Reinventing the Wireless Network Architecture Towards 6G: Cell-free Massive MIMO and Radio Stripes

In this popular science talk, Emil Björnson presents the motivation behind Cell-free Massive MIMO and how it can be implemented in 6G using radio stripes.

[@mcselcik]

Excellent explanation! Thank you!

[@BrunoLopes3MF]

It's very interesting. I will share it with my friends in Brazil.

[@nelliebanks9972]

can we invest now

[@reggiovanni]

Thumb up for your pronunciation of Fontana di Trevi :)

[@asilkoc14]

Very interesting work. Thank you!

[@freesixgen]

Too bad it's inaccurate and a baseless relating to 6G, and more of an explanation on how and why 5G is so harmful in its radiation infrastructure

[@freesixgen]

Nothing but an assumption on 6g and more about the problems of current hardware based towers

[@atchutram9894]

That is a great demonstration of deep understanding of wireless technology. Thanks for being kind to make the content freely available for public. Kindly answer my questions: 1) What about RF stages for the radio stripes? Are they part of the black processing units? 2) A non technical question-- who owns thestripes? Network operators? How do they safe guard them when they are placing them closer to users?

[@WirelessFuture]

1. Yes, the RF processing is done in the black antenna processing units, and the baseband processing is partially done in the black units and partially done at the central unit at one end of the stripe. 2. There are many options. It could be network operators that improve their coverage, or building owners that want to provide good indoor wireless connectivity (instead of using Wifi), or private persons that use them in their homes. The future will tell.

[@MdShakibAhmed-lu1hp]

Thanks sir

[@TechnologyPK]

Very Informative ..kindly also discuss Hybrid beamforming for massive MIMO systems

[@WirelessFuture]

Hybrid beamforming is one of the topics that we cover in the following podcast episode: kzbin.info/www/bejne/mqjXfqeIep2Ma5o And the following podcast explains why Digital beamforming will soon replace analog/hybrid beamforming: kzbin.info/www/bejne/hGjNo6igoa-ZkLM

[@ahmaddirani2661]

Very interesting thank you. My understanding is the distance between 2 dual cross polarized streams is equal to one or half wavelength. So for each frequency range we will have a dedicated strip, right ? 🤔

[@WirelessFuture]

Ahmad DIRANI Yes, two adjacent antennas are at least half a wavelength apart. It remains to be seen how many frequency bands can be handled in the same radio stripe. One can potentially have antennas for multiple bands in the same stripe, for example, every other antenna processing unit could manage a different band.

[@NachiketAyir]

Very interesting concept. Is there any proof of concept installation planned in near future in high cellular traffic density areas like the examples shown ?

[@WirelessFuture]

Not that we are aware of. This solution probably lies at least 5 years into the future, according to what was said on MWC 2019 www.fiercewireless.com/wireless/ericsson-refines-antenna-stripe-technology-to-improve-coverage

[@freesixgen]

No they haven't solved that problem of latency with increased traffic that my true 6G platform solved the more global users the faster my platform will eventually be up and over 15tbps, hence why my 6g will be free globally in order to attain a larger share of the global users and applications. The more the. Better

[@zakisat]

I was asking myself what the hell is that under the TV screen :)

[@RenoBlade2]

How long can an stripe be. 1km or 10km. I think on an Highway or something like that.

[@WirelessFuture]

Eduard Walz In principle, you can make it as long as you need. But you probably need to divide it into segments since the power is supplied from one end of a stripe and it will only reach a limited distance (not more than 1 km, I think). There are many implementation ideas and it remains to be seen what works out well in practice.

[@Dawson2011H]

Q: the wires link the antennas can also transmit radio waves, right ? How to shield the noises from them ?

[@WirelessFuture]

No, the cables will only transmit digital signals. The radio signals are generated in radio unit right next to each antenna.

