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A service experience of the early 2030s – and what still won’t be identical
In summary – what to know:
- Seamless, not identical – Bhattacharjee expects a mobile service experience by the early 2030s, with a device identity and subscription, but says that terrestrial broadband is not available everywhere.
- Managing the hype – Barani counts around 280 MNO-satellite partnerships, 120 to 125 of them directly on device, but today calls the services embryonic and the ITU 6G targets beyond what NTN can offer.
- The control-plane fight – Barani is “not sure” that one core controlling both segments is feasible; Bhattacharjee calls converged authentication, policy and orchestration “certainly very realistic.”
Most direct-to-device services live today share a structural limitation: the radio was standardized, but the operating model was not. In most deployments, the satellite still runs through a separate core accessed via a roaming-style interface, so a handover is really a re-attach. Getting to one core, one subscriber and one unchanged terminal is the work of the next few years.
6G is where this convergence is meant to be designed rather than bolted on. This question ran through the NTN Integration Forum that RCR Wireless News hosted on September 8th. The forum’s closing panel picked it up right away, as standards contributors and researchers turned to a unified control plan, a common security framework, and AI-driven orchestration, and where to draw the line between what a marketing deck promises and what a subscriber really feels.
NTN-native 6G: what will seamless global connectivity actually look like?
Sean Kinney, principal analyst at RCRTech, opened the panel by asking his members to set expectations because “there is a huge risk of misalignment between what you see on marketing decks and TV commercials versus what might actually be an individual’s experience connecting to these future converged networks.” With him were Bernard Barani, senior external consultant at the 6G Industry Association (6G-IA); Sushmit Bhattacharjee, Senior Standards Architect with DOCOMO Euro-Labs; Dr. Yung-Han Chen, Deputy Division Director at ITRI, Taiwan’s Applied Research Institute; and Michele Polese, chair of Working Group 2 in the AI-RAN Alliance and technical director at Northeastern University’s Institute for Intelligent Networked Systems.
Bhattacharjee made the distinction that organized the discussion. “We should be able to distinguish between, for example, seamless connectivity and identical connectivity.” By the early 2030s, he expects the user to have a mobile service experience – the same device identity and subscription, with the network with terrestrial or non-terrestrial connectivity without the user managing any of it. “But that doesn’t necessarily mean that terrestrial broadband performance will be available everywhere. There will still be gaps. There will still be differences in capacity, latency and availability depending on which network serves the user.” The realistic goal is “ubiquitous service continuity”, and the range of services that the network can maintain grows as the NTN capacity improves. “Seamless should mean that the complexity is invisible to the user, not that the performance is identical everywhere.” Polese added that expectations are set commercially rather than through marketing, since many people have already experienced satellite connectivity on their own phones, and Chen, whose task is industrial, argued that the convergence of NTN and 6G opens a three-dimensional network frontier in which the task is reliable, affordable services that make more applications achievable.
Barani framed the challenge as managing a hype cycle. There are about 280 partnerships between MNOs and satellite network operators, some 120 to 125 of them for direct-to-device, but implementations such as Apple with Globalstar or T-Mobile with Starlink offer, in his words, “very embryonic type of services for very low rate type of things”, while the ITU 6G targets increase, 8 times to about 5.8 times. times – are “not necessarily the kind of things that NTN is able to deliver.” The opportunity, in his opinion, is that “for the first time in history, the satellite moves into the 3GPP ecosystem”, which lowers costs, opens up new services and gives satellite operators a device ecosystem – provided that the industry distinguishes fixed NTN services from mobile, where expectations must be managed at each transition from a satellite cell to a terrestrial one.
Called for the roadmap for a 6G with converged authentication, policy and orchestration, Polese added spectrum to the list – “Spectrum is a key part of TN and NTN integration, either pre-standardization or post-standardization” – along with policy cycles slower than technology and an IT component in which the operators are the orchestrators and the authenticity also comes from the connectivity, in the Height.” Chen said that ITRI is focusing on hybrid networks: software-defined terrestrial networks along the lines of SD-WAN, more efficient routing and flexible UDP-based protocols such as QUIC.
