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Reply X2 Addition Request after F1 UE context setup in NSA

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This commit is contained in:
Robert Schmidt
2025-05-04 09:34:41 +02:00
committed by francescomani
parent 67f04d828a
commit fddcb2a5e8
2 changed files with 30 additions and 45 deletions
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openair2/RRC/NR/nr_rrc_defs.h
+2 -2
View File
@@ -221,9 +221,9 @@ typedef struct gNB_RRC_UE_s {
ngap_security_capabilities_t security_capabilities;
//NSA block
/* Number of NSA e_rab */
sctp_assoc_t x2_target_assoc;
int MeNB_ue_x2_id;
int nb_of_e_rabs;
/* list of pdu session to be setup by RRC layers */
nr_e_rab_param_t e_rab[NB_RB_MAX];//[S1AP_MAX_E_RAB];
uint32_t nsa_gtp_teid[S1AP_MAX_E_RAB];
transport_layer_addr_t nsa_gtp_addrs[S1AP_MAX_E_RAB];
openair2/RRC/NR/rrc_gNB_nsa.c
+28 -43
View File
@@ -221,6 +221,8 @@ void rrc_add_nsa_user(gNB_RRC_INST *rrc, x2ap_ENDC_sgnb_addition_req_t *m)
if(m!=NULL) {
UE->x2_target_assoc = m->target_assoc_id;
UE->MeNB_ue_x2_id = m->ue_x2_id;
gtpv1u_enb_create_tunnel_req_t create_tunnel_req = {0};
gtpv1u_enb_create_tunnel_resp_t create_tunnel_resp = {0};
if (m->nb_e_rabs_tobeadded>0) {
@@ -309,54 +311,37 @@ void rrc_add_nsa_user_resp(gNB_RRC_INST *rrc, gNB_RRC_UE_t *UE, const f1ap_ue_co
reconfig->criticalExtensions.present = NR_RRCReconfiguration__criticalExtensions_PR_rrcReconfiguration;
reconfig->criticalExtensions.choice.rrcReconfiguration = get_default_reconfig(UE->masterCellGroup);
/*NR_CG_Config_t *CG_Config =*/ generate_CG_Config(reconfig, UE->rb_config);
NR_CG_Config_t *CG_Config = generate_CG_Config(reconfig, UE->rb_config);
if (get_softmodem_params()->phy_test > 0 || get_softmodem_params()->do_ra > 0) {
/* we are done, no X2 answer necessary */
ASN_STRUCT_FREE(asn_DEF_NR_CG_Config, CG_Config);
return;
}
/*
MessageDef *msg;
msg = itti_alloc_new_message(TASK_RRC_ENB, 0, X2AP_ENDC_SGNB_ADDITION_REQ_ACK);
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).nb_e_rabs_admitted_tobeadded = m->nb_e_rabs_tobeadded;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).target_assoc_id = m->target_assoc_id;
MessageDef *msg = itti_alloc_new_message(TASK_RRC_ENB, 0, X2AP_ENDC_SGNB_ADDITION_REQ_ACK);
x2ap_ENDC_sgnb_addition_req_ACK_t *ack = &X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg);
for (int i = 0; i < UE->nb_of_e_rabs; i++) {
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].e_rab_id = UE->e_rab[i].param.e_rab_id;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gtp_teid = create_tunnel_resp.enb_S1u_teid[i];
memcpy(&X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr, &create_tunnel_resp.enb_addr, sizeof(transport_layer_addr_t));
//The length field in the X2AP targetting structure is expected in bits but the create_tunnel_resp returns the address length in bytes
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.length = create_tunnel_resp.enb_addr.length*8;
LOG_I(RRC,"S1-U create_tunnel_resp tunnel: index %d target gNB ip %d.%d.%d.%d length %d gtp teid %u\n",
i,
create_tunnel_resp.enb_addr.buffer[0],
create_tunnel_resp.enb_addr.buffer[1],
create_tunnel_resp.enb_addr.buffer[2],
create_tunnel_resp.enb_addr.buffer[3],
create_tunnel_resp.enb_addr.length,
create_tunnel_resp.enb_S1u_teid[i]);
LOG_I(RRC,"X2AP sGNB Addition Request: index %d target gNB ip %d.%d.%d.%d length %d gtp teid %u\n",
i,
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[0],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[1],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[2],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.buffer[3],
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gnb_addr.length,
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gtp_teid);
}
} else
LOG_W(RRC, "No E-RAB to be added received from SgNB Addition Request message \n");
ack->nb_e_rabs_admitted_tobeadded = UE->nb_of_e_rabs;
DevAssert(UE->x2_target_assoc > 0);
ack->target_assoc_id = UE->x2_target_assoc;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).MeNB_ue_x2_id = m->ue_x2_id;
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).SgNB_ue_x2_id = secondaryCellGroup->spCellConfig->reconfigurationWithSync->newUE_Identity;
//X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer_size = CG_Config_size; //Need to verify correct value for the buffer_size
// Send to X2 entity to transport to MeNB
asn_enc_rval_t enc_rval = uper_encode_to_buffer(&asn_DEF_NR_CG_Config,
NULL,
(void *)CG_Config,
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer,
sizeof(X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer));
X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).rrc_buffer_size = (enc_rval.encoded+7)>>3;
itti_send_msg_to_task(TASK_X2AP, ENB_MODULE_ID_TO_INSTANCE(0), msg); //Check right id instead of hardcoding
*/
for (int i = 0; i < UE->nb_of_e_rabs; i++) {
ack->e_rabs_admitted_tobeadded[i].e_rab_id = UE->e_rab[i].param.e_rab_id;
ack->e_rabs_admitted_tobeadded[i].gtp_teid = UE->nsa_gtp_teid[0];
memcpy(&ack->e_rabs_admitted_tobeadded[i].gnb_addr, &UE->nsa_gtp_addrs[0], sizeof(transport_layer_addr_t));
ack->e_rabs_admitted_tobeadded[i].gnb_addr.length = 32; // bits, IPv4 only
}
ack->MeNB_ue_x2_id = UE->MeNB_ue_x2_id;
ack->SgNB_ue_x2_id = UE->rrc_ue_id;
// Send to X2 entity to transport to MeNB
asn_enc_rval_t enc_rval =
uper_encode_to_buffer(&asn_DEF_NR_CG_Config, NULL, (void *)CG_Config, ack->rrc_buffer, sizeof(ack->rrc_buffer));
ack->rrc_buffer_size = (enc_rval.encoded + 7) >> 3;
itti_send_msg_to_task(TASK_X2AP, ENB_MODULE_ID_TO_INSTANCE(0), msg);
ASN_STRUCT_FREE(asn_DEF_NR_CG_Config, CG_Config);
}
void rrc_remove_nsa_user(gNB_RRC_INST *rrc, int rnti) {