From 832b8df6a89bfe1acf4ca9be1ee5765c3722292e Mon Sep 17 00:00:00 2001 From: luis_pereira87 Date: Tue, 19 Oct 2021 10:09:47 +0100 Subject: [PATCH] Handling Msg3 when transferred through DCCH --- openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c | 13 +++++++- .../LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c | 31 +++++++++++++++++-- 2 files changed, 40 insertions(+), 4 deletions(-) diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c index 9202f33375..82bf2a39a5 100644 --- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c +++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c @@ -1405,6 +1405,12 @@ void nr_generate_Msg4(module_id_t module_idP, int CC_id, frame_t frameP, sub_fra AssertFatal(coreset!=NULL,"Coreset cannot be null for RA-Msg4\n"); + // If UE is known by the network, to use C-RNTI instead of TC-RNTI + rnti_t tc_rnti = ra->rnti; + if(ra->crnti != 0) { + ra->rnti = ra->crnti; + } + int UE_id = find_nr_UE_id(module_idP, ra->rnti); NR_UE_info_t *UE_info = &nr_mac->UE_info; NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id]; @@ -1438,6 +1444,11 @@ void nr_generate_Msg4(module_id_t module_idP, int CC_id, frame_t frameP, sub_fra harq->is_waiting = true; ra->harq_pid = current_harq_pid; + // Remove UE associated to TC-RNTI + if(harq->round==0 && ra->rnti!=tc_rnti) { + mac_remove_nr_ue(module_idP, tc_rnti); + } + // get CCEindex, needed also for PUCCH and then later for PDCCH uint8_t aggregation_level; uint8_t nr_of_candidates; @@ -1769,7 +1780,6 @@ void nr_check_Msg4_Ack(module_id_t module_id, int CC_id, frame_t frame, sub_fram LOG_I(NR_MAC, "(ue %i, rnti 0x%04x) RA Procedure failed at Msg4!\n", UE_id, ra->rnti); nr_mac_remove_ra_rnti(module_id, ra->rnti); nr_clear_ra_proc(module_id, CC_id, frame, ra); - mac_remove_nr_ue(module_id, ra->rnti); } } else { @@ -1787,6 +1797,7 @@ void nr_clear_ra_proc(module_id_t module_idP, int CC_id, frame_t frameP, NR_RA_t ra->timing_offset = 0; ra->RRC_timer = 20; ra->msg3_round = 0; + ra->crnti = 0; if(ra->cfra == false) { ra->rnti = 0; } diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c index c336de704d..eb4ea76e0f 100644 --- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c +++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c @@ -325,6 +325,16 @@ int nr_process_mac_pdu(module_id_t module_idP, break; case UL_SCH_LCID_C_RNTI: + + for (int i = 0; i < NR_NB_RA_PROC_MAX; i++) { + NR_RA_t *ra = &RC.nrmac[module_idP]->common_channels[CC_id].ra[i]; + if (ra->state >= WAIT_Msg3 && ra->rnti == UE_info->rnti[UE_id]) { + ra->crnti = ((pduP[1]&0xFF)<<8)|(pduP[2]&0xFF); + LOG_D(NR_MAC, "Received UL_SCH_LCID_C_RNTI with CRNTI: 0x%04x\n", ra->crnti); + break; + } + } + //38.321 section 6.1.3.2 //fixed length mac_ce_len = 2; @@ -392,10 +402,25 @@ int nr_process_mac_pdu(module_id_t module_idP, mac_sdu_len = (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L; mac_subheader_len = 2; } - if (UE_info->CellGroup[UE_id]) { - LOG_D(NR_MAC, "[UE %d] Frame %d : ULSCH -> UL-DCCH %d (gNB %d, %d bytes), rnti: %d \n", module_idP, frameP, rx_lcid, module_idP, mac_sdu_len, UE_info->rnti[UE_id]); + + rnti_t crnti = UE_info->rnti[UE_id]; + int UE_idx = UE_id; + for (int i = 0; i < NR_NB_RA_PROC_MAX; i++) { + NR_RA_t *ra = &RC.nrmac[module_idP]->common_channels[CC_id].ra[i]; + if (ra->state >= WAIT_Msg3 && ra->rnti == UE_info->rnti[UE_id]) { + char *next_subpduP = pduP + mac_subheader_len + mac_sdu_len; + if ((pduP[mac_subheader_len+mac_sdu_len] & 0x3F) == UL_SCH_LCID_C_RNTI) { + crnti = ((next_subpduP[1]&0xFF)<<8)|(next_subpduP[2]&0xFF); + UE_idx = find_nr_UE_id(module_idP, crnti); + break; + } + } + } + + if (UE_info->CellGroup[UE_idx]) { + LOG_D(NR_MAC, "[UE %d] Frame %d : ULSCH -> UL-DCCH %d (gNB %d, %d bytes), rnti: 0x%04x \n", module_idP, frameP, rx_lcid, module_idP, mac_sdu_len, crnti); mac_rlc_data_ind(module_idP, - UE_info->rnti[UE_id], + crnti, module_idP, frameP, ENB_FLAG_YES,