The Politecast Communication Primitive for Low-Power Wireless

Lundén, Marcus and Dunkels, Adam (2011) The Politecast Communication Primitive for Low-Power Wireless. ACM SIGCOMM Computer Communications Review, 41 (2). pp. 32-37. ISSN 0146-4833

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In low-power wireless networks, nodes need to duty cycle their radio transceivers to achieve a long system lifetime. Counter-intuitively, in such networks broadcast becomes expensive in terms of energy and bandwidth since all neighbors must be woken up to receive broadcast messages. We argue that there is a class of traffic for which broadcast is overkill: periodic redundant transmissions of semi-static information that is already known to all neighbors, such as neighbor and router advertisements. Our experiments show that such traffic can account for as much as 20% of the network power consumption. We argue that this calls for a new communication primitive and present politecast, a communication primitive that allows messages to be sent without explicitly waking neighbors up. We have built two systems based on politecast: a low-power wireless mobile toy and a full-scale low-power wireless network deployment in an art gallery and our experimental results show that politecast can provide up to a four-fold lifetime improvement over broadcast.

Item Type:Article
ID Code:4149
Deposited By:Adam Dunkels
Deposited On:14 Apr 2011 10:24
Last Modified:27 Dec 2011 10:53

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