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MDG: MEASUREMENT-DRIVEN GUIDELINES FOR 802.11 WLAN DESIGN

MDG: MEASUREMENT-DRIVEN GUIDELINES FOR 802.11 WLAN DESIGN. Ioannis Broustis , Konstantina Papagiannaki , Srikanth V. Krishnamurthy, Michalis Faloutsos , Vivek Mhatre ACM MOBICOM 2007. Goal: Improve WLAN network performance. Three functions to improve network performance in dense WLANs

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MDG: MEASUREMENT-DRIVEN GUIDELINES FOR 802.11 WLAN DESIGN

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  1. MDG: MEASUREMENT-DRIVEN GUIDELINES FOR 802.11 WLAN DESIGN IoannisBroustis, KonstantinaPapagiannaki, Srikanth V. Krishnamurthy, MichalisFaloutsos, VivekMhatre ACM MOBICOM 2007

  2. Goal: Improve WLAN network performance • Three functions to improve network performance in dense WLANs • Frequency selection • Provides spatial separation between interfering APs • User association • Provides load balancing among APs • Power control • APs shrink their cells to facilitate higher spatial reuse of spectrum

  3. AP AP Frequency Selection • Neighbor Access Points (APs) select different frequencies in order to mitigate interference from each other Cell of B Cell of A Channel 6 Channel 11 B A AP AP Channel 6 Channel 6 Inter-cell Contention: A cannot transmit because B is transmitting

  4. User Association • Users select less-loaded Access Points (APs) in order to get more throughput A B AP AP C

  5. Power Control • APs shrink their overlapping cells in order to reduce interference and improve spatial reuse A B AP AP

  6. Problem statement • Which are the functions that should be applied in a specific scenario? • In what sequence should they be applied? High level objective: to maximize a fair notion of aggregate network throughput

  7. Previous Work • Most studies have tried to optimize one of these functions • No studies on the interdependencies between allthree functions • A. Mishra, V. Shrivastava, D. Agarwal, S. Banerjee. Distributed Channel Management in Uncoordinated Wireless Environments. MOBICOM 2006. • N. Ahmed, S. Keshav. SMARTA: A Self-Managing Architecture for Thin Access Points. CoNEXT 2006. • K. Sundaresan, K. Papagiannaki. The Need for Cross-Layer Information in Access Point Selection Algorithms. IMC 2006. • A. Mishra, V. Brik, S. Banerjee, A. Srinivasan, W. Arbaugh. A Client-Driven Approach for Channel Management in Wireless LANs. INFOCOM 2006. • A. Kumar, V. Kumar. Optimal Association of Stations and APs in an IEEE 802.11 WLAN. NCC 2005. • T. Korakis, O. Ercetin, S. V. Krishnamurthy, L. Tassiulas, S. Tripathi. Link Quality Based Association Mechanism in IEEE 802.11h Compliant Wireless LANs. RAWNET 2005. • B. Leung, K. Kim. Frequency Assignment for IEEE 802.11 Wireless Networks. VTC 2003. • Y. Bejerano, S. Han, L. Li. Fairness and Load Balancing in Wireless LANs Using Association Control. MOBICOM 2004.

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