Joint Placement of Controllers and Gateways in SDN-Enabled 5G-Satellite Integrated Network

Jiajia Liu, Yongpeng Shi, Lei Zhao, Yurui Cao, Wen Sun, Nei Kato

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)


Leveraging the concept of software-defined network (SDN), the integration of terrestrial 5G and satellite networks brings us lots of benefits. The placement problem of controllers and satellite gateways is of fundamental importance for design of such SDN-enabled integrated network, especially, for the network reliability and latency, since different placement schemes would produce various network performances. To the best of our knowledge, it is an entirely new problem. Toward this end, in this paper, we first explore the satellite gateway placement problem to obtain the minimum average latency. A simulated annealing based approximate solution (SAA), is developed for this problem, which is able to achieve a near-optimal latency. Based on the analysis of latency, we further investigate a more challenging problem, i.e., the joint placement of controllers and gateways, for the maximum network reliability while satisfying the latency constraint. A simulated annealing and clustering hybrid algorithm (SACA) is proposed to solve this problem. Extensive experiments based on real world online network topologies have been conducted and as validated by our numerical results, enumeration algorithms are able to produce optimal results but having extremely long running time, while SAA and SACA can achieve approximate optimal performances with much lower computational complexity.

Original languageEnglish
Pages (from-to)221-232
Number of pages12
JournalIEEE Journal on Selected Areas in Communications
Issue number2
Publication statusPublished - 2018 Feb


  • 5G-satellite integrated network
  • controller placement
  • joint placement
  • satellite gateway placement

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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