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Shannon meets fick on the microfluidic channel : diffusion limit to sum broadcast capacity for molecular communication

Bicen, A. Ozan; Lehtomäki, Janne J.; Akyildiz, Ian F. (2018-02-13)

 
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https://doi.org/10.1109/TNB.2018.2805766

Bicen, A. Ozan
Lehtomäki, Janne J.
Akyildiz, Ian F.
Institute of Electrical and Electronics Engineers
13.02.2018

A. O. Bicen, J. J. Lehtomäki and I. F. Akyildiz, "Shannon Meets Fick on the Microfluidic Channel: Diffusion Limit to Sum Broadcast Capacity for Molecular Communication," in IEEE Transactions on NanoBioscience, vol. 17, no. 1, pp. 88-94, Jan. 2018. doi: 10.1109/TNB.2018.2805766

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doi:https://doi.org/10.1109/TNB.2018.2805766
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Abstract

Molecular communication (MC) over a microfluidic channel with flow is investigated based on Shannon’s channel capacity theorem and Fick’s laws of diffusion. Specifically, the sum capacity for MC between a single transmitter and multiple receivers (broadcast MC) is studied. The transmitter communicates by using different types of signaling molecules with each receiver over the microfluidic channel. The transmitted molecules propagate through microfluidic channel until reaching the corresponding receiver. Although the use of different types of molecules provides orthogonal signaling, the sum broadcast capacity may not scale with the number of the receivers due to physics of the propagation (interplay between convection and diffusion based on distance). In this paper, the performance of broadcast MC on a microfluidic chip is characterized by studying the physical geometry of the microfluidic channel and leveraging the information theory. The convergence of the sum capacity for microfluidic broadcast channel is analytically investigated based on the physical system parameters with respect to the increasing number of molecular receivers. The analysis presented here can be useful to predict the achievable information rate in microfluidic interconnects for the biochemical computation and microfluidic multi-sample assays.

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