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Is there any UL scheduler available at UE side ?

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If UL scheduler available then which algorithm it has?If UL scheduler not available then how UE will schedule UL data to ENB?

posted Apr 26, 2017 by Poonam

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1 Answer

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Every vendor uses its own algorithm for scheduler to meet 3GPP data speed requirement. MAC specification does not capture any specific algorithm. Scheduler is necessary since when data receives from different logical channels and need to send to eNodeB.
Based on the scheduling algorithm, UE ask for uplink grant from the eNodeB and eNodeB grants uplink radio resources based on availability of resources.
I believe that algorithms are proprietary and nobody will share publicly.

answer Apr 27, 2017 by Harshita
Thank you. so you meant to say UL scheduler available in UE side and they didn't expose the algorithm?
DL/UL both schedulers are at NodeB/eNB side. UE can just request for scheduling grant in the uplink!
Say e.g UE has 4 LC and ENB given single grant, then how UE will select those LC? because when UE ask grant it is single bundle of grant.
@Faisal, I answered considering scheduling between different logical channels at UE . Each logical channel has different characteristics such as priority, bit rate. As you said DL/UL both schedulers are at eNodeB side. This is correct in terms of PDSCH and PUSCH radio resource scheduling among all the connected UE within a cell.