eSIM Localization for Global IoT Projects

Steffen Sorrell -
SIM localization
Illustration: © IoT For All

While we now arguably live in the era of ubicomp (ubiquitous computing) thanks to smartphones and data connectivity provided by MNOs (mobile network operators), ubicomp’s machine-focused sibling, IoT, remains at a relatively nascent stage. The ubicomp era arrived roughly around 2010; given that the term was coined roughly a decade earlier than IoT, is it safe to assume that the IoT era is now ready for lift-off? The truth is that communication efforts and computing advances, especially on the mobile network side, have heavily focused on delivering new and improved experiences for human-to-human communication.

Today, we find ourselves inside a perfect storm to catalyze IoT growth. The COVID-19 pandemic has highlighted the importance of remote monitoring, automation, connectivity, and digitization when business is no longer ‘business as usual. Hardware costs have continually fallen over the years, while cloud computing offers powerful analytics capabilities anytime, anywhere.

Connectivity remains a challenge. IoT customers above all need reliability for their investments. This means near-100% coverage alongside an ecosystem that meets their requirements in application performance, power consumption, cost, and flexibility. This blog will investigate what this all means and why eSIM localization is a critical enabler.

What Is eSIM localisation?

Traditional cellular IoT has been enabled by roaming. When devices are produced, it is often unknown at the outset where they will operate in the world. Roaming SIMs have offered a solution to this problem by simplifying deployments: large MNOs can provide customers with good (~80%) global coverage through bilateral roaming agreements and broad roaming alliance partnerships. Theoretically, IoT customers can establish a connectivity contract with an operator and deploy their devices anywhere in the world.

Unfortunately, this model is not as reliable as IoT customers require. SIM is tied to the contracted operator, which means that coverage and costs are not always optimal. Meanwhile, if the operator’s roaming agreements run into any trouble, the customer has significant cost implications to ensure that devices remain online.

eSIM localization provides a superior solution to this conundrum. In the first instance, eSIM decouples the SIM from the operator: network providers can be switched remotely, offering an unparalleled level of flexibility in terms of connectivity. Even more importantly, this flexible framework allows customers to avoid the roaming model altogether by downloading and activating a local operator’s connectivity profile.

Why eSIM Localization?

To understand why eSIM localization is so important, we’ll need to look at some of its benefits and why it offers the reliability IoT customers need for their projects.

Lower Total Cost of Ownership

Nevertheless, IoT projects are long-term investments: devices are often in the field for a decade or more. eSIM requires more upfront investment than traditional SIM solutions. This is because the hardware is more expensive, and providers’ capital investments into eUICC (the eSIM over-the-air software systems) must be recouped to support the ecosystem. At this point, TCO (Total Cost of Ownership) becomes a critical metric. As mentioned earlier, traditional roaming SIMs carry an element of risk with them. If network coverage is poor, or devices land in countries outside of an operator’s main roaming footprint, or even if operators cancel or change roaming agreements, customer costs can quickly spiral out of control. By localizing the SIM card with eSIM, these risks and unforeseen costs can be avoided, lowering the overall TCO.

Permanent Roaming

Around the world, telecom regulators and MNOs are becoming increasingly concerned with the prospect of permanent IoT roaming: when IoT devices roam on a foreign network for longer than 90 consecutive days. Typical concerns include cross-border migration of data, network performance, and capacity issues, in addition to price pressure on the wholesale market. Typically, an operator can achieve five times more revenue by selling connectivity at retail rather than wholesale rates, and initiatives such as ‘roam like at home,’ wholesale price cap introductions in addition to intense competition on the market mean that these rates will only trend further down into the medium-term.

eSIM localization means that permanent roaming is no longer an issue. Connectivity and data processing can be serviced locally, avoiding regulatory concerns while offering operators a more competitive play on the IoT market.

Application and Power Performance

One aspect that is often overlooked in roaming is the issue of performance. Traditional roaming normally employs a ‘home routed architecture, where data travels from the visited operator to the home operator and then back to the visited operator. From an MNO standpoint, home routing is relatively simple to implement from a billing perspective and is thus pervasive in the industry. However, additional costs are incurred in transporting the data due to the traffic routing model, while customer latency is impacted, reducing application performance. This makes roaming unsuitable for latency-sensitive Applications.

Importantly, IoT is heavily focused on power efficiency. Many devices are battery-operated and cannot afford the additional power demands imposed by roaming steering technology, which might force roaming connections onto networks that offer lower costs for MNOs (thanks to discount agreements) without regard to signal quality. Meanwhile, devices using Low Power Wide Area Network (LPWAN) technologies such as NB-IoT and LTE-M rely on power-saving features built into the standard such as Power Saving Mode (PSM) and Extended Discontinuous Reception (eDRX). PSM and eDRX are rarely enabled by operators in roaming scenarios, resulting in dramatic battery life reductions.

eSIM localization avoids home-routed roaming architectures while also allowing LPWAN devices to access the full suite of power-saving features. Customers can enjoy improved application performance in addition to longer lifecycles for power-constrained devices.

Steffen Sorrell - Chief of Research, Kaleido Intelligence

Eseye is a leader in global IoT connectivity solutions, bringing the deep expertise needed to integrate and optimise device connectivity across 190 countries and over 700 networks, delivering near-100% uptime. We bring decades of end-to-end exper...
Eseye is a leader in global IoT connectivity solutions, bringing the deep expertise needed to integrate and optimise device connectivity across 190 countries and over 700 networks, delivering near-100% uptime. We bring decades of end-to-end exper...