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Commit eb59c2cd authored by Konstantinos Alexandris's avatar Konstantinos Alexandris Committed by Cedric Roux
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bugfix: fix realtime issues with RRC (race condition) 

When testing x2 handover, we found a race issue between the
RRC thread and the phy/mac thread (which is calling rrc_rx_tx).

The UE context was updated by the RRC thread but in the middle of
the update (which consists of several function calls and variables'
updates) the context was accessed by rrc_rx_tx. At this point, the
context was in an inconsistent state.

The solution is to access RRC data in the RRC thread only.
The function rrc_rx_tx now just sends an ITTI message to the
RRC thread. When receiving this message, the RRC thread does
the processing that was done by the function rrc_rx_tx (in
the new function rrc_subframe_process).

This way, the race condition disappears.

However we now send an ITTI message from the phy/mac thread to
the RRC thread at each subframe. That might increase the processing
time of the eNB. So maybe it's not the best solution. It may also
improve the realtime performance because less work is done by the
phy/mac realtime thread. To be checked somehow.

Also, it may be possible that some other RRC functions are still
called by the phy/mac thread, which should also be checked and
replaced by ITTI messages (if this solution is considered to be
correct).
parent 458019d8
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Showing with 258 additions and 231 deletions
openair2/COMMON/rrc_messages_def.h
View file @ eb59c2cd
......@@ -72,3 +72,6 @@ MESSAGE_DEF(NAS_CONN_ESTABLI_CNF, MESSAGE_PRIORITY_MED, NasConnEstab
MESSAGE_DEF(NAS_CONN_RELEASE_IND, MESSAGE_PRIORITY_MED, NasConnReleaseInd, nas_conn_release_ind)
MESSAGE_DEF(NAS_UPLINK_DATA_CNF, MESSAGE_PRIORITY_MED, NasUlDataCnf, nas_ul_data_cnf)
MESSAGE_DEF(NAS_DOWNLINK_DATA_IND, MESSAGE_PRIORITY_MED, NasDlDataInd, nas_dl_data_ind)
// eNB: realtime -> RRC messages
MESSAGE_DEF(RRC_SUBFRAME_PROCESS, MESSAGE_PRIORITY_MED, RrcSubframeProcess, rrc_subframe_process)
openair2/COMMON/rrc_messages_types.h
View file @ eb59c2cd
......@@ -81,6 +81,8 @@
#define NAS_UPLINK_DATA_CNF(mSGpTR) (mSGpTR)->ittiMsg.nas_ul_data_cnf
#define NAS_DOWNLINK_DATA_IND(mSGpTR) (mSGpTR)->ittiMsg.nas_dl_data_ind
#define RRC_SUBFRAME_PROCESS(mSGpTR) (mSGpTR)->ittiMsg.rrc_subframe_process
//-------------------------------------------------------------------------------------------//
typedef struct RrcStateInd_s {
Rrc_State_t state;
......@@ -399,4 +401,10 @@ typedef nas_release_ind_t NasConnReleaseInd;
typedef ul_info_transfer_cnf_t NasUlDataCnf;
typedef dl_info_transfer_ind_t NasDlDataInd;
// eNB: realtime -> RRC messages
typedef struct rrc_subframe_process_s {
protocol_ctxt_t ctxt;
int CC_id;
} RrcSubframeProcess;
#endif /* RRC_MESSAGES_TYPES_H_ */
openair2/RRC/LTE/rrc_eNB.c
View file @ eb59c2cd
......@@ -7897,6 +7897,241 @@ void rrc_enb_init(void) {
memset(&rrc_release_info,0,sizeof(RRC_release_list_t));
}
//-----------------------------------------------------------------------------
void rrc_subframe_process(protocol_ctxt_t *const ctxt_pP, const int CC_id)
{
int32_t current_timestamp_ms = 0;
int32_t ref_timestamp_ms = 0;
struct timeval ts;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
struct rrc_eNB_ue_context_s *ue_to_be_removed = NULL;
#ifdef LOCALIZATION
