.
Research Area:
Mobile Ad Hoc Networks, Wireless Communication, IP Address Autoconfiguration, Mobility Management: Location Management and Handoff Management, TCP in MANET, etc.
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Research Publications:
1. Sourav Saha, Mainak Mukherjee, Avik Ranjan Paul and Sarmistha Neogy, TPRLM: Time- based Probabilistic Relational Location Management Scheme for Wireless Cellular Networks, published in IEEE/Create-Net/ICST International Conference on COMmunication System softWAre and MiddlewaRE (COMSWARE), Bangalore, India, Jan, 2007.
Abstract: Locating mobile nodes and delivery of inward calls to that node in wireless cellular networks, in spite of extreme mobility of the nodes, is a challenging issue. Fast and error-free delivery of packets to perfect destination with good performance in wireless environment is extremely difficult to attain. Several available location management schemes incur huge location update cost, paging cost and network bandwidth wastage in attempt to achieve it. They also offer significant location update delay and paging delay. Interactivity and great efficiency are also lacking. In this paper, the framework of a scheme TPRLM is proposed. This scheme combines relational level-based coverage area management with organized Informing Cells and time-based probabilistic priority calculation based on inward call arrival rate of any node. The scheme tries to attain cost-effectiveness, reduced location update delay and paging delay. There is also scope for interactivity and improved performance without complexity.
2. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, Mobile-autoconf: Mobility Management with Autoconfiguration in Mobile Ad-Hoc Networks, published in IEEE Region 10 International Conference TENCON 2008 on Innovative Technologies for Social Transformation, University of Hyderabad, India, 18-21 November, 2008.
Abstract: A mobile node needs to be configured with a unique IP address. It has been seen that address autoconfiguration is a suitable technique in MANETs because of high mobility of nodes. Extensive survey of previous autoconfiguration related schemes reveal the need for reducing DoS attack, security breaches and improving DAD, QoS and overall performance. This paper also presents a critical study of Mobility management related schemes. In this paper, we propose a scheme Mobile-autoconf that employs ring-based hierarchy for both autoconfiguration and mobility management for larger MANETs. It reduces DAD dependency, scope for DoS attack and temporary address dependency. It reduces cost increases reliability, robustness and location management becomes easier. QoS improvement and recycling of address pool are also aimed at here. The simulation of Mobile-autoconf is also carried out.
3. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, FHMS: Fuzzy Logic-based Handoff Management Scheme for Mobile Ad Hoc Networks, Proceedings of 15th International Conference on Advanced Computing and Communication (ADCOM 2007), pp. 408-413, Guwahati, India, Dec. 2007.
Abstract: Error-free and fast handoff support in excessive mobile world is challenging issue. Various earlier related works require improvement of QoS, reduction of packet loss advanced support of fast handoff etc. In this paper we propose one simple, flexible, modular and inexpensive fuzzy logic-based handoff management scheme FHMS for wireless networks that reduces packet losses and forced termination probability while not increasing call-blocking probability considerably. It also attempts to raise the accuracy of system behavioral representation and increasing precision. Fast handoff support, QoS enhancement, location update cycle time reduction, performance advancement are also parts of our effort. The simulation of it also supports its capability and potential.
4. Sourav Saha and Sarmistha Neogy, IPMANautoconf: A Scheme for IPv6 Address Autoconfiguration in Mobile Ad Hoc Networks, Proceedings of 5th Asian International Conference on Mobile Computing (AMOC), pp. 73-82, Kolkata, India, January 2007.
Abstract: In MANET each IP device must be configured with a unique IP address. IP address configuration can be done statically (for wired administered network nodes) or dynamically. In undesirable situations automatic network configuration is necessary for the nodes. It has been seen that address autoconfiguration is very much suitable for MANETs due to high mobility of nodes. In this paper we have analyzed IPv6 scenario in MANET with autoconfiguration basics. We have investigated the basic schemes of the existing works in IP address autoconfiguration to find out the advantages and problems or future working scopes. We have proposed a new scheme ‘IPMANautoconf’ for IPv6 autoconfiguration in MANET, with its objective, scheme description, algorithm and future working scope. We have simulated it to evaluate its performance.
