C5ISR systems from KNL: Next-generation communications

Open summary

C5ISR systems integrate Command, Control, Communications, Computing, Cyber, Intelligence, Surveillance, and Reconnaissance into a unified operational network, with growing emphasis on real-time, secure, and scalable data exchange.
KNL’s CNHF radios enhance C5ISR effectiveness by offering software-defined, cognitive HF communication with seamless integration capabilities and support for standard interfaces like UDP/IP, SMTP, and XMPP.
The radios offer key benefits for C5ISR: strong AES256 encryption, automatic frequency selection, multihop networking, and fast 0.5-second link establishment, ensuring secure and reliable communication.
Wideband capabilities (up to 300 kbps) allow efficient data transfer even over HF, outperforming legacy systems in speed and resilience.
Designed for scalability and resilience, KNL’s radios maintain communications even under jamming or node failure, making them ideal for decentralised, flexible battlefield networks.

If you work in defence or the military, the acronyms C4ISR and C5ISR probably resonate with you. To sum up the meaning of these terms, C4ISR and C5ISR refer to the technologies, systems, and processes used in defence and military operations to gather, analyse, and distribute information.

More specifically, these systems not only facilitate intelligence gathering but also ensure seamless command and control (C2), secure communications, and advanced data processing, all with a strong focus on cyber resilience.

By improving their C5ISR capabilities, defence forces can make informed decisions, achieve better situational awareness, and effectively coordinate their actions in various operational scenarios.

On this page, we’ll discuss the meaning of C5ISR and explain how KNL’s state-of-the-art CNHF radios can enhance communications, especially in the HF frequency band, by seamlessly integrating into C5ISR systems.

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C5ISR meaning in short

The acronym C5ISR comes from the following words: Command, Control, Communications, Computing, Cyber, Intelligence, Surveillance, and Reconnaissance. The term C5ISR adds ‘Cyber’ to the traditional C4ISR framework and emphasises the importance of cybersecurity, which is now more critical than ever.

From C5ISR to C5ISTAR

In recent years, the industry has also started adopting a new term: C5ISTAR capabilities. C5ISTAR is a term that describes the extensions of the C5ISR concept. C5ISTAR comes from Command, Control, Communications, Computing, Cyber, Intelligence, Surveillance, Target Acquisition and Reconnaissance.

Including Target Acquisition into the existing framework, the term C5ISTAR reflects the complexity of modern military and defence operations, where precision targeting and rapid decision-making are critical. Although KNL’s CNHF products are excellently suited for Target Acquisition applications, we use the acronym C5ISR in this article for clarity.

Modern C5ISR systems place new demands on radio communication technologies

C5ISR systems are designed to integrate various subsystems to provide comprehensive situational awareness and operational control. The C5ISR system can be seen as a ‘System of Systems,’ where all nodes connected by various communication systems function as data transmitters and sensors.

Different communication systems integrated into C5ISR are used for various operational needs, but together, they form a comprehensive data transmission network. HF radios are one communication capacity in this complex system. In many cases, they operate as parallel data transmission channels to make the data exchange network within the C5ISR system resilient, flexible, and scalable – in other words, a battle-resilient system.

Integrating various communication sources, such as radio systems, satellite links, and instant messaging applications, into the C5ISR should be straightforward to guarantee that data transfers support real-time information sharing and decision-making.

KNL’s HF radios

CNHF Manpack part of C5ISR system

How to improve operational communications within the C5ISR system?

KNL’s technology can support the effectiveness of C5ISR systems, particularly in communication. Our software-defined, cognitive networked HF radios are designed to integrate seamlessly into C5ISR systems, improving operational communication capabilities and enhancing the system’s overall functionality.

Traditionally, HF radios have been used only for long-distance communication and operated as standalone systems. Instead, the design of KNL’s HF radio solutions is based on the principle that the radios should operate as part of more extensive communication networks, such as C5ISR systems. Our technology supports several industry-standard interfaces, enabling smooth integrations with other messaging systems.

C5ISR systems require a reliable and secure communication link to handle data exchange between other systems and operators. By ensuring robust data transfer and adaptive connectivity, KNL’s solutions support faster and more informed decision-making across multiple domains, ultimately contributing to more effective communication within a C5ISR system.

The requirements of C5ISR systems in terms of communication – how do KNL’s radios support these?

