
   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                                                                       
   }          


