An Improved Channel Access Mechanism For IEEE 802.11 WLAN
| dc.contributor.author | Ahsan, Imamul | |
| dc.contributor.author | Sristy, Sabbir Ahmed | |
| dc.date.accessioned | 2020-10-19T17:21:42Z | |
| dc.date.available | 2020-10-19T17:21:42Z | |
| dc.date.issued | 2018-11-15 | |
| dc.description | Supervised by Md. Ashraful Alam Khan | en_US |
| dc.description.abstract | Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) has been used for so many years in 802.11 WLANs for its simplistic nature. A Binary Exponential Backoff (BEB) is used here so that each contending station in a network is chosen randomly. However the overall throughput of the network degrades drastically due to random nature of backoff mechanism. Therefore an alternate contention mechanism is required to overcome this problem. To overcome this problem of MAC inefficiency, we propose a modified backoff mechanism for MAC which can order the contending station by predictive backoff values of others stations. We use a hash based backoff mechanism to resolve the initial contention of the contending stations and after each successful transmission a fixed slot is assigned to each individual station. Therefore, our proposed approach contain the combination of backoff mechanism which is predictive hash based backoff for initial contention and modified deterministic backoff after successful trans- mission. In this way, a collision free schedule can be created and can support a large number of contenders. The simulation study show that the proposed scheme reduces the contention overhead and can gain high efficiency compared to standard channel access | en_US |
| dc.identifier.citation | [1] Y. HE, J. SUN, X. MA, A. V. VASILAKOS, R. YUAN, AND W. GONG, Semi- random backoff: towards resource reservation for channel access in wireless lans, IEEE/ACM Transactions on Networking (TON), 21 (2013), pp. 204–217. [2] HTTPS://WWW.NSNAM.ORG/. [3] A. P. JARDOSH, K. N. RAMACHANDRAN, K. C. ALMEROTH, AND E. M. BELDING- ROYER, Understanding congestion in ieee 802.11 b wireless networks, in Proceed- ings of the 5th ACM SIGCOMM conference on Internet Measurement, USENIX Association, 2005, pp. 25–25. [4] J. LEE AND J. C. WALRAND, Design and analysis of an asynchronous zero collision mac protocol, arXiv preprint arXiv:0806.3542, (2008). [5] T. LI, Q. NI, D. MALONE, D. LEITH, Y. XIAO, AND T. TURLETTI, Aggregation with fragment retransmission for very high-speed wlans, IEEE/ACM Transactions on Networking (ToN), 17 (2009), pp. 591–604. [6] E. H. ONG, J. KNECKT, O. ALANEN, Z. CHANG, T. HUOVINEN, AND T. NIHTILÄ, Ieee 802.11 ac: Enhancements for very high throughput wlans, in Personal indoor and mobile radio communications (PIMRC), 2011 IEEE 22nd international symposium on, IEEE, 2011, pp. 849–853. [7] D. PANIGRAHI AND B. RAMAN, Tdma scheduling in long-distance wifi networks, in INFOCOM 2009, IEEE, IEEE, 2009, pp. 2931–2935. [8] I. PAUDEL AND B. JOUABER, I-dcf: Improved dcf for channel access in ieee 802.11 wireless networks, in Vehicular Technology Conference (VTC Spring), 2014 IEEE 79th, IEEE, 2014, pp. 1–5. [9] L. SANABRIA-RUSSO, J. BARCELO, B. BELLALTA, AND F. GRINGOLI, A high effi- ciency mac protocol for wlans: Providing fairness in dense scenarios, IEEE/ACM Transactions on Networking, 25 (2017), pp. 492–505. BIBLIOGRAPHY [10] S. SEN, R. ROY CHOUDHURY, AND S. NELAKUDITI, No time to countdown: Mi- grating backoff to the frequency domain, in Proceedings of the 17th annual international conference on Mobile computing and networking, ACM, 2011, pp. 241–252. [11] K. TAN, J. FANG, Y. ZHANG, S. CHEN, L. SHI, J. ZHANG, AND Y. ZHANG, Fine- grained channel access in wireless lan, ACM SIGCOMM Computer Communica- tion Review, 41 (2011), pp. 147–158. [12] M. TUYSUZ AND H. A. MANTAR, A beacon-based collision-free channel access scheme for ieee 802.11 wlans, Wireless personal communications, 75 (2014), pp. 155–177. [13] P. WANG AND W. ZHUANG, A collision-free mac scheme for multimedia wireless mesh backbone, IEEE Transactions on Wireless Communications, 8 (2009). [14] Y. XIAO, Ieee 802.11 n: enhancements for higher throughput in wireless lans, IEEE Wireless Communications, 12 (2005), pp. 82–91. [15] Y. XIAO AND J. ROSDAHL, Performance analysis and enhancement for the current and future ieee 802.11 mac protocols, ACM SIGMOBILE Mobile Computing and Communications Review, 7 (2003), pp. 6–19. [16] W. ZAME, J. XU, AND M. VAN DER SCHAAR, Learning perfect coordination with minimal feedback in wireless multi-access communications, in Global Communi- cations Conference (GLOBECOM), 2013 IEEE, IEEE, 2013, pp. 3861–3866. [17] H. ZHAO, J. WEI, N. I. SARKAR, AND S. HUANG, E-mac: An evolutionary solution for collision avoidance in wireless ad hoc networks, Journal of Network and Computer Applications, 65 (2016), pp. 1–11. [18] L. ZHENDONG, 802.11 ac/ad: The next generation wlan technology standard, Mod- ern Science & Technology of Telecommunications, 12 (2010), p. 004. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/548 | |
| dc.language.iso | en | en_US |
| dc.publisher | Department of Computer Science and Engineering, Islamic University of Technology, Board Bazar, Gazipur, Bangladesh | en_US |
| dc.title | An Improved Channel Access Mechanism For IEEE 802.11 WLAN | en_US |
| dc.type | Thesis | en_US |