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http://dx.doi.org/10.6109/jkiice.2008.12.2.254

Performance Analysis of Mesh WLANs based on IEEE 802.11 protocols  

Lee, Kye-Sang (동의대학교 공과대학 정보통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.12, no.2, 2008 , pp. 254-259 More about this Journal
Abstract
Mesh WLANs, which consist of wireless mesh routers connecting each other in a mesh topology and self-operate after their autoconfiguration, have several advantages in convenience, swiftness and flexibility of deployment and operation over existing WLANs the expansions of which are done by connecting the APs with wires. However, many technical issues still remain to be solved. Among them, network performance degradations due to the interference between the adjacent hops in multi-hop mesh WLANs, and the reusability of the existing wireless network protocols are critical problems to be answered. This work evaluates the VoIP support performance of IEEE 802.11a/g-based mesh WLANs with multiple wireless interfaces with simulations. The results show that there exit an unfairness in VoIP packet delay performances among mobile routers located at different hops, and that although the capacity of the admitted calls can be increased by increasing the size of voice packet payload it is far less than the expected one. This suggests that the existing 802.11 MAC protocols have their limitation when applied in mesh networks and their enhancement or even a newer one nay be required.
Keywords
IEEE 802.11;
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  • Reference
1 V. Jain et al., "A Cross Layer MAC with Explicit Synchronization through Intelligent Feedback for Multiple Beam Antennas," Proc. IEEE GLOBECOM, pp 3196-3200, 2005
2 S. Liese, D. Wu, and P. Mohapatra, "Experimental Characterization of an 802.11b Wireless Mesh Network," UC Davis Comp. Sci. Dept. tech. rep
3 ITU-T Recommendation G.729, "Coding of Speech at 8 kbits Using Conjugate-Structure Algebraic-Code-Excited Linear Prediction (CS-ACELP)," Mar., 1996
4 "Hyacinth: An IEEE 802.11-based Multi-channel Wireless Network," http://www.ecsl. cs.sunysb.edu/multichannel
5 ITU-T G.114, "One-Way Transmission Time," 1996
6 I. F. Akyldiz and et. al., "A Survey on Wireless Mesh Networks," IEEE Radio Communications., pp S23-S30, Sep., 2005
7 P. Kyasanur and N. H. Vaidya, "Routing and Interface Assignment in Multi-Channel Multi-Interface Wireless Networks," IEEE WCNC, New Orleans, LA, pp2051-2056, Mar. 2005
8 S. M. Faccin and et. al., "Mesh WLAN Networks: Concept and System Design," IEEE Wireless Mag., pp 10-17, Apr., 2006
9 K. Ramachandran et al., "Interference-Aware Channel Assignment in Multi-Radio Wireless Mesh Networks," IEEE INFOCOM, pp 1-12, 2006