Abhinanda Dutta | Drexel University (original) (raw)
Drafts by Abhinanda Dutta
A cellular automaton is a discrete model studied in computability theory , mathematics, physics a... more A cellular automaton is a discrete model studied in computability theory , mathematics, physics and myriad of other areas. It's profound application makes it indispensable in the scientific community. This paper is intended to provide an overview of the concept of cellular automata and it's application in different areas. In this report I have highlighted some general application of cellular automata with the later section of the paper emphasizing more on the application of cellular automata in the field of parallel computing.
The main issues faced by the low power communication standards are its inability to communicate o... more The main issues faced by the low power communication standards are its inability to communicate over a fairly long distance. This paper focuses on a fairly new connectivity protocol known as the LoRa which is gaining importance in the world of IoT for its capability to communicate over a long range while exploiting the low power advantages of the conventional LPWAN(Low Power Wide Area Network) protocol. We have discussed the LoRa standard here along with its advantages over other protocols like Zigbee, Bluetooth, Z-wave which till now are reigning the low power wireless connectivity domain.
Papers by Abhinanda Dutta
2022 58th Annual Allerton Conference on Communication, Control, and Computing (Allerton)
2020 Information Theory and Applications Workshop (ITA), 2020
Channel assignment for wireless radios employing random access is found in several contexts, incl... more Channel assignment for wireless radios employing random access is found in several contexts, including low-power wide area network (LPWAN) protocols such as LoRaWAN. This paper considers the assignment of a set of N radios to M available channels with the objective of maximizing the sum throughput. The difficulty lies in the facts that i) the radios connect to the access point (or gateway) over independent erasure channels and ii) the radios are subject to collision, i.e., if two or more packets arrive at the access point on the same channel then all such packets "collide" and are lost. The problem is approached by defining lower and upper bounds on the throughput, and then extremizing the bounds. Initial numerical results for M = 2 channels suggest i) there is notable variation in sum throughput across problem instances, but ii) the impact of scheduling on the throughput for a given problem instance is relatively small.
2021 19th International Symposium on Modeling and Optimization in Mobile, Ad hoc, and Wireless Networks (WiOpt)
Throughput extremization is an important facet of performance modeling for low-power wide-area ne... more Throughput extremization is an important facet of performance modeling for low-power wide-area network (LP-WAN) wireless networks (e.g., LoRaWAN) as it provides insight into the best and worst case behavior of the network. Our previous work on throughput extremization established lower and upper bounds on throughput for random access channel assignment over a collision erasure channel in which the lower bound is expressed in terms of the number of radios and sum load on each channel. In this paper the lower bound is further characterized by identifying two local minimizers (a load balanced assignment and an imbalanced assignment) where the decision variables are the number of radios assigned to each channel and the total load on each channel. A primary focus is to characterize how macro-parameters of the optimization, i.e., the total number of radios, their total load, and the minimum load per radio, determine the regions under which each of the local minimizers is in fact the global minimizer.
A cellular automaton is a discrete model studied in computability theory , mathematics, physics a... more A cellular automaton is a discrete model studied in computability theory , mathematics, physics and myriad of other areas. It's profound application makes it indispensable in the scientific community. This paper is intended to provide an overview of the concept of cellular automata and it's application in different areas. In this report I have highlighted some general application of cellular automata with the later section of the paper emphasizing more on the application of cellular automata in the field of parallel computing.
The main issues faced by the low power communication standards are its inability to communicate o... more The main issues faced by the low power communication standards are its inability to communicate over a fairly long distance. This paper focuses on a fairly new connectivity protocol known as the LoRa which is gaining importance in the world of IoT for its capability to communicate over a long range while exploiting the low power advantages of the conventional LPWAN(Low Power Wide Area Network) protocol. We have discussed the LoRa standard here along with its advantages over other protocols like Zigbee, Bluetooth, Z-wave which till now are reigning the low power wireless connectivity domain.
2022 58th Annual Allerton Conference on Communication, Control, and Computing (Allerton)
2020 Information Theory and Applications Workshop (ITA), 2020
Channel assignment for wireless radios employing random access is found in several contexts, incl... more Channel assignment for wireless radios employing random access is found in several contexts, including low-power wide area network (LPWAN) protocols such as LoRaWAN. This paper considers the assignment of a set of N radios to M available channels with the objective of maximizing the sum throughput. The difficulty lies in the facts that i) the radios connect to the access point (or gateway) over independent erasure channels and ii) the radios are subject to collision, i.e., if two or more packets arrive at the access point on the same channel then all such packets "collide" and are lost. The problem is approached by defining lower and upper bounds on the throughput, and then extremizing the bounds. Initial numerical results for M = 2 channels suggest i) there is notable variation in sum throughput across problem instances, but ii) the impact of scheduling on the throughput for a given problem instance is relatively small.
2021 19th International Symposium on Modeling and Optimization in Mobile, Ad hoc, and Wireless Networks (WiOpt)
Throughput extremization is an important facet of performance modeling for low-power wide-area ne... more Throughput extremization is an important facet of performance modeling for low-power wide-area network (LP-WAN) wireless networks (e.g., LoRaWAN) as it provides insight into the best and worst case behavior of the network. Our previous work on throughput extremization established lower and upper bounds on throughput for random access channel assignment over a collision erasure channel in which the lower bound is expressed in terms of the number of radios and sum load on each channel. In this paper the lower bound is further characterized by identifying two local minimizers (a load balanced assignment and an imbalanced assignment) where the decision variables are the number of radios assigned to each channel and the total load on each channel. A primary focus is to characterize how macro-parameters of the optimization, i.e., the total number of radios, their total load, and the minimum load per radio, determine the regions under which each of the local minimizers is in fact the global minimizer.