An Enhanced Reservation Based Medium Access Control for Voice over Wireless Mesh Networks

Voice over IEEE 802.11 becomes much more cost effective when deployed over IEEE 802.11-based Wireless Mesh Network (WMN) due to the license-free backhaul wireless links. However, medium access control (MAC) based on IEEE 802.11 traditional random backoff protocols that are suitable for throughput-sensitive data services cannot satisfy the performance of voice services. Therefore, in this paper we propose an improved MAC based on medium reservations, called EMDA. EMDA improves significantly the optional Mesh Deterministic Access (MDA) MAC, to provide a much higher voice call capacity thanks to voice packet aggregation feasibility and much less MDA signaling overhead. EMDA is based on a per-node reservation of a block of contiguous transmission opportunities that are properly dimensioned. Moreover, we further improve the near-deterministic access of EMDA by using short jamming periods just before these reservations. Extensive simulation results show that our proposed MAC enlarges the voice capacity and uniformly distribute it over the WMN. It also provide a better performance in guaranteeing hard delay constraints, lower jitter and lower packet losses compared to other MAC.

[1]  Nico Bayer,et al.  Application-aware scheduling for VoIP in Wireless Mesh Networks , 2010, Comput. Networks.

[2]  Frank Kelly,et al.  Notes on effective bandwidths , 1994 .

[3]  Weihua Zhuang,et al.  A collision-free MAC scheme for multimedia wireless mesh backbone , 2009, IEEE Trans. Wirel. Commun..

[4]  Rudy Lauwereins,et al.  Beamforming techniques for enabling spatial-reuse in MCCA 802.11s networks , 2011, EURASIP J. Wirel. Commun. Netw..

[5]  Hung-Yu Wei,et al.  On Admission of VoIP Calls Over Wireless Mesh Network , 2006, 2006 IEEE International Conference on Communications.

[6]  Weihua Zhuang,et al.  QoS-driven MAC-layer resource allocation for wireless mesh networks with non-altruistic node cooperation and service differentiation , 2009, IEEE Transactions on Wireless Communications.

[7]  Artem N. Krasilov,et al.  Interference, Even with MCCA Channel Access Method in IEEE 802.11s Mesh Networks , 2011, 2011 IEEE Eighth International Conference on Mobile Ad-Hoc and Sensor Systems.

[8]  Luciano Lenzini,et al.  Scheduling and Dynamic Relocation for IEEE 802.11s Mesh Deterministic Access , 2008, 2008 5th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks.

[9]  Choong Seon Hong,et al.  eMCCA: An enhanced mesh coordinated channel access mechanism for IEEE 802.11s wireless mesh networks , 2011, Journal of Communications and Networks.

[10]  Rauf Izmailov,et al.  Performance of VoIP in a 802.11 Wireless Mesh Network , 2006, Proceedings IEEE INFOCOM 2006. 25TH IEEE International Conference on Computer Communications.

[11]  Abdelhakim Hafid,et al.  Distributed Admission Control in Wireless Mesh Networks: Models, Algorithms, and Evaluation , 2010, IEEE Transactions on Vehicular Technology.

[12]  Guido R. Hiertz,et al.  IEEE 802.11s - Mesh Deterministic Access , 2008, 2008 14th European Wireless Conference.

[13]  Abdelhakim Hafid,et al.  An Enhanced Reservation-Based Medium Access Control with Scheduling and Admission Control for Voice over Wireless Mesh Networks , 2010, 2010 IEEE Global Telecommunications Conference GLOBECOM 2010.

[14]  Luciano Lenzini,et al.  A distributed Delay-balancing Slot Allocation algorithm for 802.11s Mesh Coordinated Channel Access under dynamic traffic conditions , 2010, The 7th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS 2010).

[15]  Xiang-Yang Li,et al.  Efficient interference-aware TDMA link scheduling for static wireless networks , 2006, MobiCom '06.

[16]  Vincent W. S. Wong,et al.  Joint Channel Allocation, Interface Assignment and MAC Design for Multi-Channel Wireless Mesh Networks , 2007, IEEE INFOCOM 2007 - 26th IEEE International Conference on Computer Communications.

[17]  Ian F. Akyildiz,et al.  Wireless mesh networks: a survey , 2005, Comput. Networks.

[18]  Paul T. Brandy Model for Generating On‐Off Speech Patterns in Two‐Way Conversation , 1969 .

[19]  Dipankar Raychaudhuri,et al.  Available bandwidth estimation and admission control for QoS routing in wireless mesh networks , 2008, Comput. Commun..

[20]  Dimitrios Makrakis,et al.  MARE: An Efficient Reservation-Based MAC Protocol for IEEE 802.11s Mesh Networks , 2009, 2009 Second International Conference on Advances in Mesh Networks.

[21]  Weihua Zhuang,et al.  Novel packet-level resource allocation with effective QoS provisioning for wireless mesh networks , 2009, IEEE Trans. Wirel. Commun..

[22]  Izhak Rubin,et al.  Integrated Power Controlled Rate Adaptation and Medium Access Control in Wireless Mesh Networks , 2010, IEEE Transactions on Wireless Communications.