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INFOCOM
2011
IEEE

Delay constrained minimum energy broadcast in cooperative wireless networks

9 years 2 months ago
Delay constrained minimum energy broadcast in cooperative wireless networks
—We formulate the problem of delay constrained energy-efficient broadcast in cooperative multihop wireless networks. We show that this important problem is not only NPcomplete, but also o(log(n)) inapproximable. We derive approximation results and an analytical lower-bound for this problem. We break this NP hard problem into three parts: ordering, scheduling and power control. We show that when the ordering is given, the joint scheduling and power-control problem can be solved in polynomial time by a novel algorithm that combines dynamic programming and linear programming to yield the minimum energy broadcast for a given delay constraint. We further show empirically that this algorithm used in conjunction with an ordering derived heuristically using the Dijkstra’s shortest path algorithm yields near-optimal performance in typical settings. We use our algorithm to study numerically the trade-off between delay and power-efficiency in cooperative broadcast and compare the performanc...
Marjan A. Baghaie, Bhaskar Krishnamachari
Added 30 Aug 2011
Updated 30 Aug 2011
Type Journal
Year 2011
Where INFOCOM
Authors Marjan A. Baghaie, Bhaskar Krishnamachari
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