Sayandeep Sen's Research

Research Interests

My current research work is in the field of wireless mesh network planning and deplyment, I am involved in

* System design aspects of wireless networks viz., MAC protocol design
* Performance measurement and characterization of wireless networks
* Optimization algorithms for network planning

I am interested in most aspects of Computer Networks and System Design especially, Computer and Network Security, Distibuted systems and computer architecture.

Current Work

FRACTEL

under Prof. Bhaskaran Raman and Prof. Kameswari Chebrolu

WiFi-based Rural Data ACcess and TELephony (FRACTEL) is an extension of the Digital Gangetic Plains (DGP). DGP dealt with adapting 802.11 technology for long distance operations, to be used to form a backbone access network connecting villages to corresponding district headquarters.

FRACTEL on the other hand assumes the presence of a single point of connectivity per village and deals with providing voice/data services to each house/user in it. The work is challenging because of the following reasons,

* The behaviour of wireless media in rural settings has not been characterised (yet).
* A single point of connectivity constraints the amount of bandwidth available.
* Cost constraints make a Roofnet like deployment (unplanned, every user has radio hardware) infeasible.
* Also the power supply is erratic in rural setting (esp. in India).

I am working on the following issues of the project,

* I am carrying out measurements for characterizing properties of the wireless medium in rural settings.
* I am working on formulation of network architecture as well as designing of MAC and routing protocols for the above networks.

(August'06-Present)

Past Work

Digital Gangetic Plains

under Prof. Bhaskaran Raman and Prof. Kameswari Chebrolu

My work in the project involved the following

1.DGP measurement study:

I have worked under Prof. Kameswari Chebrolu and Prof. Bhaskaran Raman to carry out the first detailed performance study of long-distance 802.11 links at various layers of the network stack.
(See paper titled "Long-Distance 802.11b Links: Performance Measurements and Experience")

2.Topology planning:

I worked on designing algorithms for planning of long distance wireless mesh networks as part of my Master's thesis. (See thesis or paper titled "Long Distance Wireless Mesh Network Planning: Problem Formulation and Solution")

3.Economic Viability of Wi-Fi based Rural Telephony Service:

I have worked under Prof. Bhaskaran Raman on studying the social and economic aspects of providing telephony service using VoIP over a 802.11b link (37 Km) at a village. The current deployment was found to
be loss making and hence, not suitable for replication. However we proposed an optimal infrastructure deployment and a new business model for profitable functioning of the service.
(See paper titled "Rural Telephony: A Socio-Economic Case Study")

(August'05-July'06)





xx	x	Research Interests	x	xx
				My current research work is in the field of wireless mesh network planning and deplyment, I am involved in * System design aspects of wireless networks viz., MAC protocol design * Performance measurement and characterization of wireless networks * Optimization algorithms for network planning I am interested in most aspects of Computer Networks and System Design especially, Computer and Network Security, Distibuted systems and computer architecture.

xx	x	Current Work	x	xx
				FRACTEL under Prof. Bhaskaran Raman and Prof. Kameswari Chebrolu WiFi-based Rural Data ACcess and TELephony (FRACTEL) is an extension of the Digital Gangetic Plains (DGP). DGP dealt with adapting 802.11 technology for long distance operations, to be used to form a backbone access network connecting villages to corresponding district headquarters. FRACTEL on the other hand assumes the presence of a single point of connectivity per village and deals with providing voice/data services to each house/user in it. The work is challenging because of the following reasons, * The behaviour of wireless media in rural settings has not been characterised (yet). * A single point of connectivity constraints the amount of bandwidth available. * Cost constraints make a Roofnet like deployment (unplanned, every user has radio hardware) infeasible. * Also the power supply is erratic in rural setting (esp. in India). I am working on the following issues of the project, * I am carrying out measurements for characterizing properties of the wireless medium in rural settings. * I am working on formulation of network architecture as well as designing of MAC and routing protocols for the above networks. (August'06-Present)

xx	x	Past Work	x	xx
				Digital Gangetic Plains under Prof. Bhaskaran Raman and Prof. Kameswari Chebrolu My work in the project involved the following 1.DGP measurement study: I have worked under Prof. Kameswari Chebrolu and Prof. Bhaskaran Raman to carry out the first detailed performance study of long-distance 802.11 links at various layers of the network stack. (See paper titled "Long-Distance 802.11b Links: Performance Measurements and Experience") 2.Topology planning: I worked on designing algorithms for planning of long distance wireless mesh networks as part of my Master's thesis. (See thesis or paper titled "Long Distance Wireless Mesh Network Planning: Problem Formulation and Solution") 3.Economic Viability of Wi-Fi based Rural Telephony Service: I have worked under Prof. Bhaskaran Raman on studying the social and economic aspects of providing telephony service using VoIP over a 802.11b link (37 Km) at a village. The current deployment was found to be loss making and hence, not suitable for replication. However we proposed an optimal infrastructure deployment and a new business model for profitable functioning of the service. (See paper titled "Rural Telephony: A Socio-Economic Case Study") (August'05-July'06)




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