R&D Projects

Title: Adaptive Resource Allocation for Rapid Formation of 6TiSCH Network in Industrial IoT

Sponsor: IIT Guwahati

Duration: 2019-2020

Designation: Principal Investigator

Project Overview: Main objective of this project is to resolve the issues related to rapid formation of 6TiSCH network effectively and efficiently in industrial internet of things (IIoT). Explicitly, the objectives are of designing and development of:

  • adaptive and faster resource allocation protocol for enhanced beacon scheduling
  • coordination protocol between RPL and network formation for resource optimal beaconing
  • a working prototype of IoT network testbed
  • implementation of proposed protocols in the developed testbed

IoT based Industrial Process Monitoring


Underwater Sensor Networks

Title: Towards Robust Efficient and Secure Data Acquisition in UWSNs

Sponsor: DIT (presently MeitY), Govt. of India

Duration: 2010-2013

Project Overview: Under the surface of water, networks of sensors can be used for different applications such as submarine monitoring, oil exploration, seismic monitoring and ocean mapping. Data acquisition scheme for those applications using underwater sensor networks (UWSNs) faces many challenges due to dynamic behavior of aquatic environment and acoustic communication. Therefore, the objectives of the project are:

  • Design and development of Robust UWSN Architecture, Delay Tolerant and Fault Tolerant Routing Protocols, Jamming Detection Scheme
  • Development of UWSN simulator using MATLAB

Principal Investigator: Prof. Sudip Misra, IIT Kharagpur


Title: Cross-functional Information System for Decision Making (CISDeM)

Sponsor: Ministry of Defence, Government of Singapore.

Duration: 2015-16

Project Overview: CISDeM is a cyber-information research program for decision making against network security threats. It adopts an inter-disciplinary research view — spanning security, natural language processing, machine learning, signal processing, and networking — to protect mission-critical network infrastructures. It stresses an experimental approach supported by a laboratory for sensing, computing, networking, visualization, and command-and-control. The synergistic research tracks will integrate to achieve holistic decision support for agile and proactive security informed by multi-modal and multi-layer empirical data. In this project, I was involved in Track 4: Network & System Level Anomaly Detection.

Principal Investigator of Track 4: Dr. Ngai-Man Cheung, SUTD Singapore

Network Anomaly Detection


Collaborative Research Works


Doctoral Thesis

Thesis Title: Analysis of Collisions in Contention-Based Wireless Networks

The objective of the research work was to analyse different aspects of frame collision in wireless MAC protocol design, specifically in the area of Wireless Local Area Network (WLAN). For achieving this, it was required to analyse the theoretical performance of the standard IEEE 802.11 MAC protocol followed by the design and analysis of performance tuning mechanisms from the frame collision view point. It was also important to analyse frame collision from the network security view point.

  • Proposed an absorbing Markov chain-based model to evaluate the packet-centric delay, fairness, trade-offs, and the scope of performance improvement of the IEEE 802.11 DCF multiple channel access protocol form the packet-centric viewpoint.
  • Designed a new backoff scheme, namely semi-distributed backoff (SDB), for performing on-demand sender- and receiver-centric backoff counter selection. Receiver-centric backoff always selects a disjoint set of optimal backoffs for the colliding stations, and, thus, helps in avoiding successive collision in WLANs.
  • Proposed Semi-DCF MAC protocol for delay sensitive applications in WLANs. In Semi-DCF, on-the-fly migration from random to deterministic backoff provides guaranteed channel access in random access MAC.
  • Identified the advantages of anomalous slot, which is in general considered as a cause of performance degradation, in the DCF protocol.
  • Proposed an anomalous transmission scheme for exploiting the opportunities created by anomalous slots, which, in turn, helps in performance improvement.
  • Proposed an ad-hoc, distributed, and runtime estimation approach, namely delay deviation ratio, for observing the experienced delay status of a station.
  • Proposed an approach for avoiding blind update of CW by introducing channel observation-based probabilistic update of CW in the backoff algorithm of the DCF protocol.
  • Proposed a joint optimization scheme, named delay-aware distributed dynamic adaptation of CW, for improving the saturation throughput and channel access delay of the MAC protocol at runtime.
  • Proposed a partial-packet-based channel observation metrics for capturing frame collision effect due to unauthorized activities in energy-constrained wireless network.
  • Established that the correct detection of controllable reactive jamming is possible in energy-constrained wireless networks.
  • Finally, theoretical performance analysis of all the proposed solution schemes have been performed using Markov chain model as it suits better for channel access protocols in WLANs.

PhD Research Problems



Master's Thesis

Thesis Title: GSPIN: Gradient-based Sensor Protocol for Information via Negotiation in WSNs

The objective of the project work was to reduce communication activity and energy consumption during information dissemination among sensor nodes in wireless sensor networks (WSNs). Heinzelman et al. proposed Sensor Protocols for Information via Negotiation (SPIN), a family of adaptive protocol, that solves the classic problem of flooding by finalizing communication decision of sensor nodes based upon application-specific knowledge of the data and knowledge of the resources that are available to them. However, the SPIN protocol has some shortcomings. Therefore, the specific objective of the Thesis work was to improve the performance of the SPIN protocol.

  • The proposed solution GSPIN improved the performance of SPIN protocol by utilizing the relative positioning information of sensor nodes specifically the position of a sink w.r.t. the source.


Industrial Projects

Worked as Assistant System Engineer in TATA Consultancy Services Ltd. (TCS) for 2 years and 5 months.

Projects

  • Insurance Solution Development

    Duration: 2008 — 2010.

    1. Client: Scandia BSM, China

    • Developed different types of Insurance Products and customized the associated modules such as Party, Business, Accounting, Work-flow, etc.
    • Designed the managerial work-flow as well as the automated work-flow for approving an insurance application.
    • Worked on both the front end and back end of software development. J2EE, JSP, JS, and XML have been used for designing the GUI and functional call, and ORACLE 10i Database Server has been used for data processing and storing.

    2. Client: DLF Pramerica, Noida, India

    • Developed different types of Insurance Products and customized the associated modules such as Party, Business, Accounting, Work-flow, etc.
    • Supervised a small development team of four employees.
    • Developed many SQL Packages for reducing product deployment overhead.
    • Worked on both the front end and back end of software development. J2EE, JSP, JS, and XML have been used for designing the GUI and functional call, and ORACLE 10i Database Server has been used for data processing and storing.