Smart multihop communication for wireless sensor networks

Conference: Smart Systems Integration 2008 - 2nd European Conference & Exhibition on Integration Issues of Miniaturized Systems - MOMS, MOEMS, ICS and Electronic Components
04/09/2008 - 04/10/2008 at Barcelona, Spain

Proceedings: Smart Systems Integration 2008

Pages: 3Language: englishTyp: PDF

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Karakehayov, Zdravko; Andersen, Niels Lervad (University of Southern Denmark, MCI-CPD, Sønderborg, Denmark)

Sensor networks are made up of a large number of small sensing nodes which cooperatively perform complex tasks. The interaction between the nodes is based on wireless communication. Since the energy is a scarce and usually non-renewable resource, the functionality of sensor networks must be viewed from low-power perspective. Medium access control (MAC) mechanism has a significant impact on the energy efficiency. Currently available MAC protocols for wireless sensor networks can be broken down into two major types: contention based and scheduling based. While under contention-based protocols nodes compete among each other for channel access, scheduling-based schemes rely on prearranged collisionfree links between nodes. In this paper we discuss a novel MAC protocol for wireless sensor networks, ALSMAC. The protocol achieves good scalability and collision avoidance by utilizing contention-based advertising slots mapped to scheduled-based transmission slots.