Topology Management for Sensor Networks: Exploiting Latency and Density [Conference Paper]

NESL Technical Report #: 2002-6-3


Abstract: In wireless sensor networks, energy efficiency is crucial to achieve satisfactory network lifetime. In order to reduce the energy consumption of a node significantly, its radio needs to be turned off. Yet, some nodes have to participate in multi-hop packet forwarding. We tackle this issue by exploiting two degrees of freedom in topology management: the path setup latency and the network density. First, we propose a new technique called Sparse Topology and Energy Management (STEM), which aggressively puts nodes to sleep. It provides a method to wake up nodes only when they need to forward data, where latency is traded off for energy savings. Second, STEM integrates efficiently with existing approaches that leverage the fact that nearby nodes can be equivalent for traffic forwarding. In this case, an increased network density results in more energy savings. We analyze a hybrid scheme, which takes advantage of both setup latency and network density to increase the nodes' lifetime. Our results show improvements o f nearly two orders of magnitude compared to sensor networks without topology management.

Publication Forum: International Symposium on Mobile Ad Hoc Networking & Computing (MobiHoc'02)

Volume: 1

Number: 1

Page (Start): 135

Page (End): 145

Page (Count): 11

Date: 2002-06-16

Place: Lausanne, Switzerland

Publisher: ACM Press

Public Document?: Yes

Document category: Conference Paper