Rate vs. buffer size: greedy information gathering on the line
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Localized spanner construction for ad hoc networks with variable transmission range
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Rate vs. buffer size--greedy information gathering on the line
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This paper considers the problem of broadcasting and information gathering in wireless ad-hoc networks, i.e. in wireless networks without any infrastructure in addition to the mobile hosts. Broadcasting is the problem of sending a packet from a source node in the network to all other nodes in the network. Information gathering is the problem of sending one packet each from a subset of the nodes to a single sink node in the network. Most of the proposed theoretical wireless network models oversimplify wireless communication properties. We will use a model that takes into account that nodes have different transmission and interference ranges, and we propose algorithms in this model that achieve a high time and work-efficiency. We present algorithms for broadcasting a single or multiple message(s), and for information gathering. Our algorithms have the advantage that they are very simple and self-stabilizing, and would therefore even work in a dynamic environment. Also, our algorithms require only a constant amount of storage at any host. Thus, our algorithms can be used in wireless systems with very simple devices, such as sensors.