Microfluidic Communications Protocol Design and Transmission Performance Analysis
Wirdatmadja, Stefanus Arinno (2014)
2014
Master's Degree Programme in Electrical Engineering
Tieto- ja sähkötekniikan tiedekunta - Faculty of Computing and Electrical Engineering
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Hyväksymispäivämäärä
2014-12-03
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201412031564
https://urn.fi/URN:NBN:fi:tty-201412031564
Tiivistelmä
The new field of nanocommunications aims to develop communication systems at the nanoscale. It has developed into two main communication directions: molecular communications andelectromagnetic communications. Microfluidic communications is a subtype of molecular communications. Existing liquid based microfluidics applications are the main target for the integration of a communication feature.
Currently, there are still no standards for microfluidics communications protocol. The protocols should consider particular phenomena such as noise, transmission access priorities, and probability of coalescence between microdroplets. Those phenomena bring challenges in protocol development of microfluidics communications.
In this thesis, the protocol stack for microfluidics communications is developed. Starting from the physical layer, feasible modulation schemes for data transmission suitable for microfluidics communications is examined. Later, medium access control layer protocols is discussed in order to optimize transmission medium access for the network entities. This is done to avoid droplet coalescence. Specification of the addressing and routing methods is defined to ensure data submission to the destination point. Finally, the performance of the proposed schemes and numerical comparison to viable alternatives are analyzed.
The results of the evaluation are reached through MATLAB software simulations. This work concentrates on Communication through Silence (CtS) where the payload is represented as distance between two droplets. Two schemes of CtS (decimal and hexadeximal) are investigated. Both CtS schemes with particular optimum amount binary payload outperforms OOK in throughput performance. The fairness of the transmission system can be achieved for a decentralized system by combining slotted (TDMA) scheme and a probability-based algorithm.
Currently, there are still no standards for microfluidics communications protocol. The protocols should consider particular phenomena such as noise, transmission access priorities, and probability of coalescence between microdroplets. Those phenomena bring challenges in protocol development of microfluidics communications.
In this thesis, the protocol stack for microfluidics communications is developed. Starting from the physical layer, feasible modulation schemes for data transmission suitable for microfluidics communications is examined. Later, medium access control layer protocols is discussed in order to optimize transmission medium access for the network entities. This is done to avoid droplet coalescence. Specification of the addressing and routing methods is defined to ensure data submission to the destination point. Finally, the performance of the proposed schemes and numerical comparison to viable alternatives are analyzed.
The results of the evaluation are reached through MATLAB software simulations. This work concentrates on Communication through Silence (CtS) where the payload is represented as distance between two droplets. Two schemes of CtS (decimal and hexadeximal) are investigated. Both CtS schemes with particular optimum amount binary payload outperforms OOK in throughput performance. The fairness of the transmission system can be achieved for a decentralized system by combining slotted (TDMA) scheme and a probability-based algorithm.