Tried and Tested Best Practices for the Implementation of LTE
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This document discusses best practices for implementing LTE networks. It identifies that noise management and ensuring sufficient signal-to-noise ratio (SNR) at cell edges is important for delivering high data rates across the network. It provides five key strategies for LTE implementation: noise management, RF sector control, network modernization, backhaul, and in-building solutions. It also discusses techniques for reducing interference like antenna selection, sector sculpting, and network optimization techniques.
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Tried and Tested Best Practices for the Implementation of LTE
- 1. This document is offered compliments of BSP Media Group. www.bspmediagroup.com All rights reserved.
- 2. Tried and Tested Best Practices for the Implementation of LTE Philip Sorrells – VP Strategic Marketing - Wireless PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 1
- 3. • 100M subscribers – 5.9B to go!! • Acceptance Cycle Time • Global Evolution PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 2
- 4. What Limits LTE??? • Noise!!! • Increase radiated power • Small handover areas (less than 20% design goal) • Cell Edge Required SNIR for Full Data Rate Close to the radio users experience better data rates. The challenge is managing noise so users at the CELL EDGE have a Great Experience (Rel-99) PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 3
- 5. Five Key Strategies • Noise Management • RF Sector Control • Network Modernization • Backhaul • In Building and Venue PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 4
- 6. Considerations Impacting Planning •Signal Strength vs SNR •Grid lines tend to devolve •Ideal Azimuths may vary Weight and Wind Loading Complexity Reliability •Performance Specs •Age 5 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 5
- 7. 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 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 4G – Data 6
- 8. Find and Eliminate Interference Co-channel Interference PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc Adjacent channel Interference 7
- 9. Avoid PIM (Passive Intermodulation) • “Unwanted” signals created by “nonlinearities” • • High Quality Equipment • Careful Frequency Planning Clear Sky -123 dBm (-166 dBc) Person nearby with phone, keys, adapters, badge -94 dBm (-137 dBc) • Considerate Installation Point At Fence -102 dBm (-145 dBc) PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 8
- 10. Interference Reduction - Antenna Selection Initial 90 Deg Panel* Increased Cell Overlap reduces the SCINR (Quality) of the system and thus throughput experience by the end user! Initial 65 Deg Panel* Technology GSM 9-21 Depended on # of BCCH/TCH channels available for use UMTS/CDMA Example 65 Deg LP* Permitted Cell Overlap 3-4 Soft Handover (Active Set Size) LTE 2-3 1 Ideally (No Soft Handover) Comments * Typical horizontal BW antenna patterns from initial deployments of GSM/UMTS PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 9
- 11. Network optimization Reducing site-to-site interference Downtilt ( °) 8 7 6 5 Downtilt ( °) 0 1 2 3 0 1 2 3 4 4 • Boresite Pointing Adjustment PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 5 6 7 8 • Beam Tilting 10
- 12. Sector Sculpting • Faster Roll off = Less interference Sector Split • More Sectors – Better Density • Extends value of existing cells Six-Sector Site • Fast and easy deployment 5-Beam models available in 698–894 MHz or 1710–2170 MHz 5-BEAM PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 9-BEAM 2x9-Beam model available in 1710–2170 MHz 11
- 13. The Challenge – Overcoming Complexity Network Modernization • Multiple spectrum bands • Multiple Technologies • Protecting your current system • Future Ready • Time to market PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 12
- 14. 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 PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 13
- 15. Co Siting– Multiband combining Wideband DualPol® BSA Twin Diplexer 2100 UltraBand™ BSA Quad Triplexer 1800 1900 AWS Value proposition GSM + UMTS Zoning friendly Reduced wind load Essential on slim profile monopoles Can save CAPEX PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 2300 2x4 LTE 850 700 14
- 16. Co Siting - RRH Radio Independent Approach • Pre-assembled • Standardized • Flexible • Maintainable • Separate Optimized Antenna PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 15
- 17. A Success Story PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 16
- 18. Five Key Strategies • Noise Management • RF Sector Control • Network Modernization • Backhaul • In Building and Venue PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 17
- 19. The shape of things to come… PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 18
- 20. Understanding the RF Path Understanding the RF Path eBook—NEW Now available for the iPad®, iPhone®, Android or Amazon Kindle Fire®. Access the RF Path ebook today and enjoy: Nearly 200 pages of insight on network concepts, and installation techniques • • • • • • • • Best Installation Practices Antenna Application Theory Best Co-Siting Practices Transmission Systems Passive Intermod Prevention Backhaul Systems Reliability Distributed Antenna Systems Available in app or digital format PRIVATE AND CONFIDENTIAL © 2013 CommScope, Inc 19