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nr: improve x2/rrc for ENDC

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This commit introduces several enhancements in X2AP and RRC to deal
with ENDC. The main goal is to deal with UE's on/off and with various
errors.

The following work is included:

    - DC prep and DC overall X2 timers
    - X2 messages for UE release and DC timers' timeout

Open problems:

    - what to do when the UE sends an scg Failure? This commit removes
      the UE. And this removal may not be correctly done
    - UE removal in the gNB's PHY layer (a next commit is coming,
      but it is hackish and will need a rework)
This commit is contained in:
Cedric Roux
2020-09-22 11:57:31 +02:00
parent 5372a3478a
commit 4236ff2b3e
103 changed files with 1235 additions and 160 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/COMMON/gtpv1_u_messages_types.h
+2
View File
@@ -98,6 +98,7 @@ typedef struct gtpv1u_enb_delete_tunnel_req_s {
uint8_t num_erab;
ebi_t eps_bearer_id[GTPV1U_MAX_BEARERS_PER_UE];
//teid_t enb_S1u_teid; ///< local SGW S11 Tunnel Endpoint Identifier
int from_gnb; ///< Indicates if the message comes from gNB or eNB (1 = comes from gNB, 0 from eNB)
} gtpv1u_enb_delete_tunnel_req_t;
typedef struct gtpv1u_enb_delete_tunnel_resp_s {
@@ -170,4 +171,5 @@ typedef struct {
in_addr_t enb_ip_address_for_S1u_S12_S4_up;
tcp_udp_port_t enb_port_for_S1u_S12_S4_up;
} Gtpv1uS1Req;
#endif /* GTPV1_U_MESSAGES_TYPES_H_ */
openair2/COMMON/x2ap_messages_def.h
+13 -5
View File
@@ -48,10 +48,18 @@ MESSAGE_DEF(X2AP_HANDOVER_CANCEL , MESSAGE_PRIORITY_MED, x2ap_han
/* handover messages X2AP <-> S1AP */
MESSAGE_DEF(X2AP_UE_CONTEXT_RELEASE , MESSAGE_PRIORITY_MED, x2ap_ue_context_release_t , x2ap_ue_context_release)
/*Senb bearer addition messages X2AP <-> RRC */
/* Senb bearer addition messages X2AP <-> RRC */
MESSAGE_DEF(X2AP_SENB_ADDITION_REQ , MESSAGE_PRIORITY_MED, x2ap_senb_addition_req_t , x2ap_senb_addition_req)
/*SGnb bearer addition messages X2AP <-> RRC */
MESSAGE_DEF(X2AP_ENDC_SGNB_ADDITION_REQ , MESSAGE_PRIORITY_MED, x2ap_ENDC_sgnb_addition_req_t , x2ap_ENDC_sgnb_addition_req)
MESSAGE_DEF(X2AP_ENDC_SGNB_ADDITION_REQ_ACK , MESSAGE_PRIORITY_MED, x2ap_ENDC_sgnb_addition_req_ACK_t , x2ap_ENDC_sgnb_addition_req_ACK)
MESSAGE_DEF(X2AP_ENDC_SGNB_RECONF_COMPLETE , MESSAGE_PRIORITY_MED, x2ap_ENDC_reconf_complete_t , x2ap_ENDC_sgnb_reconf_complete)
/* SGnb bearer addition messages X2AP <-> RRC */
MESSAGE_DEF(X2AP_ENDC_SGNB_ADDITION_REQ , MESSAGE_PRIORITY_MED, x2ap_ENDC_sgnb_addition_req_t , x2ap_ENDC_sgnb_addition_req)
MESSAGE_DEF(X2AP_ENDC_SGNB_ADDITION_REQ_ACK , MESSAGE_PRIORITY_MED, x2ap_ENDC_sgnb_addition_req_ACK_t, x2ap_ENDC_sgnb_addition_req_ACK)
MESSAGE_DEF(X2AP_ENDC_SGNB_RECONF_COMPLETE , MESSAGE_PRIORITY_MED, x2ap_ENDC_reconf_complete_t , x2ap_ENDC_sgnb_reconf_complete)
/* SGnb UE releases ('request' is for enb starting the process, 'required' for gnb) */
MESSAGE_DEF(X2AP_ENDC_SGNB_RELEASE_REQUEST , MESSAGE_PRIORITY_MED, x2ap_ENDC_sgnb_release_request_t , x2ap_ENDC_sgnb_release_request)
MESSAGE_DEF(X2AP_ENDC_SGNB_RELEASE_REQUIRED , MESSAGE_PRIORITY_MED, x2ap_ENDC_sgnb_release_required_t, x2ap_ENDC_sgnb_release_required)
/* ENDC timers' timeout X2AP <-> RRC */
MESSAGE_DEF(X2AP_ENDC_DC_PREP_TIMEOUT , MESSAGE_PRIORITY_MED, x2ap_ENDC_dc_prep_timeout_t , x2ap_ENDC_dc_prep_timeout)
MESSAGE_DEF(X2AP_ENDC_DC_OVERALL_TIMEOUT , MESSAGE_PRIORITY_MED, x2ap_ENDC_dc_overall_timeout_t , x2ap_ENDC_dc_overall_timeout)
openair2/COMMON/x2ap_messages_types.h
+45 -21
View File
@@ -25,22 +25,32 @@
#include "s1ap_messages_types.h"
#include "LTE_PhysCellId.h"
typedef enum {
X2AP_CAUSE_T_DC_PREP_TIMEOUT,
X2AP_CAUSE_T_DC_OVERALL_TIMEOUT,
X2AP_CAUSE_RADIO_CONNECTION_WITH_UE_LOST,
} x2ap_cause_t;
//-------------------------------------------------------------------------------------------//
// Defines to access message fields.
#define X2AP_REGISTER_ENB_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_register_enb_req
