Modern organisations depend on connectivity for far more than email and web browsing. Voice calls, video conferencing, cloud applications, telemetry, remote control systems, live video and operational data may all share the same network connections.
But those applications do not have the same requirements.
A large file transfer can usually tolerate a short delay without anyone noticing. A live video stream cannot. A voice call is particularly sensitive to latency and jitter, while operational telemetry may involve relatively little data but require continuous, reliable delivery.
This creates a problem for conventional approaches to connectivity. Simply providing more bandwidth does not necessarily ensure that the applications that matter most receive the network performance they need.
Application-aware bonding takes a more intelligent approach. It combines multiple available connections while recognising that different applications have different performance requirements, allowing critical traffic to be prioritised and managed accordingly.
For organisations operating in mobile, remote or mission-critical environments, that can make the difference between simply having an internet connection and having connectivity that is genuinely fit for purpose.
What is application-aware bonding?
Application-aware bonding combines multiple network connections into a managed connectivity service while taking account of the applications using those connections.
Traditional network bonding concentrates primarily on the available connectivity. Multiple connections – such as 4G, 5G, satellite, Wi-Fi or fixed-line services – can be combined to provide greater bandwidth and resilience.
Application-aware bonding adds another layer of intelligence.
Rather than treating all traffic in exactly the same way, the network can recognise the requirements of different applications and make decisions about how their traffic should be handled.
That might mean prioritising a video stream over a software update, protecting a voice call from congestion or ensuring that operational telemetry continues to flow when available bandwidth deteriorates.
The objective isn’t simply to create a bigger connection. It is to make better use of all the connectivity available.
Why isn’t more bandwidth enough?
It is easy to assume that network performance is principally a question of bandwidth.
If a connection is struggling, adding more bandwidth sounds like the obvious solution. But application performance depends on several other factors, including:
- latency
- jitter
- packet loss
- congestion
- connection stability
- changes in network performance
A connection can therefore have substantial theoretical bandwidth while still delivering poor application performance.
This becomes particularly important in mobile environments.
A vehicle might have access to several 4G and 5G networks, for example, but their performance can change constantly as the vehicle moves between cells, encounters areas of congestion or travels through locations with weaker coverage.
Satellite connectivity introduces different characteristics again, particularly in terms of latency.
An intelligent bonding platform can use these different connections together rather than expecting a single bearer to provide everything.
But application awareness takes this further by considering what the connectivity is actually being used for.
How does application-aware bonding work?
At a simplified level, application-aware bonding sits between the available network connections and the applications that depend upon them.
The bonding platform can monitor the performance of the underlying connections and manage traffic across them.
Depending upon the implementation, this can take into account factors such as available bandwidth, latency, packet loss, connection quality and the requirements or priority of different traffic.
Imagine a mobile command vehicle with four available connections:
5G network A – high bandwidth and low latency
5G network B – good bandwidth but becoming congested
4G network C – lower bandwidth but stable
Satellite – wide coverage but higher latency
At the same time, the vehicle might be transmitting:
live HD video
VoIP communications
operational telemetry
cloud application traffic
large background file transfers
Those applications should not necessarily be treated equally.
Application-aware networking enables the connectivity platform to make more intelligent decisions about how the available network resources are used.
Application-aware bonding vs conventional WAN bonding
WAN bonding combines multiple WAN connections so that they can contribute towards the performance and resilience of the overall connection.
This is already a major improvement over relying upon a single network.
If several connections are bonded, an organisation is no longer entirely dependent upon the availability or performance of one bearer.
Application-aware bonding builds upon this principle.
Instead of asking only:
“Which connections are available?”
the network can effectively also consider:
“Which applications need connectivity, and what type of performance do they require?”
That distinction becomes increasingly important as networks support more complex operations.
A conventional bonded connection might successfully increase the overall capacity available to an organisation. Application-aware bonding is concerned with ensuring that capacity is used intelligently.
Why different applications need different network performance
There is no single definition of a “good” connection because applications respond differently to network conditions.
Voice communications
Voice generally requires relatively little bandwidth, but it is highly sensitive to latency, jitter and packet loss.
Giving a voice application access to enormous bandwidth doesn’t solve the problem if packets arrive too late or inconsistently.
Maintaining stable, low-latency connectivity can therefore be more important than maximising throughput.
Live video
Live video requires considerably more bandwidth and also needs consistent data delivery.
A sudden reduction in available capacity can result in buffering, lower image quality or interruption.
This makes live broadcasting, surveillance feeds and remote video particularly suitable applications for intelligent multi-network connectivity.
Telemetry and IoT
Telemetry data may consume comparatively little bandwidth, but the information can be operationally important.
