Review: A comprehensive survey on scheduler for VoIP over WLAN

  • Authors:
  • Kashif Nisar;Angela Amphawan;Suhaidi Hassan;Nurul I. Sarkar

  • Affiliations:
  • InterNetWorks Research Laboratory, School of Computing, College of Arts and Sciences, Universiti Utara Malaysia, 06010 UUM Sintok, Malaysia and School of Computing & Mathematical Sciences, Aucklan ...;InterNetWorks Research Laboratory, School of Computing, College of Arts and Sciences, Universiti Utara Malaysia, 06010 UUM Sintok, Malaysia;InterNetWorks Research Laboratory, School of Computing, College of Arts and Sciences, Universiti Utara Malaysia, 06010 UUM Sintok, Malaysia;School of Computing & Mathematical Sciences, Auckland University of Technology (AUT), New Zealand

  • Venue:
  • Journal of Network and Computer Applications
  • Year:
  • 2013

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Abstract

Voice over Internet Protocol (VoIP) technology has observed rapid growth in the world of telecommunications. VoIP offers high-rate voice services at low cost with good flexibility, typically in a Wireless Local Area Network (WLAN). In a voice conversation, each client works either as a sender or a receiver depending on the direction of traffic flow over the network. A VoIP technologically requires high throughput, less packet loss and a high fairness index over the network. The packets of VoIP streaming may experience drops because of competition among the different kinds of traffic flow over the network. A VoIP application is also sensitive to delays and requires voice packets to arrive on time from the sender to the receiver without any delay over a WLAN. To date, scheduling of VoIP traffic is still an unresolved problem. The objectives of this survey paper are to discuss fundamental principles of VoIP-related schedulers and identify current scheduler issues. This survey paper also identifies the importance of the scheduling techniques over WLANs. Related research work for real-time applications specifically for VoIP will also be highlighted.