top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

LTE: Why does MIB transmit only on "sub frame 0" of each radio frame ?

+1 vote
1,406 views

I mean to say, why does MIB transmit only on sub frame 0 not on other sub frames of same radio frame ?

posted Apr 1, 2014 by Vimal Kumar Mishra

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+2 votes

When the UE has obtained the slot after decoding PSS, the best case scenario is the UE figured out the Frame boundary(using SSS) in Subframe 0(which happens in slot0), in which case it can immediately(in the slot1 of subframe 0) obtain the MIB info. The worst case (or the only other) scenario is that it figures out in the subframe 5, in which case it has to wait another 5 subframes for the Frame start.
Once it obtained the Frame boundary, it makes sense to finish the MIB decoding in the subframe 0 itself, rather than waiting for another 5ms.

answer Apr 1, 2014 by Chandra Javalkar
Nice explaination.........
But I have a doubt here that UE first reads PSS from 7th symbol in slot 0 of subframe 0 then UE reads SSS from 6th symbol in slot 0 of subframe 5  right ? so does it mean UE obtains MIB info from subframe 5 or subframe 0 ? Is there a possibility that UE reads SSS info from 6th symbol of subframe 0 itself after reading PSS as 7th symbol in subframe 0 ?
Please correct me if my understanding is wrong somewhere !!
Similar Questions
0 votes

We know LTE scheduler works at the 1 millisecond level . Why it does not work at the 0.5 ms (slot) level ?

+2 votes

I came to know total six subframes of a radio frame can be used for MBSFN transmission. How UE come to know about exact number of sub frames that are being used in a radio frame ? Does the eNodeB send this information to UE or UE itself figure out ?

...