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Vo P.L.,Kyung Hee University | Le T.A.,Kyung Hee University | Le T.A.,Thudaumot University | Lee S.,Kyung Hee University | And 3 more authors.
Journal of Parallel and Distributed Computing | Year: 2014

The canonical multi-path network utility maximization (NUM) model which is extended directly from the single-path NUM has been studied widely in the literature. Most of the previous approaches do not specify the case of subflows on paths with different characteristics. Moreover, the transport protocol derived from the canonical multi-path NUM exhibits flappiness in the subflows because of the non-strictly convexity of the optimization problem. This paper introduces a modified multi-path NUM model and proposes a novel approach to overcome the mentioned issues. Using Jensen's inequality, the multi-path NUM is approximated to a strictly convex and separable problem which can be solved efficiently by dual-based decomposition method. The algorithm successively solving a sequence of approximation problems is proven to converge at the global optimum of the original problem. Moreover, considering the separable form of the approximation utility and the dual-based nature of the proposed algorithm, the reverse engineering frameworks of the current TCPs are used to develop a series of multi-path TCPs that are compatible with corresponding regular single-path TCPs. © 2013 Elsevier Inc. All rights reserved. Source

Vo P.L.,Kyung Hee University | Le T.A.,Kyung Hee University | Le T.A.,Thu Dau Mot University | Lee S.,Kyung Hee University | And 3 more authors.
Computing | Year: 2014

In current networks, end-user devices are usually equipped with several network interfaces. The design of a multipath protocol that can cooperate with current single-path transport protocols is an interesting research field. Most previous works on multipath network utility maximization (NUM) lead to rate-based control protocols. Moreover, these studies do not model a case in which paths from a source may have different characteristics. Thus, these approaches are difficult to deploy to the Internet. In this paper, we introduce a multipath NUM model for a network with both multipath and single-path users. The proposed algorithm converges to a global solution to the multipath NUM. Based on the mathematical framework, we develop a multipath TCP called mReno. Analysis and simulations indicate that mReno is completely compatible with TCP Reno and achieves load-balance, fairness, and performance improvement targets. © 2013 Springer-Verlag Wien. Source

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