
   diagram {

   LtePdcp -> LteRlc [label="send SDU"]
             LteRlc -> LteMacSapProvider [label="ReportBufferStatus ()"]
                       LteMacSapProvider -> LteUeMac [label="DoReportBufferStatus ()"]
                                          LteUeMac -->> LteEnbMac [label="send ideal CTRL message"]
                       LteMacSapProvider <-- LteUeMac
             LteRlc <-- LteMacSapProvider
   LtePdcp <-- LteRlc
                                                        LteEnbMac ->  FfMacSchedSapProvider [label="SchedUlMacCtrlInfoReq ()"]
                                                                      FfMacSchedSapProvider ->  Scheduler [label="DoSchedUlMacCtrlInfoReq ()"]
                                                                      FfMacSchedSapProvider <-- Scheduler
                                                        LteEnbMac <--  FfMacSchedSapProvider
   }


