
Load data quickly (minutes latency)especially during cluster testing
Handle frequent software upgrades
Store multi-vendor, multi-technology PMdata on a single database
Have powerful KPIs and reporting
Drill down/up/across on data to find rootcauses to problems
Automatic performance alarms andthreshold crossing alerts
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SON Introduction Organising or Optimising?
SONSelf-Organising Networks
SON consists of: Self-Configuration, Self-Optimisation, Self-Healing functions
Self-Configuration
Distributed, vendor specific algorithms that automatically configure eNodeB as they aredeployed (Self-Establishment of a new eNodeB)
Includes functions such as software download, self configuration of fundamental functions asa eNodeB come on-air e.g. Automatic Configuration of LTE physical channels
Self-Optimisation Automatic Neighbour Relation management
Handover parameter and reselection parameter with Mobility Robustness algorithms, andother functions such as load balancing and control channel power settings
Mobility parameters to optimise coverage and capacity, which are direct trade-off with eachother.
Self-Healing Focussed around detecting outages, and automating the processed of compensating for those
outages through changes to parameters in the network (plus recovery algorithms)
Requires a centralised SON function rather than base station specific
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SON Gaining the Trust of Engineering
Itf-NItf-N
OMC
OMC
Network Manager
OMC
SONEngine
SON_EngineAlgorithms
Vendor SON
Presentation
T0 Data
Global Policy
Policy Control Policy Control
Policy Perf. Policy Perf.
CentralisedVendor 1
SON
DistributedVendor 1
SON
CentralisedVendor 2
SON
DistributedVendor 2
SON
NetworkMonitoring
SON ENGINEI-View Framework
VendorSON
Monitorin
g
N
etworkConfiguration
VendorSON
AlgorithmSelectionandTuning
1 2 3 4
Automation Sequence
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Summary
Since the first commercial launch on LTE in December 2009, the technology has come
of age with over 50 networks out there today
Real measured throughputs have met expectations even under load, with peak rates
up-to 40-50Mbps and mean around 15-20 Mbps (BW 10Mhz)
Typically 60-70% of all problems associated with LTE rollout are deployment errors
focus on getting the basics right to save a lot of pain
Its essential to plan and monitor across multiple radio access technologies (2G-3G-
LTE) especially where interim voice services such as Circuit-Switched FallBack (CSFB)
are implemented
LTE data rates create additional challenges on backhaul planning, core dimensioning
and test equipment
Self-Organising Networks features are beginning to roll out into LTE networks today
(ANR), careful monitoring, control and co-ordination of algorithms will be key to
maintaining quality and optimising OPEX
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Thank you for attending today
Telecoms.com are hosting another webinar focussed on SON in conjunction
with both AIRCOM and Analysys Mason on Wed 15 Feb @ 11am & 4pm GMT
Register at Telecoms.com forCalculating the true costs savings of SONs
Meet the AIRCOM Team at:
Mobile World Congress
Barcelona 27 Feb-1 Mar Stand 1A23
CTIA AmericasNew Orleans 8 -10 May Hall F, Booth No. 5568
LTE World SummitBarcelona 23-24 May Stand 68
For more information visit our website at: www.aircominternational.com
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