Area Rate Efficiency in Molecular Communications
Brand L, Lotter S, Jamali V, Schober R (2021)
Publication Type: Conference contribution
Publication year: 2021
Publisher: ASSOC COMPUTING MACHINERY
City/Town: NEW YORK
Conference Proceedings Title: PROCEEDINGS OF THE 8TH ACM INTERNATIONAL CONFERENCE ON NANOSCALE COMPUTING AND COMMUNICATION (ACM NANOCOM 2021)
Event location: , ELECTR NETWORK
Abstract
We consider a multiuser diffusion-based molecular communication (MC) system where multiple spatially distributed transmitter (TX)-receiver (RX) pairs establish point-to-point communication links employing the same type of signaling molecules. To realize the full potential of such a system, an in-depth understanding of the interplay between the spatial user density and inter-user interference (IUI) and its impact on system performance in an asymptotic regime with large numbers of users is needed. In this paper, we adopt a three-dimensional (3-D) system model with multiple independent and spatially distributed point-to-point transmission links, where both the TXs and RXs are positioned according to a regular hexagonal grid, respectively. Based on this model, we first derive an expression for the channel impulse responses (CIRs) of all TX-RX links in the system. Then, we provide the maximum likelihood (ML) decision rule for the RXs and show that it reduces to a threshold-based detector. We derive an analytical expression for the corresponding detection threshold which depends on the statistics of the MC channel and the statistics of the IUI. Furthermore, we derive an analytical expression for the bit error rate (BER) and the achievable rate of a single transmission link. Finally, we propose a new performance metric, which we refer to as area rate efficiency (ARE), that captures the tradeoff between the user density and IUI. The ARE characterizes how efficiently given TX and RX areas are used for information transmission and is given in terms of bits per area unit. We show that there exists an optimal user density for maximization of the ARE. Results from particle-based and Monte Carlo simulations validate the accuracy of the expressions derived for the CIR, optimal detection threshold, BER, and ARE.
Authors with CRIS profile
Lukas Brand
Lehrstuhl für Digitale Übertragung (IDC)
Sebastian Lotter
Lehrstuhl für Digitale Übertragung (IDC)
Robert Schober
Lehrstuhl für Digitale Übertragung (IDC)
Involved external institutions
United States (USA) (US)How to cite
APA:
Brand, L., Lotter, S., Jamali, V., & Schober, R. (2021). Area Rate Efficiency in Molecular Communications. In PROCEEDINGS OF THE 8TH ACM INTERNATIONAL CONFERENCE ON NANOSCALE COMPUTING AND COMMUNICATION (ACM NANOCOM 2021). , ELECTR NETWORK: NEW YORK: ASSOC COMPUTING MACHINERY.
MLA:
Brand, Lukas, et al. "Area Rate Efficiency in Molecular Communications." Proceedings of the 8th ACM International Conference on Nanoscale Computing and Communication (ACM NANOCOM), , ELECTR NETWORK NEW YORK: ASSOC COMPUTING MACHINERY, 2021.
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