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To overcome the performance problems of 802.11, we propose a CLD framework which is based on a cross-layer medium access control (MAC) protocol called the channel-aware buffer unit multiple access (C-BUMA). In the framework, the radio propagation (i.e. physical layer) is combined with the MAC sub-layer to develop a robust cross-layer communication. By sharing channel information with the MAC protocol, the approach reduced unnecessary packet transmissions, and hence reduced bandwidth wastage and significantly improved the system performance. The proposed CLD method is evaluated by extensive simulation experiments. A comparison with 802.11 standards is provided. Results obtained show that the network achieves up to 13.5% higher throughput, 56% lower packet delay, 40% better fairness, and 38% lower packet dropping with the proposed CLD. We also found that the proposed CLD outperforms Pham\u2019s CLD with respect to network throughput and packet dropping. The analysis and empirical results reported in this paper provide some insights into the design and evaluation of a CLD framework for improving data rate of 802.11 networks which may help researchers in this field to overcome the remaining design issues and challenges.<\/p>","DOI":"10.4018\/jbdcn.2013010102","type":"journal-article","created":{"date-parts":[[2013,7,16]],"date-time":"2013-07-16T09:47:09Z","timestamp":1373968029000},"page":"11-27","source":"Crossref","is-referenced-by-count":0,"title":["Design and Evaluation of a Cross-Layer Framework for Improving 802.11 Networks"],"prefix":"10.4018","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2770-8319","authenticated-orcid":true,"given":"Nurul I.","family":"Sarkar","sequence":"first","affiliation":[{"name":"School of Computing and Mathematical Sciences, Auckland University of Technology, Auckland, New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"jbdcn.2013010102-0","doi-asserted-by":"publisher","DOI":"10.1109\/TMC.2008.75"},{"key":"jbdcn.2013010102-1","doi-asserted-by":"publisher","DOI":"10.1016\/j.comcom.2011.03.002"},{"key":"jbdcn.2013010102-2","doi-asserted-by":"crossref","unstructured":"Chatzimisios, P., Boucouvalas, A. 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