[@Md.Sharif-ke8cp]

Good Ida really

[@maryem5168]

Hi. I have a question. If we are unable to reach certain users because of difficulty of setting up a base station, why not use a Repeater system with the existing architecture ?? Or is it something similar? Thanks

[@WirelessFuture]

A repeater system is a possible alternative for coverage extension, but it is less efficient. Firstly, because of the two-stage transmission where one needs to transit twice to reach the user once. Secondly, a repeater system will cause interference to other concurrent transmission in the area, while a cell-free system can control interference by optimizing how the signals are sent and received from the different antennas. Hence, it allows for spatial multiplexing of many users.

[@ABUNDANCEandBEYONDATHLETE]

@@WirelessFuture this is great. Network Engineer here.

[@sadeqebrahimi2925]

I was just thinking that what happen if some of these stripes have been cut. is data stream going to shut down? you now like series of lamps, what happen if one lamp broke

[@WirelessFuture]

If the stripe is cut in two parts, the outer part won’t work. However, if it is only one of the antennas that breaks down, the rest of the stripe could continue operating. At least it is possible to build it like that.

[@ajaybabu796]

Sir, I have one doubt. Is there any closed-form formula to calculate How many antennas that can able to fix on the base station. -

[@WirelessFuture]

The number of antennas is limited by size, weight, and cost constraints. If you only care about size, then you can assume that the antennas are separated by wavelength/2. For a given surface area A, the number of antennas that fit is A / (wavelength/2)^2.

[@ajaybabu796]

@@WirelessFutureI can understand. Thankyou

[@sudoscapy9631]

Can you do a lecture on radiostripes

[@WirelessFuture]

Here is a more technical paper on the same topic: kzbin.info/www/bejne/Z2LRgIl9aLNpq8k We might produce more videos in the future! So please subscribe to our channel :)

[@viciousabby]

genius

[@priyeshgupta164]

Great lecture... please it's a humble request do make a case study for Japanese truck agencies using 6G technology. 🙏🙏🙏

[@yaserahmed1811]

Great Lecture. Can you please explain how does it connect to the backhaul ?

[@WirelessFuture]

Any conventional technology can be used as backhaul to the stripe (connected to the central processing unit), such as fibre or microwave links. The fronthaul connection inside the cable can use conventional ethernet technology.

[@nelliebanks9972]

can i invest now

[@hullopes]

Is this stripe shown in the video real? I mean, is it the product itself?

[@WirelessFuture]

No, it is a mock-up that Ericsson made for the Mobile World Congress 2019. www.ericsson.com/en/blog/2019/2/radio-stripes

[@fleXcope]

Ahh... Those electric power poles.

[@freesixgen]

problem with directional cell towers is they are mostly high powered microwave cells/microwaves on poles which makes them harmful as to why towers were originally capped at 1watt per cell with 5g cells transmitting at and above 10 watts

[@WirelessFuture]

A transmission power of around 40 W per base station was quite common also in 4G. 5G is not increasing the transmit power, but rather makes use of the same (or less) power more efficiently. Since a mobile phone typically only receives a fraction 1/1,000,000,000 of that power (under good conditions), one can benefit a lot from shortening the distances between phones and base stations using the cell-free architecture. The transmit power can then be greatly reduced while the same amount of power is received by the phone.

[@mehtapramod23]

WE SHOULD INVEST HEAVILY ON HIGH SPEED INTERNET FOR NEXT 20 YEAR

[@James_Knott]

40 times is just 16 dB, not dBi. "dB" implies a ratio, in this case 40x. The "i" refers to isotropic, which is a theoretical omnidirectional antenna. So, when you say 16 dBi, you are saying 40x the signal from an isotropic antenna, which you did not mention.

[@WirelessFuture]

That is correct and it was actually mentioned at 7:20, though we didn’t use the technical term “isotropic” but described what it means instead.

[@lauteck6580]

5G not yep be use and u alrdy speak 6G LoL Later North Korea talk about 10G more stronger and powerful networks all the earth and 1000 time unlimited speed 😂😂😂