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Creating new queue for ul_ttis if dl_tti is late

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Also, this commit changes the len argument in the
pusharray32 to match the actual field type (uint16_t).
There is also simple name change from sf -> slot.
The new queueing system is not a permanent solution.
It was simply a way for us to try to handle late
dl_tti_requests. If we queue every single ul_tti_req
that we get, the queue gets full very quickly becasue
we only remove ul_ttis from the queue when a uci has
been populated with a matching sfn/sf. Because of this,
we only queue ul_ttis if we have a uci_indication
prepared already. Rarely, a dl_tti_req will arrive at
the NRUE too late, and the NRUE does not have time
to create the uci_ind so we dont process the corresponding
ul_tti. A seprate queue was made to hold all other ul_ttis
the arrive in the NRUE (this queue will continuously
get full and then emptied) but will occasionally hold
a ul_tti that corresponds to a uci that hasnt
been populated yet.
This commit is contained in:
Melissa Elkadi
2021-10-19 07:59:55 -07:00
parent ea2495ea0a
commit 58eb8d2af4
8 changed files with 37 additions and 7 deletions
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openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c
+23 -1
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@@ -60,6 +60,7 @@ queue_t nr_dl_tti_req_queue;
queue_t nr_tx_req_queue;
queue_t nr_ul_dci_req_queue;
queue_t nr_ul_tti_req_queue;
queue_t nr_wait_ul_tti_req_queue;
void nrue_init_standalone_socket(int tx_port, int rx_port)
{
@@ -731,7 +732,7 @@ static void enqueue_nr_nfapi_msg(void *buffer, ssize_t len, nfapi_p7_message_hea
}
LOG_I(NR_PHY, "Received an NFAPI_NR_PHY_MSG_TYPE_UL_TTI_REQUEST message in SFN/slot %d %d.\n",
ul_tti_request->SFN, ul_tti_request->Slot);
if (nr_uci_ind_queue.num_items > 0)
if (nr_uci_ind_queue.num_items > 0) //TODO: In the future UL_TTIs can be for ULSCH and SRS.
{
LOG_I(NR_MAC, "Melissa, we added UL_TTI_REQ to queue for sfn slot %d %d\n",
ul_tti_request->SFN, ul_tti_request->Slot);
@@ -746,6 +747,27 @@ static void enqueue_nr_nfapi_msg(void *buffer, ssize_t len, nfapi_p7_message_hea
}
}
}
/* TODO: This indicates that dl_tti_req was late or never arrived. If there are
not any prepared uci indications, the NRUE likely never had time to
populate the message is the dl_tti_req came in late and we received a
ul_tti_req immediately after the dl_tti_request. This is an attempt to
mitigate proxy timing issues. */
else if (nr_uci_ind_queue.num_items == 0)
{
LOG_I(NR_MAC, "Melissa, we added UL_TTI_REQ to queue for sfn slot %d %d\n",
ul_tti_request->SFN, ul_tti_request->Slot);
if (!put_queue(&nr_wait_ul_tti_req_queue, ul_tti_request))
{
reset_queue(&nr_wait_ul_tti_req_queue);
if (!put_queue(&nr_wait_ul_tti_req_queue, ul_tti_request))
{
LOG_E(NR_PHY, "put_queue failed for nr_wait_ul_tti_req_queue.\n");
free(ul_tti_request);
ul_tti_request = NULL;
}
}
}
break;
}