5. Sourav Saha and Sarmistha Neogy, A Framework for Warning of Floods Using Wireless Technologies, Proceedings of World Conference on Disaster Reduction (WCDR), pp.167-181, Mumbai, India, November, 2005.
Abstract: This paper concentrates on warning the people about flood using Bluetooth, Wireless Application Protocol enabled mobile phones, Internet, wireless LAN & GIS. Today mobile devices such as mobile phones, Laptops are on a great use. The technology behind them are developing & the cost of using these facilities are decreasing day by day. Also the range of mobile network for cell phones are increasing. The comfort of using mobile devices & Bluetooth-enabled devices can never be denied. These facilities are really useful for warning the people about flood since mobile devices are very effective for flood prone areas especially in severe times. WAP enabled mobile phones support a lot of essential facilities needed by a person working for the betterment of the people of the flood prone areas. Internet is very well-known facility for communicating with the world & being in touch of many important information like weather forecasts etc. GIS is very efficient for providing geo-information etc. which are very much necessary for predicting the amount of loss in terms of lives, wealth, natural resources etc. if flood occurs; where the chance of amount of loss is higher, need of warning is very much needed. The previous works related to flood disaster management suffer from some problems like lack of proper communication between field workers, difficulty of dynamic plan modification, data sharing, broadcasting of upper level instructions to field level etc. , not using latest technologies like WLAN, Bluetooth, WAP etc. We have tried to produce one flood warning system to address the afore said problems. Our paper provides a framework of a flood warning system consisting three segments, namely, field management, middle management & the upper management. The field management segment should work at flood prone areas & should use laptops in IEEE 802.11b wireless LAN in infrastructure mode. The middle management segment should be attached with GIS database, remote sensed data, hazard maps, web sites of the weather department etc. They should communicate with the field management for commanding & directing them. They should also communicate with the upper management & abide by their directions. They should use desktops with Internet facility. The upper management segment should use WAP enabled mobile phones, Bluetooth-enabled devices & desktops with Internet access. They should analyze the probability of flood, predict the chance of loss in any area & set the intensity of warning at that area. They should work as the main decision makers of the system. The framework of our system uses the modern facilities especially the Bluetooth, WAP enabled mobile phones & wireless LAN due to the applicability of those in various respects in warning people about flood.
6. Sourav Saha and Sarmistha Neogy, S-TCP – A Sophisticated TCP For Mobile Ad Hoc Networks, Proc. of 4th Asian International Conference on Mobile Computing (AMOC) 2006, pp. 22-31, Kolkata, India from 4-7 Jan. 2006.
Abstract: TCP performance is inadequate in mobile ad-hoc networks. Interconnection between nodes are capable of changing on a continual and arbitrary manner for these networks. So, route failure and route changes are very frequent here. Route failure results in packet loss. Again, route changes cause out-of-order delivery. Now, TCP assumes network congestion whenever packets are lost. So, it takes congestion control actions like decreasing the window size, which in turn reduces the throughput and link utilization. Again, existing TCP controls route changes in the following way: It freezes it’s state as soon as route breaks are identified. Then it starts as soon as new route is found. It requires feedback or instant notification from intermediate nodes to all TCP senders and from Network layer to Transport layer, which are really difficult and costly. Again, non-negligible wireless medium losses like high bit error rate (BER), frequent connectivity disruptions are common for wireless networks. There are several schemes that try to improve TCP performance. In this paper we propose an approach (S-TCP or Sophisticated TCP) for communication for mobile adhoc networks which will decrease the chances of route failure and route changes here. The present approach decreases packet losses due to route changes. This procedure also decreases out-of-order deliveries due to route-failures. Our approach also tries to decrease the ill effects of abrupt disruptions and high bit error rates. So, the performance and throughput of mobile ad-hoc networks will be better with this approach. The simulation of this scheme also supports it.
