- Nokia - a Finnish company
- Ericsson - a Swedish company
- Samsung - a South Korean company
- ZTE - a Chinese company that the government part-owns
What is the core and why is Huawei being kept out of it?
A mobile phone network's core is sometimes likened to its heart or brain. It is where voice and other data is routed across various sub-networks and computer servers to ensure it gets to its desired destination. This involves: - authenticating subscribers so that specific users only get access to the services they have paid for and opted into - sending a call to the right radio tower to connect to another person's mobile phone - managing facilities such as call-forwarding and voicemail - delivering SMS messages and multimedia from one handset to another - routing data back and forth to third-party services such as apps and websites - keeping track of usage to calculate an individual's bill While once, a lot of this involved physical equipment known as routers and switches, in the 5G world much of this kit has been "virtualised". That means software rather than specialised hardware now takes care of much of the job. This opens the door to new capabilities. But a perceived risk is that it could also open the system up to new kinds of attack. And even if encryption means the information being handled cannot be spied upon, the fear is that a rogue participant could still crash the network - or at least disrupt the data flow.How does this differ from the rest of the network?
The core is distinct from the Radio Access Network, which is sometimes referred to as the "periphery". The RAN includes the base stations and antennas used to provide a link between individual mobile devices and the core. Insiders sometimes describe this as the "innovative but dumb" part of the network. That is because new traffic management software and other advances mean more traffic can be handled than before, but the equipment does not actually affect what happens to the data itself beyond transmitting it back and forth. Although it has commonly been reported that Huawei's advantage here is cost, industry insiders say a bigger advantage is that it can currently do the same job as its rivals using fewer antennas. That means fewer planning permission requests need to be approved, and 5G can be rolled out more quickly as a result. The theory is that by limiting Huawei to the RAN but banning it from the core, the authorities make the risk of its involvement more "manageable".So why are the Americans still worried?
The Trump administration's cyber-security chiefs, along with their Australian counterparts, contend that over time the "edge" - the name given to the boundary between the core and periphery - will disappear, as more and more sensitive operations are carried out closer to users. As a result, they claim it will no longer be possible to keep Huawei, and by extension the Chinese state, out of the network's most sensitive areas. UK network operators acknowledge that over time more functions will indeed move from centralised sites to individual exchanges and even base stations themselves. But they are adamant that they can still design the architecture of their networks to keep the core distinct and protected.DISCLAIMER: The Views, Comments, Opinions, Contributions and Statements made by Readers and Contributors on this platform do not necessarily represent the views or policy of Multimedia Group Limited.
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