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Capacity analysis of a diffusion-based short-range molecular nano-communication channel

机译：基于扩散的短程分子纳米通信通道的容量分析

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摘要

Simulation-based and information theoretic models for a diffusion-based short-range molecular communication channel between a nano-transmitter and a nano-receiver are constructed to analyze information rates between channel inputs and outputs when the inputs are independent and identically distributed (i.i.d.). The total number of molecules available for information transfer is assumed to be limited. It is also assumed that there is a maximum tolerable delay bound for the overall information transfer. Information rates are computed via simulation-based methods for different time slot lengths and transmitter-receiver distances. The rates obtained from simulations are then compared to those computed using information theoretic channel models which provide upper bounds for information rates. The results indicate that a 4-input-2-output discrete channel model provides a very good approximation to the nano-communication channel, particularly when the time slot lengths are large and the distance between the transmitter and the receiver is small. It is shown through an extensive set of simulations that the information theoretic channel capacity with i.i.d. inputs can be achieved when an encoder adjusts the relative frequency of binary zeros to be higher (between 50% and 70% for the scenarios considered) than binary ones, where a 'zero' corresponds to not releasing and a 'one' corresponds to releasing a molecule from the transmitter.
机译：构造了纳米发射器和纳米接收器之间基于扩散的短程分子通信通道的基于仿真和信息理论的模型，以在输入独立且分布均匀时分析通道输入和输出之间的信息速率。假定可用于信息传递的分子总数是有限的。还假定整个信息传输存在最大可容忍的延迟范围。信息速率通过基于仿真的方法针对不同的时隙长度和收发器距离进行计算。然后将从模拟获得的速率与使用信息理论通道模型计算的速率进行比较，该模型为信息速率提供上限。结果表明，4输入2输出离散信道模型为纳米通信信道提供了非常好的近似，特别是当时隙长度较大且发射机与接收机之间的距离较小时。通过广泛的模拟显示，信息理论信道容量为i.d.当编码器将二进制零的相对频率调整为高于二进制零的相对频率时（在所考虑的情况下为50％到70％），可以实现输入，其中“零”对应于不释放，而“ 1”对应于释放来自发射器的分子。

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