#define X2AP_SETUP_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_setup_req
#define X2AP_SETUP_RESP(mSGpTR) (mSGpTR)->ittiMsg.x2ap_setup_resp
#define X2AP_HANDOVER_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_handover_req
#define X2AP_HANDOVER_REQ_ACK(mSGpTR) (mSGpTR)->ittiMsg.x2ap_handover_req_ack
#define X2AP_REGISTER_ENB_CNF(mSGpTR) (mSGpTR)->ittiMsg.x2ap_register_enb_cnf
#define X2AP_DEREGISTERED_ENB_IND(mSGpTR) (mSGpTR)->ittiMsg.x2ap_deregistered_enb_ind
#define X2AP_UE_CONTEXT_RELEASE(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ue_context_release
#define X2AP_HANDOVER_CANCEL(mSGpTR) (mSGpTR)->ittiMsg.x2ap_handover_cancel
#define X2AP_SENB_ADDITION_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_senb_addition_req
#define X2AP_ENDC_SGNB_ADDITION_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_addition_req
#define X2AP_ENDC_SGNB_ADDITION_REQ_ACK(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_addition_req_ACK
#define X2AP_ENDC_SGNB_RECONF_COMPLETE(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_reconf_complete
#define X2AP_REGISTER_ENB_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_register_enb_req
#define X2AP_SETUP_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_setup_req
#define X2AP_SETUP_RESP(mSGpTR) (mSGpTR)->ittiMsg.x2ap_setup_resp
#define X2AP_HANDOVER_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_handover_req
#define X2AP_HANDOVER_REQ_ACK(mSGpTR) (mSGpTR)->ittiMsg.x2ap_handover_req_ack
#define X2AP_REGISTER_ENB_CNF(mSGpTR) (mSGpTR)->ittiMsg.x2ap_register_enb_cnf
#define X2AP_DEREGISTERED_ENB_IND(mSGpTR) (mSGpTR)->ittiMsg.x2ap_deregistered_enb_ind
#define X2AP_UE_CONTEXT_RELEASE(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ue_context_release
#define X2AP_HANDOVER_CANCEL(mSGpTR) (mSGpTR)->ittiMsg.x2ap_handover_cancel
#define X2AP_SENB_ADDITION_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_senb_addition_req
#define X2AP_ENDC_SGNB_ADDITION_REQ(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_addition_req
#define X2AP_ENDC_SGNB_ADDITION_REQ_ACK(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_addition_req_ACK
#define X2AP_ENDC_SGNB_RECONF_COMPLETE(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_reconf_complete
#define X2AP_ENDC_SGNB_RELEASE_REQUEST(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_release_request
#define X2AP_ENDC_SGNB_RELEASE_REQUIRED(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_sgnb_release_required
#define X2AP_ENDC_DC_PREP_TIMEOUT(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_dc_prep_timeout
#define X2AP_ENDC_DC_OVERALL_TIMEOUT(mSGpTR) (mSGpTR)->ittiMsg.x2ap_ENDC_dc_overall_timeout
#define X2AP_MAX_NB_ENB_IP_ADDRESS 2
@@ -144,6 +154,8 @@ typedef struct x2ap_register_enb_req_s {
/* timers (unit: millisecond) */
int t_reloc_prep;
int tx2_reloc_overall;
int t_dc_prep;
int t_dc_overall;
} x2ap_register_enb_req_t;
typedef struct x2ap_subframe_process_s {
@@ -357,6 +369,8 @@ typedef struct x2ap_ENDC_sgnb_addition_req_ACK_s {
int SgNB_ue_x2_id;
int gnb_x2_assoc_id; // to be stored in the rrc's ue context, used when sending 'sgnb reconfiguration complete'
/* used for X2AP->RRC in source eNB */
int rnti;
@@ -384,16 +398,26 @@ typedef struct x2ap_ENDC_sgnb_addition_req_ACK_s {
typedef struct x2ap_ENDC_reconf_complete_s {
int MeNB_ue_x2_id;
int SgNB_ue_x2_id;
LTE_PhysCellId_t target_physCellId;
x2ap_sgNB_reconf_response_information_t reconf_response;
uint8_t rrc_buffer[4096 /* arbitrary, big enough */];
int rrc_buffer_size;
int gnb_x2_assoc_id;
} x2ap_ENDC_reconf_complete_t;
typedef struct x2ap_ENDC_sgnb_release_request_s {
int rnti;
x2ap_cause_t cause;
int assoc_id;
} x2ap_ENDC_sgnb_release_request_t;
typedef struct x2ap_ENDC_sgnb_release_required_s {
int gnb_rnti;
} x2ap_ENDC_sgnb_release_required_t;
typedef struct x2ap_ENDC_dc_prep_timeout_s {
int rnti;
} x2ap_ENDC_dc_prep_timeout_t;
typedef struct x2ap_ENDC_dc_overall_timeout_s {
int rnti;
} x2ap_ENDC_dc_overall_timeout_t;
#endif /* X2AP_MESSAGES_TYPES_H_ */