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

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Presentation transcript:

Final Comments on TPC and DFS Proposal (01/169r2) 5/5/2019 doc.: IEEE 802.11-00/xxx May 2001 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 Sunghyun Choi, Philips Research

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

May 2001 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

May 2001 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

May 2001 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