Feb 12, 2018
While the satellite industry is all abuzz with “NewSpace,” down here on earth, the buzz is “5G.” Is there a
relationship between the two? Should there be?
When it comes to the “wish list” for the digital revolution, the market is demanding that services be unlimited, with
super-fast speeds – all the time. Services should be available everywhere, indoors or out; they should be reliable
and consistent, and switching between them should be seamless. This is clearly not our current reality.
Ubiquitous coverage has a ways to go. By 2020 current mobile LTE technology is expected to service 63% of the world’s
population, however that applies to only 37% of the world’s landmass, leaving huge sections of the planet and over
2.5 billion people without access to LTE service, so it seems there will be a role for satellite for quite some time
to come. How should the satellite industry prepare for integration with 5G as it develops?
5G is promising to transform the mobile experience, delivering data rates that could reach 1 Gbps on your device. It
will do this by improving spectral efficiency by up to 200%, meaning that 5G will transmit far more traffic over the
same amount of bandwidth as they can do now with LTE. In the process transmission latency will be significantly
reduced, as well as signaling overhead that has to be included in the bandwidth, thus making more bandwidth
available for users. 5G will provide increased support for the IoT (Internet of Things), connected vehicles, GPS,
Users will want to connect using home services, work services, mobile cellular services, and for many of them, VSAT
services in remote areas or as they move from place to place in a connected world. The goal of 5G, which is
scheduled to begin deployment in the early 2020s, is to become a sort of master wireless platform that can merge
with other mobile cellular, fixed broadband and local area networks, as part of a converged solution. Satellite
needs to be part of that converged solution.
The 5G rollout will likely be incremental. Today 4G/4.5G LTE Networks are already delivering up to 500 Mbps. 4.5 LTE
Networks will push that to 1 Gbps speeds. Meanwhile most 3G/4G/4.5G devices already have WiFi radios built in. It is
estimated that 70 – 90% of mobile data traffic is carried by WiFi networks today. The priorities for MNOs (Mobile
Network Operators), then will be to monetize their huge investments in the current networks while seeking to achieve
cost effective deployment of new “5G-like” networks and services.
Meanwhile in space, HTS (High Throughput Satellites) are currently delivering 50 – 200 Gbps and pushing 1 TBps by the
early 2020s. Innovation is occurring in all satellite bands with hybrid C/Ku-band, L/S-band systems, ongoing Ka-band
deployment, and Q-V band systems being constructed. We will soon see NGSO or non-geostationary orbit constellations
numbering in the hundreds being deployed and changing the game for high speed, low latency, ubiquitous broadband
satellite services. The satellite industry has increasing focus on mobility and M2M (machine-to-machine) services,
with fleets of tracking satellites, soon to be joined by broadband communications satellites in low earth orbit
The satellite industry has steadily moved towards open architecture, which many agree should be based on all-IP and
5G, in order to enable heterogeneous, yet fully integrated networks. End user speeds for consumers have continued to
climb for satellites, and are anticipated to climb from current 25 Mbps/3 Mbps consumer services, to speeds
approaching 100 Mbps. The goal is to drive prices to the point that they are competitive with terrestrial networks.
Satellites have continued to provide service for underserved communities, and to provide connectivity anywhere,
including land, air or sea.
Why does 5G matter to the satellite industry? For one thing, the industry can learn from the underlying technologies
being developed for 5G and not have to recreate the wheel by duplicating efforts or developing proprietary
solutions. In any event, satellite networks are going to need to support the 5G management and data interfaces so
they can provide viable 5G extensions through broadband and backhaul satellite links. Finally, there is a huge
advantage to the satellite industry participating in multi-access solutions, as well as entering new markets like
connected cars that will use wireless in town, and satellite on the road.
In order for the
satellite industry to align well with 5G there are certain principles and tools that will need to be
SDN or Software Defined Networking, is a mechanism that separates the data plane and control plane,
permitting decision making to be centralized and performed via a programmable interface. SDN is a term that
encompasses several network technologies. The aim is to make the entire network operate similar to a modern data
center with its virtualized server and storage infrastructure.
NFV or Network Function Virtualization, essentially removes network functions from boxes located
everywhere, and replaces them with pieces of software that operate where and as needed within the cloud network.
Where networking devices were once purchased with particular features and capabilities, now these capabilities are
essentially invoked by software, and modified as needed using standard off the shelf hardware, changing the
functionality of the device based on the networking tasks required, i.e. mesh or star, shared or dedicated, router
or firewall, etc.
Service Orchestration ties it together, automating the provisioning process, by leveraging “service
chaining.” The “service chain” is a representation of services connected across the network using software
provisioning. Instead of box by box configuration to deal with network changes, new services are implemented as
software-only, running on standard hardware. Connections can be set up and torn down as needed.