For an autonomous system, connected vehicle or remote monitoring platform, maintaining the flow of telemetry can matter more than completing a large background download quickly.
Cloud applications
Cloud-based applications can generate many simultaneous connections and are increasingly central to day-to-day operations.
Performance problems can therefore affect everything from collaboration and document access to specialist operational software.
File transfers
Large file transfers may require considerable bandwidth but are often relatively tolerant of small delays.
In a constrained network environment, they may therefore be a lower priority than voice, video or operational traffic.
This is the fundamental principle behind application awareness: importance cannot be measured simply by the amount of bandwidth an application consumes.
What happens when network conditions change?
This is where intelligent bonding becomes particularly valuable.
Network performance is rarely static, especially when connectivity is being delivered to something that moves.
A 5G connection that is performing exceptionally well at one location may deteriorate several miles later. A cellular network can become congested. Satellite availability may change. Wi-Fi may appear or disappear.
Application-aware bonding can form part of a connectivity architecture designed to respond dynamically to these changing conditions.
Instead of building an operation around the assumption that its preferred network will always be available, multiple bearers can form part of the connectivity service.
The aim is to maintain application performance even when the underlying connectivity changes.
Application-aware bonding and Quality of Service
Application awareness and Quality of Service (QoS) are closely related concepts, but they aren’t identical.
QoS is used to classify and prioritise different types of network traffic. For example, voice traffic can be given priority over less time-sensitive data.
Application-aware bonding extends this principle into a multi-network environment.
The challenge is no longer simply deciding which traffic should receive priority across one connection. The platform potentially has several different connections, each with different performance characteristics.
This provides much greater scope for intelligent traffic management.
Why application-aware bonding matters for communications on the move
Mobile connectivity is one of the clearest use cases.
Fixed offices can often rely upon high-quality fibre connections with predictable performance. Vehicles, vessels, temporary sites and remote operations don’t have that luxury.
They may need to combine:
4G + 5G + satellite + Wi-Fi + other available terrestrial connections
while moving between locations and coverage areas.
This makes the underlying connectivity inherently variable.
Application-aware bonding allows organisations to design around that reality.
Instead of attempting to find one perfect network, they can use multiple imperfect networks intelligently.
This is particularly relevant to Livewire’s concept of hybrid connectivity, where different communications technologies work together to provide a more resilient service.
Critical communications and operational resilience
The implications become even more significant when connectivity supports critical operations.
Emergency services, defence organisations, utilities, transport operators and other critical infrastructure users may depend upon communications in environments where conventional connectivity is under pressure.
During a major incident, for example, cellular networks can become congested at precisely the moment when communications are most important.
A resilient connectivity architecture therefore needs to consider more than normal operating conditions.
What happens when bandwidth falls?
What happens when latency increases?
What happens when a mobile connection disappears?
And, crucially, which applications must continue operating when network resources become constrained?
Application-aware bonding provides a framework for answering that final question.
Application-aware connectivity for autonomous systems
Autonomous and remotely operated systems introduce another important requirement: continuous operational visibility.
An autonomous vehicle, uncrewed aircraft or maritime platform may generate several different categories of data simultaneously.
These could include telemetry, navigation information, command-and-control traffic, sensor data, video and maintenance information.
Some of these data flows may be more time-critical than others.
As autonomous systems become increasingly dependent upon hybrid communications, intelligent management of those connections becomes essential.
This is particularly relevant where operations move beyond the reliable coverage of a single terrestrial network.
Broadcast and live streaming
Broadcasting provides another clear example of why application-aware bonding matters.
Live video contribution can consume substantial bandwidth, particularly at higher resolutions and bitrates.
At the same time, the production team may also require voice communications, cloud access and other data services.
Cellular bonding has transformed outside broadcasting by enabling multiple mobile connections to contribute to a transmission. Application-aware networking develops the same principle further by considering the competing applications using the available connectivity.
The result is a network designed around the requirements of the production rather than simply the number of connections available.
Maritime and remote connectivity
Ships and remote installations increasingly have access to a mixture of connectivity options.
These can include cellular services near shore, Wi-Fi in ports and satellite networks offshore.
Rather than switching manually between them or treating satellite as an entirely separate connection, hybrid networking can bring them together.
Application awareness can then help determine how the resulting connectivity is used.
Operational data, crew communications, cloud applications and passenger services do not necessarily need identical treatment.
That becomes increasingly important when the most expensive or capacity-constrained connection is also the only connection available.
Application-aware bonding and network resilience
Resilience is often described simply in terms of redundancy.
If connection A fails, connection B takes over.
That is useful, but it is only one level of resilience.
Real networks don’t always fail completely. They degrade.
Packet loss can increase. Latency can rise. Bandwidth can fall. Congestion can appear intermittently.
