
diagram {

   LtePdcp -> LteRlc [label="send SDU"]
             LteRlc -> LteMacSapProvider [label="ReportBufferStatus ()"]
                       LteMacSapProvider -> LteEnbMac [label="DoReportBufferStatus ()"]
                                            LteEnbMac -> FfMacSchedSapProvider [label="SchedDlRlcBufferReq ()"]
                                                         FfMacSchedSapProvider -> Scheduler [label="DoSchedDlRlcBufferReq ()"]
                                                         FfMacSchedSapProvider <-- Scheduler
                                            LteEnbMac <-- FfMacSchedSapProvider
                       LteMacSapProvider <-- LteEnbMac
             LteRlc <-- LteMacSapProvider
   LtePdcp <-- LteRlc
   }

