Networks are monitored in order to ensure that the system operates within desirable parameters. The increasing complexity of networks and services provided by them increases this need for monitoring. Monitoring consists of measuring properties of the network, and of inferring an aggregate predicate from these measurements. Conducting such monitoring introduces traffic overhead that may reduce t...

Please cite this article in press as: S.-G. Yoon et (2011), doi:10.1016/j.comnet.2011.02.019 Exploiting the multiuser diversity in wireless networks has a fundamental tradeoff between throughput and energy saving. To balance the tradeoff, we reconsider the opportunistic scheduling in the aspect of energy saving, and propose a new energy-efficient opportunistic (EEFO) scheduling. Our goal is to ...

In this paper, we propose an approach to saving power by more aggressively using sleep mode. The sleep duration is estimated by measuring the on-line traffic information, i.e. slot utilization. A considerable amount of power can be saved by using the approach. Our approach does not use any additional signaling channel, nor does it need any overhead in the involved protocol. The algorithm is rea...

This article presents the design process behind the specification of a behaviour change intervention method to promote energy saving. The amount of energy used for food preparation is highly influenced by people’s behaviours. A usercentred design approach based on scenario analysis was applied to provide understanding of context of use and specification of user requirements. This knowledge was ...

We study the performance of uplink transmission in a large-scale (massive) MIMO system, where all the transmitters have single antennas and the receiver (base station) has a large number of antennas. Specifically, we analyze achievable degrees of freedom of the system without assuming channel state information at the receiver. Also, we quantify the amount of power saving that is possible with i...

Your life-saving drug, which was supposed to look clear before injection, has got large particles floating in it. The can of paint you bought to spruce up your living room is caked, and no amount of stirring makes it homogeneous again. And, adding insult to injury, the Béarnaise sauce for the broccoli is lumpy and your tap water is hazy. What do all these problems have in common? The answer is ...

We consider an implementation of a recursive model-based active-set trust-region method for solving bound-constrained nonlinear non-convex optimization problems without derivatives using the technique of self-correcting geometry proposed in [24]. Considering an active-set method in modelbased optimization creates the opportunity of saving a substantial amount of function evaluations when mainta...

Predicting speech recognition performance in place of expensive recognition experiments is a very useful approach for the research and development of speech recognition systems. In this paper, we propose a method to predict speech recognition performance when using new test data and/or a new acoustic model. Performance prediction tests showed that the proposed method can accurately predict reco...

Typically, large-scale optimistic parallel simulations will spend 90% or more of the total execution time forward processing events and very little time executing rollbacks. In fact, it was recently shown that a large-scale TCP model consisting of over 1 million nodes will execute without generating any rollbacks (i.e., perfect optimistic execution is achieved). The major cost involved in forwa...

With its growing capacity and density, off-chip memory consumes a considerable amount of energy in the mobile system, so there are strong demands for energy-efficient techniques. Memory manufacturers provide several operating modes with different power requirements. To explore these modes for energy saving, the memory has to switch among those modes frequently. However, the mode transition also...