Invited talk by Sandip Chakraborty onData Rate Adaptation in Multi-Rate Mesh Networks: Path Length vs Network Contention

Title Of the Talk: Data Rate Adaptation in Multi-Rate Mesh Networks: Path Length vs Network Contention
Speaker: Sandip Chakraborty
Date &Time:Wednesday April 9, 2014 2pm – 3pm  
Venue:Room No-123
Most of the commercially available wireless routers are equipped with multi-rate support to adopt physical data rates based on the channel condition fluctuations. The recent studies in multi-rate support have shown that low data rates are more effective when the channel error rate is high. Because of the physical layer modulation and signal decoding issues, low data rates are sustainable for long transmission ranges. Therefore, for multi-hop mesh networks, low data rates may scale down the end-toend path length towards the destination in terms of number of hops, resulting in less end-to-end forwarding delay. However, for a network with high traffic load, long transmission ranges may increase contention for channel access among the contending neighbors. In this talk, I'll first discuss about the trade-off among data rate, end-to-end path length and network contention in a multi-rate mesh network built over the IEEE 802.11s specifications. From the observations of the theoretical analysis, I'll discuss about a distributed and localized rate adaptation scheme for IEEE 802.11s mesh networks, by augmenting the standard peer selection, channel access and forwarding protocols. I'll also bring a performance comparison of the proposed rate adaptation protocol with other existing rate adaptation schemes. Finally, I'll conclude my talk with future direction of researches in multi-rate mesh network, and a general discussions of future prospects of the wireless mesh networking technology. 
Speaker Profile:
Sandip Chakraborty has completed the B.Eng. degree from the Department of Information Technology, Jadavpur University, Kolkata, India in the year 2009. He has received University Gold Medal for securing first position in the B.Eng (Information Technology) and the Arun Kumar Bandyopadhyay Memorial Bronze Medal, awarded by Jadavpur University, for securing the second highest aggregate of marks among all the courses of B.Eng examination. He has also received TATA Consultancy Services Best Student Project Award for his Bachelor's project. He completed his M.Tech. degree from the Department of Computer Science and Engineering, Indian Institute of Technology Guwahati, Assam, India in 2011, where he has continued working toward the PhD degree under the supervision of Prof. Sukumar Nandi. He has been awarded 'Best Graduate Student Award' by TATA Consultancy Services, India for his academic performance in M. Tech programme. He has received TCS Research Fellowship from TATA Consultancy Services, India for pursuing his PhD programme. At Present, He is a research fellow at Indian Institute of Technology, Guwahati. His research interests include wireless ad hoc and mesh networks, wireless sensor networks, distributed algorithms, performance modelling of communication Systems, etc. He has also worked in other fields, such as fault-tolerance computing, network security, mobile middleware etc., in cooperation with other research groups at Jadavpur University, IIT Guwahati and KIIT Bhubaneswar.

Wednesday, April 9, 2014 - 15:00 to 16:00