tried and tested best practices for the implementation of lte
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1 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Philip Sorrells – VP Strategic Marketing - Wireless
Tried and Tested Best Practices for the
Implementation of LTE
2 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
• 100M subscribers – 5.9B
to go!!
• Acceptance Cycle Time
• Global Evolution
3 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
What Limits LTE???
• Noise!!!
• Increase radiated power
• Small handover areas (less
than 20% design goal)
• Cell Edge
Required SNIR for Full Data Rate
(Rel-99)
Close to the radio users
experience better data rates.
The challenge is managing noise
so users at the CELL EDGE have
a Great Experience
4 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Five Key Strategies
• Noise Management
• RF Sector Control
• Network Modernization
• Backhaul
• In Building and Venue
5 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Considerations Impacting Planning
•Signal Strength vs SNR
•Grid lines tend to devolve
•Ideal Azimuths may vary
•Performance Specs
•Age
5
Weight and
Wind
Loading
Complexity
Reliability
6 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Shannon’s Law
The focus of future technology enhancements should be on improving system performance aspects that improve and maximize the experienced SNRs in the system.
Peter Rysavy of Rysavy Research,
Data Capabilities: GPRS to
HSDPA and Beyond, 3G Americas,
September 2005
2G – Voice
4G – Data
7 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Co-channel Interference Adjacent channel Interference
Find and Eliminate Interference
8 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Avoid PIM (Passive Intermodulation)
• “Unwanted” signals created by “nonlinearities”
• • High Quality Equipment
• Careful Frequency Planning
• Considerate Installation
Clear Sky
-123 dBm (-166 dBc)
Person nearby with phone,
keys, adapters, badge
-94 dBm (-137 dBc)
Point At Fence
-102 dBm (-145 dBc)
9 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Initial 90 Deg Panel*
Initial 65 Deg Panel*
Example 65 Deg LP*
Interference Reduction - Antenna Selection
9 TTS Proprietary &
Confidential - 2013
* Typical horizontal BW antenna
patterns from initial deployments
of GSM/UMTS
Technology
Permitted
Cell
Overlap
Comments
GSM 9-21 Depended on # of BCCH/TCH channels available for
use
UMTS/CDMA 3-4 Soft Handover (Active Set Size)
LTE 2-3 1 Ideally (No Soft Handover)
Increased Cell Overlap reduces the SCINR (Quality) of the system
and thus throughput experience by the end user!
10 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
• Boresite Pointing Adjustment • Beam Tilting
Network optimization
Reducing site-to-site interference
0 1
2 3
4 5
6 7 8
Downtilt ( °) 0
1
2 3
4 5
6 7 8
Downtilt ( °)
11 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Sector Sculpting
• Faster Roll off = Less interference
• More Sectors – Better Density
• Extends value of existing cells
• Fast and easy deployment
5-Beam models available in
698–894 MHz or 1710–2170 MHz
2x9-Beam model available in
1710–2170 MHz
5-BEAM 9-BEAM
Sector Split
Six-Sector Site
12 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
The Challenge – Overcoming Complexity
Network Modernization
• Multiple spectrum bands
• Multiple Technologies
• Protecting your current system
• Future Ready
• Time to market
13 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Co Siting - Ideally, any solution should……
• Minimize weight, wind load on
already straining towers and roofs
• Provide the performance required to
justify the investment
• Reduce risks of “craft’ related
installation errors
• Be fast and easy to upgrade and
maintain
• Be repeatable and scalable
14 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Co Siting– Multiband combining
2100
Twin
Diplexer
Wideband
DualPol®
BSA
1800
GSM
+ UMTS
1900
850
AWS
2300
700
Quad
Triplexer UltraBand™
BSA
Value proposition
Zoning friendly
Reduced wind load
Essential on slim
profile monopoles
Can save CAPEX
2 x 4
LTE
15 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Co Siting - RRH
• Pre-assembled
• Standardized
• Flexible
• Maintainable
• Separate Optimized Antenna
Radio Independent Approach
16 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
A Success Story
17 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
Five Key Strategies
• Noise Management
• RF Sector Control
• Network Modernization
• Backhaul
• In Building and Venue
18 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
The shape of things to come…
19 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc
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