7. Sourav Saha, Soma Basu, Arpita Pal and Sarmistha Neogy, DPI-HLMS: Dynamically Placed Informer-based Hierarchical Location Management Scheme for Mobile Ad Hoc Networks, Proc. of National Conference on Recent Trends in Intelligent Computing (RTIC), pp. 17-23, Kalyani, Nadia, November, 2006.
Abstract: Location management, in spite of node mobility and topology change in mobile ad-hoc networks has been very much desirable and tough-to-attain feature. Maintaining appropriate location information, providing the sender node with appropriate information about the current location of the destination node and correct delivery of inward calls to the target node is really challenging. Several scheme proposals related to location management in mobile ad-hoc network cannot minimize the location update cost and latency. The positional query service time is needed to be reduced more. Again, optimization of the denseness of location servers is required. In this paper we present the framework of the scheme DPI-HLMS, which tries to employ dynamically, placed informers, organized hierarchically, to better handle the node mobility in MANET. The location update latency and cost, location query service time etc. are attempted to lessen here for enhancement of the performance of location management.
8. Sourav Saha and Sarmistha Neogy, Analytical Study of IP Address Autoconfiguration for Mobile Ad-Hoc Networks, Proc. Of ReTIS 2006, pp. 160-163, Kolkata, India, July, 2006.
Abstract: Mobile computers with battery power are becoming an indispensable part of our fast life nowadays. A mobile adhoc network (MANET) is a group of wireless nodes, capable of spontaneous movement, cooperatively forming an IP-based network. The purpose of address autoconfiguration is the assignment of a unique and routable address to an interface in network. Since in MANETs generally nodes are not configured manually and network administrators are not present, the nodes therefore have to rely on address autoconfiguration to communicate with others. The basic objectives of our study include: surveying the basic schemes of the works proposed related to IP address autoconfiguration in MANET, and investigating the applicability of the proposed works there.
9. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, An Analytical Survey of Mobility Management Schemes for Wireless Networks, in Proc. of National Conference on Smart Communication Technologies and Industrial Informatics (SCTII), pp. 101-108, Rourkela, Feb. 2007.
Abstract: The important areas of mobility management include location management, hand-off management among others. Mobility demands fast and seamless handoff, increased moving speed and wider coverage area, improved QoS along with enhanced routing.
In this paper we have investigated the present status of IP node mobility for wireless networks and critically studied the performances of several existing mobility management schemes. We have also earmarked several areas in which major improvement may be done for designing an enhanced mobility management scheme. The present work is essentially a survey of the existing mobility management schemes.
10. Sourav Saha, Somak Bhattacharya and Sarmistha Neogy, An Analytical Study of Handoff Management Schemes for Mobility Handling in Wireless Networks, Proc. Of NUCONE 06, Ahmedabad, Nov-Dec’06.
Abstract: Mobile nodes have become one extremely essential survival tool for the people of today’s fast and dynamic world. Service providers are also in need of a generalized solution for the efficient utilization of their resources. So, mobility management is massively important to handle the movement of wireless nodes. Handoff is a process of altering attachment point of a mobile node from one base station or access point to another. In wireless networks if any mobile node moves out of range while communication is in progress, handoff occurs. The signal strength may become weaker and packet losses or error in communication may take place then. Again, call delivery process at handoff is really challenging issue. But fast, frequent and error-free handoff is very much desirable in current scenario. So, efficient handoff management is terribly required for superior mobility management. Handoff management deals with handoff initiation, smoothing, buffering, connection routing etc. In this paper the basic concept of handoff and present status of handoff management in context of mobility management for wireless networks is discussed. The fundamental concepts of the proposed schemes in related field are critically analyzed here and the advantages and advancement possibilities are presented. The overall impression of our survey is also included here. Finally the future research and development scopes in related field are suggested.
11. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, Locating mobile nodes using heuristics with fuzzy logic handoff, International Journal of Artificial Intelligence and Soft Computing (IJAISC), Inderscience Publishers, Vol. 1, Nos. 2/3/4, 2009.
