In NR,systemFrameNumber : 10 bits, MIB carry 6 bit MSB

openair2/RRC/NR/L2_nr_interface.c

@@ -22,8 +22,8 @@ int8_t mac_rrc_nr_data_req(const module_id_t Mod_idP,
   asn_enc_rval_t enc_rval;
   //SRB_INFO *Srb_info;
   //uint8_t Sdu_size                = 0;
-  uint8_t sfn                     = (uint8_t)((frameP>>4)&0xff);
-
+  uint8_t sfn                     = (uint8_t)((frameP>>4)&0x3f);
+  
 #ifdef DEBUG_RRC
   int i;
   LOG_I(RRC,"[eNB %d] mac_rrc_data_req to SRB ID=%d\n",Mod_idP,Srb_id);

openair2/RRC/NR/MESSAGES/asn1_msg.c

@@ -205,10 +205,10 @@ uint8_t do_MIB_NR(rrc_gNB_carrier_data_t *carrier,
   mib->message.choice.mib = CALLOC(1,sizeof(struct NR_MIB));
   memset(mib->message.choice.mib,0,sizeof(struct NR_MIB));
   //36.331 SFN BIT STRING (SIZE (8)  , 38.331 SFN BIT STRING (SIZE (6))
-  uint8_t sfn = (uint8_t)((frame>>4)&0xff);
+  uint8_t sfn_msb = (uint8_t)((frame>>4)&0x3f);
   mib->message.choice.mib->systemFrameNumber.buf = &sfn;
   mib->message.choice.mib->systemFrameNumber.size = 1;
-  mib->message.choice.mib->systemFrameNumber.bits_unused=0;
+  mib->message.choice.mib->systemFrameNumber.bits_unused=2;
 
   //38.331 spare BIT STRING (SIZE (1))
   uint16_t *spare= calloc(1, sizeof(uint16_t));