RT Journal Article
T1 SOLOR: Self-Optimizing WLANs With Legacy-Compatible Opportunistic Relays
A1 García-Saavedra, Andrés
A1 Rengarajan, Balaji
A1 Serrano Yáñez-Mingot, Pablo
A1 Camps-Mur, Daniel
A1 Costa-Pérez, Xavier
AB Current IEEE 802.11 WLANs suffer from the well-known rate anomaly problem, which can drastically reduce network performance. Opportunistic relaying can address this problem, but three major considerations, typically considered separately by prior work, need to be taken into account for an efficient deployment in real-world systems: 1) relaying could imply increased power consumption, and nodes might be heterogeneous, both in power source (e.g., battery-powered versus socket-powered) and power consumption profile; 2) similarly, nodes in the network are expected to have heterogeneous throughput needs and preferences in terms of the throughput versus energy consumption tradeoff; and 3) any proposed solution should be backwards-compatible, given the large number of legacy 802.11 devices already present in existing networks. In this paper, we propose a novel framework, Self-Optimizing, Legacy-Compatible Opportunistic Relaying (SOLOR), which jointly takes into account the above considerations and greatly improves network performance even in systems comprised mostly of vanilla nodes and legacy access points. SOLOR jointly optimizes the topology of the network, i.e., which are the nodes associated to each relay-capable node; and the relay schedules, i.e., how the relays split time between the downstream nodes they relay for and the upstream flow to access points. Our results, obtained for a large variety of scenarios and different node preferences, illustrate the significant gains achieved by our approach. Specifically, SOLOR greatly improves network throughput performance (more than doubling it) and power consumption (up to 75% reduction) even in systems comprised mostly of vanilla nodes and legacy access points. Its feasibility is demonstrated through testbed experimentation in a realistic deployment.
PB IEEE
SN 1063-6692
YR 2015
FD 2015-08-01
LK https://hdl.handle.net/10016/36229
UL https://hdl.handle.net/10016/36229
LA eng
NO This work has been supported by the European Community's Seventh Framework Programme (FP7-ICT-2009- 5) under grant agreement no. 257263 (FLAVIA project).
DS e-Archivo
RD 27 jul. 2024