A connection may therefore remain technically “up” while delivering performance that is unsuitable for a particular application.
This is one reason intelligent network bonding can offer advantages over basic failover.
The question isn’t merely whether a connection is available. It is whether it is currently capable of supporting the application that needs it.
Application-aware bonding vs load balancing
Load balancing distributes network traffic across multiple connections.
Its purpose is generally to use the available resources efficiently and prevent one connection from becoming overloaded.
Application-aware bonding has a different emphasis.
Rather than simply spreading traffic, it can take the requirements of the applications into account as part of how connectivity is managed.
For example, sending equal quantities of data across two connections isn’t necessarily useful if one has significantly higher latency and the application is highly latency-sensitive.
This is why intelligent connectivity requires more than simply dividing traffic evenly between available WAN links.
The role of software-defined networking
Software-defined networking allows network behaviour to be controlled through software rather than being determined solely by fixed hardware configurations.
This is particularly powerful in bonding environments.
As network conditions change, software can monitor performance and make decisions about how available connectivity is used.
That allows a multi-network service to become dynamic rather than static.
Instead of configuring a primary connection and waiting for it to fail, the network can continuously make use of the connectivity resources available to it.
This is increasingly important as organisations combine terrestrial and satellite communications into hybrid networks.
From network availability to application availability
Perhaps the most useful way to understand application-aware bonding is to change the question being asked.
Traditional connectivity asks:
“Is the network connected?”
Application-aware connectivity asks:
“Can the application perform properly?”
Those are very different measures.
A router can show that every connection is technically online while users experience frozen video, broken voice calls or slow operational systems.
For organisations whose operations depend upon connectivity, network availability alone is therefore an incomplete measure of resilience.
The ultimate objective is application availability.
Building more intelligent hybrid networks
As organisations become increasingly dependent upon cloud applications, mobile operations, autonomous systems and real-time data, connectivity architectures need to become more intelligent.
No individual network can guarantee perfect coverage, capacity and latency everywhere.
The alternative is to combine multiple networks and manage them dynamically.
Livewire’s RazorLink technology is designed around this principle, bringing different connectivity bearers together to create resilient hybrid connectivity.
Application-aware bonding represents an important evolution of that approach because it recognises that connectivity exists to support applications – and that those applications have different priorities.
The result is a network that doesn’t simply ask how much bandwidth is available.
It asks how that bandwidth can best be used.
Frequently Asked Questions
What is application-aware bonding?
Application-aware bonding combines multiple network connections while taking account of the requirements and priority of different applications. It allows connectivity resources to be managed more intelligently than simply treating every type of network traffic equally.
How is application-aware bonding different from WAN bonding?
WAN bonding combines multiple internet or WAN connections to improve connectivity, bandwidth and resilience. Application-aware bonding adds intelligence about the applications using that connectivity, helping prioritise traffic according to its requirements.
Does application-aware bonding reduce latency?
Bonding cannot remove the physical latency inherent in an underlying network, but intelligent traffic management can help applications make better use of available connections. Where several networks have different performance characteristics, latency-sensitive traffic can potentially be treated differently from less time-critical traffic.
Can application-aware bonding reduce packet loss?
Multi-network bonding can improve resilience to degradation on an individual connection. Intelligent platforms can monitor network conditions and use available connectivity to help maintain application performance when one bearer experiences packet loss or other problems.
What applications benefit most from application-aware bonding?
Applications that are sensitive to latency, jitter, packet loss or interruptions can benefit particularly strongly. Examples include VoIP, live video, telemetry, remote operations, command-and-control systems and other mission-critical applications.
Is application-aware bonding the same as load balancing?
No. Load balancing generally distributes traffic between multiple connections to make efficient use of available capacity. Application-aware bonding considers the requirements of different applications as part of how multi-network connectivity is managed.
What networks can be used for application-aware bonding?
A hybrid connectivity solution can potentially combine different network technologies, including 4G, 5G, fixed broadband, Wi-Fi and satellite connectivity, depending upon the system and deployment.
Why is application-aware bonding useful for mobile environments?
Mobile network performance changes as vehicles, vessels or other platforms move between locations and coverage areas. Application-aware bonding can form part of a multi-network architecture designed to maintain important application traffic despite those changing conditions.
Is application-aware bonding suitable for critical communications?
It can be particularly valuable where applications have different operational priorities and connectivity needs to remain resilient when individual networks degrade or become unavailable.
What happens if one connection fails during network bonding?
In a properly designed bonded multi-network environment, other available connections can continue carrying traffic. This provides greater resilience than an architecture that depends entirely upon a single connection, although the precise behaviour depends on the bonding platform and configuration.
