Published online by Cambridge University Press: 05 September 2013
We learned in Chapter 3 that molecular communication provides a ubiquitous method by which natural bionanomachines communicate. In the simplest model, a group of bionanomachines acting as sender bio-nanomachines transmit information carrying signal molecules, called information molecules in this chapter, the information molecules propagate in the environment, and a group of bio-nanomachines acting as receiver bionanomachines chemically react to the propagating molecules. In this chapter, we first describe a simple model of molecular communication with the goal of identifying key components and processes necessary for design and analysis of molecular communication systems. We then discuss from the communication engineering point of view the need for a network architecture that extends the simple model and allows system designers to integrate a group of bio-nanomachines into a functional and robust molecular communication system.
Molecular communication model
A starting requirement in molecular communication research is to generalize communication processes and develop a basic model of molecular communication. A variety of designs and mechanisms of molecular communication appear in biological systems (e.g., natural biological cells communicate through transmission of diffusive molecules, protein-nanomachines transport materials by propagating themselves over protein filaments). Abstraction of the naturally occurring molecular communication systems may help identify key components and processes and provide a basis for design and analysis of a wide variety of molecular communication systems.
The basic model of molecular communication may be described based on Shannon's model of communication (Figure 4.1) [1, 2, 3, 4, 5].
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