double estimated_distance = 0;
protocol_ctxt_t ctxt;
#endif
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_RX_TX, VCD_FUNCTION_IN);
check_handovers(ctxt_pP); // counter, get the value and aggregate
// check for UL failure or for UE to be released
RB_FOREACH(ue_context_p, rrc_ue_tree_s, &(RC.rrc[ctxt_pP->module_id]->rrc_ue_head)) {
ctxt_pP->rnti = ue_context_p->ue_id_rnti;
if ((ctxt_pP->frame == 0) && (ctxt_pP->subframe == 0)) {
if (ue_context_p->ue_context.Initialue_identity_s_TMSI.presence == TRUE) {
LOG_I(RRC, "UE rnti %x: S-TMSI %x failure timer %d/8\n",
ue_context_p->ue_context.rnti,
ue_context_p->ue_context.Initialue_identity_s_TMSI.m_tmsi,
ue_context_p->ue_context.ul_failure_timer);
} else {
LOG_I(RRC, "UE rnti %x failure timer %d/8\n",
ue_context_p->ue_context.rnti,
ue_context_p->ue_context.ul_failure_timer);
}
}
if (ue_context_p->ue_context.ul_failure_timer > 0) {
ue_context_p->ue_context.ul_failure_timer++;
if (ue_context_p->ue_context.ul_failure_timer >= 20000) {
// remove UE after 20 seconds after MAC (or else) has indicated UL failure
LOG_I(RRC, "Removing UE %x instance, because of uplink failure timer timeout\n",
ue_context_p->ue_context.rnti);
ue_to_be_removed = ue_context_p;
break; // break RB_FOREACH
}
}
if (ue_context_p->ue_context.ue_release_timer_s1 > 0) {
ue_context_p->ue_context.ue_release_timer_s1++;
if (ue_context_p->ue_context.ue_release_timer_s1 >= ue_context_p->ue_context.ue_release_timer_thres_s1) {
LOG_I(RRC, "Removing UE %x instance, because of UE_CONTEXT_RELEASE_COMMAND not received after %d ms from sending request\n",
ue_context_p->ue_context.rnti,
ue_context_p->ue_context.ue_release_timer_thres_s1);
if (EPC_MODE_ENABLED)
rrc_eNB_generate_RRCConnectionRelease(ctxt_pP, ue_context_p);
else
ue_to_be_removed = ue_context_p;
ue_context_p->ue_context.ue_release_timer_s1 = 0;
break; // break RB_FOREACH
} // end if timer_s1 timeout
} // end if timer_s1 > 0 (S1 UE_CONTEXT_RELEASE_REQ ongoing)
if (ue_context_p->ue_context.ue_release_timer_rrc > 0) {
ue_context_p->ue_context.ue_release_timer_rrc++;
if (ue_context_p->ue_context.ue_release_timer_rrc >= ue_context_p->ue_context.ue_release_timer_thres_rrc) {
LOG_I(RRC, "Removing UE %x instance after UE_CONTEXT_RELEASE_Complete (ue_release_timer_rrc timeout)\n",
ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ue_release_timer_rrc = 0;
ue_to_be_removed = ue_context_p;
break; // break RB_FOREACH
}
}
pthread_mutex_lock(&rrc_release_freelist);
if (rrc_release_info.num_UEs > 0) {
uint16_t release_total = 0;
for (uint16_t release_num = 0; release_num < NUMBER_OF_UE_MAX; release_num++) {
if (rrc_release_info.RRC_release_ctrl[release_num].flag > 0) {
release_total++;
}
if ((rrc_release_info.RRC_release_ctrl[release_num].flag > 2) &&
(rrc_release_info.RRC_release_ctrl[release_num].rnti == ue_context_p->ue_context.rnti)) {
ue_context_p->ue_context.ue_release_timer_rrc = 1;
ue_context_p->ue_context.ue_release_timer_thres_rrc = 100;
if (EPC_MODE_ENABLED) {
int e_rab = 0;
MessageDef *msg_complete_p = NULL;
MessageDef *msg_delete_tunnels_p = NULL;
uint32_t eNB_ue_s1ap_id = ue_context_p->ue_context.eNB_ue_s1ap_id;
if (rrc_release_info.RRC_release_ctrl[release_num].flag == 4) { // if timer_s1 == 0
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB, MSC_S1AP_ENB, NULL, 0,
"0 S1AP_UE_CONTEXT_RELEASE_COMPLETE eNB_ue_s1ap_id 0x%06"PRIX32" ",
eNB_ue_s1ap_id);
msg_complete_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_COMPLETE);
