A simulation-based study of TCP dynamics over HFC networks |
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| Affiliation: | 1. Department of Computer Science and Engineering, Indian School of Mines, Dhanbad 826004, India;2. Department of Computer Science and Information Systems, Birla Institute of Technology and Science, Pilani Campus, Rajasthan 333031, India;3. Center of Excellence in Information Assurance, King Saud University, Riyadh, Saudi Arabia;4. School of Software, Nanchang Hangkong University, Nanchang 330063, China;5. Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA;6. Department of Computer Science and Engineering, Thapar University, Patiala 147004, India;1. Department of Cattle Breeding and Milk Quality Evaluation, Faculty of Animal Bioengineering, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 5/137, 10-719 Olsztyn, Poland;2. Department of Systems Engineering, Faculty of Engineering, University of Warmia and Mazury in Olsztyn, Oczapowskiego 2, 10-719 Olsztyn, Poland;3. Department of Industrial Commodity, Basics of Techniques and Energy Management, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Pl. Cieszyński 1, 10-719 Olsztyn, Poland;4. Department of Animal Nutrition and Feed Sciences, Faculty of Animal Bioengineering, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 5/248, 10-719 Olsztyn, Poland |
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| Abstract: | New broadband access technologies such as hybrid fiber coaxial (HFC) are likely to provide fast and cost effective support to a variety of applications including video on demand (VoD), inter-active computer games, and Internet-type applications such as Web browsing, ftp, e-mail, and telephony. Since most of these applications use TCP as the transport layer protocol, the key to their efficiency largely depends on TCP protocol performance.We investigate the performance of TCP in terms of effective throughput in an HFC network environment using different load conditions and network buffer sizes. We find that TCP experiences low throughput as a result of the well-known problem of ACK compression. An algorithm that controls ACK spacing is introduced to improve TCP performance. |
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