Samsung claims 5G mobile data transmission breakthrough • Hacker News Board

Re: Samsung claims 5G mobile data transmission breakthrough

#21

Post by r00fus » Mon, May 13, 2013, 6:05 PM UTC

sp332 wrote: post #18

I thought 28 GHz signals would be stopped by relatively small obstacles (thin walls). It's not a matter of detection; the signal is absorbed and there is none left to detect on the other side. How could they overcome this with an antenna array? Edit: According to https://en.wikipedia.org/wiki/Ka_band this band is used for satellite communications, but it very susceptible to attenuation in rain. So it's very cool that…

So great theoretical speeds, but will likely fail consistenly in real-world use.

I'm going to wait until field trials in actual units are underway before becoming excited about this one.

Re: Samsung claims 5G mobile data transmission breakthrough

#22

Post by hexedpackets » Mon, May 13, 2013, 6:16 PM UTC

sp332 wrote: post #18

I thought 28 GHz signals would be stopped by relatively small obstacles (thin walls). It's not a matter of detection; the signal is absorbed and there is none left to detect on the other side. How could they overcome this with an antenna array? Edit: According to https://en.wikipedia.org/wiki/Ka_band this band is used for satellite communications, but it very susceptible to attenuation in rain. So it's very cool that…

Absorption is directly correlated with frequency, yes. Their 2km mile is probably a lab condition free-space number which will never even come close to being reached in the real world, especially in urban areas.

This could be useful to a telecom if they implement an expensive design that uses obstructions to their advantage. Essentially blast the radio waves down streets as if they are isolated tunnels. That would reduce interference to almost nothing, but require many more access points than they currently have. They would also still have the problem of penetration indoors.

Re: Samsung claims 5G mobile data transmission breakthrough

#23

Post by mwfunk » Mon, May 13, 2013, 6:33 PM UTC

soperj wrote: post #9

But I thought Samsung didn't innovate?

Well, if you read the article, it's not actually a Samsung thing. This is university research that was partially funded by a grant from Samsung among others.

Re: Samsung claims 5G mobile data transmission breakthrough

#24

Post by jlarsson » Mon, May 13, 2013, 7:16 PM UTC

Ericsson did an LTE-Advanced demo reaching around 950Mbps from a moving van almost 2 years ago ...

Re: Samsung claims 5G mobile data transmission breakthrough

#25

Post by gcb0 » Mon, May 13, 2013, 7:18 PM UTC

I honestly have a hard time wanting more than 3G at any time.

if anything, i'd like better latency and coverage.

Re: Samsung claims 5G mobile data transmission breakthrough

#26

Post by msh » Mon, May 13, 2013, 7:23 PM UTC

gcb0 wrote: post #25

I honestly have a hard time wanting more than 3G at any time. if anything, i'd like better latency and coverage.

my LTE connection got much better latency than 3g on the same carrier (maybe around 15-25 ms less)

Re: Samsung claims 5G mobile data transmission breakthrough

#27

Post by timmm » Mon, May 13, 2013, 7:41 PM UTC

FooBarWidget wrote: post #5

commiebob wrote: post #2

In other news, 5G users can now burn through their data cap in under 10 seconds!

Not to mention, drain their battery at 10 times the speed.

They said that about 4G and about higher screen resolutions, and about higher display dimensions.

They will innovate.

Re: Samsung claims 5G mobile data transmission breakthrough

#28

Post by timmm » Mon, May 13, 2013, 7:42 PM UTC

OGinparadise wrote: post #11

commiebob wrote: post #2

In other news, 5G users can now burn through their data cap in under 10 seconds!

Brilliantly put. I see some tech bloggers go through "specs" of speed, only to forget the data cap. If money is not an issue, then maybe, but most people usage over the cap will truly bite.

Sprint has no data cap...

Re: Samsung claims 5G mobile data transmission breakthrough

#29

Post by pieter » Mon, May 13, 2013, 7:51 PM UTC

All these faster speeds won't do anything really for heavily populated areas. The most important thing is total available bandwidth (bytes/sec/hz), and it's unclear how better that will get. LTE itself doesn't improve a lot over 3G techniques, the thing that's making LTE faster in saturated conditions right now is that there's just more bandwidth compared to 3G.

Re: Samsung claims 5G mobile data transmission breakthrough

#30

Post by criley » Mon, May 13, 2013, 8:20 PM UTC

timmm wrote: post #27

FooBarWidget wrote: post #5

Earlier quoted context omitted.

Not to mention, drain their battery at 10 times the speed.

They said that about 4G and about higher screen resolutions, and about higher display dimensions. They will innovate.

Will they?

My 3100mAh Galaxy Note II has 4G, and the battery life is noticeably worse than my old 1200mAh iPhone 3G.

Battery tech has long been one of the biggest limiting factors in mobile tech, and I'm not quite sure that advances in energy density are moving as quickly as everything else. Which means I think that batteries are slowly lasting less long as energy usage of new features consistently outstrips improvements in the tech.

Remember when phones used to last a week or a month? Now we're lucky to get a day, day and a half.