IMDEA Networks Institute Publications Repository

Energy-Efficient Network Routing with Discrete Cost Functions

Wang, Lin and Fernández Anta, Antonio and Zhang, Fa and Hou, Chenying and Liu, Zhiyong (2012) Energy-Efficient Network Routing with Discrete Cost Functions. In: The 9th Annual Conference on Theory and Applications of Models of Computation (TAMC 2012), The Turing Year 2012 in China, 16-21 May 2012, Beijing, China.

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Energy consumption is an important issue in the design and use of networks. In this paper, we explore energy savings in networks via a rate adaptation model. This model can be represented by a cost-minimization network routing problem with discrete cost functions. We formulate this problem as an integer program, which is proved to be NP-hard. Then a constant approximation algorithm is developed. In our proposed method, we first transform the program into a continuous-cost network routing problem, and then we approximate the optimal solution by a two-step rounding process. We show by analysis that, for uniform demands, our method provides a constant approximation for the uniform network routing problem with discrete costs. A bicriteria network routing problem is also developed so that a trade-off can be made between energy consumption and network delay. Analytical results for this latter model are also presented.

Item Type: Conference or Workshop Papers (Paper)
Uncontrolled Keywords: network optimization, network routing, approximation
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Antonio Fernandez
Date Deposited: 07 Nov 2012 09:21
Last Modified: 15 Dec 2016 12:20

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