Electrochemical Communication in Bacterial Biofilms: A Study on Potassium Stimulation and Signal Transmission Nithin V. Sabu, Bige Deniz Unluturk IEEE Wireless Communications and Networking Conference Wcnc, 2024 Electrochemical communication is a mechanism that enables intercellular interaction among bacteria within communities. Bacteria achieves synchronization and coordinates collective actions at the population level through the utilization of electrochemical signals. In this work, we investigate the response of bacterial biofilms to artificial potassium concentration stimulation. We introduce signal inputs at a specific location within the biofilm and observe their transmission to other regions, facilitated by intermediary cells that amplify and relay the signal. We analyze the output signals when biofilm regions are subjected to different input signal types and explore their impact on biofilm growth. Furthermore, we investigate how the temporal gap between input pulses influences output signal characteristics, demonstrating that an appropriate gap yields distinct and well-defined output signals. Our research sheds light on the potential of bacterial biofilms as communication nodes in electrochemical communication networks.
THz-Based Microfluidic LSPP-Metastructure for the Analysis of Electrochemical Communication in Bacterial Networks Aqeel Hussain Naqvi, Nithin V. Sabu, Wen Li, Bige Deniz Unluturk 2024 IEEE International Black Sea Conference on Communications and Networking Blackseacom 2024, 2024 Recent research has demonstrated that bacteria in biofilms use ion-channel based electrochemical signals for information transfer. This finding positions biofilms as a promising candidate for various applications in molecular communication systems. This work focuses on a novel design: a terahertz (THz) metastructure based on localized surface plasmon polariton (LSPP) metastructures combined with a microfluidic platform for studying electrochemical signaling in bacterial biofilms. This LSPP metastructure, consisting of meticulously constructed metallic nanostructures, allows for effective interaction between THz radiation and the biofilm's electrochemical signals. Concurrently, the microfluidic platform provides a precisely controlled environment for the study of bacterial communication. THz spectroscopy and imaging techniques can provide useful information about the dynamics of the signaling molecules involved in bacterial communication. Along with facilitating a better understanding of bacterial communication mechanisms, this integrated system has several applications in biosensing, bioelectronics, and bioengineering, opening the way for future advances in the field.
On the Caching Performance of Vehicular Networks with Platooned Traffic Nithin V. Sabu, Kaushlendra Pandey, Abhishek K. Gupta, Adrish Banerjee IEEE Wireless Communications and Networking Conference Wcnc, 2024 This work analyzes the performance of a cache-enabled vehicular communication network with platooned vehicular users aided by base stations (BSs) for cellular connectivity. We consider a caching scheme that prioritizes searching for files within the same platoon to minimize latency and resorts to the BS connection if the file is unavailable in the platoon. The file access probability representing the probability of the typical vehicular user acquiring a file from another vehicle in the same platoon or from a BS is presented. We also study the design of optimal caching placement that maximizes the total file access probability subject to memory constraints. Further, design insights are provided with the help of derived expressions and numerical results. Results indicate that based on the system parameters and relative link quality of vehicular and cellular links, it may be optimal to cache more popular files or may not be optimal to cache any file at all.
Channel Characterization and Performance of a 3-D Molecular Communication System With Multiple Fully-Absorbing Receivers Nithin V. Sabu, Abhishek K. Gupta, Neeraj Varshney, Anshuman Jindal IEEE Transactions on Communications, 2023 Molecular communication (MC) can enable the transfer of information between nanomachines using molecules as the information carrier. In MC systems, multiple receiver nanomachines often co-exist in the same communication channel to serve common or different purposes. However, the analytical channel model for a system with multiple fully absorbing receivers (FARs), which is significantly different from the single FAR system due to the mutual influence of FARs, does not exist in the literature. The analytical channel model is essential in analyzing systems with multiple FARs, including MIMO, SIMO, and cognitive molecular communication systems. In this work, we derive an analytical expression for the hitting probability of a molecule emitted from a point source on each FAR in a diffusion-based MC system with $N$ FARs. Using these expressions, we derive the channel model for a SIMO system with a single transmitter and multiple FARs arranged in a uniform circular array (UCA). We then analyze the communication performance of this SIMO system under different cooperative detection schemes and develop several interesting insights.
