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RLC: add per-UE RLF callback

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If the RLC cannot retransmit a package, 3GPP specs say that we should
declare radio link failure (RLF). Up to this commit, the code did
nothing though. In this commit, add a per-UE RLF callback; the RLC will
call into this function to signal that RLF has been detected through
maximum retransmissions on a particular RLC bearer.
This commit is contained in:
Robert Schmidt
2024-11-13 14:25:01 +01:00
committed by francescomani
parent 6beeb6eef1
commit f380a48a3b
3 changed files with 16 additions and 20 deletions
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openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
+11 -20
View File
@@ -619,10 +619,6 @@ static void max_retx_reached(void *_ue, nr_rlc_entity_t *entity)
int i;
int is_srb;
int rb_id;
#if 0
MessageDef *msg;
#endif
int is_enb;
/* is it SRB? */
for (i = 0; i < 2; i++) {
@@ -650,23 +646,18 @@ rb_found:
is_srb ? "SRB" : "DRB",
rb_id);
/* TODO: do something for DRBs? */
if (is_srb == 0)
return;
if (ue->rlf_handler)
ue->rlf_handler(ue->ue_id);
else
LOG_W(RLC, "UE %04x: RLF detected, but no callable RLF handler registered\n", ue->ue_id);
}
is_enb = nr_rlc_manager_get_enb_flag(nr_rlc_ue_manager);
if (!is_enb)
return;
#if 0
msg = itti_alloc_new_message(TASK_RLC_ENB, RLC_SDU_INDICATION);
RLC_SDU_INDICATION(msg).rnti = ue->rnti;
RLC_SDU_INDICATION(msg).is_successful = 0;
RLC_SDU_INDICATION(msg).srb_id = rb_id;
RLC_SDU_INDICATION(msg).message_id = -1;
/* TODO: accept more than 1 instance? here we send to instance id 0 */
itti_send_msg_to_task(TASK_RRC_ENB, 0, msg);
#endif
void nr_rlc_set_rlf_handler(int ue_id, rlf_handler_t rlf_h)
{
nr_rlc_manager_lock(nr_rlc_ue_manager);
nr_rlc_ue_t *ue = nr_rlc_manager_get_ue(nr_rlc_ue_manager, ue_id);
ue->rlf_handler = rlf_h;
nr_rlc_manager_unlock(nr_rlc_ue_manager);
}
void nr_rlc_reestablish_entity(int ue_id, int lc_id)
openair2/LAYER2/nr_rlc/nr_rlc_oai_api.h
+2
View File
@@ -44,6 +44,8 @@ struct NR_LogicalChannelConfig;
void nr_rlc_add_srb(int ue_id, int srb_id, const NR_RLC_BearerConfig_t *rlc_BearerConfig);
void nr_rlc_add_drb(int ue_id, int drb_id, const NR_RLC_BearerConfig_t *rlc_BearerConfig);
void nr_rlc_set_rlf_handler(int ue_id, rlf_handler_t rlf_h);
logical_chan_id_t nr_rlc_get_lcid_from_rb(int ue_id, bool is_srb, int rb_id);
void nr_rlc_reestablish_entity(int ue_id, int lc_id);
void nr_rlc_remove_ue(int ue_id);
openair2/LAYER2/nr_rlc/nr_rlc_ue_manager.h
+3
View File
@@ -37,12 +37,15 @@ typedef struct nr_rlc_rb_t {
} choice;
} nr_rlc_rb_t;
typedef void (*rlf_handler_t)(int rnti);
typedef struct nr_rlc_ue_t {
int ue_id;
nr_rlc_entity_t *srb0;
nr_rlc_entity_t *srb[3];
nr_rlc_entity_t *drb[MAX_DRBS_PER_UE];
nr_rlc_rb_t lcid2rb[32];
rlf_handler_t rlf_handler;
} nr_rlc_ue_t;
/***********************************************************************/