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Can anyone elaborate about Proportional fair scheduler for LTE?

+7 votes

I want to know formulated explanation..Basic is clear for me. How to implement it for LTE..any document and white paper links are welcomed. I am working on C Language.

posted Nov 19, 2013 by Shekhar P

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0 votes

I know buffer status report is sent from UE to eNodeB to request for UL resources. Can someone please explain how many types of buffer status reports have been defined till now and in what scenarios each one is used ?

+5 votes

Each carrier in LTE is 15khz so in a calculation i found that useful symbol time = 1/15khz = 66.6 mircosec

wrt to this
Each symbol duration is calculated like this
Normal Cyclic Prefix length = 4.69 microsec --- so each symbol in this = 66.6 + 4.69 = 71.29 microsec
Extended Cyclic Prefix length = 16.67 microsec ----so each symbol in this = 66.6 + 16.67 = 83.27 microsec

So Normal cyclic prefix Slot (7 symbols) duration = 71.29 * 7 = 499.03 microsec(0.49903 millis)
and Extended cyclic prefix Slot (6 symbols) duration = 83.27 * 6 = 499.63 microsec (0.49963 millis)

But slot duration is fixed as 0.5 ms ...

So does this slight difference creates any problem ???
How real time it works ???

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