Abstract: In wireless and mobile networks ensuring smooth handoff and tracing exact location of destination node and that too without wasting much time and bandwidth of constrained network is much essential. Several related techniques have been proposed in literature. Each has its own advantages/disadvantages. In this paper, we have proposed, first, a fuzzy logic based handoff management scheme that also handles some basic network management activities like call transferring after allotting a suitable wireless or radio link to the incoming node. It also proposes a location management scheme based on simple heuristics technique like time and probability.
Abstract: Locating mobile nodes and delivery of inward calls to that node in wireless cellular networks, in spite of extreme mobility of the nodes, is a challenging issue. Fast and error-free delivery of packets to perfect destination with good performance in wireless environment is extremely difficult to attain. Several available location management schemes incur huge location update cost, paging cost and network bandwidth wastage in attempt to achieve it. They also offer significant location update delay and paging delay. Interactivity and great efficiency are also lacking. In this paper, the framework of a scheme TPRLM is proposed. This scheme combines relational level-based coverage area management with organized Informing Cells and time-based probabilistic priority calculation based on inward call arrival rate of any node. The scheme tries to attain cost-effectiveness, reduced location update delay and paging delay. There is also scope for interactivity and improved performance without complexity.
2. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, Mobile-autoconf: Mobility Management with Autoconfiguration in Mobile Ad-Hoc Networks, published in IEEE Region 10 International Conference TENCON 2008 on Innovative Technologies for Social Transformation, University of Hyderabad, India, 18-21 November, 2008.
Abstract: A mobile node needs to be configured with a unique IP address. It has been seen that address autoconfiguration is a suitable technique in MANETs because of high mobility of nodes. Extensive survey of previous autoconfiguration related schemes reveal the need for reducing DoS attack, security breaches and improving DAD, QoS and overall performance. This paper also presents a critical study of Mobility management related schemes. In this paper, we propose a scheme Mobile-autoconf that employs ring-based hierarchy for both autoconfiguration and mobility management for larger MANETs. It reduces DAD dependency, scope for DoS attack and temporary address dependency. It reduces cost increases reliability, robustness and location management becomes easier. QoS improvement and recycling of address pool are also aimed at here. The simulation of Mobile-autoconf is also carried out.
3. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, FHMS: Fuzzy Logic-based Handoff Management Scheme for Mobile Ad Hoc Networks, Proceedings of 15th International Conference on Advanced Computing and Communication (ADCOM 2007), pp. 408-413, Guwahati, India, Dec. 2007.
Abstract: Error-free and fast handoff support in excessive mobile world is challenging issue. Various earlier related works require improvement of QoS, reduction of packet loss advanced support of fast handoff etc. In this paper we propose one simple, flexible, modular and inexpensive fuzzy logic-based handoff management scheme FHMS for wireless networks that reduces packet losses and forced termination probability while not increasing call-blocking probability considerably. It also attempts to raise the accuracy of system behavioral representation and increasing precision. Fast handoff support, QoS enhancement, location update cycle time reduction, performance advancement are also parts of our effort. The simulation of it also supports its capability and potential.
4. Sourav Saha and Sarmistha Neogy, IPMANautoconf: A Scheme for IPv6 Address Autoconfiguration in Mobile Ad Hoc Networks, Proceedings of 5th Asian International Conference on Mobile Computing (AMOC), pp. 73-82, Kolkata, India, January 2007.
Abstract: In MANET each IP device must be configured with a unique IP address. IP address configuration can be done statically (for wired administered network nodes) or dynamically. In undesirable situations automatic network configuration is necessary for the nodes. It has been seen that address autoconfiguration is very much suitable for MANETs due to high mobility of nodes. In this paper we have analyzed IPv6 scenario in MANET with autoconfiguration basics. We have investigated the basic schemes of the existing works in IP address autoconfiguration to find out the advantages and problems or future working scopes. We have proposed a new scheme ‘IPMANautoconf’ for IPv6 autoconfiguration in MANET, with its objective, scheme description, algorithm and future working scope. We have simulated it to evaluate its performance.
5. Sourav Saha and Sarmistha Neogy, A Framework for Warning of Floods Using Wireless Technologies, Proceedings of World Conference on Disaster Reduction (WCDR), pp.167-181, Mumbai, India, November, 2005.
