Maximum Lifetime Combined Barrier-Coverage of Weak Static Sensors and Strong Mobile Sensors

Donghyun Kim, Wei Wang, Junggab Son, Weili Wu, Wonjun Lee, Alade O. Tokuta

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Recently, the concept of barrier-coverage of wireless sensor network has been introduced for various civilian and military defense applications. This paper studies the problem of how to organize hybrid sensor network, which consists of a number of energy-scarce ground sensors with homogenous initial battery level and energy-plentiful mobile sensors, to maximum the lifetime of barrier-coverage. Two key observations are (a) as the lifetime of each mobile sensor is much longer than that of the static ground sensors, each mobile sensor is capable of contributing multiple sensor barrier formations, and (b) no mobile sensor node can join two hybrid barriers which will be successively used to continuously protect the area of interest due to the moving delay. Based on these, we introduce a new maximum lifetime barrier-coverage problem in hybrid sensor network. We first propose a simple heuristic algorithm by combining existing ideas along with our own. Then, we design another efficient algorithm for the problem and prove that the lifetime of hybrid barrier constructed by this algorithm is at least three times greater than the existing one on average. Our simulation result shows that the second algorithm outperforms the first algorithm at least 33 percent and up to 100 percent.

Original languageEnglish
Pages (from-to)1956-1966
Number of pages11
JournalIEEE Transactions on Mobile Computing
Issue number7
Publication statusPublished - 2017 Jul 1


  • Sensor networks
  • barrier-coverage
  • graph theory
  • hybrid sensor networks
  • maximum lifetime

ASJC Scopus subject areas

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


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