S1AP_UE_CONTEXT_RELEASE_COMPLETE(msg_complete_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
itti_send_msg_to_task(TASK_S1AP, ctxt_pP->module_id, msg_complete_p);
}
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB, MSC_GTPU_ENB, NULL,0, "0 GTPV1U_ENB_DELETE_TUNNEL_REQ rnti %x ", eNB_ue_s1ap_id);
msg_delete_tunnels_p = itti_alloc_new_message(TASK_RRC_ENB, GTPV1U_ENB_DELETE_TUNNEL_REQ);
memset(&GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p), 0, sizeof(GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p)));
// do not wait response
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).rnti = ue_context_p->ue_context.rnti;
for (e_rab = 0; e_rab < ue_context_p->ue_context.nb_of_e_rabs; e_rab++) {
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).eps_bearer_id[GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).num_erab++] =
ue_context_p->ue_context.enb_gtp_ebi[e_rab];
// erase data
ue_context_p->ue_context.enb_gtp_teid[e_rab] = 0;
memset(&ue_context_p->ue_context.enb_gtp_addrs[e_rab], 0, sizeof(ue_context_p->ue_context.enb_gtp_addrs[e_rab]));
ue_context_p->ue_context.enb_gtp_ebi[e_rab] = 0;
}
itti_send_msg_to_task(TASK_GTPV1_U, ctxt_pP->module_id, msg_delete_tunnels_p);
struct rrc_ue_s1ap_ids_s *rrc_ue_s1ap_ids = NULL;
rrc_ue_s1ap_ids = rrc_eNB_S1AP_get_ue_ids(RC.rrc[ctxt_pP->module_id], 0, eNB_ue_s1ap_id);
if (rrc_ue_s1ap_ids != NULL) {
rrc_eNB_S1AP_remove_ue_ids(RC.rrc[ctxt_pP->module_id], rrc_ue_s1ap_ids);
}
} /* EPC_MODE_ENABLED */
rrc_release_info.RRC_release_ctrl[release_num].flag = 0;
rrc_release_info.num_UEs--;
break; // break for (release_num)
} // end if ((rrc_release_info.RRC_release_ctrl[release_num].flag > 2) && ...
if (release_total >= rrc_release_info.num_UEs) {
break; // break for (release_num)
}
} // end for (release_num)
} // end if (rrc_release_info.num_UEs > 0)
pthread_mutex_unlock(&rrc_release_freelist);
if ((ue_context_p->ue_context.ue_rrc_inactivity_timer > 0) && (RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres > 0)) {
ue_context_p->ue_context.ue_rrc_inactivity_timer++; // (un)comment this line to (de)activate the RRC inactivity timer
if (ue_context_p->ue_context.ue_rrc_inactivity_timer >= RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres) {
LOG_I(RRC, "Removing UE %x instance because of rrc_inactivity_timer timeout\n",
ue_context_p->ue_context.rnti);
ue_to_be_removed = ue_context_p;
break; // break RB_FOREACH
}
}
if (ue_context_p->ue_context.ue_reestablishment_timer > 0) {
ue_context_p->ue_context.ue_reestablishment_timer++;
if (ue_context_p->ue_context.ue_reestablishment_timer >= ue_context_p->ue_context.ue_reestablishment_timer_thres) {
LOG_I(RRC, "Removing UE %x instance because of reestablishment_timer timeout\n",
ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ul_failure_timer = 20000; // lead to send S1 UE_CONTEXT_RELEASE_REQ
ue_to_be_removed = ue_context_p;
ue_context_p->ue_context.ue_reestablishment_timer = 0;
break; // break RB_FOREACH
}
}
if (ue_context_p->ue_context.ue_release_timer > 0) {
ue_context_p->ue_context.ue_release_timer++;
if (ue_context_p->ue_context.ue_release_timer >= ue_context_p->ue_context.ue_release_timer_thres) {
LOG_I(RRC, "Removing UE %x instance because of RRC Connection Setup timer timeout\n",
ue_context_p->ue_context.rnti);
/*
* TODO: Naming problem here: ue_release_timer seems to have been used when RRC Connection Release was sent.
* It is no more the case.
* The timer should be renamed.
