MEERA: cross-layer methodology for energy efficient resource allocation in wireless networks

摘要: In many portable devices, wireless network interfaces consume upwards of 30% scarce system energy. Reducing the transceiver's power consumption to extend lifetime has therefore become a design goal. Our work is targeted at this goal and based on following two observations. First, conventional energy management approaches have focused independently minimizing fixed cost (by shutdown) scalable costs leveraging, for example, modulation, code-rate transmission power). These present tradeoff. For lower modulation rates minimize variable component, but shortens sleep duration thereby increasing consumption. Second, in order meet quality service (QoS) timeliness requirements multiple users, we need determine what extent each may scale. Therefore, propose two-phase methodology that resolves sleep-scaling tradeoff across physical, communications link layers time schedules nodes runtime with near optimal energy-efficient configurations solution space. As result, are able achieve very low run-time overheads. applied case study delivering guaranteed QoS users MPEG-4 video over slow-fading channel. By exploiting controllable parameters actual RF components modified 802.11 medium access controller, increased by factor 3-to-10 comparison techniques.