Mobile devices are now so prolific it is hard to imagine our lives without them. We are used to always being connected to the outside world so it can be a strange feeling when you end up in an area with no signal. This is especially worrying when an emergency arises.
Some technology companies are attempting to solve these issues. For example, Apple’s new iPhone will provide limited satellite communications. In emergency situations, users will be able to connect to a Globalstar satellite and send compressed, short messages to emergency services and other contacts. This information can include the coordinates of the device in case the user requires rescue.
US-based mobile operator T-Mobile have taken another approach by teaming up with SpaceX, whose next generation of Starlink satellites will include antennas that will provide a wireless signal using the existing mobile spectrum. This means that end-users will not be limited to a specific phone and can continue to use their existing devices. While the bandwidth offered by this service will be far lower than that provided by ground-based antennas, users should be able to send text messages to their contacts no matter how remote their location.
Of course, neither of these solutions replaces more traditional methods of mobile communications, which now provide the higher bandwidth and low-latency communications that consumers demand. However, they will certainly be reassuring in an emergency.
Mobile operators will also continue to expand their existing networks as wide as possible as well, not least because it is far cheaper to build a mobile base station than it is to launch a rocket filled with satellites into space.
For a more grounded introduction, PTT has a range of courses covering mobile and wireless networks such as "Wireless communications", "Introduction to mobile systems" and "Mobile radio communications". These courses are ideal for those joining the industry in a technical role who require a comprehensive introduction to the technologies, standards and infrastructure involved in mobile radio provision.