5G Network end-to-end demonstration by Ericsson • Hacker News Board

Re: 5G Network end-to-end demonstration by Ericsson

#71

Post by neom » Fri, Feb 17, 2017, 12:52 PM UTC

yaantc wrote: post #58

neom wrote: post #5

I hope that the network vendors and the IoT vendors sit down and think about how the devices and the network can work to mitigate things like large-scale IoT DDoS etc. Even if this mean new protocoling or whatever. I'm not sure I'm thinking about this exactly correctly, but I feel there is something in there?

Cellular IoT doesn't really have the problem seen with Mirai & co DDoS attacks. A cellular device is attached to a cellular network first, and for many application are not even on the Internet. In 3GPP cellular IoT (2G/GPRS, 3G/UMTS to HSPA, 4G/LTE) it is very common for devices to be on what's called a private APN. It's a private IP network, and the cellular operator provides a VPN access to this private network to…

That was my point, in a massive IoT deployment devices are maybe safer when they stay off LAN.

Re: 5G Network end-to-end demonstration by Ericsson

#72

Post by zanny » Sat, Feb 18, 2017, 6:56 AM UTC

wbl wrote: post #65

zanny wrote: post #43

Earlier quoted context omitted.

Free nights and weekends is exactly anti-net-neutrality. I have always been an advocate for more, open, spectrum, and simple laws to outlaw intentional interference. We are not operating dumb radios - we can dynamically change or allocate spectrum channels to load balance congestion and avoid making it worse. To legally cordon off everyone into separate silos is a hatchet solution to a nuanced problem with much bette…

The Shannon-Hartley theorem is a harsh master. You cannot squeeze more then bandwidth times log 1+S/N through a radio link. You cannot have antenna gain beyond the diffraction limit. Power amplifiers have limited bandwidth.

Which is exactly why the law is the limiting factor rather than physics.

We have the ability to programmatically build radios that can adjust bandwidth channels on demand, in fairly broad ranges. But because spectrum is treated as a commodity to be owned by private entities, nobody can utilize the potential of load balancing across all possible radio spectrum (both immediately and in macroscopic economic trends).

If we are stuck with the ~800mhz combined spectrum openly available today, of course we will continue to see incredible bottlenecks in congested wireless environments. But in practice there is about ~10ghz of practically usable spectrum for wireless data transfer, and you can fit a lot more channels in the low end.

Re: 5G Network end-to-end demonstration by Ericsson

#73

Post by jbergens » Mon, Feb 20, 2017, 8:37 AM UTC

marasal wrote: post #61

rhino369 wrote: post #26

Earlier quoted context omitted.

The technology is still a bottleneck, but the business model just isn't tightly fitted to the limitations of the bottle neck. 4G cannot viably stream 1080p netflix into the number of homes in America that use it at any given time (unless you use an unrealistic number of cell sites). Some sort of rationing has to occur otherwise cells would be overrun. Carriers should bring back free nights and weekends.

4G has been my only connection at home since 2013. I pay 20 euros a month for unlimited 50Mbit/s 4G connection and I can watch two Netflix 1080p streams and do other things at the same time easily. ISP also provides public IPv4 address so I can run servers at home. I live in Finland.

I think Finland is the exception, almost all other countries including Sweden has data caps.