6533b861fe1ef96bd12c4e59

RESEARCH PRODUCT

Realizing airtime allocations in multi-hop Wi-Fi networks: A stability and convergence study with testbed evaluation

Domenico GarlisiMatthew J. MellottViolet R. SyrotiukIlenia TinnirelloCharles J. Colbourn

subject

Settore ING-INF/03 - TelecomunicazioniComputer Networks and CommunicationsComputer sciencebusiness.industryWireless networkad-hoc networks.ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSTestbedLocal area network020206 networking & telecommunications02 engineering and technologyHop (networking)multi-hop network0202 electrical engineering electronic engineering information engineeringResource allocation020201 artificial intelligence & image processingbusinessWireless networkComputer network

description

Abstract REACT is a distributed resource allocation protocol used to negotiate a max–min allocation of airtime for multi-hop ad hoc wireless networks. Two approaches are proposed for a node to realize its REACT allocation in a contention-based MAC protocol. This is achieved by tuning its contention window to a value that corresponds to its allocation. Only a change in the allocation, due to a change in local traffic requirements or local network views, results in re-tuning. The approaches for tuning are implemented in commercial Wi-Fi devices and their stability and convergence are studied experimentally in the w-iLab.t wireless network testbed. These properties are also studied analytically to support the experimental results. In addition, REACT is extended to support airtime reservations for multi-hop flows. With a reservation in place, multi-hop TCP flows exhibit improved performance metrics when running over REACT than when running over 802.11 DCF in the w-iLab.t testbed.

yearjournalcountryeditionlanguage
2019-09-01Computer Communications
https://doi.org/10.1016/j.comcom.2019.07.006