*/
ue_to_be_removed = ue_context_p;
ue_context_p->ue_context.ue_release_timer = 0;
break; // break RB_FOREACH
}
}
} // end RB_FOREACH
if (ue_to_be_removed) {
if ((ue_to_be_removed->ue_context.ul_failure_timer >= 20000) ||
((ue_to_be_removed->ue_context.ue_rrc_inactivity_timer >= RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres) &&
(RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres > 0))) {
ue_to_be_removed->ue_context.ue_release_timer_s1 = 1;
ue_to_be_removed->ue_context.ue_release_timer_thres_s1 = 100;
ue_to_be_removed->ue_context.ue_release_timer = 0;
ue_to_be_removed->ue_context.ue_reestablishment_timer = 0;
}
rrc_eNB_free_UE(ctxt_pP->module_id, ue_to_be_removed);
if (ue_to_be_removed->ue_context.ul_failure_timer >= 20000) {
ue_to_be_removed->ue_context.ul_failure_timer = 0;
}
if ((ue_to_be_removed->ue_context.ue_rrc_inactivity_timer >= RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres) &&
(RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres > 0)) {
ue_to_be_removed->ue_context.ue_rrc_inactivity_timer = 0; //reset timer after S1 command UE context release request is sent
}
}
#ifdef RRC_LOCALIZATION
/* for the localization, only primary CC_id might be relevant*/
gettimeofday(&ts, NULL);
current_timestamp_ms = ts.tv_sec * 1000 + ts.tv_usec / 1000;
ref_timestamp_ms = RC.rrc[ctxt_pP->module_id]->reference_timestamp_ms;
RB_FOREACH(ue_context_p, rrc_ue_tree_s, &(RC.rrc[ctxt_pP->module_id]->rrc_ue_head)) {
ctxt = *ctxt_pP;
ctxt.rnti = ue_context_p->ue_context.rnti;
estimated_distance = rrc_get_estimated_ue_distance(&ctxt, CC_id, RC.rrc[ctxt_pP->module_id]->loc_type);
if ((current_timestamp_ms - ref_timestamp_ms > RC.rrc[ctxt_pP->module_id]->aggregation_period_ms) &&
estimated_distance != -1) {
LOG_D(LOCALIZE, "RRC [UE/id %d -> eNB/id %d] timestamp %d frame %d estimated r = %f\n",
ctxt.rnti,
ctxt_pP->module_id,
current_timestamp_ms,
ctxt_pP->frame,
estimated_distance);
LOG_D(LOCALIZE, "RRC status %d\n",
ue_context_p->ue_context.Status);
push_front(&RC.rrc[ctxt_pP->module_id]->loc_list, estimated_distance);
RC.rrc[ctxt_pP->module_id]->reference_timestamp_ms = current_timestamp_ms;
} // end if
} // end RB_FOREACH
#endif
(void)ts; /* remove gcc warning "unused variable" */
(void)ref_timestamp_ms; /* remove gcc warning "unused variable" */
(void)current_timestamp_ms; /* remove gcc warning "unused variable" */
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_RX_TX, VCD_FUNCTION_OUT);
}
//-----------------------------------------------------------------------------
void *rrc_enb_process_itti_msg(void *notUsed) {
MessageDef *msg_p;
......@@ -7910,6 +8145,8 @@ void *rrc_enb_process_itti_msg(void *notUsed) {
itti_receive_msg(TASK_RRC_ENB, &msg_p);
msg_name_p = ITTI_MSG_NAME(msg_p);
instance = ITTI_MSG_INSTANCE(msg_p);
/* RRC_SUBFRAME_PROCESS is sent every subframe, do not log it */
if (ITTI_MSG_ID(msg_p) != RRC_SUBFRAME_PROCESS)
LOG_I(RRC,"Received message %s\n",msg_name_p);
switch (ITTI_MSG_ID(msg_p)) {
......@@ -8059,6 +8296,10 @@ void *rrc_enb_process_itti_msg(void *notUsed) {
openair_rrc_eNB_configuration(ENB_INSTANCE_TO_MODULE_ID(instance), &RRC_CONFIGURATION_REQ(msg_p));
break;
case RRC_SUBFRAME_PROCESS:
rrc_subframe_process(&RRC_SUBFRAME_PROCESS(msg_p).ctxt, RRC_SUBFRAME_PROCESS(msg_p).CC_id);
break;
default:
LOG_E(RRC, "[eNB %d] Received unexpected message %s\n", instance, msg_name_p);
break;
......@@ -8434,236 +8675,11 @@ rrc_rx_tx(
)
//-----------------------------------------------------------------------------
{
int32_t current_timestamp_ms = 0;
