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The authors consider the problem of finding "Backbones" in multi-hop wireless networks. The backbone provides end-to-end connectivity, allowing non-backbone nodes to save energy since they do not have to route non-local data or participate in the routing protocol. Ideally, such a backbone would be small, consist primarily of high capacity nodes, and remain connected even when nodes are mobile or fail. Unfortunately, it is often infeasible to construct a backbone that has all of these properties; e.g., a small optimal backbone is often too sparse to handle node failures or high mobility.
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