Abstract-This paper assesses the communication between smart-meters and aggregators as secondary users that transmit their data over the primary uplink channel. We assume: directional antennas are employed in the meter-aggregator link, secondary users transmit with limited power, meters' transmissions are randomized to avoid packet collisions, and an outage constraint for the secondary links' to guarantee their robustness. Therefore, the interference caused by the secondary users in the primary can be neglected. Conversely, the secondary users still experience interference from mobile users of the primary network, whose positions and traffic activity are unknown. Our goal is to study sampling-communication strategies for transmitting the average power demand of a household so the signal can be reconstructed by the aggregator with low deviation. Our results indicate that an event-based scheme based on energy packets can outperform the usual time-based, periodic, sampling.

Abstract-This paper analyzes a scenario where the distribution system operator needs to estimate whether the average power demand in a given period is above a predetermined threshold using a 1-bit memoryless scheme. Specifically, individual smartmeters periodically monitor the average power demand of their respective households to inform the system operator if it is above a predetermined level using only a 1-bit signal. The communication link between the meters and the operator occurs in two hops and is modeled as binary symmetric channels. The first hop connects individual smart meters to their corresponding aggregator, while the second connects different aggregators to the system operator. A decision about the power demand also happens in two stages based on the received information bit. We consider here three decision rules: AND, OR and MAJORITY. Our analytical results indicate the circumstances (i.e. how frequent the meters experience the consumption above the defined threshold) and the design setting (i.e. decision rules) that a low error probability can be attained. We illustrate our approach with numerical results from actual daily consumptions from 12 households and 3 aggregators.

Abstract-This paper assesses the communication between smart-meters and aggregators as secondary users that transmit their data over the primary uplink channel. We assume: directional antennas are employed in the meter-aggregator link, secondary users transmit with limited power, meters' transmissions are randomized to avoid packet collisions, and an outage constraint for the secondary links' to guarantee their robustness. Therefore, the interference caused by the secondary users in the primary can be neglected. Conversely, the secondary users still experience interference from mobile users of the primary network, whose positions and traffic activity are unknown. Our goal is to study sampling-communication strategies for transmitting the average power demand of a household so the signal can be reconstructed by the aggregator with low deviation. Our results indicate that an event-based scheme based on energy packets can outperform the usual time-based, periodic, sampling.

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