Intertwined Medium Access Scheduling of Upstream and Downstream Traffic in Wireless Sensor Networks
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Date
2013-12-25
Authors
Bagaa, Miloud
Younis, Mohamed
Djenouri, Djamel
Badache, Nadjib
Journal Title
Journal ISSN
Volume Title
Publisher
CERIST
Abstract
In wireless sensor networks, the sensor data are often aggregated en-route to the base-station
in order to eliminate redundancy and conserve the network resources. The base-station not only
acts as a destination for the upstream data traffic, but it also configures the network by transmit-
ting commands downstream to nodes. The data delivery latency is a critical performance metric
in time-sensitive applications and is considered by a number of data aggregation schemes in the
literature. However, to the best of our knowledge, no solution has considered the scheduling of
downstream packets, originated from the base-station, in conjunction with upstream traffic. This
paper fills such a gap and proposes MASAUD, which intertwines the medium access schedule of
upstream and downstream traffic in order to reuse time slots in a non-conflicting manner and
reduce delay. MASAUD can be integrated with any scheme for data aggregation scheduling. The
simulation confirms the effectiveness of MASAUD.
Description
Keywords
Wireless sensor network , Data aggregation , Medium access scheduling