Diversity Combining in a Single-Input-Multiple-Output Molecular Communication System Abhishek K. Gupta, Nithin V. Sabu 2022 National Conference on Communications Ncc 2022, 2022 Molecular communication (MC) can enable nano-scale devices to communicate with each other using molecules as information carriers. To enhance the performance of MC, receiver-devices with multiple receiving ports can be utilized to form single-input multiple-output (SIMO) and multiple-input multiple-output (MIMO) communication links. The receiver ports are analogous to antennas in wireless communication. This paper considers a diffusion-based MC SIMO system with a point transmitter and one receiver system with many receiving ports (RxPs). We first characterize the joint channel between the transmitter and RxPs. We then present the optimal maximum-a-posteriori (MAP) decoding for this system when all ports can share complete information and a central device soft-combines the individual signal values to decode the signal. We then consider a Poisson channel approximation for the channel and show that weighted linear combining is an optimal decoding scheme with weights depending on average channel values. We also study a symmetric SIMO system and investigate the decoding error probability and diversity order for various soft and hard combining schemes.
On the Performance of the Primary and Secondary Links in a 3-D Underlay Cognitive Molecular Communication Nithin V. Sabu, Neeraj Varshney, Abhishek K. Gupta IEEE Transactions on Communications, 2021 Molecular communication often involves coexisting links where certain links may have priority over others. In this work, we consider a system in three-dimensional (3-D) space with two coexisting communication links, each between a point transmitter and a spherical fully-absorbing receiver (FAR), where one link (termed primary) has priority over the second link (termed secondary). The system implements the underlay cognitive-communication strategy for the co-existence of both links, which use the same type of molecules for information transfer. The mutual influence of FARs existing in the same communication medium results in competition for capturing the information-carrying molecules. In this work, first, we derive an approximate hitting probability equation for a diffusion-limited molecular communication system with two spherical FARs of different sizes, considering the effect of molecular degradation. The derived equation is then used for the performance analysis of primary and secondary links in a cognitive molecular communication scenario. We show that the simple transmit control strategy at the secondary transmitter can improve the overall system’s performance. We study the influence of molecular degradation and decision threshold on the system performance. We also show that the parameters of the system need to be carefully set to improve the performance.
Target Detection in Clustered Mobile Nanomachine Networks NV Sabu, K Pandey, AK Gupta, S SM IEEE Transactions on Molecular, Biological, and Multi-Scale Communications , 2025 2025 Citations: 1
Electrochemical Communication in Bacterial Biofilms: A Study on Potassium Stimulation and Signal Transmission NV Sabu, BD Unluturk 2024 IEEE Wireless Communications and Networking Conference (WCNC) , 2024 2024 Citations: 2
THz-Based Microfluidic LSPP-Metastructure for the Analysis of Electrochemical Communication in Bacterial Networks AH Naqvi, NV Sabu, W Li, BD Unluturk 2024 IEEE International Black Sea Conference on Communications and … , 2024 2024
On the target detection performance of a molecular communication network with multiple mobile nanomachines NV Sabu, AK Gupta IEEE Transactions on NanoBioscience 23 (3), 524-536 , 2024 2024 Citations: 4
On the caching performance of vehicular networks with platooned traffic NV Sabu, K Pandey, AK Gupta, A Banerjee 2024 IEEE Wireless Communications and Networking Conference (WCNC), 1-6 , 2024 2024 Citations: 2
Molecular Ad Hoc Network with Passive Receivers AK Gupta, L Tyagi, NV Sabu, A Banerjee 2023 21st International Symposium on Modeling and Optimization in Mobile, Ad … , 2023 2023
Channel characterization and performance of a 3-D molecular communication system with multiple fully-absorbing receivers NV Sabu, AK Gupta, N Varshney, A Jindal IEEE Transactions on Communications 71 (2), 714-727 , 2022 2022 Citations: 17
Diversity combining in a single-input-multiple-output molecular communication system AK Gupta, NV Sabu 2022 National Conference on Communications (NCC), 419-424 , 2022 2022 Citations: 3
Impact of multiple fully-absorbing receivers in molecular communications NV Sabu, AK Gupta, N Varshney, A Jindal 2022 IEEE International Conference on Communications Workshops (ICC … , 2022 2022 Citations: 2
On the performance of the primary and secondary links in a 3-D underlay cognitive molecular communication NV Sabu, N Varshney, AK Gupta IEEE Transactions on Communications 69 (12), 8028-8041 , 2021 2021 Citations: 10
