Online packet scheduling under adversarial jamming

Tomasz Jurdzinski, Dariusz R. Kowalski, Krzysztof Lorys

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


We consider the problem of scheduling packets of different lengths via a directed communication link prone to jamming errors. Dynamic packet arrivals and errors aremodelled by an adversary. We focus on estimating competitive throughput of online scheduling algorithms. We design an online algorithm for scheduling packets of arbitrary lengths, achieving optimal competitive throughput in (1/3, 1/2] (the exact value depends on packet lengths). Another algorithm we design makes use of additional resources in order to achieve competitive throughput 1, that is, it achieves at least as high throughput as the best schedule without such resources, for any arrival and jamming patterns. More precisely, we show that if the algorithm can run with double speed, i.e., with twice higher frequency, then its competitive throughput is 1. This demonstrates that throughput of the best online fault-tolerant scheduling algorithms scales well with resource augmentation. Finally, we generalize the first of our algorithms to the case of any f ≥ 1 channels and obtain competitive throughput 1/2 in this setting in case packets lengths are pairwise divisible (i.e., any larger is divisible by any smaller).

Original languageEnglish (US)
Title of host publicationApproximation and Online Algorithms - 12th International Workshop, WAOA 2014, Revised Selected Papers
EditorsOla Svensson, Evripidis Bampis
PublisherSpringer Verlag
Number of pages14
ISBN (Print)9783319182629
StatePublished - 2015
Externally publishedYes
Event12th International Workshop on Approximation and Online Algorithms, WAOA 2014 - Wroclaw, Poland
Duration: Sep 11 2014Sep 12 2014

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference12th International Workshop on Approximation and Online Algorithms, WAOA 2014


  • Adversarial jamming
  • Competitive throughput
  • Online algorithms
  • Packet scheduling
  • Resource augmentation

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)


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