LTE Tutorial (Part 4) LTE RACH Procedure

[@amedc8663]

Congrats, finally someone explained this topic very well. Keep uploading videos. Regards!

[@lteplusplus1225]

thanks amed for your feedback.... sure i will upload more lectures in upcoming days.

[@anaschaudhary1644]

good explanation..keep it up

[@prashant364]

Very Nicely and precisely explained, keep doing the good work

[@lteplusplus1225]

Thanks Prashant for your feedback.

[@suryateja7254]

Excellent Explanation 👍... Keep up the Good work Bro...

[@lteplusplus1225]

Thanks Surya :)

[@mustkimalam4757]

Very nicely explained 👍🏻

[@pranjan85]

Excellent videos … requesting you to cover all topics related to lte and 5G … all the very best

[@lteplusplus1225]

Thanks Prabhat...stay tuned & Happy learning..!!

[@debayannew5083]

How UE decode center freq or freq synchronization mentioned in first step?

[@Shailesh_Thakur-o9o]

What mask index and resource index in PRACH ?

[@nrswitch6057]

Nice explain.

[@simpsonmathew1361]

How RA-RNTI is calculated and why it is used? Is it a unique ID or is it common to all UEs.

[@shankrananddivatagi3786]

RA-RNTI = 1 + Td, for FDD, where Td is the first subframe in which Rach Preamble is sent

[@simpsonmathew1361]

@@shankrananddivatagi3786 thanks

[@kundansingh-gq4vh]

please make Rach procedure part 2...

[@devas6623]

Good explanation

[@bhavinjoshi6780]

You are brilliant!!!

[@falguni.bonaparte]

Thank you so much! You have explained it really good!

[@lteplusplus1225]

Thanks Falguni for your feedback.

[@mahendranparamasivan3914]

what are failure happen in RACH?

[@lteplusplus1225]

Contention can take place if two UEs send same preamble at same time then out of two, rach of one ue will be failed

[@mauzmazamasti7729]

Can you explain how ue decode pss and Sss

[@praveenkumarmodugu6822]

please make videos on 5G concepts

[@eng.mahmoudmohammed3310]

Good

[@neerajshukla1988]

Bro,Why PHICh used in MIB?

[@lteplusplus1225]

PHICH is present in 1st ofdm sysmbol of all subframes. It is a DL channel and it is used to send ACKNOWLEDGEMENT of data received in UL.

[@neerajshukla1988]

@@lteplusplus1225 ok thnx..

[@neerajshukla1988]

@@lteplusplus1225 Adding something more about this.. pls correct me if m wrong..PHICH is transmitted in MIB.PHICH is used for ACK/NACK,but its configuration is present in MIB,Which tells ue abt no. of PHICH group, no. of PHICH RB's,so that ue can calculate PDCCH RB's or CCE
1 PHICH Group=8 PHICH's
Thanks🙏

[@billjosesibi372]

Can you post 5G videos also

[@lteplusplus1225]

will start soon Bill..stay tuned..!!

[@ranjeetjagadale4033]

What is RA_RNTI & HOW IT IS CALCULATED

[@lteplusplus1225]

RA-RNTI is ID in terms of frequency (provided by frequency offset present in sib2) and time (prach configuration index present in sib2)

[@kamscorner894]

Well before SIB1 MIB1 Is decoded and only after MIB one it decodes SIB1 From where it gets SIB2 , SO YOU MISED MIB