5G Beam Sweeping & SSB Beams

[@OurTechPlanet]

For 5G topics discussed in 5G Job Interviews, check out the complete playlist below :) 🌐5G Interview Topics 💡kzbin.info/aero/PL4OXTttOk9WiLsz4fR62lpPcT3Wx3l5OP

[@youssefsabbagh4341]

GREAT !! Can't wait for the next video !!

[@OurTechPlanet]

Next video is out kzbin.info/www/bejne/gF6UiWt5a9qho9U

[@mysterious_miracle]

Very good one, thanks for the upload.

[@OurTechPlanet]

You are welcome!

[@indramani8888]

how UE will initimate gNB about the best suited SSB beam from ssb burst, post beem sweeping ?

[@OurTechPlanet]

By using RACH. RACH preambles are divided in groups for each SSB Beam so the UE chooses a RACH preamble based on the best SSB Beam which notifies the gNB.

[@indramani8888]

​@@OurTechPlanetwill csi feedback plays any role over here in order to let gnb knows the best fit ssb. I have this confusion because somewhere I have read about ssb-ri in csi report

[@OurTechPlanet]

@@indramani8888 The general consensus among all vendors is that SSB usually does not have an interaction with CSI feedback.

[@m.karthikeyan6482]

Excellent session ❤

[@OurTechPlanet]

Thanks!

[@akhileshnigam9672]

Sir, I am unable to understand that how gNB able to know the location of UE using RSRP without knowing PMI value from UE ...

[@OurTechPlanet]

Basically, the RACH preambles are divided among each SSB Beam so the UE chooses the RACH preamble based on the SSB Beam that it wants to choose. When the gNB gets the RACH preamble, it understands that the UE has chosen which specific SSB Beam.

[@pughalzhenthi5839]

@@OurTechPlanet you mean to say that number of Random access preambles gNB send in configuration via SIB will be different for each SSB beams? for ex if there are 48 Random access preambles and 4 SSB beams 0-11 preamble IDs are for beam1, 12-23 will be for beam2 etc.. like this ?

[@anuragchakra]

Thanks sir understood clearly❤.. please make more ...

[@OurTechPlanet]

Thank you, I will

[@discoverrealitytv6454]

thanks for sharing valuable stuff...

[@OurTechPlanet]

Glad it was helpful!

[@m.karthikeyan6482]

Any video available for 5G cell search?

[@OurTechPlanet]

Let me make one next week on that topic

[@navas4303]

Thanks for nice explanation..How is Beam sweeping differ from beam forming ? Waiting for next vedio...

[@OurTechPlanet]

Next video coming in a couple of days, stay tuned :)

[@thelandofchampions]

Excellent

[@OurTechPlanet]

Thank you so much 😀

[@jeffoh4793]

I love the beam sweepy

[@OurTechPlanet]

Good :)

[@jyothi648]

Can you please do a session on UL Time alignment procedure

[@OurTechPlanet]

Sure, let me add that to my To-do list

[@Sarbatriks]

Thank you very much for all your videos . Can you plz make a video on how Single Carriers OFDMs are made in the uplink of both LTE and NR . I understand that CP-OFDM has higher PAPR and hence we have SC-OFDMA in uplink of 4G and DFTs-OFDM in uplink of 5G , which are OFDMs disguised as a single carrier wave and thus eliminates PAPR . But i cannot visualise this . Can you explain this phenomenon and also how IDFT/IFFT and FFT/DFT works in OFDM ? Thanks..

[@OurTechPlanet]

Sure, will work on this topic soon! Thanks for watching :)

[@Sarbatriks]

@@OurTechPlanet Thank you very much for your reply ..

[@OurTechPlanet]

You are welcome

[@prakashdangi7261]

Thanks

[@OurTechPlanet]

Glad to help!

[@coolmunzir]

Cons of having more SSB Beams per burst apart from increased overlapping and interference

[@OurTechPlanet]

More SSB Beams usually mean that SSB beams are narrower and more focused so it actually improves the SSB coverage and SINR. However, more SSB beams mean more SSB overhead and it also adds difficulty in implementation. Lastly, the SSB beam change triggers will cause additional overheads.