Impairment- and Splitting-Aware Cloud-Ready Multicast Provisioning in Elastic Optical Networks

Zuqing Zhu, Xiahe Liu, Yixiang Wang, Wei Lu, Long Gong, Shui Yu, Nirwan Ansari

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


It is known that multicast provisioning is important for supporting cloud-based applications, and as the traffics from these applications are increasing quickly, we may rely on optical networks to realize high-throughput multicast. Meanwhile, the flexible-grid elastic optical networks (EONs) achieve agile access to the massive bandwidth in optical fibers, and hence can provision variable bandwidths to adapt to the dynamic demands from the cloud-based applications. In this paper, we consider all-optical multicast in EONs in a practical manner and focus on designing impairment- and splitting-aware multicast provisioning schemes. We first study the procedure of adaptive modulation selection for a light-tree, and point out that the multicast scheme in EONs is fundamentally different from that in the fixed-grid wavelength-division multiplexing networks. Then, we formulate the problem of impairment- and splitting-aware routing, modulation and spectrum assignment (ISa-RMSA) for all-optical multicast in EONs and analyze its hardness. Next, we analyze the advantages brought by the flexibility of routing structures and discuss the ISa-RMSA schemes based on light-trees and light-forests. This paper suggests that for ISa-RMSA, the light-forest-based approach can use less bandwidth than the light-tree-based one, while still satisfying the quality of transmission requirement. Therefore, we establish the minimum light-forest problem for optimizing a light-forest in ISa-RMSA. Finally, we design several time-efficient ISa-RMSA algorithms, and prove that one of them can solve the minimum light-forest problem with a fixed approximation ratio.

Original languageEnglish (US)
Article number7731159
Pages (from-to)1220-1234
Number of pages15
JournalIEEE/ACM Transactions on Networking
Issue number2
StatePublished - Apr 2017

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


  • Elastic optical networks (EONs)
  • all-optical multicast
  • approximation algorithm
  • impairment
  • modulation and spectrum assignments (RMSA)
  • routing


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