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Govindarajan, J.
- An Analysis on TCP Packet Reordering Problem in Mobile Ad-Hoc Network
Abstract Views :305 |
PDF Views:0
Authors
Affiliations
1 Department of CSE, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore – 641112, Tamil Nadu, IN
2 Coimbatore Institute of Technology, Coimbatore – 641014, Tamil Nadu, IN
1 Department of CSE, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore – 641112, Tamil Nadu, IN
2 Coimbatore Institute of Technology, Coimbatore – 641014, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 16 (2015), Pagination:Abstract
In Ad-hoc network, Packet reorder is effect of many causes like congestion loss, packet loss due to corruption, multi-path routing and node’s mobility. Transmission Control Protocol (TCP) performs poorly over wireless links which misinterprets the reordered packets as lost packets due to congestion. This has motivated researchers on developing TCP variants towards packet reordering problem for enhancing TCP performance. Some researchers have found the opportunity to use existing TCP variants like SACK, TCP-Westwood to address the reordering problem. TCP-DCR (TCP-Delayed Congestion Response) and RR-TCP (Reordering Robust TCP) are the TCP variants to acknowledge the packet reordering at the end level. In the existing investigations, the protocols were tested in a simulation environment with one or two causes (congestion or error) at a time over a simple topology. In our experiments, the simulation study of TCP variants has been done with all reordering causes simultaneously, over a large ad-hoc environment including mobility and multi-path routing. A performance analysis had been done using reordering metric (percentage of reordering) which accounts for earlier and lately arriving reordered packets and estimated using throughput and goodput metrics. From our analysis, it is observed that the Selective acknowledgement option of SACK-TCP and the delayed congestion response of DCR help to achieve better performance than other variants in presence of low reordering due to high congestion and low error. However, these variants were failed to meet up their performance in case of high reordering (reordering greater than 50%) due to high congestion loss and high channel error losses. This observation has given the research opportunity to incorporate a discrimination algorithm in the existing reordering solutions to classify the packet error from packet reordering.Keywords
Analysis, End-to-End Performance MANET, Packet Reordering, TCP- Review of Conventional Plasma Position Control and Development of BPN Based Adaptive Controllers for Aditya Tokamak
Abstract Views :211 |
PDF Views:5
Authors
J. Femila Roseline
1,
Yasser Arafat
2,
Jigneshkumar J. Patel
3,
J. Govindarajan
4,
N. M. Nandhitha
5,
B. Sheela Rani
6
Affiliations
1 Department of Electrical and Electronics Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
2 Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
3 Electronics Group, Institute of Plasma Research, IN
4 Institute of Plasma Research, IN
5 Department of Electronics and Telecommunication Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
6 Electronics & Instrumentation, Sathyabama University, Chennai-600119, IN
1 Department of Electrical and Electronics Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
2 Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
3 Electronics Group, Institute of Plasma Research, IN
4 Institute of Plasma Research, IN
5 Department of Electronics and Telecommunication Engineering, Sathyabama University, Jeppiaar Nagar, Old Mahabalipuram Road, Chennai-600119, IN
6 Electronics & Instrumentation, Sathyabama University, Chennai-600119, IN
Source
Artificial Intelligent Systems and Machine Learning, Vol 4, No 4 (2012), Pagination: 230-234Abstract
Tokamaks are machines used for generating electrical power through nuclear fusion from plasma that is confined within the toroidal chamber. As Tokamaks require large amount of input power to produce plasma, the efficiency can be improved only when significant output power is generated. Hence in recent years, research has begun in this area to improve its efficiency. From the literature, it is found that the amount of power generated is dependent on the density of the plasma, plasma position and time duration for which the plasma is properly stabilized. In order to improve the efficiency, it is necessary to confine the plasma for longer durations within the chamber. This paper provides an extensive review of various researches conducted in this area to improve the efficiency of the Tokamak machines by stabilizing the plasma. From the literature cited, it is obvious that an adaptive plasma positioning system is yet to be evolved.Keywords
Tokamaks, Plasma, Position Confinement, PID Controller, Fuzzy Logic Controller.- Analysis of TCP-unfairness from MAC Layer Perspective in Wireless Ad-hoc Networks
Abstract Views :241 |
PDF Views:0
Authors
Affiliations
1 Department of CSE, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore - 641112, Tamil Nadu, IN
2 Coimbatore Institute of Technology, Coimbatore - 641014, Tamil Nadu, IN
1 Department of CSE, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore - 641112, Tamil Nadu, IN
2 Coimbatore Institute of Technology, Coimbatore - 641014, Tamil Nadu, IN