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An Improved MPH-Based Delay-constrained Steiner Tree Algorithm

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DOI: 10.4236/cn.2011.33015    3,686 Downloads   6,722 Views  

ABSTRACT

In order to optimize cost and decrease complexity with a delay upper bound, the delay-constrained Steiner tree problem is addressed. Base on the new delay-constrained MPH (DCMPH_1) algorithm and through improving on the select path, an improved MPH-based delay-constrained Steiner tree algorithm is presented in this paper. With the new algorithm a destination node can join the existing multicast tree by selecting the path whose cost is the least; if the path’s delay destroys the delay upper bound, the least-cost path which meets the delay upper bound can be constructed through the least-cost path, and then is used to take the place of the least-cost path to join the current multicast tree. By the way, a low-cost multicast spanning tree can be constructed and the delay upper bound isn’t destroyed. Experimental results through simulations show that the new algorithm is superior to DCMPH_1 algorithm in the performance of spanning tree and the space complexity.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

C. Yang and K. Huan, "An Improved MPH-Based Delay-constrained Steiner Tree Algorithm," Communications and Network, Vol. 3 No. 3, 2011, pp. 127-132. doi: 10.4236/cn.2011.33015.

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