int32_t ref_timestamp_ms = 0;
struct timeval ts;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
struct rrc_eNB_ue_context_s *ue_to_be_removed = NULL;
#ifdef LOCALIZATION
double estimated_distance = 0;
protocol_ctxt_t ctxt;
#endif
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_RX_TX, VCD_FUNCTION_IN);
check_handovers(ctxt_pP); // counter, get the value and aggregate
// check for UL failure or for UE to be released
RB_FOREACH(ue_context_p, rrc_ue_tree_s, &(RC.rrc[ctxt_pP->module_id]->rrc_ue_head)) {
ctxt_pP->rnti = ue_context_p->ue_id_rnti;
if ((ctxt_pP->frame == 0) && (ctxt_pP->subframe == 0)) {
if (ue_context_p->ue_context.Initialue_identity_s_TMSI.presence == TRUE) {
LOG_I(RRC, "UE rnti %x: S-TMSI %x failure timer %d/8\n",
ue_context_p->ue_context.rnti,
ue_context_p->ue_context.Initialue_identity_s_TMSI.m_tmsi,
ue_context_p->ue_context.ul_failure_timer);
} else {
LOG_I(RRC, "UE rnti %x failure timer %d/8\n",
ue_context_p->ue_context.rnti,
ue_context_p->ue_context.ul_failure_timer);
}
}
if (ue_context_p->ue_context.ul_failure_timer > 0) {
ue_context_p->ue_context.ul_failure_timer++;
if (ue_context_p->ue_context.ul_failure_timer >= 20000) {
// remove UE after 20 seconds after MAC (or else) has indicated UL failure
LOG_I(RRC, "Removing UE %x instance, because of uplink failure timer timeout\n",
ue_context_p->ue_context.rnti);
ue_to_be_removed = ue_context_p;
break; // break RB_FOREACH
}
}
if (ue_context_p->ue_context.ue_release_timer_s1 > 0) {
ue_context_p->ue_context.ue_release_timer_s1++;
if (ue_context_p->ue_context.ue_release_timer_s1 >= ue_context_p->ue_context.ue_release_timer_thres_s1) {
LOG_I(RRC, "Removing UE %x instance, because of UE_CONTEXT_RELEASE_COMMAND not received after %d ms from sending request\n",
ue_context_p->ue_context.rnti,
ue_context_p->ue_context.ue_release_timer_thres_s1);
if (EPC_MODE_ENABLED)
rrc_eNB_generate_RRCConnectionRelease(ctxt_pP, ue_context_p);
else
ue_to_be_removed = ue_context_p;
ue_context_p->ue_context.ue_release_timer_s1 = 0;
break; // break RB_FOREACH
} // end if timer_s1 timeout
} // end if timer_s1 > 0 (S1 UE_CONTEXT_RELEASE_REQ ongoing)
if (ue_context_p->ue_context.ue_release_timer_rrc > 0) {
ue_context_p->ue_context.ue_release_timer_rrc++;
if (ue_context_p->ue_context.ue_release_timer_rrc >= ue_context_p->ue_context.ue_release_timer_thres_rrc) {
LOG_I(RRC, "Removing UE %x instance after UE_CONTEXT_RELEASE_Complete (ue_release_timer_rrc timeout)\n",
ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ue_release_timer_rrc = 0;
ue_to_be_removed = ue_context_p;
break; // break RB_FOREACH
}
}
pthread_mutex_lock(&rrc_release_freelist);
if (rrc_release_info.num_UEs > 0) {
uint16_t release_total = 0;
for (uint16_t release_num = 0; release_num < NUMBER_OF_UE_MAX; release_num++) {
if (rrc_release_info.RRC_release_ctrl[release_num].flag > 0) {
release_total++;
}
if ((rrc_release_info.RRC_release_ctrl[release_num].flag > 2) &&
(rrc_release_info.RRC_release_ctrl[release_num].rnti == ue_context_p->ue_context.rnti)) {
ue_context_p->ue_context.ue_release_timer_rrc = 1;
ue_context_p->ue_context.ue_release_timer_thres_rrc = 100;
if (EPC_MODE_ENABLED) {
int e_rab = 0;
MessageDef *msg_complete_p = NULL;
MessageDef *msg_delete_tunnels_p = NULL;
uint32_t eNB_ue_s1ap_id = ue_context_p->ue_context.eNB_ue_s1ap_id;
if (rrc_release_info.RRC_release_ctrl[release_num].flag == 4) { // if timer_s1 == 0
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB, MSC_S1AP_ENB, NULL, 0,
"0 S1AP_UE_CONTEXT_RELEASE_COMPLETE eNB_ue_s1ap_id 0x%06"PRIX32" ",
