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Power saving trade-offs in delay/disruptive tolerant networks
Trullols Cruces, Óscar; Morillo Pozo, Julián David; Barceló Ordinas, José María; García Vidal, Jorge
Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. CNDS - Xarxes de Computadors i Sistemes Distribuïts
Wireless nodes such as smart-phones in which the WiFi wireless card is continuously on, consume battery energy in just a few hours. Moreover, in many scenarios, an always-on wireless card is useless because there is often no need for transmission and/or reception. This fact is exacerbated in Delay/Disruptive Tolerant Network (DTN) environments, in which nodes exchange Delay Tolerant Objects (DTO) when they meet. Power Saving Management (PSM) techniques enable the lifetime of the nodes to be extended. This paper analyses the trade-offs that appear when wireless nodes periodically turn off the wireless card in order to save battery in DTN environments. The paper shows the conditions in which a node can switch off the battery without impacting the peer-to-peer contact probability, and those in which this contact probability is decreased. For example, it is shown that node lifetime can be doubled while keeping the peer-to-peer contact probability equal to one. But, further increase of the node lifetime quickly decreases peer-to-peer contact probability. Finally, the impact of power savings in DTO dissemination time is also analyzed.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Telemàtica i xarxes d'ordinadors
Computer networks -- Management
Wireless LAN
Xarxes de comunicacions -- Gestió
Xarxes d'àrea local sense fils (Xarxes d'ordinadors)
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
IEEE Press. Institute of Electrical and Electronics Engineers
         

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