Balagangadhar G. Bathula

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— In this paper we study the energy consumption in optical networks. We propose a cluster based architecture for minimizing the energy consumed in transparent optical networks. The network topology is partitioned as disjoint clusters and nodes in the clusters adopt sleep cycles. Using anycast routing, we obtain a trade-off between the energy consumption and(More)
— In this paper we discuss the effect of physical impairments on manycasting service over the optical burst-switched (OBS) networks. Signal quality degradation in manycast networks is an important issue and it can occur due to fiber attenuation, splitter switch and amplified spontaneous noise in EDFA. These physical layer impairments causes the signal(More)
In this paper we discuss new energy efficient paradigms for optical networks. With the increasing number of high bandwidth applications, devices used in backbone networks such as optical networks increase. Energy consumption of optical networks is an important issue that has to be addressed. In this work we propose novel routing algorithms for decreasing(More)
Many distributed applications require a group of destinations to be coordinated with a single source. Multicasting is a communication paradigm to implement these distributed applications. However in multicasting, if at least one of the members in the group cannot satisfy the service requirement of the application, the multicast request is said to be(More)
—This paper presents an energy saving technique for optical burst switched networks that reduces energy consumption without significantly degrading the quality of service (QoS) and the connectivity of the network. We propose a distributed algorithm using anycasting an communication paradigm, where the wavelength routed nodes (WRNs) adopt a sleep mode(More)
We discuss the effect of physical impairments on manycasting service over optical burst-switched (OBS) networks. Signal quality degradation in manycast networks is an important issue and it can occur due to fiber attenuation, splitter switch, and amplified spontaneous noise in EDFA. These physical layer impairments causes the signal quality to be weak at(More)
In this paper we discuss the performance of physical-layer impairment-aware anycast communication over transparent optical networks. High-bandwidth applications, such as grid computing over optical networks will benefit from using anycast requests. From the simulation results we observe that the proposed anycast routing algorithms can significantly decrease(More)
Links in an IP network are unidirectional but currently are routed over bidirectional optical circuits with identical A → Z and Z → A capacities. Potentially there could be savings if the two directions of an optical circuit could be treated independently. In this study of possible savings, we have quantified the asymmetry of traffic on a(More)
—In this work we propose anycast routing methods to improve the performance of reconfigurable WDM networks under the variations in the IP traffic. We first investigate anycast communication via impairment-aware anycast routing (IAAR); our simulation results show significant improvement in the blocking probability. We also investigate the proposed load-aware(More)
Many next-generation distributed applications, such as grid computing, require a single source to communicate with a group of destinations. Traditionally, such applications are implemented using multicast communication. A typical multicast session requires creating the shortest-path tree to a fixed number of destinations. The fundamental issue in(More)