Abstract
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 uninformed stations that lie outside the transmission range of both the transmitter and the receiver 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. 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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
IEEE Std 802.11-2007 Part11: wireless LAN medium access control (MAC) and physical layer (PHY) specifications, IEEE (2007)
Hiertz GR, Habetha J (2003) A new MAC Protocol for a wireless multihop broadband system beyond IEEE 802.11. In: Proc. Wireless World Research Forum, Zurich, Switzerland
IEEE P802.11s/D1.07 Part11: wireless Medium Access Control (MAC) and Physical Layer (PHY) specifications—Amendment: Mesh Networking, IEEE (2007)
Carlson E, Prehofer C, Bettstetter C, Wolisz A (2006) A distributed end-to-end reservation protocol for IEEE 802.11-based wireless mesh networks. Journal on Selected Areas in Communications (JSAC), Special Issue on Multi-Hop Wireless Mesh Networks, vol. 24, no. 11
Hamidian A, Körner U (2006) An enhancement to the IEEE 802.11e EDCA providing QoS guarantees. Telecommun Syst 31(no. 2–3)
Hamidian A, Körner U, Nilsson A (2005) Performance of internet access solutions in mobile ad hoc networks. Lect Notes Comput Sci (LNCS) 3427:189–201
McCanne S, Floyd S. The Network Simulator—ns-2. Available at: http://www.isi.edu/nsnam/index.php/User_Information, 2010
Wiethölter S, Emmelmann M, Hoene C, Wolisz A (2006) TKN EDCA Model for ns-2. Telecommunication Networks Group, Technische Universität Berlin, Tech. Rep. TKN-06-003
Moreton M. IEEE 802.11e patch for ns-2. Original download location is offline: http://cvs.sourceforge.net/viewcvs.py/ns2-wlanpatch/patch802_11/, 2008
William J, Robinson T (2005) An analytical model for the service delay distribution of IEEE 802.11e enhanced distributed channel access. Master’s thesis, Simon Fraser University, Vancouver
Wallerich J (2001) Design and implementation of a WWW Workload Generator for the NS-2 Network Simulator. Master’s thesis, Saarland University, Saarbrucken, Germany
ITU-T Recommendation G.711—Pulse Code Modulation (PCM) of Voice Frequencies, ITU-T (1988)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Körner, U., Hamidian, A., Pioro, M. et al. A distributed MAC scheme to achieve QoS in ad hoc networks. Ann. Telecommun. 66, 491–500 (2011). https://doi.org/10.1007/s12243-010-0209-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12243-010-0209-8