eNB_ue_s1ap_id);
msg_complete_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_COMPLETE);
S1AP_UE_CONTEXT_RELEASE_COMPLETE(msg_complete_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
itti_send_msg_to_task(TASK_S1AP, ctxt_pP->module_id, msg_complete_p);
}
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB, MSC_GTPU_ENB, NULL,0, "0 GTPV1U_ENB_DELETE_TUNNEL_REQ rnti %x ", eNB_ue_s1ap_id);
msg_delete_tunnels_p = itti_alloc_new_message(TASK_RRC_ENB, GTPV1U_ENB_DELETE_TUNNEL_REQ);
memset(&GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p), 0, sizeof(GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p)));
// do not wait response
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).rnti = ue_context_p->ue_context.rnti;
for (e_rab = 0; e_rab < ue_context_p->ue_context.nb_of_e_rabs; e_rab++) {
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).eps_bearer_id[GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).num_erab++] =
ue_context_p->ue_context.enb_gtp_ebi[e_rab];
// erase data
ue_context_p->ue_context.enb_gtp_teid[e_rab] = 0;
memset(&ue_context_p->ue_context.enb_gtp_addrs[e_rab], 0, sizeof(ue_context_p->ue_context.enb_gtp_addrs[e_rab]));
ue_context_p->ue_context.enb_gtp_ebi[e_rab] = 0;
}
itti_send_msg_to_task(TASK_GTPV1_U, ctxt_pP->module_id, msg_delete_tunnels_p);
struct rrc_ue_s1ap_ids_s *rrc_ue_s1ap_ids = NULL;
rrc_ue_s1ap_ids = rrc_eNB_S1AP_get_ue_ids(RC.rrc[ctxt_pP->module_id], 0, eNB_ue_s1ap_id);
if (rrc_ue_s1ap_ids != NULL) {
rrc_eNB_S1AP_remove_ue_ids(RC.rrc[ctxt_pP->module_id], rrc_ue_s1ap_ids);
}
} /* EPC_MODE_ENABLED */
rrc_release_info.RRC_release_ctrl[release_num].flag = 0;
rrc_release_info.num_UEs--;
break; // break for (release_num)
} // end if ((rrc_release_info.RRC_release_ctrl[release_num].flag > 2) && ...
if (release_total >= rrc_release_info.num_UEs) {
break; // break for (release_num)
}
} // end for (release_num)
} // end if (rrc_release_info.num_UEs > 0)
pthread_mutex_unlock(&rrc_release_freelist);
if ((ue_context_p->ue_context.ue_rrc_inactivity_timer > 0) && (RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres > 0)) {
ue_context_p->ue_context.ue_rrc_inactivity_timer++; // (un)comment this line to (de)activate the RRC inactivity timer
if (ue_context_p->ue_context.ue_rrc_inactivity_timer >= RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres) {
LOG_I(RRC, "Removing UE %x instance because of rrc_inactivity_timer timeout\n",
ue_context_p->ue_context.rnti);
ue_to_be_removed = ue_context_p;
break; // break RB_FOREACH
}
}
if (ue_context_p->ue_context.ue_reestablishment_timer > 0) {
ue_context_p->ue_context.ue_reestablishment_timer++;
if (ue_context_p->ue_context.ue_reestablishment_timer >= ue_context_p->ue_context.ue_reestablishment_timer_thres) {
LOG_I(RRC, "Removing UE %x instance because of reestablishment_timer timeout\n",
ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ul_failure_timer = 20000; // lead to send S1 UE_CONTEXT_RELEASE_REQ
ue_to_be_removed = ue_context_p;
ue_context_p->ue_context.ue_reestablishment_timer = 0;
break; // break RB_FOREACH
}
}
if (ue_context_p->ue_context.ue_release_timer > 0) {
ue_context_p->ue_context.ue_release_timer++;
if (ue_context_p->ue_context.ue_release_timer >= ue_context_p->ue_context.ue_release_timer_thres) {
LOG_I(RRC, "Removing UE %x instance because of RRC Connection Setup timer timeout\n",
ue_context_p->ue_context.rnti);
/*
* TODO: Naming problem here: ue_release_timer seems to have been used when RRC Connection Release was sent.
