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HTSG Requirements – Scope and Purpose

HTSG Requirements – Scope and Purpose. Chris Ware, S é bastien Simoens, Amitava Ghosh , Karine Gosse Motorola chris.ware@motorola.com. Background. Market expectations exist for continual significant increase in WLAN speed and performance and thus renewed product success

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HTSG Requirements – Scope and Purpose

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  1. HTSGRequirements – Scope and Purpose Chris Ware, Sébastien Simoens, Amitava Ghosh, Karine Gosse Motorola chris.ware@motorola.com C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  2. Background • Market expectations exist for continual significant increase in WLAN speed and performance and thus renewed product success • 802.11a represents a 1st generation solution for high data rate WLANs • Legacy behavior will limit attainable performance • Low power operation • Capacity / peak throughput / range • QoS • Incremental enhancements to 802.11a/g will limit the capabilities improvement achieved, and may miss market requirements in the medium to long term • Will also result in market fragmentation • Only one option: • Make Significant improvements through introduction of new, scalable technologies C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  3. Drivers • In order to ensure continuing WLAN market expansion and product life extension, the second generation standard needs to be carefully designed in terms of: • Optimized cost / power / capacity / performance envelope • Backward compatibility or coexistence with first generation systems • Support of new applications as they emerge over time C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  4. HTSG Proposed Purpose To define PHY and Medium Access Control protocol that can be gracefully deployed in the 5 GHz band and support: • 100-200Mbps for raw peak user rate, together with higher effective cell throughput (70-140Mbps) • low bit rate applications (increased voice capacity) • flexible tradeoff between power, capacity and performance. C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  5. HTSG Requirements Proposal (2/2) C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  6. HTSG Requirements Proposal (1/2) C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  7. HTSG Technical Avenues • OFDM with higher number of sub-carriers and higher order QAM • Space-time coding techniques • e.g. 2 x 2 MIMO • New channel coding techniques • e.g. low constraint length turbo-codes, • Hybrid ARQ • Incremental Redundancy (IR) and Chase Combining • MAC efficiency improvement • e.g. TDD/TDMA incl. backward compatibility • Reducing overhead in the MAC will only be part of the story C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

  8. Conclusion • Imperative that we make big strides in developing the 802.11 standard • Small incremental changes will have only limited improvements in capability • New technology can allow a paradigm shift in applications C. Ware, S. Simoens, A. Ghosh, K. Gosse, Motorola

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