Abstract: This paper concentrates on warning the people about flood using Bluetooth, Wireless Application Protocol enabled mobile phones, Internet, wireless LAN & GIS. Today mobile devices such as mobile phones, Laptops are on a great use. The technology behind them are developing & the cost of using these facilities are decreasing day by day. Also the range of mobile network for cell phones are increasing. The comfort of using mobile devices & Bluetooth-enabled devices can never be denied. These facilities are really useful for warning the people about flood since mobile devices are very effective for flood prone areas especially in severe times. WAP enabled mobile phones support a lot of essential facilities needed by a person working for the betterment of the people of the flood prone areas. Internet is very well-known facility for communicating with the world & being in touch of many important information like weather forecasts etc. GIS is very efficient for providing geo-information etc. which are very much necessary for predicting the amount of loss in terms of lives, wealth, natural resources etc. if flood occurs; where the chance of amount of loss is higher, need of warning is very much needed. The previous works related to flood disaster management suffer from some problems like lack of proper communication between field workers, difficulty of dynamic plan modification, data sharing, broadcasting of upper level instructions to field level etc. , not using latest technologies like WLAN, Bluetooth, WAP etc. We have tried to produce one flood warning system to address the afore said problems. Our paper provides a framework of a flood warning system consisting three segments, namely, field management, middle management & the upper management. The field management segment should work at flood prone areas & should use laptops in IEEE 802.11b wireless LAN in infrastructure mode. The middle management segment should be attached with GIS database, remote sensed data, hazard maps, web sites of the weather department etc. They should communicate with the field management for commanding & directing them. They should also communicate with the upper management & abide by their directions. They should use desktops with Internet facility. The upper management segment should use WAP enabled mobile phones, Bluetooth-enabled devices & desktops with Internet access. They should analyze the probability of flood, predict the chance of loss in any area & set the intensity of warning at that area. They should work as the main decision makers of the system. The framework of our system uses the modern facilities especially the Bluetooth, WAP enabled mobile phones & wireless LAN due to the applicability of those in various respects in warning people about flood.
6. Sourav Saha and Sarmistha Neogy, S-TCP – A Sophisticated TCP For Mobile Ad Hoc Networks, Proc. of 4th Asian International Conference on Mobile Computing (AMOC) 2006, pp. 22-31, Kolkata, India from 4-7 Jan. 2006.
Abstract: TCP performance is inadequate in mobile ad-hoc networks. Interconnection between nodes are capable of changing on a continual and arbitrary manner for these networks. So, route failure and route changes are very frequent here. Route failure results in packet loss. Again, route changes cause out-of-order delivery. Now, TCP assumes network congestion whenever packets are lost. So, it takes congestion control actions like decreasing the window size, which in turn reduces the throughput and link utilization. Again, existing TCP controls route changes in the following way: It freezes it’s state as soon as route breaks are identified. Then it starts as soon as new route is found. It requires feedback or instant notification from intermediate nodes to all TCP senders and from Network layer to Transport layer, which are really difficult and costly. Again, non-negligible wireless medium losses like high bit error rate (BER), frequent connectivity disruptions are common for wireless networks. There are several schemes that try to improve TCP performance. In this paper we propose an approach (S-TCP or Sophisticated TCP) for communication for mobile adhoc networks which will decrease the chances of route failure and route changes here. The present approach decreases packet losses due to route changes. This procedure also decreases out-of-order deliveries due to route-failures. Our approach also tries to decrease the ill effects of abrupt disruptions and high bit error rates. So, the performance and throughput of mobile ad-hoc networks will be better with this approach. The simulation of this scheme also supports it.
7. Sourav Saha, Soma Basu, Arpita Pal and Sarmistha Neogy, DPI-HLMS: Dynamically Placed Informer-based Hierarchical Location Management Scheme for Mobile Ad Hoc Networks, Proc. of National Conference on Recent Trends in Intelligent Computing (RTIC), pp. 17-23, Kalyani, Nadia, November, 2006.
