Works up to the reception of HI_DCI0.request at the UE-PNF. Sometimes Msg3 arrives later than expected at the eNB-VNF.

Works up to the reception of the RA_RESPONSE at the UE. Crashing at fill_rx_indication_UE_MAC just before sending Msg3.

Fixed the issue with synchronization but only for the case o running both eNB (vnf) and UE (pnf) processes in the same machine. Receiving and decoding now all MIBs and SIBs1/2/3.

Testing works up to the reception of SIB1/2/3 from the UE through nfapi, but there is an issue with missing some of the nfapi messages for some frames.

Connected new callback functions at nfapi_pnf for phy_stub mode + Intorducing new functions initializing UE variables and threads specific to phy_stub mode, instead of extending the existing ones + Direct connection of the timer_thread with UE_phy_stub_thread_rxn_txnp4.

Introduce nfapi_mode variable to differentiate functionality between phy_stub_ue mode (nfapi_mode=3) and normal full stack mode (nfapi_mode!=3).

Added functions copying nfapi requests to UE_mac_inst + Substituted calls to phy_procedures_ue rx/tx with phy_stub functions triggering MAC layer Tx/Rx procedures at UE MAC. Changes within UE_thread_rxn_txnp4

Added handling of HI_DCI0_config requests at UE MAC. Eliminated calls to PHY functions from utilized UE MAC functions (e.g., ue_send_sdu) to support phy_stub operation mode.

Updated handling of DL_config and Tx_req pdus in phy_stub_UE to be compliant with nfapi callback functions

Added MAC level state variable for the UE and control mechanisms to ensure the correct operation of the UE MAC state machine.

Added remaining fill_harq indication functions + the functionality to handle ul_config request pdus arriving from nfapi-vnf: trigger the appropriate UE_MAC and fill_indication functions to prepare the UL_indications which will be put into the socket for transfer back to vnf. Main changes within phy_stub_UE().

Added fill functions for rx, crc and sr indications in phy_stub_UE. These functions will be getting called directly from the MAC layer of the UE. Rest of fill functions remain to be added.

Definition of the UE<->eNB MAC to MAC interface based on nFAPI structures: Currently supporting the triggering of MAC layer Rx operations at the UE side based on the reception of NFAPI DL messages. Partial definition of Sidelink MAC subheaders.