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Keywords: Multicast routing Quality of Service Multi-constrained problem Steiner tree Ant colony algorithm a b s t r a c t QoS multicast routing is a non-linear combinatorial optimization problem. It tries to find a multicast routing tree with minimal cost that can satisfy constraints such as bandwidth, delay, and delay jitter. This problem is NP-complete.(More)
IP multicast faces a serious state scalability problem when there are large numbers of groups in the network. Aggregated Multicast has been proposed as a novel solution to solve this problem, in which multiple groups shared one aggregated tree, so as to reduce the multicast forwarding states. In this paper, we propose a Ant Colony Optimization Algorithm for(More)
Large-scale deployment of multicast applications is limited by the number of states that are set in routers for multicast groups. As a new approach to multicast state reduction, aggregated multicast forces multiple multicast groups sharing a common distribution tree. An ant colony optimization algorithm to aggregated multicast is proposed. Inspired by bin(More)
Energy saving in the ICT equipments has been an urgent problem recently. Although the average utilization of network is less than 40% most of the time, its energy consumption is almost the same as peak-hour's. In order to minimize energy consumption and improve resource utilization, we aggregate traffic into a network subset and turn off the remaining(More)
The energy cost is one of the major concerns for the cloud providers. Virtual machine placement has been demonstrated as an effective method for energy saving. In addition to constraints caused by the physical machine resources such as CPU and memory (PM-constraints), the constraints caused by the network resource such as bandwidth (Net-constraints) are(More)
With the widespread of internet deployment and the increase of the users, energy consumption in wired network such as in the data center network, backbone computer network, financial network and so on, has become the main topic concerned in the industry and academic filed. However, energy efficiency is not an easy problem in wired network owing to the(More)
Software Defined Network (SDN) has been envisioned as the next generation network infrastructure, which simplify network management by decoupling the control plane and data plane. It is becoming the leading technology behind many traffic engineering solutions, since it allows a central controller to globally plan the paths of the flows. However, Ternary(More)