Abstract: Location management, in spite of node mobility and topology change in mobile ad-hoc networks has been very much desirable and tough-to-attain feature. Maintaining appropriate location information, providing the sender node with appropriate information about the current location of the destination node and correct delivery of inward calls to the target node is really challenging. Several scheme proposals related to location management in mobile ad-hoc network cannot minimize the location update cost and latency. The positional query service time is needed to be reduced more. Again, optimization of the denseness of location servers is required. In this paper we present the framework of the scheme DPI-HLMS, which tries to employ dynamically, placed informers, organized hierarchically, to better handle the node mobility in MANET. The location update latency and cost, location query service time etc. are attempted to lessen here for enhancement of the performance of location management.
8. Sourav Saha and Sarmistha Neogy, Analytical Study of IP Address Autoconfiguration for Mobile Ad-Hoc Networks, Proc. Of ReTIS 2006, pp. 160-163, Kolkata, India, July, 2006.
Abstract: Mobile computers with battery power are becoming an indispensable part of our fast life nowadays. A mobile adhoc network (MANET) is a group of wireless nodes, capable of spontaneous movement, cooperatively forming an IP-based network. The purpose of address autoconfiguration is the assignment of a unique and routable address to an interface in network. Since in MANETs generally nodes are not configured manually and network administrators are not present, the nodes therefore have to rely on address autoconfiguration to communicate with others. The basic objectives of our study include: surveying the basic schemes of the works proposed related to IP address autoconfiguration in MANET, and investigating the applicability of the proposed works there.
9. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, An Analytical Survey of Mobility Management Schemes for Wireless Networks, in Proc. of National Conference on Smart Communication Technologies and Industrial Informatics (SCTII), pp. 101-108, Rourkela, Feb. 2007.
Abstract: The important areas of mobility management include location management, hand-off management among others. Mobility demands fast and seamless handoff, increased moving speed and wider coverage area, improved QoS along with enhanced routing.
In this paper we have investigated the present status of IP node mobility for wireless networks and critically studied the performances of several existing mobility management schemes. We have also earmarked several areas in which major improvement may be done for designing an enhanced mobility management scheme. The present work is essentially a survey of the existing mobility management schemes.
10. Sourav Saha, Somak Bhattacharya and Sarmistha Neogy, An Analytical Study of Handoff Management Schemes for Mobility Handling in Wireless Networks, Proc. Of NUCONE 06, Ahmedabad, Nov-Dec’06.
Abstract: Mobile nodes have become one extremely essential survival tool for the people of today’s fast and dynamic world. Service providers are also in need of a generalized solution for the efficient utilization of their resources. So, mobility management is massively important to handle the movement of wireless nodes. Handoff is a process of altering attachment point of a mobile node from one base station or access point to another. In wireless networks if any mobile node moves out of range while communication is in progress, handoff occurs. The signal strength may become weaker and packet losses or error in communication may take place then. Again, call delivery process at handoff is really challenging issue. But fast, frequent and error-free handoff is very much desirable in current scenario. So, efficient handoff management is terribly required for superior mobility management. Handoff management deals with handoff initiation, smoothing, buffering, connection routing etc. In this paper the basic concept of handoff and present status of handoff management in context of mobility management for wireless networks is discussed. The fundamental concepts of the proposed schemes in related field are critically analyzed here and the advantages and advancement possibilities are presented. The overall impression of our survey is also included here. Finally the future research and development scopes in related field are suggested.
11. Sourav Saha, Mainak Mukherjee and Sarmistha Neogy, Locating mobile nodes using heuristics with fuzzy logic handoff, International Journal of Artificial Intelligence and Soft Computing (IJAISC), Inderscience Publishers, Vol. 1, Nos. 2/3/4, 2009.
Abstract: In wireless and mobile networks ensuring smooth handoff and tracing exact location of destination node and that too without wasting much time and bandwidth of constrained network is much essential. Several related techniques have been proposed in literature. Each has its own advantages/disadvantages. In this paper, we have proposed, first, a fuzzy logic based handoff management scheme that also handles some basic network management activities like call transferring after allotting a suitable wireless or radio link to the incoming node. It also proposes a location management scheme based on simple heuristics technique like time and probability.
