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A Contribution Towards Harmonization of IEEE 802.11a, HiperLAN2 and MMAC

This paper discusses the objective of providing superior Quality of Service for voice, video, and data applications. It highlights the features and disadvantages of HiperLAN2 and IEEE802.11a MAC protocols and proposes a harmonized approach to combine their beneficial features. The paper also explores other features such as hardware abstraction layer and transmission security.

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A Contribution Towards Harmonization of IEEE 802.11a, HiperLAN2 and MMAC

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  1. A Contribution Towards Harmonization of IEEE802.11a, HiperLAN2 and MMAC D. Connors H. Saam Magis Networks hsaam@magisnetworks.com D. Conner, Magis Networks

  2. Objectives • Providing uncompromising Quality of Service support • voice, video and computer data applications • Cost effectiveness • Avoiding un-necessary complexity • Focus on application support in the local area (home and office environments) • Wide area mobility not an application requirement D. Conner, Magis Networks

  3. HiperLAN2, A High Level View • Main Features • Synchronous MAC • QoS support for isochronous traffic • Centralized control • Connection oriented • DFS and TPC • Disadvantages • RLC Complexity due to wide-area mobility • Complex AP D. Conner, Magis Networks

  4. 802.11a MAC, A High Level View • Features • Asynchronous MAC • Distributed control • Connectionless • Out-of-band ARQ signaling (fast ARQ) • Disadvantages • No QoS support for isochronous traffic • No security • Lack of robustness D. Conner, Magis Networks

  5. A Harmonized Approach • Adopt the H2 MAC framework • Synchronous MAC • Centralized control • Incorporate beneficial features of 802.11 • Fast ARQ • Larger packet size (less overhead) • Reduced L2-L3 interface complexity • Distribute some bandwidth management functions • Connection-oriented at Layer 2 D. Conner, Magis Networks

  6. Other Features • Hardware Abstraction Layer • supports a variety of hardware interfaces • Transmission security • protecting sensitive media over the air D. Conner, Magis Networks

  7. Conclusion • No extensive legacy infrastructure exists today for either 802.11a or H2 • Hybrid approaches are expensive and not justified based on existing market realities • A balanced and selective approach to 11a/H2 harmonization is more efficient and supports true universality • MMAC requirements need to be understood and facrtored in. • See white paper for more info. D. Conner, Magis Networks

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