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Extending Voice & Data Coverage with Ease

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

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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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