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NS-3: LTE Downlink Scheduling Flow

Brief description of a downlink scheduling flow to understand how the FemtoForum MAC Scheduler was implemented in NS-3.
by

Saulo da Mata

on 1 February 2016

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Transcript of NS-3: LTE Downlink Scheduling Flow

NS-3: The FemtoForum MAC Scheduler Interface
Saulo da Mata
www.saulodamata.com

Let`s follow a brief description of a downlink scheduling flow, to understand how the FemtoForum MAC Scheduler Interface was implemented in NS-3...
LteEnbPhy
LteEnbMac
PfMacScheduler
LteEnbPhy
LteHelper creates this instance of LteEnbPhy.
StartFrame
StartSubFrame
EnbMacMemberLteEnbPhySapUser
file: lte-enb-mac.cc
File: lte-enb-phy.cc
LteEnbPhy calls StartFrame method.
StartFrame calls StartSubFrame method.
SubframeIndication
StartSubFrame calls SubframeIndication method from class EnbMacMemberLteEnbPhySap.
File: lte-enb-mac.cc
DoSubframeIndication
SubframeIndication calls DoSubframeIndication method.
DoSchedDlConfigInd
SchedDlConfigInd calls DoSchedDlConfigInd method.
PfSchedulerMemberSchedSapProvider
file: pf-ff-mac-scheduler.cc
SchedDlTriggerReq
DoSubframeIndication calls SchedDlTriggerReq method from class PfSchedulerMemberSchedSapProvider.
DoSchedDlTriggerReq
SchedDlTriggerReq calls DoSchedDlTriggerReq method.

The resource scheduling is performed in this method.
File: pf-ff-mac-scheduler.cc
EnbMacMemberFfMacSchedSapUser
file: lte-enb-mac.cc
SchedDlConfigInd
DoSchedDlTriggerReq calls SchedDlConfigInd method from class EnbMacMemberFfMacSchedSapUser.
EnbMemberLteEnbPhySapProvider
file: lte-enb-phy.cc
SendLteControlMessage
DoSchedDlConfigInd calls SendLteControlMessage method from class EnbMemberLteEnbPhySapProvider.
DoSendLteControlMessage
SendLteControlMessage calls DoSendLteControlMessage method.
SetControlMessage
DoSendLteControlMessage calls SetControlMessage method.
(Downlink)
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