Millimeter-Wave and Terahertz Spectrum for 6G Wireless HSD Shuchi Tripathi, Nithin V. Sabu, Abhishek K. Gupta 6G Mobile Wireless Networks, 83-121 , 2021 2021 Citations: 245
Fundamentals of network densification AK Gupta, NV Sabu, HS Dhillon 5G and Beyond: Fundamentals and Standards, 129 , 2021 2021 Citations: 14
3-D diffusive molecular communication with two fully-absorbing receivers: Hitting probability and performance analysis NV Sabu, N Varshney, AK Gupta IEEE Transactions on Molecular, Biological, and Multi-Scale Communications 6 … , 2020 2020 Citations: 26
Detection probability in a molecular communication via diffusion system with multiple fully-absorbing receivers NV Sabu, AK Gupta IEEE Communications Letters 24 (12), 2824-2828 , 2020 2020 Citations: 11
Analysis of diffusion based molecular communication system with multiple transmitters NV Sabu, AK Gupta 2020 International Conference on Signal Processing and Communications (SPCOM … , 2020 2020 Citations: 2
Analysis of diffusion based molecular communication with multiple transmitters having individual random information bits NV Sabu, AK Gupta IEEE Transactions on Molecular, Biological, and Multi-Scale Communications 5 … , 2020 2020 Citations: 13
On hybrid MoSK-CSK modulation based molecular communication: Error rate performance analysis using stochastic geometry NV Sabu, N Varshney, AK Gupta 2019 International Symposium on Modeling and Optimization in Mobile, Ad Hoc … , 2019 2019 Citations: 6
MOST CITED SCHOLAR PUBLICATIONS
Millimeter-Wave and Terahertz Spectrum for 6G Wireless HSD Shuchi Tripathi, Nithin V. Sabu, Abhishek K. Gupta 6G Mobile Wireless Networks, 83-121 , 2021 2021 Citations: 245
3-D diffusive molecular communication with two fully-absorbing receivers: Hitting probability and performance analysis NV Sabu, N Varshney, AK Gupta IEEE Transactions on Molecular, Biological, and Multi-Scale Communications 6 … , 2020 2020 Citations: 26
Channel characterization and performance of a 3-D molecular communication system with multiple fully-absorbing receivers NV Sabu, AK Gupta, N Varshney, A Jindal IEEE Transactions on Communications 71 (2), 714-727 , 2022 2022 Citations: 17
Fundamentals of network densification AK Gupta, NV Sabu, HS Dhillon 5G and Beyond: Fundamentals and Standards, 129 , 2021 2021 Citations: 14
Analysis of diffusion based molecular communication with multiple transmitters having individual random information bits NV Sabu, AK Gupta IEEE Transactions on Molecular, Biological, and Multi-Scale Communications 5 … , 2020 2020 Citations: 13
Detection probability in a molecular communication via diffusion system with multiple fully-absorbing receivers NV Sabu, AK Gupta IEEE Communications Letters 24 (12), 2824-2828 , 2020 2020 Citations: 11
On the performance of the primary and secondary links in a 3-D underlay cognitive molecular communication NV Sabu, N Varshney, AK Gupta IEEE Transactions on Communications 69 (12), 8028-8041 , 2021 2021 Citations: 10
On hybrid MoSK-CSK modulation based molecular communication: Error rate performance analysis using stochastic geometry NV Sabu, N Varshney, AK Gupta 2019 International Symposium on Modeling and Optimization in Mobile, Ad Hoc … , 2019 2019 Citations: 6
On the target detection performance of a molecular communication network with multiple mobile nanomachines NV Sabu, AK Gupta IEEE Transactions on NanoBioscience 23 (3), 524-536 , 2024 2024 Citations: 4
Diversity combining in a single-input-multiple-output molecular communication system AK Gupta, NV Sabu 2022 National Conference on Communications (NCC), 419-424 , 2022 2022 Citations: 3
Electrochemical Communication in Bacterial Biofilms: A Study on Potassium Stimulation and Signal Transmission NV Sabu, BD Unluturk 2024 IEEE Wireless Communications and Networking Conference (WCNC) , 2024 2024 Citations: 2
On the caching performance of vehicular networks with platooned traffic NV Sabu, K Pandey, AK Gupta, A Banerjee 2024 IEEE Wireless Communications and Networking Conference (WCNC), 1-6 , 2024 2024 Citations: 2
Impact of multiple fully-absorbing receivers in molecular communications NV Sabu, AK Gupta, N Varshney, A Jindal 2022 IEEE International Conference on Communications Workshops (ICC … , 2022 2022 Citations: 2
Analysis of diffusion based molecular communication system with multiple transmitters NV Sabu, AK Gupta 2020 International Conference on Signal Processing and Communications (SPCOM … , 2020 2020 Citations: 2
Target Detection in Clustered Mobile Nanomachine Networks NV Sabu, K Pandey, AK Gupta, S SM IEEE Transactions on Molecular, Biological, and Multi-Scale Communications , 2025 2025 Citations: 1
THz-Based Microfluidic LSPP-Metastructure for the Analysis of Electrochemical Communication in Bacterial Networks AH Naqvi, NV Sabu, W Li, BD Unluturk 2024 IEEE International Black Sea Conference on Communications and … , 2024 2024
Molecular Ad Hoc Network with Passive Receivers AK Gupta, L Tyagi, NV Sabu, A Banerjee 2023 21st International Symposium on Modeling and Optimization in Mobile, Ad … , 2023 2023