* It is no more the case.
* The timer should be renamed.
*/
ue_to_be_removed = ue_context_p;
ue_context_p->ue_context.ue_release_timer = 0;
break; // break RB_FOREACH
}
}
} // end RB_FOREACH
if (ue_to_be_removed) {
if ((ue_to_be_removed->ue_context.ul_failure_timer >= 20000) ||
((ue_to_be_removed->ue_context.ue_rrc_inactivity_timer >= RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres) &&
(RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres > 0))) {
ue_to_be_removed->ue_context.ue_release_timer_s1 = 1;
ue_to_be_removed->ue_context.ue_release_timer_thres_s1 = 100;
ue_to_be_removed->ue_context.ue_release_timer = 0;
ue_to_be_removed->ue_context.ue_reestablishment_timer = 0;
}
rrc_eNB_free_UE(ctxt_pP->module_id, ue_to_be_removed);
if (ue_to_be_removed->ue_context.ul_failure_timer >= 20000) {
ue_to_be_removed->ue_context.ul_failure_timer = 0;
}
if ((ue_to_be_removed->ue_context.ue_rrc_inactivity_timer >= RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres) &&
(RC.rrc[ctxt_pP->module_id]->configuration.rrc_inactivity_timer_thres > 0)) {
ue_to_be_removed->ue_context.ue_rrc_inactivity_timer = 0; //reset timer after S1 command UE context release request is sent
}
}
#ifdef RRC_LOCALIZATION
/* for the localization, only primary CC_id might be relevant*/
gettimeofday(&ts, NULL);
current_timestamp_ms = ts.tv_sec * 1000 + ts.tv_usec / 1000;
ref_timestamp_ms = RC.rrc[ctxt_pP->module_id]->reference_timestamp_ms;
RB_FOREACH(ue_context_p, rrc_ue_tree_s, &(RC.rrc[ctxt_pP->module_id]->rrc_ue_head)) {
ctxt = *ctxt_pP;
ctxt.rnti = ue_context_p->ue_context.rnti;
estimated_distance = rrc_get_estimated_ue_distance(&ctxt, CC_id, RC.rrc[ctxt_pP->module_id]->loc_type);
if ((current_timestamp_ms - ref_timestamp_ms > RC.rrc[ctxt_pP->module_id]->aggregation_period_ms) &&
estimated_distance != -1) {
LOG_D(LOCALIZE, "RRC [UE/id %d -> eNB/id %d] timestamp %d frame %d estimated r = %f\n",
ctxt.rnti,
ctxt_pP->module_id,
current_timestamp_ms,
ctxt_pP->frame,
estimated_distance);
LOG_D(LOCALIZE, "RRC status %d\n",
ue_context_p->ue_context.Status);
push_front(&RC.rrc[ctxt_pP->module_id]->loc_list, estimated_distance);
RC.rrc[ctxt_pP->module_id]->reference_timestamp_ms = current_timestamp_ms;
} // end if
} // end RB_FOREACH
#endif
(void)ts; /* remove gcc warning "unused variable" */
(void)ref_timestamp_ms; /* remove gcc warning "unused variable" */
(void)current_timestamp_ms; /* remove gcc warning "unused variable" */
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_RX_TX, VCD_FUNCTION_OUT);
MessageDef *message_p;
message_p = itti_alloc_new_message(TASK_RRC_ENB, RRC_SUBFRAME_PROCESS);
RRC_SUBFRAME_PROCESS(message_p).ctxt = *ctxt_pP;
RRC_SUBFRAME_PROCESS(message_p).CC_id = CC_id;
itti_send_msg_to_task(TASK_RRC_ENB, ctxt_pP->module_id, message_p);
return RRC_OK;
}
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