Evolved Packet Core (EPC) keeps track of an ever evolving mobile network, ensuring that users can
access the network from anywhere and maintain their level of expected services. A typical LTE Evolved Packet Core
(EPC) will have components such as a Home Subscriber Server to manage clients, a Mobility Management Entity which
manages access to the network, and a Serving Gateway which assigns a subscriber to a particular radio tower. It will
also have a server for authentication, authorization and accounting, a Policy and Charging Rules function, and
finally a Public Data Network Gateway that switches the traffic to the internet or other IP core network.
Satellite 5G or Sat5G providers will replace hard-coded hardware-based networks with software based, reconfigurable
networks. Satellite will need to embrace 5G, to make the industry even more relevant, as a tier one player in the
global telecom market. Forward thinking satellite technology providers such as iDirect Technologies, are already
researching how to incorporate SDN, NFV, EPC, etc. within a standardized framework that will ease integration and
The role of the satellite operator is likely to change from that of wholesale provider of
bandwidth, to value-added partners for 4G and 5G, as satellite integrates and extends service to IoT, M2M, connected
cars, trains, trucks, etc. Operators plan to offer services that integrate with 5G networks, delivering multi-media
video, broadband access, and contributing to initiatives such as Smart Cities, Smart Agriculture and Aero
Moving forward is going to require cooperation by multiple participants, each with its own characteristics.
Satellites are generally global networks that often provide services other technologies cannot replace. They
efficiently use and re-use frequency spectrum and generate economies of scale based on equipment used worldwide.
Currently they are more cost-effective in rural and remote areas, but that may be changing as satellite costs per
Mbps continue to decline and gain competitiveness with terrestrial options.
Terrestrial mobile operators on the other hand can use different national networks by using multiple radios inside
the device. It costs little to add multiple bands. Mobile providers are still making huge investments into 4G/LTE
and they will need to protect those investments, and roll them into 5G, not replace them outright. Fortunately there
is still plenty of allocated spectrum available to be licensed for mobile terrestrial services.
Looking at these characteristics, it’s evident that 5G will require a mix of technologies to deliver
subscriber/client needs. If all are to succeed, one sector, such as terrestrial cannot be at the expense of another,
such as satellite. 5G Spectrum management decisions must respect standards such as ITU WRC-15, and work within the
ITU (International Telecommunication Union) ensuring regulatory certainty to enable the future growth of all
All this being said, what is the “sweet spot” for satellite in the 5G future? Satellite will leverage its advantage
of high bandwidth and ubiquitous coverage to support several applications. Trunking and Head-End Feed applications
will use satellite to deliver high speed direct connectivity to remote or hard to reach locations. Backhauling and
Tower Feed by satellites will provide high speed connectivity including multicast content to wireless towers, access
points, and the cloud. Communications on the move (COTM) is another area of opportunity where satellites provide
connectivity for boats, trains, planes and even connected cars. Finally, satellites will continue to deliver content
that complements terrestrial broadband, including direct connectivity to end users at higher speeds and lower
prices. While these applications are already being supported by satellite services to some extent, the areas of
interest will increase as 5G integration becomes tighter between terrestrial and satellite based services.
In order to make all this happen, there are a variety of organizations coming together to discuss the critical
issues that will lead to success. One example is conferences like DC5G where telecom, industry experts, satellite
service providers, innovators and policy makers come together to learn about the future of the 5G ecosystem.
Prominent international organizations include the European Union’s Satellite and Terrestrial Network for 5G (SaT5G)
program, promoted by Avanti Communications, iDirect and others. SaT5G is the ESA’s (European Space Agency) Satellite
for 5G initiative. There is also the European Telecommunications Standards Institute (ETSI), and 3rd Generation
Partnership Project (3GPP). These organizations will discuss how 5G will eliminate restrictions for customers,
provide seamless connectivity and mobility, and make changes to the automobile industry. Participants will learn how
the industry can maximize profits if they work together. They will discuss and plan the roll-out of the 5G physical
infrastructure over a period of years and discuss how bandwidth will be allocated and distributed to various
providers. Discussion about enhanced network security and preventing interference will also be issues of interest,
and of course there will be marketing discussions about how to develop the backhaul market in different regions.
The communications industry has the challenge of developing a next generation communications system that
makes a true “global conversation” possible. As service providers, technology companies, innovators, policy makers
and other interested parties come together to develop an encompassing, agile, flexible platform capable of evolving
as demand and requirements change, so too might it globally connect all of us so that we might work together,
collaborating for a better future for our species and our home planet.