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Extending Voice & Data Coverage with Ease

Explore the challenges of extending voice and data coverage in rural areas. Dive into technology choices, spectrum issues, and infrastructure sharing to enhance rural connectivity. Discover innovative solutions and strategies for efficient coverage expansion in Sri Lanka.

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Extending Voice & Data Coverage with Ease

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  1. FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009) Extending Voice & Data Coverage with Ease R.Thirumurthy, Midas Communication Technologies Pvt. Ltd

  2. Outline • Motivation • Coverage Expansion Issues • Technology • Rural Aspects • Summary

  3. Motivation Technology Choice • Our view on the Potential solution • w.r.t Technology, standardization • & regulation on • Technology Choice • Poor Infrastructure • Sparse Population • Efficiently catering to voice & Data Rural Coverage • Among other issues, key are Rural aspects requirements and Technology choice

  4. Choices in Technology EVDO HSPA Spectrum Issues - Different spectrum and channel sizes WCDMA • Various BWA technologies in offering and in pipeline • Parallel technologies with little in common • Wait & watch approach for investment 802.16e • Aimed at • - High mobility • Dense deployment • Broadband centric 802.16m LTE LTE Advanced

  5. Technology Choice How to live with it? • Air Interface and Spectrum Issues

  6. Technology Choice Protecting CAPEX • Reuse of Transmission, Provisioning and other core infrastructure elements • Unified Architecture • Reuse of Access Systems, insulate CAPEX from changing technologies • Soft BTS

  7. Unified Architecture • Flat Architecture • RRC and RRM moved to BTS • Standard IP interface from BTS to Access Gateway • Standardization on protocol between BTS and Access gateway • Security, QOS, Connection Management, AAA, Mobility etc 802.16e/ LTE/ HSPA.. Access Gw CSN IP Backhaul

  8. Soft BTS • Software BTS • SDR • Re-configurable PHY and MAC • Re-configurable wideband RF • Process .16e, .16m or LTE, LTE-A waveforms

  9. Hurdles in Rural Coverage • Low ARPU • E.g. GSM Voice - $4.5/month and CDMA Voice $2.5/month • Low subscriber density • Lack of Infrastructure • Unavailability of power results in high usage of diesel increasing the OPEX by $300 per month • Environmentally hardened, small footprint, low weight • Backhaul cost Source: TRAI Report 13-Jan-09, Survey by FICCI

  10. Rural - Requirements Services Broadband Data Voice • What do rural areas need? Delivery Media Speed? Terminals? Handsets? < 1 Mbps? > 1 Mbps? > 5 Mbps?

  11. Rural Coverage WiMax to connect CSC, education instt & Health centers Technologies Optimized for rural deployments Initial 3G deployments likely to be voice centric Few HIS + Basic services at Low CAPEX & OPEX Active Infrastructure sharing • What is required? By 2013, 3G Modem Subscriber base will still be significant (22 M) Power Aware BTS WiMax will target Residential desktops, Laptops Source: Survey by FICCI and BDA

  12. Active Infrastructure Sharing Access Gw (Oper-1) Spectrum ? Virtual BTS1 QoS Fairness in Backhaul? • Minimize risk on low ARPU & uncertain market size • Virtual BTS • Virtualization of BTS Resources • Standardized Management Interface Access Gw (Oper-2) Virtual BTS2 Active Backhaul Sharing Virtual BTSn Access Gw (Oper-n) Active BTS Sharing

  13. Power Aware Systems Switch to Backup power Reduce Tx Power maintain coverage 100% 75% Capacity 50% 25% time T • High Mobile users and heavy data users are relatively low • Requirement for basic service like voice and moderate data usage • BTS power intelligence to adopt to different conditions • Reduces the power backup required (e.g. diesel, Battery, Solar panel) Note: Graphical data relative and conceptual

  14. Power Aware Systems - Capacity Tx Rx 100% • Reduce the Power Amp switch-on time • Reduce the coding level (QAM64 –› QAM16 –› QPSK…) • Admission control to prioritize emergency services like voice etc. • LightGSM - Reduce Transmit Power, BCCH channels have higher Error protection, MS would be able to detect BTS. Switch back to normal power on detecting traffic 75% 50% Capacity Management in TDM Systems Note: Graphical data relative and conceptual

  15. Midas’s work in this direction SNAP! Platform Soft BTS supporting Multi technologies (GSM, 802.16e and Enhanced DECT) Support for 400 MHz to 4 GHz in TDD BTS communication to WiMax ASN G/w Scalable Channel Bandwidth (5, 10, 20 MHz) BTS Tower-Top Unit ASN G/w IP Backhaul BTS

  16. corDECT/Enhanced DECT • 1880-1930 MHz • IMT2000 DECT • Uncoordinated use of spectrum • 10 Km coverage • Low power requirement • corDECT/Enhanced DECT for Rural • Wireless DSL • Spectrum available in various countries • Uncoordinated use of spectrum • Provide Voice/FAX/Modem and Broadband Data service, essential for CSC etc. • DECT Roadmap • Meet IMT-Advanced Reqr • OFDMA Support • MIMO Support

  17. corDECT/Enhanced DECT Star Chart Security Dynamic Channel Selection Flat IP Arch Spectrum Efficiency CAPEX Reuse High Voice QoS Low Power Latency Mobility NLOS

  18. Summary • Coverage Expansion Issues • Technology Choice • Air Interface & Spectrum issues • Protecting CAPEX • Rural Expansion • Rural Requirements • Infrastructure Sharing • Power Optimized BTS • Multi Technology POP platforms

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