Data Communications

Data communications encompasses the principles, technologies and protocols that enable the reliable exchange of digital information across wired, wireless and emerging molecular media. At its core are physical-layer methods such as electrical signalling over copper, optical transmission in fibres and radio-frequency propagation, combined with modulation schemes—ranging from binary signalling to multi-level formats like PAM-4 and multicarrier approaches such as discrete multitone—to maximise spectral efficiency and resilience to channel impairments. Higher layers implement error-control coding, packetisation and routing, organising devices into local, metro and wide-area networks that interoperate via standardised Internet protocols. Transport-layer services (TCP, UDP) abstract end-to-end reliability and ordering, while application-layer protocols (HTTP, DNS, MQTT) support services from web browsing to machine-to-machine messaging in the Internet of Things. Recent advances address ultra-high data rates beyond 100 Gb/s in data-center interconnects, machine-learning-driven resource allocation in dense wireless LANs, and the nascent field of molecular nanonetworks—where chemical concentrations carry bits through microfluidic channels. Together, these developments sustain the global imperative for low-latency, energy-efficient links that underpin cloud computing, 5G mobile broadband, massive IoT deployments and emerging biomedical and environmental applications.

Research from Nature Portfolio

A microfluidic molecular communication platform has been realised in which chemical reactions perform real-time signal processing—shaping, threshold detection, amplification and demodulation—directly in the liquid domain. By encoding binary information in sodium-hydroxide concentration pulses and engineering reaction networks within tailored microchannel geometries, this system transmits text messages over centimetre-scale distances with optimised data rates and error performance, paving the way for biocompatible chemical signal processors without electronic intermediaries.

Practical nanoscale molecular receivers based on graphene field-effect transistor biosensors have been fabricated and integrated into a custom microfluidic testbed. Single-stranded DNA pulses serve as information carriers, and the transistor’s electrical response provides real-time detection. This work delivers the first fully characterised micro/nanoscale molecular communication link, validating theoretical channel models and accelerating applications in the Internet of Nano Things for targeted diagnostics and smart drug delivery.

Research from all publishers

Discrete multitone (DMT) modulation has emerged as a leading candidate for wireline interconnects targeting beyond 100 Gb/s. By dividing the spectrum into numerous orthogonal sub-channels and optimising bit-loading per tone to counter frequency-dependent loss, experimental demonstrations have achieved 200 Gb/s over challenging backplane channels with bit-error rates below 10⁻⁵, while maintaining power and area comparable to high-order pulse-amplitude modulation with decision-feedback equalisation.

In home Wi-Fi networks, a centralised channel-load-aware association mechanism utilises IEEE 802.11k/v measurements to select optimal access points or extenders. By combining received‐signal and link-load metrics, this approach reallocates stations to minimise congestion, reducing latency and boosting aggregate throughput by up to one third compared to traditional signal-strength-based schemes, thereby improving user experience in dense residential deployments.

Data Communications publication trend

The graph below shows the total number of articles in data communications across all publications each year (not limited to Nature Index journals).

Technical terms

Discrete Multitone (DMT): A multicarrier modulation method that partitions the available bandwidth into orthogonal sub-channels, each adaptively loaded with bits to mitigate frequency-selective attenuation.

Bit-loading: An algorithmic process in multicarrier systems that assigns modulation order per sub-channel based on channel signal-to-noise measurements to ensure uniform error performance.

Microfluidic Channel: A miniaturised fluidic conduit designed to transport and mix chemical signals with precise control over reaction kinetics and flow dynamics.

Field-Effect Transistor Biosensor: A semiconductor device whose gate modulation is sensitive to biochemical interactions, converting molecular binding events into measurable electrical signals.

Sodium-Hydroxide Concentration Modulation: A molecular communication scheme encoding digital bits by varying the concentration of NaOH reactants in a microfluidic stream.

References

1. Real-time signal processing via chemical reactions for a microfluidic molecular communication system. Nature Communications (2023).
2. Fabrication and microfluidic analysis of graphene-based molecular communication receiver for Internet of Nano Things (IoNT). Scientific Reports (2021).
3. A Study of Discrete Multitone Modulation for Wireline Links Beyond 100 Gb/s. IEEE Open Journal of Circuits and Systems (2021).
4. Channel Load Aware AP / Extender Selection in Home WiFi Networks Using IEEE 802.11k/v. IEEE Access (2021).
5. Deep Reinforcement Learning-Based Channel Allocation for Wireless LANs With Graph Convolutional Networks. IEEE Access (2020).