1) Interoperability

Communication systems integrated into the C5ISR system must operate and exchange information smoothly. KNL’s software-defined radio technology helps establish integrations into complex, multi-layered communication networks, which are characteristic of C5ISR systems.

Many legacy HF radios are designed to meet NATO’s communication standards, but different manufacturers often interpret these standards in varying ways, and as a result, interoperability between radios is not always achieved.

For this reason, KNL’s radios have been designed with a focus on ensuring interoperability at the logical information systems level, rather than merely between radios. Our radios support the standard interfaces listed below, enabling seamless integration with multiple devices and communication systems used in C5ISR.

Our standard interfaces include:

UDP/IP
SMTP and IMAP interfaces for external email clients and servers
XMPP interface for external XMPP clients and servers (enabling integration with NATO’s JChat, for example)

Unlike many legacy HF systems, KNL’s solutions are not standalone; our hardware and software interfaces support easy integration into other battle management systems, such as messaging and chat platforms.

2) Reliability

In a large-scale ‘System of Systems,’ like C5ISR, the reliability of connections is paramount.

KNL’s cognitive radios enhance communication reliability through automatic frequency selection. Our radios can autonomously locate a secure and interference-free HF frequency without user intervention. Continuous spectrum sensing also allows for automatic frequency re-selection if the radio detects jamming or interference, ensuring consistent and secure communication without interruptions.

Read more: How cognitive radio works?

KNL's cognitive radios bring reliability into C5ISR systems

KNL’s cognitive radios ensure reliability of C5ISR systems by autonomously maintaining secure, interference-free communication.

3) Security

The sensitivity of the information transmitted within C5ISR systems highlights the importance of thorough communication encryption. KNL’s radio technology is based on the military-grade AES256 standard, making sure that all data traffic in the network is highly secure.

Our solutions encrypt the communication with 256-bit AES on three levels. All transmitted data, including operational data and internal headers of the transmissions, is encrypted, and the device itself is encrypted with the same algorithm.

4) Bandwidth

The C5ISR system often requires high-bandwidth communication channels to transmit large volumes of data without causing congestion or delays. KNL’s wideband HF radios offer a maximum data transfer rate of 300 kbps, enabling efficient and reliable use of C5ISR services even within the HF frequency range.

Compared to old legacy HF systems, which often had issues with slow data transfer, KNL’s cognitive radios provide significantly faster and more reliable data transmission as part of the C5ISR system.

KNL’s wideband HF radios can intelligently sense the spectrum while noting the data type intended for transmission over the HF frequency. Thanks to our advanced ALE technology, KNL’s radios can establish a connection in as little as 0.5 seconds and smartly utilise the bandwidth, sending data in bursts when necessary.

5) Flexibility

Constantly changing operational requirements and environments means communication systems integrated into the C5ISR must also be flexible.

KNL’s radios operate with an adaptive waveform, which allows the device to dynamically adjust to changing environmental conditions in real-time. The radio can automatically switch frequencies for each message based on the conditions without any user intervention. These automatic adjustments ensure a more resilient and reliable communication link, particularly in environments where interference, jamming, or poor signal conditions might disrupt communication.

6) Scalability

A C5ISR system should also be scalable regarding users, devices, and data sources to support various operational needs.

While traditional HF radios are typically used to send messages point-to-point, KNL’s radios are always connected to a network.

The multihop capability enables our network to scale geographically and across different network types. If a direct connection is not possible, multihop technology automatically relays the message through other radios in the network, ensuring robust message delivery and communication reliability.

KNL’s radios can function as long-range communication tools for reconnaissance teams or as backup links between command centres, offering scalability for multiple missions. Our product range features the mountable CNHF1 rack radio and the innovative wideband HF Manpack Radio.

7) Resilience

Redundancy and diversity in communication paths are essential for maintaining resilience within a C5ISR system.

KNL’s data transmission solutions highlight the battle-hardened design of our radios. Unlike systems with a single point of failure, where the destruction of one node can damage the entire network, KNL radios create a decentralised communication system. This decentralised architecture, combined with our multihop technology, provides resilience by ensuring that the radio automatically seeks an alternative route to maintain stable connections even if one connection is disrupted.

Our radios can self-correct and restore to normal functioning even when facing disruptions. For instance, when noticing jamming, the radios will find and switch to free and secure frequencies, thus maintaining communication. When the interference no longer exists, connections automatically return to optimal state.