Add the skelecton of the MAC scheduler

openair2/LAYER2/MAC/eNB_scheduler_nb_iot.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.0  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/*! \file eNB_scheduler_nb_iot.c
+ * \brief top level of the scheduler, it scheduled in pdcch period based.
+ * \author  
+ * \date 2017
+ * \email: 
+ * \version 0.5
+ * @ingroup _mac
+ *
+ */
+
+#include "assertions.h"
+#include "PHY/defs.h"
+#include "PHY/extern.h"
+
+#include "SCHED/defs.h"
+#include "SCHED/extern.h"
+
+#include "LAYER2/MAC/defs.h"
+#include "LAYER2/MAC/extern.h"
+#include "LAYER2/MAC/proto.h"
+
+#include "LAYER2/MAC/defs_nb_iot.h"
+#include "LAYER2/MAC/proto_nb_iot.h"
+#include "PHY_INTERFACE/IF_Module_nb_iot.h"
+
+#include "RRC/LITE/extern.h"
+#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
+
+
+//#include "LAYER2/MAC/pre_processor.c"
+#include "pdcp.h"
+
+#if defined(ENABLE_ITTI)
+# include "intertask_interface.h"
+#endif
+
+/*function description
+* top level of the scheduler, this will trigger in every subframe, 
+* and determined if do the schedule by checking this current subframe is the start of the NPDCCH period or not
+*/
+
+void NB_eNB_dlsch_ulsch_scheduler(module_id_t module_idP, frame_t frameP, sub_frame_t subframeP, uint16_t hypersfn)  
+{
+
+}
+
+
+