Distributed reservation-based QoS in Ad Hoc networks with internet access connectivity

Ali Hamidian, Ulf Körner

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


Real-time applications introduce new requirements on wireless networks and impose quality thresholds on parameters like delay, jitter, throughput, and packet loss in order to run smoothly. This paper addresses this issue by presenting a MAC scheme that offers real-time applications the opportunity to reserve transmission time based on their QoS requirements for contention-free medium access. Our scheme, which is called EDCA with Resource Reservation (EDCA/RR), operates in a fully distributed manner, is compatible with IEEE 802.11, and provides both prioritized and parameterized QoS. In this study, we have extended EDCA/RR to handle reservation collisions and, through extensive simulations, we show that our proposal can handle multiple reservations as well as the hidden station problem while providing QoS guarantees. We compare EDCA/RR with EDCA and our results show that, as the traffic in the network increases, EDCA/RR succeeds providing the required service to QoS-demanding applications whereas EDCA fails in this task; especially if there are hidden stations. In addition, when the medium is lossy we show that, not only does EDCA/RR give better service to real-time traffic, but also to contending non-real-time traffic.
Original languageEnglish
Title of host publication2009 21ST INTERNATIONAL TELETRAFFIC CONGRESS (ITC 21)
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)978-1-4244-4744-2
Publication statusPublished - 2009
Event21st International Teletraffic Congress (ITC 21) - Paris, France
Duration: 0001 Jan 2 → …


Conference21st International Teletraffic Congress (ITC 21)
Period0001/01/02 → …

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering

Free keywords

  • QoS guarantees
  • resource reservation
  • ad hoc networks
  • EDCA
  • IEEE 802.11e
  • QoS
  • wireless mesh networks
  • Internet access


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