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Final Comments on TPC and DFS Proposal (01/169r2)

Final Comments on TPC and DFS Proposal (01/169r2). S. Choi 1 , P. Ecclesine 4 , S. Gray 2 , M. Kasslin 2 , S. Mangold 3 , A. Myles 4 , A. Soomro 1 , D. Skellern 4 Philips Research 1 , Nokia Research Center 2 , ComNets Aachen University 3 and Cisco 4. Proposal Goals.

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Final Comments on TPC and DFS Proposal (01/169r2)

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  1. Final Comments on TPC and DFS Proposal (01/169r2) S. Choi1, P. Ecclesine4, S. Gray2, M. Kasslin2, S. Mangold3, A. Myles4, A. Soomro1, D. Skellern4 Philips Research1, Nokia Research Center2, ComNets Aachen University3 and Cisco4 Aachen Univ, Cisco, Nokia and Philips

  2. Proposal Goals • Meet ERC Requirements (Whatever they may be?) • Enhance IEEE802.11a operation by allowing • Interference reduction • Power savings Aachen Univ, Cisco, Nokia and Philips

  3. Summary for DFS • New management messages are added to allow STAs to measure • RSSI (current frequency channel) • RSSRI (new frequency channel) • BSS, QBSS, CCA busy fraction, CCA busy interval, CCA busy duration and Foreign PLCP Headers • Measurement reports • Allow AP to determine if IEEE802.11h, HiperLAN/2 or other sources of interference exist in the frequency channel • Channels with satellite channels or radar channels can be distinguished from WLAN systems • Allows flexibility for AP vendors to do proprietary measurements and make decisions concerning frequency channel changes Aachen Univ, Cisco, Nokia and Philips

  4. Summary for TPC • Service Field transmit power field allows easy estimation of path loss • Power capabilities are conveyed by a STA during Association • BSS power ceiling is conveyed in Beacon thus, 3 dB backoff is guaranteed upon AP command • DCF • Suggested maximum power level for STAs • Hidden node detection suggested in IEEE 802.11-01/219r0, which will: • alllow STAs determine power autonomously, if desired • allow APs determine an appropriate suggested max power level • PCF • STAs decide power autonomously • Improve battery life • Improve QoS • IBSS problem solved by 3 dB permanent backoff of power Aachen Univ, Cisco, Nokia and Philips

  5. Late Development • The proposal in IEEE 802.11-01/169r2 has resolved issues for a merger with IEEE802.11-01/217 • Additional elements for identifying BSSs residing on different frequency channels • Ability in PCF and HCF for a receiving entity to indicate suggested power changes to sending entity Aachen Univ, Cisco, Nokia and Philips

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