Poster Abstract: If You Have Time, Save Energy with Pull

TL;DR

This paper compares push and pull data collection methods in wireless sensor networks, demonstrating that pull can significantly save energy if latency is acceptable, by transforming existing protocols and testing on a real network.

Contribution

It introduces a method to convert push protocols into pull protocols and empirically evaluates their energy efficiency in sensor networks.

Findings

Pull reduces energy consumption compared to push.

Long latency is acceptable for energy savings.

Transforming protocols enables easy adoption of pull approach.

Abstract

We analyze push and pull for data collection in wireless sensor networks. Most applications to date use the traditional push approach, where nodes transmit sensed data immedi- ately to the sink. Using a pull approach, nodes store the data in their local flash memory, and only engage in commu- nication during dedicated collection phases. We show how one can transform an existing push-based collection protocol into a pull-based one, and compare the power consumption of both approaches on a 35-node testbed. Our results show that substantial energy gains are possible with pull, provided that the application can tolerate a long latency.