Barani described 6G-IA’s program of in-orbit experiments with satellite demonstrators built around TN/NTN integration. The first problem they are designed to address is a unified control plane – “a possibility to orchestrate resources from both the TN side and the satellite side as a kind of continuum of resources” – which requires standardization of NTN-specific functions. Handover is the clearest example. “On terrestrial networks, you run handover from the perspective of the strength of the signal. On NTN, in a satellite footprint, you basically have the same level,” so the handover is decided more naturally on the spot, using satellite ephemeris and beam position. One core controlling both segments would make end-to-end management much easier — but, Barani said, “I’m not sure that’s feasible.” 6G-IA’s experiments have two cores, and Barani sees promise in a neutral host model in which a multi-tenant satellite serves several operators through a sliced core; European projects have shown that co-managed cores can cut the handover time to a few tens of milliseconds. 6G-IA also evaluates ITU-T Y.3207, the Integrated Network Control Architecture for fixed, mobile and satellite convergence, as “a kind of meta-layer that has a visibility to the different resources provided by the different segments.”
Bhattacharjee brought the operator’s standards perspective and a reminder that “we’re not starting from scratch.” With 5G NTN, the direction was already to integrate satellite access into the mobile system, but in 5G, “NTN had to largely fit into a terrestrial first and terrestrial existing system, while 6G gives the industry the chance to create a common terrestrial, non-terrestrial network design baseline from day 1. Converged authentication, policy and orchestration “is certainly very realistic”, and operationally it needs three things: a common mobile Service and security frameworks; “the information required to describe such a heterogeneous ecosystem in a moving and ever-changing topology”; and orchestration and assurance mechanisms that operate across MNO and satellite provider domains. If an end-to-end service spans an MNO network, another satellite provider, and perhaps multiple gateways or cloud resources, ” Visibility of what is happening and must be able to provide an assured end-to-end service to the end user, because at the end of the day that is what the user really wants.
Polish expanded on what a converged control plane must decide. In addition to handoff between satellites or base stations, the question is which link to use anyway, and the UE can only decide autonomously up to a point, because “a terrestrial cell covers an area of several kilometers, while a beam from a satellite has a much wider coverage area.” What is needed is the equivalent of the RRC (Radio Resource Control) layer in today’s networks, where mobility decisions are made with knowledge that spans both domains, which raises the question of whether the control planes exposed to Open RAN’s RICs and SMOs (intelligent controller and orchestration layers) should extend towards satellites. “I think the answer is yes, but there’s definitely a lot of work and research to be done in that space.” He also raised AI first: how model-free adaptation translates into a converged control plane “is very much an open question – where do we get the data to train these models?” Non-terrestrial systems are often more predictable than terrestrial, matching digital twins, but “at some point you have to have validation,” and in-orbit testing is “a different level of challenge.”
Asked what the role of AI looks like in practice, Bhattacharjee said the decision space is what makes it necessary: terrestrial cells, HAPS (high-altitude platform stations), multiple tracks and paths, cloud and edge resources whose “capacity, load and availability are always changing, while the service itself has its own requirements.” AI can help in three areas – “prediction, orchestration and assurance” – but with an important qualification: “We will still standardize the information interfaces, policies and control mechanisms under the AI. Chen called AI the operating system for a network whose physical behavior is fundamentally different from what came before – machine learning on the physical layer to compensate for heavy Doppler, and reinforcement learning for predictive beam hopping so that, instead of empty oceans lighting, spot beams directed at busy shipping channels or flight corridors. The problem, he said, is how to train the AI to do what the industry expects of it – “that’s the big challenge we have to face now.”
Kinney’s closing question was whether the panel was confident that the vision would be delivered on a timeline and on a scale that would justify the investment. Barani was “The investments will be there”, because the satellite world converging in the 3GPP ecosystem is a powerful business incentive and “the cost of a kilo in orbit has decreased by a factor of 10 or more” in a decade. The main challenge is the ecosystem itself: the terrestrial side develops largely on TDD, while NTN standards lean on FDD – time and frequency division duplex, respectively, “so at some point we also have to have things that cover both options.” Bhattacharjee anchored his confidence in the value proposition. “The strongest value is where either terrestrial deployment is economically difficult, or the loss of connectivity has a disproportionately high cost” – remote areas and disaster resilience, but also maritime, aviation, logistics, infrastructure monitoring and agriculture. “These users aren’t buying satellite technology; they’re buying continuity, reach, resiliency or operational visibility, and that’s why native integration is really important. If NTN remains a separate terminal, separate subscription, and a separate operational ecosystem, the cost and complexity can really outweigh the value. But if the same framework can call upon NTN as just another resource, “the economy improves.” The one obstacle he singled out was Fragmentation, “because fragmentation prevents scale.” Poles agreed, with the addendum that vertical integration will be crucial because not everyone needs ubiquitous connectivity – the job is to define the value of the verticals that do.